JP2000042352A - Biological deodorizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device capable of efficient deodorization by passing a malodorous gas through a carrier bed carrying deodorizing microorganisms. SOLUTION: A malodorous gas is supplied into the carrier bed 11 provided in a deodorization tower 1 and carrying deodorizing microorganisms and passed upward through the bed 11. Meanwhile, a water sprnkling nozzle 4a is furnished above the bed 11 and a treated water tank 5 below the bed, a circulating pump 6 is provided between the treated water tank 5 and water sprinkling nozzle 4a, and the carrier bed 11 is activated and cleaned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a biological deodorizing apparatus for biologically deodorizing odors generated in human waste and sewage treatment plants.

[0002]

2. Description of the Related Art Offensive odor components generated in human waste and sewage treatment plants are mainly nitrogen compounds such as ammonia and trimethylamine, and sulfur compounds such as hydrogen sulfide and methyl mercaptan, which can be decomposed by microorganisms. . For this reason, a biological deodorizing apparatus that distributes and treats an odorous gas through a carrier filler on which microorganisms have formed has been used, and soil, peat, ceramics, activated carbon, and the like are mainly used as carriers on which microorganisms are formed. Used.

[0003]

In the above-mentioned prior art, carriers such as soil and peat are inexpensive, have a large specific surface area, and have a high deodorizing effect, but they are easily compacted, so that pressure loss is high and power costs are high. In addition, it may be blocked by long-term use. In addition, ceramics and activated carbon have a low initial pressure loss, but the pressure loss tends to increase with the growth of microorganisms and the incorporation of contaminants, which makes microorganism management complicated. Also, the cost of the carrier is high.

[0004]

SUMMARY OF THE INVENTION The present invention has solved the above-mentioned problems of the prior art, and the gist of the present invention is that a gas passage is sandwiched between left and right sides of a deodorization tower of a deodorization apparatus. And the upper and lower chambers are communicated with each other. A watering nozzle is provided above the carrier layer, and a watering nozzle is provided below the carrier layer. A supply port for the odorous gas is opened in one of the chambers, an outlet for the processing gas is provided in the upper chamber on the other side of the carrier layer, and further, a processing water tank is formed in each of the lower left and right chambers of the deodorization tower. A circulation pump is provided in a circuit between the treated water tank and the water spray nozzle.

[0005] As a carrier for the deodorizing microorganisms to be charged into the above-mentioned deodorizing tower, a sponge-like elastic porous body and a synthetic resin mesh-like nonwoven fabric are bonded together, or a sponge-like elastic porous body is made of a synthetic resin. What is sandwiched and adhered by a reticulated nonwoven fabric is cut into small pieces and used.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The malodorous gas supplied to the deodorization tower from the supply port of the malodorous gas passes through the carrier layer composed of the carrier in an upward flow, and the malodorous components are decomposed by microorganisms attached to the carrier. It is released to the atmosphere by a deodorizing fan as a processing gas. At the initial stage, the microorganisms adhere to the carrier and are multiplied by the microorganisms and nutrients in the human waste and sewage treated water sprinkled from the watering nozzle. Watering at the time of the regular treatment is performed not only to keep the water necessary for the inhabitation of the microorganisms, but also to dissolve the malodorous components, and to wash out the decomposition products and the surplus microorganisms.

[0007] Since the sponge-like elastic porous body constituting the carrier layer is porous, it is suitable for the formation of microorganisms that decompose malodorous components.
Like the sponge-like elastic porous body, the voids serve as a bed for microorganisms.The characteristics of this mesh-like nonwoven fabric are that it has water permeability, is stronger in compressive force than the aforementioned elastic porous body, and forms a carrier layer. However, the present invention is to prevent the elastic porous body from being crushed by gravity when containing water. When the carrier layer is formed, the elastic porous body and the mesh-like nonwoven fabric that are bonded together can form a carrier layer that takes advantage of the characteristics of the carrier layer.

[0008]

1 is a system diagram of the present invention, and FIGS. 2 and 3 show a part of a carrier. In FIG. 1, reference numeral 1 denotes a deodorization tower, which is connected to an odor gas supply port 2 and a processing gas outlet 3 at the lower part of each of the left and right sides and a sprinkling pipe 4 at the upper part, and further provided a processing water tank 5 at a lower part. A circulating water extraction pipe 7, a supply pipe 8, a makeup water supply pipe 9, and a drain pipe 10 are connected to the treated water tank 5 via a circulation pump 6.

In the deodorization tower 1, a sponge-like elastic porous body and a mesh-like nonwoven fabric made of a synthetic resin are stuck together, or a sponge-like elastic porous body is synthesized. The carrier layer 11 is filled with a carrier 11a sandwiched and bonded by a resin mesh nonwoven fabric, and a sprinkling nozzle 4a is provided on an upper portion thereof.

The operation of treating the malodorous gas with the biological deodorizing device having the above-mentioned configuration will be described below. The malodorous gas generated in the night soil treatment plant and the sewage treatment plant is supplied to the deodorization tower 1 from the intake port 2. The supplied malodorous gas rises between the carrier layers 11 filled with the carrier 11a and is deodorized, is sucked from the outlet 3 by the deodorizing fan 13, and is released into the atmosphere.

The water spray on the carrier layer 11, which is a microorganism carrier,
The water is sprayed intermittently or continuously uniformly from the watering nozzle 4a via the watering pipe 4 by the circulation pump 6. By this watering, nutrients necessary for the growth of the microorganisms are maintained and the moist state is maintained, the growth of the microorganisms is promoted, sulfuric acid as a decomposition product and surplus microorganisms are washed away, and the optimum pH condition can be maintained.

The malodorous components generated in human waste and sewage treatment plants are mainly sulfur compounds such as hydrogen sulfide and methyl mercaptan, and nitrogen compounds such as ammonia and trimethylamine, and are decomposed into sulfuric acid and nitrogen gas by the treatment. Due to the generation of the sulfuric acid and the like, the carrier layer 11 has a pH suitable for the inhabitation of microorganisms.

[0013] The formation of microorganisms on the carrier layer 11 in the early stage of operation is promoted by spraying biologically treated water such as night soil or sewage treatment plants. However, the filler is immersed in an activated sludge aeration tank in advance. By using this, the stable carrier layer 11 can be obtained even earlier.

[0014]

As described above, according to the present invention, the deodorizing operation can be continuously performed by circulating the odor gas in the carrier of the microorganism for deodorizing provided in the deodorizing tower. Then, since the odor gas is exchanged in the carrier with the treated water that also serves as activation and cleaning of the microorganisms, efficient deodorization can be performed, and the carrier itself is a bonded body of sponge and mesh-like non-woven fabric, so that a large gap is provided. It has a contact area, compensates for the low compressive strength of the sponge and the airflow resistance with a nonwoven fabric, and can easily be cleaned and can operate continuously and efficiently.

[Brief description of the drawings]

FIG. 1 is an operation system diagram of a deodorizing device according to the present invention.

FIG. 2 is also a perspective view of one piece of the carrier for the deodorizing microorganism.

FIG. 3 is a perspective view of another embodiment of the carrier.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Deodorization tower 1a Gas passage 2 Supply port 3 Outlet 4a Sprinkling nozzle 5 Treatment water tank 6 Circulation pump 11 Carrier layer 11a Carrier A Elastic porous body B Mesh-like nonwoven fabric

Claims (3)

[Claims] 1. A deodorization tower 1 is divided into two chambers, left and right, with a gas passage 1a interposed therebetween. The two chambers are vertically divided by a deodorizing carrier layer 11, and upper and lower chambers thereof are provided. Are connected to each other, and the watering nozzle 4 is provided above the carrier layer 11.
a, a supply port 2 for the malodorous gas is opened in one of the lower chambers of the carrier layer 11, and a processing gas outlet 3 is provided in the other chamber above the carrier layer 11. A treatment water tank 5 is formed at the lower bottom of each of the two chambers, and a circulation pump 6 is provided in a circuit between the treatment water tank 5 and the water spray nozzle 4a.
The biological deodorization device provided with. 2. A sponge-like elastic porous body A and a synthetic resin mesh nonwoven fabric B are laminated as a carrier 11a of microorganisms forming the carrier layer 11, and the laminated body is cut into small pieces. 2. The biological deodorizing device according to claim 1, wherein said device is charged. 3. As the carrier 11a of the microorganisms forming the carrier layer 11, a sponge-like elastic porous body A sandwiched between synthetic resin mesh-like nonwoven fabrics B and attached thereto is loaded. Item 2. The biological deodorizing device according to Item 1.