JPH0295376A - Manufacture of deodorant - Google Patents

Abstract

PURPOSE:To manufacture an offensive odor remover whose self-reproduction is possible, whose service life is long and whose adsorptivity is high by fixing a microorganism having capacity for decomposing an offensive component to a carbon porous body. CONSTITUTION:A carbon porous body 2 is pelletized by using skeleton carbon 2A sized by sieving a pulverized matter of coal, coke, etc., as a raw material and adding a binder pitch 2B thereto. This pelletized matter is carbonized by heating at 1 to 10 deg.C/min temperature rise speed under a reducing atmosphere and holding it for 1 to 5 hours at 500 to 900 deg.C, activated under a flow of water vapor at 600 to 900 deg.C, by which a porous body is manufactured. This carbon porous body 2 is immersed into a culture solution containing a microorganism having capacity for decomposing an offensive odor component for 1-5 hours and the microorganism is allowed to adhere to the carbon porous body. This offensive odor remover adsorbs an offensive odor, and also, decomposes and desorbs the adsorbed offensive odor by the adhered microorganism and can be used as a processing agent which can readsorb an offensive odor, has a long service life and has a high offensive odor removing capacity.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for producing a deodorizer that targets all types of bad odors generated from household waste, industrial waste, agricultural and livestock waste, etc. It is something.

[Prior Art] Deodorizers that have been conventionally used have a strong ability to adsorb bad odors, such as activated carbon.

[Problems to be Solved by the Invention] The conventional techniques described above have the following problems.

Activated carbon and the like as a deodorizing agent have the disadvantage of desorbing the adsorbed bad odor and reusing the deodorizing agent, and usually must be regenerated by heating at a high temperature or be disposed of.

The present invention aims to develop a long-life deodorizing agent that does not require regeneration by regenerating such an adsorbent using microorganisms that have the ability to decompose malodorous components. A carbon-based porous material suitable for this purpose that stably supports microorganisms having the ability to decompose malodorous components has not been developed.

The present invention has been devised in view of the above-mentioned problems of the prior art, and its purpose is to provide a device that can do the following.

As mentioned above, a deodorizing agent using microorganisms must have the ability to adsorb bad odors and at the same time have the ability to maintain the stable presence of microorganisms.

In such a deodorizing agent, pores in which microorganisms exist and pores in which malodorous components are adsorbed must be functionally adjacent to each other.

The present invention was made for the purpose of producing a deodorizing agent using a porous carbon material having such a function.

[Means for Solving the Problems] In order to achieve the above object, the present invention is as follows.

This is a method for producing a deodorizer in which microorganisms capable of decomposing malodorous components are immobilized on a porous carbon material.

In this case, as the skeleton carbon of the carbon porous body, coal that has been pulverized and sized to a certain particle size range can be used and granulated with binder oil, and as the skeleton carbon of the carbon porous body, the coal Instead of plastic, carbide of various organic polymer compounds or coke can be used, and the above-mentioned porous carbon material can be made of skeletal carbon obtained by pulverizing coal or the like and then sieving into several types of particles of a certain size. The granulated material is granulated using coal tar as the binder oil.
It can be constructed by carbonizing by heating at a predetermined temperature increase rate in a reducing atmosphere and holding at a predetermined temperature for a predetermined time, and then activating this carbide at a predetermined temperature while flowing water vapor.

In this case, microorganisms capable of decomposing malodorous components may be attached to the carbon porous material by immersing it in a culture solution containing the microorganisms for a predetermined period of time, and
The size of the pores for microorganisms in the carbon porous body can also be controlled by the size of the skeleton carbon particles.

[Operation] Regarding the deodorizing agent of the present invention, the following adsorption test device 3 was used.
We report the results of performance confirmation tests conducted by

In the figure, 3A is a carrier gas, 3B is a gas flow adjustment valve,
3C is a gas flow meter, 3D is a malodorous gas generation part, 3E is a malodorous gas adsorption part, 3F is an adsorbent sample, 3G is a sampler, 3
H indicates a malodorous gas detection unit, and 3I indicates a tape heater.

Loading the carbon porous body into the adsorption test device 3 shown in FIG.
The odor was adsorbed until the adsorption sites of the carbon porous material were saturated.

Incidentally, the bad odor was continuously supplied to the adsorption layer through a generator maintained at a constant temperature.

After the porous carbon material that had lost its ability to adsorb bad odors was held at a constant temperature for 48 hours, it was allowed to adsorb bad odors again using an adsorption test device to examine the rate of recovery of its adsorption ability.

The same operation was performed on a carbon porous material to which no microorganisms were attached, and the amount of adsorption recovered only by the action of microorganisms was calculated from the difference between the two.

Examples of recovered adsorption amounts are shown in Table 1.

Table 1 Results of malodor removal test The microorganism used here is one of the actinomycetes collected from chicken manure.

Porous carbon materials, including commercially available activated carbon, that have poor adhesion ability for microorganisms have hardly recovered their adsorption ability, but porous carbon materials that have pores that allow microorganisms to stably exist and have a high ability to adhere to microorganisms can reduce the amount of adsorption. Significant recovery was observed.

[Embodiments of the invention] Examples will be described with reference to the drawings.

1 is a deodorizing tissue obtained according to the present invention, which is composed of a carbon porous body 2 and a microorganism fixed to the carbon porous body 2 and having the ability to decompose malodorous components (as shown in the diagram).

Therefore, the above-mentioned carbon porous body 2 is made by using skeleton carbon 2A obtained by sieving and sifting pulverized materials such as coal or coke as a raw material, and adding binder pitch 2B to it and granulating it.
Pores 2C for microorganisms are generated.

That is, as shown in FIG. 1, pores 2A1 suitable for adsorption of bad odors are developed in the skeleton carbon of coal, coke, etc., and pores 2C for microorganisms necessary for the presence of microorganisms are formed in the gaps between the sized skeleton carbon particles. The desired carbon porous body 2 is obtained by causing the carbon to develop.

Incidentally, Akahira charcoal was used as the coal and commercially available coal tar was used as the binder pitch.

In this case, the coal was pulverized and then sieved into several types of particles with a size of 0.5 mm or less.

The granules thus obtained were heated at a temperature increase rate of l or 610°C/min in a reducing atmosphere to a temperature of 500°C to 900°C.
Carbonization was achieved by holding at for 1 to 5 hours.

This carbide was heated at 600°C to 900°C under steam flow (0
, 5 to 3.2 ml/1 Ilin/g-sample)
Activation was performed to produce a porous body.

Table 2 shows the specific surface area and methylene blue adsorption amount of the produced carbon porous material measured by the BET method, and FIG. 2 shows the distribution of microbial pores measured by the mercury intrusion method.

In this case, when producing the carbon porous body, the size of the pores for microorganisms can be controlled by the size of the particles of the raw material.

Table 2 Physical properties of carbon porous material kl-B: Methylene blue adsorption amount The carbon porous material produced in this manner is immersed for 1 to 5 hours in a culture solution containing microorganisms capable of decomposing malodorous components. It was attached to a porous body.

This malodor remover can be used as a long-life treatment agent with high malodor removal ability that adsorbs malodors, decomposes and desorbs the adsorbed malodors by attached microorganisms, and makes it possible to re-adsorb the malodors.

The collection and pure culture of microorganisms capable of decomposing malodorous components were performed as follows.

Fresh pig feces within 12 hours after excretion were collected and used as a raw material for a culture medium for microorganisms (actinomycetes).

The culture medium was prepared by adding 0.2 wtk of ammonium nitrate and 0.2 wt of sodium nitrate to a pig feces extract obtained by filtering a suspension of pig I (20wt''4) in distilled water through gauze, and then dissolving it with diluted sodium chloride. The pH was adjusted to 7.6 and the mixture was sterilized at 120°C for 30 minutes.

Approximately 10 wtX of one of pig manure, chicken manure, and cow manure was added to this medium, and actinomycetes were cultured for 2 to 3 days at room temperature under air circulation.

Transfer one loopful of the culture solution to Waxman medium containing 1.5 wl of agar (glucose 1.0 wt 1, peptone 0.5 + r
tk, meat extract 0.5wt%i, salt Q, 5wt! 1°11117.0).

After several days, each colony that had formed on the medium was further cultured on Waxman's medium to collect pure actinomycetes.

Each of the collected actinomycetes was examined for its ability to remove bad odors, and the actinomycetes that had the ability to remove them were stored for use in removing bad odors.

[Effects of the Invention] Since the present invention is configured as described above, it produces the following effects.

In this way, by using a carbon porous material that has both pores for microorganisms that adsorb bad odors and pores that allow microorganisms to stably exist, we can produce a bad odor remover that can self-regenerate, has a long life, and has a high adsorption capacity. became possible.

Furthermore, by changing the size of the microorganism pores 2C in Figure 1 according to the size of the microorganisms, that is, by changing the particle size of the raw material carbon, it is possible to immobilize various microorganisms, and also to eliminate bad odors. The size of the pore 2A1 is changed depending on the type.

That is, by changing the carbonization conditions and activation conditions of the porous carbon material, it becomes possible to adsorb various bad odors.

In this way, the combination of each ff1l microorganism and the porous carbon material allows it to be used as a bad odor remover of all kinds.

[Brief explanation of drawings]

Figure 1 is an enlarged view of the main parts of the deodorizer, Figure 2 is a graph showing the distribution of pores in a carbon porous body, and Figure 3 is a malodor adsorption test device. 199. Deodorizer, 211. Porous carbon material, A. Skeletal carbon, B. Binder pitch, 2C, Pore for microorganisms. Patent Applicant Sumitomo Coal Mining Co., Ltd. - Agent Patent Attorney Kawa Naruta Fudai] Figure Diagram Pore Half 1 (A)

Claims (1)

[Scope of Claims] 1. A method for producing a deodorizing agent, characterized in that microorganisms capable of decomposing malodorous components are immobilized on a carbon porous material. 2. The method for producing a deodorizing agent according to claim 1, wherein coal that has been pulverized and sized to a certain particle size range is used as the skeleton carbon of the carbon porous body, and the coal is granulated with binder oil. 3. The method for producing a deodorizing agent according to claim 2, wherein carbonized materials of various organic polymer compounds such as plastics or coke are used instead of the coal as the skeleton carbon of the carbon porous body. 4. The above-mentioned carbon porous body is made by pulverizing coal, etc. and sieving it into several types of particles of a predetermined size, and then granulating the skeletal carbon using coal tar as a binder oil. 2. The method for producing a deodorizing agent according to claim 1, wherein the deodorizing agent is carbonized by heating at a temperature increasing rate and held at a predetermined temperature for a predetermined time, and then activated under steam flow at a predetermined temperature. 5. The method for producing a deodorizing agent according to claim 1, wherein microorganisms are attached to the carbon porous material by immersing the carbon porous material in a culture solution containing microorganisms having the ability to decompose malodorous components for a predetermined period of time. 6. The method for producing a deodorizer according to claim 1, wherein the size of the pores for microorganisms in the carbon porous body is controlled by the size of the skeletal carbon particles.