JPH11165027A - Microorganism deodorizing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently treat complex odor containing ammonia and other odor components with microorganism deodorization. SOLUTION: This device is provided with plural deodorizing tanks 1, 11 provided with water spraying devices 9, 19 for spraying water to carriers 3, 13 and connecting them in series and besides a water transfer means 5 for recovering sprayed water and feeding water to the water spraying device in the deodorizing tank 11 in the post stage. Then, the complex odor components are efficiently treated to decompose with the different deodorizing tanks 1, 11 and besides the door component dissolved into the sprayed water can be surely treated without stagnating.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microorganism deodorizing apparatus capable of efficiently treating a complex odor generated in an organic waste composting plant, a sewage treatment plant, a livestock barn or the like.

[0002]

2. Description of the Related Art Conventionally, a method using microorganisms has been known as a method for deodorizing odors generated in composting plants for organic waste, sewage treatment plants, livestock pens, and the like. In this method, microorganisms are carried on a carrier, the carrier is housed in a deodorizing tank, odor is sent into the deodorizing tank, and odor components are decomposed and deodorized by the activity of the microorganisms. FIG. 3 shows an example of this deodorizing apparatus. A carrier 26 carrying microorganisms is accommodated in a deodorizing tank 25 provided with an odor introducing pipe 25a and an exhaust pipe 25b. At the bottom is provided a water receiver 27 for receiving water sprinkled on the carrier 26 and passed through the carrier 26. The water receiving portion 27 is connected to a water storage tank 28 installed outside the deodorization tank 25, and water in the water storage tank 28 is sprinkled on the carrier 26 by a water sprinkling device 29. As described above, a part of the water is passed through the carrier 26 and the water
And then circulates by flowing back to the water storage tank 28.

In operation of the above apparatus, activated sludge or the like (not shown) is mixed in a carrier 26, and odor is introduced into the deodorization tank 25 from an odor introduction pipe 25a. , And water is sprayed toward the carrier 26 and the activated sludge. Then, the microorganisms contained in the activated sludge gradually grow by being provided with appropriate moisture and a substrate, are gradually fixed to the carrier, and decompose the odor. Also, due to the water spray, some microorganisms move together with water, and a part of odor components and decomposition products generated by the activity of microorganisms are dissolved in the water and carried away. Since this water is once stored in the water storage tank 28, a decomposition reaction of microorganisms using these components as a substrate occurs in the water storage tank 28, and the deodorizing performance is enhanced.

[0004]

By the way, the odor generated by the above-mentioned equipment contains a plurality of odor components such as ammonia gas.
The presence and activity of multiple types of microorganisms corresponding to each odor component are required. However, for multiple microorganisms, the optimal activity environment differs, and depending on the microorganism, the activity may be inhibited by incompatible odor components,
It is difficult to effectively deodorize a complex odor in which a plurality of odor components are completely integrated with a conventional microbial deodorizer. Therefore, a method of avoiding the above problem by treating the complex odor in a different tank for each component is conceivable, but adoption of this method causes other problems. That is,
Since the water-soluble odor component is easily dissolved in the sprinkled water, and this water is collected and repeatedly sprinkled, if the treatment is performed in different tanks for each odor component as described above, Unresolved odor components are contained in the water for sprinkling forever without being decomposed, and the concentration thereof is gradually increased by continuing the deodorizing treatment. This water is allowed to flow to the outside as drain water as necessary due to an increase in capacity or the like. Therefore, the use of the above method has a problem that untreated odor components flow out together with the drain water at a high concentration. The present invention has been made in view of the above circumstances, and enables microorganisms that can be treated in different deodorizing tanks for each odor component and that can reliably treat odor components dissolved in recovered water. It is intended to provide a deodorizing device.

[0005]

Means for Solving the Problems In order to solve the above-mentioned problems, a first invention of the microorganism deodorizing apparatus of the present invention contains a microorganism and a carrier carrying the microorganism, and takes in the odor into the inside to store the microorganism. After having been deodorized by microorganisms, it has a plurality of deodorization tanks for exhausting to the outside, and the deodorization tank has a watering device for sprinkling water on the carrier. It is connected in series so as to be taken into the deodorization tank, and further, a part or all of the water that has passed through the carrier storage layer at the time of watering is supplied to a part of the deodorization tank to the watering equipment of the subsequent deodorization tank. A water supply means is provided.

In a second aspect of the present invention, there is provided the microorganism deodorizing apparatus according to the first aspect, wherein the water spraying device is provided with a water storage tank for storing water for watering, and the water storage tank is provided with a water supply means in the preceding deodorizing tank. Is connected to the water discharge side. In the microorganism deodorizing device of the third invention, in the first or second invention, the water sprinkling device is provided with a water storage tank for storing the water recovered in the deodorizing tank and supplying the water again. The water inlet of the deodorizing tank is connected to the water inlet.

[0007] The present invention aims at deodorizing a complex odor containing a plurality of odor components.
The generation source is not particularly limited. For example, odor components include ammonia, hydrogen sulfide, phenol and the like, and generation sources include a composting plant, a sewage treatment plant, a livestock barn, a foundry, and the like. Further, as the microorganisms having a deodorizing effect, those appropriately selected according to the odor component to be treated can be used. For example, nitrifying bacteria are used for decomposing ammonia gas, and other odor components such as sulfur oxidizing bacteria for hydrogen sulfide and phenol assimilating bacteria for phenol are used. Since these microorganisms are fixed in each tank according to the above selection, the type of microorganism fixed by the tank may be different. In addition, inorganic and organic materials such as zeolite, charcoal, slag, ceramics, activated carbon, and PVA gel can be used as the carrier for supporting the microorganism. The type of these carriers may be changed for each deodorizing tank. In this case, the type of the carrier can be selected according to the type of the deodorizing gas in consideration of the fact that the gas to be deodorized is easily adsorbed.

Further, as a deodorizing tank for accommodating the above-mentioned carrier, in a large-scale apparatus, a hole can be dug in the ground, and this hole can be used as a deodorizing tank. An appropriate container can also be used as a deodorizing tank. it can. The deodorization tank is provided with an introduction section for introducing odor and an exhaust section for exhausting the deodorized gas. In this deodorization tank, two or more stages are connected in series such that exhaust gas from the preceding deodorizing tank is sent to the introduction part of the latter deodorizing tank. However, in the first-stage deodorization tank, the odor introduction section is connected to the source of odor, and in the last-stage deodorization tank, the exhaust section is directly opened to the atmosphere or provided with appropriate exhaust equipment. Be linked. The number of the deodorizing tanks is not limited as long as the number is two or more. The odor component to be treated in which deodorization tank can be selected as appropriate. However, in the first tank, the odor substance having the highest concentration in the odor or other microorganisms is not affected by the effect of inhibiting the activity. It is desirable to treat large odorants first.

[0009] The immobilization of microorganisms on the carrier is conventionally carried out by mixing activated sludge with the carrier, and this method can be employed in the present invention, but it is particularly limited to this method. Not something, for example,
Pre-cultured bacteria may be added. In particular, when fixing nitrifying bacteria in a deodorizing tank for decomposing ammonia, it is effective to use nitrifying bacteria which are preferentially cultured while suppressing the growth of other bacteria. The preferential culture can be performed by defining an appropriate medium, environment and the like and culturing. As a result, it is desirable that the number of nitrifying bacteria is 90% or more of the total number including other bacteria. In addition, the concentration of nitrifying bacteria was 10 ⁶ cells / m 2 in a state where the nitrifying bacteria were added to the tank water together with the medium before operation.
It is desirable that at least l be present. In addition, the nitrifying bacteria,
It can be sprayed on the carrier by being put into a water storage tank together with the liquid medium and sprayed with water. By spraying with watering in this manner, microorganisms can be uniformly added to the carrier.

[0010] Each deodorizing tank is provided with a sprinkler to supply necessary water to the microorganisms. The configuration of the watering device and the watering method are not particularly limited as the present invention, and it is essential that the watering can be sprayed on the carrier. As a result of water sprinkling, water that has passed through the carrier storage layer can be collected and further used for water sprinkling. In some deodorizing tanks, a part or all of the collected water is sprinkled in a deodorizing tank at a later stage by a water supply means. Water. Whether to supply the recovered water in the latter stage can be determined based on whether or not the odor components not treated in the deodorizing tank are dissolved in the recovered water in a large amount. Therefore, in all the deodorizing tanks, it is not required to supply the recovered water to the latter stage, and the water may be supplied to a later stage in some of the deodorizing tanks. The water supply means may be a means for forcibly supplying water using a pump or the like, or may be a means for supplying water using the inclination of a water channel, and the configuration thereof is not particularly limited.

The water supply by the water supply means may be such that the recovered water is directly supplied to a water sprinkler in a subsequent stage. Alternatively, once the water is stored in a water storage tank of the water sprinkler in the deodorizing tank, the water is appropriately supplied to the latter stage. The water may be supplied to the water spray device of the deodorization tank. In the water sprinkling device of the deodorization tank in the latter stage, the supplied water may be sprinkled immediately, or may be temporarily stored in a water storage tank and then sprinkled as appropriate. In addition, when supplying the collected water once stored in the water tank of the deodorization tank to the sprinkler of the subsequent stage, water may be supplied continuously, but depending on the operating condition of the deodorization tank, the water may be appropriately supplied to the subsequent stage. It may supply water. For example, water can be supplied when the amount of water stored in the water storage tank in the preceding stage exceeds a specified value. Further, as the concentration of the odor component to be treated in the downstream deodorization tank increases in the upstream water tank, the water in the water storage tank is supplied to the sprinkling device of the downstream deodorization tank by water supply means as necessary. Is also good. Examples of the requirement include a case where the elapsed time from the start of the deodorization in the preceding deodorization tank exceeds a prescribed time or a case where the concentration of the odor component in the preceding water storage tank exceeds a prescribed value.

That is, according to the present invention, since the treatment can be performed in different deodorizing tanks for each odor component, each microorganism can be activated in each deodorizing tank in a favorable environment, and the complex odor can be efficiently removed. Can be processed. In addition, even when the odor components to be treated in the latter stage are contained in the recovered water at a high concentration, this water is supplied to the later-stage sprinkling facility, and as a result of the sprinkling, the water is treated in the later-stage deodorizing tank. Odor components dissolved in water without being treated are also reliably decomposed in the subsequent stage.

[0013]

(Embodiment 1) Next, an embodiment of the present invention will be described with reference to the accompanying drawings. This deodorizing device has a two-stage deodorizing tank, and the first-stage deodorizing tank 1
It has a box shape, has a water-permeable shelf 1a at the bottom thereof, and is provided with an odor introduction unit 2 at the ceiling,
The odor introduction section 2 is connected to an odor source and a blower (not shown). In the deodorizing tank 1, the shelf 1
A support 3 made of zeolite particles is accommodated so as to be supported by a. Further, below the shelf 1a of the deodorization tank 1,
A water receiving portion 1b is secured, and an exhaust portion 4 connected to the next-stage odor introducing portion 12 is provided on a side portion,
One end (water inlet side) of a water supply pipe 5 is connected to the water receiving portion 1b as water supply means, and the other end (water discharge side) of the water supply pipe 5 is connected to a water storage tank 16 (described later) at a later stage. Have been. Further, the deodorizing tank 1 is provided with a water storage tank 6 for storing tap water and supplying it to the water sprinkler. The water storage tank 6 is connected to a water sprinkling pipe 8 provided with a pump 7 therebetween. Numeral 8 is connected to a water sprinkling section 9 arranged above the carrier 3. The water storage tank 7, the water sprinkling pipe 8 and the water sprinkling section 9 constitute a water sprinkling device of the deodorizing device 1.

The second-stage deodorizing tank 11 has substantially the same structure as that described above. The odor introducing unit 12 and the exhaust unit 14 and the shelf 11a connected to an exhaust system (not shown) are provided.
And a water receiving portion 11b, and a shelf 11a
A carrier 13 made of zeolite particles is stored on the top. Further, a drain pipe 15 is connected to the water receiving portion 11b, and the drain pipe 15 is disposed so as to discharge water to the outside. The deodorizing tank 11 is also provided with a water storage tank 16 for sprinkling water, and the water supply pipe 5 is connected to the water storage tank 16. The water storage tank 16 is connected to a water sprinkling pipe 18 provided with a pump 17 in the same manner as in the previous stage, and the water sprinkling pipe 18 is connected to a water sprinkling section 19 arranged on the carrier 13. In the second-stage deodorization tank 11 as well, a water spray device is constituted by the water storage tank 16, the pump 17, the water spray pipe 18, and the water spray unit 19.

Next, the operation of the deodorizing device will be described by taking as an example a case of treating a complex odor containing ammonia as a main component and containing phenol and the like. The nitrifying bacteria are preferentially cultured in a liquid medium in advance, and the nitrifying bacteria are added to the water storage tank 6 together with the medium. In the deodorization tank of the second tank, bacteria for treating odor substances other than ammonia, for example, when treating a complex odor comprising ammonia and phenol, phenol-utilizing bacteria are pre-cultured and put in the tank 16. deep. Then, the composite odor is supplied into the deodorization tank 1 through the odor introduction unit 2 and the pump 7
Is operated to pump the water in the water storage tank 6 together with the nitrifying bacteria, and to sprinkle the water from the sprinkling section 9 to the carrier 3 through the sprinkling pipe 8. As a result, the nitrifying bacteria are fixed to the carrier 3 and the deodorizing tank 1
Ammonia with a complex odor introduced into the cell is decomposed by the nitrifying bacteria. The odor gas from which ammonia has been treated
After passing between the carriers 3, it is sent from the exhaust part 4 to the deodorization tank 11 of the next stage through the odor introduction part 12. In addition, the above watering
A suitable amount of water is given to the nitrifying bacteria to maintain the activity of the microorganisms, and a part of the water passes between the carriers 3 and moves from the shelf 1a to the water receiving portion 1b. Water is supplied to In this water, phenol, which is an odor component, is dissolved, and these odor components are carried as they are in the second stage.

In the deodorizing tank 11, a pump 17 is operated,
The phenol-utilizing bacteria in the tank are fixed on the carrier 13.
Thereafter, with the introduction of the odor, the added microorganisms gradually grow, and odor components other than ammonia in the odor, such as phenols, are decomposed by phenol-utilizing bacteria. The gas from which the odor component has been removed as described above is discharged from the exhaust unit 14, and the water from which the odor component has been removed is discharged from the drain pipe 15 to the outside.

(Embodiment 2) In this embodiment, the water collected in the deodorization tank is not supplied to the next-stage deodorization tank as it is, but is temporarily stored in a water storage tank. The configuration is different from the embodiment in the following points. In addition, in the other configurations, the same components as those of the above embodiment are denoted by the same reference numerals, and the description thereof will be omitted or simplified. That is, in this embodiment, the water receiving portion 1b,
Return pipes 1c and 11c are respectively connected to 11b, and the return pipes 1c and 11c are respectively connected to water storage tanks 6 and 1c.
6 is connected. In addition, a bypass pipe 20 as a water supply means is connected between the water storage tanks 6 and 16,
A valve 21 is provided in the middle of the bypass pipe 20. In this embodiment, deodorization is performed in the same manner as in the above embodiment, but water that has passed through the carrier is temporarily stored in the water storage tanks 6 and 16. Then, in the first-stage deodorization tank, the valve 21 is periodically opened to supply the water in the water storage tank 6 to the water storage tank 16 through the bypass pipe 20. Also in this embodiment, the compound odor is efficiently deodorized, and the odor component dissolved in the water in the first deodorization tank 1 is surely decomposed in the deodorization tank 11 in the subsequent stage. In the above embodiment, the second-stage water storage tank 16 is described as storing only the water supplied by the water supply means. However, in addition to the water supply, water such as tap water is separately supplied. May be performed.

[0018]

As described above, according to the deodorizing apparatus of the present invention, a microorganism and a carrier carrying the microorganism are housed, an odor is introduced into the inside, the microorganism is deodorized, and then the exhaust gas is exhausted to the outside. A plurality of deodorizing tanks are provided, and the deodorizing tank is provided with a water sprinkler for sprinkling water on the carrier, and the deodorizing tanks are connected in series so that exhaust gas from the preceding deodorizing tank is taken into the subsequent deodorizing tank. Since a part of the deodorization tank was provided with a water supply means for collecting a part or all of the water that passed through the carrier storage layer at the time of water sprinkling and supplying the water to the water sprinkling device of the subsequent deodorization tank,
The complex odor can be efficiently treated, and the odor component dissolved in the collected water can be surely treated.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a deodorizing device according to an embodiment of the present invention.

FIG. 2 is a schematic view showing a deodorizing apparatus according to another embodiment.

FIG. 3 is a schematic view showing a conventional deodorizing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Deodorizing tank 1a Shelf part 1b Water recovery part 1c Return pipe 2 Odor introduction part 3 Carrier 4 Exhaust part 5 Water pipe 6 Water storage tank 7 Pump 8 Water sprinkling pipe 9 Water sprinkling part 11 Deodorizing tank 11a Shelf 11b Water collecting part 11c Return pipe 12 Odor introduction unit 13 Carrier 14 Exhaust unit 15 Drain pipe 16 Water storage tank 17 Pump 18 Sprinkler pipe 19 Sprinkler section 20 Bypass pipe 21 Valve

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kenji Fukushima 1-6-1, Funakoshi Minami, Aki-ku, Hiroshima-shi, Hiroshima Japan Steel Works Co., Ltd.

Claims (3)

[Claims] Claims 1. A microorganism containing a microorganism and a carrier carrying the microorganism, and after introducing odor into the inside and deodorizing with the microorganism,
It has a plurality of deodorizing tanks that exhaust to the outside, and the deodorizing tanks
While having a watering device for watering the carrier, the deodorization tanks are connected in series so as to introduce the exhaust of the former deodorizing tank to the latter deodorizing tank, and further, in a part of the deodorizing tank, A microbial deodorizer comprising a water supply means for collecting a part or all of water passed through a carrier storage layer at the time of water sprinkling and supplying the water to a water sprinkler of a deodorization tank at a later stage. 2. The water sprinkling device is provided with a water storage tank for storing water for water sprinkling, and the water discharge side of the water supply means in the preceding deodorization tank is connected to the water storage tank. The microorganism deodorizing device according to claim 1. 3. The water sprinkling device is provided with a water storage tank for storing water collected in the deodorizing tank and supplying the water again for water sprinkling, and an inlet side of a water supply means in the deodorizing tank is connected to the water storing tank. 3. The method according to claim 1, wherein
Microorganism deodorizing device described in