KR100991403B1 - Wastewater treatment apparatus reducing a nasty smell and method thereof - Google Patents

Abstract

PURPOSE: A bad smell reduction waste water treatment facility and a method thereof are provided to process the bad smell gas without separate culture tub and bio-reaction, thereby more effectively and economically reducing the bad smell of waste water. CONSTITUTION: A bad smell reduction waste water processing facility(200) includes a sludge detention/bad smell reduction tub(250), a bio-filter(260), a primary precipitation tub(220), a biological reaction tub(230), a secondary precipitation tub(240). The reduction tub makes the sludge and bad smell gas to flow in and detentions the sludge and primarily processes the bad smell by using the microorganism. The bio filter secondarily processes the bad smell gas by using the microorganism. The primary precipitation tub performs the primary reaction about the preprocessed flown out water in a preprocessing tub(210). The biological reaction tub removes at least on among the organic compounds, nutrient salt, nitrogen and phosphorus of the flown out water of the primary tub. The secondary precipitation tub performs a secondary precipitation reaction about the flown out water of the biological reaction tub. The primary precipitation tub and a secondary precipitation tub transmits the occurred sludge and bad smell gas to the sludge detention/bad smell reduction tub.

Description

Odor reduction wastewater treatment facility and method {WASTEWATER TREATMENT APPARATUS REDUCING A NASTY SMELL AND METHOD THEREOF}

The present invention relates to a wastewater treatment facility and a method for treating wastewater, and more particularly, to a wastewater treatment facility and a method for treating wastewater while reducing the odor of the wastewater.

The main components of odor generated in wastewater treatment facilities are ammonia (NH ₃ ), hydrogen sulfide (H ₂ S), and amines. These components irritate the sense of smell and cause discomfort and aversion. These odors can cause headaches and vomiting for workers in wastewater treatment facilities or adversely affect the health and life of the residents living in the surrounding area.

In order to treat these odor components, the upper part of the facility where the malodorous substance is generated is covered and the generated malodorous gas is collected / deodorized using the deodorizing facility and then released into the atmosphere.

Deodorization method of odor gas can be classified into physicochemical and biological deodorization. Physicochemical deodorization includes acid / alkaline cleaning, activated carbon adsorption, catalyst deodorization, combustion, oxidation, and the like. Biological deodorization includes biofilter deodorization, packed biodeodorization, activated sludge aeration deodorization, activated sludge scrubber deodorization, and the like.

Conventionally, a physicochemical deodorization method has been widely used for the treatment of odor gas, but a physicochemical deodorization method has problems in terms of economy and environment. For example, the adsorption method requires a regeneration process of an adsorbent such as activated carbon and has a high processing cost.In the combustion method, more odorous substances are generated or dioxin is generated due to the generation of aldehydes, ketones and other unsaturated acids during incomplete combustion. There is a problem that it may cause secondary air pollution. In addition, the cleaning method, the oxidation method, etc. may also cause a secondary environmental pollution problem due to chemical consumption, and a high cost of maintenance / management costs may occur. Therefore, in recent years, more environmentally friendly, high efficiency, low cost clean technology biological deodorization is preferred.

However, in the case of general biological deodorization, there is a problem in that separate culture tanks and microbial reactors have to be installed to be suitable environmental conditions for forming random soil microbial fungi in wastewater treatment facilities in order to remove such malodorous gases.

The problem to be solved by the present invention is to provide a odor reduction wastewater treatment facility and method for more efficiently and economically treating odorous gas that can be generated from wastewater, such as livestock wastewater, sewage.

The odor reduction wastewater treatment facility according to the present invention includes a sludge storage / odor reduction tank for introducing sludge and odor gas, storing the sludge, and first treating the odor gas using microorganisms; And a biofilter for introducing the malodorous gas leaked from the sludge storage / odor reduction tank and performing secondary treatment using microorganisms.

In addition, the odor reduction wastewater treatment facility introduces sludge from the sludge storage / odor reduction tank and discharges the sludge cake through the dehydration treatment, the sludge treatment tank for conveying the remaining sludge and odor gas to the sludge storage / odor reduction tank. It may further include.

In addition, the malodor reduction wastewater treatment facility further includes a pretreatment tank for pretreatment of the influent wastewater and transferring the generated sludge and malodorous gas to the sludge storage / odor reduction tank, wherein the sludge storage / odor reduction tank is a microbial bacterial group sludge. Can be transferred to a pretreatment tank.

In addition, the odor reduction wastewater treatment facility further includes a batch reaction tank for performing microbial reaction and precipitation reaction on the effluent of the pretreatment tank, the batch reaction tank can transfer the sludge and odor gas generated to the sludge storage / odor reduction tank. have.

In addition, the odor reduction wastewater treatment facility includes a primary sedimentation tank for performing a primary precipitation reaction on the effluent of the pretreatment tank; A biological reaction tank for removing organic matter, nutrients, nitrogen and / or phosphorus from the effluent of the primary precipitation tank; And a secondary precipitation tank configured to perform a secondary precipitation reaction on the effluent of the biological reaction tank, wherein the primary precipitation tank and the secondary precipitation tank may transfer the generated sludge and odor gas to the sludge storage / odor reduction tank.

In addition, the sludge storage / malodor reduction tank may include a microbial activator supply tank for supplying an active agent impregnated with a high concentration of microorganisms in the porous media to enhance the microbial activity of the sludge storage / malodor reduction tank.

The odor reduction wastewater treatment method according to the present invention includes the steps of introducing the sludge and odor reduction tank sludge and odor gas; A sludge storage / odor reduction tank for storing the sludge, and first treating the odor gas with a microorganism; And a biofilter introducing the malodorous gas leaked from the sludge storage / odor reduction tank and performing secondary treatment using microorganisms.

In addition, the odor reduction wastewater treatment method includes a step of sludge treatment tank to introduce sludge from the sludge storage / odor reduction tank and discharge the sludge cake through the dehydration treatment; The sludge treatment tank may further include the step of conveying the remaining sludge and odor gas to the sludge storage / odor reduction tank.

In addition, the odor reduction waste water treatment method comprises the steps of pre-treatment of the pre-treatment waste water; A pretreatment tank transferring the generated sludge and odor gas to the sludge storage / odor reduction tank; And the sludge storage / odor reduction tank may further comprise the step of transferring the microbial bacterial group sludge to the pretreatment tank.

In addition, the odor reduction wastewater treatment method includes the step of performing a microbial reaction and precipitation reaction for the effluent of the batch reactor in the batch reactor; And transferring the sludge and the malodorous gas generated in the batch reaction tank to the sludge storage / odor reduction tank.

In addition, the odor reduction wastewater treatment method comprises the steps of performing a primary precipitation reaction for the effluent of the pre-treatment tank in the primary precipitation tank; Removing, by a biological reactor, organic matter, nutrients, nitrogen and / or phosphorus from the effluent of the primary settling tank; Performing a secondary precipitation reaction on the effluent of the biological reactor by the secondary precipitation tank; And transferring the sludge and the malodorous gas in which the primary and secondary sedimentation tanks are generated to the sludge storage / odor reduction tank.

According to the present invention, it is possible to treat the odor gas without a separate culture tank and microbial reactor can be carried out more efficient / economic wastewater odor reduction.

1 is a view showing a odor reduction wastewater treatment facility according to a comparative example of the present invention.
Figure 2a is a view showing a odor reduction wastewater treatment facility according to an embodiment of the present invention.
Figure 2b is a view showing a odor reduction wastewater treatment facility according to another embodiment of the present invention.
3 is a view for showing the sludge storage / odor reduction tank according to an embodiment of the present invention.
4 is a view showing a odor reduction wastewater treatment method according to an embodiment of the present invention.
5 is a view showing a odor reduction wastewater treatment method according to another embodiment of the present invention.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, only the embodiments are to make the disclosure of the present invention complete, and those skilled in the art to which the present invention pertains. It is provided to fully inform the scope of the invention, and the invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

1 is a view showing a odor reduction wastewater treatment facility according to a comparative example of the present invention. Referring to FIG. 1, the odor reduction wastewater treatment facility 100 includes a pretreatment tank 110, a primary sedimentation tank 120, an anaerobic / reaction tank 130, a secondary sedimentation tank 140, and a culture tank 150. do. The odor reduction wastewater treatment facility 100 may reduce odor in all wastewater treatment such as domestic sewage and livestock wastewater.

The pretreatment tank 110 removes the primary contaminants of the wastewater, such as removing coarse contaminants and sedimentation materials of the incoming wastewater, and introduces the microorganism fungus sludge cultured from the culture tank 150 to the microorganisms. It combines the fungal sludge and the hardly degradable contaminants in the wastewater and removes odors through the microbial reaction.

The primary sedimentation tank 120 is introduced into the anaerobic / reactor 130 after performing the primary precipitation by introducing the effluent of the pretreatment tank 110.

The anaerobic / reactor 130 maintains the anaerobic anaerobic state by adjusting the dissolved oxygen concentration (DO) only by stirring. In this case, the anaerobic anaerobic state may correspond to, for example, dissolved oxygen concentration (DO) of 0.1 to 0.5 mg / L, but is not limited thereto.

In addition, the anaerobic / reactor 130 mixes the microbial bacterial group sludge introduced from the culture tank 150 and the wastewater introduced from the primary settling tank 120. As a result, the microbial flora sludge and the wastewater combine, aggregate, and / or polycondensate to form macromolecules, thereby suppressing bubble generation, and coping with changes in yield, concentration, and water temperature, and the decomposition process. Since it disappears, there is no gas generation and no odor emission. In the intermittent operation, over-intake of phosphorus and oxidation of ammonia nitrogen to nitrate nitrogen occur in abandonment, and in the anaerobic state in the anaerobic state, nitrogen nitrate is released by the microorganisms related to denitrification among soil microorganisms. The action of removing nitrogen occurs while reducing to gas to remove nitrogen, phosphorus and odors.

The secondary sedimentation tank 140 is discharged by inflow of the effluent of the anaerobic / reactor 130 to perform secondary sedimentation and solid-liquid separation, and the discharged effluent is disinfected and discharged.

The culture tank 150 creates an environment similar to the soil natural environmental conditions in which the random and coarse soil microbial bacteria can be cultured well. At this time, the culture tank 150 is placed inside or outside an underwater or terrestrial microbial reactor (not shown) that works in conjunction with the culture tank 150.

The aquatic or terrestrial microbial reactor (not shown) is equivalent to the total amount of treated oxygen and the total amount of biological oxygen demand (BOD) to be treated, so that it can be an environmental condition suitable for forming a random, familial soil microbial flora in nature. Of porous pumice, zeolite or gangue stone containing crystals and siliceous sludge obtained by the production of humus and the same amount of soil microbial flora that has the function of corrosive contaminants such as peat, peat or organic matter by itself The crushed stone is mixed and filled.

The culture tank 150 is a predetermined aeration while repeating the anaerobic-aerobic state by giving an intermittent aeration such as 40 minutes aeration, 20 minutes stop, etc. in a breathable state of about 0.3 ~ 0.7 mg / L on average Cultivate arbitrary soil microbial flora for a period of time (eg, 24 to 48 hours).

In addition, the culture tank 150 is returned to the pre-treatment tank 110 and the anaerobic / reactor 130, the culture-activated microbial fungi sludge for 24 hours evenly by half the capacity of the culture tank 150, and mixed with the waste water Make contact to reduce odor.

However, the odor reduction wastewater treatment facility 100 according to FIG. 1 has a problem of installing a separate culture tank 150 and a microbial reactor (not shown) in order to reduce odors.

Figure 2a is a view showing a odor reduction wastewater treatment facility according to an embodiment of the present invention, Figure 2b is a view showing a odor reduction wastewater treatment facility according to another embodiment of the present invention. Referring to FIG. 2A, the odor reduction wastewater treatment facility 200 includes a pretreatment tank 210, a primary precipitation tank 220, a biological reaction tank 230, a secondary precipitation tank 240, and a sludge storage / odor reduction tank 250. ), A biofilter 260 and a sludge treatment tank 270 to treat wastewater such as livestock wastewater or sewage.

The pretreatment tank 210 removes primary contaminants of the wastewater such as removing coarse contaminants and sedimentation materials of the incoming wastewater, and partially sludge cultured microorganisms from the sludge storage / odor reduction tank 250. To combine the some sludge and the hardly degradable contaminants in the waste water, it is possible to remove some of the odor through the microbial reaction.

The pretreatment tank 210 may include a flow adjustment tank (not shown), and the flow rate adjustment diagram (not shown) maintains stability according to flow rate and water quality fluctuation, and adversely affects the temporary inflow of toxic substances (eg, , PH fluctuations, etc.).

The primary sedimentation tank 220 is introduced into the biological reaction tank 230 after the first precipitation by inflow of the effluent of the pretreatment tank 210, the biological reaction tank 230 is organic matter, nutrients, nitrogen of the influent waste water And / or phosphorus and the like can be removed.

The secondary sedimentation tank 240 is discharged by inflow of the effluent of the biological reaction tank 230 to perform secondary sedimentation and solid-liquid separation, and the discharged effluent is disinfected and discharged.

The primary sedimentation tank 220 and the secondary sedimentation tank 240 introduce the generated sludge and odor gas into the sludge storage / odor reduction tank 250.

Referring to FIG. 2B, when treating livestock wastewater, the odor reduction wastewater treatment facility 200 ′ according to another embodiment of the present invention may include the primary sedimentation tank 220 in the odor reduction wastewater treatment facility 200 of FIG. 2A. ), The biological reactor 230 and the secondary precipitation tank 240 may be replaced by the batch reactor (300). However, the scope of the present invention is not limited thereto. For example, the primary settling tank 220 and the biological reactor 230 is replaced by a batch reactor (SBR: Sequencing Batch Reactor) (300), or the secondary settling tank 240 and the biological reactor 230 is the batch reactor May be replaced by 300.

In the batch reactor 300, microbial reaction and precipitation occur together. That is, after the wastewater is introduced into the batch reactor 300, the biological reaction is performed by injecting air, and then the air supply is blocked to settle the sludge, discharge the supernatant water, and then slightly idle the sludge and odor. The gas is discharged into the sludge storage / odor reduction tank 250.

Sludge storage / odor reduction tank 250 is a sludge and odor gas introduced from the pretreatment tank 210, the primary settling tank 220, the secondary settling tank 240 and / or batch reaction tank (not shown), The sludge is stored and the sludge to be treated is transferred to the sludge treatment tank 270 in consideration of the throughput of the sludge treatment tank 270.

The sludge storage / odor reduction tank 250 primarily processes the odor gas of the introduced wastewater using the odor removal method through microbial contact. At this time, the sludge storage / odor reduction tank 250 may include an air diffuser (not shown) inside or outside. The acid diffuser (not shown) may supply oxygen required when the microorganism oxidizes the organic matter, assist the mixing of the waste water and the microorganism, and maintain the reproduction of the microorganism.

The sludge storage / odor reduction tank 250 transfers the untreated malodorous gas to the biofilter 260 for secondary treatment.

The sludge storage / odor reduction tank 250 introduces some sludge of the culture-activated microbial fungus into the pretreatment tank 210 so that the odor of waste water can be reduced in advance.

The biofilter 260 introduces untreated malodorous gas from the sludge storage / odor reduction tank 250 and performs secondary treatment. More specifically, the biofilter 260 treats contaminants in the malodorous gas in a biological manner. For example, the biofilter 260 immobilizes the microorganisms on the porous carrier to decompose contaminants into water, carbon dioxide or harmless salts without harm by the metabolic activity of the microorganisms. Formulas 1 to 2 below represent reaction schemes in which nitrogen-based malodorous and sulfur-based malodorous gases are treated by related microorganisms.

The sludge treatment tank 270 discharges sludge from the sludge storage / odor reduction tank 250 and discharges the sludge cake through a dehydration process using sand filtration, a filter press, a vacuum filter, and the like. The malodorous gas is transferred back to the sludge storage / odor reduction tank 250 to increase treatment efficiency.

The odor reduction wastewater treatment facilities 200 and 200 ′ shown in FIGS. 2A and 2B may first treat odor gas of wastewater with a sludge storage / odor reduction tank 250 without a separate culture tank and a microbial reactor. In addition, the biofilter 260 may perform the secondary treatment.

3 is a view for showing the sludge storage / odor reduction tank according to an embodiment of the present invention. Referring to FIG. 3, the sludge storage / odor reduction tank 250 may include a microbial activator supply tank 251. At this time, the microorganism activator supply tank 251 is installed to enhance the activity of the microorganisms for removing the odor of the sludge storage / malodor reduction tank 250, and supplies an active agent impregnated with a high concentration of microorganisms in the porous media.

The sludge storage / odor reduction tank 250 may preferably have a structure having a length (x) longer than a width (y). For example, x: y may have a ratio of 2: 1 to 3: 1.

However, this does not mean limiting the scope of the present invention thereto. For example, the horizontal (y) may be longer than the vertical (x), the sludge storage / odor reduction tank 250 may correspond to a structure of a shape other than a rectangular shape.

4 is a view showing a odor reduction wastewater treatment method according to an embodiment of the present invention. The odor reduction wastewater treatment method of FIG. 4 may be performed by the odor reduction wastewater treatment facility shown in FIG. 2A or 2B.

Referring to Figure 4, sludge and odor gas is introduced into the sludge storage / odor reduction tank (S110). The malodorous gas introduced into the sludge storage / odor reduction tank is firstly treated by microorganisms.

Next, some of the introduced sludge flows into the sludge treatment tank 270, and untreated malodorous gas or residual malodorous gas after treatment is introduced into the biofilter (S120). At this time, the sludge inflow flowing into the sludge treatment tank is introduced in consideration of the throughput of the sludge treatment tank.

Next, the malodorous gas introduced into the biofilter is discharged by secondary treatment, and the sludge introduced into the sludge treatment tank is discharged into the sludge cake through dehydration (S130).

5 is a view showing a odor reduction wastewater treatment method according to another embodiment of the present invention. The odor reduction wastewater treatment method of FIG. 5 may be performed by the odor reduction wastewater treatment facility shown in FIG. 2A or 2B.

Referring to FIG. 5, when wastewater is introduced into the odor reduction wastewater treatment facility, the introduced wastewater is pretreated and sludge and odor gas generated during the pretreatment are introduced into the sludge storage / odor reduction tank (S210).

The pretreated effluent is first settled, and the sludge and odor gas generated during the first settling process are introduced into the sludge storage / odor reduction tank (S220). Next, the effluent after the first precipitation process biologically reacted and the treated water is second precipitated, and the sludge and odor gas generated during the secondary precipitation process is introduced into the sludge storage / odor reduction tank (S230). In this case, a batch reaction process may be performed instead of the biological reaction process and the primary precipitation process and / or the secondary precipitation process. The batch reaction process is described above as a reaction process performed in a batch reactor, and thus description thereof will be omitted to avoid duplication.

Next, the odor gas introduced from the sludge storage / odor reduction tank is first processed, and some of the introduced sludge is introduced into the sludge treatment tank (S240). At this time, the sludge inflow flowing into the sludge treatment tank is introduced in consideration of the throughput of the sludge treatment tank.

Next, the biofilter secondary treatment of the malodorous gas introduced from the sludge storage / odor reduction tank, and the sludge treatment tank discharges the sludge cake by treating the introduced sludge (S250). At this time, the sludge treatment tank transfers untreated sludge and / or malodorous gas back to the sludge storage / odor reduction tank to increase treatment efficiency.

As described above, optimal embodiments have been disclosed in the drawings and the specification. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not used to limit the scope of the present invention as defined in the meaning or claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

110: pretreatment tank, 120: primary precipitation tank,
130: anaerobic / reactor, 140: secondary sedimentation tank
150: culture tank
200 and 200 ': odor reduction wastewater treatment plant
210: pretreatment tank, 220: primary precipitation tank
230: biological reaction tank, 240: secondary precipitation tank
250: sludge storage / odor reduction tank, 251: microbial activator supply tank
260: biofilter, 270: sludge treatment tank, 300: batch reactor

Claims (12)

A sludge storage / odor reduction tank for introducing sludge and malodorous gas, storing the sludge, and first treating the malodorous gas using microorganisms;
A biofilter for introducing the odor gas leaked from the sludge storage / odor reduction tank and performing secondary treatment using microorganisms;
A primary precipitation tank for performing a primary precipitation reaction on the effluent pretreated in the pretreatment tank;
A biological reactor for removing at least one of organic matter, nutrients, nitrogen, and phosphorus in the effluent of the primary precipitation tank; And
It comprises a secondary precipitation tank for performing a secondary precipitation reaction for the effluent of the biological reaction tank,
The first settling tank and the second settling tank is odor reduction wastewater treatment facility for transferring the generated sludge and odor gas to the sludge storage / odor reduction tank. According to claim 1, wherein the odor reduction wastewater treatment facility
And a sludge treatment tank for introducing sludge from the sludge storage / odor reduction tank, discharging the sludge cake through dehydration treatment, and returning the remaining sludge and odor gas to the sludge storage / odor reduction tank. According to claim 2, wherein the odor reduction wastewater treatment facility
The pretreatment tank pre-treats the incoming wastewater, and transfers the generated sludge and odor gas to the sludge storage / odor reduction tank,
The sludge storage / odor reduction tank is a odor reduction wastewater treatment facility for transferring the microbial bacterial group sludge to the pretreatment tank. According to claim 3, The odor reduction wastewater treatment facility
Further comprising a batch reactor for performing the microbial reaction and precipitation reaction for the effluent of the pretreatment tank,
The batch reaction tank is a odor reduction wastewater treatment facility for transferring the generated sludge and odor gas to the sludge storage / odor reduction tank. delete The method of claim 1, wherein the sludge storage / odor reduction tank
An odor reduction wastewater treatment facility comprising a microorganism activator supply tank for supplying an active agent having high concentration of microorganisms impregnated into the porous media to enhance the microbial activity of the sludge storage / odor reduction tank. Introducing sludge and odor gas into the sludge storage / odor reduction tank;
A sludge storage / odor reduction tank for storing the sludge, and first treating the odor gas with a microorganism;
Introducing, by the biofilter, the malodorous gas leaked from the sludge storage / odor reduction tank and performing secondary treatment using microorganisms;
Performing a primary precipitation reaction on the effluent pretreated in the pretreatment tank by the primary precipitation tank;
Removing at least one of organic matter, nutrients, nitrogen and phosphorus from the effluent of the primary settling tank by a biological reactor;
Performing a secondary precipitation reaction on the effluent of the biological reactor by the secondary precipitation tank; And
Odor reduction wastewater treatment method comprising the step of transferring the sludge and odor gas generated in the primary and secondary sedimentation tank to the sludge storage / odor reduction tank. The method of claim 7, wherein the odor reduction wastewater treatment method
A sludge treatment tank introducing sludge from the sludge storage / odor reduction tank and discharging the sludge cake through a dehydration treatment;
The sludge treatment tank further includes the step of returning the remaining sludge and odor gas to the sludge storage / odor reduction tank. The method of claim 8, wherein the odor reduction wastewater treatment method
Pretreatment of the incoming wastewater by the pretreatment tank;
The pretreatment tank transferring the generated sludge and the malodorous gas to the sludge storage / odor reduction tank; And
The sludge storage / malodor reduction tank further comprises the step of transferring the microbial bacterial group sludge to the pretreatment tank. The method of claim 9, wherein the odor reduction wastewater treatment method
Performing a microbial reaction and a precipitation reaction on the effluent of the pretreatment tank in a batch reactor; And
Odor reduction wastewater treatment method further comprising the step of transporting the sludge and odor gas generated in the batch reaction tank to the sludge storage / odor reduction tank. delete The method of claim 7, wherein the sludge storage / odor reduction tank
And a microbial activator supply tank for supplying an active agent having a high concentration of microorganisms impregnated into the porous media to enhance the microbial activity of the sludge storage / odor reduction tank.

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