JP2001070746A - Deodorization method and apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deodorization apparatus capable of deororizing a large quantity of malodorous gases at a low cost using sludge (wastewater) generated in a wastewater treatment site and humus (soil) and keeping highly efficient and durable deodorization effects. SOLUTION: A deodorization tank 2 is provided with a gas diffusing diffuser 7 installed in the lower part for diffusing a malodorous gas G in sludge X in a bubble state, a sludge layer X stored therein, a water-permeable container 12 hung in the sludge layer X for storing a granular material of humus, a defoaming mechanism 18 for supplying activated sludge X upward through a circulation pump 15 from a sludge discharge pipe 14 and spraying the sludge X to the upper face of the sludge layer X, and a gas discharge cylinder 5 connected with a gas discharge port 4 formed in the ceiling thereof and containing an activated carbon-packed layer 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to deodorizing various organic odors such as garbage and odors generated in garbage disposal machines, garbage disposal plants, garbage incineration plants, human waste treatment plants, and the like. And a deodorizing device therefor.

[0002]

2. Description of the Related Art In recent years, the treatment of garbage has become a problem, and various garbage processors have been developed. In the case of this type of processor, the internal temperature rises to 50 to 70 ° C. due to the fermentation / decomposition treatment of garbage. For this reason, in addition to the generation of offensive odor from the processing machine, there is a problem that water generated from garbage is generated as dew condensation water in a pipe or the like for supplying odor, and the dew condensation water generates a malodor.

[0003] Conventionally, a method of spraying a chemical agent to chemically react with odor components to neutralize and deodorize such malodors is generally used.

[0004] Other prior arts include Japanese Patent Application Laid-Open No. 8-16441.
As described in JP-A-92-92, several kinds of plants are used as raw materials and their leaves and stems are obtained through the steps of vacuum distillation or squeezing, vacuum distillation, purification, decolorization, and aging. A vegetable deodorant has been proposed in which superoxidized water diluted with water is added to a deodorant extract and mixed.

[0005]

However, the above-mentioned conventional method for deodorizing with a deodorant comprising a chemical agent has the following problems.

[0006] Since the generated odor component is chemically neutralized and deodorized, in other words, the source of the odor component is not cut off from the root, so there is no persistence.
Frequent application of chemicals is required.

[0007] Since it is a chemical agent, if it is used for a long time, it may harm the surrounding environment.
It can also have a negative effect on animals and plants.

[0008] In the case of the plant deodorant described in the above publication, the production process is complicated and is not suitable for mass production.
Very short, about a month.

[0009] In particular, it is difficult to sufficiently eliminate the odor by the method of chemically neutralizing and deodorizing the above-mentioned garbage and dew condensation water generated from the garbage disposal machine by using a chemical. In addition, the amount of garbage is enormous, and responding with chemicals is a problem not only in terms of cost but also in terms of the social environment.

The present invention has been made in view of the above points, and it is possible to use a sludge (sewage) and a humus (soil) generated at a sewage treatment plant to deodorize a large amount of odorous gas at a low cost. It is an object of the present invention to provide a deodorizing method and a deodorizing device which have high effects and have a high sustainability.

[0011]

Means for Solving the Problems To achieve the above object, a deodorizing method according to the present invention comprises storing sludge in a deodorizing tank,
With the humus (including humus) of 0.5 to 1.0% by weight added to the sludge and activated, air is introduced into the sludge in the deodorization tank to perform initial adjustment by air stirring. After activating and stabilizing the sludge, odor gas generated from garbage and the like is introduced into the sludge in the deodorization tank in the form of fine bubbles, and comes into contact with the activated sludge. The odor gas is decomposed and deodorized.

[0012] According to the deodorizing method of the present invention having the above-described structure, the soil bacteria group (humid anaerobic bacteria, aerobic bacteria, or facultative bacteria) in the humus introduced into the sludge stored in the deodorizing tank. An anaerobic bacterium and an aerobic bacterium group are cultivated using various components in the sludge as a nutrient source. On the other hand, sludge is matured and activated by propagation of soil fungi. Bacteria in the soil fungi naturally produce metabolites (secretions), but the metabolites have a deodorizing component, that is, an odor removing component, so that the deodorizing function can be exerted. In addition, since secretions produced by soil bacteria such as aerobic and facultative anaerobic bacteria have a bactericidal action and an antibacterial action, not only a deodorizing effect but also an antibacterial effect occur simultaneously. Furthermore, humus is used because it has a particularly high content of aerobic and facultative anaerobic bacteria to prevent the growth of spoilage bacteria, and it is possible to obtain high-quality humus relatively easily and inexpensively.

According to the deodorizing method of the present invention, the odor gas introduced into the activated sludge stored in the deodorizing tank is diffused and dispersed, and efficiently comes into contact with each other. By reacting with deodorizing components possessed by metabolites produced by bacteria of the bacteria group to fix volatile substances, which are malodorous components, and to further decompose to prevent emission of odor components, Deodorizes. In addition, when the input ratio of humus to sludge is less than 0.5%, the activation of sludge is delayed. Therefore, in order to efficiently activate sludge in a short period of time, it is necessary to be 0.5% or more.
On the other hand, although there is no problem if it exceeds 1.0%, it is preferable to set it to about 1.0% in consideration of economy. By the way, in this specification, humus refers to black-brown organic matter formed by the decomposition of animals and plants contained in soil, coal, and the like.Specifically, humus is the decomposition of plants and animals by microorganisms, carbon dioxide,
Water, inorganic gases such as ammonia, and low molecular organic substances such as sugars, quinones, amino acids, and proteins are formed, and these low molecular organic substances repeat the dehydration bond to become high molecular resynthesis products. And undecomposed organic matter, and naturally includes humus.

According to a second aspect of the present invention, the concentration of the sludge is maintained at 3,000 to 12,000 mg / l, and the amount of the odor gas introduced is reduced to ³ per m ^{3 of the} sludge amount.
It is desirable to set it to 0 m ³ / h (time) or less.

According to the deodorizing method of the present invention, if the concentration of the sludge is reduced to less than 3,000 mg / l, sufficient deodorizing action cannot be obtained due to lack of deodorizing ability. Alternatively, the sludge concentration is stabilized by supplying wastewater containing a large amount of organic matter. On the other hand, if the sludge concentration exceeds 12,000 mg / l, the sludge concentration becomes too high, the viscosity of the sludge becomes too high, and the efficiency of contact with the odorous gas decreases. The amount of odor gas introduced is 3
If it exceeds 0 m ³ / h, the activated sludge exceeds the inherent deodorizing ability, and a satisfactory deodorizing action cannot be expected.

According to a third aspect of the present invention, there is provided a deodorizing apparatus having a deodorizing tank for storing sludge, bringing an odor gas to be introduced into contact with the sludge, and deodorizing the sludge. The deodorizing tank is disposed at a lower part in the tank,
An air diffuser for bubbling the odor gas into the sludge, and a sludge layer stored so that the height from the air diffuser to the upper surface of the sludge is at least 600 mm; and Through a circulation pump from a water-permeable container such as a basket that is suspended in the bed and contains granulated (pellet-like) humus (including humus soil) and a sludge discharge pipe provided near the bottom of the deodorization tank A defoaming mechanism for feeding the activated sludge upward and injecting the sludge onto the upper surface of the sludge layer from a defoaming nozzle disposed above the upper surface of the sludge layer in the deodorization tank, and an exhaust port provided on the ceiling of the deodorization tank And an exhaust pipe provided with an activated carbon packed bed in the middle of the exhaust path.

According to the deodorizing apparatus according to the third aspect of the present invention, the sludge stored in the deodorizing tank comes into appropriate contact with the humus in the water-permeable container, and is matured and activated by the soil fungus group in the humus. Be transformed into At this time, the sludge is sufficiently stirred and activated by the air introduced from the diffuser. In this state, the odor gas is introduced into the sludge in the deodorization tank from the diffuser, and is stirred by the odor gas, whereby the sludge and the odor gas are sufficiently contacted. When the odor gas escapes from the upper surface of the sludge, a large amount of bubbles are generated, and these bubbles are eliminated by injecting sludge (sludge water) circulated by the defoaming mechanism from the defoaming nozzle. In particular, the height from the diffuser to the top of the sludge is set to 600 mm or more so that the odor gas can contact the sludge sufficiently and at least for the time required for deodorization, so that the odor components are reliably decomposed and removed. Is done. Then, the odor gas becomes almost odorless gas and is exhausted from the exhaust stack.However, due to the use of sludge, even if a slight amount of soil odor and sludge odor may remain, these odors can be removed by activated carbon. Since it is adsorbed, it can be exhausted to the outside without odor.

According to a fourth aspect of the present invention, a perforated plate having a large number of small holes is provided at an upper end portion in the deodorizing tank, and the water partially protrudes upward through a central portion of the perforated plate. Attach a sealed tube and provide a sludge or wastewater injection section above the perforated plate of the deodorization tank, while opening the upper end drain port of the drainage pipe of the sludge overflowing below the perforated plate upward from the sludge layer. It is preferable that piping is provided to the outside of the deodorization tank, and the defoaming nozzle is disposed downward between the upper part of the perforated plate and the lower part of the sludge upper surface.

According to the deodorizing device of the fourth aspect, the sludge (water) is projected upward on the perforated plate by the length of the water seal tube (2 in the embodiment).
(0 to 30 mm) to form a sludge water film.
The sludge water dropped and injected on the perforated plate flows into the lower sludge layer from the water seal tube. In this state, the odor gas that penetrates through the small holes of the perforated plate also passes through the sludge water film and is discharged from the exhaust pipe, so that the odor gas comes into active contact with the sludge on the perforated plate and is deodorized. Bubbles are generated and accumulated in the space between the perforated plate and the upper surface of the sludge layer and in the space above the sludge water film accumulated on the perforated plate, respectively, and these bubbles are ejected from the defoaming nozzle. Is extinguished by sludge water. In addition, the sludge drain pipe automatically maintains the upper surface height of the sludge in the deodorization tank at a predetermined height, thereby facilitating management.

The sludge drainage pipe is connected at the other end thereof to an intermediate position in the vertical direction of a sludge separation tank having an open upper end, and the sludge return pipe is connected to a vicinity of a bottom of the sludge separation tank. The other end of the pipe is connected to the upper end of the deodorization tank, and the upper end of the drainage pipe for discharging water overflowing near the upper end in the sludge separation tank is opened upward and piped. The upper end drainage port may be set at a position lower than the upper end drainage port of the sludge drainage pipe provided in the deodorization tank.

According to the fifth aspect of the present invention, when injecting sewage, sludge water or dew water generated in a garbage disposal machine or a garbage disposal plant into the deodorization tank, the sludge overflows with the water. However, the outflowing sludge is separated from the water in the sludge separation tank, collected, and returned to the deodorization tank, so that the sludge concentration is easily maintained at a predetermined concentration and the management becomes easy. Therefore, it is particularly suitable for simultaneously deodorizing garbage dew water generated in a garbage disposal machine or a garbage disposal plant.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a deodorizing apparatus according to the present invention will be described below with reference to the drawings.

FIG. 1 is an overall system diagram showing an embodiment of a deodorizing apparatus, FIG. 2 is a schematic sectional view showing an enlarged deodorizing tank of FIG. 1, and FIG. 3 is a partial sectional view showing an enlarged view of the vicinity of a perforated plate of FIG. FIG.

As shown in FIG. 1, a deodorizing device 1 includes a deodorizing tank 2.
And a sludge separation tank 3. Both tanks 2 and 3 are juxtaposed at a certain interval. The deodorizing tank 2 is formed of a cylindrical body having an exhaust port 4 at the center of the upper surface of a cylindrical or rectangular tube. An exhaust pipe (chimney) 5 is connected to the exhaust port 4 in an upward direction, and an activated carbon filled layer 6 is interposed in an intermediate portion of the exhaust pipe 5 in the vertical direction. An opening / closing door (not shown) is provided on the side surface of the exhaust pipe 5 so that the activated carbon of the packed bed 6 can be replaced.

As shown in FIG. 2, an air diffuser 7 is disposed slightly above the bottom in the deodorizing tank 2, and one end of an odor gas introducing pipe 8 is connected to a lower portion of the air diffuser 7. The diffuser 7 is an arcuate spherical surface 7
a and a number of small holes (not shown) on its outer peripheral surface 7b,
Odor gas is diffused into sludge in the form of fine bubbles. At a position (height) 600 mm or more upward from the top surface of the diffuser 7, the sludge water discharge pipe 9 is disposed with the funnel-shaped upper end opening 9 a facing upward, and the discharge pipe 9 is extended downward. After that, it is bent at a substantially right angle and is led out from the side wall 2a of the deodorization tank 2. In the diffuser 7,
An off-the-shelf product, for example, an ultra-fine bubble diffuser (trade name (trademark): Erastocks) of Misuzu Industrial Co., Ltd. can be used.

A perforated plate (a punching plate in this example) 10 having a large number of holes 10a having a diameter of about 15 mm is mounted above the upper end opening 9a of the discharge pipe 9. As shown in FIG. 3, a water sealing tube 11 is disposed at the center of the perforated plate 10 so that the upper end thereof projects upward and penetrates. In this example, the upwardly projecting length of the water sealing tube 11 is set to 20 to 30 mm, and the water film of the sludge on the perforated plate 10 has a thickness t = 20 to 3
It is configured to be formed to about 0 mm. The lower end of the water seal tube 11 extends slightly below the middle position in the vertical direction of the deodorization tank 2 as shown in FIG. 2, and is opened in the sludge.

As shown in FIG. 2, a gas-permeable container 1 for storing granular material obtained by molding humus into pellets in sludge in a deodorization tank 2.
2 are suspended. The container 12 is, for example, a basket-shaped container, and is provided with a deodorizing tank 2 so that humic particulates can be sequentially replenished.
An opening / closing door (not shown) is provided on the side wall 2a to allow the container 12 to be taken in and out, and the container 12 can be suspended and arranged inside the side wall 2a. The type of humus Z is not particularly limited, but the fallen leaves of deciduous trees and decomposed substances derived from animals are sufficiently decomposed in a warm climate,
It is then desirable to use humus, which is made from neutral corrosion formed by saturation with calcium after the resynthesis has been made, and which has been reduced in molecular weight by biotechnology and stabilized in the form of micelle colloid by increasing the amount. Neutral corrosion is corrosion that has been buried underground for 8,000 years.
This is because the amount of vegetative corrosion degraded by microorganisms is large, and thus the content of fulvic acid and its iron complex produced by biotechnology reaches several tens of percent.

The sludge discharge port 13 is provided at the bottom of the deodorization tank 2.
And one end of a sludge circulation pipe 15 provided with a circulation pump 14 is connected to the discharge port 13. The other end of the sludge circulation pipe 15 is branched into two and inserted into the deodorization tank 2, and each of the branch pipes 15a.
The defoaming nozzles 16 and 17 are connected to the end of 15b to form a defoaming mechanism 18. Then, one defoaming nozzle 16 is disposed below the perforated plate 10 toward the center, and the other defoaming nozzle 17 is disposed above the perforated plate 10 at the center.

Further, the other end of the sludge water discharge pipe 9 is connected to a position slightly above the vertical intermediate position of the sludge separation tank 3. An opening provided with a sludge discharge port 20 at the bottom of the sludge separation tank 3, one end of a sludge return pipe 21 connected to the discharge port 20, and the other end provided through the upper surface (wall) 2 c or the side wall 2 a of the deodorization tank 2. 22
/ 23 (FIG. 2). The upper end of the sludge separation tank 3 is left open, and the funnel-shaped upper end opening 24 a of the drain pipe 24 is opened.
Is disposed at a position slightly lower than the upper end open position with the upper side upward, the drain pipe 24 is extended downward, and then bent substantially at a right angle to be guided to the outside from the side wall 3a of the sludge separation tank 3 to be drained (not shown). And rivers.

The return of the sludge flowing through the sludge return pipe 21 is performed by an air lift pump function without using an electric pump. That is, as shown in FIG. 1, the odor gas introduction pipe 8 is branched to the diffuser 7, and one end of the branch pipe 8 a is connected to the middle of the return pipe 21 via the electromagnetic on-off valve 25. In the case of this example, since the odor gas introduces what is generated in the garbage disposal machine 41, the odor gas is connected to the collection blower 27 via a mist separator 26 via a pipe 28, and moisture such as dew water is supplied to the mist separator 26. To remove and send only gas (gas). Mist separator 26 of pipe 28
Downstream of the on-off valve 38 interposed in the pipe 28 on the downstream side of
One end of an air introducing pipe 29 provided with an on-off valve 30 is connected. Further, the drain 4 of the dew condensation water W of the garbage disposal machine 41 is provided.
The feed pump 3 is connected to the condensed water introduction pipe 31 having one end connected to 1a.
2 and the other end is connected slightly below the vertical middle position of the deodorization tank 2. Then, a pipe 33 connected to the lower end of the mist separator 26 is connected in the middle of the introduction pipe 31. Further, from the sewage / sludge treatment facility 40, the sewage / sludge X
Is connected to the upper surface of the stored sludge layer X in the deodorization tank 2 and the space 35 of the perforated plate 10. The feed pipe 34 is provided with a feed pump 36 and an on-off valve 37.

As described above, the deodorizing apparatus 1 according to the embodiment of the present invention is configured. The usage of this deodorizing device will be described below.

The sludge X is fed to the deodorization tank 2 through a sludge feed pipe 34, and a predetermined amount of the sludge X is stored.

The sludge X in the deodorization tank 2 is 0.5
At the same time, the humus Z of about 1.0% by weight is charged and activated, and at the same time, the diffuser 7 is introduced into the sludge layer X in the deodorization tank 2.
The initial adjustment by air agitation by introducing air A from
It is carried out for a day to activate and stabilize sludge X. At this time,
The on-off valve 30 is opened, and the on-off valve 38 is closed.

In the state described above, the pellet-shaped humus Z is housed in the basket-shaped container 12 and suspended in the sludge layer X in the deodorization tank 2.

The odor gas G generated from the garbage disposer 41 is diffused into the sludge X in the deodorization tank 2 by the diffuser 7.
From the air to form fine bubbles. At this time, aeration per hour of odorous gas G is adjusted within 30 m ³ in storage capacity 1 m ³ per sludge layer X in deodorizing tank 2. The on-off valve 30 is closed and the on-off valve 38 is opened.

In the garbage disposer 41, the temperature is usually 40 ° C.
Since the garbage is fermented and decomposed at a temperature of about 70 ° C., a large amount of dew water W is generated in the garbage processor 41. Condensation water W is also generated in the odor gas G ventilation path in the garbage disposal machine 41, and the dew condensation water W is separated in the mist separator 26 and condensed water W generated in the garbage disposal machine 41. At the same time, it is introduced into the sludge layer X in the deodorization tank 2 through the dew condensation water introduction pipe 31. Condensation water W generated from garbage
Has a bad odor and a BOD of 150 to 200 mg / l
Therefore, the deodorizing and sewage treatment is performed by contacting with the sludge X in the same manner as the odor gas G.

In order to stabilize the deodorizing effect and keep it effective, the sludge concentration of the sludge layer X is 3000 to 12000 m
g / l, so that the sludge concentration is 3000
When the concentration is reduced to mg / l or less, the sludge X is fed from the sewage / sludge treatment facility 40 to the deodorization tank 2 through the sludge feed pipe 34. In the deodorizing apparatus 1 of this example, since the overflowing muddy water Y is once guided to the sludge separation tank 3 and separated from the supernatant water U, and the sludge X is returned to the deodorizing tank 2, the sludge concentration is easily kept constant. The supernatant water U is drained to a drain or the like.

As shown in FIG. 3, a sludge water film M having a predetermined thickness is always formed on the perforated plate 10, and the odor gas G introduced into the deodorization tank 2 and diffused is mixed with the sludge X. After sufficient contact, it comes out of the hole 10a of the perforated plate 10,
At this time, it comes into contact with the sludge water film M and is deodorized again.
Such a structure in which the perforated plate 10 is provided to form the sludge water film M having a constant thickness may be provided when it is difficult to deodorize the odor gas G, that is, when a large amount of odor components is contained, and may be omitted. It is possible. Then, the deodorized odor gas G 'is exhausted from the exhaust pipe 5, and when passing through the activated carbon 6, sludge odor and the like are removed and exhausted.

Further, when the odor gas G diffused from the diffuser 7 escapes from the sludge layer X and the sludge water film M, a large amount of bubbles are generated. These bubbles are eliminated by the defoaming mechanism 18. . That is, the sludge X settling at the bottom of the deodorization tank 2 passes through the circulation pipe 14 and the circulation pump 15
The foam is stored in the upper surface of the sludge layer X and the foam stored in the upper surface of the sludge water film M on the perforated plate 10 is ejected and discharged from the defoaming nozzles 16 and 17. As a result, the bubbles disappear and the deodorized gas inside is discharged from the exhaust pipe 5 to the outside.

As described above, in the case of the present embodiment, the dew water W
Is also deodorized at the same time. Then, the odor gas G is deodorized and discharged into the atmosphere, and the dew water W is deodorized and discharged together with the supernatant water (supernatant) U in the sludge X. On the other hand, no chemical substance is used for the deodorization treatment, and naturally occurring humus and sludge are used, so that a large amount of odorous gas can be dripped at low cost. In addition, as for the deodorizing equipment, it is basically sufficient to provide the deodorizing tank 2, and this deodorizing tank 2 functions as a reactor for activating the sludge together with the deodorizing treatment, so that the equipment cost is low and the installation space is small. Small enough.

[0041]

As is apparent from the above description,
The deodorizing method and apparatus according to the present invention have the following excellent effects.

(1) Sludge (sewage) generated at a sewage treatment plant
And humus (soil) can be used to deodorize a large amount of odorous gas at a low cost, and has a high deodorizing effect and a long lasting effect.
In particular, in the deodorizing method of the present invention, while the soil bacteria group in the humus introduced in the sludge stored in the deodorization tank is cultured using sludge / sewage as a nutrient source, the sludge is aged by the propagation of the soil bacteria group. The bacteria in the soil fungus group that is activated and contained in the sludge produce metabolites, and the metabolites have a deodorizing component, that is, an odor removing component. In addition, a high content of aerobic and facultative anaerobic bacteria and high-quality humus are used for activating sludge, so that the sludge can be obtained relatively easily and inexpensively. Furthermore, the odorous gas introduced into the activated sludge stored in the deodorization tank is diffused and dispersed and efficiently comes into contact with it, and the odorous components in the gas and the metabolites produced by the bacteria of the soil bacteria group are present. It reacts with the deodorizing component and exerts a deodorizing effect.

(2) In the deodorizing method according to the second aspect, if the concentration of the sludge is reduced to less than 3,000 mg / l, sufficient deodorizing action cannot be obtained due to lack of deodorizing ability. Alternatively, since the sludge concentration is stabilized by supplying wastewater containing a large amount of organic substances, an excellent deodorizing effect is continuously maintained.

(3) In the deodorizing apparatus according to the third aspect of the present invention, the above-mentioned deodorizing method can be reliably carried out, and the sludge is sufficiently stirred and activated by the air introduced from the diffuser into the deodorizing tank. Is promoted, and odor gas is introduced into the sludge in the deodorization tank from the diffuser, stirred by the odor gas, and the sludge and the odor gas are sufficiently brought into contact with each other. The sludge is sufficiently in contact with the sludge when it comes out of the room, and the height from the diffuser to the top of the sludge is 600m.
m or more so that the odor gas is sufficiently in contact with the sludge and at least for the time required for deodorization,
Odor components are reliably decomposed and removed, and the odor gas can be exhausted to the outside from the exhaust pipe introduced as a nearly odorless gas in an odorless state.

(4) In the deodorizing device according to the fourth aspect, the odorous gas penetrating through the small holes of the perforated plate in a state in which the sludge (water) constantly accumulates to about 20 to 30 mm on the perforated plate to form a sludge water film. Is also discharged from the exhaust pipe through the sludge water film, so that it positively contacts sludge on the perforated plate and is deodorized, so that the deodorizing effect is very high. In addition, the sludge drain pipe automatically maintains the upper surface height of the sludge in the deodorization tank at a predetermined height, thereby facilitating management.

(5) In the deodorizing apparatus according to the fifth aspect, when injecting sewage, sludge water or dew water generated in a garbage disposal machine or a garbage disposal plant into the deodorization tank, the sludge overflows with water. Although the sludge flows out, it is separated from the water in the sludge separation tank, collected and returned to the deodorization tank, so that the sludge concentration is easily maintained at a predetermined concentration or more, and it is easy to manage. It is suitable for deodorizing water condensed water of garbage generated at the garbage disposal site at the same time.

[Brief description of the drawings]

FIG. 1 is an overall system diagram showing an embodiment of a deodorizing device of the present invention.

FIG. 2 is a schematic sectional view showing the deodorizing tank of FIG. 1 in an enlarged manner.

FIG. 3 is an enlarged partial cross-sectional view showing the vicinity of a perforated plate 10 of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Deodorizing device 2 Deodorizing tank 3 Sludge separation tank 5 Exhaust pipe 7 Diffusing diffuser 10 Perforated plate 11 Water seal tube 12 Water permeable container 16.17 Defoaming nozzle 18 Defoaming mechanism

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B01D 53/81

Claims (5)

[Claims] 1. Sludge is stored in a deodorization tank and air is introduced into the sludge in the deodorization tank in a state where humus of 0.5 to 1.0% by weight is added to the sludge to activate the sludge. After performing the initial adjustment by air stirring to activate and stabilize the sludge, the odor gas generated from the garbage disposer and the like is introduced into the sludge in the deodorization tank in the form of fine bubbles. And deodorizing by decomposing odorous gas by contacting with activated sludge. 2. The sludge concentration of 3,000 to 12,000.
2. The deodorizing method according to claim 1, wherein the amount of the odorous gas is set within a range of 30 m ³ / h per 1 m ^{3 of the} sludge while maintaining the concentration at 0 mg / l. 3. A deodorizing apparatus comprising a deodorizing tank for storing sludge and bringing odor gas to be introduced into contact with the sludge to deodorize the odor gas, wherein the deodorizing tank is disposed at a lower portion in the tank, and A diffuser for diffusing air into the sludge in the form of bubbles, a sludge layer stored so that the height from the diffuser to the upper surface of the sludge is at least 600 mm, and Activated sludge is fed upward through a circulating pump from a water-permeable container such as a basket that houses suspended granules of humus and a sludge discharge pipe provided near the bottom of the deodorization tank, and the sludge in the deodorization tank A defoaming mechanism for injecting sludge from the defoaming nozzle disposed above the upper surface of the bed to the sludge layer upper surface, and an activated carbon filling layer provided in the middle of the exhaust passage connected to the exhaust port provided on the ceiling of the deodorization tank Deodorizing equipment characterized by having an exhaust pipe . 4. A perforated plate having a large number of small holes is provided at an upper end portion in the deodorizing tank, and a water seal tube which penetrates a central portion of the perforated plate and partially protrudes upward is attached. While the sludge or wastewater injection section is provided above the perforated plate of the tank, the upper end drain port of the drainage pipe of the sludge overflowing below the perforated plate is opened upward so that the sludge layer is directed to the outside of the deodorization tank. 4. A pipe, wherein the defoaming nozzle is disposed downward between the upper part of the perforated plate and the lower part of the sludge upper surface.
The deodorizing device described. 5. The other end of the sludge drainage pipe is connected to the vicinity of a vertical intermediate position of a sludge separation tank having an open upper end, and the other end of the sludge return pipe connected to the vicinity of the bottom of the sludge separation tank is deodorized. Connected to the upper end of the tank, the upper end drainage of the drainage pipe for discharging water overflowing near the upper end in the sludge separation tank is opened upward and piped, and the upper end drainage of the drainage pipe, 5. The deodorizing apparatus according to claim 4, wherein the apparatus is set at a position lower than an upper end drainage port of the sludge drainage pipe provided in the deodorization tank.