JP2000288590A - Treatment system of sludge liquid, deodorizing method of sludge liquid and treatment method of animal primitive urine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sludge liquid treatment system capable of performing mass treatment inexpensively and also simple in maintenance, a deodorizing method of a sludge liquid and a treatment method of animal primitive urine and to realize the continuous operation treatment of the sludge liquid. SOLUTION: In a sludge liquid treatment system 10a, a deodorizing apparatus includes a first negative pressure reaction device 13 having a first reaction tank 16 having a sludge liquid portion L1 and a gas portion G and an adjusting tank 20 fitted with an on-off valve opened to the atmosphere on one end side thereof arranged in the sludge liquid portion L1 on the other end side provided with a plurality of holes 54 thereof and a negative pressure generating means 18 generating negative pressure in the first reaction tank and the centrifugal separation device 14 communicating with the first reaction tank 16 is provided and the centrifugal separation device 14 has a centrifugal rotary tank 22 receiving the sludge liquid and having a plurality of holes provided to its peripheral wall and the discharge port 24 provided to the bottom portion of the centrifugal rotary tank to continuously discharge the solid of the sludge liquid.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for treating sludge liquid, and more particularly to a system for treating animal manure, sewage and other sludge liquids, a method for deodorizing sludge liquid, a method for treating animal raw urine, and a centrifuge for treating sludge liquid. It relates to a separation device.

[0002]

BACKGROUND OF THE INVENTION For domestic wastewater, sewage, and some factory wastewater, recent efforts have been made to protect the environment on a global environmental scale. Those wastewater and sewage that can be converted to fertilizer are converted to fertilizer, and the rest is often discharged directly into rivers. The fact is that rivers and oceans are purified after being purified. A large amount of cost is required for a purifying apparatus and a processing operation for purifying the substance to the extent that the standards can be cleared. On the other hand, there is a demand for the development of a practical device that can satisfy the urgent task of environmental protection.

[0003]

The treatment of sludge is particularly effective for cattle, pigs, and cattle in the livestock sector, mainly for breeding and fattening.
No effective measures have been taken for the treatment of chicken and other animal manure. For example, animal manure discharged in large quantities at livestock estates and the like is not able to catch up with solid fertilizer at all, and is temporarily stored in a large raw urine tank (storage tank) for the most part to infiltrate underground. For this reason, a bad smell was generated, which became a bad smell pollution to the local residents. In addition, the processing equipment for dumping rivers and oceans requires high-speed processing corresponding to the amount of emissions, the equipment cost is high, the operation is not easy, and the maintenance is complicated, making it difficult for general livestock farmers to use. there were. From this point of view, although there is demand for livestock, it is not possible to increase the number of breeding and fattening heads in terms of manure treatment, so low-cost, high-speed treatment is possible, and maintenance of equipment or sludge liquid is easy. The advent of a method was desired.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and one object of the present invention is to treat sludge liquid which is capable of mass processing by continuous operation of the apparatus at low cost and which is easy to maintain. It is an object of the present invention to provide a system, a method for deodorizing sludge, and a method for treating animal raw urine. Another object of the present invention is to continuously separate the solid-liquid of the sludge liquid subjected to the colloid sedimentation treatment, thereby enabling continuous operation of the entire system in cooperation with an apparatus in a process connected before and after. An object of the present invention is to provide a centrifugal separator for treating sludge.

[0005]

In order to achieve the above-mentioned object, the present invention relates to a sealed first reaction tank 16 in which a sludge liquid is charged and a sludge liquid part L1 and a gas part G are formed inside. A first negative pressure reactor 13 having an adjusting cylinder 20 with an open / close valve 28 having one end open to the atmosphere as an open hole 19 and the other end having a plurality of holes 54 perforated therein and disposed in the sludge liquid part L1. And a deodorizing device 12 including a negative pressure generating means 18 communicating with the gas portion G of the first reaction tank 16 and generating a negative pressure in the first reaction tank, and communicating with an inner bottom of the first reaction tank 16. Centrifugal separator 14 for centrifuging sludge liquid into solid and liquid components
The centrifugal separator 14 has a centrifugal rotary tank 22 having sludge liquid introduced therein and having a plurality of holes 23 formed in a peripheral side wall.
And a discharge port 24 provided at the inner bottom of the centrifugal rotary tank for continuously discharging the solid content of the sludge liquid.

The sludge treatment system includes a first gas washing tank 34 for pickling acid between the first negative pressure reactor 13 of the deodorizing device 12 and the negative pressure generating means 18 so as to perform a negative pressure suction operation.
And a second air-cleaning tank 36 for alkaline cleaning.

Further, the sludge liquid treatment system has a sealed first reaction tank 16 in which the sludge liquid is introduced and in which a sludge liquid portion L1 and a gas portion G are formed, and an open hole 19 at one end side to the atmosphere. A first negative pressure reactor 13 having an adjusting cylinder 20 with an on-off valve 28 which is opened and the other end of which is formed with a plurality of holes 54 is disposed in a sludge liquid portion;
A deodorizing device 12 including a negative pressure generating means 18 communicating with the gas part G of No. 6 and generating a negative pressure in the first reaction tank 16;
A centrifugal separator 14 that communicates with the inner bottom of the reaction tank 16 to centrifuge the sludge liquid into a solid component and a liquid component. A centrifugal rotary tank 22 having a hole formed therein, and an outlet 24 provided at the inner bottom of the centrifugal rotary tank to continuously discharge the solid content of the sludge liquid;
The centrifugal rotating tank 22 is housed in a double cylindrical shape in the outer cylinder 72 and is provided rotatably around the longitudinal direction,
The knitted filter cloths 92 may be circumferentially arranged on the inner wall of the centrifugal rotary tank 22.

Further, a spacer net 94 may be narrowly disposed between the inner wall of the centrifugal rotary tank 22 and the filter cloth 92.

Further, the sludge liquid is raw urine of an animal or the like, and the centrifugal separator 14 is charged with the centrifuged liquid L2 separated by the centrifugal separator to form a liquid part and a gas part G therein. A closed second reaction tank 96 and an open hole 19 at one end.
The on-off valve 28 which is opened to the atmosphere and the other end of which is provided with a plurality of holes 54 is disposed in the centrifugal liquid L2.
A second negative pressure reactor 102 having a second adjusting cylinder 98 and an ammonia removing chemical liquid unit 100 may be connected.

Further, a stirring means (106) for stirring the liquid portion in the second reaction tank 96 may be provided.

Further, the second reaction tank 96 may be connected to an adsorption column device 118 for decolorizing the liquid in the second reaction tank.

The communication between the gas part G in the second reaction tank 96 and the negative pressure generating means 18 or the communication between the gas part G in the first reaction tank 16 and the negative pressure generating means 18 is selectively switchably connected. The communication switching means (114) may be provided.

Further, according to the present invention, a sludge liquid is introduced, and a sludge liquid portion L1 and a gas portion G are formed inside the hermetically sealed first portion.
The negative pressure generating means 18 is connected to the gas part G of the reaction tank 16 to generate a negative pressure.
An adjustment cylinder 20 which is open to the atmosphere and the other end of which is provided with a plurality of holes 54 is disposed in the sludge liquid part L1 as 9
And an opening / closing valve mechanism (28) for opening and closing the opening 19 in the adjusting cylinder 20. By opening and closing the opening 19 of the adjusting cylinder 20, a negative pressure is generated while taking in air into the sludge liquid from the hole 54 of the adjusting cylinder. The method comprises a method for deodorizing a sludge liquid by separating an odor component from the sludge liquid and raising the gas into the gas part while maintaining the negative pressure of the gas portion G of the first reaction tank 16 by the means 18 within a predetermined range.

Further, according to the present invention, a negative pressure generating means is provided in the gas part G of the sealed first reaction tank 16 in which the urine fluid part (L1) and the gas part G are formed by charging the animal raw urine. A negative pressure is generated by communicating the odor component with the urine fluid while the negative pressure of the gas portion G of the first reaction tank 16 is maintained within a predetermined range by the negative pressure generating means while taking in air into the urine fluid portion. Part (L
1) A first step of separating from the inside, rising into the gas part and sucking and removing, a second step of introducing a chemical solution that causes sediment in the urine fluid in the first reaction tank 16, and a sedimentation in the first reaction tank The method comprises a method of treating animal raw urine, which includes a third step of solid-liquid separation of urine fluid containing solid matter, and a fourth step of introducing a chemical solution for removing ammonia into the liquid separated in the third step.

The method may further include a step of passing the liquid from which ammonia has been removed in the fourth step through the adsorption column (118).

Further, the present invention is a centrifugal separator for introducing a flocculant into which a sedimentation flocculant is charged and introducing a colloidal precipitate, and centrifuging the sludge liquid into a solid content and a liquid content. A centrifugal rotary tank that is arranged in a double cylinder shape with a gap between the outer cylinder and has a plurality of holes formed in the peripheral side wall and is rotatably provided around the longitudinal direction and introduces sludge liquid into the inside; A sludge liquid treatment centrifugal separator provided at the inner bottom of the centrifugal rotary tank and having a discharge port capable of continuously discharging solid matter of the condensed sludge liquid.

The knitted filter cloth may be circumferentially arranged on the inner wall of the centrifugal rotary tank.

A spacer net may be narrowly disposed between the inner wall of the centrifugal rotary tank and the filter cloth.

[0019]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 3
Is a sludge liquid treatment system 1 according to a first embodiment of the present invention.
In the figure, the sludge treatment system 10a includes a deodorizing device 12 and a centrifugal separator 14. The deodorizing device 12 has a first reaction device 13 and negative pressure generating means 18. Further, the first reaction device 13 includes a first reaction tank 16 and an adjusting cylinder 20. In the embodiment, the sludge liquid treatment system 10a is a system for treating animal raw urine, for example, animal manure such as cows and pigs. First reaction tank 1 via valve 28 and pressure pump 30
It is thrown into 6.

In the embodiment, in the sludge liquid treatment system, the sludge liquid L as animal manure is stored for a required time in the raw urine tank 26, and is separated to a certain extent into a solid component and a liquid component. In addition, the liquid further contains a large amount of floc and particulate solids. Then, raw urine as a liquid portion in the raw urine tank 26 is introduced into the first reaction tank 16. In raw urine, mainly BOD (biochemical oxygen demand),
COD (chemical oxygen demand), ammonia (NH3)
Component, phosphoric acid (H3PO4) component and a colloid. And about these processes, BOD,
It is necessary to make the COD value equal to or lower than the reference value, and furthermore, when releasing or discharging the gas or liquid, it is necessary not to discharge a bad smell and not to release a colored substance irrespective of gas or liquid. The raw urine contains solid, liquid and gaseous components, which are allowed to be released only after the treatment that satisfies these requirements.

In FIG. 1, the first reaction tank 16 is made of stainless steel such as SUS305. Not limited to this, an epoxy resin may be applied to the surface of the steel sheet so that it does not easily react with ammonia, etc., and the surface may be coated with Teflon. You may comprise. The first reaction tank 16 is formed of a hollow cylindrical tank having a capacity of, for example, about 300 liters or 500 liters. The upper surface is covered with a sealing lid 15 and the inside is sealed. As shown in the figure, the liquid part in the raw urine tank is charged into the first reaction tank 16 by the pressure pump 30, and a sludge liquid part L 1 and a gas part G are formed inside the first reaction tank 16. You. A negative pressure pump 32 composed of a vacuum pump as a negative pressure generating means 18 described later is connected to the gas portion G of the first reaction tank 16 so as to be capable of driving under negative pressure. A negative pressure is generated in the first reaction tank 16 including the section G.

An adjusting cylinder 20 is provided in the first reaction tank 16. One end of the adjusting cylinder 20 is protruded upward from the closed lid 15 of the first reaction tank 16, and the leading end opening thereof is opened to the atmosphere as an open hole 19. The other end of the adjusting cylinder 20 is disposed in the first reaction tank 16, and the tip end of the adjusting cylinder 20, that is, the lower end of the adjusting cylinder 20 is bent into an L-shape to be slightly lower than the inner bottom 16 a of the first reaction tank 16. It is arranged above. Thus, the L-shaped lower end side of the adjusting cylinder 20 is in a state of being settled in the sludge liquid, and the L
A plurality of holes 54 are drilled in the letter-shaped horizontal tube portion. An electromagnetic valve 42 as an on-off valve is interposed at the upper end side of the adjusting cylinder 20, that is, near the atmosphere opening, and by opening and closing the electromagnetic valve 42, the inside of the adjusting cylinder 20 is opened through the opening 19. And is cut off.

The negative pressure suction into the sludge liquid portion L1 of the atmosphere from the hole 54 of the L-shaped horizontal tube portion of the adjusting cylinder 20 causes air bubbles to be discharged into the sludge liquid portion L1 and to be present in the sludge liquid. The gas component accompanied by the foul odor is dissolved in the bubbles of air to rise in the sludge liquid and to be released to the gas part G. Then, the gas in the gas portion G is suctioned negatively by the negative pressure generating means 18 to remove odorous components in the sludge liquid that accompany odor. The solubility of the gas is related to the pressure. Under high pressure, the solubility in the sludge liquid is high, and at low pressure, the solubility in the sludge liquid is low. Therefore, when the inside of the first reaction tank 16 is in a negative pressure state as in the present invention, the solubility of the gas, that is, the odor component, in the sludge liquid is low, and therefore, the gas or the odor component is sucked and discharged from the hole 54 of the adjusting cylinder 20 into the sludge liquid. The air bubbles rise to the gaseous portion G above the first reaction tank 16 by buoyancy while taking in the odor components not dissolved in such sludge liquid.

In general, the malodor of animal manure is an intense odor component including not only ammonia but also a mercaptan-based volatile organic acid odor component. Therefore, ammonia and other malodorous components are removed by the deodorizing step using the first negative pressure reactor and the negative pressure generating means. Such first
The deodorizing action by the negative pressure suction action by the negative pressure reaction device 13 and the negative pressure generating means 18 is effectively applied not only to animal manure but also to other life, treatment of industrial wastewater and other sludge liquid. The power supply load is reduced by the system configuration based on the negative pressure suction action, which contributes to a reduction in power cost.

In the embodiment, a stirring blade device 55 is provided in the first reaction tank 16. A motor 56 is attached to the center of the closed lid 15 of the first reaction tank 16, and a rotating shaft 58 connected to a rotating shaft of the motor 56 is suspended downward and suspended in the sludge liquid. It is arranged so that the tip may be inserted. Stirring blades 60 made of a cross-shaped round bar are fixed to the rotary shaft 58 at two places, and the driving of the motor 56 rotates the stirring blades 60, thereby causing the sludge liquid to flow slowly and smoothly. Stir and circulate to mix. The rotation speed of the motor 56 needs to be slow, and is set, for example, in a range of about 60 rpm to about 200 rpm. The stirring blade device 55 directly stirs and mixes the sludge solution, but functions as a means for promoting the odor component uptake. The uptake of the undissolved odor component in the sludge solution L is performed on the surface of the sludge solution. The negative pressure is not applied only to the portion, and the negative pressure is generated uniformly throughout the lower, middle and upper layers in the sludge liquid.

That is, the stirring blade device 55 serving as the stirring means functions as an odor component intake means, and the air drawn into the sludge liquid L by the negative pressure causes the action of taking in the undissolved odor component to the sludge liquid. By generating a water flow which is stirred at a low speed in this way, not only the negative pressure suction of only the surface of the sludge liquid, but also the action of taking in the odor component in the entire sludge liquid portion L Is generated, and it becomes possible to efficiently suck and discharge the odor component causing the bad odor. In this way, the uptake of odorous components throughout the sludge solution is promoted, so that the odorous components can be collected with high efficiency, so that the intake and collection time corresponding to the amount of air sucked is greatly reduced and the collection and capture efficiency is improved. Will be improved. Therefore, with a simple structure, the size of the apparatus can be reduced, and the sludge treatment capacity can be improved.

A chemical solution unit 62 is communicated with the closed lid 15 of the first reaction tank 16, and a required amount of the sedimentation flocculant corresponding to the amount of urine forming the sludge liquid part L 1 in the first reaction tank 16. Is charged into the sludge liquid L1. The flocculant is, for example, an aluminum-based flocculant such as aluminum sulfate (trade name, sulfate band) or aluminum chloride (including liquid and solid), iron (III) sulfate, iron (III) chloride (trade name, Taikifloc polyiron) Iron-based flocculants and other polymer flocculants are used. The precipitating flocculant as these chemicals is supplied to the first reaction tank 1
6, the BOD substance, the COD substance, and the colloid in the sludge liquid are coagulated and settled to form a colloid in the inner bottom portion 16a of the first reaction tank 16, thereby causing sedimentation. Any other agent may be used as the precipitation flocculant. In this way, by performing the precipitation action simultaneously with the removal of the malodorous component, it is possible to remove the odorous gas accompanying the malodor and to remove the BOD and COD of the living environment standard by the precipitation. Further, by removing the offensive odor component first in the treatment of the sludge liquid, the offensive odor does not remain in the next step, and the odor component can be reliably removed.

The introduction pipe 6 is inserted into the bottom wall 17 of the first reaction tank 16.
The liquid containing the precipitated solids precipitated on the inner bottom of the first reaction tank 16 is centrifuged through the introduction pipe 64 via a solenoid valve 66 and a pump 68 interposed in the introduction pipe 64. It is introduced into the device 14 side.

In the embodiment, two first and second air-washing tanks 34 and 36 are provided between the first reaction tank 16 and the negative pressure pump 32.
The first reaction tank 16 and the first air-washing tank 34 are communicated with each other by a first negative-pressure pipe 33, and a second negative-pressure pipe is provided between the first air-washing tank 34 and the second air-washing tank 36. 35, and the second air-washing tank 36 and the negative pressure pump 32
They are connected by a negative pressure tube 37. The upper surfaces of the first air-washing tank 34 and the second air-washing tank 36 are covered, and the insides thereof are sealed. First in the embodiment,
The second air-washing tanks 34 and 36 are formed of, for example, acid-resistant stainless steel. A corrosion-resistant synthetic resin such as polyethylene may be used. One end opening side of the first negative pressure tube 33 communicates with the gas portion G of the first reaction tank 16 and the first negative pressure tube 3
The other end opening side of 3 is disposed in a chemical solution for acid cleaning of the first gas cleaning tank 34.

Further, one end opening side of the second negative pressure tube 35 is
The other end opening side is communicated with the gas portion G of the first air-washing tank 34, and is disposed in a chemical solution for alkali treatment in the second air-washing tank 36. Further, one end opening side of the third negative pressure pipe 37 is connected to the gas portion G of the second air-washing tank 36, and the other end opening side is connected to the negative pressure pump 32. An electromagnetic valve 38 is interposed and connected to an intermediate position of the first negative pressure pipe 33, and an electromagnetic valve 40 is also connected to an intermediate position of the third negative pressure pipe 37.
Are provided in communication with each other.

Then, a negative pressure pump 3 comprising a vacuum pump
The first, second, and third negative pressure pipes 33, 3 are driven by the second negative pressure drive.
Negative pressure is applied to the gas portions of the second air-washing tank 36 and the first air-washing tank 34 via the air purifiers 5 and 37, so that the negative pressure is applied to the liquid part of each of the air-washing tanks 34 and 36, and the gas in the preceding process is reduced. The parts of the gas are suctioned negatively into their liquid parts and released. The first and second air-washing tanks 34 and 36 may be small-capacity tanks of, for example, about 20 liters or 30 liters, and achieve the miniaturization of the whole apparatus, space saving, and reduction of power load. Due to the air-washing action of these first and second air-washing tanks,
Ammonia and malodorous organic acid odor components are almost completely removed to the extent that they can be released to the atmosphere.

An acid chemical for acid cleaning is previously supplied to the first gas cleaning tank 34, and a chemical for alkaline cleaning is supplied to the second gas cleaning tank 36. For example, diluted sulfuric acid is stored in the first air-washing tank 34 in advance. The odor components floated in the gas portion G by air bubbles from the sludge liquid portion L1 of the first reaction tank are mainly ammonia and organic acid volatile components, and these components are introduced into the first gas washing tank 34 by the first negative pressure pipe 33. Will be introduced. Then, it reacts with the diluted sulfuric acid in the first gas washing tank 34 to remove the ammonia basic component. That is, the dilute sulfuric acid and ammonia react to produce ammonium sulfate, which precipitates at the bottom. Since sulfuric acid reacts with ammonia at about 35% concentration to precipitate crystals, it is preferable that the sulfuric acid concentration is about this level. However, it is not limited to this concentration. Ammonia is removed from the gas floated from the dilute sulfuric acid in the first gas-washing tank 34 to the gas portion, and a large amount of mercaptan-type organic acid volatile components is present, accompanied by an unpleasant odor.

In the embodiment, sodium carbonate, calcium hydroxide and other alkaline chemicals for alkali cleaning are charged into the second air-washing tank 36. The gas component which is suctioned negatively into the second gas-washing tank 36 after the acid cleaning by the first gas-washing tank and floated in the gas part may include an organic acid component and hydrogen sulfide, and these are alkaline. It is neutralized with a chemical and removed. As a result, the third
The gas coming out through the negative pressure tube 37 is completely odorless after passing through the acid washing and alkali washing steps. Although not shown, a gas phase column of activated carbon may be provided and connected to the negative pressure pump 32, and the gas discharged from the negative pressure pump 32 may be passed through the column to remove neutral odor components. . Note that the first negative pressure reactor is followed by the first negative pressure reactor as in the embodiment.
It is necessary to connect an acid washing step as a gas washing tank, and then connect an alkali washing step as a second gas washing tank. If the alkaline rinsing step is performed first, the acidic odor component coming out of the first negative pressure reactor is neutralized and remains in the liquid in the alkaline cleaning step, and this remains as an odor component so that the odor cannot be removed. become.

As described above, the odor component in the sludge liquid is removed while the sludge liquid in the closed tank is sucked by the negative pressure suction method through the negative pressure generating means 18 and, at the same time, the nitrogen in the first reaction tank 16 is removed by air. Can be taken into the bubble and floated,
Therefore, the total nitrogen component in the gas finally recovered from the negative pressure tank 32 can be significantly reduced.

On the other hand, in FIG. 1 and FIG.
A gas pressure maintaining device 43 for maintaining the negative pressure in the gas portion G constant. In the embodiment, the gas part pressure maintaining device 43 includes a control part 44 and a gas part sensor 4 that detects the pressure in the first reaction tank 16 and supplies an electric signal to the control part 44.
6, an atmosphere opening solenoid valve 42 electrically connected to a control unit 44, and a negative pressure pump 32 for driving and stopping the motor in response to a command signal from the control unit 44. The control unit 44 compares an electric signal corresponding to the detected pressure in the gas part G of the first reaction tank supplied from the gas part sensor 46 with a set value corresponding to the set negative pressure, and judges a deviation signal thereof. A comparison unit 48 that supplies the signal to the control unit 50 and a determination unit 50 that determines whether or not to open or close the solenoid valve based on the signal deviation supplied from the comparison unit.

Thus, for example, if the negative pressure is too high than the set negative pressure, the solenoid valve 42 connected to the control unit 44 is kept open while the negative pressure pump 32 is driven, and the first reaction tank 16 is kept open. The sludge liquid is compressed by the negative pressure to the gas part G in the inside and the air is taken in.
When the internal pressure increases, a negative pressure is applied to the gas portion G while closing the solenoid valve 42. With this, air is negatively sucked from the atmosphere into the sludge portion L while always applying the set negative pressure to the gas portion G of the first reaction tank 16,
The bubbles of air are discharged from the holes 54 of the adjusting cylinder 20, and the undissolved odor components and the nitrogen components are taken into the bubbles and rise to the gas portion G. Note that the gas pressure maintaining device 43 may be configured such that a timer mechanism is connected to the electromagnetic valve 42 so that the opening and closing operation of the electromagnetic valve is performed at predetermined time intervals while a negative pressure is constantly applied by the negative pressure pump.

The pressure in the first reaction tank 16 is controlled by, for example, the first and second air-washing tanks 34 and 36, the first, second and third negative pressure pipes 3.
It is preferable to maintain the pressure in 3, 35, 37 at about 1 hectopascal, that is, about 0.001 atm. In this case, the negative pressure pump 32 is set to generate a negative pressure of about 1 atm. Further, the volume ratio between the amount of air sucked from the inside of the adjusting cylinder 20 and the sludge liquid is, for example, 32.
00: 1 is preferred. Thereby, the ammonia component in the sludge liquid L is largely removed. In addition, the efficiency of removing the odor component is extremely good, so that the processing apparatus can be significantly reduced in size.
In addition, the combination of a plurality of negative pressure tubes and an air-washing tank ensures the deodorization of the sludge solution and removes harmful substances such as sulfuric acid or nitric acid. Material removal can be performed at the same time. For example, when the capacity of the first reaction tank is 3200 liters, it takes about 5 hours by a large pump to send air by forcible pressure of air into the first reaction tank. It has been confirmed that the odor removal step is completed in about 20 minutes at 0.001 atm.

The centrifugal separator 14 has a centrifugal rotary tank 22 and a discharge port 24 provided at the inner bottom of the centrifugal rotary tank 22. In FIG. 2, the centrifugal rotary tank 22 is formed of a rotary drum body, and has a plurality of holes 23 formed in a side wall thereof.
Then, the entire centrifugal rotation tank 22 rotates through a driving device 70 provided near the centrifugal rotation tank 22. The centrifugal rotary tank 22 is made of stainless steel or other high corrosion-resistant material having excellent corrosion resistance, is formed in a cylindrical shape, and the bottom side is tapered downward in a funnel shape, and a discharge port 24 is provided at the center of the bottom. I have.

In FIG. 2, an outer cylinder 72 having a canopy 71 fitted therein and hermetically sealed inside is supported by a support base 76. The centrifugal rotary tank 22 is arranged inside the outer cylinder 72 so as to form a double cylinder, and the centrifugal rotary tank 22 is rotatably provided about a longitudinal direction. On the other hand, an introduction pipe 64 penetrates downward from the upper surface side so as to penetrate the outer cylinder 72, the canopy 17 of the centrifugal rotation tank, and the upper surface plate 21, and penetrates the central portion thereof to open the lower end thereof into the centrifugal rotation tank 22. It is arranged. Thereby, the introduction pipe 64 and the inside of the centrifugal rotary tank 22 communicate with each other. A gap is formed between the centrifugal rotation tank 22 and the outer cylinder 72, and the liquid component discharged by the centrifugal force from the hole 23 formed in the peripheral wall of the centrifugal rotation tank 22 is communicated with the bottom plate 73 of the outer cylinder 72. The liquid is discharged from the liquid discharge pipe 74 to another processing step.

In FIG. 2, on the inner wall of the centrifugal rotary tank 22, a knitted and knitted filter cloth 92 is circumferentially arranged in a hollow cylindrical shape along the inner wall. Thereby, the first
At the time when the liquid (colloidal liquid) containing the precipitated solid in the reaction tank 16 starts to be poured into the centrifugal rotation tank 22, the solid precipitated in the inner bottom portion 16a of the first reaction tank 16 is efficiently filtered. The liquid component adheres to the inner surface side of the cloth 92, and the liquid component passes through the filter cloth 92 and is discharged from the hole 23 of the centrifugal rotary tank 22 to the gap between the outer cylinder 72 and the centrifugal rotary tank 22. It flows down to the pipe 74.

The filter cloth 92 is formed, for example, by weaving fibers made of polypropylene or the like, and its mesh holes form holes of about 50 microns.
Mesh holes can range from 1 micron to 200 microns if possible
A micron is selected. From the standpoint of the separation efficiency between the solid part and the liquid part, those having a size of about 50 microns are more preferable. The filter cloth 92 is formed by weaving the fibers in this way, and therefore freely and flexibly expands and contracts in response to a change in the rotation speed when the centrifugal rotation tank 22 rotates. The mesh holes also change correspondingly, thereby effectively preventing clogging of solids and washing down the solids with liquid as the filter cloth 92 expands and contracts during rotation. It can be performed effectively.

In the embodiment, a spacer net 94 is interposed between the inner wall of the centrifugal rotary tank 22 and the filter cloth 92. In this embodiment, the spacer net 94 is made of stainless steel, and is formed of a cylindrical metal net formed by vertically and horizontally knitting corrugated stainless steel wires having corrugated shapes. Accordingly, many gaps are formed between the filter cloth 92 and the spacer net 94, and between the spacer net 94 and the inner wall of the centrifugal rotary tank 22. Thereby, the filter cloth 92 does not directly contact the inner wall of the centrifugal rotary tank 22 when the centrifugal rotary tank 22 rotates, so that clogging does not easily occur, and the solid component is easily moved downward. The continuous separation operation of the sludge liquid can be executed by washing it away.
That is, the solid content of the sludge liquid that has accumulated in the inner bottom of the first reaction tank 16 flows into the centrifugal rotation tank 22 and adheres to the surface of the filter cloth 92, but gradually the sludge liquid in the first reaction tank 16 gradually increases. When the inflow of the liquid component increases, the solid component adhering to the inner wall side of the centrifugal rotary tank 22 flows down by the centrifugal rotating force so as to be washed down and efficiently flows down from the outlet 24, while the filter cloth 92. From the mesh hole through the hole 23 in the peripheral wall of the centrifugal rotary tank 22 to the gap side. The liquid component is in a state of being atomized and suspended in a mist state in the high-speed rotating centrifugal rotation tank, and does not directly flow downward along the inner wall of the centrifugal rotation tank, but is discharged from the hole 23 of the peripheral wall of the centrifugal rotation tank. It is discharged to the gap side with the cylinder 72.

On the other hand, a hollow fixed cylinder 78 having an open upper and lower surface penetrating the bottom of the centrifugal rotary tank 22 and the bottom of the outer cylinder 72 is attached. The upper opening of the fixed cylinder 78 is the discharge port 24. The fixed cylinder 78 penetrates through the centrifugal rotary tank 22 and the bottom of the outer cylinder 72 and is vertically arranged vertically downward. Therefore, the solid content discharged from the inside of the centrifugal rotary tank is directly discharged to the outside from the discharge port 24. The discharge port 24 may be configured as a simple discharge hole provided at the bottom of the centrifugal rotary tank 22, and the position to be set may be any position. From this outlet, the solid content after centrifugation continuously flows down along the inner wall of the centrifugal rotary tank. That is, the solid content mainly separated by the centrifugal separation through the outlet is discharged in a continuous flowing state. The lower side of the fixed cylinder 78 is vertically fixed by a gantry 90 via a fixing bracket 79, and the upper side of the fixed cylinder 78 is disposed at a position below the outer cylinder 72 and at the center of the bottom surface of the centrifugal rotary tank 22. It is installed to be. In FIG. 2, a rotating cylinder 80 is provided on the outer periphery of the fixed cylinder 78 via two bearings vertically so as to be supported by the fixed cylinder 78. The rotating cylinder 80 is rotatable about a longitudinal axis of the fixed cylinder 78. The rotating cylinder 80 is attached through a mounting hole provided in the center of the outer cylinder 72,
Bearing 8 provided on the periphery of the mounting hole at the bottom of outer cylinder 72
2 allows the outer cylinder 72 to rotate with respect to the bottom plate 73.

An L-shaped flange portion is formed from the upper end side of the rotary cylinder 80, and is fixed to the bottom wall side of the centrifugal rotary tank 22 via this flange portion. As a result, the rotary cylinder 80 and the centrifugal rotary tank 22 rotate integrally. Further, a donut disk-shaped pulley plate 84 is fixed to the outer periphery of the rotary cylinder 80 in the figure. A plurality of belt grooves are engraved on the outer periphery of the pulley plate 84, and a drive motor 8 mounted near the pulley plate 84 is provided.
The belt is adjusted in the belt groove of the pulley 85 connected to the pulley 6, whereby the driving force of the drive motor 86 is directly transmitted to the centrifugal rotation tank 22, and the centrifugal rotation tank 2 is rotated at the set rotation speed.
2 rotates. Here, the fixing bracket 79 of the gantry 90
As a result, the fixed cylinder 78 moves the discharge port 24 at the upper end to the centrifugal rotation tank 22.
The centrifugal rotation tank 22 is driven by a drive motor in this state, and rotates around the vertical direction while the entire centrifugal rotation tank 22 is supported by the fixed cylinder 78.

As described above, the centrifugal separator 14 is provided in the centrifugal rotary tank 22 in which the sludge liquid is introduced and a plurality of holes 23 are formed in the peripheral side wall, and the inner bottom of the centrifugal rotary tank 22. And a discharge port 24, whereby the solid matter having a higher specific gravity attached to the surface of the filter cloth 92 due to the liquid component that is delayed by the centrifugal rotation of the centrifugal rotation tank is removed. During the rotation, the liquid component is discharged from the peripheral wall hole 23 of the centrifugal rotary tank while being discharged from the discharge port 24, and the solid component and the liquid component are separated. Therefore,
The solid-liquid separation after removing the odor components with high efficiency while continuously operating the system will be realized. A receiving frame 91 is provided below the lower end of the fixed cylinder 78, and solid components collected by, for example, a belt conveyor (not shown) are sent to the next processing step.

The centrifugal separator 14 is unique in its own structure. For example, when only a sedimentation flocculation tank is used and milk waste liquid or sludge liquid as other wastewater is charged into the tank and a sedimentation flocculant such as aluminum sulfate is charged therein, colloid precipitation occurs. The liquid containing the precipitate is introduced into the centrifugal separator 14 having the same configuration as the above-described centrifugal separator, and the milk waste liquid can be centrifuged into a solid component and a liquid component. The filter cloth 92 and the spacer net 94 in the centrifugal rotary tank 22 are the same as those described above, whereby even during rotation of the centrifugal rotary tank, solids are continuously discharged from the discharge port 24, and centrifugal separation is performed. It is possible to operate continuously without interrupting the work and improve the processing efficiency.Also, the sedimentation / aggregation step connected before and after this centrifugal separator or the operation in the alkali treatment step can be performed continuously, and the whole system can be operated. Processing efficiency can be greatly improved.

Next, the operation of the sludge liquid treatment system according to the first embodiment of the present invention will be described.
The sludge liquid as animal manure is supplied from the raw urine tank 26 into the first reaction tank 16 through the first reaction tank 16. The set pressure of the gas pressure maintaining device 43 is set to a negative pressure of, for example, about 0.001 atm. A precipitate in the form of a precipitate. Then, the stirring blade 60 of the stirring blade device 55 as a stirring means is rotated to slowly stir and mix the sludge liquid in the first reaction tank 16. The negative pressure pump 32 is driven, and the first and second air purifying tanks 34 and 36 and the first, second,
A negative pressure is applied to the gas portion G in the first reaction tank 16 via the third negative pressure pipes 33, 35, 37. The on-off valve 28 is opened and closed while detecting the pressure by the pressure sensor 46 in the first reaction tank 16 to maintain the set pressure. At this time, the first pressure is higher than the set pressure.
When the pressure of the gas part in the reaction tank 16 is low, the solenoid valve 42
, The air is taken in, the air is taken in from the hole 54 of the adjusting cylinder 20, the air is sucked into the sludge liquid, and the odor component is taken out and released to the gas part G. When the internal pressure increases, the solenoid valve 42 is closed to perform a negative pressure action by the negative pressure pump 32 to maintain the internal pressure at a predetermined set pressure.

By the negative pressure suction action, the air is taken in from the open hole 19 and sucked and released from the hole 23 of the adjusting cylinder 20 into the sludge liquid portion L of the first reaction tank 16, and the air bubbles released at this time are released. Undissolved odor components such as ammonia and organic acid volatile odor components are taken in and floated to the gas part G as they are. Then, while being washed with acid in the first gas washing tank 34 and alkali-washed in the second gas washing tank 36, when it is sucked by the negative pressure pump 32, almost odorless gas is sucked. The components are removed. In particular, since the odor component is removed while taking in the atmosphere by the air stripping method, that is, the negative pressure suction method, the size of the apparatus can be significantly reduced and the odor component removal efficiency can be significantly improved as compared with the forced air feeding method. In addition, since the negative pressure suction is performed while gently diffusing and mixing by the stirring blade device 55, the incorporation of the undissolved odor component into the air by the negative pressure suction is not limited to the surface of the sludge liquid portion, but also to the sludge liquid portion. It can be performed up and down as a whole, and can achieve a significant improvement in odor component removal efficiency. Further, the nitrogen component can be removed with high efficiency by the negative pressure suction method. Gas cleaning can be performed by the first and second air-washing tank steps, and at the time of suction by a negative pressure pump, an odor component can be removed to the extent that it can be released to the atmosphere.

In the first reaction tank 16, a chemical liquid such as aluminum sulfate is injected by the chemical liquid unit 62, and colloidal solids are coagulated and settle on the inner bottom of the first reaction tank. Then, the colloidal liquid in the first reaction tank 16 is introduced into the centrifugal rotation tank 22 by the intermediate pump 68 while driving the drive motor 86 to rotate the centrifugal rotation tank 22 of the centrifugal separator 14 at, for example, about 750 rpm. At first, the colloidal precipitated solids enter the rotating centrifugal rotation tank 22 and immediately adhere to the inside of the filter cloth 92 by centrifugal force. 22
When it is introduced into the inside, the liquid in the liquid part is atomized into a mist by centrifugal rotation, while the liquid blown in the radial direction performs the action of washing away the sticking solids After passing through the filter cloth 92, it reaches the space between the outer cylinder 72 and the centrifugal rotary tank 22 via the spacer mesh body 94 and the hole 23 in the peripheral wall of the centrifugal rotary tank 22, and is further converged to the liquid discharge pipe 74 side to be liquid. Parts are collected.

The solids that have been washed away by the liquid introduced late from the introduction pipe 64 and flowed down along the inner wall of the centrifugal rotary tank 22 are discharged as is from the outlet 24 at the bottom and guided to the inner wall of the fixed cylinder 78. Then, it falls into the lower receiving frame 91 and is discharged to the next step by a belt conveyor or the like. The solid content discharged from the discharge port 24 has, for example, a water content of about 95%, so that fertilizer can be easily formed by drying the sky for about three days. The liquid component discharged by the discharge pipe 74 is once collected, and may be passed through a filter medium such as activated carbon, for example, by adjusting the pH of the liquid component by adding a neutralizing agent such as a chemical solution. As a result, a value below the reference value that does not affect the environment can be obtained and released to rivers and the like.

Here, deodorizing is performed by the deodorizing device 12 to remove bad smells, and at the same time, BOD, COD and colloids are precipitated by the coagulant supplied from the chemical solution unit 62, and the inside of the first reaction tank 16 The liquid component containing the precipitated solid is continuously discharged from the discharge port 24 from the bottom while being continuously separated into a liquid portion and a solid portion by the centrifugal separator 14. The system configuration based on the negative pressure suction system has a very simple structure and can be embodied with a small size, and can be easily manufactured and the manufacturing cost can be kept low. The filter cloth 92
It is possible to continuously operate the system only by periodic replacement, and to process a large amount of animal manure. This enables continuous treatment of sludge generated from animal manure and the like, and a very practical sludge treatment system 10a.
Is realized. In the embodiment, the treatment system for animal excrement has been described. However, the treatment system for sludge of the present invention may be applied to, for example, treatment of sewage drainage, industrial wastewater, and other sludge.

Next, a second embodiment of the sludge treatment system of the present invention will be described with reference to FIG. 4. The same components as those in the first embodiment will be designated by the same reference numerals, and detailed description thereof will be omitted. I do. In the second embodiment, the first reaction tank, the first and second air-washing tanks, the first to third cleaning tanks, except that the first reaction tank 16 is not provided with the stirring blade device 55 as stirring means.
The configuration of the negative pressure tube is the same as that of the first embodiment. The first reaction device 13 and the centrifugal separator 14 are connected in the same configuration as in the first embodiment. The configuration of the centrifugal separator 14 is the first
It is the same as the embodiment, and the detailed internal structure and the drive motor 86
The illustration of the drive mechanism and the like including is omitted.

In the present embodiment, the sludge liquid is raw urine of an animal or the like, and the sludge liquid treatment system 10b is connected to the centrifugal separator 14 and centrifuged by the centrifugal liquid L.
The second negative pressure reactor 102 having the second reaction tank 96 for introducing the second, the second adjusting cylinder 98 and the ammonia removing chemical liquid unit 100 is connected. Second negative pressure reactor 102
Has the same configuration as the first negative pressure reactor in the first embodiment, and has one end open to the atmosphere in the second reaction tank 96 and the other end having a plurality of holes perforated therein. A second adjusting cylinder 98 is provided near the bottom of the second reaction tank 96. An electromagnetic valve 104 as an on-off valve is interposed in the second adjustment cylinder. In this embodiment, the second
The substance introduced into the reaction tank is the centrifuged liquid L2 separated by the centrifugal separator 14.

In the second embodiment, a stirring blade device 106 having the same configuration as that of the first embodiment is attached to the second reaction tank. The operation of the stirring blade device is the same as in the first embodiment. In the second embodiment, only the liquid content excluding the solid content is introduced into the second reaction tank 96 by the centrifugal separator 14, so that the amount of the liquid supplied by the sensor or the like is not hindered by the colloid or the like. Can be reliably and easily detected.
In addition, the reaction with the ammonia removing chemical solution described in the first embodiment is efficiently promoted in a short time with respect to the entire centrifuged liquid L2. Centrifugal separator 14 and second reaction tank 9
6 is communicated via a second introduction pipe 108, and a pressure feed pump 110 is interposed in the second introduction pipe 108 as necessary.

The chemical unit 100 for removing ammonia is
Connected to the chemical solution inlet 112 provided in the second reaction tank, for example, a fixed amount of the chemical solution is injected at constant or indefinite time intervals or intermittently. In the embodiment, the chemical is an alkaline solution, and is preferably an alkaline solution that can be introduced into a centrifuged solution to obtain a pH value of about 11.5 to about 12. In the embodiment, for example, calcium hydroxide (C
a (OH) 2) is selected. Calcium hydroxide is more preferable because it causes a reaction at a low cost and automatically brings the pH value to about 11 to 12. Original urine tank 26
The raw urine contains a phosphoric acid component, and most of them are mixed into the raw urine as a colloidal phosphate. These solids are separated by the centrifugal separator 14 and about 60 percent of them are removed. The remaining centrifugal liquid L2 containing about 40% of liquid phosphoric acid is an acidic liquid, which is introduced into the second reaction tank 96 and reacts with calcium hydroxide, which is an alkaline solution, to ionize and react with calcium. And settle. That is, when calcium hydroxide is introduced into the centrifuged liquid L2 of the second reaction tank 96, the pH is changed to about 11.5 to about 12, and the centrifuged liquid contains phosphoric acid (H3PO4). From the solution, calcium phosphate (Ca (PO4) 2) is generated and almost completely precipitated, while ammonium ion (NH4 +) contained in the centrifuged liquid L2 is reacted with hydroxide to form NH4 ++ OH- → NH3 + H2O. The reaction takes place to produce gaseous ammonia (NH3). Therefore, the ammonia component is removed by reducing the pressure and sucking the solution. As a result, the centrifuged liquid L
In the state 2, the color having black turbidity changes to a slightly yellowish color, and can be volatilized as it is and released to the atmosphere.

Further, in this embodiment, the third negative pressure pipe 37
Is provided with a communication switching means. In the embodiment, the switching solenoid valve 114 is used as the communication switching means in the third negative pressure pipe 37.
And one end of the fourth negative pressure tube 116 is connected to the second
It is arranged in the gas part G in the reaction tank 96 and the other end is connected to the switching electromagnetic valve 114. The switching solenoid valve selectively switches between a state in which the gas in the second reaction tank 96 communicates with the negative pressure generating means 18 and a state in which the gas in the first reaction tank 16 communicates with the negative pressure generating means 18. Switch to
The negative pressure suction drive in the deodorizing step and the subsequent processing step can be processed by a common negative pressure pump, so that the overall configuration of the system can be reduced in size and the manufacturing cost can be reduced. In addition, the ammonia removal step can be performed while detecting the progress of the deodorization step performed in the initial stage, and power costs can be reduced.

A control unit (not shown) controls the switching solenoid valve 114
A solenoid valve 42 provided on the adjustment cylinder 20 on the first negative pressure reaction device 13 side, a second electromagnetic valve 104 provided on a second adjustment cylinder 98 on the second negative pressure reaction device 102 side, Pump 32
And the first negative pressure reactor 13
The switching solenoid valve 114 is operated while the deodorizing device 12 is being driven by the first and second air-washing tanks 34 and 36 and the negative pressure pump 32.
Selects the first flow path and drives the inside of the first reaction tank 16 under a negative pressure by the negative pressure pump 32, and appropriately selects the second reaction tank 9.
6 is switched to communicate the gas part in the negative pressure pump 32 and the centrifugal liquid L introduced into the second reaction tank 96 from the centrifugal separator 14 by the pressure pump 110.
2, the ammonia generated by the introduction of a chemical such as calcium hydroxide is suctioned at a negative pressure and discharged to the atmosphere.

Further, in this embodiment, the second reaction tank 96
Is connected to an adsorption column device 118 via a communication pipe. The adsorption column device 118 communicates a plurality of containers filled with a solid such as activated carbon, zeolite, alumina, silica gel or the like as a stationary phase therein, passes through the inside, decolorizes the colored centrifuged liquid L2, and further removes odor. Adsorb substance molecules. The liquid that has passed through the adsorption column device 118 is completely transparent and odorless, and satisfies the allowable value for river discharge.

The operation of the sludge liquid treatment system according to the second embodiment will be described. The operation is the same as that of the first embodiment except that the stirring blade device 55 is not attached to the first negative pressure reactor. Yes, the switching electromagnetic valve 114 is set on the first flow path side, and the deodorizing step by the deodorizing device 12 is performed.
That is, the negative pressure generating means (32) is connected to the gas portion G of the sealed first reaction tank 16 in which the urine fluid portion L1 and the gas portion G are formed by feeding the animal raw urine and the negative pressure. Is generated, and the odor component is separated from the urine fluid portion L2 while keeping the negative pressure of the gas portion of the first reaction tank 16 in the predetermined range by the negative pressure generating means while taking in air into the urine fluid portion L1. It is raised in the gas part G and removed by suction (first step). In the embodiment, the first and second air-washing tanks 34 and 36 are connected to the first negative pressure reactor 13.
And the negative pressure pump 32, removes ammonia by acid cleaning, and further precipitates and removes organic acid components and the like containing a strong malodor by alkali cleaning, and the deodorized gas is suctioned under negative pressure. Released to the atmosphere.

During or after the first step, a chemical solution such as aluminum sulfate as a urine sedimentation flocculant in the first reaction tank 16 is charged (second step) to cause precipitation. BOD, COD and other colloids are removed. As described above, in the case of animal raw urine with an odor, a deodorization step is performed in the first stage of the treatment, and solid substances are removed at the same time or thereafter. Difficulty is avoided.

Further, the urine containing the precipitated solid in the first reaction tank 16 is subjected to solid-liquid separation (third step). That is, the urine fluid is introduced into the centrifugal separator 14 having the same configuration as that of the first embodiment, and the centrifugal rotation tank 22 is rotated to continuously discharge the solid content from the discharge port 24 while simultaneously discharging the liquid component. The solid and the liquid are centrifuged by being separated and discharged from the liquid discharge pipe 74. The solid content is made into a fertilizer by an ordinary method. The discharged centrifugal separation liquid L2 is a colored liquid that is turbid blackish black. The centrifuged liquid L2 of the centrifugal separator 14 is supplied to the second solenoid valve 1 of the second negative pressure reactor 102.
With the valve 04 opened, it is introduced into the second reaction tank of the second negative pressure reactor 102 through a communication pipe via a pressure pump 110, and a centrifuged liquid part and a gas part are formed therein. Then, a required amount of an alkali hydroxide solution such as calcium hydroxide is charged by the ammonia removal chemical liquid unit 100 (fourth step), whereby the phosphate component is precipitated and removed, and ammonium ions and hydroxide ions are removed. Gaseous ammonia is generated by the reaction, and the negative pressure pump 32 passes from the depressurized gas portion of the second reaction tank 96 via the fourth negative pressure pipe.
, So that negative pressure is sucked. A significant amount of ammonia has been removed in the first step, the deodorization step, and
Ammonia is further sucked under reduced pressure in the second reaction tank 96 to further promote deodorization of the odor component, and is released to the atmosphere as it is. If necessary, the odor may be further deodorized by passing through a sulfuric acid tank and then discharged.

The liquid containing the phosphoric acid precipitate in the second reaction tank has a light yellow color due to the removal of ammonia.
Even in this state, cleaning is performed to such an extent that the reference value is satisfied and the water can be discharged. In this embodiment, the second reaction tank 96
When the liquid inside passes through the adsorption column device 118, the odor component and the colored component are adsorbed and removed, and the liquid is changed to a completely transparent liquid, and is ready to be discharged.

In this embodiment, the liquid centrifuged by the centrifugal separator is subjected to a chemical reaction by the second negative pressure reactor 102 to remove ammonia, thereby realizing a completed sludge treatment cycle. The system configuration can be reduced in size by using the common negative pressure pump 32, and the manufacturing cost can be reduced.

The sludge solution treatment system, sludge solution deodorization method, animal raw urine treatment method, and sludge solution treatment centrifugal separator according to the present invention are not limited to the embodiments, but are claimed in the following claims. Any modification may be made without departing from the essence of the invention described in (1). For example, the sludge treatment system and the sludge deodorization method may be applied not only to animal manure treatment but also to domestic wastewater, industrial or industrial wastewater, sewerage wastewater treatment, and the like.

[0065]

As described above, according to the sludge liquid treatment system of the present invention, the sealed first reaction tank in which the sludge liquid is charged and the sludge liquid part and the gas part are formed inside the sludge liquid. A first negative pressure reactor having an adjusting cylinder with an open / close valve having one end open to the atmosphere as an open hole and the other end having a plurality of holes perforated in a sludge liquid section; A deodorizing device including a negative pressure generating means communicating with the gas portion and generating a negative pressure in the first reaction tank; and a centrifugal separation of the sludge liquid into a solid content and a liquid content by communicating with the inner bottom of the first reaction tank. A centrifugal separator, wherein the centrifugal separator is provided with a sludge liquid introduced therein and a plurality of holes formed in a peripheral side wall, and a solid sludge liquid provided at an inner bottom portion of the centrifugal rotary tank. And a discharge port for continuous discharge of solids in the sludge liquid after the deodorization step. The liquid component is efficiently discharged from the discharge port, and the liquid component is discharged from the centrifugal rotary tank side, so that solid-liquid separation can be continuously performed.As a result, continuous treatment of the sludge liquid treatment system can be realized concretely and at low cost Can be manufactured,
Further, it is possible to reduce the size of the unit device of the system configuration, and it is possible to perform a large amount of processing in a short time by continuous operation, and it is possible to achieve an effect that maintenance is extremely simple.

Also, a first negative pressure reaction device of the deodorizing device, a first cleaning bath for acid cleaning so as to perform a negative pressure suction operation between the negative pressure generating means, and a second cleaning bath for alkali cleaning. Since the air tank is connected and connected, the ammonia odor component contained in the raw urine is removed in the first air-washing tank into which the acidic chemical liquid has been introduced, and the second air-washing apparatus into which the alkaline chemical liquid has been introduced. Since the organic acid volatile odor components are removed in the tank, the odor components can be reliably removed at the beginning of the treatment of the sludge liquid, the gas after removal can be released to the atmosphere, and the subsequent treatment of the sludge liquid can be continued. Realization can be contemplated.

Further, according to the sludge liquid treatment system of the present invention, the first reaction tank in which the sludge liquid is introduced and the sludge liquid portion and the gas portion are formed inside, and one end side is formed as an open hole. A first negative-pressure reactor having an adjusting cylinder with an on-off valve disposed in the sludge liquid portion and having the other end opened to the atmosphere and having a plurality of holes formed therein; and a first negative-pressure reactor communicating with the gas portion of the first reaction tank. A deodorizing device including a negative pressure generating means for generating a negative pressure in one reaction tank, and a centrifugal separator communicating with the inner bottom of the first reaction tank and centrifuging sludge liquid into solid and liquid components. Have
The centrifugal separator has a centrifugal rotary tank into which sludge liquid is introduced and a plurality of holes are formed in the peripheral side wall, and an outlet provided at the inner bottom of the centrifugal rotary tank to continuously discharge solid content of the sludge liquid, The centrifugal rotary tank is housed in a double cylindrical shape in the outer cylinder and is provided rotatably around the vertical direction, and the knitted filter cloth is circumferentially arranged on the inner wall of the centrifugal rotary tank. ,
The solid content in the sludge liquid after the deodorization process is continuously and efficiently discharged from the discharge port as it is, and the liquid content is discharged from the centrifugal rotary tank side, so that solid-liquid separation can be performed continuously, resulting in a sludge liquid treatment system. Can be realized at a low cost, and the unit of the system configuration can be reduced in size. In addition, continuous operation enables mass processing in a short time, and maintenance is extremely simple. is there. At the same time, the solid content precipitated in the first reaction tank after the deodorization step adheres to the filter cloth in the rotating centrifugal rotary tank, and the liquid content in the first reaction tank introduced later delays the solid content. The operation can be specifically realized. Further, the filter cloth is less clogged, the solid-liquid separation action is reliable, and the production cost can be kept low.

Further, since the spacer mesh is narrowly disposed between the inner wall of the rotary tank and the filter cloth, the filter cloth does not adhere to the inner wall side of the centrifugal rotary tank in a tight manner, and the centrifugal rotation is performed. As a result, the knitted stitch portion moves efficiently, so that clogging is reliably prevented, and a solid-liquid separation action is realized.

The sludge liquid is raw urine of an animal or the like, and the centrifugal separator is charged with the centrifuged liquid separated by the centrifugal separator, and the liquid part and the gas part are hermetically sealed. A second reaction tank having an open / close valve and an open / close valve having one end open to the atmosphere as an open hole and the other end having a plurality of holes perforated in the centrifugal separation liquid. Since the second negative pressure reactor equipped with the chemical solution unit is to be connected, ammonia is further removed by treating the acidic centrifuged liquid with an alkaline solution to further promote deodorization and decolorize. It is possible to further promote the conversion to a state where the liquid content after the centrifugation by the centrifugal separator can be discharged.

Further, by providing a stirring means for stirring the liquid portion in the second reaction tank, the action of taking in the undissolved odor components by the air drawn into the centrifugal liquid by the negative pressure is prevented. As a result, odor components are collected with high efficiency,
The collection time corresponding to the amount of air suction can be greatly reduced, and the collection efficiency can be improved. Also, with a simple structure, the device can be downsized and the processing capacity can be improved.

The second reaction tank is connected to an adsorption column device for decolorizing the liquid material in the second reaction tank, so that the inside of the container filled with a solid having an odor and dye molecule adsorption function is provided. To decolorize the colored centrifuged liquid, further adsorb odorant molecules, change the passed liquid into a completely transparent and odorless liquid, and complete the treatment.

Further, there is provided communication switching means for selectively and selectively switching the communication between the gas part in the second reaction tank and the negative pressure generating means or the communication between the gas part in the first reaction tank and the negative pressure generating means. Thus, the negative pressure suction drive in the deodorizing step and the subsequent processing step can be processed by the common negative pressure pump, so that the overall configuration of the system can be reduced in size and the manufacturing cost can be reduced. In addition, the ammonia removal step can be performed while detecting the progress of the deodorization step performed in the initial stage, and power costs can be reduced.

According to the method for deodorizing sludge liquid of the present invention, sludge liquid is supplied and negative pressure is generated in the gas part of the sealed first reaction tank in which the sludge liquid part and the gas part are formed. Means are communicated to generate a negative pressure, and the first reaction tank is provided with an adjusting cylinder having one end open to the atmosphere as an open hole and the other end having a plurality of holes formed in the sludge liquid portion. An opening / closing valve mechanism for opening and closing the opening hole in the adjusting cylinder is provided. By opening and closing the opening hole of the adjusting cylinder, air is introduced into the sludge liquid from the hole of the adjusting cylinder and the gas pressure of the first reaction tank is reduced by the negative pressure generating means. By separating the odor component from the sludge liquid and raising it into the gas part while maintaining the negative pressure in a predetermined range, the efficiency of taking in the undissolved odor component into the air by negative pressure suction is good, Sludge liquid deodorizing equipment can be miniaturized, and equipment cost Reducing the fine power costs, and the reduce the power load such as suction pump it is possible to simultaneously improve the deodorization efficiency per unit time.

Further, according to the method for treating animal raw urine of the present invention, the animal raw urine is charged and the urine fluid and the gas are negatively applied to the gas in the sealed first reaction tank in which the urine is formed. A negative pressure is generated by communicating the pressure generating means, and while the air is taken into the urine fluid part, the negative pressure of the gas part of the first reaction tank by the negative pressure generating means is maintained within a predetermined range, and the odor component is removed from the urine liquid part. A first step of being separated from the gas part, raised into the gas part, and suction-removed;
A second step of introducing a chemical solution that causes precipitation into the urine fluid in the first reaction vessel, a third step of solid-liquid separation of urine fluid containing precipitated solids in the first reaction vessel, and a third step. And a fourth step of introducing the ammonia-removing chemical solution into the separated liquid, so that the raw urine is deodorized by negative pressure suction treatment, and the solid matter after solid-liquid separation is collected and the liquid component is further separated. As a result of deodorization and decolorization, it is possible to specifically realize a processing cycle of animal raw urine and to specifically and continuously process solid, gas, and liquid components.

In the fourth step, the step of passing the liquid from which ammonia has been removed in the fourth step is passed through the adsorption column, so that the colored separation liquid is decolorized. By changing the liquid to a completely transparent and odorless liquid, it is possible to complete the treatment of animal urine.

Further, according to the centrifugal separator for treating sludge liquid of the present invention, a sedimentation flocculant is introduced, the sludge liquid which is colloidally precipitated is introduced, and the centrifugal separator separates the sludge liquid into a solid content and a liquid content. An outer cylinder and a sludge liquid are provided inside the outer cylinder in such a manner that the outer cylinder is disposed in a double cylinder shape with a gap between the outer cylinder and a plurality of holes formed in the peripheral side wall so as to be rotatable around the longitudinal direction. And a centrifugal rotary tank for introducing the, by having a discharge port provided at the inner bottom of the centrifugal rotary tank and capable of continuously discharging the solid content of the condensed sludge liquid, for example, in milk waste liquid and other sludge liquid The solids are continuously discharged from the outlet even during rotation of the centrifugal rotary tank, and the liquids are discharged from the centrifugal rotary tank side, so that solid-liquid separation can be performed continuously. And can be connected to the process before and after this device. Continuous operation of the device also becomes possible to be,
When the system is constructed, continuous operation of the whole system can be realized, and it is possible to greatly improve the whole processing time of sludge solution and the throughput per hour.

Further, the knitted filter cloth is arranged circumferentially on the inner wall of the centrifugal rotation tank of the centrifugal separator for sludge liquid treatment, so that the solid content in the sludge liquid is continuously discharged from the discharge port as it is. The liquid component is efficiently discharged and the liquid component is discharged from the centrifugal rotation tank side, so that solid-liquid separation can be continuously performed, and the continuous treatment of the sludge liquid treatment system can be concretely realized, and the solid component precipitated in the sedimentation flocculation tank The liquid adheres to the filter cloth in the centrifugal rotation tank where the liquid rotates, and the liquid in the sedimentation and coagulation tank, which is introduced later, performs the action of washing out this solid, and the solid can be discharged from the discharge port, and the centrifugal separation action can be performed. Can be realized.

Further, the filter cloth is arranged narrowly between the inner wall of the centrifugal rotary tank and the filter cloth of the centrifugal separator for sludge liquid treatment, so that the filter cloth is placed on the inner wall side of the centrifugal rotary tank. Therefore, the knitted stitch portion moves efficiently with the centrifugal rotation, so that clogging is reliably prevented, and the solid-liquid separation action is realized.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of the overall configuration of a sludge liquid treatment system according to a first embodiment of the present invention.

FIG. 2 is an enlarged vertical cross-sectional explanatory view of a centrifugal separator.

FIG. 3 is a block diagram of a gas pressure maintaining device.

FIG. 4 is an explanatory diagram of the entire configuration of a sludge liquid treatment system according to a second embodiment of the present invention.

[Explanation of symbols]

 10a, 10b Sludge liquid treatment system 12 Deodorizer 13 First negative pressure reactor 14 Centrifugal separator 16 First reaction tank 18 Negative pressure generating means 19 Opening hole 20 Adjusting cylinder 22 Centrifugal rotary tank 24 Discharge port 34 First air wash Tank 36 second air-washing tank 92 filter cloth 94 spacer net body 96 second reaction tank 98 second adjusting cylinder 100 ammonia removing chemical liquid unit 102 second negative pressure reactor 106 stirring blade device 114 switching electromagnetic valve 118 adsorption Column device

[Procedure amendment]

[Submission date] January 31, 2000 (200.1.3
1)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

Patent application title: Sludge liquid treatment system, sludge liquid deodorization method, and animal raw urine treatment method

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for treating sludge liquid, and more particularly to a system for treating animal manure and sewage and other sludge liquids, a method for deodorizing sludge liquid, and a method for treating animal raw urine.

[0002]

BACKGROUND OF THE INVENTION For domestic wastewater, sewage, and some factory wastewater, recent efforts have been made to protect the environment on a global environmental scale. Those wastewater and sewage that can be converted to fertilizer are converted to fertilizer, and the rest is often discharged directly into rivers. The fact is that rivers and oceans are purified after being purified. A large amount of cost is required for a purifying apparatus and a processing operation for purifying the substance to the extent that the standards can be cleared. On the other hand, there is a demand for the development of a practical device that can satisfy the urgent task of environmental protection.

[0003]

The treatment of sludge is particularly effective for cattle, pigs, and cattle in the livestock sector, mainly for breeding and fattening.
No effective measures have been taken for the treatment of chicken and other animal manure. For example, animal manure discharged in large quantities at livestock estates and the like is not able to catch up with solid fertilizer at all, and is temporarily stored in a large raw urine tank (storage tank) for the most part to infiltrate underground. For this reason, a bad smell was generated, which became a bad smell pollution to the local residents. In addition, the processing equipment for dumping rivers and oceans requires high-speed processing corresponding to the amount of emissions, the equipment cost is high, the operation is not easy, and the maintenance is complicated, making it difficult for general livestock farmers to use. there were. From this point of view, although there is demand for livestock, it is not possible to increase the number of breeding and fattening heads in terms of manure treatment, so low-cost, high-speed treatment is possible, and maintenance of equipment or sludge liquid is easy. The advent of a method was desired.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and one object of the present invention is to treat sludge liquid which is capable of mass processing by continuous operation of the apparatus at low cost and which is easy to maintain. It is an object of the present invention to provide a system, a method for deodorizing sludge, and a method for treating animal raw urine.

[0005]

In order to achieve the above-mentioned object, the present invention relates to a sealed first reaction tank 16 in which a sludge liquid is charged and a sludge liquid part L1 and a gas part G are formed inside. A first negative pressure reactor 13 having an adjusting cylinder 20 with an open / close valve 28 having one end open to the atmosphere as an open hole 19 and the other end having a plurality of holes 54 perforated therein and disposed in the sludge liquid part L1. And a deodorizing device 12 including a negative pressure generating means 18 communicating with the gas portion G of the first reaction tank 16 and generating a negative pressure in the first reaction tank, and communicating with an inner bottom of the first reaction tank 16. Centrifugal separator 14 for centrifuging sludge liquid into solid and liquid components
The centrifugal separator 14 has a centrifugal rotary tank 22 having sludge liquid introduced therein and having a plurality of holes 23 formed in a peripheral side wall.
And a discharge port 24 provided at the inner bottom of the centrifugal rotary tank for continuously discharging the solid content of the sludge liquid.

The sludge treatment system includes a first gas washing tank 34 for pickling acid between the first negative pressure reactor 13 of the deodorizing device 12 and the negative pressure generating means 18 so as to perform a negative pressure suction operation.
And a second air-cleaning tank 36 for alkaline cleaning.

Further, the sludge liquid treatment system has a sealed first reaction tank 16 in which the sludge liquid is introduced and in which a sludge liquid portion L1 and a gas portion G are formed, and an open hole 19 at one end side to the atmosphere. A first negative pressure reactor 13 having an adjusting cylinder 20 with an on-off valve 28 which is opened and the other end of which is formed with a plurality of holes 54 is disposed in a sludge liquid portion;
A deodorizing device 12 including a negative pressure generating means 18 communicating with the gas part G of No. 6 and generating a negative pressure in the first reaction tank 16;
A centrifugal separator 14 that communicates with the inner bottom of the reaction tank 16 to centrifuge the sludge liquid into a solid component and a liquid component. A centrifugal rotary tank 22 having a hole formed therein, and an outlet 24 provided at the inner bottom of the centrifugal rotary tank to continuously discharge the solid content of the sludge liquid;
The centrifugal rotating tank 22 is housed in a double cylindrical shape in the outer cylinder 72 and is provided rotatably around the longitudinal direction,
The knitted filter cloths 92 may be circumferentially arranged on the inner wall of the centrifugal rotary tank 22.

Further, a spacer net 94 may be narrowly disposed between the inner wall of the centrifugal rotary tank 22 and the filter cloth 92.

Further, the sludge liquid is raw urine of an animal or the like, and the centrifugal separator 14 is charged with the centrifuged liquid L2 separated by the centrifugal separator to form a liquid part and a gas part G therein. A closed second reaction tank 96 and an open hole 19 at one end.
The on-off valve 28 which is opened to the atmosphere and the other end of which is provided with a plurality of holes 54 is disposed in the centrifugal liquid L2.
A second negative pressure reactor 102 having a second adjusting cylinder 98 and an ammonia removing chemical liquid unit 100 may be connected.

Further, a stirring means (106) for stirring the liquid portion in the second reaction tank 96 may be provided.

Further, the second reaction tank 96 may be connected to an adsorption column device 118 for decolorizing the liquid in the second reaction tank.

The communication between the gas part G in the second reaction tank 96 and the negative pressure generating means 18 or the communication between the gas part G in the first reaction tank 16 and the negative pressure generating means 18 is selectively switchably connected. The communication switching means (114) may be provided.

Further, according to the present invention, a sludge liquid is introduced, and a sludge liquid portion L1 and a gas portion G are formed inside the hermetically sealed first portion.
The negative pressure generating means 18 is connected to the gas part G of the reaction tank 16 to generate a negative pressure.
An adjustment cylinder 20 which is open to the atmosphere and the other end of which is provided with a plurality of holes 54 is disposed in the sludge liquid part L1 as 9
And an opening / closing valve mechanism (28) for opening and closing the opening 19 in the adjusting cylinder 20. By opening and closing the opening 19 of the adjusting cylinder 20, a negative pressure is generated while taking in air into the sludge liquid from the hole 54 of the adjusting cylinder. The method comprises a method for deodorizing a sludge liquid by separating an odor component from the sludge liquid and raising the gas into the gas part while maintaining the negative pressure of the gas portion G of the first reaction tank 16 by the means 18 within a predetermined range.

Further, according to the present invention, a negative pressure generating means is provided in the gas part G of the sealed first reaction tank 16 in which the urine fluid part (L1) and the gas part G are formed by charging the animal raw urine. A negative pressure is generated by communicating the odor component with the urine fluid while the negative pressure of the gas portion G of the first reaction tank 16 is maintained within a predetermined range by the negative pressure generating means while taking in air into the urine fluid portion. Part (L
1) A first step of separating from the inside, rising into the gas part and sucking and removing, a second step of introducing a chemical solution that causes sediment in the urine fluid in the first reaction tank 16, and a sedimentation in the first reaction tank The method comprises a method of treating animal raw urine, which includes a third step of solid-liquid separation of urine fluid containing solid matter, and a fourth step of introducing a chemical solution for removing ammonia into the liquid separated in the third step.

The method may further include a step of passing the liquid from which ammonia has been removed in the fourth step through the adsorption column (118).

[0016]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 3
Is a sludge liquid treatment system 1 according to a first embodiment of the present invention.
In the figure, the sludge treatment system 10a includes a deodorizing device 12 and a centrifugal separator 14. The deodorizing device 12 has a first negative pressure reaction device 13 and negative pressure generating means 18. Further, the first negative pressure reaction device 13 includes a first reaction tank 16 and an adjusting cylinder 20. In the embodiment, the sludge liquid treatment system 10a is a system for treating animal raw urine, for example, animal manure such as cows and pigs. It is charged into the first reaction tank 16 via the valve 28 and the pressure pump 30.

In the embodiment, in the sludge liquid treatment system, the sludge liquid L as animal manure is stored for a required time in the raw urine tank 26, and is separated to a certain extent into a solid component and a liquid component. The liquid further contains a large amount of floc and particulate solids. Then, raw urine as a liquid portion in the raw urine tank 26 is introduced into the first reaction tank 16. In raw urine, mainly BOD (biochemical oxygen demand),
It contains COD (Chemical Oxygen Demand), ammonia (NH ₃ ) component, phosphoric acid (H ₃ PO ₄ ) component and colloid. And about these processes, BOD, COD
It is necessary to keep the value below the standard, and furthermore, when releasing or discharging, it is necessary not to discharge bad odors and to release colored substances irrespective of gas or liquid. The raw urine contains solid, liquid and gaseous components, which are allowed to be released only after the treatment that satisfies these requirements.

In FIG. 1, the first reaction tank 16 is made of stainless steel such as SUS305. Not limited to this, an epoxy resin may be applied to the surface of the steel sheet so that it does not easily react with ammonia, etc., and the surface may be coated with Teflon. You may comprise. The first reaction tank 16 is formed of a hollow cylindrical tank having a capacity of, for example, about 300 liters or 500 liters. The upper surface is covered with a sealing lid 15 and the inside is sealed. As shown in the figure, the liquid portion in the raw urine tank 26 is charged into the first reaction tank 16 by the pressure pump 30. Inside the first reaction tank 16, the sludge liquid portion L1 and the gas portion G
Is formed. In the gas part G of the first reaction tank 16,
A negative pressure pump 32 composed of a vacuum pump serving as a negative pressure generating means 18 described later is communicated with the negative pressure drive so that the first reaction tank 1 including the gas part G is driven when the negative pressure pump 32 is driven.
A negative pressure is generated in the tube 6.

An adjustment cylinder 20 is provided in the first reaction tank 16. One end of the adjusting cylinder 20 is protruded upward from the closed lid 15 of the first reaction tank 16, and the leading end opening thereof is opened to the atmosphere as an open hole 19. The other end of the adjusting cylinder 20 is disposed in the first reaction tank 16, and the tip end of the adjusting cylinder 20, that is, the lower end of the adjusting cylinder 20 is bent into an L-shape to be slightly lower than the inner bottom 16 a of the first reaction tank 16. It is arranged above. Thus, the L-shaped lower end side of the adjusting cylinder 20 is in a state of being settled in the sludge liquid, and the L
A plurality of holes 54 are drilled in the letter-shaped horizontal tube portion. An electromagnetic valve 42 as an on-off valve is interposed at the upper end side of the adjusting cylinder 20, that is, near the atmosphere opening, and by opening and closing the electromagnetic valve 42, the inside of the adjusting cylinder 20 is opened through the opening 19. And is cut off.

Air bubbles are released into the sludge liquid portion L1 by suction of the negative pressure into the sludge liquid portion L1 of the atmosphere from the hole 54 of the L-shaped horizontal pipe portion of the adjusting cylinder 20, and the air bubbles are present in the sludge liquid. The gas component accompanied by the foul odor is dissolved in the bubbles of air and rises in the sludge liquid to be released to the gas part G. Then, the gas in the gas portion G is suctioned negatively by the negative pressure generating means 18 to remove odorous components in the sludge liquid that accompany odor. The solubility of the gas is related to the pressure. Under high pressure, the solubility in the sludge liquid is high, and at low pressure, the solubility in the sludge liquid is low. Therefore, when the inside of the first reaction tank 16 is in a negative pressure state as in the present invention, the solubility of the gas, that is, the odor component, in the sludge liquid is low, and therefore, the gas or the odor component is sucked and discharged from the hole 54 of the adjusting cylinder 20 into the sludge liquid. The air bubbles rise to the gaseous portion G above the first reaction tank 16 by buoyancy while taking in the odor components not dissolved in such sludge liquid.

In general, the malodor of animal manure is an intense odor component including not only ammonia but also a mercaptan-based volatile organic acid odor component. Therefore, ammonia and other malodorous components are removed by the deodorizing step by the first negative pressure reactor 13 and the negative pressure generating means 18. The deodorizing action by the negative pressure suction action by the first negative pressure reaction device 13 and the negative pressure generating means 18 is effectively applied not only to animal manure but also to other life, treatment of industrial waste liquid and other sludge liquid. The power supply load is reduced by the system configuration based on the negative pressure suction action, which contributes to a reduction in power cost.

In the embodiment, a stirring blade device 55 is provided in the first reaction tank 16. A motor 56 is attached to the center of the closed lid 15 of the first reaction tank 16, and a rotating shaft 58 connected to a rotating shaft of the motor 56 is suspended downward and suspended in the sludge liquid. It is arranged so that the tip may be inserted. Stirring blades 60 made of a cross-shaped round bar are fixed to the rotary shaft 58 at two places, and the driving of the motor 56 rotates the stirring blades 60, thereby causing the sludge liquid to flow slowly and smoothly. Stir and circulate to mix. The rotation speed of the motor 56 needs to be slow, and is set, for example, in a range of about 60 rpm to about 200 rpm. The stirring blade device 55 directly stirs and mixes the sludge solution, but functions as a means for promoting the odor component uptake. The uptake of the undissolved odor component in the sludge solution L is performed on the surface of the sludge solution. The negative pressure is not applied only to the portion, and the negative pressure is generated uniformly throughout the lower, middle and upper layers in the sludge liquid.

That is, the stirring blade device 55 as the stirring means functions as an odor component intake means, and the air drawn into the sludge liquid L by the negative pressure causes the action of taking in the undissolved odor component to the sludge liquid. By generating a water flow which is stirred at a low speed in this way, not only the negative pressure suction of only the surface of the sludge liquid, but also the odor component taking-up action on the entire sludge liquid part L is generated. Is generated, and it becomes possible to efficiently suck and discharge the odor component causing the bad odor. In this way, the uptake of odorous components throughout the sludge solution is promoted, so that the odorous components can be collected with high efficiency, so that the intake and collection time corresponding to the amount of air sucked is greatly reduced and the collection and capture efficiency is improved. Will be improved. Therefore, with a simple structure, the size of the apparatus can be reduced, and the sludge treatment capacity can be improved.

A chemical solution unit 62 is connected to the closed lid 15 of the first reaction tank 16, and a required amount of the sedimentation flocculant corresponding to the amount of urine forming the sludge liquid part L 1 in the first reaction tank 16. Is charged into the sludge liquid L1. The flocculant is, for example, an aluminum-based flocculant such as aluminum sulfate (trade name, sulfate band) or aluminum chloride (including liquid and solid), iron (III) sulfate, iron (III) chloride (trade name, Taikifloc polyiron) Iron-based flocculants and other polymer flocculants are used. The precipitating flocculant as these chemicals is supplied to the first reaction tank 1
6, the BOD substance, the COD substance, and the colloid in the sludge liquid are coagulated and settled to form a colloid in the inner bottom portion 16a of the first reaction tank 16, thereby causing sedimentation. Any other agent may be used as the precipitation flocculant. In this way, by performing the precipitation action simultaneously with the removal of the malodorous component, it is possible to remove the odorous gas accompanying the malodor and to remove the BOD and COD of the living environment standard by the precipitation. Further, by removing the offensive odor component first in the treatment of the sludge liquid, the offensive odor does not remain in the next step, and the odor component can be reliably removed.

The introduction pipe 6 is provided on the bottom wall 17 of the first reaction tank 16.
The liquid containing the precipitated solids precipitated on the inner bottom of the first reaction tank 16 is centrifuged through the introduction pipe 64 via a solenoid valve 66 and a pump 68 interposed in the introduction pipe 64. It is introduced into the device 14 side.

In the embodiment, two first and second air-washing tanks 34 and 36 are provided between the first reaction tank 16 and the negative pressure pump 32.
The first reaction tank 16 and the first air-washing tank 34 are communicated with each other by a first negative-pressure pipe 33, and a second negative-pressure pipe is provided between the first air-washing tank 34 and the second air-washing tank 36. 35, and the second air-washing tank 36 and the negative pressure pump 32
They are connected by a negative pressure tube 37. The upper surfaces of the first air-washing tank 34 and the second air-washing tank 36 are covered, and the insides thereof are sealed. First in the embodiment,
The second air-washing tanks 34 and 36 are formed of, for example, acid-resistant stainless steel. A corrosion-resistant synthetic resin such as polyethylene may be used. One end opening side of the first negative pressure tube 33 communicates with the gas portion G of the first reaction tank 16 and the first negative pressure tube 3
The other end opening side of 3 is disposed in a chemical solution for acid cleaning of the first gas cleaning tank 34.

Further, one end opening side of the second negative pressure tube 35 is
The other end opening side is communicated with the gas portion G of the first air-washing tank 34, and is disposed in a chemical solution for alkali treatment in the second air-washing tank 36. Further, one end opening side of the third negative pressure pipe 37 is connected to the gas portion G of the second air-washing tank 36, and the other end opening side is connected to the negative pressure pump 32. An electromagnetic valve 38 is interposed and connected to an intermediate position of the first negative pressure pipe 33, and an electromagnetic valve 40 is also connected to an intermediate position of the third negative pressure pipe 37.
Are provided in communication with each other.

Then, a negative pressure pump 3 comprising a vacuum pump
The first, second, and third negative pressure pipes 33, 3 are driven by the second negative pressure drive.
Negative pressure is applied to the gas portions of the second air-washing tank 36 and the first air-washing tank 34 via the air purifiers 5 and 37, so that the negative pressure is applied to the liquid part of each of the air-washing tanks 34 and 36, and the gas in the preceding process is reduced. The parts of the gas are suctioned negatively into their liquid parts and released. The first and second air-washing tanks 34 and 36 may be small-capacity tanks of, for example, about 20 liters or 30 liters, and achieve the miniaturization of the whole apparatus, space saving, and reduction of power load. Due to the air-washing action of the first and second air-washing tanks 34 and 36, ammonia and malodorous organic acid odor components are almost completely removed to such an extent that they can be released to the atmosphere.

An acid chemical for acid cleaning is previously supplied to the first gas cleaning tank 34, and a chemical for alkaline cleaning is supplied to the second gas cleaning tank 36. For example, diluted sulfuric acid is stored in the first air-washing tank 34 in advance. First reaction tank 1
The odor components floated in the gas portion G by air bubbles from the sludge liquid portion L1 of No. 6 are mainly ammonia and organic acid volatile components, and these are introduced into the first gas washing tank 34 by the first negative pressure pipe 33. You. Then, it reacts with the diluted sulfuric acid in the first gas washing tank 34 to remove the ammonia basic component. That is, the dilute sulfuric acid and ammonia react to produce ammonium sulfate, which precipitates at the bottom. Since sulfuric acid reacts with ammonia at about 35% concentration to precipitate crystals, it is preferable that the sulfuric acid concentration is about this level. However, it is not limited to this concentration. Ammonia is removed from the gas floated from the dilute sulfuric acid in the first gas-washing tank 34 to the gas portion, and a large amount of mercaptan-type organic acid volatile components is present, accompanied by an unpleasant odor.

In the embodiment, sodium carbonate, calcium hydroxide and other alkaline chemicals for alkali cleaning are charged into the second air-washing tank 36. First air washing tank 34
In some cases, the gas component which is sucked under a negative pressure into the second air-washing tank 36 and floated on the gas portion after the acid cleaning contains an organic acid component and hydrogen sulfide, and these are neutralized with an alkaline chemical solution. , To be removed. by this,
The gas exiting through the third negative pressure tube 37 is completely odorless after passing through the acid washing and alkali washing steps. Although not shown, a gas phase column of activated carbon may be provided and connected to the negative pressure pump 32, and the gas discharged from the negative pressure pump 32 may be passed through the column to remove neutral odor components. . As in the embodiment, it is necessary to connect an acid washing step as the first gas washing tank 34 next to the first negative pressure reactor 13 and then connect an alkali washing step as the second gas washing tank 36. There is. If an alkaline rinsing step is performed first, the acidic odor component coming out of the first negative pressure reactor 13 is neutralized and remains in the liquid in the alkali cleaning step, which remains as an odor component and cannot remove odors. Become like

As described above, the odor component in the sludge liquid is removed while sucking the sludge liquid in the closed tank through the negative pressure generating means 18 by the negative pressure suction method, and at the same time, the nitrogen in the first reaction tank 16 is removed by air. Can be taken into the bubble and floated,
Therefore, the total nitrogen component in the gas finally recovered from the negative pressure tank 32 can be significantly reduced.

On the other hand, in FIG. 1 and FIG.
A gas pressure maintaining device 43 for maintaining the negative pressure in the gas portion G constant. In the embodiment, the gas part pressure maintaining device 43 includes a control part 44 and a gas part sensor 4 that detects the pressure in the first reaction tank 16 and supplies an electric signal to the control part 44.
6, an atmosphere opening solenoid valve 42 electrically connected to a control unit 44, and a negative pressure pump 32 for driving and stopping the motor in response to a command signal from the control unit 44. The control unit 44 compares an electric signal corresponding to the detected pressure in the gas part G of the first reaction tank 16 supplied from the gas part sensor 46 with a set value corresponding to the set negative pressure to determine a deviation signal. A comparing unit 48 to be supplied to the unit 50; a determining unit 50 for determining whether to issue a valve opening or closing signal of the solenoid valve 42 based on the signal deviation supplied from the comparing unit 48;
It has.

Thus, for example, if the negative pressure is too high than the set negative pressure, the first reaction tank 16 is connected to the control unit 44 while the negative pressure pump 32 is driven, while the solenoid valve 42 is kept open. The sludge liquid is compressed by the negative pressure to the gas part G in the inside and the atmosphere is taken in.
When the internal pressure increases, a negative pressure is applied to the gas portion G while closing the solenoid valve 42. With this, air is negatively sucked from the atmosphere into the sludge portion L while always applying the set negative pressure to the gas portion G of the first reaction tank 16,
The bubbles of air are discharged from the holes 54 of the adjusting cylinder 20, and the undissolved odor components and the nitrogen components are taken into the bubbles and rise to the gas portion G. Note that the gas pressure maintaining device 43 may be configured such that a timer mechanism is connected to the electromagnetic valve 42, and the electromagnetic valve 42 is opened and closed at predetermined time intervals while a negative pressure is constantly applied by the negative pressure pump 32.

The pressure in the first reaction tank 16 is controlled, for example, by the first and second air-washing tanks 34 and 36, the first, second and third negative pressure pipes 3.
It is preferable to maintain the pressure in 3, 35, 37 at about 1 hectopascal, that is, about 0.001 atm. In this case, the negative pressure pump 32 is set to generate a negative pressure of about 1 atm. Further, the volume ratio between the amount of air sucked from the inside of the adjusting cylinder 20 and the sludge liquid is, for example, 32.
00: 1 is preferred. Thereby, the ammonia component in the sludge liquid L is largely removed. In addition, the efficiency of removing the odor component is extremely good, so that the processing apparatus can be significantly reduced in size.
In addition, the combination of a plurality of negative pressure tubes and an air-washing tank ensures the deodorization of the sludge solution and removes harmful substances such as sulfuric acid or nitric acid. Material removal can be performed at the same time. For example, when the capacity of the first reaction tank is 3200 liters, it takes about 5 hours by a large pump to send air by forcible pressure of air into the first reaction tank. It has been confirmed that the odor removal step is completed in about 20 minutes at 0.001 atm.

The centrifugal separator 14 has a centrifugal rotary tank 22 and a discharge port 24 provided at the inner bottom of the centrifugal rotary tank 22. In FIG. 2, the centrifugal rotary tank 22 is formed of a rotary drum body, and has a plurality of holes 23 formed in a side wall thereof.
Then, the entire centrifugal rotation tank 22 rotates through a driving device 70 provided near the centrifugal rotation tank 22. The centrifugal rotary tank 22 is made of stainless steel or other high corrosion-resistant material having excellent corrosion resistance, is formed in a cylindrical shape, and the bottom side is tapered downward in a funnel shape, and a discharge port 24 is provided at the center of the bottom. I have.

In FIG. 2, an outer cylinder 72 having a canopy 71 fitted therein and hermetically sealed inside is supported by a support base 76. The centrifugal rotary tank 22 is arranged inside the outer cylinder 72 so as to form a double cylinder, and the centrifugal rotary tank 22 is rotatably provided about a longitudinal direction. On the other hand, an introduction pipe 64 penetrates downward from the upper surface side so as to penetrate the outer cylinder 72 and the canopy 71 and the upper surface plate 21 of the centrifugal rotation tank 22, and penetrates the central portion thereof to open the lower end opening in the centrifugal rotation tank 22. Has been placed. Thereby, the introduction pipe 64 and the centrifugal rotary tank 22
The inside communicates. A gap is formed between the centrifugal rotation tank 22 and the outer cylinder 72, and the liquid component discharged by the centrifugal force from the hole 23 formed in the peripheral wall of the centrifugal rotation tank 22 is communicated with the bottom plate 73 of the outer cylinder 72. The liquid is discharged from the liquid discharge pipe 74 to another processing step.

In FIG. 2, on the inner wall of the centrifugal rotary tank 22, a knitted and knitted filter cloth 92 is circumferentially arranged in a hollow cylindrical shape along the inner wall. Thereby, the first
At the time when the liquid (colloidal liquid) containing the precipitated solid in the reaction tank 16 starts to be poured into the centrifugal rotation tank 22, the solid precipitated in the inner bottom portion 16a of the first reaction tank 16 is efficiently filtered. The liquid component adheres to the inner surface side of the cloth 92, and the liquid component passes through the filter cloth 92, is discharged from the hole 23 of the centrifugal rotation tank 22 to the gap between the outer cylinder 72 and the centrifugal rotation tank 22, and is supplied to the liquid discharge pipe 74. It is designed to flow down.

The filter cloth 92 is formed, for example, by weaving fibers made of polypropylene or the like, and its mesh holes form holes of approximately 50 microns.
Mesh holes can range from 1 micron to 200 microns if possible
A micron is selected. From the standpoint of the separation efficiency between the solid part and the liquid part, those having a size of about 50 microns are more preferable. The filter cloth 92 is formed by weaving the fibers in this way, and therefore freely and flexibly expands and contracts in response to a change in the rotation speed when the centrifugal rotation tank 22 rotates. The mesh holes also change correspondingly, thereby effectively preventing clogging of solids and washing down the solids with liquid as the filter cloth 92 expands and contracts during rotation. It can be performed effectively.

In the embodiment, a spacer net 94 is interposed between the inner wall of the centrifugal rotary tank 22 and the filter cloth 92. In this embodiment, the spacer net 94 is made of stainless steel, and is formed of a cylindrical metal net formed by vertically and horizontally knitting corrugated stainless steel wires having corrugated shapes. Accordingly, many gaps are formed between the filter cloth 92 and the spacer net 94, and between the spacer net 94 and the inner wall of the centrifugal rotary tank 22. Thereby, the filter cloth 92 does not directly contact the inner wall of the centrifugal rotary tank 22 when the centrifugal rotary tank 22 rotates, so that clogging does not easily occur, and the solid component is easily moved downward. The continuous separation operation of the sludge liquid can be executed by washing it away.
That is, the solid content of the sludge liquid that has stayed in the inner bottom of the first reaction tank 16 flows into the centrifugal rotation tank 22 and adheres to the surface of the filter cloth 92, but the sludge in the first reaction tank 16 gradually increases. When the inflow of the liquid component of the liquid increases, the solid component adhering to the inner wall side of the centrifugal rotation tank 22 is caused to flow downward by the centrifugal rotation force so as to be washed down, and is efficiently caused to flow down from the discharge port 24. It is discharged from the 92 mesh holes to the gap side via the holes 23 in the peripheral wall of the centrifugal rotary tank 22. The liquid component is in a state of being atomized and floating in the form of a mist in the centrifugal rotation tank 22 that rotates at a high speed. 23
Is discharged to the gap side with the outer cylinder 72.

On the other hand, a hollow fixed cylinder 78 having an open upper and lower surface penetrating the bottom of the centrifugal rotary tank 22 and the bottom of the outer cylinder 72 is attached. The upper opening of the fixed cylinder 78 is the discharge port 24. The fixed cylinder 78 penetrates through the centrifugal rotary tank 22 and the bottom of the outer cylinder 72 and is vertically arranged vertically downward. Therefore, the solid content discharged from the inside of the centrifugal rotary tank 22 is directly discharged from the discharge port 24 to the outside. The discharge port 24 may be configured as a simple discharge hole provided at the bottom of the centrifugal rotary tank 22, and the position to be set may be any position. From the outlet 24, the solid content after centrifugation continuously flows down along the inner wall of the centrifugal rotary tank 22. That is, the solids mainly separated by the centrifugal separation through the outlet 24 are discharged in a continuous downflow state. Fixed cylinder 7
The lower side of 8 is fixed in the vertical direction by a gantry 90 via a fixing bracket 79, and the upper side of the fixed cylinder 78 is disposed at a position below the outer cylinder 72 and at the center of the bottom surface of the centrifugal rotary tank 22. It is installed as follows. In FIG.
A rotating cylinder 80 is provided on the outer periphery of the fixed cylinder 78 via two bearings vertically so as to be supported by the fixed cylinder 78. The rotating cylinder 80 is rotatable about a longitudinal axis of the fixed cylinder 78. This rotary cylinder 80
Is attached through a mounting hole provided at the center of the outer cylinder 72, and is also rotated with respect to the bottom plate 73 of the outer cylinder 72 by a bearing 82 provided on the periphery of the mounting hole at the bottom of the outer cylinder 72. I can do it.

A flange portion bent in an L-shape is formed from the upper end side of the rotary cylinder 80, and is fixed to the bottom wall side of the centrifugal rotary tank 22 via this flange portion. As a result, the rotary cylinder 80 and the centrifugal rotary tank 22 rotate integrally. Further, a donut disk-shaped pulley plate 84 is fixed to the outer periphery of the rotary cylinder 80 in the figure. A plurality of belt grooves are engraved on the outer periphery of the pulley plate 84, and a drive motor 8 mounted near the pulley plate 84 is provided.
The belt is adjusted in the belt groove of the pulley 85 connected to the pulley 6, whereby the driving force of the drive motor 86 is directly transmitted to the centrifugal rotation tank 22, and the centrifugal rotation tank 2 is rotated at the set rotation speed.
2 rotates. Here, the fixing bracket 79 of the gantry 90
As a result, the fixed cylinder 78 moves the discharge port 24 at the upper end to the centrifugal rotation tank 22.
The centrifugal rotary tank 22 is driven vertically by a drive motor 86 in this state, and the entirety of the centrifugal rotary tank 22 is fixed.
8 rotates in the vertical direction while being pivotally supported.

As described above, the centrifugal separator 14 is provided in the centrifugal rotary tank 22 in which the sludge liquid is introduced and a plurality of holes 23 are formed in the peripheral side wall, and the inner bottom of the centrifugal rotary tank 22. And a discharge port 24, whereby the solid matter having a higher specific gravity attached to the surface of the filter cloth 92 by the liquid component that is delayed by the centrifugal rotation of the centrifugal rotation tank 22 is centrifugally rotated. While the tank 22 is rotating, the liquid component is discharged from the peripheral wall hole 23 of the centrifugal rotary tank 22 while being discharged from the discharge port 24, and the solid component and the liquid component are separated. Therefore, the solid-liquid separation after removing the odor component with high efficiency while continuously operating the system is realized. A receiving frame 91 is provided below the lower end of the fixed cylinder 78, and solid components collected by, for example, a belt conveyor (not shown) are sent to the next processing step.

The centrifugal separator 14 is unique in its own structure. For example, when only a sedimentation flocculation tank is used and milk waste liquid or sludge liquid as other wastewater is charged into the tank and a sedimentation flocculant such as aluminum sulfate is charged therein, colloid precipitation occurs. The liquid containing the precipitate is introduced into the centrifugal separator 14 having the same configuration as the above-described centrifugal separator, and the milk waste liquid can be centrifuged into a solid component and a liquid component. The filter cloth 92 and the spacer net 94 in the centrifugal rotary tank 22 are the same as those described above, whereby even during rotation of the centrifugal rotary tank 22, solids are continuously discharged from the discharge port 24, and centrifugal rotation is performed. The system can be continuously operated without temporarily interrupting the separation operation, thereby improving the processing efficiency, and continuously operating in the sedimentation / aggregation step or the alkali treatment step connected before and after the centrifugal separator 14, and the system The overall processing efficiency can be greatly improved.

Next, the operation of the sludge liquid treatment system according to the first embodiment of the present invention will be described.
The sludge liquid as animal manure is supplied from the raw urine tank 26 into the first reaction tank 16 through the first reaction tank 16. The set pressure of the gas pressure maintaining device 43 is set to a negative pressure of, for example, about 0.001 atm. A precipitate in the form of a precipitate. Then, the stirring blade 60 of the stirring blade device 55 as a stirring means is rotated to slowly stir and mix the sludge liquid in the first reaction tank 16. The negative pressure pump 32 is driven, and the first and second air purifying tanks 34 and 36 and the first, second,
A negative pressure is applied to the gas portion G in the first reaction tank 16 via the third negative pressure pipes 33, 35, 37. The on-off valve 28 is opened and closed while detecting the pressure by the pressure sensor 46 in the first reaction tank 16 to maintain the set pressure. At this time, the first pressure is higher than the set pressure.
When the pressure of the gas part in the reaction tank 16 is low, the solenoid valve 42
, The air is taken in, the air is taken in from the hole 54 of the adjusting cylinder 20, the air is sucked into the sludge liquid, and the odor component is taken out and released to the gas part G. When the internal pressure increases, the solenoid valve 42 is closed to perform a negative pressure action by the negative pressure pump 32 to maintain the internal pressure at a predetermined set pressure.

By the negative pressure suction action, the air is taken in from the open hole 19 and is sucked and released from the hole 23 of the adjusting cylinder 20 into the sludge liquid portion L of the first reaction tank 16, and the air bubbles released at this time are removed. Undissolved odor components such as ammonia and organic acid volatile odor components are taken in and floated to the gas part G as they are. Then, while being washed with acid in the first gas washing tank 34 and alkali-washed in the second gas washing tank 36, when it is sucked by the negative pressure pump 32, almost odorless gas is sucked. The components are removed. In particular, since the odor component is removed while taking in the atmosphere by the air stripping method, that is, the negative pressure suction method, the size of the apparatus can be significantly reduced and the odor component removal efficiency can be significantly improved as compared with the forced air feeding method. In addition, since the negative pressure suction is performed while gently diffusing and mixing by the stirring blade device 55, the incorporation of the undissolved odor component into the air by the negative pressure suction is not limited to the surface of the sludge liquid portion, but also to the sludge liquid portion. It can be performed up and down as a whole, and can achieve a significant improvement in odor component removal efficiency. Further, the nitrogen component can be removed with high efficiency by the negative pressure suction method. Gas cleaning can be performed by the first and second air-washing tank steps, and at the time of suction by the negative pressure pump 32, an odorous component can be removed to the extent that it can be released to the atmosphere.

In the first reaction tank 16, a colloidal solid is coagulated and settled on the inner bottom of the first reaction tank 16 by the introduction of a chemical such as aluminum sulfate by the chemical unit 62. Then, while driving the drive motor 86 to rotate the centrifugal rotation tank 22 of the centrifugal separator 14 at, for example, about 750 rpm, the colloidal liquid in the first reaction tank 16 is introduced into the centrifugal rotation tank 22 by the intermediate pump 68. First, a centrifugal rotary tank 22 in which colloidal solid precipitates are rotating.
Into the filter cloth 92 and immediately adhered to the inside of the filter cloth 92 by centrifugal force.
When the liquid is introduced into the liquid, a part of the liquid in the liquid part is atomized into a mist by centrifugal rotation, while the liquid blown in the radial direction acts to wash away the adhered solids. While passing through the filter cloth 92, it reaches the space between the outer cylinder 72 and the centrifugal rotary tank 22 through the spacer mesh 94 and the hole 23 in the peripheral wall of the centrifugal rotary tank 22, and is further converged to the liquid discharge pipe 74 side. The liquid portion is collected.

The solid that has been washed away by the liquid introduced late from the introduction pipe 64 and has flowed downward along the inner wall of the centrifugal tub 22 is directly discharged from the outlet 24 at the bottom and guided to the inner wall of the fixed cylinder 78. Then, it falls into the lower receiving frame 91 and is discharged to the next step or the like by a belt conveyor or the like. The solid content discharged from the discharge port 24 has, for example, a water content of about 95%, so that fertilizer can be easily formed by drying the sky for about three days. The liquid component discharged by the discharge pipe 74 is once collected, and may be passed through a filter medium such as activated carbon, for example, by adjusting the pH of the liquid component by adding a neutralizing agent such as a chemical solution. As a result, a value below the reference value that does not affect the environment can be obtained and released to rivers and the like.

Here, deodorizing is performed by the deodorizing device 12 to remove bad odors, and at the same time, BOD, COD and colloids are precipitated by the coagulant supplied from the chemical solution unit 62, and The liquid component containing the precipitated solid is continuously discharged from the discharge port 24 from the bottom while being continuously separated into a liquid portion and a solid portion by the centrifugal separator 14. The system configuration based on the negative pressure suction system has a very simple structure and can be embodied with a small size, and can be easily manufactured and the manufacturing cost can be kept low. The filter cloth 92
It is possible to continuously operate the system only by periodic replacement, and to process a large amount of animal manure. This enables continuous treatment of sludge generated from animal manure and the like, and a very practical sludge treatment system 10a.
Is realized. In the embodiment, the treatment system for animal excrement has been described. However, the treatment system for sludge of the present invention may be applied to, for example, treatment of sewage drainage, industrial wastewater, and other sludge.

Next, a second embodiment of the sludge treatment system of the present invention will be described with reference to FIG. 4. The same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof is omitted. I do. In the second embodiment, the first reaction tank 16, the first and second air-washing tanks 34 and 36, except that the first reaction tank 16 is not provided with the stirring blade device 55 as stirring means.
The configuration of the first to third negative pressure tubes 33, 35, 37 is the same as that of the first embodiment. The first negative pressure reactor 13 and the centrifugal separator 14 are connected in the same configuration as in the first embodiment.
The configuration of the centrifugal separator 14 is the same as that of the first embodiment, and the detailed internal structure, the drive mechanism including the drive motor 86, and the like are not shown.

In this embodiment, the sludge liquid is raw urine of an animal or the like, and the sludge liquid treatment system 10b is connected to the centrifugal separator 14 and centrifuged by the centrifugal liquid L.
The second negative pressure reactor 102 having the second reaction tank 96 for introducing the second, the second adjusting cylinder 98 and the ammonia removing chemical liquid unit 100 is connected. Second negative pressure reactor 102
Has the same configuration as the first negative pressure reactor 13 in the first embodiment, and has one end open to the atmosphere in the second reaction tank 96 and the other end having a plurality of holes formed therein. The second adjusting cylinder 9 is disposed near the bottom of the second reaction tank 96.
8 are provided. An electromagnetic valve 104 as an open / close valve is interposed in the second adjustment cylinder 98. In this embodiment, the substance introduced into the second reaction tank 96 is the centrifuged liquid L2 separated by the centrifugal separator 14.

In the second embodiment, a stirring blade device 106 having the same structure as that of the first embodiment is attached to the second reaction tank 96. The operation of the stirring blade device 106 is the same as in the first embodiment. In the second embodiment, the centrifuge 14
Thereby, only the liquid component excluding the solid component is introduced into the second reaction tank 96, so that the liquid component is not hindered by the colloids and the like,
Detection of the amount of the liquid to be supplied by a sensor or the like is reliable and easy. In addition, the reaction with the ammonia removing chemical solution described in the first embodiment is efficiently promoted in a short time with respect to the entire centrifuged liquid L2. The centrifugal separator 14 and the second reaction tank 96 are communicated via a second introduction pipe 108,
If necessary, a pressure pump 110 is interposed in the second introduction pipe 108.

The ammonia removing chemical unit 100 includes:
Connected to a chemical solution inlet 112 provided in the second reaction tank 96, for example, a fixed amount of the chemical solution is injected at constant or indefinite time intervals or intermittently. In the embodiment, the chemical is an alkaline solution, and is preferably an alkaline solution that can be introduced into a centrifuged solution to obtain a pH value of about 11.5 to about 12. In the embodiment, for example, calcium hydroxide (Ca (OH) ₂ ) is selected. Calcium hydroxide is more preferable because it causes a reaction at a low cost and automatically brings the pH value to about 11 to 12. Original urine tank 2
Phosphoric acid components are contained in the raw urine 6 and most of them are mixed in the raw urine as colloidal phosphate. These solids are separated by the centrifugal separator 14 and about 60 percent of them are removed. The remaining centrifugal liquid L2 containing about 40 percent of liquid phosphoric acid is an acidic liquid, which is introduced into the second reaction tank 96 and reacts with calcium hydroxide, which is an alkaline solution, to ionize it.
This reacts with calcium and precipitates. That is, when calcium hydroxide is introduced into the centrifuged liquid L2 in the second reaction tank 96, the pH is changed to about 11.5 to about 12,
Since the centrifugal solution contains phosphoric acid (H ₃ PO ₄ ), calcium phosphate (Ca (PO ₄ ) ₂ ) is generated and almost completely precipitated, while it is contained in the centrifugal solution L2. Ammonium ions (NH ₄ ⁺ ) are reacted with hydroxide to cause a reaction of NH ₄ ⁺ + OH ⁻ → NH ₃ + H ₂ O to generate gaseous ammonia (NH ₃ ). Therefore, the ammonia component is removed by reducing the pressure and suctioning the solution. As a result, in the state of the centrifugal separation liquid L2, the color having black turbidity changes to a slightly yellowish color, and is volatilized as it is to the atmosphere. Can be released.

Further, in this embodiment, the third negative pressure tube 37
Is provided with a communication switching means. In the embodiment, the switching solenoid valve 114 is used as the communication switching means in the third negative pressure pipe 37.
And one end of the fourth negative pressure tube 116 is connected to the second
It is arranged in the gas part G in the reaction tank 96 and the other end is connected to the switching electromagnetic valve 114. The switching solenoid valve 114 selects between a state in which the gas part in the second reaction tank 96 communicates with the negative pressure generating means 18 and a state in which the gas part in the first reaction tank 16 communicates with the negative pressure generating means 18. Switch The negative pressure suction drive in the deodorizing step and the subsequent processing step can be processed by a common negative pressure pump, so that the overall configuration of the system can be reduced in size and the manufacturing cost can be reduced. Also,
The ammonia removal step can be performed while detecting the progress of the deodorization step performed in the initial stage, and power costs can be reduced.

A control unit (not shown) switches the solenoid valve 114 for switching.
A solenoid valve 42 provided on the adjustment cylinder 20 on the first negative pressure reaction device 13 side, a second electromagnetic valve 104 provided on a second adjustment cylinder 98 on the second negative pressure reaction device 102 side, Pump 32
And the first negative pressure reactor 13
The switching solenoid valve 114 is operated while the deodorizing device 12 is being driven by the first and second air-washing tanks 34 and 36 and the negative pressure pump 32.
Selects the first flow path and drives the inside of the first reaction tank 16 under a negative pressure by the negative pressure pump 32, and appropriately selects the second reaction tank 9.
6 is switched to communicate the gas part in the negative pressure pump 32 and the centrifugal liquid L introduced into the second reaction tank 96 from the centrifugal separator 14 by the pressure pump 110.
2, the ammonia generated by the introduction of a chemical such as calcium hydroxide is suctioned at a negative pressure and discharged to the atmosphere.

Further, in the present embodiment, the second reaction tank 96 is used.
Is connected to an adsorption column device 118 via a communication pipe. The adsorption column device 118 communicates a plurality of containers filled with a solid such as activated carbon, zeolite, alumina, silica gel or the like as a stationary phase therein, passes through the inside, decolorizes the colored centrifuged liquid L2, and further removes odor. Adsorb substance molecules. The liquid that has passed through the adsorption column device 118 is completely transparent and odorless, and satisfies the allowable value for river discharge.

The operation of the sludge liquid treatment system according to the second embodiment will be described. The operation is the same as that of the first embodiment except that the stirring blade device 55 is not attached to the first negative pressure reactor 13. Then, the switching electromagnetic valve 114 is set on the first flow path side, and the deodorizing step by the deodorizing device 12 is performed. That is, the negative pressure generating means (32) is connected to the gas portion G of the sealed first reaction tank 16 in which the urine fluid portion L1 and the gas portion G are formed by feeding the animal raw urine and the negative pressure. Is generated, and the odor component is separated from the urine fluid portion L2 while keeping the negative pressure of the gas portion of the first reaction tank 16 in the predetermined range by the negative pressure generating means while taking in air into the urine fluid portion L1. It is raised in the gas part G and removed by suction (first step). In the embodiment, the first and second air washing tanks 34 and 36 are connected to the first negative pressure reactor 1.
3 and connected to the negative pressure pump 32 to remove ammonia by acid cleaning, and to precipitate and remove organic acid components and the like containing strong malodor by alkali cleaning. Released to the atmosphere.

During or after the first step, a chemical solution such as aluminum sulfate as a urine sedimentation flocculant in the first reaction tank 16 is introduced into the first reaction tank 16 (second step) to cause precipitation. BOD, COD and other colloids are removed. As described above, in the case of animal raw urine with an odor, a deodorization step is performed in the first stage of the treatment, and solid substances are removed at the same time or thereafter. Difficulty is avoided.

Further, the urine fluid containing the precipitated solid in the first reaction tank 16 is subjected to solid-liquid separation (third step). That is, the urine fluid is introduced into the centrifugal separator 14 having the same configuration as that of the first embodiment, and the centrifugal rotation tank 22 is rotated to continuously discharge the solid content from the discharge port 24 while simultaneously discharging the liquid component. The solid and the liquid are centrifuged by being separated and discharged from the liquid discharge pipe 74. The solid content is made into a fertilizer by an ordinary method. The discharged centrifugal separation liquid L2 is a colored liquid that is turbid blackish black. The centrifuged liquid L2 of the centrifugal separator 14 is supplied to the second solenoid valve 1 of the second negative pressure reactor 102.
With the valve 04 opened, it is introduced into the second reaction tank 96 of the second negative pressure reactor 102 via a communication pipe via a pressure pump 110, and a centrifugal liquid part and a gas part are formed inside. Then, a required amount of an alkali hydroxide solution such as calcium hydroxide is charged by the ammonia removal chemical liquid unit 100 (fourth step), whereby the phosphate component is precipitated and removed, and ammonium ions and hydroxide ions are removed. A gaseous ammonia is generated by the above reaction, and the gaseous portion of the depressurized second reaction tank 96 is suctioned by the negative pressure pump 32 through the fourth negative pressure pipe 116 by the negative pressure pump 32. A considerable amount of ammonia has been removed in the deodorization step which is the first step. Therefore, the ammonia is further sucked under reduced pressure in the second reaction tank 96 to further promote the deodorization of the odor component and release it to the atmosphere as it is. You. In addition, if necessary,
You may make it deodorize further by passing through a sulfuric acid tank, and may discharge it.

The liquid containing the phosphoric acid precipitate in the second reaction tank 96 has been removed from ammonia to produce a pale yellow color. I have. Further, in the present embodiment, when the liquid in the second reaction tank 96 passes through the adsorption column device 118, the odor component and the colored component are adsorbed and removed, and the liquid is changed to a completely transparent liquid, so that the liquid can be discharged. Become.

In this embodiment, the liquid centrifuged by the centrifugal separator 14 is subjected to a chemical reaction by the second negative pressure reactor 102 to remove ammonia, thereby realizing a completed sludge treatment cycle. The system configuration can be reduced in size by using the common negative pressure pump 32, and the manufacturing cost can be reduced.

The sludge solution treatment system, sludge solution deodorization method, animal raw urine treatment method, and sludge solution treatment centrifugal separator according to the present invention are not limited to the construction of the embodiment, but are described in the claims. Any modification may be made without departing from the essence of the invention described in (1). For example, the sludge treatment system and the sludge deodorization method may be applied not only to animal manure treatment but also to domestic wastewater, industrial or industrial wastewater, sewerage wastewater treatment, and the like.

[0062]

As described above, according to the sludge liquid treatment system of the present invention, the sealed first reaction tank in which the sludge liquid is charged and the sludge liquid part and the gas part are formed inside the sludge liquid. A first negative pressure reactor having an adjusting cylinder with an open / close valve having one end open to the atmosphere as an open hole and the other end having a plurality of holes perforated in a sludge liquid section; A deodorizing device including a negative pressure generating means communicating with the gas portion and generating a negative pressure in the first reaction tank; and a centrifugal separation of the sludge liquid into a solid content and a liquid content by communicating with the inner bottom of the first reaction tank. A centrifugal separator, wherein the centrifugal separator is provided with a sludge liquid introduced therein and a plurality of holes formed in a peripheral side wall, and a solid sludge liquid provided at an inner bottom portion of the centrifugal rotary tank. And a discharge port for continuous discharge of solids in the sludge liquid after the deodorization step. The liquid component is efficiently discharged from the discharge port, and the liquid component is discharged from the centrifugal rotary tank side, so that solid-liquid separation can be continuously performed.As a result, continuous treatment of the sludge liquid treatment system can be realized concretely and at low cost Can be manufactured,
Further, it is possible to reduce the size of the unit device of the system configuration, and it is possible to perform a large amount of processing in a short time by continuous operation, and it is possible to achieve an effect that maintenance is extremely simple.

Further, a first negative pressure reaction device of the deodorizing device, a first cleaning tank for acid cleaning so as to perform a negative pressure suction operation between the negative pressure generating means, and a second cleaning tank for alkali cleaning. With the configuration in which the gas tank is connected and connected, the ammonia gas contained in the raw urine is removed in the first gas cleaning tank into which the acidic chemical liquid has been charged, and the second gas cleaning liquid into which the alkaline chemical liquid has been charged. Since the organic acid volatile odor components are removed in the tank, the odor components can be reliably removed at the beginning of the treatment of the sludge solution, the gas after removal can be released to the atmosphere, and the subsequent treatment of the sludge solution can be continued. Realization can be contemplated.

Further, according to the sludge liquid treatment system of the present invention, the closed first reaction tank in which the sludge liquid is charged and the sludge liquid part and the gas part are formed inside, and one end side of which is open. A first negative-pressure reactor having an adjusting cylinder with an on-off valve disposed in the sludge liquid portion and having the other end opened to the atmosphere and having a plurality of holes formed therein; and a first negative-pressure reactor communicating with the gas portion of the first reaction tank. A deodorizing device including a negative pressure generating means for generating a negative pressure in one reaction tank, and a centrifugal separator communicating with the inner bottom of the first reaction tank and centrifuging sludge liquid into solid and liquid components. Have
The centrifugal separator has a centrifugal rotary tank into which sludge liquid is introduced and a plurality of holes are formed in the peripheral side wall, and an outlet provided at the inner bottom of the centrifugal rotary tank to continuously discharge solid content of the sludge liquid, The centrifugal rotary tank is housed in a double cylindrical shape in the outer cylinder and is provided rotatably around the vertical direction, and the knitted filter cloth is circumferentially arranged on the inner wall of the centrifugal rotary tank. ,
The solid content in the sludge liquid after the deodorization process is continuously and efficiently discharged from the discharge port as it is, and the liquid content is discharged from the centrifugal rotary tank side, so that solid-liquid separation can be performed continuously, resulting in a sludge liquid treatment system. Can be realized at a low cost, and the unit of the system configuration can be reduced in size. In addition, continuous operation enables mass processing in a short time, and maintenance is extremely simple. is there. At the same time, the solid content precipitated in the first reaction tank after the deodorization step adheres to the filter cloth in the rotating centrifugal rotary tank, and the liquid content in the first reaction tank introduced later delays the solid content. The operation can be specifically realized. Further, the filter cloth is less clogged, the solid-liquid separation action is reliable, and the production cost can be kept low.

Further, since the spacer mesh is narrowly arranged between the inner wall of the rotary tank and the filter cloth, the filter cloth does not adhere to the inner wall side of the centrifugal rotary tank in a tight manner. As a result, the knitted stitch portion moves efficiently, so that clogging is reliably prevented, and a solid-liquid separation action is realized.

The sludge liquid is raw urine of an animal or the like, and the centrifugal separator is filled with the centrifuged liquid separated by the centrifugal separator, and the liquid part and the gas part are sealed inside. A second reaction tank having an open / close valve with an open / close valve and one end opened to the atmosphere with an open hole, and the other end having a plurality of holes formed therein is arranged in a centrifuged liquid. Since the second negative pressure reactor equipped with the chemical solution unit is to be connected, ammonia is further removed by treating the acidic centrifuged liquid with an alkaline solution to further promote deodorization and decolorize. It is possible to further promote the conversion to a state where the liquid content after the centrifugation by the centrifugal separator can be discharged.

Further, by providing a stirring means for stirring the liquid portion in the second reaction tank, the action of taking in the undissolved odor component by the air drawn into the centrifugal liquid by the negative pressure is prevented. As a result, odor components are collected with high efficiency,
The collection time corresponding to the amount of air suction can be greatly reduced, and the collection efficiency can be improved. Also, with a simple structure, the device can be downsized and the processing capacity can be improved.

Further, the second reaction tank is connected to an adsorption column device for decolorizing the liquid material in the second reaction tank, so that the inside of the container filled with a solid having an odor and dye molecule adsorption function is provided. To decolorize the colored centrifuged liquid, further adsorb odorant molecules, change the passed liquid into a completely transparent and odorless liquid, and complete the treatment.

Further, there is provided communication switching means for selectively and selectively switching communication between the gas part in the second reaction tank and the negative pressure generating means or the communication between the gas part in the first reaction tank and the negative pressure generating means. Thus, the negative pressure suction drive in the deodorizing step and the subsequent processing step can be processed by the common negative pressure pump, so that the overall configuration of the system can be reduced in size and the manufacturing cost can be reduced. In addition, the ammonia removal step can be performed while detecting the progress of the deodorization step performed in the initial stage, and power costs can be reduced.

Further, according to the method for deodorizing sludge liquid of the present invention, sludge liquid is introduced and negative pressure is generated in the gas part of the sealed first reaction tank in which the sludge liquid part and the gas part are formed inside. Means are communicated to generate a negative pressure, and the first reaction tank is provided with an adjusting cylinder having one end open to the atmosphere as an open hole and the other end having a plurality of holes formed in the sludge liquid portion. An opening / closing valve mechanism for opening and closing the opening hole in the adjusting cylinder, and opening and closing the opening hole of the adjusting cylinder to take in air into the sludge liquid from the hole of the adjusting cylinder and reduce the gas portion of the first reaction tank by the negative pressure generating means. By separating the odor component from the sludge liquid and raising it into the gas portion while maintaining the negative pressure in a predetermined range, the efficiency of taking in the undissolved odor component into the air by negative pressure suction is good, Sludge liquid deodorizing equipment can be miniaturized, and equipment cost Reducing the fine power costs, and the reduce the power load such as suction pump it is possible to simultaneously improve the deodorization efficiency per unit time.

Further, according to the method for treating animal raw urine of the present invention, the animal raw urine is charged, and the urine fluid and the gas are negatively applied to the gas in the first reaction tank in which the urine is formed. A negative pressure is generated by communicating the pressure generating means, and while the air is taken into the urine fluid part, the negative pressure of the gas part of the first reaction tank by the negative pressure generating means is maintained in a predetermined range, and the odor component is removed from the urine liquid part. A first step of being separated from the gas part, raised into the gas part, and suction-removed;
A second step of introducing a chemical solution that causes precipitation into the urine fluid in the first reaction vessel, a third step of solid-liquid separation of urine fluid containing precipitated solids in the first reaction vessel, and a third step. And a fourth step of introducing the ammonia-removing chemical solution into the separated liquid, so that the raw urine is deodorized by negative pressure suction treatment, and the solid matter after solid-liquid separation is collected and the liquid component is further separated. As a result of deodorization and decolorization, it is possible to specifically realize a processing cycle of animal raw urine and to specifically and continuously process solid, gas, and liquid components.

In the fourth step, the step of passing the liquid from which ammonia has been removed in the fourth step is passed through the adsorption column, so that the colored separation liquid is decolorized, and further, the odorant molecules are adsorbed and the passed liquid is removed. By changing the liquid to a completely transparent and odorless liquid, it is possible to complete the treatment of animal urine.

Further, according to the centrifugal separator for treating sludge liquid of the present invention, the sediment liquid which has been subjected to colloid precipitation by introducing a sedimentation flocculant is introduced, and the centrifugal separator for centrifuging the sludge liquid into a solid content and a liquid content. An outer cylinder, and a sludge liquid is provided inside the outer cylinder, which is disposed in a double cylinder shape with a gap between the outer cylinder and a plurality of holes formed in the peripheral side wall so as to be rotatable about the longitudinal direction as an axis. And a centrifugal rotary tank for introducing the, by having a discharge port provided at the inner bottom of the centrifugal rotary tank and capable of continuously discharging the solid content of the condensed sludge liquid, for example, in milk waste liquid and other sludge liquid Solids are continuously discharged from the outlet even during rotation of the centrifugal rotary tank, and liquids are discharged from the centrifugal rotary tank side, and solid-liquid separation can be performed continuously. And can be connected to the process before and after this device. Continuous operation of the device also becomes possible to be,
When the system is constructed, continuous operation of the whole system can be realized, and it is possible to greatly improve the whole processing time of sludge solution and the throughput per hour.

Further, the knitted filter cloth is arranged circumferentially on the inner wall of the centrifugal rotary tank of the centrifugal separator for sludge liquid treatment, so that the solid content in the sludge liquid is continuously discharged from the discharge port as it is. The liquid component is efficiently discharged and the liquid component is discharged from the centrifugal rotation tank side, so that solid-liquid separation can be continuously performed, and the continuous treatment of the sludge liquid treatment system can be concretely realized, and the solid component precipitated in the sedimentation flocculation tank The liquid adheres to the filter cloth in the centrifugal rotation tank where the liquid rotates, and the liquid in the sedimentation and coagulation tank, which is introduced later, performs the action of washing out this solid, and the solid can be discharged from the discharge port, and the centrifugal separation action can be performed. Can be realized.

In addition, the filter cloth is arranged narrowly between the inner wall of the centrifugal rotary tank and the filter cloth of the centrifugal separator for sludge liquid treatment, so that the filter cloth is disposed on the inner wall side of the centrifugal rotary tank. Since the knitted stitch portions move efficiently with centrifugal rotation without clogging, the clogging is reliably prevented, and the solid-liquid separation action is realized.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of the overall configuration of a sludge liquid treatment system according to a first embodiment of the present invention.

FIG. 2 is an enlarged vertical cross-sectional explanatory view of a centrifugal separator.

FIG. 3 is a block diagram of a gas pressure maintaining device.

FIG. 4 is an explanatory diagram of the entire configuration of a sludge liquid treatment system according to a second embodiment of the present invention.

DESCRIPTION OF SYMBOLS 10a, 10b Sludge liquid treatment system 12 Deodorizing device 13 First negative pressure reactor 14 Centrifugal separator 16 First reaction tank 18 Negative pressure generating means 19 Opening hole 20 Adjusting cylinder 22 Centrifugal rotary tank 24 Discharge port 34 first air-washing tank 36 second air-washing tank 92 filter cloth 94 spacer net 96 second reaction tank 98 second adjusting cylinder 100 ammonia removing chemical liquid unit 102 second negative pressure reactor 106 stirring blade unit 114 switching Valve 118 for adsorption column device

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4D037 AA12 AB02 AB04 AB05 AB12 AB15 BA23 BA28 BB04 CA01 CA02 CA08 CA14 4D057 AA12 AB01 AC02 AC06 AD01 AE02 AF01 BA19 BA41 BA43 BC11 4D059 AA01 AA02 AA03 BE31 BE38 BE49 BE55 BJB23J CA24 CA25 CB01 CB27 DA05 DA16 DA17 DA23 DA24

Claims (14)

[Claims] 1. A sealed first reaction tank in which a sludge liquid is charged and a sludge liquid part and a gas part are formed therein, and one end is opened to the atmosphere as an open hole and a plurality of holes are formed. A first negative pressure reactor having an adjusting cylinder with an on-off valve having an end arranged in a sludge liquid portion, and a negative pressure generating a negative pressure in the first reaction tank by communicating with a gas portion of the first reaction tank; Means,
And a centrifugal separator that communicates with the inner bottom of the first reaction tank and centrifugally separates the sludge into solids and liquids. A sludge liquid treatment system comprising: a centrifugal rotary tank having a plurality of holes formed in a side wall; and a discharge port provided at an inner bottom portion of the centrifugal rotary tank to continuously discharge solid content of the sludge liquid. 2. A first negative pressure reactor of a deodorizing device, a first gas washing tank for acid washing between the negative pressure generating means so as to perform a negative pressure suction action, and a second washing for alkaline washing. 2. The sludge liquid treatment system according to claim 1, wherein the air tank is connected in communication. 3. A sealed first reaction tank in which a sludge liquid is charged and a sludge liquid part and a gas part are formed therein, and one end is opened to the atmosphere with an open hole and a plurality of holes are formed. A first negative pressure reactor having an adjusting cylinder with an on-off valve having an end arranged in a sludge liquid portion, and a negative pressure generating a negative pressure in the first reaction tank by communicating with a gas portion of the first reaction tank; Means,
And a centrifugal separator that communicates with the inner bottom of the first reaction tank and centrifugally separates the sludge into solids and liquids. A centrifugal rotary tank with a plurality of holes formed in the side wall, and a discharge port provided at the inner bottom of the centrifugal rotary tank to continuously discharge the solid content of the sludge liquid. A sludge liquid treatment system which is housed in a cylindrical shape and is provided rotatably about a vertical direction, and a knitted filter cloth is circumferentially arranged on the inner wall of the centrifugal rotary tank. 4. The sludge liquid treatment system according to claim 3, wherein a spacer mesh is narrowly arranged between the inner wall of the centrifugal rotary tank and the filter cloth. 5. The sludge liquid is raw urine of an animal or the like, and the centrifugal separator is charged with the centrifuged liquid separated by the centrifugal separator, and a liquid part and a gas part are sealed inside. A second reaction tank having an open / close valve with an open / close valve and one end opened to the atmosphere with an open hole, and the other end having a plurality of holes formed therein is arranged in a centrifuged liquid. The sludge liquid treatment system according to claim 3 or 4, wherein a second negative pressure reactor having a chemical unit is connected. 6. The sludge liquid treatment system according to claim 3, further comprising a stirring means for stirring the liquid portion in the second reaction tank. 7. The second reaction tank is connected to an adsorption column device for decolorizing the liquid in the second reaction tank.
7. A sludge liquid treatment system according to any one of claims 6 to 6. 8. A communication switching means for selectively and selectively switching communication between the gas portion in the second reaction tank and the negative pressure generating means or the communication between the gas portion in the first reaction tank and the negative pressure generating means is provided. A sludge liquid treatment system according to any one of claims 3 to 7. 9. A negative pressure generating means is connected to a gas part of a sealed first reaction tank in which a sludge liquid is supplied and a sludge liquid part and a gas part are formed, thereby generating a negative pressure. One reaction tank is provided with an adjustment cylinder having one end open to the atmosphere as an open hole and the other end having a plurality of holes perforated in a sludge liquid portion, and an opening / closing valve for opening and closing the open hole in the adjustment cylinder. A mechanism is provided. By opening and closing the opening of the adjusting cylinder, air is introduced into the sludge liquid from the opening of the adjusting cylinder and the odor component is maintained while maintaining the negative pressure of the gas part of the first reaction tank in the predetermined range by the negative pressure generating means. A method for deodorizing sludge liquid by separating water from the inside of the sludge liquid and raising it into the gas part. 10. Negative pressure is generated by feeding a raw animal urine and communicating a negative pressure generating means to a gas portion of a sealed first reaction tank in which a urine fluid portion and a gas portion are formed. The odorous component is separated from the urine fluid part, is taken up in the gaseous part, and is sucked and removed while maintaining the negative pressure of the gas part of the first reaction tank in the predetermined range by the negative pressure generating means while taking air into the urine liquid part. A first step, a second step of introducing a chemical solution that causes precipitation into the urine fluid in the first reaction vessel, a third step of solid-liquid separation of urine fluid containing precipitated solids in the first reaction vessel, A fourth step of charging the liquid removed in the three steps with the ammonia-removing drug solution. 11. The method for treating animal raw urine according to claim 10, further comprising the step of passing the liquid from which ammonia has been removed in the fourth step through an adsorption column. 12. A centrifugal separator for introducing a coagulant into which a sedimentation flocculant is introduced and introducing a sludge liquid which is colloidally precipitated, and centrifuging the sludge liquid into a solid content and a liquid content. A centrifugal rotary tank that is arranged in a double cylindrical shape with a gap, is provided with a plurality of holes in the peripheral side wall, is rotatably provided about a longitudinal direction, and introduces sludge liquid into the inside, A sludge liquid treatment centrifugal separator provided at an inner bottom of a tank and capable of continuously discharging solid matter of condensed sludge liquid. 13. The centrifugal separator for treating sludge liquid according to claim 12, wherein the knitted filter cloth is circumferentially arranged on the inner wall of the centrifugal rotary tank. 14. The centrifugal separator for treating sludge liquid according to claim 12, wherein a spacer mesh is narrowly arranged between the inner wall of the centrifugal rotary tank and the filter cloth.