JP3007078B1 - Deodorizing equipment using microorganisms - Google Patents

Abstract

The running cost of a gas-liquid contact device that uses a chemical to remove malodorous components increases. An object of the present invention is to provide an apparatus for treating malodorous gas, in which the running cost can be reduced to about 1/10 or less as compared with the chemical type by using microorganisms instead of chemicals. SOLUTION: A deodorizing apparatus utilizing microorganisms according to the present invention comprises a supply device (1) for malodorous gas, a treatment device (2) connected to the supply device (1), and a discharge device for treated gas ( 3). The processing device (2) includes a gas passage (4), a plurality of sheets (5) closing the passage (4), and a cleaning liquid supply / discharge device (6) for the sheet (5). I have. The sheet (5) is made of high-density polyethylene having a large space in which uniform micropores of a limited size are continuous and having gas passages (7), and microorganisms are entrapped and fixed at a high density.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deodorizing apparatus utilizing microorganisms, for example, to deodorize odorous gas generated from a sewage treatment plant, a human waste treatment plant, a slaughterhouse, a poultry farm or a pig farm using the oxidizing action of microorganisms. Device.

[0002]

2. Description of the Related Art A large number of gas-liquid contacting devices (Japanese Patent Publication No. 5-12007), filed by the applicant of the present invention, have been accepted in the market in terms of their deodorizing efficiency.

[0003]

However, this gas-liquid contact device has a drawback that the running cost is inevitably increased because a chemical is used for removing malodorous components. An object of the present invention is to provide an apparatus for treating malodorous gas, in which the running cost can be reduced to about 1/10 or less as compared with the chemical type by using microorganisms instead of chemicals.

[0004]

According to the present invention, there is provided a deodorizing apparatus utilizing microorganisms comprising a device for supplying a malodorous gas, a processing device connected to the supply device, and a device for discharging a processed gas. The processing apparatus has a gas passage, a plurality of sheets closing the passage, and a device for supplying and discharging a cleaning liquid to and from the sheet. The sheet is made of high-density polyethylene which contains a large space in which uniform micropores of a limited size are continuous and has gas passages. Then, microorganisms are comprehensively fixed on the sheet at a high density.

[0005] Microorganisms include aerobic activated sludge bacteria. In addition, examples of the odorous gas include those emitted from sewage treatment plants, human waste treatment plants, poultry houses, and pig farms, such as hydrogen sulfide and organic sulfur compounds. Generally, a blower is employed as the supply device. The malodorous gas is sent into the processing device by this supply device and flows through the internal processing passage.

In the processing apparatus, the processing path is closed by shifting the phases of the plurality of sheets so that the gas passage holes do not overlap on the projection surface. As described in Japanese Patent Application Laid-Open No. H8-10557 filed earlier by the present applicant, the property of this sheet is "POLEX" (POLEX).
TECHNOLOGIES is a high-density polyethylene. The number of the sheets is appropriately determined according to the density and the amount of the malodorous gas to be processed.

The malodorous gas sent into the processing apparatus hits the surface of the sheet on the front side in the flow path, generates a turbulent flow, branches off, and passes through the gas through hole of the sheet. The passed gas hits the surface of the second sheet and generates a turbulent flow here as well, and passes through the gas through hole of the second sheet as in the previous case. The passed gas hits the surface of the third sheet and causes turbulence. In this case as well, the gas passes through the gas passage of the third sheet. Hereinafter, the same gesture is repeated according to the number of sheets, and finally, the processed gas is discharged to the outside through the discharge device. Due to the turbulence on the sheet surface, the odorous gas sufficiently contacts the sheet surface,
After dissolving in the water retained in the sheet, the odor components will be ingested by the microorganisms that are entrapped and fixed.
Since the micropores for entrapping and fixing microorganisms are limited in size to protozoa and filamentous fungi that are inactive in the treatment of malodorous components, only microorganisms effective for the treatment can live in high density.

In the processing apparatus, a humidifying unit is provided on an upstream side of the processing passage and an odor component removing unit is provided on a downstream side, and the odor component removing unit may include a dehumidifying unit at an end of the downstream side. The humidification unit is for converting the malodorous gas into a saturated steam gas, and by this humidification, prevents moisture from evaporating from the habitat of microorganisms, thereby facilitating ingestion of malodorous components contained in the malodorous gas. Generally, a nozzle is provided in the path of the odorous gas, and water is pumped by a water supply device to spray the odorous gas from the nozzle. The odor component removing unit is configured such that while the humidified and moist odorous gas passes through the odor component removing unit, microorganisms take in the odor component contained in the odorous gas as a nutrient source and remove the odor component by an oxidizing action. Is what you do. The mist removal unit removes water droplets and discharges them to the outside, and is of the same type as that employed in the above-described apparatus.

The processing apparatus may be one in which a unit having the odor component removing unit and the mist removing unit is combined for each malodor component to be removed. In the case of treating malodorous gas containing various malodorous components, it can be easily coped with by increasing the number of the unit sections according to the type.

[0010] The upstream side of the unit on the flow path of the odorous gas is used for hydrogen sulfide, and the downstream side is used for an organic sulfur compound. Common odorous gases that require deodorization include hydrogen sulfide and organic sulfur compounds. In this case, a microorganism that ingests hydrogen sulfide and a microorganism that ingests organic sulfur compounds must be prepared. , Will die.

[0011] humidification unit may be configured to supply moisture該悪odor bodies 1 m ³ per 50～100Cc.
If the amount of water supplied for humidification is too small, the sheet dries and the habitat of microorganisms is deteriorated, so that the ingestion and oxidative action of malodorous components are inhibited.

The washing solution is suitable for microorganisms.
It may be kept in the range of ° C. When the metabolic by-products of the malodorous components ingested by the microorganisms accumulate on the sheet, the deodorizing performance deteriorates. Therefore, the cleaning liquid is sent to each sheet as needed. Metabolic by-products washed away by the washing solution are discharged out of the housing. In this case, if the temperature of the washing liquid is too high or too low, the biological activity of the microorganism is reduced or killed.

The sheet has a rectangular shape, and a plurality of sheets form a cartridge set in an outer frame with a space between each other. The outer frame is detachable on one side. It may be possible. When the sheets are one by one, it is difficult to handle, but since a plurality of sheets are set to form a cartridge, it is easy to handle. In addition, since the sheet can be inserted and removed by removing one side of the outer frame, it is convenient when replacing the sheet with a new one when the sheet is damaged, or when replacing the sheet with a comprehensively fixed sheet when the microorganisms have died. .

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference numeral 1 denotes a supply device for a malodorous gas, 2 denotes a treatment device connected to the supply device 1, and 3 denotes a discharge device for a treated gas. The processing apparatus 2 has a gas passage 4, a plurality of sheets 5 closing the passage 4, and a cleaning liquid supply / discharge device 6 for these sheets 5.

As shown in FIG. 3, the sheet 5 has a large space in which uniform micropores of a limited size are continuous, and has a gas through hole 7, so that microorganisms can be introduced into the sheet at a high density. Fixed. As described above, this material is similar to the material adopted in Japanese Patent Application Laid-Open No. H8-10557 filed by the applicant of the present application, and has a trade name of "POLEX" (POLEX).
TECHNOLOGIES, Inc.).

The number of sheets 5 and the types of microorganisms to be comprehensively fixed are determined according to the concentration and properties of the malodorous gas to be treated. The required number of sheets 5 are loaded into the processing apparatus 2 while keeping an interval therebetween and closing the processing path 3.

The malodorous gas sent from the supply device 1 flows into the processing device 2, hits the surface of the sheet 5 while passing through the processing passage 3, and becomes turbulent, and gradually passes through the through hole 7 to the next sheet 5.
Turbulence also occurs here. In the same manner, the odorous gas is dissolved in the water retained in the sheet 5 while passing through the processing passage 3, and is taken up by the microorganisms that are entrapped and fixed. The odorless gas is discharged to the outside through the discharge device 3 by this action.

The processing apparatus 2 has a humidification unit 21 on the upstream side of the processing passage 3 and an odor component removal unit 22 on the downstream side. The odor component removal unit 22 has a mist removal unit 23 at its downstream end. I have. In this case, the humidifying unit 21 gives moisture to the stench gas,
The habitat of microorganisms can be protected from drying. Generally, the nozzle 24 is provided in the processing path 3 for the odorous gas,
Water is fed under pressure by the water supply device 25 and sprayed from the nozzle 24 onto the odorous gas.

The odor component removing unit 22 removes the odor component contained in the odor gas by microorganisms while the humidified and moist odor gas passes through the odor component removing unit 22. Then, the mist of the cleaning water is removed from the gas from which the odor component has been removed by the mist removing unit 23 and discharged to the outside. This mist removal unit 23
Is of the same type as that used in the above-described apparatus, and has a number of V-shaped cross-section rods that are opened in the gas inflow direction and juxtaposed vertically.

The processing apparatus 2 has a unit 2a having an odor component removing unit 22 and a mist removing unit 23 for each malodor component to be removed.
In this way, when treating malodorous gas containing various types of malodorous components, it is possible to easily cope with the problem by increasing the number of unit portions 2a according to the types and comprehensively fixing different types of microorganisms respectively. .

The unit 2a has an upstream portion for hydrogen sulfide and a downstream portion for organic sulfur compounds on the odor gas flow path. In this case, in the case of hydrogen sulfide and organic sulfur compounds, which are malodorous components of a common malodorous gas, the hydrogen sulfide is removed first, and the hydrogen sulfide reduces the activity of the microorganisms for organic sulfur compounds or kills them. I won't.

The humidifying unit 21 supplies 50 to 100 cc of water per m ^{3 of} odorous gas. In this way, humidification of the odorous gas is performed without excess and
The habitat of microorganisms can be maintained well.

The washing liquid is kept at 5 to 35 ° C. In this way, the metabolic by-products attached to the sheet 5 are
Since cleaning can be performed for each deodorizing unit, the physiological activity of the microorganism can be maintained in a good state.

The sheet 5 has a rectangular shape, and a plurality of the sheets 5 are set on an outer frame 31 with an interval therebetween to form a cartridge 32. The outer frame 31 has one side 33 detachable.
By removing this side 33, the seat 5 can be replaced. This facilitates handling because a plurality of sheets 5 are set. Also, one side 33 of the outer frame 31
By removing the sheet, the sheet 5 can be inserted and removed, so that it is convenient when the sheet 5 is damaged and replaced with a new one, or when the microorganisms are killed, the sheet is replaced with a comprehensively fixed sheet.

In the drawings, reference numeral 35 denotes a hole for hooking when the cartridge 32 is lifted or lowered, and reference numeral 36 denotes a nozzle for pouring the cleaning liquid onto the sheet 5.

[0026]

According to the present invention, the processing path of the odorous gas of the processing apparatus is closed by a plurality of sheets so that the gas paths do not overlap each other on the projection plane, and the sheets are covered with microorganisms. The odor gas naturally passes through each sheet while causing turbulence in front of each sheet, increasing the chances of contact between the sheet and the odor gas. The gas can be supplied, and after the malodorous components are efficiently removed, the gas can be released to the outside without odor. Further, since microorganisms are used instead of chemicals, the running cost can be reduced to about 1/10 or less as compared with the chemical type. Further, since the apparatus has a device for supplying and discharging the cleaning liquid to and from the sheet, oxidation by-products of malodorous components and dead bodies of microorganisms can be washed off the sheet, thereby preventing a reduction in processing efficiency.

According to the second aspect, since the humidifying unit gives moisture to the odorous gas, the habitat environment of the microorganisms in the odorous component removing unit is favorably maintained, so that the odorous component contained in the odorous gas is ingested. Easier to do. Further, the mist of the cleaning water contained in the purified gas can be removed by the mist removal unit and discharged to the outside.

According to the third aspect, the number of unit parts is increased or decreased according to the number of types of malodorous components contained in the malodorous gas, and microorganisms of different types are respectively included and fixed, thereby easily responding. Can be.

According to the fourth aspect, in the case of hydrogen sulfide and an organic sulfur compound which are malodorous components of a common malodorous gas, hydrogen sulfide is removed first, so that the function of the microorganism for the organic sulfur compound is reduced by the hydrogen sulfide. No damage or death.

According to the fifth aspect, the humidification unit humidifies the malodorous gas without excess and deficiency, and the physiological activity of the microorganism is maintained well.

According to the sixth aspect, the metabolic by-product of the malodorous component deposited on the sheet is appropriately washed so that the biological activity of the microorganism is not reduced or killed.

According to the seventh aspect, since a plurality of sheets are set as a set, it is easy to handle, and when the sheets are exchanged, or when the microorganisms are exchanged for the once more comprehensively fixed sheets when the microorganisms have been killed, etc. The seat can be inserted and removed simply by removing one side of the frame.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a deodorizing apparatus using microorganisms according to the present invention.

FIG. 2 is a conceptual diagram of another example.

FIG. 3 is a front view illustrating an example of a cartridge.

FIG. 4 is a side view.

FIG. 5 is a plan view.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 supply device 2 processing device 3 discharge device 4 passage 5 sheet

──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. ⁷ identification code FI C12N 1/00 (58) Field surveyed (Int.Cl. ⁷ , DB name) B01D 53/38 B01D 53/34 B01D 53/48 B01D 53/77 B01D 53/81

Claims (7)

(57) [Claims] 1. An odor gas supply device (1), and the supply device
A processing device (2) connected to (1) and a device (3) for discharging a processed gas, the processing device (2) being a gas passage (4),
A plurality of sheets (5) closing the (4) and the sheets (5)
A cleaning liquid supply / discharge device (6) for the sheet,
(5) is characterized in that microorganisms are embedded and fixed at a high density, made of high-density polyethylene having a large space in which uniform micropores of limited size are continuous and having gas through holes (7). Deodorizing equipment that uses microorganisms. 2. The processing apparatus (2) includes a humidification unit (21) upstream of the passage (4) and an odor component removal unit (22) downstream.
The deodorizer using microorganisms according to claim 1, wherein the odor component removing unit (22) includes a mist removing unit (23) at the downstream end. 3. The processing apparatus (2) is a combination of a unit (2a) including the odor component removal unit (22) and the mist removal unit (23) for each odor component to be removed. A deodorizer using the microorganism according to claim 1. 4. The deodorization using microorganisms according to claim 3, wherein the unit (2a) has an upstream portion for hydrogen sulfide and a downstream portion for organic sulfur compounds on a flow path of the malodorous gas. apparatus. 5. The humidifying unit (21) is 1 m of the odorous gas.
^The deodorizer using microorganisms according to claim 2, wherein 50 to 100 cc of water is supplied per ³ units. 6. The cleaning solution according to claim 5, which is suitable for microorganisms.
The deodorizing apparatus using microorganisms according to claim 1, wherein the apparatus is maintained at a temperature of 35 ° C and can be appropriately cleaned for each deodorizing unit. 7. The cartridge (3) in which the sheets (5) are rectangular and a plurality of the sheets (5) are set in an outer frame (31) with a space therebetween.
2. The microorganism according to claim 1, wherein the outer frame (31) is detachable on one side (33), and the sheet (5) can be replaced by detaching the outer frame (31). Deodorizing equipment used.