JP2002079047A - Livestock excretion deodorizing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deodorizing apparatus for removing malodorous gas generated in a process for composting livestock excretion. SOLUTION: In the lievestock excretion deodorizing apparatus, preliminarily dehymidified malodorous gas is sucked from a house having a double hermetically closed structure, which has an outside house comprising a transparent cover and an openable and closable inside house comprising an opaque cover, in composting equipment and passed through a deodorizing tower, which consists of a plurality of cartridge type tanks filled with general charcoal and/or impregnated charcoal, to be deodorized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deodorizing apparatus for removing an odor generated from a composting facility for livestock manure.

[0002]

2. Description of the Related Art In the course of composting livestock manure, development of an effective deodorizing apparatus has always been desired in order to solve the problem of odor generated from a composting facility or the like. As one of the countermeasures, for example, as disclosed in Japanese Patent Application Laid-Open No. 11-128666, a dust removing device that removes air containing odor generated from a fermenter for fermenting and composting livestock manure and the like, and removing dust. A deodorizing device for passing deodorized air and deodorized air through a rock wool deodorizing material in which microorganisms are immobilized in a material mainly composed of rock wool, thereby releasing deodorized air to the atmosphere. As shown in the livestock manure deodorizer and Japanese Patent Application Laid-Open No. H11-19620, in order to process organic waste including food waste, animal dung, and residues from food processing using fermentation bacteria, the fermentation tank is used. Organic waste treatment apparatuses and the like that ferment organic waste while dehumidifying air have been proposed.

[0003]

However, deodorization by microorganisms such as soil deodorization and biological deodorization has been carried out as a relatively simple method as in the above-described apparatus, but it requires a large installation area and has a low temperature. At the present, there is a need for a compact, inexpensive, and easy-to-handle deodorizing device because microorganisms may be killed due to changes and the like.
SUMMARY OF THE INVENTION The present invention has been made to address the above-mentioned demands, and has been developed by providing a deodorization tower comprising a plurality of cartridge-type tanks filled with inexpensive general charcoal and / or impregnated charcoal as a deodorant. By reducing costs and circulating the odor in the composting facility and pre-dehumidifying, the deodorization tower can be made compact and efficient, and the outer house of the double sealed structure house that covers the composting facility can be constructed. It is an object of the present invention to provide a livestock manure deodorizing apparatus capable of preventing seasonal changes in a composting rate by enabling a transparent cover and an opaque cover of an inner house to be opened and closed.

[0004]

SUMMARY OF THE INVENTION The gist of the invention is as follows: (1) By passing odors generated from a livestock manure composting facility through a deodorization tower filled with general charcoal and / or impregnated charcoal. A livestock manure deodorizer characterized by performing a deodorizing treatment. (2) The composting facility for livestock manure is hermetically sealed, the odor in the composting facility is taken out, sent to a dehumidification tower, and the odor dehumidified by the dehumidification tower is automatically returned to the composting facility for circulating dehumidification. The livestock manure deodorizing device according to the above (1), characterized in that: (3) The above (1) or the above (1), wherein the hermetic composting facility for livestock manure is sealed in a house-type double structure, the outer house is made of a transparent cover, and the opaque cover of the inner house is openable and closable. (2) The livestock manure deodorizing device described in (2).

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the accompanying drawings. FIG. 1 is a diagram showing an outline of a series of process devices of a dehumidification and deodorization tower according to the present invention. As shown in this figure, it is composed of a deodorizing tower 1 filled with charcoal, a composting facility 2 and a dehumidifying tower 3, and a fermentation / composting material such as livestock manure is stirred in the composting facility 2, and fermentation / composting is performed. Fermentation tank 4 is provided, and the fermentation tank 4 is sealed in a double structure house, and the malodorous gas consisting of air containing odor generated from the fermentation tank 4 is taken out from the upper part of the composting facility 2, It is sent to a dust removing device 5 which is composed of a mist separator, a cyclone or the like, and also serves for dust removal and dust removal. The air containing the odor removed by the dust removal device 5 is sent to the deodorization tower 1 by the blower 6, and after being deodorized, the deodorized gas is discharged from the chimney.

On the other hand, the air containing the odor generated from the fermenter 4 in the composting facility 2 is sent to the dehumidifying tower 3 by the blower 7, and the air containing the deodorized odor is returned to the composting facility 2 again.
It is returned inside and circulates. That is, when the humidity of the air containing odor generated in the composting facility 2 is high, the gas generation from the compost is poor and the composting (composting) is delayed.
Therefore, in order to promote composting, it is necessary to keep the humidity low.

Therefore, in the present invention, the humidity in the composting facility 2 is automatically measured by installing the humidity detector 8, and when the humidity inside the composting facility 2 rises, the damper 9 is used.
Is opened, the blower 7 is automatically operated, and at the same time, the refrigerator 10 is operated, and air containing odor generated in the composting facility 2 is sucked through the odor suction pipe 13, and the dehumidifying tower 3 is opened.
And the refrigerant gas from the refrigerator 10
1.12 circulated through the odorous air is dehumidified,
After the temperature is lowered, it is sent to the composting facility 2.

As described above, the humidity detector 8 automatically controls the humidity quantitatively, the hygrometer for automatically maintaining the high-efficiency operation control is installed, and the automatic operation of the dehumidification tower (ON-ON) is performed.
OFF operation). In this case, the standard of humidity is set between 40% and 70% depending on the source of compost, moisture of compost, size of compost house, and the like. Dehumidification tower 3
Is for dehumidifying the air containing odor in the composting facility 2 and circulating the dehumidified air back into the composting facility 2 again. As a result, convection of the air inside is generated, so that there is no place for odor accumulation in the lower part or the like, and it also leads to prevention of dew condensation.

The location of the intake of the odor-containing air in the composting facility 2 and the location of the return port of the odor-containing air after dehumidification to the composting facility 2 are as follows. In addition, the return port should always be installed as far below the intake as possible with respect to the longitudinal direction of the composting facility 2 as far as possible without impeding the operation and equipment. Air containing a large amount of odor is sent to the dehumidification tower, and the dehumidification effect can be enhanced.
The operation in the deodorization tower is always performed irrespective of the dehumidification in the dehumidification tower because the odor gas is always generated in the composting facility 2.

Further, the deodorizing tower 1 is of a cartridge type,
It is composed of a plurality of tanks whose surfaces perpendicular to the gas flow have a mesh structure, so that only tanks that have no odor effect (breakthrough) can be easily attached and detached and the deodorant can be replaced. That is, the deodorization tower 1 is composed of a filling tank having three tanks, a general charcoal tank 14 in the front part, an acid impregnated charcoal tank 15 in the middle part, and a general charcoal tank 14 in the rear part.
Was provided. In addition, a wind direction adjustment damper 16 is provided in front of the deodorant filling section so that the gas flow can be optimally adjusted. As the filler, a combination of impregnated coal and untreated coal is used and the particle size is selected according to the type and concentration of the generated odor.

Based on such a configuration, the general charcoal tank 14 is filled with general charcoal. In addition, the filler has a charcoal particle size of 2 to 20 mm. In addition, by using general charcoal as a deodorant, it can be produced at a complicated production process (activation process, etc.) such as activated carbon, and is expensive.
It is possible to recycle the soil as a soil conditioner after the deodorization is completed, and the use of acid or alkali-impregnated charcoal enables more effective deodorization of alkaline odor and acidic odor than activated carbon.

As described above, by dehumidifying before deodorizing, the absorption of water into the deodorant is reduced,
The life of the deodorant can be extended. Further, as the amount of generated steam by the blower of the deodorization tower is reduced, the required ventilation amount can be reduced, and the equipment can be made more compact. Further, the dehumidifying tower 3 can be installed between the dust removing device 5 and the blower of the deodorizing tower 1, but the circulation type independent of the deodorizing system has a higher dehumidifying effect.

Further, the outer house 17 of the double structure house constituting the upper part of the composting facility 2 is a transparent house using a cover such as a transparent tent cloth, and the inner house 18 is U-shaped.
V (ultraviolet) opaque cloth with light-shielding properties,
Open and do not use a cover for daylighting in winter, but close and use the cover at night to prevent dew condensation, and close in summer for sun protection and UV blocking. For this purpose, a wall tent opening / closing device 19 and a roof tent opening / closing device 20 are provided to provide a curtain-type structure capable of winding up the wall tent fabric and winding the roof tent fabric.

[0014] With such a configuration, in the case where the outer house is sealed with a single cover, the temperature difference between the inside and the outside increases in winter, so that dew condensation occurs on the inner surface of the cover, and the dew forms as water droplets on the compost. Falling and flooding may cause composting delay and corrosion of the compost building steel frame.However, if a double structure is used, it is possible to prevent dew condensation on the inner surface of the inner house cover, and between the double cover The generated dew water flows down naturally and can be discharged outside the system. Further, by closing the cover of the inner house, it is possible to prevent the compost from being excessively dried due to a rise in the temperature of the inner house 18 in summer. In this manner, the compost deposited in the composting facility 2 undergoes a fermentation period of 1 to 3 months, microbially decomposes readily decomposable substances in an aerobic state by fermentation with aerobic bacteria, and It is intended to change to stable properties that can be reduced.

On the other hand, Table 1 shows the results of deodorization of the air containing odor generated in the composting facility of the above embodiment by the deodorization tower. As shown in Table 1, the deodorization tower of the present invention is also effective against alkaline odors such as acidic odors such as hydrogen sulfide, propionic acid, normal valeric acid, methyl sulfide, methyl disulfide and the like, which are malodorous components. It can be seen that the offensive odor components are effectively and deodorized. The measured values are data one month after the start of deodorization, and the unit is ppm.

[0016]

[Table 1]

[0017]

As described above, according to the livestock manure deodorizing apparatus of the present invention, inexpensive charcoal can be used as a deodorant, running costs can be reduced, and the charcoal itself is made of minerals. Since it is alkaline, it effectively deodorizes acidic odors (hydrogen sulfide, methyl metacaptan, lower fatty acids, etc.). Also, by using acid-impregnated charcoal, it is possible to more effectively deodorize alkaline odors such as ammonia than activated carbon. Furthermore, the waste charcoal after deodorization can be recycled for soil improvement.

Further, by circulating and dehumidifying air containing odor in the composting facility in advance, most of generated steam and a part of ammonia odor and the like are removed in advance. That is, the conventional standard ventilation volume when closed for deodorization is about 10 times the closed volume per hour (10 times ventilation) in order to extract steam generated in the composting process and promote composting. However, in the case of the present invention, since the dehumidification is carried out in advance, composting proceeds sufficiently at about half of the standard ventilation (5 times ventilation), and the entire deodorization tower (suction dust,
(Blower, deodorization tower, etc.) can be made compact, equipment costs can be reduced, and running costs (electric power costs) can be reduced.

Further, since a part of the ammonia odor or the like is removed in advance, the load of the malodorous substance on the deodorant in the deodorization tower is reduced, and the life of the deodorant can be extended. In addition, the fermenter is covered with a double-structured house, the outer house is transparent, and the opaque inner house is closed in summer and open in winter to change the temperature in the compost tank according to the season. And an extremely excellent effect such as stabilizing the composting speed.

[Brief description of the drawings]

FIG. 1 is a diagram showing an outline of a series of process equipment of a dehumidification and deodorization tower according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Deodorization tower 2 Composting facility 3 Dehumidification tower 4 Fermenter tank 5 Dust remover 6, 7 Blower 8 Humidity detector 9 Damper 10 Refrigerator 11, 12 Refrigerator pipe 13 Odor suction pipe 14 General charcoal tank 15 Acid-soaked charcoal tank 16 Wind direction Adjustment damper 17 Outer house 18 Inner house 19 Wall tent opening and closing device 20 Roof tent opening and closing device

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) // B01J 20/20 (72) Inventor Yuji Shigeishi 3-1-11 Matsubaracho, Oita City, Oita Prefecture Oita Steel Bill Inside the Oita branch of Hara (72) Inventor Takehito Suzuki 3-1-11 Matsubara-cho, Oita-shi, Oita Steel building in Oita branch of Tehara original company (72) Shiro Yamashita 3-1-11, Matsubara-cho, Oita-shi, Oita Oita (72) Inventor: Shohachiro Abe, 3989-1, Oji, Kusumi-cho, Naira-gun, Oita Pref. BA04 BA14 BA16 CA07 EA02 4D004 AA02 BA04 CA18 CA48 CB04 DA01 DA08 4G066 AA04A AA04B CA02 DA01 EA20 4H061 AA03 CC36 GG70

Claims (3)

[Claims] 1. A livestock manure deodorizing apparatus characterized in that an odor generated from a livestock manure composting facility is passed through a deodorizing tower filled with general charcoal and / or impregnated charcoal to deodorize the livestock manure. 2. A recirculation type dehumidifier for automatically closing a composting facility for livestock manure, taking out the odor in the composting facility, sending it to a dehumidification tower, and returning the odor dehumidified by the dehumidification tower back to the composting facility. The livestock manure deodorizing device according to claim 1, wherein the deodorizing device is used. 3. The method according to claim 1, wherein the composting facility for livestock manure is hermetically sealed with a house-type double structure, the outer house is made of a transparent cover, and the opaque cover of the inner house is openable and closable. Or the livestock manure deodorizer according to 2 above.