JPH0521585B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a method for producing a deodorizing agent for all kinds of bad odors generated from household waste, industrial waste, agricultural and livestock waste, etc. [Prior art] The deodorizers that have been conventionally used are:
As seen in activated carbon, etc., it has a strong ability to adsorb bad odors. [Problems to be Solved by the Invention] The conventional techniques described above had 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 deodorizer that does not require regeneration by regenerating the adsorbent using microorganisms that have the ability to decompose malodorous components. It is necessary to have the ability to adsorb bad odors and at the same time to have the ability to allow microorganisms to exist stably. In such a deodorizing agent, pores for microorganisms where microorganisms exist and pores for adsorbing malodorous components, which have different sizes, 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,
Using coal that has been sized to a certain particle size range after pulverization, it can be granulated with binder oil.In addition, as the skeleton carbon of the above-mentioned carbon porous body, various organic polymer compounds such as plastics can be used instead of the above-mentioned coal. Carbide or coke can be used, and the carbon porous body may be a granulated material obtained by granulating skeleton carbon obtained by pulverizing coal or the like and sifting particles of a predetermined size into several types, using coal tar as a binder oil. is heated at a predetermined temperature increase rate in a reducing atmosphere, held at a predetermined temperature for a predetermined period of time to carbonize, and then this carbide is activated at a predetermined temperature while flowing steam. In this case, microorganisms capable of decomposing malodorous components may be attached to the carbon porous material by immersing the carbon porous material in a culture solution containing the microorganisms for a predetermined period of time. The size of the pores for microorganisms can also be controlled by the size of the particles. [Function] The results of a performance confirmation test conducted on the deodorizer of the present invention using an adsorption test device 3 as described below will be reported. In the figure, 3A is a carrier gas, 3B is a gas flow rate 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, 3H is a malodorous gas detection unit, 3I
indicate tape heaters, respectively. A carbon porous body was loaded into the adsorption test apparatus 3 shown in FIG. 3, and a malodor was adsorbed until the adsorption sites of the carbon porous body 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, which 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] Explanation of Table 1 (from Figure 2) A-1: There are relatively many pores, but there are pores of about 8 microns that are considered to be easy for microorganisms to play an active role.
2. Less than A-3~. A-2, A-3: There are many pores overall, but there are especially many pores of 8 microns or more compared to the others. A-4: There are fewer pores overall. The microorganism used here was one of the actinomycetes collected from chicken manure. Porous carbon materials, including commercially available activated carbon, which have poor adhesion ability for microorganisms, have hardly recovered their adsorption ability, but they have pores that allow microorganisms to exist stably.
A significant recovery in the amount of adsorption was observed on the carbon porous material, which has a high ability to attach microorganisms. [Embodiments of the Invention] Examples will be described with reference to the drawings. 1 is a deodorizing agent obtained according to the present invention, and a carbon porous body 2;
It is composed of microorganisms (not shown) fixed to the carbon porous body 2 and having the ability to decompose malodorous components. Therefore, the above-mentioned carbon porous body 2 is made by using as raw material skeletal carbon 2A obtained by sieving and sifting crushed coal, coke, etc., and adding binder pitch 2B to it and granulating it to form pores 2C for microorganisms. is causing it. That is, as shown in FIG. 1, pores 2A1 suitable for adsorbing bad odors are developed in the skeleton carbon of coal, coke, etc., and pores 2A1 for microorganisms necessary for the presence of microorganisms are created.
By expressing C between the sized skeletal carbon particles, the desired carbon porous body 2 is obtained. 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 1 to 10°C/min in a reducing atmosphere to 500°C.
Carbonization was achieved by holding at 900°C for 1 to 5 hours. This carbide was activated at 600° C. to 900° C. under steam flow (0.5 to 3.2 ml/min/g-sample) to produce a porous body. Table 2 shows the specific surface area and methylene blue adsorption amount of the produced carbon porous material by the BET method, and Figure 2 shows the distribution of microbial pores 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] The carbon porous bodies thus produced were immersed in a culture solution containing microorganisms capable of decomposing malodorous components for 1 to 5 hours to allow microorganisms to adhere to the carbon porous bodies. 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 carried out as follows. Fresh pig feces was collected within 12 hours after excretion and was used as a raw material for a culture medium for microorganisms (actinomycetes). The culture medium is a suspension of pig manure (20wt%) in distilled water, filtered through gauze, a pig manure extract, and 0.2wt ammonium nitrate.
% and 0.2 wt % of sodium nitrate, the pH of the solution was adjusted to 7.6 with caustic soda, and the solution was sterilized at 120° C. for 30 minutes. Approximately 10 wt% 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 Waxmann medium containing 1.5 wt% agar (glucose 1.0 wt%, peptone
0.5wt%, meat extract 0.5wt%, salt 0.5wt%, PH
7.0). After several days, each of the colonies formed on the medium was further cultured on Waxmann'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 that absorb bad odors and pores for microorganisms that allow microorganisms to stably exist, we are able to produce a malodor 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 shown in FIG. 1 according to the size of the microorganisms, that is, by changing the particle size of the raw 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 various microorganisms and porous carbon materials makes it possible to use them as all kinds of odor removers.

[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 the carbon porous material, and Figure 3 is a graph showing the distribution of pores in the carbon porous material.
The figure shows a malodor adsorption test device. DESCRIPTION OF SYMBOLS 1... Deodorizer, 2... Porous carbon material, 2A... Skeleton carbon, 2A1... Pore, 2B... Binder pitch, 2C... Pore for microorganisms.

Claims (1)

[Scope of Claims] 1 Granular carbide made from coal and having pores on the surface that adsorbs bad odors is granulated with binder oil as skeleton carbon, and pores for microorganisms are formed between the particles, and pores for microorganisms are formed between the particles. A method for producing a deodorizer, characterized in that microorganisms having the ability to decompose malodorous components are immobilized. 2. The method for producing a deodorizing agent according to claim 1, 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. 3. 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. 4. The method for producing a deodorizing agent 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.