JPH10146595A - High concentration organic drain treatment system and drain treatment method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a treatment system for decomposing and digesting organic matters in an organic drain without excessive sludge or compost by the aerobic fermentation and discharging the organic drain into rivers, lakes and ponds and also provide a treatment method thereof. SOLUTION: Raw water as an organic drain before the treatment is fed from a tank upper section into microorganism carriers 15 stored in a primary treatment tank 1 with an agitation device 20, and the raw water is flowed down into the microorganism carrier in the tank and the organic matters in the raw water are made to adhere to the microorganism carriers. Also primary treated water drained from the primary treatment tank 1 is fed from the tank upper section into the microorganism carriers 25 stored in a secondary treatment device 2 with an air feed device 29 for feeding air into the tank, and the primary treated water flows down into the microorganism carriers in the tank and the organic matters in the primary treated water are made to adhere to the microorganism carriers, and water after the treatment from which the organic matters are removed is drained, and the raw water supply stop period for discontinuing the supply of raw water into the primary treatment tank and the supply of primary treated water into the secondary treatment tank is provided to decompose and digest almost completely the organic matters adhered to the microorganism carriers in respective treatment tanks by the aerobic fermentation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system and a method for treating high-concentration organic wastewater by high-temperature, aerobic fermentation without decomposing and digesting it to produce excess sludge and compost.

[0002]

2. Description of the Related Art Organic wastewater such as human waste from livestock facilities, wastewater from food processing factories, or household wastewater from general households has become a problem as a cause of pollution of rivers and lakes. Activated sludge method, solid-liquid separation method, and the like have been conventionally used as a method for treating organic wastewater, and these treatment methods are mainly used in treatment facilities such as sewage treatment plants.

However, the activated sludge method and the solid-liquid separation method cannot completely decompose the organic matter in the organic wastewater, and a large amount of excess sludge is generated after the treatment. Conventionally, excess sludge is incinerated or landfilled for disposal, but such a disposal method may cause new environmental destruction such as air pollution and soil pollution.

[0004] Further, there is an apparatus or method for composting organic wastewater by mixing it with a microorganism carrier and subjecting it to high-temperature, aerobic fermentation.
The composting requires frequent replenishment of the microbial carrier, resulting in high running costs. Further, since a large amount of compost is produced, disposal of the compost becomes a problem unless it is adjacent to an agricultural area.

In order to decompose organic substances into carbon dioxide, ammonia, water, inorganic salts and the like without producing compost or excess sludge, aerobic bacteria, which are microorganisms carried on a microorganism carrier, are actively activated and propagated. It is necessary to supply sufficient air (oxygen) to the aerobic bacteria, keep the moisture content of the microbial carrier in an appropriate range, and keep the temperature at a temperature suitable for fermentation (60 to 70 ° C). Must.

If the above-mentioned conditions of air, water, and temperature are not satisfied, anaerobic bacteria will propagate instead of aerobic bacteria, and the anaerobic bacteria will generate excess sludge, making it impossible to completely decompose organic matter. Fermentation stops due to the cessation or death of the aerobic bacteria.

[0007] Wood fragments, which are microbial carriers, have a fine space in the fiber, which retains the water necessary for the activity of the microorganisms and inhabits the microorganisms. If compost or excess sludge remains attached, or if the amount of surrounding water is excessive, the fine space of the wood strips is blocked and microorganisms cannot live there, resulting in excess sludge. Decomposition of organic matter when microbial carrier becomes excess sludge,
There is a problem that the digestion treatment capacity is reduced and that the microorganism carrier needs to be replenished.

[0008]

An object of the present invention is to decompose and digest organic substances in organic wastewater without causing excess sludge or compost by aerobically fermenting high-temperature, aerobic fermentation by vigorously activating and breeding aerobic bacteria as microorganisms. It is an object of the present invention to provide a treatment system and a treatment method capable of treating and turning organic wastewater into water that can be discharged to rivers and lakes.

[0009]

In order to achieve the above object, a high-concentration organic wastewater treatment system according to the present invention stores raw water as an organic wastewater before treatment, and a first storage tank having a raw water pump in the tank, and a first storage tank and a first storage tank. It has a water supply section for raw water and a discharge section for treated water, and the other end of the water supply pipe, one end of which is connected to the raw water pump, is connected to the water supply section, and the microorganism carrier is accommodated in the tank,
A primary treatment tank provided with a stirring device for stirring the microorganism carrier, and the other end of a water supply pipe having one end connected to an outlet of the primary treatment tank are connected, and the primary treatment water from the primary treatment tank is supplied to the primary treatment tank. A second storage tank for storing and having a primary treatment water pump in the tank, a primary treatment water supply part and a treated water discharge part above and below, respectively, and one end of the primary treatment water pump is connected to the primary treatment water pump. The other end of the connected water pipe is connected to the water supply unit, the microorganism carrier is accommodated in the tank, and air from a blower provided outside the tank is dispersed through the air supply pipe into the microorganism carrier in the tank. It has a structure including a secondary processing tank provided with an air supply device for sending air to the vent.

In the first embodiment of the treatment system, the raw water pump and the stirring device of the primary treatment tank are each driven and controlled by a timer, and the stirring device is driven only while the driving of the raw water pump is stopped. Configuration. In a second embodiment of the processing system, the air supply device of the secondary processing tank is always driven.

In a third embodiment of the treatment system, the discharge part of the primary treatment tank is provided with a drainage groove formed on the inner bottom surface of the treatment tank by a water-permeable partition member and separated from the microorganism carrier. One end is provided with an outlet for treated water. A fourth embodiment of the processing system has a structure in which a heater is provided on the inner bottom surface of the primary processing tank.

[0012] In the method for treating high-concentration organic wastewater according to the present invention, raw water as organic wastewater before treatment is supplied from the upper part of the tank to the microorganism carrier accommodated in the primary treatment tank provided with the stirring device, and the raw water is treated. The organic matter in the raw water is allowed to flow down into the microbial carrier in the tank to cause the organic matter in the raw water to adhere to the microbial carrier. Further, the microbial carrier accommodated in the secondary processing tank having an air supply device into the tank is subjected to the primary treatment tank. The primary treatment water discharged from the tank is supplied from the upper part of the tank, the primary treatment water is allowed to flow down into the microorganism carrier in the tank, and the organic matter in the primary treatment water is attached to the microorganism carrier.
The water after the treatment from which the organic substances have been removed is discharged, and a required water supply suspension period is provided to suspend the supply of the raw water to the primary treatment tank and the supply of the primary treatment water to the secondary treatment tank. It is characterized in that organic matter attached to the microbial carrier in the tank is almost completely decomposed and digested by high-temperature, aerobic fermentation.

The first embodiment of the processing method is the first of the processing.
The cycle is 7 days, raw water is supplied to the first treatment tank for the first to fourth days, water supply suspension period is set to the fifth to seventh days, and the first to fifth days are supplied to the secondary treatment tank. Supplies the primary treated water, and the sixth and seventh days are water supply suspension periods.

In a second embodiment of the treatment method, the agitation device for the primary treatment tank is used for the sixth and the third time during the suspension of water supply to the treatment tank.
Drive only on day 7. In a third embodiment of the processing method, the air supply device of the secondary processing tank is constantly driven regardless of the processing cycle.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a high-concentration organic wastewater treatment system according to an embodiment of the present invention. The processing system according to the present invention comprises two processing tanks containing organic matter in high-concentration organic wastewater (hereinafter referred to as raw water) from a wastewater source such as a livestock facility or a food processing factory, containing a microbial carrier made of wood chips or the like. A first storage tank 3 for storing raw water, a primary storage tank 1, a second storage tank 4 for storing primary processing water from the processing tank, The secondary treatment tank 2 is connected with a water pipe in this order for 5 minutes.
a, 5b, and 5c, the treatment system of the present embodiment further includes a water collecting tub 7, a tertiary treatment tub 8, and an inspection tub 9, and the water supply pipe 6a from the secondary treatment tub 2 in this order. , 6
b, 6c.

The inside of the first storage tank 3 is divided into a sand settling tank 3a and a raw water pump tank 3b by a partition wall 10, and a raw water inflow pipe 11 from a drainage source is connected to a side wall on the sand setting tank 3a side. The settling tank 3a and the raw water pump tank 3b are communicated with each other by a communication pipe 12, and a raw water pump 13 driven and controlled by a timer is provided in the raw water pump tank 3b.
One end of a water pipe 5a is connected to the raw water pump.

The volume of the sand settling tank 3a is about 0.5 times the volume of one day of raw water discharged from the drainage source, and the volume of the raw water pump tank 3b stores at least four times the volume of one day of raw water. There are things you can do. The reason why the volume of the raw water pump tank 3b is determined as described above is that a three-day water supply suspension period of the raw water can be taken in the embodiment of the processing method described later.

The primary treatment tank 1 has, for example, a microorganism carrier 15 in an elongated box-shaped tank main body 14 having a width of 4.5 m, a length of 33 m, and a depth of about 1.5 m. A drain groove 16 having a depth of about 10 cm, which is a discharge part of the treated water, is provided in the longitudinal direction of the inner bottom surface of the tank body 14.

The drainage groove 16 is slightly inclined downward to the second storage tank 4 side, and the upper part is partitioned by a water-permeable partitioning member 17, which allows water to permeate, but transfers the microorganism carrier in the tank to the drainage groove. I have tried not to leak it. The partition member 17 is made of, for example, a punch metal made of stainless steel and having a large number of holes of about 1.2 mm.

A flat electric heater 18 is provided on the bottom surface of the inside of the tank body around the drainage groove 16, and even if the outside air temperature is low, the inside of the tank is heated to a required temperature suitable for fermentation by a thermostat, for example, 60 ° C. It can be maintained at ~ 70 ° C. Note that, instead of the electric heater 18, a heater utilizing waste heat from a factory or the like may be provided.

Guide rails 19 are provided at the upper edges of both side walls extending in the longitudinal direction of the tank body 14, and a self-propelled stirring device 20 for stirring the microorganism carrier 15 is provided on the guide rails. Is provided. The stirrer 20 is driven and controlled by a timer. The stirrer 20 includes a number of stirrers 20b, 20b extending radially around the rotation shaft 20a. The drive mechanism 20c rotates the rotation shaft 20a to guide rails 19, 19. You can travel back and forth on the top. The driving mechanism 2
Since 0c has various structures, the description is omitted.

The upper part of the tank body 14 is covered with a cover body 21 to prevent rainwater or the like from entering the tank or lowering the inside temperature of the tank. The structure has a structure in which a waterproof sheet 21c is covered on a support 21b erected on an anchor 21a.

On the inner surface of the upper part of the cover body 21, the tank body 14 is provided.
A sprinkling pipe 22 is provided in the longitudinal direction of the water to be treated, and a base end of the sprinkling pipe is connected to a water supply pipe 5 from the first storage tank 3.
a, so that raw water can be evenly sprayed to the microbial carriers in the tank from a number of water spouts opened in the lower surface of the water sprinkling pipe 22.

A drain 16a is formed at one end of the drain groove 16 on the side of the second storage tank 4, and one end of a water pipe 5b is connected to the other end of the water pipe 5b. 4 is connected.

The second storage tank 4 is for temporarily storing the primary treatment water from the primary treatment tank 1 described above and sending the primary treatment water to the secondary treatment tank 2. The primary treatment water is driven and controlled by a timer. A pump 23 is provided, and the volume of the second storage tank 4 is about 1.75 times the volume of one day of raw water discharged from the drainage source.
More than twice as many can be stored. The reason why the volume of the second storage tank 4 is determined as described above is that seven days of raw water is equally supplied to the primary processing tank 1 in four days in an embodiment of the processing method described later.

The primary treatment water pump 23 has a water supply pipe 5c.
And one end of the water pipe is connected to the secondary treatment tank 2. The secondary treatment tank 2 has a depth of 3.5 to 4.
0 m, the bottom and the inner peripheral surface of the hole dug so that the opening is about 5.5 m square are covered with an impermeable material 24 such as a vinyl sheet. Is covered with a lid 26 made of, for example, a stainless steel material.
7 is provided, and this watering cylinder is formed in a cylindrical shape with a bottom and a bottom protruding upward from the lid, and a water supply pipe from the second storage tank 4 is provided on the protruding upper part of the watering cylinder 27. 5c
Is connected.

Numerous holes for watering are provided in the lower side surface of the watering tube 27, and a partition plate 28 made of, for example, a stainless steel plate is provided around the side surface, and an overflow space is provided around the upper half of the watering tube 27. A is provided.

The secondary processing tank 2 has a blower 29 provided outside the tank.
And an air supply device following the air diffuser pipes 31 provided in the tank from the blower via the air supply pipe 30, and a number of air diffusers opened in the air diffuser pipes 31 and 31 to the microorganism carrier. We make sure to send enough air.

The aeration pipes 31, 31 are used for the microorganism carrier 2
5 between about 0.5 to 2.5 m from the bottom inside the processing tank
Steps are provided, both of which are formed in a horizontal loop shape (quadrilateral shape in FIG. 7) following the shape of the inner periphery of the processing tank so that air from the blower is supplied evenly and sufficiently to the microorganism carrier. It is.

A water collecting pipe 32 is provided on the inner bottom surface of the secondary processing tank 2 along the inner periphery of the processing tank and serves as a discharge portion of water after treatment. Is provided with a large number of holes having a diameter such that the microorganism carrier 25 does not flow out, so that only secondary treatment water in which organic substances are decomposed in the secondary treatment tank can be discharged to the outside.

The other end of the water pipe 6a, one end of which is connected to the outlet 32a of the water collecting pipe 32, is connected to the side surface of the water collecting tub 7. A secondary treatment water pump 33 that is driven when the water reaches a predetermined water level is provided. The other end of the water supply pipe 6 b having one end connected to the pump is connected to a water supply port 8 a of the tertiary treatment tank 8.

The tertiary treatment tank 8 is filled with activated carbon 34, and the secondary treatment water flowing from the water supply port 8a at the upper part of the tank is brought into contact with the activated carbon to remove a small amount of organic substances remaining in the secondary treatment water. The odor or the like is adsorbed and removed and discharged from the outlet 8b. The other end of the water pipe 6c, one end of which is connected to the outlet 8b, is connected to the side surface of the check box 9.

The inspection tub 9 is for confirming whether or not the treated water has a required water quality. A sample can be periodically taken from the inspection tub to inspect the water quality. The treated water is discharged from the check basin to a river or the like by the discharge pipe 35.

In addition to the discharge pipe 35, one end of a return water pipe 36 is connected to the check box 9, and the other end of the return water pipe 35 is connected to the raw water pump tank 3b of the first storage tank 3. The discharge pipe 35 is provided with a valve 37 which is normally opened but is closed when the water quality is abnormal, and the return water pipe 36 is normally closed but opened when the water quality is abnormal. A valve 38 is provided.

In the system of the present embodiment described above, 2
The next treatment tank 2 is buried underground.
It can also be provided on the ground. The reference numeral 39 in the figure
43 is a settling tank 3a, a raw water pump tank 3b,
The lids for maintenance of the storage tank 4, the water collecting basin 7, and the inspection basin are shown.

Next, the operation of the system having the above configuration will be described. Raw water from the drainage source is first discharged by the raw water inflow pipe 11
Inorganic substances such as sand mixed in the raw water flow into the sedimentation tank 3a of the storage tank 3, and are separated by sedimentation. Only the supernatant of the sedimentation tank 3a, that is, raw water from which the inorganic substances are separated, is connected to the connecting pipe 12a.
Flows into the raw water pump tank 3b.

The raw water in the raw water pump tank 3b is the raw water pump 1
By the drive of 3, the water is sent to the sprinkling pipe 22 of the primary treatment tank 1 through the water pipe 5a, sprayed from the sprinkling port to the microorganism carrier 15 in the tank body 14, and flows down in the tank while contacting the microorganism carrier.

At this time, organic matter such as sludge contained in the raw water adheres to the microorganism carrier 15, and water from which the organic matter has been considerably removed flows through the hole of the partition member 17, flows into the drainage groove 16, and flows through the discharge port 16a. Is discharged. On the other hand, microorganism carrier 1
The organic matter adhering to 5 is heated to a temperature suitable for fermentation by heater 18 and completely decomposed and digested into carbon dioxide, ammonia, water and inorganic salts by high-temperature, aerobic fermentation.

Further, the microorganism carrier 15 is stirred by driving the stirring device 20. This stirrer reciprocates along the entire length of the primary processing tank 1 in the longitudinal direction while stirring the stirrers 20b, 2b.
The microbial carrier is loosened by 0b to break up the microbial carrier mass and to send air necessary for fermentation to all the microbial carriers.

The primary treated water from the primary treatment tank 1 is supplied to a water pipe 5
b, it is sent to the second storage tank 4 and temporarily stored. The primary treated water in the second storage tank 4 is driven by the primary treated water pump 23 through the water supply pipe 5c to spray the water in the secondary treatment tank 2
Sent to

The primary treated water that has flowed into the sprinkler tube 27 flows into the tank from a number of holes formed in the side surface of the sprinkler tube 27, and organic matter in the primary treated water adheres to the microorganism carrier 25, and almost all of the organic matter is removed. The removed water is sent from the hole made in the water collecting pipe 32 to the water collecting basin 7 through the water pipe 6a through the pipe.

When the amount of water supplied to the watering cylinder 27 is large, the primary treated water flows out of the hole in the upper half of the watering cylinder 27 into the overflow space A once, and then passes through the watering cylinder through the watering cylinder. From the lower half to the microbial carrier so that a large amount of primary treated water does not flow into the secondary treatment tank at one time.

Air sent from the blower 29 through the air supply pipe 30 and the air diffuser pipes 31, 31 is constantly supplied into the secondary processing tank 2, so that fermentation of organic substances is actively performed.

The secondary treated water is temporarily stored in the collecting basin 7 and, when the water level reaches a certain level, is sent to the tertiary treatment tank 8 via the water supply pipe 6b by driving the secondary treated water pump 33. The secondary treatment water sent into the tertiary treatment tank 8 flows down while contacting the activated carbon 34 in the tank, and a small amount of organic substances and odor remaining in the secondary treatment water are adsorbed and removed and discharged from the outlet 8b. Is sent to the check box 9 via the water pipe 6c.

The tertiary effluent sent to the inspection tub 9 is discharged to a river or the like by a discharge pipe 35 through a valve 37 which is normally opened. If the quality of the tertiary treated water in the inspection tub 9 is abnormal, the valve 37 of the discharge pipe 35 is closed and the valve 38 of the return water pipe 36 is opened to store the tertiary treated water in the first storage tank 3. To the raw water pump tank 3b.

In the above-described embodiment, the tertiary treatment tank 8 filled with the activated carbon 34 is provided. However, the tertiary treatment may not be the adsorption treatment with the activated carbon, but may be the activated sludge method, the underground infiltration method, or the electric treatment. Alternatively, it may be carried out by a method of removing by adsorption.

Next, an embodiment of a processing method according to the present invention based on the above-described processing system will be described with reference to a time chart shown in FIG. In the processing method of the present invention,
A water supply suspension period is provided to both the processing tanks 1 and 2 so that decomposition and digestion of organic matter by high temperature and aerobic fermentation in the primary processing tank 1 and the secondary processing tank 2 are extremely well and actively performed.

The raw water supplied to the primary treatment tank 1 and the primary treatment water supplied to the secondary treatment tank 2 are temporarily stored in a first storage tank 3 and a second storage tank 4, respectively.
The raw water pump 13 and the primary treated water pump 23 of each of the storage tanks 3 and 4 are controlled by a timer whose driving time is set in advance.

In the method of this embodiment, water is supplied to the primary treatment tank 1 only for four days on the first to fourth days, with seven days as one cycle of treatment, and the following three days are defined as water supply suspension periods, Water supply to the processing tank 2 is performed only for five days on the first to fifth days, and the subsequent two days are a water supply suspension period.

Water is supplied to the primary treatment tank 1 in the morning of the first to fourth days by driving the raw water pump 13 for 30 to 60 minutes. The amount of water supply will be approximately 1.75 times the amount of raw water discharged from wastewater sources each day.

The drive start time of the raw water pump 13 is preferably around 9:00 am when the outside air temperature rises to some extent. If it is earlier than this time, the temperature of the raw water is low and the fermentation temperature in the primary treatment tank is difficult to increase. If the start time is too late, the processing in the primary processing tank cannot be completed during the day when the outside air temperature is high.

On the fifth to seventh days, the raw water pump 13 is not driven as a water supply suspension period. On the fifth day of the rest period, the excess water remaining in the tank is discharged as the day of drainage of the primary treatment tank, and the water in the tank is limited to the amount of water retained by the microorganism carrier 15.

On the 6th and 7th days, the stirring device 20 is driven for 1 to 2 hours in the morning to loosen the microorganism carrier 15,
Ensure that sufficient air is available to the microbial carrier. The drive start time of the stirrer 20 is preferably around 9:30 am, and the stirring is performed before the outside temperature rises and the activity of the microorganisms becomes active.

The microorganism carrier 15 in the primary treatment tank 1 from which the raw water has flowed down on the first to fourth days is left with the organic matter attached thereto in an amount exceeding the decomposition ability of the carrier. In some cases, the water supply is suspended, and the organic matter is almost completely decomposed and digested during this period, and the lump is loosened by driving the stirring device 20 to recover the air permeability. . In addition, since the organic matter that closes the fine space of the wood chips serving as the microorganism carrier is decomposed and digested during the suspension of water supply, the microorganism carrier is refreshed.

Water is supplied to the secondary treatment tank 2 by driving the primary treatment water pump 23 in the second storage tank on the first to fifth days, and about 1% of the amount of raw water discharged from the drainage source in one day. Water 4 times. The timer for the primary treatment water pump 23 is set so as to be driven six times at intervals of two hours so that water supply to the secondary treatment tank 2 is not performed at one time. On the sixth and seventh days, the primary treatment water pump 23 is not driven as a water supply suspension period, and the water content of the microorganism carrier 25 in the secondary treatment tank is reduced.

On the first to fifth days, the microorganism carrier 25 in the secondary treatment tank 2 from which the primary treatment water has flowed down still has organic matter attached thereon in an amount exceeding the decomposition ability of the carrier. Although a part of the mass may be agglomerated and the air permeability may decrease, the organic matter is almost decomposed and digested during the water supply suspension period, and sufficient air is sent from the blower 29 to the microorganism carrier. The microorganism carrier is refreshed similarly to the microorganism carrier in the primary treatment tank. In addition, the blower 29 is always operated throughout the first to seventh days,
Always supply a sufficient amount of air into the secondary processing tank.

The high-concentration organic wastewater mainly composed of human waste discharged from the pig farm was decomposed and digested by the method of the above-described embodiment, and a tertiary treated water sample was collected from the raw water to examine the water quality. The results shown in Table 1 were obtained. In addition, BOD, SS, CO
The unit of each measurement data of D, normal hexane extract substance content is mg / liter.

[0058]

[Table 1] As shown in Table 1 above, a considerable amount of organic substances have already been removed from the measurement results of the secondary treatment water, and the measurement results indicating the pollution degree of the water quality are extremely low in the measurement results of the tertiary treatment water. It is a level that can sufficiently clear the discharge standard for rivers etc. (varies depending on the area).

According to the above-described method, the suspension period of water supply to the primary treatment tank and the secondary treatment tank is provided, so that the microorganism carrier in the tank is refreshed during the suspension of water supply and hardly deteriorates. Therefore, the microbial carrier can be used for a long time without replenishment or replacement, but it is desirable to replace the microbial carrier about once every two years so as not to reduce the processing capacity.
The microbial carrier after use can be washed, dried, and reused by stirring about once a month for about 6 months.

[0060]

The high-concentration organic wastewater treatment system and the wastewater treatment method according to the present invention can provide the following effects by the above-described configuration. The organic matter in the raw water is removed to some extent by contacting the microorganism carrier in the primary treatment tank, and the water after the treatment in the primary treatment tank is further contacted with the microorganism carrier in the secondary treatment tank to reduce most of the organic matter in the wastewater. Since it is removed, the organic matter concentration in the high-concentration organic wastewater can be treated to a remarkably low level, and high-quality water can be discharged to rivers and lakes.

The organic substances adhering to the microorganism carrier in the primary treatment tank and the secondary treatment tank are decomposed and digested by high-temperature, aerobic fermentation by microorganisms, and do not generate compost or excess sludge.

Therefore, it is not necessary to treat compost and excess sludge as in the conventional treatment method, and the compost and excess sludge discharged by the conventional treatment method are decomposed and digested by the treatment system and treatment method of the present invention. You can also.

In addition, in the treatment method of the present invention, a suspension period of water supply to the primary treatment tank and the secondary treatment tank is provided, so that organic substances adhering to the microorganism carrier are decomposed and digested during the suspension of water supply. The water retention of the microbial carrier and the function as a habitat of the microbe are refreshed, and the processing ability of the organic matter is not reduced. Also, since the microorganism carrier is refreshed, there is almost no need to replenish and replace the microorganism carrier,
Maintenance is easy and running costs can be reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of a processing system according to the present invention.

FIG. 2 is a vertical sectional view of a first storage tank.

FIG. 3 is a vertical sectional front view of a primary treatment tank.

FIG. 4 is a vertical side view of a primary treatment tank.

FIG. 5 is a longitudinal sectional view of a second storage tank.

FIG. 6 is a longitudinal sectional view of a secondary treatment tank and a catchment basin.

FIG. 7 is a horizontal sectional view of a secondary processing tank.

FIG. 8 is a vertical cross-sectional view of a tertiary treatment tank and a check box.

FIG. 9 is a time chart showing an embodiment of the processing method according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Primary treatment tank 2 Secondary treatment tank 3 First storage tank 3a Sedimentation tank 3b Raw water pump tank 4 Second storage tank 5a, 5b, 5c Water supply pipe 6a, 6b, 6c Water supply pipe 7 Water collecting basin 8 Third treatment tank Reference Signs List 9 inspection box 10 partition wall 11 raw water inflow pipe 12 connecting pipe 13 raw water pump 14 tank body 15 microorganism carrier 16 drainage groove 16a discharge port 17 partition member 18 heater 18 19 guide rail 20 stirring device 20a rotating shaft 20b stirring material 20c driving mechanism 21 Cover 22 Sprinkler tube 23 Primary treatment water pump 24 Impermeable material 25 Microbial carrier 26 Lid 27 Sprinkler tube 28 Partition plate 29 Blower 30 Air supply pipe 31 Air diffusion pipe 32 Water collection pipe 33 Secondary treatment water pump 34 Activated carbon 35 Discharge pipe 36 Return water pipe 37, 38 Valve 39 ... 43 Lid A Overflow space

Claims (2)

[Claims] (1) storing raw water as an organic wastewater before treatment,
A first storage tank provided with a raw water pump in the tank; (b) a raw water supply section and a treated water discharge section above and below respectively, and the other end of a water supply pipe having one end connected to the raw water pump and A primary treatment tank connected to the tank and containing a microorganism carrier in the tank, and provided with a stirrer for stirring the microorganism carrier. (C) The other end of the water supply pipe having one end connected to the discharge part of the primary treatment tank. Is connected and stores the primary treatment water from the primary treatment tank, and a second storage tank provided with a primary treatment water pump in the tank. (D) The primary treatment water supply section and the treated water And a water supply pipe having one end connected to the primary treatment water pump, the other end connected to the water supply unit, a microorganism carrier accommodated in a tank, and air from a blower provided outside the tank. A secondary treatment tank equipped with an air supply device that sends air to an aeration port provided in the microbial carrier in the tank via an air supply pipe High concentration organic wastewater treatment system. 2. Raw water, which is an organic wastewater before treatment, is supplied from the upper part of the tank to the microorganism carrier accommodated in the primary treatment tank provided with the stirring device, and the raw water is allowed to flow down into the microorganism carrier in the tank so that the raw water is removed. The organic matter is allowed to adhere to the microorganism carrier, and further, the primary treated water discharged from the primary treatment tank is transferred from the upper part of the tank to the microorganism carrier accommodated in the secondary treatment tank having an air supply device into the tank. The primary treated water is allowed to flow down into the microbial carrier in the tank to allow the organic matter in the primary treated water to adhere to the microbial carrier, and the treated water from which the organic matter has been removed is discharged.
A required water supply suspension period is provided to suspend the supply of raw water to the secondary treatment tank and the supply of primary treatment water to the secondary treatment tank, and the organic substances adhering to the microbial carriers in each treatment tank are subjected to high-temperature, aerobic fermentation. A method for treating high-concentration organic wastewater, characterized in that it is completely decomposed and digested.