JPH09267022A - Deodorizing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively prevent a compacting phenomenon, to hold air-passing resistance to a minimum and to effectively and inexpensively deodorize malodorous gas by stacking honeycomb beds consisting of plural honeycomb structural bodies up and down and filling a space of each honeycomb structural body with a water containing deodorant. SOLUTION: Honeycomb beds 18 each consisting of plural honeycomb structural bodies 16 are stacked in a multistage manner in the up-and-down direction in a treating chamber 13. A space of each honeycomb structural body 16 is filled with a water containing deodorant for malodorous gas. The water containing deodorant is constituted of a microorganism carrier which is porous and has capacity of collecting malodorous gas and of miscellaneous bacteria such as livestock dung and sludge. From below the treating chamber 13 of a deodorizing device 12, malodorous gas generated in a malodorous gas generation source 1 is jetted through jetting holes of a jetting pipe 14 after it gets rid of dust and is cooled. In this way, since a load applied to below the water containing deodorant is parted, a compacting phenomenon is removed to secure a high void. and the environment of microorganisms, water and air is most suitably maintained to perform deodorization.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a livestock house, a urine treatment plant,
The present invention relates to a deodorizing method for deodorizing a malodorous gas mainly containing ammonia, mercaptan, hydrogen sulfide, etc., generated from various facilities such as a sewage treatment plant with microorganisms.

[0002]

2. Description of the Related Art Conventionally, various deodorizing methods have been developed as deodorizing methods for deodorizing such malodorous gases. For example, Japanese Examined Patent Publication (Kokoku) No. 3-60526 discloses that a ventilation medium for malodorous gas has a high porosity granular material formed by short fibers of a hydrophilic inorganic material such as rock wool, livestock dung, manure, or excess sludge. Disclosed is a technique relating to a method for treating malodorous gas, which is composed of a mixture of 50 to 70% by weight of water, which is mixed with a microbial active substance consisting of a single substance or a mixture of two or more substances such as

In this treatment method, the deposition layer composed of a mixture of aeration media has a highly permeable structure, and the deposition height is increased to improve the deodorizing efficiency of the malodorous gas.

[0004]

However, in this treatment method, since the mixture of the aeration medium contains a large amount of water, when the deposition layer becomes high, a compaction phenomenon occurs in the deposition layer and the void formation of the mixture is reduced. As a result, the ventilation resistance increases, the activity of deodorizing microorganisms decreases, and the deodorizing efficiency is impaired.

The present invention was created based on such a point of view. It effectively prevents the above-mentioned consolidation phenomenon, minimizes ventilation resistance, and optimally maintains the environment of microorganisms, water and air. The object of the present invention is to provide a deodorizing method for malodorous gas, which has excellent deodorizing efficiency, is inexpensive, and is easy to maintain and manage.

[0006]

In order to achieve the above object, the first invention of the present invention is a deodorizing method for introducing a malodorous gas to a deodorizing material in a processing chamber to deodorize it, and a deodorizing agent is blown through a ventilation duct by a blower. The malodorous gas introduced into the lower end of the treatment chamber and spouted from the spout hole is filled with a water-containing deodorant composed of a microbial carrier and inoculum in the space above the grit in the treatment chamber that has a sprinkler at the top. It is characterized in that the odorous gas is deodorized by introducing the honeycomb layer composed of the honeycomb structure of (1) to the lower surface of the lowermost honeycomb layer laminated in the vertical direction.

A second aspect of the present invention is a deodorizing method in which a malodorous gas is introduced into a deodorizing material in a processing chamber to deodorize the malodorous gas, which is introduced into a lower end portion of the processing chamber through a ventilation duct by a blower and spouted from a spouting hole. Gas is on the grit in the treatment chamber having a sprinkler on the top, is composed of a plurality of honeycomb structure filled with a microbial carrier of the hydrous deodorant in the space, and a honeycomb layer in which the inoculum is placed between the layers Is introduced to the lower surface of the lowermost honeycomb layer laminated in the vertical direction to deodorize malodorous gas.

A third invention is characterized in that the microbial carrier of the hydrous deodorant is porous rockwool granules, and the fourth invention is that the microbial carrier of the hydrous deodorant is porous rockwool. It is characterized by being a molded product.

[0009]

According to the present invention, the honeycomb layers composed of a plurality of honeycomb structures are vertically stacked, and the water-containing deodorant is filled in the space of each honeycomb structure. Therefore, the load applied downward is divided, the compaction phenomenon does not occur in the hydrous deodorant material of each honeycomb structure, high voids of the hydrous deodorant material can be maintained, and the ventilation resistance of the malodorous gas is minimized. Since a small blower can be used even if the height of the hydrous deodorant increases, the running cost can be reduced. In addition, the environment of microorganisms, water and air can be optimally maintained, the activity of microorganisms can be maintained, and efficient deodorizing work can be performed for a long period of time.

[0010]

Embodiments of the present invention will be described below. The honeycomb structure forming the honeycomb layer of the present invention can be used as long as it has corrosion resistance and load resistance, and a fluororesin or a stainless steel plate can be used, but preferably a ceramic material having air permeability. Is preferred. The honeycomb layers composed of the plurality of honeycomb structures are vertically stacked.

The water-containing deodorizing material filled in the space of the honeycomb structure is composed of a microbial carrier which is porous and has the ability to collect offensive odor gas, and inoculum such as livestock manure, manure and sludge. To be done. The microbial carrier is preferably a porous rockwool granule, preferably a granule having a diameter of about 2 to 10 mm, and a rockwool molded product obtained by molding the porous rockwool granule may be used. It is also possible to use, for example, sludge as the inoculum and place it between the layers of the honeycomb layer without mixing it with the microorganism carrier, or separately. The water-containing deodorizing material having such a structure contains 50 to 70% of water and deodorizes through a predetermined malodorous gas.

Next, an embodiment of the present invention will be described with reference to the drawings. In the figure, the malodorous gas containing ammonia, mercaptan, hydrogen sulfide, etc., generated from the malodorous gas source 1 passes through the first ventilation duct 2 to remove the dust / cooler 3
The odorous gas sent to the dust removing / cooling machine 3 is sent to the second ventilation damper provided with a control system 8 including a ventilation damper 4, a main blower 5, an auxiliary blower 6 and a temperature sensor 7. Sent to 9.

The tip of the second ventilation damper 9 is guided to the lower end of the processing chamber 13 in which the deodorizing device 12 is installed. In the processing chamber 13, the malodorous gas is branched into the tip of the second ventilation damper 9 and a plurality of ejection pipes 1 are provided.
4 is ejected from the ejection holes 15 (see FIG. 4). As shown in FIG. 4, the ejection pipe 14 is arranged so that the malodorous gas is evenly dispersed throughout the processing chamber 13. Further, the diameter of the ejection pipe 14 and the number of ejection holes 15 may be changed in each region of the processing chamber 13 so that the malodorous gas is uniformly dispersed and ejected into the processing chamber 13.

The processing chamber 13 is made of a material having excellent heat insulation and durability, for example, FRP. Inside the processing chamber 13, honeycomb layers 18 made up of a plurality of honeycomb structures 16 are vertically stacked. Are stacked on. The honeycomb structure 16 can be used as long as it has corrosion resistance and load resistance as described above, and fluororesin, stainless steel plate, or the like can be used, but preferably a ceramic material having air permeability is used. preferable. The honeycomb layer 18 is
This is an arbitrary matter such that a plurality of honeycomb structures 16 having a single structure are combined and configured, or that a plurality of honeycomb structures 16 are combined in advance and integrally configured. In addition, a plurality of small holes 19 are regularly or irregularly formed on the wall surface of the honeycomb structure 16 so that excessive water due to sprinkling, which will be described later, is drained from the small holes 19. And, each space 17 of the honeycomb structure 16 is filled with a water-containing deodorizing material 20 for malodorous gas.

As described above, the water-containing deodorant material 20 is composed of a microbial carrier which is porous and has the ability to collect malodorous gas, and inoculum such as livestock manure, manure and sludge. It is preferable to use a rock wool granulated product obtained by granulating porous rock wool into a granule having a diameter of about 2 to 10 mm or a rock wool molded product obtained by mixing porous rock wool into a plate shape. It is also possible to use the sludge as a seed, for example, using sludge and separately placing it without mixing it with the microorganism carrier, that is, placing it between the layers of the honeycomb layer 18.

In the illustrated example, the honeycomb layers 18 are laminated in four stages, but the number of laminated stages is not particularly limited, and it is desirable that the honeycomb layers be laminated in at least two stages. The lowermost honeycomb layer 18 is supported in the processing chamber 13 by a corrosion-resistant FRP grit 21. The FRP grit 21 is formed in a lattice shape as shown in FIG.
In 3 inside, it rises through the voids of the water-containing deodorizing material 20 of each honeycomb layer 18. Further, between the upper and lower honeycomb layers 18,
In order to prevent the water-containing deodorant or the microorganism carrier from coming off, a mesh plate 28 such as hard plastic or stainless steel plate is interposed.

A sprinkler 23 is provided on the upper surface of the uppermost honeycomb layer 18 in the upper part of the processing chamber 13. The water sprinkling device 23 is configured by branching a water sprinkling pipe 24 introduced from the outside of the processing chamber 13 so as to disperse the water sprinkling pipe 24 in the entire processing chamber 13 substantially uniformly.
It is configured such that an appropriate amount of water is sprayed from a plurality of water spray holes 25 provided in No. 4 toward the hydrous deodorant material 20 of the lower honeycomb layer 18. Reference numeral 26 indicates a humidity sensor, and 27 indicates an exhaust port.

According to the deodorizing device 12 having such a structure,
In the lower part of the processing chamber 13, the malodorous gas ejected from the ejection holes 15 of the ejection pipe 14 is filled in each honeycomb structure 16 constituting the honeycomb layer 18 and is 50 to 70% of the water sprayed from the water sprinkler 23. Water-containing deodorant material 2 containing some water
Rise through the 0 void. At this time, odorous components such as ammonia of the malodorous gas are collected by the water-containing deodorizing material 20, decomposed by microorganisms inside, deodorized, and discharged from the upper outlet 27.

In this case, since the hydrous deodorant material 20 is filled in the space 17 of each honeycomb structure 16 of the laminated honeycomb layers 18, the load of the hydrous deodorant material 20 applied below is divided, and the hydrous deodorant material 20 is separated. The material 20 does not cause a compaction phenomenon, a high void of the hydrous deodorant material 20 is secured for a long period of time, the ventilation resistance is suppressed to a minimum, and the environment of microorganisms, water and air can be optimally maintained, and deodorization can be performed. The activity of microorganisms can be maintained and good deodorizing efficiency can be maintained.

As described above, according to the present invention, unlike the above-mentioned conventional example, the compaction phenomenon does not occur, and the aeration medium having a mixture of several kinds is not required, and as described above, the high void content of the hydrous deodorant material is not required. Since the ventilation resistance is minimized, a small blower can be used even if the height of the hydrous deodorizing material is high.

Here, an embodiment carried out by the inventors of the present application will be described. As an example, the height of one step is 0.5 m
4 layers of the above honeycomb structure are stacked to form a honeycomb layer having a height of 2 m.
The third step is 0.5m of hydrous deodorant on the third honeycomb layer.
Filled to the thickness of. On the other hand, in the comparative example, rock wool granules were stacked at a height of 2 m, and the ventilation resistance of both was confirmed. The results are shown in the graph of FIG. As can be understood from this graph, compared with the comparative example, in the example of the present invention, the ventilation resistance of the malodorous gas passing through the hydrous deodorizing material is small, but the comparative example is
It showed airflow resistance of more than 6 times, and was found to promote excellent air permeability in the present invention, and the effect of preventing consolidation could be confirmed.

[0022]

As described above, according to the present invention,
By filling the space of each honeycomb structure with a water-containing deodorizing material that deodorizes malodorous gas in the processing chamber, and by stacking the honeycomb structures in multiple layers in the vertical direction, the load applied below the water-containing deodorizing material is divided. , The hydrated deodorant in each honeycomb structure does not have a compaction phenomenon, high voids of the hydrated deodorant are secured for a long period of time, and the environment of microorganisms, water and air can be optimally maintained, so that the activity of deodorant microorganisms is maintained. A good deodorizing work can be performed.

Further, since the water-containing deodorant in the space of each honeycomb structure can secure a high void as described above, the ventilation resistance can be minimized, and even if the height of the water-deodorant increases, it is small. Blower can be used. Moreover, since the honeycomb structure can be unitized by using the honeycomb structure for the honeycomb layer, the cost can be reduced, the quality can be stabilized, the construction period can be shortened, and the maintenance can be easily performed.

[Brief description of drawings]

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

FIG. 2 is a perspective view of a honeycomb layer.

FIG. 3 is a side view of a processing chamber of the deodorizing device.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a sectional view taken along line BB of FIG. 3;

FIG. 6 is a graph showing a comparison of airflow resistance between the device according to the present invention and a comparative example.

[Explanation of symbols]

 13 Processing Chamber 16 Honeycomb Structure 17 Space 18 Honeycomb Layer 20 Hydrous Deodorant 21 Grit

Claims (4)

[Claims] 1. In a deodorizing method for introducing a malodorous gas into a deodorizing material in a processing chamber to deodorize it, the malodorous gas which is introduced into a lower end portion of the processing chamber through a ventilation duct by a blower and is ejected from an ejection port is On the grit in the processing chamber having a water sprinkler, a honeycomb at the bottom of the honeycomb layer composed of a plurality of honeycomb structures that are filled with a water-containing deodorizing material consisting of a microbial carrier and inoculum in the space A deodorizing method characterized by deodorizing malodorous gas by guiding it to the lower surface of the layer. 2. A deodorizing method for deodorizing a malodorous gas by introducing the malodorous gas into a deodorizing material in a processing chamber, and introducing the malodorous gas into the lower end of the processing chamber through a ventilation duct by a blower, and the malodorous gas ejected from the ejection hole is On the grit in the treatment chamber having a sprinkler in the vertical direction honeycomb layer consisting of a plurality of honeycomb structure filled with a microbial carrier of hydrous deodorant in the space, and inoculated with seeds between the layers. A deodorizing device that guides the lower surface of the lowermost honeycomb layer that is laminated to deodorize malodorous gas. 3. The deodorizing method according to claim 1, wherein the microbial carrier of the hydrous deodorizing material is a porous rock wool granular material. 4. The deodorizing method according to claim 1, wherein the microorganism carrier of the hydrous deodorizing material is a porous rock wool molded product.