KR101195412B1 - Biofilter apparatus, biofilter system comprising thereof, and operating method thereof - Google Patents

Abstract

The present invention relates to a biofilter device, a system and a method of operating the same for removing odors and volatile organic compounds, and more particularly, a biofilter device, a system, and an operation of a self-supported biofilter layer formed of a biocarrier supported by water. It is about a method.

In the biofilter device according to the present invention, the biofilter layer is present in a self-supporting form in an aqueous solution, and the carrier submerged in the aqueous solution is transferred from the lower aqueous solution layer to the upper portion of the biofilter layer by a transfer pump, thereby allowing the carrier to be circulated from the top to the bottom for a long time. Operation is possible without clogging, and by spraying the lower aqueous solution to the upper part of the aqueous solution layer and the upper part of the biofilter layer, respectively, to lower the BOD in the aqueous solution and to further absorb the odor flowing into the biofilter layer, further increasing the removal efficiency. It provides a new type of biofilter device that has high removal efficiency and does not block the biofilter layer even during long-term operation.

In addition, a pretreatment device is installed in front of the biofilter device to solve the instability of the filter device due to the change in the concentration of pollutants in the inlet gas.

Bio filter

Description

Biofilter device, biofilter system including the same and its operating method. {BIOFILTER APPARATUS, BIOFILTER SYSTEM COMPRISING THEREOF, AND OPERATING METHOD THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biofilter device, a system and a method of operating the same for removing odors and volatile organic compounds, and more particularly, to a biofilter device, a system and a method of operating the self-supported biofilter layer formed of a biocarrier. .

Odor and volatile organic compounds emitted from various industrial facilities, waste water purification treatment facilities, and food waste treatment facilities are released into the air, causing air pollution problems, and various efforts and methods for removing them have been proposed.

In general, adsorption / absorption by physical methods, combustion and plasma treatment methods by chemical methods, biofilter methods by biological methods, etc., or mixed methods have been mainly proposed. However, in many ways, it can be accompanied by excessive operating costs, facility costs, operational disturbances, and environmentally friendly secondary problems.

Treatment of odors and volatile organic compounds by biofilters has been recently developed and proven to be effective, but clogging of biocarriers filled with a fixed bed in biofilters during long periods of operation has been observed. Since the existing biofilter unit has a support plate such as a support plate or a mesh having a plurality of holes in the lower and middle portions of the device and fills the biocarrier in the form of a fixed bed thereon, the shape of the carrier Regardless of the density of each other and stagnated / fixed and charged, the microorganisms overgrown during long periods of operation, debris generated from microorganisms, or contaminants accompanying contaminated air / fluids are mixed and accumulated on the carrier or the surroundings and flow paths C) pores become clogged and harden. This impedes the upflow of air flow and generates drift, and also distorts and causes downflow of microbial medium liquid or wash water supplied through the upper spray nozzle, etc., As a result, the performance of the biofilter unit is significantly reduced, and the pressure difference (△ P) during operation is increased to increase the power ratio, and sometimes accompanied by problems such as lack of contact time of contaminated gas in the ubiquitous gas flow. Eventually, the levels will be tightly entangled with each other, causing the biofilter system to be shut down and the carriers replaced with new ones. In addition, the phenomenon may be promoted when the concentration of the introduced polluted air is irregularly increased.

There are several ways to solve this problem. Patent 10-0665548, 20-0418100, a method for periodically discharging the aggregated bio-carrier by attaching a screw device for discharging a small amount of the bio-carrier to the outside on the carrier support plate of the bio-filter unit, the discharge A new or regenerated carrier must be additionally charged to the upper part of the bio filter unit as much as the amount of the biomass is discharged. In addition, a mechanical force is applied to the carrier when discharging the carrier, which may damage the carrier shape. Patent 10-0495310 proposes a method for periodically supplying the washing water by installing the washing water line inside the biofilter filled with the stationary phase, but in the state where the biocarrier is filled with the stationary phase, the contact between the washing water and the biocarrier is at the periphery thereof. In particular, installation of additional water dispensing nozzles for the supply of the wash water and overall contact of the biocarrier, attachment of additional mechanical devices such as a high pressure wash water supply device, a flow rate control device, and a pressure control device may occur. As the size of the additional equipment increases. In Patent 10-0500706, in order to provide high quality fecal soil, an agitating device is installed on the odor gas injection pipe at the bottom of the deodorizing tank, and the biocarrier is stirred up and down. A method of maintaining the water content of fecal soil uniformly while being in contact with stirring has been proposed.

Accordingly, there is a continuing need for a new biofilter system capable of maintaining the processing performance of the biofilter even in a long time operation.

It is an object of the present invention to provide a novel biofilter device in which the ability to remove for a long time is maintained.

Another object of the present invention is to provide a novel biofilter system comprising a pretreatment device.

It is yet another object of the present invention to provide a method of operating a novel biofilter system comprising a pretreatment device.

Another object of the present invention is to provide a novel biofilter consisting of a suspended carrier.

Another object of the present invention is to provide a new pretreatment device for use in a biofilter.

In order to achieve the above object, the biofilter device according to the present invention is

The biofilter layer made of a floating biocarrier includes a reaction tank in which a portion of the biofilter layer is submerged under water.

In the present invention, the biofilter device is a odor and volatile organic compound removal device using a bio (microbial) filter.

In the present invention, the biocarrier in which the specific gravity is adjusted lightly than water is filled in the biofilter reactor without a support plate, and the lower portion of the entire filter layer is self-suspended in a state of being immersed in an aqueous solution.

In the present invention, the biocarriers can maintain a specific gravity of 0.01 to 0.97 so that the lower portion is submerged in water while the filter layer is suspended in water, more preferably 0.1 to 0.5 in consideration of the degree of submersion of the filter layer. It is good to stay as.

In the present invention, the carriers at the bottom submerged in the aqueous solution layer in the biofilter layer are moved from the bottom to the top to perform the continuous washing of the biocarrier during operation, which is accumulated microorganisms excessively around the microorganism carrier or residues introduced from the outside Providing a function that prevents accumulation, it operates for a long time without clogging.

In the practice of the present invention, the carriers can be transported through the pumps while aeration through the air diffuser so that the transport from the bottom to the top is desired.

Biofilter reactor according to the present invention by installing a separate aqueous solution circulation nozzle at the top of the aqueous solution layer and the top of the biofilter layer in order to maximize the removal efficiency and by circulating spraying the aqueous solution in which the carrier is separated from the bottom of the aqueous solution layer, BOD in the first aqueous solution Second, the circulating aqueous solution absorbs the odor gas or pollutant flowing into the biofilter layer, increasing the ability to decompose by microorganisms, and in particular, adds the function as a buffer tank when the odor gas or pollutant is high in concentration or the inflow load is large. To provide.

In the present invention, the specific gravity-controlled biocarrier has a specific gravity of about 1 or less, preferably in the range of 0.01 to 0.97, preferably 0.05 to 0.9, and polyethylene, polypropylene, polystyrene, PVC, EVA resin, polyurethane, nylon General plastics, such as rubber, may be molded into a specific shape and foamed in a closed pore form, or may be molded into a hollow cavity, or a porous inorganic carrier may be coated with a plastic material from the outside.

In the practice of the present invention, the biocarrier may be prepared in the exemplary form shown in FIG. 2, but not limited thereto. Buoyancy is generated because the specific gravity of the biocarrier is lower than that of the aqueous solution. The buoyancy generated in the carriers of the biofilter layer submerged in the aqueous solution is naturally balanced with the weight of the biocarrier filled in the upper and middle portions of the biofilter layer. In general, the biocarrier is in the form of a support in an aqueous microbial medium solution.

In the present invention, during operation, the aqueous solution and the biocarrier at the bottom of the biofilter layer are circulated to the top of the biofilter layer through an air-lift pump or a sludge pump to promote the absorption and adsorption of polluted gas. At the same time, it provides a function of preventing the blockage caused by the biocarrier solids occurring at the lower and lower ends of the normal stagnant biofilter. In other words, microbial sludge or other solids accumulate and aggregate in the biocarrier, so that a pressure drop increases, and thus, inflow gas cannot be supplied to the biofilter, and contaminated gas is poorly contacted with the carrier portion of the biofilter. It provides a function to prevent the malfunction.

In the practice of the present invention, the circulation function of such a biocarrier provides a stable and long-term continuous operation, wherein the circulation of the biocarrier may be continuously or periodically performed depending on the type and amount of inflow gas. For this purpose, the air lift pump method is applied in a mechanically more useful manner than the slurry pump, and in some cases, two-stage and three-stage air lift pumps may be used. In addition, the air lift pump may be installed anywhere inside or outside the biofilter unit. In order to aid circulation by the pump of the lower carrier of the aqueous solution, an appropriate amount of air is continuously or intermittently injected into the aqueous solution layer to make the circulation much smoother.

In the present invention, the aqueous solution can be circulated in order to lower the BOD in the aqueous solution and increase the removal efficiency of the polluting gas introduced into the biofilter layer. Preferably, separate aqueous solution circulation nozzles are installed at the upper end of the aqueous solution layer and the upper end of the biofilter layer. By circulating and spraying only the aqueous solution in which the carrier is separated from the lower portion of the aqueous solution layer through these nozzles, the BOD-lowered aqueous solution absorbs and adsorbs the polluting gas or the odorous gas, which is decomposed and reaches the aqueous solution layer. It provides more beneficial effect in case of contamination, irregular high inflow of odor gas or increase of flow rate. During the circulation of the aqueous solution, the biocarrier is rebalanced slightly by immersion into the aqueous layer, depending on the weight of the aqueous solution passed through.

According to an aspect of the present invention, in order to achieve the above object, a biofilter layer made of a floating biocarrier is partially self-suspended while submerged under the water surface of a microbial medium aqueous solution; And it provides a biofilter system for removing odor and volatile organic compounds consisting of a pretreatment device filled with an adsorbent.

In the present invention, the biofilter and the pretreatment device may be installed inside or outside the aqueous solution reservoir for supplying a stable aqueous solution.

In the practice of the present invention, the biofilter system comprises a) a pretreatment device for passing contaminated gas / air consisting of various components through a monolithic parallel plate bed (PPB) consisting of activated carbon filters, b) pretreated contaminated fluid / air Transfer part to be transferred to the bio-filter device, c) Bio-filter device connected to the transfer unit, d) Bio-filter layer consisting of a bio-carrier with a specific gravity controlled in the aqueous solution layer inside the bio-filter device, e) Supply of gas installed inside the bio-filter device Pipes and nozzles, f) Pump for transporting carriers installed inside or outside the biofilter unit, g) Bio-aqueous solution part of the biofilter, h) Microbiological solution level control and breeding device of the biofilter part, i) Aqueous solution of the carrier in the aqueous layer Separation device from, j) reservoir for pre-treatment of separated aqueous solution, k) feeding nutrition of microorganisms in reservoir Supply pumps and pipes, l) pH adjusting solution supply pumps and pipes for adjusting pH in the reservoir, m) steam and cooling water supply pipes for adjusting the temperature in the reservoir, n) circulating aqueous solution from the reservoir to the biofilter layer. Pump, o) piping and spray nozzles for spraying aqueous solutions circulated to the top and bottom of the biofilter layer, and p) purged gas / air outlets.

In order to achieve the above object, the present invention provides a method for removing contaminated fluid or contaminated air by passing through a flowable filter layer in which the biocarriers are mixed with the aqueous solution.

The present invention also provides, in one aspect, a) an inlet for contaminated gas / air supplied from a source; Adsorbent bed through which the pollutant is adsorbed while the contaminated fluid passes; Injector for injecting an aqueous solution to the bed; A storage tank for recovering the sprayed aqueous solution and circulating it to the spraying apparatus; And a pretreatment device consisting of: b) a floating biocarrier, the lower part of which is submerged under the water surface of the aqueous solution; Aqueous solution sleep control and culture piping; A gas supply nozzle installed under the bio filter layer; A pump for circulating the carrier submerged in the aqueous solution together with the solution to the top of the biofilter layer; A storage tank of an aqueous solution in which the carrier is separated; Temperature control of the reservoir; Reservoir aqueous solution circulation pump; Pipe and spray nozzles for spraying an aqueous solution to the top of the biofilter layer and the top of the aqueous solution layer; A biofilter device comprising a purified gas / air outlet, c) a reservoir and supply pump for supplying nutrients of microorganisms to the aqueous reservoir, and d) a pH adjusting solution reservoir and a supply pump for adjusting the pH of the aqueous reservoir Provides a method of operation to remove odors, volatile organic compounds and other contaminants by operating.

In the present invention, the air flow rate in the air lift pump for circulating the carrier submerged in the aqueous solution together with the solution to the top of the biofilter layer is preferably maintained at 0.3 to 50 m / s, the discharge flow rate in the aqueous solution circulation nozzle is 0.1 m It is preferable to set it to 10 m / s at / s, and to control the temperature of the aqueous solution reservoir and the flow rate of the aqueous solution circulated from the reservoir to the upper filter layer, and finally to control the biofilter layer and the ambient gas temperature.

In addition, it is preferable to adjust the temperature in the adsorption bed by adjusting the temperature of the aqueous solution reservoir installed in the pretreatment apparatus and the circulation flow rate to the upper part of the adsorption bed, and the temperature is operated at 0-100 ° C, preferably 10-90 ° C. It is good.

In addition, the pretreatment tank attaches and stacks or rolls a PPB (parallel passage bed) bed or corrugated mesh in which the adsorbent in the adsorption bed is attached to a spacer between mats or felts in which the woven carbon fibers are woven so that an air flow path at a predetermined interval exists. It is preferable that the pressure drop of the fluid in the bed is reduced by a bed made of a honeycomb-shaped air channel.

In one aspect, the present invention consists of a carrier foamed or coated on porous particles or at least one resin selected from the group consisting of polyethylene, polypropylene, polystyrene, polybutylene, PVC, EVA resin, nylon, polyurethane, rubber In addition, the biofilter layer provides a biofilter layer in which the specific gravity of the carrier is adjusted to 0.01 to 0.97 so that a portion of the biofilter layer is submerged under the surface of the liquid.

In one aspect of the invention, the specific gravity 0.01-0.97 foamed or coated on the porous particles of at least one resin selected from the group consisting of polyethylene, polypropylene, polystyrene, polybutylene, PVC, EVA resin, nylon, polyurethane, rubber It provides a phosphorus bio carrier.

According to the present invention, there is provided a biofilter apparatus in which performance does not deteriorate even after long-term operation. In addition, a pretreatment apparatus and an aqueous solution reservoir required for its operation were provided.

In addition, according to the present invention, a biofilter system including a pretreatment apparatus, an aqueous solution storage tank, and a biofilter apparatus has been provided, which enables stable operation against sudden changes in operating conditions.

Hereinafter, with reference to the drawings will be described in detail.

As shown in FIG. 1, the biocarrier 11 whose specific gravity is lower than the water is floated in the aqueous solution layer under the biofilter reactor to be continuously washed during operation and transferred to the upper portion of the biofilter layer by the carrier transfer pump 19. Ultimately the carrier layer moves slowly from top to bottom. For example, the biocarrier 11 having a specific gravity of about 0.2 receives a buoyancy of about 0.8 based on the volume of the biocarrier submerged in water, which is the weight of the biocarrier filled in the upper part of the aqueous solution and the stagnant circulation in the upper part. The biofilter is fluidly filled in a floating state on the aqueous solution, balancing itself with the total weight of the aqueous solution.

As shown in FIG. 2, the biocarrier may be used in various shapes, but is not limited to the shape shown. The hollow cavity forms an upward flow of contaminated gas while increasing the contact area between the pollutant gas and the biocarrier. The upflow is advantageous for inducing a uniform flow throughout the biofilter section. In addition, the down flow distribution of the aqueous solution circulated from the upper part to the lower part is maintained uniformly, and the sufficient upflow of the upstream gas flow and the downflow aqueous solution is induced to improve the performance of the biofilter. The biocarrier 11 is formed by foaming polymer resins such as polyethylene, polypropylene, polystyrene, PVC, nylon, polyurethane, and rubber with gas such as nitrogen and carbon dioxide, organic foaming by decomposition of organic compounds, and decomposable inorganic compounds. By controlling the specific gravity in such a way as to have a small closed pore of micro to millimeter level in the carrier by using a method such as saturating water and absorbing solvent under a high pressure reactor and then dropping the pressure, By forming the fly ash, porous activated carbon, and other porous ceramics by coating the polymer resin, etc., a molded biocarrier having an appropriate specific gravity can be provided. In addition, in the preparation of low specific gravity biocarriers, some layers may be coated with a non-foamed polymer resin and molded to maintain the mechanical strength of the carrier as illustrated in FIG. 1A. The polymer resin to be used is advantageous in that the hydrophilicity is not large, which can maintain the specific gravity of the carrier as water does not penetrate into the fine pores even during long time operation.

During operation, a large amount of fluids / air containing odors or volatile organic compounds can be distributed and supplied as uniformly as possible through the fluid / air inlet pipe and the nozzle 12 installed on the surface of the bio medium liquid. It is possible to make and use a dispersion pipe having a plurality of holes in the cylindrical pipe.

In order to transfer the carrier from the lower part of the biocarrier layer supported by the aqueous solution layer to the upper part of the biofilter layer, an appropriate amount of air is introduced through the air diffuser 14 under the aqueous solution layer to fluidize the supported carrier layer and induce a carrier collection pipe. The aqueous solution of the carrier is washed together via (27). At this time, as the pump for the pump 19, but using a slurry pump or an air lift pump, the latter is more convenient in terms of mechanical. In the air lift pump, it can be installed inside or outside the reactor, and it is effective to operate the air velocity at about 0.5 m / s or more, and it is advantageous to install the air lift pump in two or more stages when the head height is high. Do. The air aeration and the delivery of the carrier can be carried out continuously or periodically if necessary.

In order to increase the removal efficiency of the biofilter reactor and to buffer the change in concentration of the inlet gas, it is necessary to oxidize the aqueous solution biologically and circulate to the upper side. For this, a separate aqueous solution storage tank 22 and a circulation system are used. The reservoir may be a perforated plate with a hole smaller than the size of the carrier, or the perforated pipe may be attached to the reservoir so that only the aqueous solution from which the carrier is separated enters the reservoir. Install an air breeding pipe (23) at the top to discharge the air entering the reservoir. By supplying an appropriate amount of microbial nutrient solution (15) to the aqueous solution introduced into the reservoir and adjusting the pH by introducing the pH adjusting liquid (16), and also by supplying steam or cooling water (17) to adjust the temperature of the inlet gas by adjusting the temperature of the circulating water In spite of the change, the temperature inside the Biofilter reactor is kept constant. All conditions of the controlled reservoir solution is supplied to the upper and lower portions of the biofilter layer (the upper portion of the aqueous layer) through the transfer pump 20 while spraying evenly through the spray nozzle 26, but the flow rate through the valves (24, 25) Adjust. The aqueous solution supplied to the bottom passes through the carrier layer of the lower aqueous solution layer and biologically oxidizes BOD in the aqueous solution to reduce the concentration of contaminants in the solution. The biofiltering reaction occurs smoothly in the bed and also buffers the concentration change of the incoming gas. The aqueous solution containing sludge is discharged through the breeding tube 18 installed on the surface of the aqueous solution layer to automatically adjust the water level and the sludge concentration.

Odor and volatile organic compound pollutants (1) may be transported to the biofilter system with components or solids that the microorganisms cannot process, sometimes accompanied by rapid flow rate increase or concentration increase or temperature change. The operation of the filter may be unstable. In order to prevent this, an inlet gas pretreatment device as shown in FIG. 3 may be selectively added, and the adsorption bed (2) is installed in the upper part and the aqueous solution reservoir (3) is installed in the lower part, and then the circulating water from the lower part. Spraying can add functions such as filtration or absorption / adsorption. At this time, the adsorbent 4 used is a rectangular PPB (parallel passaged bed) laminated with a predetermined size using a corrugated sheet pleated in the flow direction after attaching a metal mesh to Mat or Felt manufactured by weaving activated carbon fiber. ) In order to prevent the loss of pressure in the bed to the maximum, use a circular bath in which an air channel is formed in a honeycomb form. In the lower part of the pretreatment tank, a temperature controlled aqueous solution tank 4 is installed in order to maximize the buffering effect on the concentration change of the inlet gas. Here, the temperature controlled aqueous solution is controlled by the pump 5 to the upper part of the adsorption bed. Spray through). The temperature of the aqueous solution is controlled by the concentration of the pollutant gas introduced by introducing the steam (6) into the steam diffuser (7) into the reservoir if necessary, and the temperature in the adsorption bed is 10-80oC regardless of the temperature of the inlet gas. In the case of high concentration, the operating temperature is lowered to increase the adsorption / absorption of pollutants in the gas in the reactor, and when the low concentration is introduced, the operating temperature is kept high to reduce the absorption / absorption. The water level in the aqueous reservoir is constantly adjusted through breeding piping and equipment. The primary pre-treated fluid / air is further processed by connecting the outlet 9 to the biofilter inlet pipe 12.

Example 1

The polystyrene resin was foamed in the form of a hollow tube with a diameter of 7 mm, extruded, and cut into a length of 7 mm to prepare a tube chip, but the specific gravity was maintained at 0.3. The carrier thus prepared was filled within 90% of a 50 cm diameter 300 cm reaction tank and filled with water to the bottom 120 cm, and an aqueous spray nozzle was installed at 180 cm and 280 cm from the bottom. An aqueous solution reservoir connected with the reactor was installed outside the reactor, and after adjusting the temperature, nutrients and pH conditions in the reservoir, 2 M3 aqueous solution was sprayed through the lower and upper spray nozzles, respectively. In addition, a 25 mm diameter air lift was inserted under the carrier layer in the aqueous solution layer and the height of the pump pipe was adjusted. The height of the lower carrier was intermittently transferred to the 290 cm point of the reaction tank for 20 minutes every 6 hours. To assist, intermittent aeration was carried through the diffuser into the reservoir. After inoculating the aerobic industrial wastewater sludge for the first time in a column carrier, it was reacted at room temperature by flowing 1,000 ppm of benzene gas, respectively, and after 10 days, it was returned to a steady state. . In addition, the 250-day long-term operation showed no pressure loss in the reactor due to sludge deposition on the carrier, and the film remained undetectably thin on the surface of the carrier.

Example 2

A pretreatment tank was further installed in front of the biofilter reactor as used in Example 1. The pretreatment tank was wound by mounting a mat of activated carbon fiber with a thickness of 3 mm in a circular cylinder of 10 cm diameter and 30 cm height, and inserting a corrugated steel sheet to create an air channel with a 5 mm gap between the mats in the flow direction. The temperature of the pre-treatment tank was sprayed 10 liters per hour from the outside to control the pre-treatment tank internal temperature in the range of 20-60 ° C. Removal experiments were carried out while varying the concentration of toluene. After inoculating the industrial wastewater sludge into the carrier of the reactor, the gas was passed through the residence time for 60 seconds, and it took about 10 days to reach a steady state, and when the toluene concentration was changed to 200ppm, 400ppm, 600ppm, The temperature was changed to 60 ° C., 40 ° C. and 20 ° C. corresponding to each concentration. Toluene was increased in steps of 200 ppm in steps of 8 hours and then decreased again. In this case, the removal rate in the biofilter according to the operation method with or without the pretreatment device is as follows. As shown in Table 1, if the pretreatment unit is not operated, the removal rate by the biofilter facility is very low when the inflow concentration changes drastically. This is caused by the microorganisms not responding to the inflow load in a timely manner. When the pretreatment adsorption / absorption device is operated, the removal rate increases rapidly, and the method of changing the temperature change of the pretreatment device in response to the inflow concentration change proposed in the present invention is effective. It is very good and can be applied on site.

Table 1. Removal rate according to whether and how the pretreatment device is operated

 Pretreatment unit operation method  Toluene Removal Rate (%)   Not running 63%   20oC constant temperature operation 87%   Alternating temperature operation according to influent toluene concentration 96%

Example 3

Using only the biofilter system shown in Example 1, the removal experiment was carried out at the residence time of 30 seconds with the mixed gas composition as shown below, and the following results were obtained. It did not occur at all and no pressure drop was observed in the filter bed.

       Odor Gas     Gas concentration (ppm)    Removal rate Trimethylamine        50       95      Benzene       530       99      n-Hexane       380       99

1 is a schematic view showing the structure of the biofilter reactor according to the present invention and the internal circulation method of the carrier and the aqueous solution.

2 is a view showing the shape of the biocarrier with specific gravity adjusted.

3 is a structural diagram of a pollutant gas pretreatment apparatus according to the present invention.

Key Drawing Number Description

1. Contaminated fluid / air inlet piping 2. Adsorption bed

3. Aqueous solution tank 4. Adsorbent

5. Aqueous transfer pump 6. Steam

7. Steam diffuser 8. Aqueous spray nozzle

9. Pretreated fluid / air discharge line

10. Breeding piping device for water level control in reservoir

11. Biofilter Carrier

12. Piping and nozzle for inflow of pretreated fluid / air biofilter part

13. Purified air outlet 14. Air inlet and diffuser

15. Microbial nutrient supply device in reservoir

16. pH adjusting solution supply in reservoir

17. Steam and coolant supply for temperature control in reservoir

18. Aqueous layer level control and external breeding device

19. Pump for transporting carrier under aqueous layer

20. Pump for circulation inside reservoir water solution

21.Biofilter section 22. Pretreatment aqueous solution reservoir

23. Aqueous reservoir tank for air breathing

24. Valve for adjusting top of circulating aqueous solution 25. Valve for adjusting bottom of circulating aqueous solution

26. Nozzle for spraying aqueous solution

Claims (19)

In the biofilter device for removing odor and volatile organic compounds, A reaction tank filled with an aqueous microbial medium solution; It consists of a floating bio-carrier, a portion of the filter layer comprises a self-suspended bio filter layer without a support plate while submerged below the water surface of the aqueous solution, Bio-filter device characterized in that the carrier under the water is transported to the upper portion of the carrier layer and circulated. The biofilter of claim 1, wherein the biocarrier has a specific gravity of 0.01-0.97. The biofilter apparatus of claim 1, wherein the aqueous solution is transferred to the upper portion of the reaction tank and sprayed. The biofilter apparatus according to claim 1, wherein the carrier is transferred using an air lift pump or a slurry pump. The biocarrier of claim 1 or 2, wherein the biocarrier constituting the biocarrier layer is foamed with at least one resin selected from the group consisting of polyethylene, polypropylene, polybutylene, PVC, EVA resin, nylon, polyurethane, and rubber. Or a biofilter device, which is prepared by coating on porous particles. A reaction tank filled with an aqueous microbial medium solution; A biofilter reactor consisting of a floating biocarrier and a part of the filter layer submerged under the water surface of the aqueous solution, including a self-sustained biofilter layer without a support plate, wherein the carrier under the water surface is transported to the upper portion of the carrier layer and circulated; A pretreatment device filled with an adsorbent; And Biofilter system for removing odor and volatile organic compounds including a biofilter reactor, a pretreatment device or an aqueous solution tank connected to both. 7. The biofilter system according to claim 6, wherein the biocarrier has a specific gravity of 0.01-0.97. 7. The biofilter system of claim 6, wherein the biofilter layer is fluidized. 7. The biofilter system according to claim 6, wherein the pretreatment tank is equipped with an adsorptive bed of PPB or honeycomb form made of activated carbon fibers. 7. The biofilter system according to claim 6, wherein in the pretreatment tank, the aqueous solution of the microorganism medium in the upstream is in contact with the contaminating fluid in the upstream. 7. The biofilter system of claim 6, wherein the aqueous solution storage tank includes a temperature controller, a pH controller, and a microbial nutrient supply device. delete a) inlet of contaminated gas / air from a contaminant; Adsorbent bed through which the pollutant is adsorbed while the contaminated fluid passes; Injector for injecting an aqueous solution to the bed; A storage tank for recovering the sprayed aqueous solution and circulating it to the spraying apparatus; And a discharge port of the pretreatment residual liquid; b) a biofilter layer made of a floating biocarrier, the lower portion of which is submerged under the aqueous surface of water and self-suspended; Aqueous solution sleep control and culture piping; A gas supply nozzle installed under the bio filter layer; A pump for circulating the carrier submerged in the aqueous solution together with the solution to the top of the biofilter layer; A storage tank of an aqueous solution in which the carrier is separated; Temperature control of the reservoir; Reservoir aqueous solution circulation pump; Pipe and spray nozzles for spraying an aqueous solution to the top of the biofilter layer and the top of the aqueous solution layer; Biofilter device consisting of the discharge of purified gas / air, c) a reservoir and a supply pump for supplying nutrients of microorganisms to the aqueous reservoir; d) pH control solution reservoir and feed pump to adjust pH of aqueous solution reservoir In the operating method of the odor and volatile organic compound removal biofilter device, The air flow rate in the air lift pump for circulating the carrier submerged in the aqueous solution with the top of the biofilter layer is maintained at 0.3 to 50 m / s. The method of operating a biofilter apparatus according to claim 13, wherein the discharge flow rate in the aqueous solution circulation nozzle is from 0.1 m / s to 10 m / s. The method of operating a biofilter device according to claim 13, wherein the temperature in the bed is finally controlled by controlling the temperature of the aqueous solution reservoir and the flow rate of the aqueous solution circulated upwardly in the reservoir. The method of operating a biofilter apparatus according to claim 15, wherein the biofilter is operated at 0-100 ° C. 15. The method of claim 13, wherein the pretreatment tank is attached to a PPB (parallel passage bed) bed or corrugated mesh in which the adsorbent in the adsorption bed is attached to a spacer between mats or felts in which the woven carbon fibers are woven so that an air passage at a predetermined interval exists. And piled up or rolled up to form a honeycomb-shaped air channel, thereby reducing the pressure drop of the fluid in the bed. delete delete

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