KR101451598B1 - deodorizing apparatus and method including pretreatment and posttreatment device in the biofilter way - Google Patents

Abstract

The present invention relates to an eco-friendly deodorizing device including a pre-treatment part and a post-treatment part sequentially installed and a deodorizing method using the same. The purpose of the present invention is to allow for the reduction of odorous gas through pre-treatment water that contains a sodium hydroxide solution, the continuous decomposing and removal of the odorous gas through a bio-filter and removal of a residual odor through post-treatment water that contains a sodium hypochlorite solution, thereby efficiently removing a high-concentration acidic odor. A deodorizing device using a bio-filter part of the present invention, which comprises: a pre-treatment part installed at the front end of the bio-filter part, removing the particle material that is contained in an odorous gas flowing into the inside thereof through a suction fan, using an alkali washing in the pre-treatment water containing a sodium hydroxide solution, and thus reducing an acidic concentration of the odorous gas; a bio-filter part decomposing and removing, through a microbe, the odorous gas reduced in the acidic concentration in the pre-treatment part, which flows therein; and a post-treatment part installed on a rear end of the bio-filter part, removing, through post-treatment water containing a sodium hypochlorite solution, a residual odor of the gas from which the odor is removed through the bio-filter part, and an odor generated in the bio-filter part, which flows therein, and discharging the treated odor. The pre-treatment part, the bio-filter part and the post-treatment part are installed such that the processes are continuously performed, thereby efficiently removing a high-concentration of acidic odorous gas and preventing secondary environmental pollution.

Description

[0001] The present invention relates to an eco-friendly biofilter-type deodorization apparatus in which a pretreatment unit and a post-treatment unit are continuously provided, and a deodorizing apparatus and method including the same.

The present invention relates to an eco-friendly biofilter-type deodorization apparatus in which a pre-treatment section and a post-treatment section are continuously provided, and a deodorization method using the same, wherein a pretreatment section with sodium hydroxide and a sodium hypochlorite , The treatment efficiency of the high concentration acidic odor gas is improved and the secondary environment problem due to the discharge of the pretreated water and the posttreatment water through the limitation of the chemicals of the pretreated water and the posttreated water The present invention relates to an eco-friendly bio-filter type deodorization apparatus in which a pre-treatment section and a post-treatment section that can be improved are continuously provided, and a deodorization method using the same.

The odor components generated in sewage treatment plants, pig farms, livestock wastewater treatment plants, slaughterhouses, food factories, and various chemical plants vary widely in composition of pollutants depending on the source and source of the pollutants. Major odor inducing substances include hydrogen sulfide and mercaptan Sulfur compounds, nitrogen compounds such as ammonia and amines, and volatile organic compounds (VOCs) or volatile sulfur compounds including benzene, toluene, ethylbenzene, and xylene.

The above-mentioned odorous components are generally converted into water and carbon dioxide, and are generally removed. The odor gas treatment techniques currently used include physicochemical deodorization such as activated carbon absorption, chemical solution cleaning, ozone oxidation, and combustion deodorization And a biological deodorization method such as a soil microorganism treatment method, aeration tank deodorization method, and a biofilter.

However, the activated carbon adsorption method is not economical because the expensive activated carbon should be replaced regularly, and the chemical liquid washing method requires excessive operation cost due to excessive consumption of the chemicals, and secondary pollutants are generated. The ozone oxidation method oxidizes and decomposes a malodorous component by utilizing an oxidation action by ozone, but has a problem of residual ozone due to a deodorization method which uses a concealing effect by ozone itself. Combustion deodorization generates secondary air pollution.

Among the biological deodorization methods, the soil microbial treatment and the aeration tank deodorization method are disadvantageous in that the total system pressure loss is high and the amount of waste gas that can be treated per unit area of the apparatus is very small. Therefore, the biofilter technology which is less economical than the other deodorization method and has a low initial investment cost and operation ratio and is easy to treat various odors and volatile organic compounds and does not generate secondary pollutants after treatment is widely used .

A biofilter is a method in which a microorganism attaches to a surface of a carrier to form a biofilm, and when contaminated air containing odor and VOCs is passed through a carrier layer and a contaminant is diffused into a biofilm, the microorganism decomposes and removes contaminants.

In the conventional odor treatment process using a biofilter, pretreatment such as humidification, removal of particulate matter, and temperature control is performed through a pretreatment facility before decomposing and removing odor gas introduced from a suction fan into microorganisms. Then, through the deodorization facility composed of the biofilter, the treatment such as the equalization of the inflow gas, the removal of the odor, the cultivation of the deodorizing microorganism, and the like are finally performed.

These biofilter odor treatment methods can be applied to a wide range of odors from low concentration to high odor and complex odor. However, there is a tendency that a high concentration of hydrogen sulfide (H ₂ S) and an acidic odor such as methylmercaptan The pH is rapidly lowered due to the metabolic action of the microorganisms, thereby affecting the activity of the microorganisms, thereby inhibiting the degradation efficiency of the microorganisms and causing mortality of the microorganisms. If such a state is maintained for a long time, There is a drawback that it can lead to deterioration.

Accordingly, a device for adjusting the pH of the inflowing odor may be installed by pretreatment of the acid alkali component introduced into the deodorizing device so that the microorganisms decomposing the odor component can decompose the odor component under the optimum environmental condition.

The pretreatment device in the malodor processing method using the biofilter as described above adds an acid alkali component to the treated air, so that the acid alkali component remains in the air discharged from the treatment device and the drain water, have. Further, there is a disadvantage that odor due to sludge and circulating water unique to the biofilter occurs.

Patent Registration No. 10-1056064 (Aug. 4, 2011) Korean Patent Registration No. 10-1009339 (Jan. 19, 2011) Korean Patent Laid-Open Publication No. 2003-0088226 (November 19, 2003) Korean Patent Publication No. 10-2012-0002074 (2012.01.05)

An object of the present invention is to provide a method and apparatus for reducing odor gas by pretreated water containing an aqueous solution of sodium hydroxide, decomposition and removal of odorous gas by the biofilter, and removal of residual odor by post-treatment water containing sodium hypochlorite aqueous solution The present invention also provides an eco-friendly biofilter-type deodorization apparatus in which a pre-treatment section and a post-treatment section capable of efficiently removing high-concentration acidic odors are continuously provided, and a deodorization method using the same.

It is a further object of the present invention to provide a cleaning agent which is applied to the pretreatment unit and the posttreatment unit to limit the chlorine gas generated by washing the sodium hypochlorite aqueous solution of the posttreatment unit and the reaction of the sodium hydroxide aqueous solution component of the pretreatment unit introduced into the posttreatment unit Friendly biofilter-type deodorization apparatus in which a pre-treatment section and a post-treatment section are continuously provided so that an aqueous solution of sodium hypochlorite is produced by an external water supply device .

It is still another object of the present invention to provide a pretreatment unit capable of preventing secondary environmental pollution caused by pretreatment water and posttreatment water that can not be circulated after the deodorization operation and discharged to the outside through the limitation of the cleaning chemicals applied to the pretreatment unit and the post- And a deodorization method using the bio-filter deodorization apparatus.

The present invention relates to a deodorization apparatus using a biofilter unit, The particulate matter contained in the odor gas flowing into the interior of the biofilter unit through the suction fan is removed through alkaline cleaning with pretreatment water containing an aqueous solution of sodium hydroxide to remove the acidic concentration of the odor gas A preprocessing unit for reducing the amount of air; A biofilter unit into which odorous gas having a reduced acid concentration is introduced into the pretreatment unit and is decomposed and removed by microorganisms; The residual odor of the gas from which the odor has been removed and the odor generated in the biofilter are introduced through the biofilter to be removed by the post-treatment water containing the sodium hypochlorite aqueous solution, Processing unit,

Wherein the pretreatment unit, the biofilter unit, and the post-treatment unit are formed in a continuous process,

The high concentration acidic odor introduced by the suction fan is stepwise reduced and removed by the pretreated water containing the sodium hydroxide aqueous solution of the pretreatment portion, the microorganism of the biofilter portion and the post-treatment water containing the sodium hypochlorite aqueous solution of the post-

The sodium hydroxide component in the pretreatment water that can not be removed through the pretreatment unit and the biofilter unit and flows into the post-treatment unit reacts with the chlorine gas generated by the sodium hypochlorite aqueous solution of the post-treatment unit to generate an aqueous sodium hypochlorite solution, So that the emission of the component is blocked.

The present invention relates to a malodor gas inflow step in which malodor gas is introduced into a pretreatment tank of a pretreatment section by a suction fan; A pretreatment step in which, when the malodor gas introduced into the pretreatment tank is an acidic odor, it is alkaline cleaned with pretreatment water containing an aqueous solution of sodium hydroxide to reduce acidic odor concentration at a high concentration; A microbial deodorization step in which, after the pretreatment step, the malodor gas introduced into the biofilter section is decomposed and removed by the microorganisms; After the microbial deodorization step, the residual odor of the gas flowing into the post-treatment section, the sludge odor generated in the biofilter section and flowing into the post-treatment section, and the odor of the circulating water are removed by the post-treatment water containing sodium hypochlorite aqueous solution Processing step is continuously performed,

The pre-treatment water containing the sodium hydroxide aqueous solution in the pretreatment step, the microorganisms in the microbial deodorization stage, and the post-treatment water containing the sodium hypochlorite aqueous solution in the post-treatment stage, Abatement and removal,

The sodium hydroxide aqueous solution component in the pretreatment water that can not be removed through the pretreatment unit and the biofilter unit and reacted with the chlorine gas generated by the aqueous solution of sodium hypochlorite in the post-treatment unit to generate sodium hypochlorite aqueous solution, So that the discharge of the sodium component is blocked.

A pretreatment unit for cleaning the acidic odor gas with pretreatment water containing an aqueous solution of sodium hydroxide at the tip and a rear end of the biofilter unit where decomposition and removal of the odor by the microorganism is performed; And a post-treatment section in which residual odor generated in the gas and various odors generated in the biofilter are removed by post-treatment water containing an aqueous solution of sodium chlorate are connected and connected to the biofilter section so as to perform a continuous process, And the odor of high concentration can be efficiently removed by the continuous three-stage odor removing process of the odor treating unit and the post-treating unit.

In the present invention, the sodium hydroxide aqueous solution in the pretreatment section is used as the pretreatment water, and the sodium hypochlorite aqueous solution is used as the post-treatment water in the post-treatment section, and is introduced into the post-treatment section through the pretreatment section and the bio- The sodium hydroxide component in the pretreated water reacts with the chlorine gas generated by the sodium hypochlorite aqueous solution during the washing of the post-treatment section, and the sodium hydroxide component is again returned to the sodium hypochlorite aqueous solution, so that the discharge of the sodium hydroxide component to the outside can be blocked.

In the present invention, since the droplet generated by the aqueous solution of sodium hypochlorite and the aqueous solution of sodium hydroxide is separated and collected by the demister provided at the discharge portion, the efficiency of blocking the external discharge of the cleaning agent through the discharge portion is increased.

The present invention relates to a biofilter which is provided so that a post-treatment section is formed in a continuous process at a rear end of a biofilter section where malodor decomposition and removal is performed by microorganisms, Since the odor generated in the water is removed and discharged together with the odor of the gas in the post-treatment section, the odor efficiency with respect to the exhaust gas is increased and the environmental pollution due to the odor of the exhaust gas can be prevented.

In the present invention, the acidic odor of high concentration is primarily reduced by the alkaline cleaning method using the aqueous solution of sodium hydroxide in the pretreatment section, and the odor removal rate due to the rapid pH change of the odor introduced into the biofilter unit can be prevented And it is possible to prevent the impact load of the microorganisms due to the concentration of the odor introduced into the biofilter unit, thereby maintaining stable deodorization efficiency.

Further, the present invention includes a pretreatment section for reducing the acidic concentration of the malodor gas by an aqueous solution of sodium hydroxide, so that the odor retention time within the biofilter section is greatly reduced (the retention time of about 8 to 15 seconds is 5 to 10 seconds In case of the biofilter, it is necessary to adapt the microorganism according to the characteristics and concentration of the incoming odor during the first operation. However, in case of introducing the high concentration of odor, it is firstly reduced by the pretreatment means. It is possible to greatly reduce the acclimatization period.

In the present invention, an aqueous solution of sodium hydroxide used in the pretreatment unit and an aqueous solution of sodium hypochlorite used in the post-treatment unit are simultaneously produced and supplied by electrolysis, and a separate facility for producing each cleaning chemical is provided Not only does this reduce the overall cost of equipment, but it also provides a more stable supply of cleaning chemicals.

In the present invention, the alkaline water used in the pretreatment section is limited to the sodium hydroxide aqueous solution, and the oxidizing agent used in the post-treatment section is limited to the sodium hypochlorite aqueous solution,

The pretreated water and the post-treated water discharged from the pretreatment unit and the post-treatment unit are mixed with the low-concentration aqueous hydrogen chloride solution in the treated water discharge unit to be discharged in the form of an aqueous sodium chloride solution harmless to the human body. Secondary environmental pollution due to chemicals in the post-treatment water can be prevented, and environmental problems due to residual chemical components can be improved at low cost.

In addition, since the sodium chloride aqueous solution produced in the treated water discharging portion can be supplied to the medicine producing and supplying portion and reused for the production of the aqueous sodium hydroxide solution and the sodium hypochlorite aqueous solution, the production and supply of the cleaning chemical can be smoothly performed .

1 is a schematic diagram showing a configuration according to the present invention.
Figure 2 is an exemplary block diagram illustrating the overall flow according to the present invention.
3 is an exemplary diagram showing the configuration of polling according to the present invention.
4 is an exemplary diagram showing the configuration of a medicine production and supply unit according to the present invention.
5 is an exemplary view showing the configuration of the process water discharging portion according to the present invention

In the natural world, there are many smell and decomposition strains of VOCs. These microorganisms are variously reproduced by the operation conditions of the apparatus such as the odor and VOCs, such as composition, concentration, loading, substrate, temperature, pH, moisture, .

In biofilter, immobilized microorganisms cause decomposition of odor and VOCs.

Odorous substances (hydrogen sulfide, ammonia, methyl mercaptan, sulfur oxides, amines) + microorganisms

→ CO ₂ + H ₂ O + microorganisms + inorganic salts (sulfate, nitrate)

VOCs + microorganisms → CO ₂ + H ₂ O + microorganisms

(1) Biological removal mechanism of ammonia gas

The mechanism by which ammonia (NH ₃ ) is biologically removed is largely divided into bacterial assimilation, bacterial dissimilation, nitrification and denitrification. . Nitrification occurs primarily by autotrophic or mixotrophic microorganisms, and ammonium is transported through nitrite nitrogen to nitrate nitrogen in two steps.

Nitrosomonas europaea has been known to be involved in the oxidation of ammonium in the nitrification process and Nitrobacter agilis has been known to be involved in the oxidation of nitrite nitrogen.

The first step in ammonium oxidation is the oxidation of ammonia (NH ₃ ), not ammonium (NH ₄ ⁺ ), due to the membrane-bound ammonia mono-oxygenase (AMO) endothermic reaction. The electrons necessary for this reaction are known to be supplied from the ubiquinone-cytochrome b of the electron transport system.

Hydroxylamine (NH ₂ OH) is oxidized to nitrite nitrogen by hydroxylamine oxidoreductase (HAO) and is an exothermic reaction. The nitrite nitrogen is oxidized to nitrate nitrogen by nitrite oxidoreductase and is reversible.

NH ₃ + O ₂ + 2H ⁺ + 2e ^- ? NH ₂ OH + H ₂ O? G? = 17 kJ / mol

NH ₂ OH + H ₂ O → NO ₂ ^- + 5H ⁺ + 4e ^-

NO ₂ ^- + H ₂ O ^- > NO ₃ ^- + 2H ⁺ + 2e ^-

However, recently, Hiorns et al. (1995) investigated the types of nitrifying microorganisms in a real system using a 16S rDNA gene probe. In general, Nitrosospira is the most abundant ammonium oxidized microorganism species Nitrosomonas is only measurable when cultured in the laboratory.

(2) Biological removal mechanism of hydrogen sulfide gas

In the reduced sulfur compounds, various microorganism groups which can grow organic and inorganic nutrition exist in nature, and they have a characteristic of oxidizing sulfur components to obtain the energy required for growth.

Thiobacillus, Thiosphaera, Thiomicrospira, Thermothrix, Beggiatoa and Sulfolobus have been cultivated mainly among the sulfated bacteria. Among them, various sulfur compounds are used as substrates and grown in a wide range of pH and temperature. The most widely used bacteria belong to Thiobacillus species admit. Thiobacillus species is a gram positive bacterium, mainly bacillus, and is found in soil and spring water. Many of them are ferrous iron as an electron donor and can grow inorganic and nutrient. Some of them can be grown using CO ₂ in the air as a carbon source.

The reaction formula using sulfur compounds as a substrate under standard conditions of 25 ° C is as follows.

H ₂ S + ₂ O ₂ ? SO ₄ ^2- + 2H ^+? G? = -188.7 K? / Mol

S + H ₂ O + 1.5 O ₂ ? SO ₄ ^2- + 2H ^+? G? = -140.6 K? / Mol

S ₂ O ₃ ^- + H ₂ O + ₂ O ₂ ? ² SO ₄ ^2- + 2H ^+? G? = -97.7 K? / Mol

Thiobacillus species are divided into acidic bacteria that grow well at pH 2 ~ 5 and neutral bacteria that grow well at pH 6 ~ 8. Typical acid bacteria include T. thiooxidant and T. ferooxidant. They are used for desulfurization of coal and wastewater treatment. Neutrophils include T. thioparus, T, and denitrificant.

(3) Biological removal mechanisms such as methyl sulfide, methyl disulfide, methyl mercaptan, and organic acids

Methyl sulfide, methyl disulfide, methylmercaptan and the like can be used in combination with Thiobacillus sp. Pseudomonas sp. It is absorbed into microbial cells by microorganisms such as Bacillus sp. It is used to generate NADH which is used as an energy source of microorganisms. Microorganisms that exhibit this mechanism generally grow well in the neutral pH range.

Therefore, in the present invention, by applying the chemical liquid cleaning method (weak alkali washing) with sodium hydroxide and sodium hypochlorite at the front and rear ends of the biofilter,

The pH range of the high concentration acidic odor component contained in the incoming odor gas is reduced to the neutral pH range where the microorganisms can grow well by the sodium hydroxide at the front end to improve the deodorization efficiency in the biofilter unit,

The odor and gas residue generated in the biofilter portion is removed by sodium hypochlorite at the subsequent stage to improve the overall deodorization efficiency.

The present invention also provides a method for producing sodium hydroxide and sodium hypochlorite, which are used as washing chemicals, by electrolysis of an aqueous solution of sodium chloride, and a method in which sodium hydroxide and sodium hypochlorite, which are discharged to the outside after deodorization, And is then mixed with an aqueous solution and then stirred again with sodium chloride to be supplied to the discharge or chemical supply section to prevent secondary environmental pollution caused by the discharge water and to enable the discharge water to be recycled.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram showing an overall flow according to the present invention, FIG. 3 is an exemplary diagram showing the configuration of polling according to the present invention, FIG. 4 is a block diagram of the present invention FIG. 5 is a view showing an example of a structure of a treated water discharging portion according to the present invention,

The present invention relates to a deodorizing device (800) using a biofilter,

The particulate matter contained in the odor gas flowing into the interior of the biofilter unit through the suction fan is removed through alkaline cleaning with pretreatment water containing an aqueous solution of sodium hydroxide to remove the acidic concentration of the odor gas A preprocessing unit (100) for reducing the amount of water;

A biofilter unit 200 in which a malodorous gas with reduced acid concentration is introduced into the pretreatment unit and decomposed and removed by microorganisms;

The residual odor of the gas from which the odor is removed through the biofilter unit 200 and the odor generated from the biofilter unit 200 are introduced into the rear end of the biofilter unit 200 to flow the sodium hypochlorite aqueous solution And a post-treatment unit (300) which is discharged after being removed by the post-treatment water contained in the post-

The pre-processing unit 100, the bio-filter unit 200, and the post-processing unit 300 are configured to be continuous processes.

The pretreatment unit 100 reduces the odor of the acidic system by neutralizing the acid components such as hydrogen sulfide and methylmercaptan by performing alkaline cleaning of the inflowing gas with pretreatment water containing an aqueous solution of sodium hydroxide, Remove particulate matter such as dust and foam by water.

The pretreatment unit 100 contacts the odor gas introduced by the suction fan 110 with the cleaning water using the water or the working water and the pretreated water mixed with the sodium hydroxide aqueous solution to remove the particulate matter contained in the odor gas A pretreatment tank 120 for reducing odor concentration of the acidic system, and a pretreatment tank 120 for reducing the flow rate of the malodorous gas and improving the contact area between the pretreatment water and the odorous gas, ) Layer 130 and a pretreatment circulation pump 140 for circulating the pre-treatment water staying in the lower end of the pretreatment tank 120.

The pretreatment unit 100 includes a chemical storage tank 150 for storing an aqueous solution of sodium hydroxide and a chemical pump 160 for transporting sodium hydroxide aqueous solution stored in the chemical storage tank 150 to be sprayed into the pretreatment tank 120 ).

The pH sensor 122 in the pretreatment tank 120 is provided with a level switch 121 for sensing the level of water and a pH sensor 122 for sensing the pH concentration of the malodorous gas. (Not shown) judges whether the malodor gas flowing into the chemical control tank (not shown) is an acidic system. When the malodorous gas is in the acidic system, the chemical pump 160 is controlled to the chemical storage tank 150 The stored sodium hydroxide aqueous solution is transferred and injected into the pretreatment tank 120 so that the alkaline washing is performed so that the malodor concentration of the incoming acidic system is reduced to an appropriate level.

The biofilter unit 200 is connected to an upper portion of one side of the wall surface of the bio-tank 220 so as to be able to communicate with an upper portion of one side of the wall surface of the pretreatment tank 120 of the pretreatment unit 100.

The biofilter unit 200 provides a space for growing microorganisms to decompose and remove odors and VOCs introduced from the pretreatment unit 100 and is provided with a porous polymeric support 210 filled with a porous gas- A biological tank 220 through which the odorous gas is purified and the washing water retained through the porous polymeric polymer carrier layer 230; And a bio-circulation pump 240.

The biofilter unit 200 further includes a nutrient supply unit 250 for injecting a nutrient for microbial growth and a differential pressure gauge 260 for controlling system overload through sensing the pressure of the automobile.

A level switch 221 for sensing the level of water and a pH sensor 222 for sensing the pH concentration of the purified gas are installed in the bio-tank 220 of the bio- If the pH concentration detected by the sensor 222 is acidic, the chemical pump 160 is controlled in a field control panel (not shown) to spray an aqueous sodium hydroxide solution stored in the chemical storage tank 150 toward the polymer carrier layer 230 It is adjusted to an appropriate pH which is an essential factor for microbial growth and activity.

The nutrient supply unit 250 includes a nutrient storage tank 251 for storing a nutrient and a nutrient pump 252 for transporting the nutrient stored in the nutrient storage tank 251 to be sprayed into the biofilter unit 200.

As described above, in the biofilter unit 200 of the present invention, the malodorous gas from which the acidic odor component has been removed in the pretreatment unit 100 is introduced into the upper portion of the bio-tank 220 and passes downward through the polymer carrier layer 230 The odor component is decomposed into water (H ₂ O) and carbon dioxide (CO ₂ ) by the microorganisms fixed and growing on the porous foamed polymer carrier 210.

In addition, the pH of the bio-tank 220 is adjusted and the washing water supplemented with nutrients and microorganisms optimally regulates the growth environment of the microorganisms. The control of the growth environment of such microorganisms can be easily performed by those skilled in the art The detailed description thereof will be omitted.

The post-treatment unit 300 removes the malodorous components of the malodorous gas while passing through the polymer carrier layer 230 of the biofilter unit. The post-treatment unit 300 removes the malodorous components of the malodorous gas from the biofilter unit 200 through the bio- And the odor generated in the biofilter unit 200 is removed by the post-treatment water containing an aqueous sodium hypochlorite solution.

The post-treatment unit 300 contacts the treated water mixed with the sodium hypochlorite aqueous solution and the washing water using the water, the working water, and the like to the gas drawn in from the biofilter unit 200, A post-treatment tank 320 for removing odors generated by the sludge, circulating water, and the like, and residual odors not removed by the bio-filter unit 200; A pall ring layer 330 for reducing the amount of the odorous gas and reducing the contact area of the odorous gas and reducing the contact area of the odorous gas through the formation of a thin film of the post-treatment water, And a treatment circulation pump 340.

The post-treatment unit 300 includes a medicine storage tank 350 for storing medicines such as aqueous sodium hypochlorite solution and a chemical pump 360 for transporting the medicines stored in the medicament storage tank 350 to the post- ).

A level switch 321 for sensing the level of water is provided in the post-treatment tank 320. The clean gas removed to the residual odor in the post-treatment unit 300 is discharged to the demister 410 And the discharge pipe 420. [0050]

The polling layers 130 and 330 filled in the pre-processing part 100 and the post-processing part 300 are filled with poles 131 and 331 made of stainless steel, ceramic or synthetic resin as shown in FIG. 3, 131, and 331 are thinned by pretreated water or post-treated water on the surface due to contact with pre-treated water or post-treated water, and the contact area with the odorous gas is increased by the thin thin layer, Thereby fixing the component.

In addition, the present invention is characterized in that the sodium hydroxide aqueous solution injected into the pretreatment section 100 as a cleaning agent and the sodium hypochlorite aqueous solution injected into the post-treatment section 300 as a cleaning agent are produced and supplied by electrolysis of brine, (500) is connected to the post-processing unit (100) and the post-processing unit (300).

The chemical production and supply unit 500 supplies an aqueous solution of sodium hydroxide (NAOH) and an aqueous sodium hypochlorite solution of the post-treatment unit 300 of the pretreatment unit 100 and includes an electrolytic reaction unit 510 A first gas-liquid separator 520 connected to the electrolytic reaction unit 510 and supplied with chlorine gas and low-concentration saline; a second gas-liquid separator 520 connected to the first gas-liquid separator 520 to store chlorine gas; A second gas-liquid separator 540 connected to the electrolytic reaction unit 510 and supplied with hydrogen gas and sodium hydroxide aqueous solution, and a second gas-liquid separator 540 connected to the second gas-liquid separator 540 A low temperature reaction unit 560 connected to the first and second storage units 530 and 550 and generating an aqueous solution of sodium hypochlorite by reaction of an aqueous sodium hydroxide solution and chlorine gas; And a low temperature reaction unit 560, It is configured to include a third storage unit 570 that stores an aqueous solution of sodium.

The electrolytic reaction unit 510 generates chlorine (Cl ₂ ) gas, hydrogen (H ₂ ), and sodium hydroxide (NaOH) by receiving water (H ₂ O) and sodium chloride (NaCl) The first gas-liquid separator 520 separates chlorine gas and saline from each other by receiving chlorine gas and low-concentration saline generated by the electrolysis unit 510, The chlorine gas separated from the chlorine gas is supplied to and stored in the first storage unit 530.

The second gas-liquid separation unit 540 separates the aqueous sodium hydroxide solution and the hydrogen gas from each other by receiving the hydrogen gas and the aqueous solution of sodium hydroxide generated by the electrolysis reaction unit 510, 540) is supplied to and stored in the second storage unit 550. As shown in FIG.

The chlorine gas supplied to the first reservoir 530 and the sodium hydroxide aqueous solution stored in the second reservoir 550 are supplied to the low temperature reactor 560 and the low temperature reactor 560, To produce an aqueous sodium hypochlorite solution.

The sodium hypochlorite aqueous solution produced in the low temperature reaction unit 560 is supplied to and stored in the third storage unit 570 as described above and the third storage unit 570 is supplied with sodium hypochlorite through the sodium hypochlorite supply line 580 The sodium hydroxide aqueous solution stored in the second storage unit 550 is supplied to the chemical storage tank 350 of the treatment unit 300 through the sodium hydroxide supply line 590, And is also supplied to the medicine storage tank 150.

The aqueous solution of sodium hypochlorite according to the electrolysis of the sodium chloride aqueous solution is described in Korean Patent Laid-Open Publication No. 10-2012-0002074, and a detailed description thereof will be omitted.

In addition, the present invention relates to a method for producing a sodium chloride aqueous solution, which is connected to the pretreatment unit 100 and the post-treatment unit 300 and mixed together with hydrogen chloride to produce pretreated water and posttreatment water discharged from each of them, And a process water discharge unit 600 for supplying the process water to the supply unit 500 is further provided.

That is, after the deodorization process, the pretreated water containing the sodium hydroxide aqueous solution remains in the pretreatment tank 120 of the pretreatment unit, and the posttreatment water containing the sodium hypochlorite aqueous solution remains in the posttreatment tank 320, And the post-treatment water is discharged as it is, secondary environmental pollution caused by the cleaning chemicals contained therein is caused. Therefore, in the present invention, the pre-treatment water used in the bio- Sodium hydroxide and sodium hypochlorite are reacted with a low concentration of hydrogen chloride in the treated water discharge part 600 to produce an aqueous solution of sodium chloride and then discharge it.

The treated water discharging unit 600 includes a pretreatment water inlet pipe 610 connected to the pretreatment tank 120, a posttreatment water inlet pipe 620 connected to the posttreatment tank 320, Treated water containing an aqueous sodium hydroxide solution and a post-treated water containing an aqueous sodium hypochlorite solution are respectively introduced through the inlet 610 and the post-treatment water inlet pipe 620 and reacted with the supplied hydrogen chloride to generate an aqueous sodium chloride solution and chlorine gas A third gas-liquid separator 670 supplied with the chlorine gas and sodium chloride aqueous solution generated by the water tank 630, and a third gas-liquid separator 670 connected to the third gas-liquid separator 670, A fifth storage part 650 in which the chlorine gas generated and connected to the third gas-liquid separation part 670 is supplied and stored, and a fourth storage part 640 in which the chlorine gas generated in the fourth storage part 640 is stored The sodium chloride aqueous solution is discharged to the outside, And a discharge water discharge pipe 660 for supplying the electrolytic solution to the electrolytic reaction part 510 of the supply part.

Also, in the drain water agitating tank 630, a drain water agitator 631 for mixing hydrogen and sodium hypochlorite and sodium hydroxide is additionally provided.

That is, low-concentration sodium hydroxide remains in the pretreatment water discharged from the pretreatment unit 100, and low-concentration sodium hypochlorite remains in the after-treatment water discharged from the post-treatment unit 300. Therefore, 630), sodium chloride and water are produced by the reaction between hydrogen chloride and sodium hydroxide, and sodium chloride, water and chlorine gas are generated by the reaction of hydrogen chloride with sodium hypochlorite.

_{2HCl + NaOCl → NaOCl + H 2} O + Cl 2 ↑

HCl + NaOH → NaOCl + H ₂ O

At this time, the generated chlorine gas is collected again, stored in the fifth storage unit 650, and then supplied to the first storage unit 530 of the medicine production and supply unit 500, and utilized for the production of sodium hypochlorite aqueous solution .

As described above, according to the present invention, the cleaning chemicals to be used for the pretreatment water of the pretreatment unit 100 and the posttreatment water of the post-treatment unit 300 are respectively limited, and the pretreatment water and the posttreatment water discharged after the deodorization process are harmless to the human body The sodium chloride aqueous solution is produced, discharged and re-supplied for use.

Hereinafter, a deodorization method using the bio-filter type deodorization apparatus having the pre-treatment unit and the post-treatment unit of the present invention constructed as described above will be described.

The present invention relates to a malodor gas inflow step in which malodor gas is introduced into a pretreatment tank of a pretreatment section by a suction fan;

A pretreatment step in which, when the malodor gas introduced into the pretreatment tank is an acidic odor, it is alkaline cleaned with pretreatment water containing an aqueous solution of sodium hydroxide to reduce acidic odor concentration at a high concentration;

A microbial deodorization step in which, after the pretreatment step, the malodor gas introduced into the biofilter section is decomposed and removed by the microorganisms;

After the microbial deodorization step, the residual odor of the gas flowing into the post-treatment section, the sludge odor generated in the biofilter section and flowing into the post-treatment section, and the odor of the circulating water are removed by the post-treatment water containing sodium hypochlorite aqueous solution Processing step.

In addition, the present invention provides a method for producing a sodium hydroxide aqueous solution and an aqueous sodium hypochlorite solution by electrolysis of an aqueous sodium chloride solution, wherein the sodium hydroxide aqueous solution is supplied to the pretreatment step, and the sodium hypochlorite aqueous solution is supplied to the post- .

In addition, the present invention relates to a method for treating a bio-filter deodorizing apparatus, comprising the steps of: preparing a pretreatment water and a post-treatment water to be used in a biofilter type deodorization apparatus and producing a sodium chloride aqueous solution by reacting the pretreated water and post- .

The pretreatment may include humidification, removal of particulate matter, and the like in the pretreatment unit before the contaminated odor gas containing the odor, volatile organic compounds (VOCs), particulate pollutants and the like forcedly inhaled through the suction fan enters the biofilter, Not only the temperature is controlled but also the concentration of acidic odor is reduced to an appropriate level by alkaline washing of the pretreated water containing sodium hydroxide aqueous solution. At this time, it is preferable that the sodium hydroxide is supplied from a medicine production and supply unit.

In the microorganism deodorization step, the odor gas having a reduced odor concentration is introduced into the bio-tank which is connected to the upper portion of one side of the wall surface of the preprocessing tank of the pretreatment unit so that the upper portion of the wall surface is communicatable with the pretreatment unit, and the odor is decomposed and removed by the microorganism .

The post-treatment step is removed by post-treatment water containing an aqueous sodium hypochlorite solution in the post-treatment section, before the post-treatment step is released to the atmosphere through the discharge section, through the biofilter section. At this time, the sodium hypochlorite aqueous solution is preferably supplied from the medicine production and supply unit.

In the post-treatment step, the sodium hypochlorite aqueous solution is used as the post-treatment water in the post-treatment unit, and the aqueous sodium hydroxide solution in the pretreatment water that can not be removed through the pretreatment unit and the bio- During the washing process, the chlorine gas generated by the sodium hypochlorite aqueous solution reacts with the post-treatment tank to generate an aqueous sodium hypochlorite solution. Therefore, the aqueous sodium hydroxide solution that has flown into the post- .

That is, since the sodium hydroxide aqueous solution used as a cleaning agent in the pretreatment unit has strong corrosiveness and strong alkalinity, when it is discharged to the outside through the discharge portion of the deodorization apparatus of the present invention, In the present invention, by combining the post-treatment section using an aqueous sodium hypochlorite solution, the sodium hydroxide component introduced into the post-treatment section is reacted with the chlorine gas generated when the sodium hypochlorite aqueous solution and the cleansing water are mixed to produce an aqueous sodium hypochlorite solution . By this reaction, a small amount of the sodium hydroxide component introduced into the post-treatment section via the biofilter portion is removed, and the discharge to the outside is blocked.

As described above, the present invention is applied to the pretreatment unit of the biofilter unit in conjunction with the alkali cleaning, so that when the acidic odor is introduced at a high concentration, the concentration of the offensive odor is reduced first in the pretreatment unit, It is possible to prevent chemical attack and load of microorganisms growing on the polymer carrier and to prevent rapid pH fluctuation due to microbial metabolism, thereby maintaining stable deodorization efficiency.

In addition, the present invention is connected to the deodorization step of the microorganisms, so that the sludge generated by the biofilter itself, the circulating water odor, and residual odors which have not yet been treated are removed through the post-treatment unit using an oxidizing agent such as sodium hypochlorite , The environmental problem due to the residual odor in the air discharged from the deodorizing apparatus can be improved at low cost.

In addition, since the discharged pre-treatment water and the post-treatment water are discharged from the treated water discharging portion to the aqueous solution of sodium chloride which does not cause environmental pollution and are discharged after being agitated, the secondary environmental pollution The problem can be improved at low cost.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

(100): preprocessing unit (110): suction fan
(120): Pretreatment tank (121): Level switch
(122): pH sensor (130): Polling layer
(131): pall-ring (140): pre-treatment circulation pump
(150): medicine storage tank (160): drug pump
(200): a biofilter unit (210): a porous foamed polymer carrier
(220): Biotank (221): Level switch
(222): pH sensor (230): polymer carrier layer
(240): bio circulation pump (250): nutrient supply part
(251): nutrient storage tank (252): nutrient pump
(260): differential pressure gauge (300): post processor
(320): Post treatment tank (321): Level switch
(322): pH sensor (330): Polling layer
(331): pall-ring (340): post-treatment circulation pump
(350): drug storage tank (360): drug pump
(400): discharging part (410): demister
(420): discharge pipe (500): drug production supply unit
(510): an electrolysis reaction unit (520): a first gas-liquid separation unit
(530): first storage section (540): second gas-liquid separation section
(550): second storage unit (560): low temperature reaction unit
(570): third storage unit (580): sodium hypochlorite supply line
(590): sodium hydroxide supply line (600): treated water discharge section
(610): pre-treatment water inlet line (620): post-treatment water inlet line
(630): drain water tank (631): drain water water tank
(640): fourth storage unit (650): fifth storage unit
(660): drain water discharge pipe (800): deodorizer

Claims (11)

In the deodorization apparatus 800 using the biofilter unit,
The particulate matter contained in the odor gas flowing into the interior of the biofilter unit through the suction fan is removed through alkaline cleaning with pretreatment water containing an aqueous solution of sodium hydroxide to remove the acidic concentration of the odor gas A preprocessing unit (100) for reducing the amount of water;
A biofilter unit 200 in which a malodorous gas with reduced acid concentration is introduced into the pretreatment unit and decomposed and removed by microorganisms;
The residual odor of the gas from which the odor is removed through the biofilter unit 200 and the odor generated from the biofilter unit 200 are introduced into the rear end of the biofilter unit 200 to flow the sodium hypochlorite aqueous solution And a post-treatment unit (300) which is discharged after being removed by the post-treatment water contained in the post-
The pre-processing unit 100, the bio-filter unit 200, and the post-processing unit 300 are configured to be continuous processes,
The high concentration acidic odor introduced by the suction fan is stepwise reduced and removed by the pretreated water containing the sodium hydroxide aqueous solution of the pretreatment portion, the microorganism of the biofilter portion and the post-treatment water containing the sodium hypochlorite aqueous solution of the post-
The sodium hydroxide aqueous solution component in the pretreatment water that can not be removed through the pretreatment unit and the biofilter unit and reacted with the chlorine gas generated by the aqueous solution of sodium hypochlorite in the post-treatment unit to generate sodium hypochlorite aqueous solution, Wherein the pretreatment unit and the post-treatment unit are continuously provided.
The method of claim 1,
The pretreatment unit 100 contacts the odor gas introduced by the suction fan 110 with the cleaning water using the water or the working water and the pretreated water mixed with the sodium hydroxide aqueous solution to remove the particulate matter contained in the odor gas A pretreatment tank 120 for reducing the concentration of malodorous acid in the acidic system and a pollution layer 130 for filling the pretreatment tank 120 to reduce the flow rate of the malodorous gas and to increase the contact area between the pretreatment water and the malodorous gas A pretreatment circulation pump 140 for circulating the pretreatment water remaining in the lower end of the pretreatment tank 120, a drug storage tank 150 for storing an aqueous solution of sodium hydroxide, And a chemical pump (160) for transporting sodium aqueous solution to be sprayed into the pretreatment tank (120)
The biofilter unit 200 provides a space for growing microorganisms to decompose and remove odors and VOCs introduced from the pretreatment unit 100 and is provided with a porous polymeric support 210 filled with a porous gas- A biological tank 220 through which the odorous gas is purified and the washing water retained through the porous polymeric polymer carrier layer 230; A bio-circulation pump 240,
The post-treatment unit 300 contacts the treated water mixed with the sodium hypochlorite aqueous solution and the washing water using the water, the working water, and the like to the gas drawn in from the biofilter unit 200, A post-treatment tank 320 for removing odors generated due to sludge and circulating water in the post-treatment tank 320 and residual odors not removed in the bio-filter unit 200; A pall ring layer 330 for increasing the contact area of the odor gas through the formation of a thin film of the post-treatment water, and a post-treatment for circulating post-treatment water staying in the post-treatment tank 320 A medicine storage tank 350 for storing a sodium hypochlorite aqueous solution and a medicine pump 360 for transporting medicines stored in the medicine storage tank 350 to be sprayed into the post-treatment tank 320 Lt; / RTI >
The high concentration acidic odor introduced by the suction fan is reduced and removed stepwise by the pretreated water containing the sodium hydroxide aqueous solution of the pretreatment portion, the microorganism of the biofilter portion and the post-treatment water containing the sodium hypochlorite aqueous solution of the post treatment portion Wherein the pre-treatment section and the post-treatment section are continuously provided.
The method of claim 2,
The pretreatment tank 120 includes a level switch 121 for sensing the level of water and a pH sensor 122 for sensing the pH concentration of the malodorous gas,
The bio-tank 220 includes a level switch 221 for sensing the level of water and a pH sensor 222 for sensing the pH of the purified gas.
Wherein the pretreatment tank (320) is provided with a level switch (321) for sensing a water level, and the pre-treatment unit and the post-treatment unit are continuously provided.
The method of claim 2,
A chemical production and supply unit 350 for generating and supplying an aqueous solution of sodium hydroxide and an aqueous solution of sodium hypochlorite by electrolysis of sodium chloride aqueous solution to the chemical storage tank 150 of the pretreatment unit 100 and the chemical storage tank 350 of the post- Wherein the pretreatment unit and the post-treatment unit are continuously connected to each other.
The method of claim 4,
The chemical production and supply unit 500 includes an electrolysis reaction unit 510 for electrolyzing sodium chloride aqueous solution, a first gas-liquid separation unit 520 connected to the electrolysis reaction unit 510 and supplied with chlorine gas and low- A first storage part 530 connected to the first gas-liquid separation part 520 to store chlorine gas, and a second storage part 530 connected to the electrolysis reaction part 510 to supply a hydrogen gas and an aqueous solution of sodium hydroxide A second storage unit 550 connected to the second gas-liquid separation unit 540 and storing an aqueous sodium hydroxide solution and connected to the chemical storage tank 150 of the pretreatment unit, A low temperature reaction unit 560 connected to the first and second storage units 530 and 550 and generating an aqueous solution of sodium hypochlorite by the reaction of sodium hydroxide aqueous solution and chlorine gas and a low temperature reaction unit 560 connected to the low temperature reaction unit 560 for storing sodium hypochlorite aqueous solution And is connected to the drug storage tank 350 of the post-treatment section A third storage unit 570 pre-processing unit and the processing unit after the continuous Eco biofilter type deodorization apparatus is installed, it characterized in that it comprises a.
The method according to claim 1 or 2,
Treatment water discharging unit 600 connected to the pretreatment unit 100 and the post-treatment unit 300 to mix pretreatment water and post-treatment water discharged from each of them together with hydrogen chloride to produce an aqueous solution of sodium chloride, Wherein the pretreatment unit and the post-treatment unit are continuously provided.
The method of claim 6,
The treated water discharging unit 600 includes a pretreatment water inlet pipe 610 connected to the pretreatment tank 120, a posttreatment water inlet pipe 620 connected to the posttreatment tank 320, Treated water containing an aqueous sodium hydroxide solution and a post-treated water containing an aqueous sodium hypochlorite solution are respectively introduced through the inlet 610 and the post-treatment water inlet pipe 620 and reacted with the supplied hydrogen chloride to generate an aqueous sodium chloride solution and chlorine gas A third gas-liquid separator 670 supplied with the chlorine gas and sodium chloride aqueous solution generated by the water tank 630, and a third gas-liquid separator 670 connected to the third gas-liquid separator 670, A fifth storage part 650 in which the chlorine gas generated and connected to the third gas-liquid separation part 670 is supplied and stored, and a fourth storage part 640 in which the chlorine gas generated in the fourth storage part 640 is stored The sodium chloride aqueous solution is discharged to the outside, And a discharge water discharge pipe (660) for supplying water into the electrolytic reaction unit (510) of the supply unit, wherein the pre-treatment unit and the post-treatment unit are continuously provided.
The method of claim 7,
Wherein the fourth storage unit is connected to the electrolysis reaction unit (510) of the chemical production and supply unit (500), and sodium chloride aqueous solution is supplied thereto, and the pre-treatment unit and the post-treatment unit are continuously provided.
A malodorous gas inflow step of introducing malodorous gas into the pretreatment tank of the pretreatment section by the suction fan;
A pretreatment step in which, when the malodor gas introduced into the pretreatment tank is an acidic odor, it is alkaline cleaned with pretreatment water containing an aqueous solution of sodium hydroxide to reduce acidic odor concentration at a high concentration;
A microbial deodorization step in which, after the pretreatment step, the malodor gas introduced into the biofilter section is decomposed and removed by the microorganisms;
After the microbial deodorization step, the residual odor of the gas flowing into the post-treatment section, the sludge odor generated in the biofilter section and flowing into the post-treatment section, and the odor of the circulating water are removed by the post-treatment water containing sodium hypochlorite aqueous solution Processing step is continuously performed,
The pre-treatment water containing the sodium hydroxide aqueous solution in the pretreatment step, the microorganisms in the microbial deodorization stage, and the post-treatment water containing the sodium hypochlorite aqueous solution in the post-treatment stage, Abatement and removal,
The sodium hydroxide aqueous solution component in the pretreatment water that can not be removed through the pretreatment unit and the biofilter unit and reacted with the chlorine gas generated by the aqueous solution of sodium hypochlorite in the post-treatment unit to generate sodium hypochlorite aqueous solution, Wherein the pretreatment unit and the post-treatment unit are continuously provided.
The method of claim 9,
Characterized by further comprising the step of electrolyzing an aqueous solution of sodium chloride to produce an aqueous solution of sodium hydroxide and an aqueous solution of sodium hypochlorite, supplying the aqueous solution of sodium hydroxide to a pretreatment step and supplying an aqueous sodium hypochlorite solution to a post-treatment step Deodorizing method using an eco-friendly biofilter-type deodorizing device in which a pre-treatment section and a post-treatment section are continuously provided.
The method of claim 9,
After the deodorizing operation in the pre-treatment step and the post-treatment step, the discharged pretreatment water and the after-treatment water are introduced into the treated water discharge part, and are produced as sodium chloride aqueous solution by reaction with low concentration hydrogen chloride and then discharged to the outside or supplied to the medicine production and supply part Further comprising a water treatment step, wherein the pretreatment unit and the post-treatment unit are continuously provided.

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