KR102016146B1 - The manufacturing method of composition for bio filter for improving air pollution by removing odour and organic volatile compounds - Google Patents

Abstract

The present invention relates to a method for preparing a bio-filter composition for relieving air pollution by removing odor and organic volatile compounds, which comprises: a grinding step of grinding a porous carrier; a binder solution mixing step of mixing the grinded 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 into the thermally treated porous carrier; and a growth promotor adsorption step of absorbing a growth promotor to the porous carrier input with the microorganisms. The bio-filter composition of the present invention has an effect of relieving air pollution by easily converting T-VOCs (benzene, toluene, ethylbenzene, and xylene), which are odor and harmful chemical substances which can be discharged by being included in an elastic floor material installed in a bicycle road of a river side, a child playground, a school playground, etc. into carbon dioxide (CO_2), water (H_2O), minerals, etc. by using microorganisms.

Description

The manufacturing method of composition for bio filter for improving air pollution by removing odour and organic volatile compounds}

The present invention provides a method for preparing a composition for a biofilter for improving air pollution by removing odors and organic volatile compounds, 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 A microorganism is used, including a heat treatment step of heat-treating a porous carrier mixed with a binder 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 introduced. It relates to the harmful substances carbon dioxide (CO _2), water and composition to malodor production method for a biofilter for the improvement of air quality by removing volatile organic compounds such as, for converting (H ₂ O), minerals.

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 harmful or odorous substances are being strengthened, and deodorants and deodorants that can effectively control or remove odorous substances and toxic substances are accompanied. The development of equipment has been urgently required, and a lot of research has been conducted.

In recent years, as social concerns about environmental problems have increased, efforts to deal with harmful substances using microorganisms instead of chemicals have been expanded. 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 that it is easy to optimize the process because it can physically separate the contaminants and then independently operate the activated sludge for biological treatment. 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 for immobilizing the microorganisms to allow the microorganisms to 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 such fillers. Is an important variable in determining this. Therefore, in order to convert 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 having excellent adsorption performance and enhancing microbial growth and proliferation. .

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. The present invention provides a biofilter composition for improving air pollution.

The method for preparing a composition for a biofilter for improving air pollution by removing odors and organic volatile compounds according to the present invention for achieving the above object comprises a mixing step of mixing carbon, silicon carbide, and a polymeric binder, and the mixed mixture A porous ceramic carrier manufacturing step of oxidizing carbon contained in the mixture by heat treatment, a mixed microorganism injecting step of injecting a mixed microorganism into the prepared porous ceramic carrier and adding an oxygen generating agent to the porous ceramic carrier into which the mixed microorganism is added Characterized in that it comprises an additional oxygen generator.

In addition, the mixing step is to mix 30 to 50 parts by weight of silicon carbide powder having a particle size of 35 to 50 ㎛, 0.5 to 2 parts by weight of a polymeric binder with respect to 100 parts by weight of carbon powder having a particle size of 10 ~ 30㎛ It features.

In the preparing of the porous ceramic carrier, the mixed mixture is heat-treated at a temperature of 700 to 1200 ° C. for 30 to 45 hours to oxidize carbon contained in the mixture to prepare a porous ceramic carrier.

In addition, the mixed microorganism input step, the mixed microorganisms 2 to 3 parts by weight to 100 parts by weight of the prepared porous ceramic carrier, the mixed microorganisms are Bacillus (Bacillus), Pseudomonas (Pseudomonas), Nitrobacter (Nitrobacter), Nitrozomonas (Nitrosomonas), Nitrosococcus (Nitrosococcus), Alkali geneses (Alcaligenes), Thiobacillus (Thiobacillus) It is characterized in that at least one selected.

In addition, the oxygen generator addition step, 5 to 15 parts by weight of the oxygen generating agent is added to 100 parts by weight of the porous ceramic carrier in which the mixed microorganism is added, the oxygen generating agent in the form of liquid H ₂ O ₂ , granules or powder MGO ₂ , KMnO _{4 It} is characterized in that at least one member selected from the group consisting of.

Bio-filter composition for removing odor and organic volatile compounds prepared according to the present invention is a odor and harmful chemicals that can be leaked contained in the elastic floor material installed in the riverside bicycle road, children's playground, school playground, etc. -VOCs (benzene, toluene, ethylbenzene, xylene) are easily converted to carbon dioxide (CO ₂ ), water (H ₂ O), minerals, etc. using microorganisms to improve air pollution.

1 is a schematic flowchart illustrating a method for preparing a composition for a biofilter for improving air pollution by removing odors and organic volatile compounds.

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

1 is a schematic flowchart illustrating a method for preparing a composition for a biofilter for improving air pollution by removing odors and odors and organic volatile compounds.

Referring to FIG. 1, the method for preparing a composition for a biofilter for improving air pollution by removing odors and organic volatile compounds according to the present invention includes a mixing step (S10), a porous ceramic carrier manufacturing step (S20), and a mixed microorganism input step. (S30) and the oxygen generator additional step (S40) is made.

1. Mixing step (S10)

Mixing step (S10) is a step of mixing carbon, silicon carbide, polymer binder.

More specifically, 30 to 50 parts by weight of the silicon carbide powder having a particle size of 35 to 50 µm and 0.5 to 2 parts by weight of the polymer binder are mixed with 100 parts by weight of the carbon powder having a particle size of 10 to 30 µm.

Mixing 30 to 50 parts by weight of the silicon carbide powder having a particle size of 35 to 50 μm and 0.5 to 2 parts by weight of the polymer binder with respect to 100 parts by weight of the carbon powder having a particle size of 10 to 30 μm is heat-treated according to the following steps. The pores are formed by oxidizing carbon, so that the microparticles can be attached smoothly to have a porous structure with a particle size of 20 to 30 μm and a porosity of 50 to 60%.

If the particle size of the carbon powder and silicon carbide powder is out of the above range, it may be difficult to derive the expected particle size and porosity when carbon is oxidized after the heat treatment process to form pores.

In addition, the polymer binder is a mixture of one or more selected from polyurethane, polyvinyl alcohol, polyethylene glycol, polyacrylic acid, polymethyl methacrylate, and hydroxypropyl methyl cellulose.

Further, 20 to 30 parts by weight of ocher powder having a particle size of 1 to 5 mm and 10 to 20 parts by weight of expanded clay powder having a particle size of 3 to 10 mm are further mixed with 100 parts by weight of carbon powder having a particle size of 10 to 30 μm. can do.

The ocher powder and expanded clay powder contains minerals to help the growth of microorganisms, and excellent moisture and breathability. In addition, the ocher powder and expanded clay powder has a viscosity through the following heat treatment process can further increase the bonding strength.

2. Porous ceramic carrier manufacturing step (S20)

Porous ceramic carrier manufacturing step (S20) is a step of oxidizing the carbon contained in the mixture by heat treatment of the mixed mixture.

More specifically, the mixed mixture is heat-treated for 30 to 45 hours at a temperature of 700 ~ 1,200 ℃ to oxidize the carbon contained in the mixture to prepare a porous ceramic carrier.

The mixed mixture is heat-treated at a temperature of 700 to 1,200 ° C. for 30 to 45 hours to oxidize the carbon contained in the mixture to prepare a porous ceramic carrier, which is due to the temperature and heating time in the above range. As it is oxidized and released in the form of CO ₂ gas, pores are formed in the structure from which carbon is released.

The polymer binder contained in the mixture was removed by vaporization during the high temperature heat treatment.

If the mixed mixture is heat treated at a temperature of less than 700 ° C., the carbon contained in the mixture may not be sufficiently oxidized. If the mixed mixture is heat treated at a temperature exceeding 1,200 ° C., the amount of oxidation of carbon contained in the mixture may be reduced. It is not economical anymore because it is no longer increased.

When the mixed mixture is heat treated at a temperature of 700 to 1,200 ° C. for less than 30 hours, the carbon contained in the mixture may not be sufficiently oxidized, and cracks may be formed in the sintered body without pores. In this case, the amount of oxidation of carbon contained in the mixture is no longer increased, which is uneconomical.

The porous ceramic carrier has a large specific surface area and thus microorganisms can be attached and grown smoothly, thereby removing odorous substances and organic volatile compounds.

3. Mixed microorganism input step (S30)

Mixed microbial input step (S30) is a step of adding a mixed microorganism to the prepared porous ceramic carrier.

More specifically, 2 to 3 parts by weight of mixed microorganisms are added to 100 parts by weight of the prepared porous ceramic carrier.

The mixed microorganism is one selected from Bacillus, Pseudomonas, Nitrobacter, Nitrosomonas, Nitrosococcus, Alcaligenes and Thiobacillus. The above is mixed.

The microorganism is a bacterium that converts 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 wastewater sludge, microorganisms with high degradation activity are selected and used.

In addition, 2 to 3 parts by weight of mixed microorganisms are added to 100 parts by weight of the prepared porous ceramic carrier, and microorganisms are added to the prepared porous ceramic support to facilitate the decomposition activity, and are heavy metals, polynuclear aromatic hydrocarbons, and organic volatile compounds. This is to remove various contaminants by activating the decomposing bacteria when reacting with the harmful substances and adsorbing them on the porous carrier.

If the mixed microorganism is added to less than 2 parts by weight to 100 parts by weight of the prepared porous ceramic carrier, the degradation activity of the microorganisms may not proceed sufficiently. Is no longer increased, making it uneconomical.

4. Oxygen generator additional step (S40)

Oxygen generator addition step (S40) is a step of adding an oxygen generator to the porous ceramic carrier in which the mixed microorganism is added.

More specifically, 5 to 15 parts by weight of an oxygen generator is added to 100 parts by weight of the porous ceramic carrier into which the mixed microorganisms are added.

Here, the oxygen generator is one or more selected from the group consisting of liquid H ₂ O ₂ , granules or powder form MGO ₂ , KMnO ₄ .

The amount of oxygen generator added may be increased or decreased depending on the contact area of the porous ceramic carrier.

In addition, when less than 5 parts by weight of the oxygen generator is added to 100 parts by weight of the porous ceramic carrier in which the mixed microorganisms are added, oxygen generation may be insufficient to hinder the growth of the microorganisms. Will fall.

After the oxygen generator addition step (S40), 2 to 5 parts by weight of the natural vegetable oil may be further added to 100 parts by weight of the porous ceramic carrier to which the oxygen generator is added.

By adding 2-5 parts by weight of natural vegetable oil to 100 parts by weight of the porous ceramic carrier to which the oxygen generator is added, when eco-friendly natural vegetable oil is included as a main component, the harmful substances as organic volatile compounds are more reliably removed. At the same time, it can prevent secondary environmental pollution.

If the natural vegetable oil is added to less than 2 parts by weight to 100 parts by weight of the porous ceramic carrier to which the oxygen generator is added, the natural vegetable oil may not be evenly mixed with the porous ceramic carrier to which the oxygen generator is added. If the amount is added in an amount exceeding 5 parts by weight, the organic volatile compound may not only remove harmful substances, but also may deteriorate safety.

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 prepared by the above method is T-VOCs (benzene, toluene, ethylbenzene, which are odors and harmful chemicals that may be leaked by being included in the elastic flooring material installed on a riverside road, children's playground, school playground, etc.). , Xylene) is easily converted to carbon dioxide (CO ₂ ), water (H ₂ O), minerals and the like using microorganisms to improve air pollution.

In addition, by using a porous material having a large specific surface area, microorganisms can be attached and grow smoothly, and growth accelerators for supplying inorganic nutrients necessary for the growth and proliferation of microorganisms and active decomposition of microorganisms can be used to remove odors and organic volatile compounds. There is an effect that 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) 100 g of carbon powder having a particle size of 20 μm, 50 g of silicon carbide powder having a particle size of 50 μm, and 2 g of a polymeric binder are mixed.

2) The mixed mixture of 1) is heat treated at a temperature of 800 ° C. for 40 hours to oxidize the carbon contained in the mixture to prepare a porous ceramic carrier.

3) 1 g of mixed microorganism is added to 50 g of the porous ceramic carrier of 2) (mixed microorganism is used by mixing Bacillus, Pseudomonas, Nitrobacter, and Nitrosomonas).

4) Add 3 g of an oxygen generating agent to 50 g of the porous ceramic carrier in which the mixed microorganisms of 3) are added (oxygen generating agent is liquid H ₂ O ₂ , granular or powdered MGO ₂ , KMnO ₄ Consisting of)

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

1) 100 g of carbon powder having a particle size of 20 μm, 50 g of silicon carbide powder having a particle size of 50 μm, and 2 g of a polymeric binder are mixed.

2) The mixed mixture of 1) is heat treated at a temperature of 800 ° C. for 40 hours to oxidize the carbon contained in the mixture to prepare a porous ceramic carrier.

3) 1 g of mixed microorganism is added to 50 g of the porous ceramic carrier of 2) (mixed microorganism is used by mixing Bacillus, Pseudomonas, Nitrobacter, and Nitrosomonas).

4) Add 3 g of an oxygen generator to 50 g of the porous ceramic carrier in which the mixed microorganisms are introduced (3) (oxygen generator is liquid H ₂ O ₂ , granular or powdered MGO ₂ , KMnO _4). Consisting of)

5) Add 1 g of natural vegetable oil to 50 g of the porous ceramic carrier to which the oxygen generator of 4) is added (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, it is prepared by aging for 5 hours at a temperature of 20 ℃).

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 86 91 80 Example 2 88 92 82

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)

Mixing step of mixing carbon, silicon carbide, and a polymeric binder (S10);
Heat-treating the mixed mixture to prepare a porous ceramic carrier for oxidizing carbon contained in the mixture (S20);
A mixed microorganism input step (S30) of introducing a mixed microorganism into the prepared porous ceramic carrier; And
Adding an oxygen generator to the porous ceramic carrier into which the mixed microorganism is added (S40);
Bio-filter composition manufacturing method for improving air pollution by removing odor and organic volatile compounds, characterized in that it comprises a.
The method of claim 1,
The mixing step (S10),
With respect to 100 parts by weight of the carbon powder having a particle size of 10 ~ 30㎛,
30-50 parts by weight of silicon carbide powder having a particle size of 35-50 μm,
Method for producing a composition for a bio-filter for improving air pollution by removing odor and organic volatile compounds, characterized in that 0.5 to 2 parts by weight of a polymer binder is mixed.
The method of claim 1,
The porous ceramic carrier manufacturing step (S20),
The mixed mixture is heat-treated at a temperature of 700 to 1,200 ° C. for 30 to 45 hours to oxidize the carbon contained in the mixture to prepare a porous ceramic carrier, thereby removing odors and organic volatile compounds. Biofilter composition production method.
The method of claim 1,
The mixed microorganism input step (S30),
To 2 to 3 parts by weight of mixed microorganisms in 100 parts by weight of the prepared porous ceramic carrier,
The mixed microorganism is one selected from Bacillus, Pseudomonas, Nitrobacter, Nitrosomonas, Nitrosococcus, Alcaligenes and Thiobacillus. Method for producing a composition for a bio-filter for improving air pollution by removing the odor and organic volatile compounds, characterized in that the above mixture.
The method of claim 1,
The oxygen generator addition step (S40),
5 to 15 parts by weight of an oxygen generating agent is added to 100 parts by weight of the porous ceramic carrier into which the mixed microorganism is added,
The oxygen generator,
Method for producing a composition for a bio-filter for improving air pollution by removing odor and organic volatile compounds, characterized in that at least one selected from the group consisting of liquid H ₂ O ₂ , granules or powder form MgO ₂ , KMnO ₄ .

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