KR100510864B1 - Bio trickling filter system - Google Patents

Abstract

The present invention relates to a bio-trickle filtration apparatus, and a porous carrier, which is a medium of microorganisms, is stacked in multiple stages inside a housing, and an injector for injecting a mixed solution in which neutralizer and nutrients are mixed with water is installed at the top, and a polluted gas. A bio trickling filtration tower having a gas inlet through which a pollutant gas discharged from a discharge source is introduced is provided at the upper end of the housing, and a gas outlet through which a gas from which odors and VOCs have been removed is provided at the lower end thereof. Contamination gas inlet means for conveying the polluting gas to the bio trickling filter tower, neutralizing agent and nutrient mixing supply means for supplying the bio trickling filter tower with neutralizer and nutrients mixed with water, and mixing the neutralizer and nutrients Neutralizing agent supply means for supplying a neutralizing agent to the supplying means; And nutrient supply means for supplying nutrients to the nutrient mixing supply means, and water supply means for supplying water from the water supply source to the sprinkling tank. Since the bio trickling filter according to the present invention uses a porous carrier having many fine pores, the pressure loss is low, and the life of the carrier is long since the carrier is not decomposed by microorganisms. In addition, because of the high delivery rate for oxygen and materials and low residence time, the odor removal efficiency is high and the area required for installation is small. In addition, by artificially supplying the pH and appropriate nutrients, the odor removal efficiency is high, the median is semipermanent (more than 15 years) and the pressure loss (20 ~ 30mmAq) is low, the maintenance cost is low. Moreover, it is easy to operate with an automated system, has excellent ability to cope with problems, has high reliability in processing facilities, and performs odor measurement all by direct functional method, air dilution functional method, and instrumental analysis method defined by current environmental conservation law. In addition, all-factor measurement, which adopts air dilution sensory method in developed countries, can control the odor that does not appear in GC.

Description

Bio trickling filtration device {BIO TRICKLING FILTER SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bio trickling filtration apparatus, and in particular, odor and volatile organic compounds (VOCs) by bio-trickling technique, which is a biological treatment method using a porous foam, polyurethane foam. It relates to a bio trickling filtration device that is a high-treatment process for processing.

In general, conventional biofilters use humidity control and microbial decomposition, and in particular a humidifier is essential, and the filling is to use microorganisms naturally present in urban garbage, hay, bushes, bark, compost, porous clay, and the like.

In addition, the process control is to control the moisture, temperature, dust, and in particular, since the biomass control uses back washing or physical stirring, a large amount of wastewater for frequent breakage or back washing of the stirring shaft is generated, resulting in excessive treatment costs.

Such conventional biofilters are suitable for intermittent operation and are inexpensive because media can be easily obtained from nature, but a humidifier is required for humidity control. In addition, pretreatment equipment is required, it is unsuitable for acid gas treatment, high pressure loss (100mmAq), and carriers need to be replaced every 6 to 24 months. . In addition, over time, the carrier is damaged, the specific surface area is reduced, there is a difficulty in selecting a media replacement time, and the maintenance cost is high due to excessive wastewater treatment costs for biomass control.

In addition, since the organic carrier is used, the organic matter is decomposed by the microorganism, so that the pressure loss is high, the moisture control is difficult, the deodorization efficiency is low, the equipment size is large, and the maintenance is difficult. In addition, the surface area, the pore size, etc., the efficiency is low and the residence time is high.

The present invention has been devised to solve the above-mentioned problems and defects as described above, using a porous foam (polyurethane foam) as a biological treatment bio-trickling (bio-trickling) technique odor And it is an object to provide a bio-trickle filtration device that is a highly processing process for treating volatile organic compounds (VOCs).

In order to achieve the above object, the bio trickling filtration apparatus according to the present invention has a porous carrier, which is a medium of microorganisms, is stacked in multiple stages in a housing, and an injector for injecting a mixed solution of neutralizer and nutrient mixed with water is provided at the top. And a bio trickling filter tower having a gas inlet through which a polluted gas discharged from a polluted gas discharge source is introduced, and a gas outlet through which a gas from which odors and VOCs are removed are discharged from the lower end, and the pollution Contaminant gas inlet means for conveying the pollutant gas generated from the gas discharge source to the bio trickling filter tower, Neutralizer and nutrient mixture supply means for supplying a mixture of neutralizing agent and nutrients to the bio trickling filter tower water; Neutralizing agent for supplying neutralizing agent to the neutralizing agent and nutrient mixture supply means It is configured to include the water end, and nutrient supply means for supplying nutrients to the mixture a neutralizing agent and nutrient supply means, water supply means for supplying water from the water supply source to said spring cycling tank.

The bio trickling filtration tower is provided with a gas inlet for introducing polluted gas on one side, a gas outlet for discharging the treated exhaust gas, a circulation port through which water and nutrients are circulated, and an inside of the housing provided with a discharge port. A support frame is formed at the bottom, and a porous carrier such as an inert polyurethane carrier, which is a medium for microorganisms, is stacked on the support frame, and an injector for supplying water and nutrients is installed thereon.

The porous carrier is formed in a rectangular block shape in which the lower block and the upper block are uniformly stacked in multiple stages, and the upper block is smaller in size and has fewer steps than the lower block.

Such a present invention is a system for decomposing and removing organic substances by oxidation and reduction of microorganisms, which can be conceptually expressed as follows.

That is, the air dilution function (olfactometer) is a biological treatment process through a bio-trickling filter, a nutrient supply device, and a chemical injection device through a pretreatment process for maintaining dust, temperature, humidity, and pH suitable for microbial treatment. As a technique to treat odors by culturing and inoculating appropriate microorganisms and efficiently contacting odor gas (gas) in order to treat more than 90% of odor treatment efficiency based on outlet or less than 500OU / s㎥ after treatment. Solving odor problems in tobacco manufacturing plants, food waste treatment plants, sewage and wastewater treatment plants, treating ethanol and toluene in the printing and coating industries, and methane and form in the chemical, pharmaceutical, semiconductor, food and paper industries It is a technology that can be applied to the treatment of hydrocarbons such as aldehydes to deal with odors and VOCs that are the subject of complaints.

The present invention is a process for capturing the gas by applying a hood system suitable for the equipment, the process of moving the gas to the suction pressure display and damper device to adjust the suction amount per line, gas cooling device and differential pressure Pretreatment process by spray tower with low dust removal and temperature control, biological treatment process that makes biomass control simple without back washing or physical agitation using inert polyurethane foam carrier It includes the main process.

In addition, the present invention is to install a stack and odor diffusion modeling program in consideration of the diffusion to collect and analyze real-time meteorological phenomena data, and to systemize environmentally friendly workplace management by real-time odor movement path management and analysis It is advantageous to

As described above, the present invention provides a technique using polyurethane foam as a method of treating odors and VOCs, a technique of supplying nutrients to culture microorganisms on polyurethane foam, and control of temperature and dust. It features the technology using a two-stage nozzle-type spray tower, which is a pretreatment facility, and collects and analyzes real-time weather phenomenon data by using an odor diffusion modeling program, and manages and analyzes odor movement paths in real time. This technique is suitable for applying the technology to the system.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail as follows.

1 to 8 is a view showing a bio trickling filtration device according to the present invention, Figure 1 is a schematic block diagram showing a pollutant gas treatment process of the bio trickling filtration device, Figure 2 is a main configuration of the bio trickling filtration device And a block diagram showing the action, respectively, FIG. 3 is a plan view showing an embodiment of the bio trickling filter tower, FIG. 4 is a partially cutaway front view showing an embodiment of the bio trickling filter tower, and FIG. Side views showing an embodiment of the trickling filtration tower are shown with the outer shell removed, respectively.

Referring first to Figure 1, the bio trickling filtration process according to the present invention is a odor generated from the pollutant gas discharge source 10, such as various manufacturing plants (10a, 10b) to discharge the pollutant gas while manufacturing tobacco, chocolate, etc. And contaminant gases including VOCs are collected to remove dust while passing through the bag filter 12 and through the cyclone 13, followed by a spray tower 14 and a cooling tower ( 15) in the pretreatment facilities such as gas-liquid contact and particulate matter is removed and heat exchange is carried out, and then flows into the bio-trickle filtration tower 100 is processed, and after the odor and VOCs are removed proceeds to the process to discharge to the stack do.

In FIG. 1, 20 is a fan and 21 is an induced draft fan (ID FAN).

Hereinafter, referring to FIGS. 1 and 2, in the bio-trickle filtration apparatus according to the present invention, a porous carrier 120, which is a medium for microorganisms, is stacked in multiple stages in a rectangular housing 110, and a neutralizing agent and a nutrient are mixed with water. The injector 130 for injecting the mixed liquid is installed on the upper portion, and the gas inlet 111 through which the polluted gas discharged from the polluted gas discharge source 10 is provided is provided at the upper end of the housing 110, and odors and VOCs are The bio trickling filter tower 100 having a gas outlet 112 through which the removed gas is discharged is provided at a lower end thereof, and the bio trickling filtration of the polluted gas generated from the polluted gas discharge source 10. Pollutant gas inlet means (100a) for transferring to the tower 100, neutralizer and nutrient mixture supply means (100b) for supplying the neutralizing agent and nutrients to the bio-trickle filtration tower 100 by mixing with water, Neutralizer supply means (100c) for supplying the neutralizing agent to the neutralizer and nutrient mixture supply means (100b), Nutrient supply means (100d) for supplying nutrients to the neutralizer and nutrient mixing supply means (100b), and the spring It is configured to include a water supply means (100e) for supplying water to the kling tank 400 from the water source 700.

Hereinafter, referring to FIGS. 1 to 6, the bio trickling filtration tower 100 includes a gas inlet 111 through which a contaminated gas is introduced at one side thereof, and a gas outlet 112 at which a treated exhaust gas is discharged below. ) And the support port 140 is formed in the inner lower end of the rectangular housing 110 is provided with a circulation port 113, the water outlet and the nutrients 114, the microorganism is formed on the support frame 140 A porous carrier 120 made of inert polyurethane material inoculated and cultured is stacked and an injector 130 for supplying water and nutrients is installed thereon.

As shown in the figure, the porous carrier 120 has a rectangular block shape, and the lower block 121 and the upper block 122 are uniformly stacked in multiple stages, and the upper block 122 is disposed on the lower block 121. It is composed of small size and small number of layers (for example, about 1/5).

The injector 130 has a plurality of nozzle pipes 132 are connected to a straight distribution pipe 131 is fixed to the upper side of the housing 110, a plurality of nozzles 133 are coupled to each nozzle pipe 132, respectively, The top of the porous carrier 120 is configured to evenly spray water and nutrients as a whole.

The pollutant gas inlet means 100a is a bag filter 12 and a cyclone that removes dust and the like from polluted gas discharged from the pollutant gas discharge source 10 such as various manufacturing plants 10a and 10b that discharge polluted gas. Dust collecting means as shown in (13), blower means such as a cooler 210 and a heater 220 provided to control the temperature of the polluted gas, a fan 20, a manned blower 21 for conveying the polluted gas, etc. 230 is configured to be coupled in series to the gas inlet pipe 101, one end of which is connected to the gas inlet 111 of the bio-trickle filtration tower 100.

The neutralizer and nutrient mixture supply means (100b) is the supply pipe 401 is connected to the upper end of the sprinkling tank 400 and the inlet end of the injector 130 of the bio trickling filter tower 100 to pump the pump (P) Power to supply the injector 130 with a mixed solution of the neutralizer and nutrients mixed with water.

In addition, a circulation pipe 103 is connected between the circulation port 113 provided at the lower end of the bio trickling filtration tower 100 and the upper end of the sprinkling tank 400 to be recovered from the bio trickling filtration tower 100. The mixed liquid is recovered and reused as necessary for the sprinkling tank 400 by the pumping force of the pump P.

The neutralizing agent supply means (100c) and nutrient supply means (100d) for supplying the neutralizing agent is a supply pipe 501, (601) between the upper end of the neutralizing tank 500 and the nutrient tank 600 and the sprinkling tank 400 ) Is connected to supply the neutralizing agent and nutrients to the sprinkling tank 400 by the pumping force of the pump (P), respectively.

The water supply means 100e is configured to supply water with a pumping force of the pump P by connecting a supply pipe 701 between the water supply source 700 and the sprinkling tank 400.

The present invention includes a spray tower (14) and a cooling tower (15) as necessary to cool the contaminated gas, water, and neutralizer to an appropriate temperature, remove dust, adjust pH, and the like. And a pretreatment device 300 for supplying humidity control and the like, and the pretreatment device 300 is selectively applied according to the conditions of the treatment plant.

In addition, the supply pipe 301 is connected between the upper end of the pretreatment device 300 and the cooler 210 and the heater 220 to cool the contaminated gas, if necessary, is supplied to the gas inlet pipe 101, The supply pipe 702 having one end connected to the water supply pipe 701 is connected to the pretreatment device 300 to supply water, and the supply pipe 502 having one end connected to the neutralizer supply pipe 501 is connected to the pretreatment device 300. The neutralizing agent is configured to be supplied.

And, the present invention is one side of the sprinkling tank 400 is connected to the circulation pipe 402, the contents of the sprinkling tank 400 is circulated by the pumping force of the pump (P) to prevent precipitation, etc. It is intended to be mixed.

In addition, the acidity measurement sensor 410 is connected to the circulation pipe 402, the acidity signal detected by the acidity measurement sensor 410 is applied to the controller and the microcomputer pumps the pump P of the neutralizer tank 500. By controlling, the supply amount of the neutralizing agent is controlled.

In addition, an integrated flowmeter 710 is connected to the water supply pipe 701, and a flow signal measured by the integrated flowmeter 710 is applied to the controller, and the microcomputer controls the pump P of the nutrient tank 600. The supply amount of is configured to be controlled.

Referring to the operation of the bio trickling filtration device according to the present invention as described above is as follows.

The pollutant gas discharged from the various manufacturing plants 10a and 10b passes through the dust collecting means such as the bag filter 12 and the cyclone 13, the cooler 210 and the heater 220, and removes dust. While being maintained at the temperature is blown by the blowing means 230, such as the fan 20, the manned blower 21 is introduced into the interior through the upper gas inlet 111 of the bio trickling filtration tower 100.

In addition, the bio trickling filtration tower 100 is supplied with a mixture of water, neutralizing agent and nutrient supplied from the sprinkling tank 400 through the upper injector 130.

The pollutant gas that has passed through the filter 200 is transferred to the pretreatment device 300 when it is necessary for maintaining the temperature, cooled, and then supplied to the bio trickling filtration tower 100.

In addition, the water supplied from the water supply source 700 and the neutralizer supplied from the neutralizer tank 500 are also transferred to the pretreatment device 300 when cooled to maintain the temperature, and then cooled to the bio trickling filtration tower 100. Supplied to.

The sprinkling tank 400 is artificially mixed according to the type of gas processed by the neutralizer supplied from the neutralizer tank 500, the nutrients supplied from the nutrient tank 600, and the water supplied from the water supply source 700. The mixture is sprayed by the injector 130 and supplied to the bio trickling filtration tower 100.

In addition, the neutralized liquid passing through the bio trickling filtration tower 100 is circulated to the sprinkling tank 400 through the circulation port 113, the water, neutralizing agent and nutrients in the sprinkling tank 400 The mixed liquid is pumped by the pump P periodically or intermittently and circulated to the circulation pipe 402 to be evenly mixed.

Then, the pump P of the nutrient tank 600 is controlled according to the flow rate measured by the cumulative flow meter 710 installed in the water supply pipe 701 to adjust the nutrient supply amount, and the acidity installed in the circulation pipe 402. The signal sensed by the measuring sensor 410 is transmitted to the pump P of the neutralizing liquid supply pipe 501 of the neutralizing tank 500 to adjust the supply amount of the neutralizing agent.

The polluted gas introduced into the gas inlet 111 of the bio trickling filtration tower 100 passes through the porous carrier 120 stacked inside the housing 110 by a pumping force in the direction of an arrow shown in FIG. 4. Odor and VOCs are removed by the microorganisms inhabiting the porous carrier 120.

The inside of the bio trickling filtration tower 100 is supplied with an inlet gas that is adjusted to an appropriate temperature, a neutralizer and a nutrient are supplied to maintain an appropriate environment and nutrition for incubating microorganisms attached to the porous carrier 120, Exhaust gas from which odor and VOCs are removed through the bio trickling filtration tower 100 is discharged into the atmosphere through the stack 800.

Nutrient for the microorganisms inhabiting the porous carrier 120 contains a large amount of inorganic nutrients necessary for the metabolism of the microorganism, in addition to N, P, K, and the supply and consumption of NH ₄ ⁺ (ammonium) By measuring and maintaining the differential pressure in the state having the optimum efficiency, the best odor removal efficiency is kept constant.

The amount of ammonium supplied and consumed is 70 mg / l of ammonium introduced and the concentration of ammonium discharged: 20 mg / l, so that the differential pressure applied to the filter layer is 20-30 mmAq. By mixing 3 L per water and spraying with a bio trickling filter, it is possible to maintain a constant differential pressure and optimum efficiency.

FIG. 6 is a plan view showing another embodiment of the bio trickling filter tower, FIG. 7 is a partially cutaway front view showing another embodiment of the bio trickling filter tower, and FIG. 8 is a view of the bio trickling filter tower. A side view is shown showing another embodiment with the outer shell removed.

In one embodiment of the bio trickling filtration tower according to the present invention shown in FIGS. 3 to 5, the housing 110 is formed in a rectangular shape, and the porous carrier 120 is stacked inside the rectangular housing 110. Although the distribution pipe 131 of the injector 130 is configured to have a straight shape, another embodiment of the bio trickling filtration tower illustrated in FIGS. 6 to 8 has a housing 110 having a cylindrical shape, and the cylindrical shape The porous carrier 120 is stacked inside the housing 110, and the distribution pipe 131 of the injector 130 is formed in an arc shape. And other configurations and actions are as described above.

In the drawing, 150 in FIG. 4 shows an answer plate installed so that the operator can climb on the bio trickling filtration tower and perform necessary work such as inspection and repair, and 160 in FIGS. 7 and 8 shows a confirmation window.

In addition, in the above description, the bio trickling filtration tower has been described by way of example in the form of one stage in the drawing. However, in implementing the present invention, two or more stages may be installed and implemented.

As described above, the bio trickling filter according to the present invention uses a porous carrier made of an inert polyurethane material having a lot of fine pores, so the pressure loss is low, and the life of the carrier is long because the carrier is not decomposed by microorganisms. In addition, because of the high delivery rate for oxygen and materials and low residence time, the odor removal efficiency is high and the area required for installation is small. In addition, since the pH and appropriate nutrients are artificially controlled to supply the amount of water mixed, the odor removal efficiency is high, and the median is semipermanent (more than 15 years) and the pressure loss (20 ~ 30mmAq) is low, so the maintenance cost is low.

Moreover, it is easy to operate with an automated system, has excellent ability to cope with problems, has high reliability in processing facilities, and performs odor measurement all by direct functional method, air dilution functional method, and instrumental analysis method defined by current environmental conservation law. In addition, air dilution sensory method is an all-factometer measurement adopted by developed countries to control the odor that does not appear in GC.

However, it is not suitable for insoluble gases that are insoluble in water.

1 to 8 is a view showing a bio trickling filtration device according to the present invention,

1 is a schematic block diagram showing a pollutant gas treatment process of a bio trickling filtration apparatus.

Figure 2 is a block diagram showing the main configuration and operation of the bio trickling filtration device.

3 is a plan view showing one embodiment of a bio trickling filtration tower.

4 is a partially cutaway front view of an embodiment of a bio trickling filter tower.

Figure 5 is a side view showing an embodiment of the bio trickling filter tower with the outer shell removed.

6 is a plan view showing another embodiment of the bio trickling filter tower.

Fig. 7 is a partially cutaway front view showing another embodiment of the bio trickling filter tower.

Figure 8 is a side view showing another embodiment of the bio trickling filter tower with the outer shell removed.

<Description of the symbols for the main parts of the drawings>

10: exhaust gas discharge source 10a, 10b: manufacturing plant

12 bag filter 13 cyclone

14: spray tau 15: cooling tau

20: fan 21: manned blower

100: bio trickling filtration tower 110: housing

100a: contaminant gas inlet means 100b: neutralizer and nutrient mixture supply means

100c: neutralizer supply means 100d: nutrient supply means

100e: water supply means 111: gas inlet

112: gas outlet 113: circulation port

114: outlet 120: porous carrier

121: lower block 122: upper block

130: injector 131: distribution pipe

132: nozzle tube 133: nozzle

140: support frame 200: filter

210: cooler 220: heater

230: blowing means 300: pretreatment device

400: sprinkling tank 500: neutralizer tank

600: nutrient tank 700: water source

800: stack

Claims (10)

delete delete Bio trickling filtration tower 100, in which a porous carrier 120 made of inert polyurethane material, inoculated and cultured by microorganisms is inoculated and cultured on the lower support frame 140 inside the housing 110, and pollution to discharge polluted gas. The pollutant gas inlet means 100a for removing dust from the polluted gas discharged from the gas discharge source 10 and controlling the temperature of the polluted gas to supply the gas inlet 111, and the porous carrier 120 made of the inert polyurethane material. Neutralizer and nutrient mixture supply means for supplying and spraying a mixed solution mixed with water to neutralizer and nutrient for controlling the growth of microorganisms inhabiting to the injector 130 installed on the bio trickling filter tower 100 In the bio trickling filtration device comprising a (100b), the porous carrier 120 has a rectangular block shape of the lower block 121 and the upper block 122 in multiple stages. Bio-trickle filtration device is laminated, characterized in that the upper block (122) is smaller than the lower block 121 and composed of fewer steps. delete delete delete delete delete delete delete