KR102063332B1 - The manufacturing method of composition for bio filter for removing volatile organic compounds - Google Patents

Abstract

The present invention relates to a method for preparing a bio-filter composition for removing air pollutants which are volatile organic compounds. The method of the present invention comprises: a grinding step of grinding a porous carrier; a binder solution mixing step of mixing the ground porous carrier and a binder solution; a heat treatment step of thermally treating the porous carrier mixed with the binder solution; a microorganism input step of inputting microorganisms to the thermally treated porous carrier; and a growth promoter adsorption step of absorbing a growth promoter to the porous carrier input with the microorganisms. According to the present invention, the bio-filter composition for removing air pollutants which are volatile organic compounds of the present invention has an effect of easily converting T-VOCs (benzene, toluene, ethylbenzene, and xylene), which are hazardous chemical materials leaked by being included in an elastic flooring material installed in a bicycle road of a riverside, a child playground, a school playground, into carbon dioxide (CO_2), water (H_2O), minerals, etc. by using microorganisms.

Description

The manufacturing method of composition for bio filter for removing volatile organic compounds}

The present invention provides a method for preparing a composition for a biofilter for removing an air toxic substance that is an organic volatile compound, comprising: a grinding step of pulverizing a porous carrier, a binder solution mixing step of mixing the pulverized porous carrier and a binder solution, and the binder A microorganism is used, including a heat treatment step of heat-treating a porous carrier mixed with a solution, a microorganism input step of injecting microorganisms into the heat-treated porous carrier, and a growth promoter adsorption step of adsorbing a growth promoter on the porous carrier into which the microorganisms are injected. The present invention relates to a method for preparing a composition for a biofilter for removing an airborne toxic substance which is an organic volatile compound for converting the airborne toxic substance into carbon dioxide (CO ₂ ), water (H ₂ O), inorganic matters, and the like.

In general, a variety of elastic flooring materials such as bicycle roads, children's playgrounds, school playgrounds, riversides, daily living spaces, markets and stores, automobiles, chemical plants, industrial sites, sewage treatment plants, landfills, incinerators, large power plants and boilers It generates harmful gases and odors that are harmful or unpleasant to humans. Representative harmful gases and odorous substances include volatile organic compounds (VOC), ammonia, trimethylamine, acetaldehyde, methanethiol, methyl sulfide and disulfide. Methyl disulfide, hydrogen sulfide, nitrogen oxide, nitrogen dioxide, and styrene.

As public demand increases for a pleasant and harmless living environment, legal regulations on the release of airborne or odorous substances are being tightened. Deodorants that can effectively control or remove odorous substances and airborne substances are accompanied by this. And the development of deodorization equipment has been desperately required, many studies have been conducted.

Recently, as the social interest on environmental issues is heightened, efforts are being made to treat air pollutants using microorganisms instead of chemicals. Specific examples of such biological treatment methods include biofilters, biotrickling filters, or bioscrubbers.

The biofilter is mainly suitable for the case of low solubility of contaminants, and has the advantage of a very simple process and low installation and operation costs. However, it is difficult to control the process such as additional supply of pH, temperature, moisture, and nutrients for proper growth of microorganisms, and during the long-term operation, carriers need to be exchanged due to shrinkage of carriers or depletion of nutrients.

The biotrickle filter is operated while supplying a solution containing nitrogen, phosphorus, inorganic salts, etc. necessary for biofilm formation, and can effectively respond to microbial shock due to a temporary increase in concentration according to the performance of the carrier, pH, temperature, There is an advantage that it is easy to control moisture.

The bioscrubber has the advantage of physically separating the contaminants and then independently operating the activated sludge for biological treatment, thereby optimizing the process. However, most volatile organic compounds and sulfur compounds have a low solubility, so that the contact area is large, and the scrubbing portion has a relatively large size, and thus requires a large area for the site.

In order to maximize the performance of the reactors using the biological method described above, not only the reactor design but also the selection of the fillers in the reactor are important. That is, since the filler is a carrier that immobilizes the microorganisms so that the microorganisms can adhere and grow, the size of the reactor, the water content in the reactor, and the absorption and adsorption performance of the pollutant are determined according to the selection of the fillers. Is an important variable in determining this. Therefore, in order to convert the airborne harmful substances into carbon dioxide (CO ₂ ), water (H ₂ O), minerals and the like using microorganisms, there is a need for the development of a composition that has excellent adsorption performance and can increase the growth and proliferation of microorganisms. to be.

KR 10-1621098 B1 (2016. 05. 09.) KR 10-0664882 B1 (Dec. 28, 2006)

The present invention has been made in order to solve the problems of the prior art, the problem to be solved in the present invention is a harmful chemical that can be contained in the elastic floor material installed on the riverside road, children's playground, school playground, etc. As a physical biological treatment method to remove T-VOCs (benzene, toluene, ethylbenzene, xylene), which are substances, microorganisms are used to convert harmful substances into carbon dioxide (CO ₂ ), water (H ₂ O), and minerals. It is to provide a biofilter composition for making.

The method for preparing a composition for a biofilter for removing an airborne toxic compound which is an organic volatile compound according to the present invention for achieving the above object comprises a grinding step of pulverizing a porous carrier, and mixing the pulverized porous carrier and a binder solution. A binder solution mixing step, a heat treatment step of heat-treating the porous carrier mixed with the binder solution, a microorganism input step of introducing a microorganism into the heat-treated porous carrier and a growth promoter adsorbing a growth promoter to the porous carrier into which the microorganism is added Characterized in that it comprises a step.

In addition, the crushing step is characterized in that the porous carrier mixed with one or more selected from illite, chorionic mica, germanium, noble stone, peat, activated carbon to a particle size of 5 ~ 30㎛ size.

In addition, the microorganism injecting step is added to 2-3 parts by weight of the microorganism in 100 parts by weight of the heat-treated porous carrier, the microorganism is Bacillus (Bacillus), Pseudomonas (Pseudomonas), Nitrobacter, Nitrozomonas (Nitrosomonas ), Nitrosococcus, Nitrosococcus, Alcaligenes, Thiobacillus (Thiobacillus) is characterized by inoculating a mixed microorganism.

In addition, the growth promoter adsorption step is to adsorb 5 to 15 parts by weight of the growth promoter to 100 parts by weight of the porous carrier in which the microorganism is added, the growth promoter is potassium phosphate (KH ₂ PO ₄ ), the second potassium phosphate (K ₂ HPO ₄ ), ammonium chloride (NH ₄ Cl), magnesium chloride (MgCl ₂ ), sodium chloride (NaCl), calcium chloride (CaCl ₂ ), potassium chloride (KCl), lithium chloride (LiCl), zinc chloride (ZnCl), iron sulfate (FeSO ₄ ), at least one inorganic salt mixture selected from ammonium sulfate ((NH ₄ ) ₂ SO ₄ ), magnesium sulfate (MgSO ₄ ) and manganese chloride (MnCl ₂ ) is characterized in that the inorganic salt solution dissolved in a solvent.

In addition, after the growth promoter adsorption step, it is characterized in that the addition of 2 to 5 parts by weight of the natural vegetable oil to 100 parts by weight of the porous carrier adsorbed by the growth promoter.

Bio-filter composition for removing the airborne harmful substances of the organic volatile compounds according to the present invention T-VOCs that are harmful chemical substances that can be included in the elastic floor material installed in the riverside bicycle road, children's playground, school playground, etc. (Benzene, toluene, ethylbenzene, xylene) has the effect of easily converting carbon dioxide (CO ₂ ), water (H ₂ O), minerals and the like using microorganisms.

FIG. 1 is a schematic flowchart illustrating a method for preparing a composition for a biofilter for removing an airborne toxic compound, which is an organic volatile compound.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic flowchart illustrating a method for preparing a composition for a biofilter for removing an airborne toxic compound, which is an organic volatile compound.

Referring to FIG. 1, the method for preparing a composition for a biofilter for removing an air toxic compound that is an organic volatile compound according to the present invention includes a grinding step (S10), a binder solution mixing step (S20), a heat treatment step (S30), It comprises a microbial input step (S40) and growth promoter adsorption step (S50).

1. Crushing step (S10)

Grinding step (S10) is a step of grinding the porous mixture.

More specifically, the porous mixture in which at least one selected from illite, chorionic feldspar, germanium, guinea pig, peat, and activated carbon is pulverized to a particle size of 5 to 30 μm.

The porous mixture is a material having a large specific surface area to which microorganisms can be attached and grow smoothly, thereby removing odorous substances and organic volatile compounds through the microorganisms.

In addition, the porous carrier mixed with at least one selected from illite, chorionic feldspar, germanium, noble stone, peat, and activated carbon is rich in nutrients of microorganisms and has an appropriate moisture content, air permeability, anion releasing function, and antibacterial properties. Formaldehyde, organic volatile compounds, carbon monoxide and ammonia may all be removed when reacting with a mixed gas containing an organic volatile compound.

The porous mixture should have a sufficient specific surface area that can survive microorganisms attached, it is preferable to use a crushed to a particle size of 5 ~ 30㎛ size in order to react smoothly with odorous substances and organic volatile compounds.

The porosity of the porous carrier ground to a particle size of 5 ~ 30㎛ size is 50 ~ 60%.

If the particle size of the porous mixture is pulverized to less than 5 μm or pulverized to exceed 30 μm, not only the moldability of the porous mixture is lowered, but also the porosity is too low or too high for microorganisms to adhere and survive. As a result, the competitiveness becomes inferior.

2. Binder solution mixing step (S20)

The binder solution mixing step (S20) is a step of mixing the ground porous mixture and the binder solution.

In more detail, the ground porous mixture and the binder solution are mixed at a ratio of 1: 0.5 to 3 by weight.

Here, the binder solution is 100 parts by weight of at least one binder selected from polyurethane, polyvinyl alcohol, polyethylene glycol, polyacrylic acid, polymethyl methacrylate, and hydroxypropyl methyl cellulose, diluent 300 to 700 parts by weight, dispersion It mixes 1-2 weight part.

Here, the diluent may be water, an organic solvent or a mixed solvent thereof, preferably using a mixed solvent in which 20 to 40 parts by weight of alcohol is mixed with 100 parts by weight of water. To increase the wettability of the mixture.

3. Heat treatment step (S30)

The heat treatment step (S30) is a step of heat treating the porous mixture in which the binder solution is mixed.

More specifically, the porous mixture in which the binder solution is mixed is heated at a temperature of 300 to 500 ° C. for 3 to 7 hours.

The heating of the porous mixture mixed with the binder solution at a temperature of 300 to 500 ° C. for 3 to 7 hours is to increase the bonding strength of the mixture and to control the degree of dispersion and to form a molded body.

When the porous mixture mixed with the binder solution is heated at a temperature of less than 300 ° C., the bonding strength between the porous mixture mixed with the binder solution may be reduced, and the characteristics of the porosity when heated at a temperature exceeding 500 ° C. This can be degraded.

In addition, when the porous mixture in which the binder solution is mixed is heated at a temperature of 300 to 500 ° C. for less than 3 hours, the bonding strength between the porous mixture in which the binder solution is mixed may decrease, and the heating may be performed at a temperature exceeding 7 hours. In this case, the porosity may be degraded.

Here, the porous mixture in which the binder solution is mixed is heated at a temperature of 300 to 500 ° C. for 3 to 7 hours is called a porous carrier.

4. Microorganism input step (S40)

Microorganism input step (S40) is a step of injecting microorganisms to the heat-treated porous carrier.

More specifically, 2 to 3 parts by weight of microorganisms are added to 100 parts by weight of the heat-treated porous carrier.

Here, the microorganism is Bacillus, Pseudomonas, Pseudomonas, Nitrobacter, Nitrosomonas, Nitrosococcus, Alkalogenes, Alcaligenes, Thiobacillus selected from 1 Microorganisms mixed with more than one species are introduced.

The microorganism is a bacterium that converts atmospheric harmful substances such as volatile organic compounds (VOCs) into carbon dioxide (CO ₂ ), water (H ₂ O), minerals, and the like. Among microorganisms separated from insoluble wastewater sludge, microorganisms with high degradation activity are selected and used.

And, 2 to 3 parts by weight of the microorganism is added to 100 parts by weight of the heat-treated porous carrier is a microorganism is added to the heat-treated porous carrier to facilitate the decomposition activity heavy metals, polynuclear aromatic hydrocarbons and organic volatile compounds airborne harmful substances This is to activate and remove various contaminant degrading bacteria upon reaction with the porous carrier.

If less than 2 parts by weight of the microorganism is added to 100 parts by weight of the heat-treated porous carrier, the degradation activity of the microorganism may not proceed sufficiently, and if more than 3 parts by weight is added, the degradation activity of the microorganism is further increased. It is not economical.

5. Growth promoter adsorption step (S50)

The growth promoter adsorption step (S50) is a step of adsorbing the growth promoter to the porous carrier into which the microorganism is added.

More specifically, 5 to 15 parts by weight of the growth promoter is adsorbed to 100 parts by weight of the porous carrier into which the microorganism is added.

If the growth promoter is adsorbed to less than 5 parts by weight to 100 parts by weight of the porous carrier into which the microorganism is added, the microorganisms provided in the porous carrier into which the microorganism is added may not be able to facilitate growth and proliferation. When adsorbed by the microorganisms, the microorganism is excessively multiplied, and the microcavity of the porous carrier can be blocked by the by-products generated by the decomposition reaction of the microorganisms.

Here, the growth promoter is to supply inorganic nutrients necessary for the growth and growth of microorganisms, potassium phosphate (KH ₂ PO ₄ ), dibasic potassium phosphate (K ₂ HPO ₄ ), ammonium chloride (NH ₄ Cl), chloride Magnesium (MgCl ₂ ), Sodium Chloride (NaCl), Calcium Chloride (CaCl ₂ ), Potassium Chloride (KCl), Lithium Chloride (LiCl), Zinc Chloride (ZnCl), Iron Sulfate (FeSO ₄ ), Ammonium Sulfate ((NH ₄ ) ₂ SO ₄ ), an inorganic salt solution in which at least one inorganic salt mixture selected from magnesium sulfate (MgSO ₄ ) and manganese chloride (MnCl ₂ ) is dissolved in a solvent.

After the growth accelerator adsorption step (S50), 2 to 5 parts by weight of the natural vegetable oil may be further added to 100 parts by weight of the porous carrier adsorbed by the growth promoter.

By adding 2-5 parts by weight of natural vegetable oil to 100 parts by weight of the porous carrier adsorbed by the growth promoter, the eco-friendly natural vegetable oil is included as a main component. It can prevent causing the environmental pollution.

If the natural plant oil is added to less than 2 parts by weight to 100 parts by weight of the growth promoter-adsorbed porous carrier, the natural plant oil may not be evenly mixed with the growth promoter-adsorbed porous carrier. When added in excess of 5 parts by weight, there is a possibility that the organic volatile compounds, which are no more organic volatile compounds, are not removed and the safety is lowered.

Here, the natural vegetable oil is 3 to 5 parts by weight of essential oils prepared by mixing one or two or more of tea tree, lime, citron seed with respect to 100 parts by weight of water or organic solvent, 3 to 5 parts by weight of nonionic emulsifier Part, 1 to 2 parts by weight of the organic amine was mixed and stirred at a speed of 500 to 1,000 rpm in a stirrer, and then prepared by aging for 3 to 5 hours at a temperature of 15 to 20 ℃.

The essential oil is mixed with 300 to 500 parts by weight of water to 100 parts by weight of a mixture of one or two or more of tea tree, lime, citron seed, extracted for 3 to 5 hours in an autoclave at a temperature of 100 ~ 120 ℃ and filtered Use concentrated concentrate.

The nonionic emulsifier is a reaction product of natural or hydrogenated vegetable oil with ethylene glycol.

The biofilter composition for removing airborne harmful substances, which are organic volatile compounds prepared by the above method, is a harmful chemical substance that may be contained in an elastic floor material installed in a bicycle road, a children's playground, a school playground, etc. -VOCs (benzene, toluene, ethylbenzene, xylene) are easily converted into carbon dioxide (CO ₂ ), water (H ₂ O), minerals, etc. by microorganisms.

In addition, microorganisms can be attached and grown smoothly using porous materials with a large specific surface area, and odorants and organic volatility through growth promoting agents and active decomposition of microorganisms to supply inorganic nutrients necessary for the growth and proliferation of microorganisms. There is an effect that the compound can be removed more efficiently.

Hereinafter, the present invention will be described in more detail with reference to Examples. However, the following examples are only intended to specifically illustrate the present invention, it is obvious to those skilled in the art that does not limit the scope of the present invention. That is, simple modifications or changes of the present invention can be easily carried out by those skilled in the art, and all such modifications or changes can be seen to be included in the scope of the present invention.

Example 1 Biofilter Compositions Prepared According to the Present Invention

1) Grind a porous mixture of illite, mica, germanium, noble stone, peat, and activated carbon to a particle size of 10㎛.

2) Mix 100 g of the ground porous mixture of 1) and 100 g of binder solution.

3) The porous mixture in which the binder solution of 2) is mixed is heated at a temperature of 500 ° C. for 5 hours.

4) 2 g of microorganisms are added to 100 g of the heat-treated porous carrier of 3) (the microorganism is mixed with Bacillus, Pseudomonas, Nitrobacter, and Nitrosomonas).

5) Adsorb 10 g of growth promoter to 100 g of the porous carrier into which the microorganism of 4) was introduced (the growth promoter is potassium phosphate (KH ₂ PO ₄ ), dibasic potassium phosphate (K ₂ HPO ₄ ), ammonium chloride (NH ₄ Cl), Magnesium chloride (MgCl ₂ ), sodium chloride (NaCl), calcium chloride (CaCl ₂ ), potassium chloride (KCl), lithium chloride (LiCl), zinc chloride (ZnCl), iron sulfate (FeSO ₄ ), ammonium sulfate ((NH ₄ ) ₂ SO ₄ ), an inorganic salt mixture of magnesium sulfate (MgSO ₄ ) and manganese chloride (MnCl ₂ ) in a solvent.

Example 2 biofilter composition prepared according to the present invention (natural vegetable oil added)

1) Grind a porous mixture of illite, mica, germanium, noble stone, peat, and activated carbon to a particle size of 10㎛.

2) Mix 100 g of the ground porous mixture of 1) and 100 g of binder solution.

3) The porous mixture in which the binder solution of 2) is mixed is heated at a temperature of 500 ° C. for 5 hours.

4) 2 g of microorganisms are added to 100 g of the heat-treated porous carrier of 3) (the microorganism is mixed with Bacillus, Pseudomonas, Nitrobacter, and Nitrosomonas).

5) Adsorb 10 g of growth promoter to 100 g of the porous carrier into which the microorganism of 4) was introduced (the growth promoter is potassium phosphate (KH ₂ PO ₄ ), dibasic potassium phosphate (K ₂ HPO ₄ ), ammonium chloride (NH ₄ Cl), Magnesium chloride (MgCl ₂ ), sodium chloride (NaCl), calcium chloride (CaCl ₂ ), potassium chloride (KCl), lithium chloride (LiCl), zinc chloride (ZnCl), iron sulfate (FeSO ₄ ), ammonium sulfate ((NH ₄ ) ₂ SO ₄ ), an inorganic salt mixture of magnesium sulfate (MgSO ₄ ) and manganese chloride (MnCl ₂ ) in a solvent.

6) Add 3 g of natural vegetable oil to 100 g of the porous carrier added with 5) growth promoter (10 g of essential oil prepared by mixing tea tree, lime, and citron seed, 10 g of nonionic emulsifier, and 5 g of organic amine). After stirring at a speed of 700rpm in a stirrer, and aged at a temperature of 20 ℃ for 5 hours).

Experiment: Deodorization Performance

The deodorizing performance of harmful and odorous gases was tested. Deodorization rate was carried out according to the detection tube method (KS M 0062: 2003), 1 g of the composition for biofilters prepared according to the present invention (Example 1, Example 2) in each 10L deodorization vessel was added after 1 hour to deodorization rate Confirmed.

Deodorization rate (%) ammonia Hydrogen sulfide Formaldehyde Example 1 87 89 82 Example 2 88 92 83

As can be seen in Table 1, it was confirmed that the biofilter composition prepared according to the present invention exhibited excellent performance against harmful and odorous gases.

Claims (5)

Grinding step (S10) of grinding the porous carrier mixed with at least one selected from illite, mica, germanium, precious stone, peat, activated carbon to a particle size of 5 ~ 30㎛;
A binder solution mixing step (S20) of mixing the pulverized porous carrier and the binder solution;
A heat treatment step (S30) of heat treating the porous carrier mixed with the binder solution at a temperature of 500 ° C. for 3 to 7 hours;
A microorganism input step of injecting microorganisms into the heat-treated porous carrier (S40); And
Growth promoter adsorption step (S50) of adsorbing the growth promoter to the porous carrier into which the microorganism is introduced;
Including,
The binder solution mixing step (S20),
Mixing the ground porous mixture and the binder solution in a ratio of 1: 0.5 to 3 by weight,
The binder solution is 100 parts by weight of one or more binders selected from polyurethane, polyvinyl alcohol, polyethylene glycol, polyacrylic acid, polymethyl methacrylate, and hydroxypropyl methyl cellulose, diluent 300 to 700 parts by weight, and dispersion 1 to 1 part. 2 parts by weight is mixed,
The microorganism input step (S40),
To 2 to 3 parts by weight of microorganisms in 100 parts by weight of the heat-treated porous carrier,
The microorganism is at least one selected from Bacillus, Pseudomonas, Nitrobacter, Nitrosomonas, Nitrosococcus, Alcaligenes, and Thiobacillus. To inoculate this mixed microorganism,
The growth promoter adsorption step (S50),
While adsorbing 5 to 15 parts by weight of growth promoter to 100 parts by weight of the porous carrier in which the microorganism is added,
The growth promoter is potassium phosphate (KH ₂ PO ₄ ), dibasic potassium phosphate (K ₂ HPO ₄ ), ammonium chloride (NH ₄ Cl), magnesium chloride (MgCl ₂ ), sodium chloride (NaCl), calcium chloride (CaCl ₂ ), In potassium chloride (KCl), lithium chloride (LiCl), zinc chloride (ZnCl), iron sulfate (FeSO ₄ ), ammonium sulfate ((NH ₄ ) ₂ SO ₄ ), magnesium sulfate (MgSO ₄ ) and manganese chloride (MnCl ₂ ) Inorganic salt solution in which at least one selected inorganic salt mixture is dissolved in a solvent,
After the growth promoter adsorption step (S50),
2 to 5 parts by weight of the natural vegetable oil is further added to 100 parts by weight of the porous carrier adsorbed by the growth promoter,
The natural vegetable oil is 3 to 5 parts by weight of essential oils prepared by mixing one or two or more of tea tree, lime, and citron seed with respect to 100 parts by weight of water or an organic solvent, 3 to 5 parts by weight of a nonionic emulsifier, After mixing 1 to 2 parts by weight of the organic amine and stirring at a speed of 500 ~ 1,000rpm in a stirrer, the air toxic compounds of the organic volatile compounds, characterized in that prepared by aging for 3 to 5 hours at a temperature of 15 ~ 20 ℃ Method for producing a composition for biofilter for removal. delete delete delete delete

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