KR100971512B1 - Biofilter, apparatus and method for removing harmful material using the same - Google Patents

Abstract

PURPOSE: A biofilter, a harmful material removing device using the same, and a removal method thereof are provided to minimize the removing device by installing a multistep biofilter in one facility, and to reduce installation costs of the filter. CONSTITUTION: A harmful material removing device includes the following: a cleaning water freshwater part(3) which stores the cleaning water to transfer a material to be processed; a first biofilter(10) which has hydrophilic property eliminating solubility harmful components; a second bilfilter(20) which has hydrophobicity eliminating the insolubility harmful component; and a third biofilter(30) sterilizing and removing harmful materials and moisture.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a biofilter, a device for removing harmful substances using the biofilter,

TECHNICAL FIELD The present invention relates to a biofilter, an apparatus for removing harmful substances using the same and a method for removing harmful substances, and more particularly, to an apparatus and a method for removing harmful substances such as odorous substances and volatile organic substances by arranging biofilters in multi- will be.

Hazardous materials that adversely affect human health or the environment are mostly wastewater treatment facilities, manure treatment facilities, food waste treatment facilities, food processing plants, composting plants, petrochemical plants, tire plants, paint manufacturing plants, Site and environmental treatment facilities.

Common harmful substances include harmful substances such as ammonia (NH ₃ ), methyl mercaptan (MM), hydrogen sulfide (H ₂ S), methyl sulfide (DMS), methyl disulfide (DMDS), trimethyl amine (TMA), acetaldehyde, And volatile organic compounds (VOCs) which destroy the ozone layer in the atmosphere such as benzene, toluene, xylene, dichlorobenzene, and dichloromethane and which are harmful to the human body. These harmful substances are strongly regulated at the national level, and the substances to be regulated are also expanding.

Conventionally, a physicochemical method such as a wet scrubber, an activated carbon adsorption tower, and an incineration method has been mainly used as a method for removing harmful substances. However, a high operating cost, Problems such as replacement of the filler and emission of secondary pollutants occurred.

In recent years, environmentally friendly and highly efficient treatment technology has been required, and biological treatment technology using microorganisms has been developed as an alternative technology from abroad in the 2000s. However, among the biological treatment technologies, the carrier-filled type or scrubber-attached type has problems such as large volume of the reactor, frequent replacement of the carrier, excessive installation cost, and excessive microbial growth.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a nano- ≪ / RTI >

The solution to the problem of the present invention is not limited to those mentioned above, and other solutions not mentioned can be clearly understood by those skilled in the art from the following description.

The apparatus for removing harmful substances according to the present invention comprises a wash water fresh water storage part for storing wash water so that a substance to be treated can pass therethrough, a first filter part spaced apart from the wash water fresh water part, A second filter unit spaced apart from the first filter unit and passing the material to be treated to remove insoluble harmful components, a third filter unit disposed apart from the second filter unit, And a filter portion.

In addition, the biofilter assembly according to the present invention includes a filter matrix through which a substance to be treated passes, an adsorbent attached to the filter matrix, and a biofilter including a nano-metal-containing substance.

According to another aspect of the present invention, there is provided a method for removing harmful substances, comprising the steps of dissolving and absorbing a substance to be treated by washing water, passing a substance to be treated through a first filter unit to remove harmful harmful components, And passing the substance to be treated through the third filter unit to remove water and residual harmful substances.

According to the embodiments of the present invention, by using the multi-stage bio-filter, the load factor of the bio-filter can be reduced and the excessive growth of the bio-filter micro-organism can be suppressed, so that the micro-organism can efficiently remove the harmful substance.

The apparatus and method for removing harmful substances according to embodiments of the present invention can reduce the size of the removal apparatus by installing and using a multi-stage bio-filter in one facility, and reduce the cost of installation and operation.

In addition, the apparatus and method for removing harmful substances according to embodiments of the present invention can increase the adsorption power and increase the removal efficiency and sterilization ability of harmful substances by attaching the nanomaterial to the adsorbent of the biofilter.

Hereinafter, an apparatus for removing harmful substances according to the present invention will be described in detail with reference to the drawings.

1 is a schematic view of an apparatus for removing harmful substances according to the present invention. The arrows a, b, c, d, e, and f shown in FIG. 1 represent the flow of the material to be treated. 3 to 6 are perspective views showing the biofilter and the bio carrier of each step.

1, the apparatus for removing toxic substances according to the present invention includes a wash water fresh water portion 3, a first filter portion 10 (10a, 10b), a second filter portion 20, a third filter portion 30 ).

As shown in FIG. 1, the first to third filter units 10, 20, and 30 may be spaced apart from each other within a single housing 2. When the respective filter units are integrally installed in one housing 2, the apparatus for removing harmful substances is made compact, so that space utilization is facilitated.

The harmful substance removing device may include a wash water storage tank 50 for storing the wash water circulating through the wash water fresh water portion 3, the first filter portion 10, and the second filter portion 20. The wash water storage tank 50 is connected to the housing 2 provided with the wash water fresh water portion 3 and the filter portions and the transfer pipes 53a, 53b and 53c. The washing water is supplied into the housing through the transfer pipes 53b and 53c and passes through the second filter unit 20, the first filter unit 10 and the washing water fresh water receiving unit 3 again through the transfer pipe 53a, (50).

The circulating amount of the washing water is preferably controlled by a level switch 51 attached to the washing water storage tank 50 and a washing water inflow control valve 52 connected thereto. The level switch 51 attached to the wash water storage tank 50 senses the amount of wash water remaining in the wash water storage tank 50 to determine the wash water circulation amount and the level switch 51 controls the wash water inflow control valve 52, Into the wash water storage tank (50).

When the equipment for removing harmful substances is operated for a long time and the washing water circulates for a considerable period of time, the pH is changed to acidic due to decomposition products of harmful substances and the pH is lowered to 3 or less. In this case, the pH is sensed by a pH meter (not shown) attached to the inside of the wash water storage tank 50 to adjust the pH of the wash water in the wash water storage tank from 7 to 8 .

The material to be treated containing harmful substances is introduced through the inflow pipe 4 (a path) as shown in FIG. 1 and mixed with the outside air flowing from the outside air inflow part 5, And then flows into the housing 2. A blower 72 is disposed in the exhaust pipe 71 through which the material to be treated is discharged so that the material to be introduced into the housing flows toward the discharge pipe 71 by the blower 72. At this time, And the harmful substances are removed through each filter unit.

The washing water fresh water portion 3 is disposed at one side of the housing 2 and is provided with washing water 40 for absorbing soluble harmful components contained in the material to be treated which flows into the housing 2 of the harmful material removing apparatus 2, . Thus, the harmful harmful components existing in the material to be treated are primarily absorbed by the washing water 40 and removed.

The material to be treated is transferred to the first filter unit 10 separated from the wash water fresh water unit 3 (b path) and passes through the first filter unit 10.

As shown in FIG. 1, the first filter unit 10 includes a first bio-filter 10a and a second bio-filter 10b. The first bio-filter 10a and the second bio- And a bio carrier 10b. The first biofilter 10a and the bio carrier 10b are preferably spaced apart from each other at a predetermined interval for smooth flow of the material to be treated and the washing water.

The harmful harmful substances that have not been removed by the washing water 40 are adsorbed on the first biofilter 10a or adsorbed on the biocarrier 10b which is spaced apart. Soluble harmful substances adsorbed on the first biofilter 10a or the first biofilter 10b are decomposed by microorganisms present in the first biofilter or the bio carrier.

The first bio-filter 10a is a filter for adsorbing harmful harmful components and decomposing them into microorganisms. The first bio-filter 10a is composed of a filter matrix having a small air resistance and a porous structure, an adsorbent having excellent adsorption properties attached to the matrix, And may further comprise a hydrophilic adsorbent.

The filter matrix of the first biofilter 10a may be a porous matrix layer including one or more porous materials such as polypropylene, polyethylene, polyvinyl chloride (PVC) .

The adsorbent used in the first biofilter adsorbs harmful substances and fixes them on a filter matrix so that microorganisms can decompose harmful substances. As the adsorbent, wood activated carbon including bamboo activated carbon, pine activated carbon, oak activated carbon, spruce activated carbon, coconut activated carbon, acacia seed activated carbon, and peach seed activated carbon may be used. The wood activated carbon preferably has a specific surface area of 800 m ² / g or more and a particle size of 100 mesh or less.

The nano-metal-containing material used in the first bio-filter is impregnated with the nanomaterial in the wood activated carbon, further enhancing the adsorption ability of the wood activated carbon, thereby increasing the removal efficiency of harmful substances and improving the photocatalytic property of the adsorbent.

The nano metal-containing material preferably contains at least one of metals such as Fe, Cu, Mg, and Ca, and metal oxides such as SiO ₂ , Al ₂ O ₃ , MgO, and CaO. The diameter of the nano metal is preferably 30 nm or less, more preferably 10 nm or less, and the content thereof is preferably 300 to 20,000 ppm based on the activated carbon mass.

The hydrophilic adsorbent used in the first biofilter is a substance added to adsorb a soluble substance preferentially in the first biofilter, and zeolite, kaolin, bentonite, or the like can be used.

The first biofilter 10a is prepared by preparing a coating slurry, coating the coating slurry on the porous matrix layer, and then heat treating the coating slurry. The coating slurry contains 10 to 20 wt% of wood activated carbon, 10 to 20 wt% of hydrophilic adsorbent, Polymer resin in an amount of 5 to 15 wt%, and the remainder in water to 300 to 20,000 ppm based on the amount of activated carbon. The water-dispersible polymer resin is preferably at least one selected from a water-dispersible polyurethane resin and a water-dispersible acrylic resin.

As shown in FIG. 3, the first bio-filter may be formed by laminating several porous matrix layers 11a. In this case, it is possible to more efficiently remove soluble harmful components in the material to be treated.

The bio carrier 10b also has the function of adsorbing harmful harmful components and decomposing them into microorganisms. Like the first bio filter 10a, the adsorbent and the nano metal-containing substance having excellent adsorption properties adhered to the filter matrix and the matrix And may further comprise a hydrophilic adsorbent.

The matrix of the bio carrier 10b is preferably made of a material that is more elastic than the matrix of the first bio filter 10b because it provides more space for the proliferation of more microorganisms and the degradation of the soluble harmful components. As the matrix of the bio carrier 10b, a material such as polyurethane or the like may be used.

The adsorbent and the hydrophilic adsorbent used for the bio carrier 10b are the same as those of the first bio filter, and the manufacturing method thereof and the components of the coating slurry are the same as those of the first bio filter.

As described above, when the soluble substance is absorbed and adsorbed by the washing water 40, the first biofilter 10a, and the biofilm 10b stepwise, the biofilter and the biofilm are overloaded even if the soluble harmful component increases sharply It is possible to keep the growth environment of the microorganism constant and to prevent excessive growth of microorganisms. Therefore, the soluble organic substance can be effectively removed regardless of the concentration or the throughput of the soluble harmful component.

The necessary moisture in the first biofilter 10a is supplied from the washing water storage tank 50 through the washing water transfer pipe 53b and is sprayed to the first biofilter 10a through the spray nozzle 55. [ The sprayed wash water flows back to the wash water storage tank (50) through the wash water transfer pipe (53a). The washing water is maintained at a constant temperature by a constant temperature heater (not shown) attached to the inside of the washing water storage tank 50 and repeats the above circulation. At this time, the washing water is purified by repeated circulation, and the organic and inorganic compounds at a constant concentration are maintained, so that the number of microorganisms can be controlled, so that excessive proliferation of microorganisms can be prevented even for a long period of operation.

The material to be treated passed through the first biofilter 10a and the bio carrier 10b is transferred to the second filter unit 20 (d path). Insoluble harmful components present in the harmful substance are adsorbed while passing through the second filter unit 20. [ And the second filter unit 20 includes a hydrophobic second bio-filter.

The required washing water in the second filter unit 20 is supplied from the washing water storage tank 50 or is supplied through the washing water inflow pipe 53c as in the first filter unit 10, (20). ≪ / RTI >

The second biofilter constituting the second filter unit 20 is a filter that adsorbs insoluble harmful substances and decomposes them into microorganisms. The filter has a filter matrix having a small air resistance and a porous property, An adsorbent and a nano-metal-containing material.

The filter matrix of the second biofilter is composed of at least one porous matrix layer selected from polypropylene, polyethylene, polyvinyl chloride (PVC), and the like, and a polyurethane matrix layer.

The filter matrix of the second biofilter may be a laminate of the porous matrix layer 21 and the polyurethane matrix layer 22 (see FIG. 5). It is possible to prevent the deformation of the filter form in the case of laminated bonding and to remove the harmful components more efficiently due to the different structure among the laminated filter matrix layers.

The adsorbent and nano-metal-containing material used in the second biofilter are as described in the first biofilter 10a.

The second biofilter is prepared by preparing a coating slurry, coating the filter matrix with a coating slurry, drying the coated slurry, and coating the granular activated carbon on the dried slurry. The coating slurry is prepared by adding 10 to 20 wt% of wood activated carbon powder (100 mesh or less), 5 to 10 wt% of water dispersible polymer resin, and the remainder of water to 300 to 20,000 ppm of nanometer metal- And the granular activated carbon is preferably 30 to 80 mesh or less. The water-dispersible polymer resin is preferably at least one selected from a water-dispersible polyurethane resin and a water-dispersible acrylic resin.

The material to be treated which has passed through the second filter portion 20 is transferred to the third filter portion 30 (e path). The material to be treated is removed from the third filter part 30 by water and residual harmful substances, and moisture and remaining harmful substances are removed by the discharge blower 72 through the discharge pipe 71 into the atmosphere (F path).

The third filter unit 30 is a filter that removes excess moisture contained in the substance to be treated and finally removes a small amount of harmful substances not processed in the first and second filter units. And a third biofilter which is connected to the second biofilter.

The third biofilter constituting the third filter unit 30 may be composed of a filter matrix, an adsorbent attached to the filter matrix, and a nano-metal-containing material, and may further comprise an adsorption filler filled in the filter matrix.

The filter matrix of the third biofilter may include at least one porous matrix layer selected from polypropylene, polyethylene, polyvinyl chloride (PVC) and the like as in the second biofilter, and a polyurethane matrix layer .

The filter matrix of the third biofilter may be laminated with the porous matrix layer 32 and the polyurethane matrix layer 31 (see FIG. 6). It is possible to prevent the deformation of the filter form when stacked, and to remove harmful substances more efficiently due to the different structure among the stacked matrix layers.

The adsorbent used in the third biofilter passes water to the second biofilter and removes water and a small amount of residual harmful substances from the target material from which harmful substances are mostly removed, and performs antibacterial and sterilization treatment with microorganisms. As the adsorbent, wood activated carbon such as that in the first biofilter 10a may be used. The wood activated carbon in the third biofilter preferably has a specific surface area of 1200 m ² / g or more.

The nano-metal-containing material used in the third biofilter can be used by impregnating nanomaterials on the wood activated carbon. The nanomaterial-containing material adhered to the wood activated carbon further improves the adsorption power of the wood activated carbon, And increases the antibacterial ability.

The nano-metal-containing material preferably includes silver (Ag), iron (Fe), zinc (Zn) and the like excellent in sterilization and antibacterial ability. The diameter of the nano metal is preferably 30 nm or less, more preferably 10 nm or less.

The adsorption filler of the third biofilter is a substance for sterilizing and antibacterial effect more effectively, and is made of an adsorbent and a nano-metal-containing substance. The adsorbent is made of the same wood activated carbon as in the first biofilter, and the nanomaterial-containing material is composed of silver (Ag), iron (Fe), zinc (Zn), and the like.

The third biofilter is prepared by preparing a coating slurry, coating the coating slurry on the filter matrix and drying, and then filling the filter matrix with an adsorption filler.

The coating slurry of the third biofilter is composed of 20 to 30 wt% impregnated activated carbon powder (100 mesh or less), 5 to 10 wt% of water-dispersible polymer resin, 0.05 to 1.0 wt% of nano metal-containing material, . The water-dispersible polymer resin is preferably at least one selected from water-dispersible polyurethane resin and water-dispersible acrylic resin.

 The adsorption filler is prepared by adding 0.05 to 1.0 wt% of nanometer metal-containing material to activated carbon (8 to 20 mesh), and filling the prepared adsorption filler into the porous matrix layer.

When the microorganisms are excessively proliferated, the pores existing in the biofilter or the bio carrier are clogged with microorganisms, so that the harmful substances can not pass smoothly, so that it is difficult to efficiently remove harmful substances. However, when the harmful substances are removed using various stages of biofilters as in the present invention, the biofilters in each stage are prevented from being overloaded, and the microbial growth environment is maintained constant.

Therefore, excessive growth of microorganisms is suppressed, and harmful substances can be effectively removed by a multi-stage bio-filter. In addition, it is possible to remove efficiently soluble substances and non-decomposable substances in harmful substances in a stepwise manner.

Hereinafter, a method for removing harmful substances using the apparatus for removing harmful substances according to the present invention will be described with reference to the accompanying drawings.

2 is a flowchart of a method for removing harmful substances according to the present invention.

As shown in FIG. 2, the method for removing harmful substances according to the present invention includes a step S1 for dissolving and absorbing a substance to be treated by washing water, a step S2 for removing harmful components by the first filter unit, An insoluble harmful component removing step (S3) by a filter unit, and a water removing step (S4) by a third filter unit.

The step S1 shown in FIG. 1 is a step of passing the harmful substances flowing into the inside of the harmful material removing device through the washing water, and absorbing and removing harmful harmful components contained in the material to be treated with the washing water.

In step S2 shown in FIG. 1, the harmful substances having passed through the washing water are passed through the first filter unit to adsorb and decompose the harmful harmful components in the treated substances into microorganisms. In step S1, The soluble component is adsorbed on the first biofilter and the bio carrier, and decomposed and removed by using the biofilter and the microorganisms present in the bio carrier. The first biofilter and the bio carrier are the same as those described above in the apparatus for producing harmful substances.

In step S3 shown in FIG. 1, the harmful substances having passed through the first filter unit are passed through the second filter unit to adsorb insoluble harmful components in the target material and decompose them into microorganisms. The second biofilter is the same as that described above for the production of toxic substances.

In step S4 shown in FIG. 1, the harmful substance passing through the second filter unit is passed through the third filter unit to remove moisture and remaining harmful substances, and the step of antibacterial and disinfecting. The third filter unit is the same as that described above in the apparatus for producing harmful substances.

Hereinafter, the remarkable effects of the present invention will be described in more detail with reference to examples. However, these embodiments are only examples of the present invention, and the scope of the present invention is not limited thereto.

(1) Preparation of the first biofilter and the bio carrier

30.5 L of 45 wt% water-dispersible polyurethane resin solution and 66.1 L of distilled water were added to a 100 L mixing tank equipped with a stirrer, stirred for about 30 minutes, and then mixed with 5 nm Al ₂ O ₃ 4 L of a nano solution (2 wt%) and 2 L of a 20 nm iron (Fe) nano solution (2 wt%) were sequentially added and stirred. 5 kg of synthetic zeolite, 5 kg of bentrite and 10 kg of charcoal activated carbon powder were sequentially added and slurried. After the addition, the mixture was stirred at room temperature for 6 hours to prepare a coating slurry of the first biofilter and the bio carrier.

Each of the coating slurries was coated with a polypropylene matrix and a polyurethane matrix, and then the excess slurry was removed. The slurry was dried in air at 80 ° C for 12 hours, heat-treated at 120 ° C for 30 minutes, and then cooled.

Three polypropylene matrices (11a, 620 mm (L) x 1090 mm (W) x 20 mm (H)) prepared as described above were laminated and adhered with a polypropylene heat sealer as shown in Fig. 3 to prepare a first biofilter 4, the polyurethane matrix 10b, 25 ppi was cut into a size of 30 mm (L) 30 mm (W) 30 mm (H) (cube) to prepare a biocarrier.

(2) Preparation of the second biofilter

30.5 L of a 45 wt% water-dispersible polyurethane resin solution and 66.1 L of distilled water were added to a 100 L mixing tank equipped with a stirrer and stirred for about 30 minutes. Then, 4 L of a 5 nm Al ₂ O ₃ nano solution (2 wt%) and 20 nm And 2 L of iron (Fe) nano solution (2 wt%) were sequentially added and stirred. Then, 20 kg of charcoal activated carbon powder was added and slurried. After the addition, the mixture was stirred at room temperature for 6 hours to prepare a coating slurry of the second biofilter matrix.

The coating slurry was coated with a polypropylene matrix layer, and then the excess slurry was removed. The slurry was dried in air at 80 ° C for 12 hours, heat-treated at 120 ° C for 30 minutes, and then cooled.

Thereafter, the polyurethane matrix layer thus treated was passed through a compression roller to remove the excess slurry, and granular activated carbon (30 to 80 mesh) was coated on the surface of the polyurethane matrix layer under vibration, Dried for 12 hours, heat-treated at 120 ° C for 30 minutes, and then cooled.

The polypropylene matrix layer and the polyurethane matrix layer prepared above were cut to a size of 620 mm (L) x 1090 mm (W) x 20 mm (H), and the polyurethane matrix layer 22 was formed on the inside as shown in Fig. 2, and the polypropylene matrix layer 21 was laminated on the outer side thereof. Then, the laminate was bonded with a PP thermo-adhesive to prepare a second bio-filter.

(3) Production of the third biofilter

30.5 L of 45 wt% water-dispersible polyurethane resin solution and 66.1 L of distilled water were added to a 100 L mixing tank equipped with a stirrer, stirred for about 30 minutes, and 4 L of a 5 nm Al ₂ O ₃ nano solution (2 wt%) and 3 nm And 10 L of silver (Ag) nano solution (2 wt%) were sequentially added and stirred. Then, 20 kg of activated carbon powder was added and slurried. After the addition, the mixture was stirred at room temperature for 6 hours to prepare a coating slurry of the third biofilter matrix.

The coating slurry was coated with a polypropylene matrix layer, and then the excess slurry was removed. The slurry was dried in air at 80 ° C for 12 hours, heat-treated at 120 ° C for 30 minutes, and then cooled.

The polyurethane matrix layer (25 ppi) was carried on the coating slurry, passed through a compression roller to remove the excess slurry, dried in air at 80 ° C for 12 hours, heat-treated at 120 ° C for 30 minutes, and then cooled.

Then, 10 L of 3 nm silver (Ag) nano solution (2 wt%) and 100 kg of granular activated carbon of 8-20 mesh were mixed and dried in air at 80 ° C. for 12 hours to prepare an adsorbent for polypropylene matrix filling.

The coated polypropylene matrix and the polyurethane matrix (25 ppi) were cut to have a size of 620 mm (L) x 1090 mm (W) x 20 mm (H). Then, as shown in Fig. 6, The matrix layer 31 and the two polypropylene matrix layers 32 were alternately laminated and the polypropylene matrix layer 31 was filled with the adsorbent for filling the matrix thus prepared to prepare a third biofilter.

(4) Manufacture of harmful substances removal device using bio filter

The first biofilter, the second biofilter, and the third biofilter manufactured as described above were placed in a rectangular housing (36m 3) having an inner diameter of 3 m (L) x 3 m (W) x 4 m (H) As shown in FIG.

In addition, harmful substances are introduced from two pipes of 350 mm in diameter at a rate of 120 m 3 / min, and the discharge port is discharged into a pipe of 500 mm diameter and connected to the blower. Also, the water spraying system was provided with a spray water storage tank (1 m (L) x 1 m (W) x 1 m (H)), an alkaline solution reservoir 100 L, a water spray nozzle and a pH controller as shown in FIG.

Microbial adhesion is stylized form a biofilm in the biofilter using the number of processing biological treatment in the field, the operating conditions are a temperature 10 ~ 40 ℃, relative humidity of 90% or more, the air volume more than 120 ㎥ / min, the differential pressure 25 mmH ₂ O .

The concentration of NH ₃ , H ₂ S and (CH ₃ ) ₃ N was measured at the inlet and outlet of toxic substances with elapsed time while installing harmful substances removing device using multi-stage biofilter and removing harmful substances for a certain period 7 to 9 show the results.

In FIGS. 7 to 9, the x-axis represents elapsed time (days) and the y-axis represents concentration (ppm). The concentration of the harmful substances (NH ₃ , H ₂ S, (CH ₃ ) ₃ N) in the inlet is different depending on the measurement date, but it can be seen that most harmful substances are removed regardless of the concentration. That is, even if the concentration of the harmful substances is high and the overload is applied, the harmful substances are efficiently removed by the multistage filter.

In addition, it can be seen that there is no difference in the removal rate of harmful substances from the point of time when the device for removing harmful substances is installed, and the point of time when more than 300 days have elapsed, it can be seen that the microbial growth is suppressed and the microbial growth environment is kept constant even when used for a long time . Therefore, the cost incurred by replacing the filter can be reduced.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. It will be understood that variations and specific embodiments which may occur to those skilled in the art are included within the scope of the present invention.

1 is a schematic view of an apparatus for removing harmful substances according to the present invention.

2 is a flowchart of a method for removing harmful substances according to the present invention.

3 is a perspective view of a first biofilter according to an embodiment of the present invention.

4 is a perspective view of a bio carrier according to an embodiment of the present invention.

5 is a perspective view of a second biofilter according to an embodiment of the present invention.

6 is a perspective view of a third biofilter according to an embodiment of the present invention.

FIG. 7 is a graph illustrating the concentration of NH ₃ at the inlet and outlet of a harmful substance in the apparatus for removing harmful substances according to an embodiment of the present invention, according to elapsed time.

FIG. 8 is a graph illustrating the concentration of H ₂ S at the inlet and outlet of toxic substances in an apparatus for removing harmful substances according to an embodiment of the present invention, according to elapsed time.

FIG. 9 is a graph showing the concentration of (CH ₃ ) ₃ N measured at an inlet and an outlet of a toxic substance in an apparatus for removing harmful substances according to an embodiment of the present invention, according to elapsed time.

Description of the Related Art

3: Wash water fresh water part 4: Inflow pipe

5: external air inflow part 10: first filter part

10a: first bio-filter 10b: bio-carrier

20: second filter unit 30: third filter unit

40: washing water 50: washing water storage tank

51: Level switch 52: Wash water inflow control valve

60: alkali solution reservoir 61: alkaline solution inflow control valve

71: exhaust pipe 72: blower

Claims (29)

A washing water fresh water storing part for storing the washing water so that the material to be treated can pass through; A first biofilter and a hydrophilic first biofilter spaced apart from the wash water fresh water portion, the first biofilter being adapted to pass the target substance to remove soluble harmful components; A second biofilter that is spaced apart from the first biofilter and the bio carrier, the hydrophobic second biofilter passing the target substance to remove insoluble harmful components; A third biofilter installed apart from the second biofilter and adapted to remove moisture and residual harmful substances by passing through the target material, and to perform antibacterial and sterilization treatment; / RTI > Wherein the first to third biofilters and the bio carrier comprise a filter matrix, an adsorbent, and a nanometal-containing material, The filter matrix of the first biofilter A plurality of porous matrix layers are laminated, The filter matrices of the second and third biofilters Wherein a porous matrix layer and a polyurethane layer are laminated and bonded to each other. The method according to claim 1, Wherein the first to third biofilters and the bio carrier are spaced apart from each other in a single housing. 3. The method of claim 2, Wherein the first to third biofilters and the bio carrier are vertically spaced apart from each other. The method according to claim 1, And a washing water storage tank installed to supply washing water circulating the washing water fresh water portion, the first biofilter, and the second biofilter. 5. The method of claim 4, The wash water storage tank A level switch attached to the wash water storage tank for detecting the amount of wash water remaining therein, and a wash water inflow control valve connected to the level switch for introducing the wash water under the control of the level switch. 5. The method of claim 4, The wash water storage tank A pH meter disposed within the wash water storage tank for sensing the pH of the wash water; An alkaline solution reservoir storing an alkaline solution for adjusting the pH of the wash water and connected to the alkaline solution to be introduced into the wash water reservoir; And And an alkaline solution inflow control valve attached to the alkaline solution reservoir for introducing the alkaline solution into the wash water reservoir under the control of the pH meter. The method according to claim 1, The adsorbents of the first to third biofilters and the bio carrier are Wherein the activated carbon is one selected from the group consisting of bamboo activated carbon, pine activated carbon, oak activated carbon, spruce activated carbon, coconut activated carbon, acacia seed activated carbon, and peach seed activated carbon. The method according to claim 1, The nano-metal-containing material of the first bio-filter, the bio-carrier, and the second bio- Toxic substances removing device comprising a nano-size of Fe, Cu, Mg, Ca, SiO 2, Al 2 O 3, MgO , or one or more kinds selected from CaO. The method according to claim 1, Wherein the first biofilter and the bio carrier further comprise a hydrophilic adsorbent. 10. The method of claim 9, Wherein the hydrophilic adsorbent comprises one or a mixture of two or more selected from zeolite, kaolin and bentonite. The method according to claim 1, The filter matrix of the first biofilter And a porous matrix layer containing at least one selected from polypropylene, polyethylene and PVC, Wherein the filter matrix of the bio carrier is made of polyurethane. The method according to claim 1, The filter matrix of the second biofilter Wherein a porous matrix layer containing at least one selected from the group consisting of polypropylene, polyethylene, and PVC and a polyurethane matrix layer are laminated and bonded to each other. The method according to claim 1, The filter matrix of the third biofilter A porous matrix layer comprising at least one selected from the group consisting of polypropylene, polyethylene and PVC, and a polyurethane matrix layer, Wherein the porous matrix layer is filled with an adsorption filler. 14. The method of claim 13, Wherein the adsorptive filler comprises wood activated carbon and a nano-metal containing material impregnated on the wood activated carbon. 15. The method of claim 14, The wood activated carbon includes at least one selected from bamboo activated carbon, pine wood activated carbon, oak activated carbon, spruce wood activated carbon, palm kernel activated carbon, apricot kernel activated charcoal and peach seed activated carbon, Wherein the nano-metal-containing material comprises at least one selected from nano-sized Ag, Fe, and Zn. delete delete delete delete delete delete delete delete delete Dissolving and absorbing the substance to be treated by washing water; Passing the substance to be treated through a hydrophilic first biofilter and a bio carrier to remove harmful harmful components; Passing the substance to be treated through a second biofilter to remove insoluble harmful components; Passing the substance to be treated through a third biofilter to remove water and residual harmful substances; / RTI > Wherein the first to third biofilters and the bio carrier comprise a filter matrix, an adsorbent, and a nanometal-containing material, The filter matrix of the first biofilter A plurality of porous matrix layers are laminated, The filter matrices of the second and third biofilters Wherein a porous matrix layer and a polyurethane layer are laminated and bonded to each other. 26. The method of claim 25, Further comprising mixing the substance to be treated with external air before dissolving and absorbing the substance to be treated by the washing water. delete delete delete

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