CN203095792U - Anaerobic biochemical sewage treatment system - Google Patents

Abstract

The utility model relates to the technical field of sewage treatment, which is an anaerobic biochemical sewage treatment system and method, comprising a high-concentration waste water collection pool connected in sequence, a first lifting pump, a coagulation reactor, a micro-electrolysis reactor, and a Fenton oxidation reaction device, neutralization coagulation reactor, first settler, comprehensive sewage adjustment tank, second lift pump, acidification hydrolysis reactor, intermediate temperature adjustment water tank, anaerobic feed pump, anaerobic biochemical reactor, anaerobic settler , an aerobic biochemical reaction tank and a second sedimentation tank, and also includes a grid and a water seal device; the high-concentration wastewater source is connected to the inlet of the high-concentration wastewater collection tank, the low-concentration wastewater source is connected to the grid inlet, and the grid outlet is connected to Integrated sewage conditioning tank. The utility model can effectively and comprehensively treat high-concentration waste water and low-concentration waste water, and the water quality of the treated sewage effluent is more stable, safe and reliable, and realizes rapid, low-energy and high-efficiency sewage treatment.

Description

Anaerobic biochemical sewage treatment system

technical field

The utility model relates to the technical field of sewage treatment, in particular to an anaerobic biochemical sewage treatment system. the

Background technique

Sewage treatment refers to the process of purifying sewage to meet the water quality requirements of a certain water body for drainage or reuse. There are many ways to treat sewage, which can be generally classified into physical methods, chemical methods and biological methods. The general sewage treatment method is to lead the sewage to the sump, adjust the pH of the last cell of the sump, use the first-level dissolved air pump to lift it to the first-level pressure dissolved air tank, and simultaneously suck in air and coagulation decolorizer, which will be in the first-level The first-level saturated air-dissolved water in the pressure dissolved air tank is suddenly released to the first-level air flotation tank to form the first-level treated water; the first-level treated water overflows into the buffer tank, and then the second-level dissolved air pump is used to control the pH to lift the first-level treated water Into the secondary pressure dissolving tank, inhale air and coagulation decolorizer at the same time, release the secondary saturated dissolved air water in the secondary pressure dissolving tank suddenly to the secondary air flotation tank to form secondary treated water and self-overflow to sedimentation The floating mud in the first and second air flotation tanks enters the floating mud tank, press-filtered into a filter cake, and the filtrate is led back to the sump. However, there are some high-concentration wastewater, such as pharmaceutical wastewater, whose main characteristics are: the concentration of various impurities such as organic matter, salt, and suspended solids in the sewage is high, the structure and composition are relatively complex, the pH value is unstable, and the CODcr is high. Poor, small amount of water and uneven drainage, large fluctuations, etc. In the prior art, it is still impossible to effectively treat these high-concentration wastewaters. Also, in the prior art, for both high-concentration wastewater and low-concentration wastewater, a separate treatment method is generally adopted, and joint and effective treatment cannot be performed. the

Utility model content

The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and propose an anaerobic biochemical sewage treatment system, which can jointly and effectively treat high-concentration wastewater and low-concentration wastewater. the

The technical scheme that the utility model solves above technical problem is:

An anaerobic biochemical sewage treatment system, including a high-concentration wastewater collection tank connected in sequence, a first lift pump, a coagulation reactor, a micro-electrolysis reactor, a Fenton oxidation reactor, a neutralization coagulation reactor, and a first sedimentation device, comprehensive sewage regulating tank, second lift pump, acidification hydrolysis reactor, intermediate temperature adjustment water tank, anaerobic feed pump, anaerobic biochemical reactor, anaerobic settler, aerobic biochemical reaction tank and second sedimentation tank, It also includes a grid and a water seal device; the high-concentration wastewater source is connected to the inlet of the high-concentration wastewater collection tank, the low-concentration wastewater source is connected to the inlet of the grid, and the outlet of the grid is connected to the comprehensive sewage adjustment tank;

The high-concentration wastewater in the high-concentration wastewater collection tank is lifted by the first lift pump into the coagulation reactor, and the wastewater undergoes coagulation reaction, sedimentation separation and pH adjustment in the coagulation reactor, and the effluent from the coagulation reactor enters the micro-electrolysis reaction In the micro-electrolysis reactor, the waste water undergoes a redox reaction with the micro-electrolyte to decompose and transform the organic impurities in the waste water. The effluent of the micro-electrolysis reactor enters the Fenton oxidation reactor, and the sub- The iron ions and the added hydrogen peroxide form a Fenton strong oxidant and undergo a strong oxidation reaction with the wastewater to further decompose and remove organic impurities in the wastewater. In the coagulation reactor, under the action of the neutralizing agent, the wastewater undergoes a neutralization coagulation reaction, and the effluent of the neutralization coagulation reactor enters the first precipitator for sedimentation and separation, and the effluent of the first precipitator enters the comprehensive sewage adjustment tank;

The low-concentration wastewater enters the comprehensive sewage regulating tank after passing through the grille. The low-concentration wastewater and the treated high-concentration wastewater undergo advanced microbial treatment, neutralization, adjustment and mixing in the comprehensive sewage regulating tank. The second lifting pump is lifted into the acidification hydrolysis reactor, and the waste water is decomposed into small molecule soluble organic matter and some inorganic substances in the acidification hydrolysis reactor, and the effluent of the acidification hydrolysis reactor flows into the intermediate temperature-adjusting water tank by itself, and the waste water The water temperature and pH value are adjusted in the intermediate temperature-adjusting water tank. The effluent of the intermediate temperature-adjusting water tank is lifted into the anaerobic biochemical reactor by the anaerobic feed pump, and the waste water is clarified while biodegrading in the anaerobic biochemical reactor. The effluent of the oxygen biochemical reactor enters the anaerobic precipitator, and the wastewater is separated by sedimentation in the anaerobic precipitator to remove part of the suspended impurities. The oxygen biochemical reaction removes most of the various pollutants in the water, and the effluent from the aerobic biochemical reaction tank enters the second settling tank for sedimentation and separation, and then discharges up to the standard;

The water sealing device is connected to the bottom of the anaerobic biochemical reactor, and the biogas produced by the anaerobic biochemical reactor is collected for biogas utilization.

In the technical solution of the utility model, the high-concentration wastewater is COD _Cr : 500-5000mg/L, pH value: 1-4, and the low-concentration wastewater is: COD _Cr : 300-500mg/L, pH value: 6-9.

The technical scheme that the utility model is further limited is:

In the aforementioned anaerobic biochemical sewage treatment system, the comprehensive sewage regulating tank includes a microbial bacteria pool, two inclined upward rapid flow channels, a inclined downward slow flow channel and two sludge sedimentation vertical biofilm pools. A partition wall is built in the sedimentation vertical biofilm tank to form an inlet tank and an outlet tank, and a biological filler frame is installed in the outlet tank; the outlet of the microbial bacteria tank is connected to the first sludge sedimentation upright organism through the first rapid flow channel The inlet tank of the biofilm tank, the outlet tank of the first sludge sedimentation vertical biofilm tank is connected to the water inlet tank of the second sludge sedimentation vertical biofilm tank through a slow flow channel, and the second sludge sedimentation vertical biofilm tank The effluent pool of the second rapid flow channel is connected to the second rapid flow channel, and the effluent water of the second rapid flow channel is lifted into the acidification hydrolysis reactor by the second lift pump.

The comprehensive sewage regulating tank is built according to the inclination angle of the rapid flow canal and the slow flow canal respectively, and the width of the canal is determined according to the size of the water flow. The microorganisms carried in the pool are separated from the moving and expanding water molecules, break away from the water flow, build nests and inhabit at the bottom of the canal, decompose and metabolize the residual organic matter in the water body, and provide the required material and energy for the new cells to reproduce. A large number of active biological bacteria are produced, and biofilms are naturally formed at the bottom of the canal to complete the advanced treatment of wastewater; a sludge sedimentation vertical biofilm pool is built at the junction between the rapid flow canal and the slow flow canal, and the vertical biofilm pool is built in the sludge sedimentation vertical biofilm. A partition wall is built in the biofilm pool to form an inlet pool and an outlet pool, and a biological filler frame is installed in the outlet pool; the sludge sedimentation vertical biofilm pool has two functions, one is the inlet pool collected by the rapid flow channel and the slow flow The sludge formed by the metabolism and death of microorganisms in the canal life cycle, and the second is the upright biofilm formed by the new microorganisms on the biological filler in the effluent tank, which decomposes the organic matter in the water; in this way, a flat natural biofilm is formed at the bottom of the canal The net, together with the upright biofilm body in the outlet pool of the sludge sedimentation vertical biofilm pool, forms a complete three-dimensional sewage treatment biofilm net body. This sewage treatment biofilm net body with metabolic functions contains a variety of microorganisms Bacteria, they feed on organic pollutants in the flowing sewage, and by ingesting organic matter, the sewage treatment biofilm network itself reproduces and proliferates, and the entire canal bottom forms a flat natural biofilm network, which is composed of upright biofilm bodies A complete three-dimensional sewage treatment biofilm system. the

In the aforementioned anaerobic biochemical sewage treatment system, the included angle between the rapid flow channel and the slow flow channel and the horizontal line is 45-65 degrees. the

The aforementioned anaerobic biochemical sewage treatment system also includes a flocculant dosing device, an oxidant dosing device and a neutralizing agent dosing device, and the flocculant dosing device is connected to the coagulation reactor as (coagulation Reactor) to add flocculant, the oxidant dosing device is connected to the Fenton oxidation reactor (Fenton oxidation reactor) to add oxidant, the neutralizer dosing device is connected to the neutralization coagulation Neutralizer is added to the reactor (neutralization coagulation reactor). the

In the aforementioned anaerobic biochemical sewage treatment system, the bottom of the anaerobic biochemical reactor is a sludge bed formed by a sludge layer, and above the sludge bed is a filter bed formed by an anaerobic biological filler layer, which consists of a sludge bed and a filter bed In the reaction area, a circulating water collection device is arranged above the reaction area, and a gas-liquid-solid three-phase separator is arranged above the circulating water collection device. the

The beneficial effects of the utility model are: the utility model adopts the biochemical and physical-chemical combination system and combined process of pretreatment + anaerobic biochemistry + aerobic biochemistry, which can effectively and comprehensively treat high-concentration wastewater and low-concentration wastewater. The quality of the sewage effluent is more stable, safe and reliable, and the rapid, low-energy and high-efficiency sewage treatment is realized. the

Description of drawings

Fig. 1 is a schematic diagram of equipment connection of the present invention. the

Figure 2 is a schematic diagram of the connection of the integrated sewage regulating tank. the

Detailed ways

Example 1

This embodiment is an anaerobic biochemical sewage treatment system. The equipment connection is shown in Figure 1, including a high-concentration wastewater collection pool, a first lift pump, a coagulation reactor, a micro-electrolysis reactor, and a Fenton oxidation reaction connected in sequence. device, neutralization coagulation reactor, first settler, comprehensive sewage adjustment tank, second lift pump, acidification hydrolysis reactor, intermediate temperature adjustment water tank, anaerobic feed pump, anaerobic biochemical reactor, anaerobic settler , the aerobic biochemical reaction tank and the second sedimentation tank, and also includes a grid and a water seal device; the high-concentration wastewater source is connected to the inlet of the high-concentration wastewater collection tank, the low-concentration wastewater source is connected to the inlet of the grid, and the outlet of the grid is connected to Integrated sewage conditioning tank.

The high-concentration wastewater in the high-concentration wastewater collection tank is lifted by the first lift pump into the coagulation reactor, and the wastewater undergoes coagulation reaction, sedimentation separation and pH adjustment in the coagulation reactor, and the effluent from the coagulation reactor enters the micro-electrolysis reaction In the micro-electrolysis reactor, the waste water undergoes a redox reaction with the micro-electrolyte to decompose and transform the organic impurities in the waste water. The effluent of the micro-electrolysis reactor enters the Fenton oxidation reactor, and the sub- The iron ions and the added hydrogen peroxide form a Fenton strong oxidant and undergo a strong oxidation reaction with the wastewater to further decompose and remove organic impurities in the wastewater. In the coagulation reactor, under the action of the neutralizing agent, the wastewater undergoes a neutralization coagulation reaction, the effluent of the neutralization coagulation reactor enters the first precipitator for sedimentation and separation, and the effluent of the first precipitator enters the comprehensive sewage adjustment tank. the

The low-concentration wastewater enters the comprehensive sewage regulating tank after passing through the grille. The low-concentration wastewater and the treated high-concentration wastewater undergo advanced microbial treatment, neutralization, adjustment and mixing in the comprehensive sewage regulating tank. The second lifting pump is lifted into the acidification hydrolysis reactor, and the waste water is decomposed into small molecule soluble organic matter and some inorganic substances in the acidification hydrolysis reactor, and the effluent of the acidification hydrolysis reactor flows into the intermediate temperature-adjusting water tank by itself, and the waste water The water temperature and pH value are adjusted in the intermediate temperature-adjusting water tank. The effluent of the intermediate temperature-adjusting water tank is lifted into the anaerobic biochemical reactor by the anaerobic feed pump, and the waste water is clarified while biodegrading in the anaerobic biochemical reactor. The effluent of the oxygen biochemical reactor enters the anaerobic precipitator, and the wastewater is separated by sedimentation in the anaerobic precipitator to remove part of the suspended impurities. The oxygen biochemical reaction removes most of the various pollutants in the water, and the effluent from the aerobic biochemical reaction tank enters the second settling tank for sedimentation and separation before being discharged up to standard. The water sealing device is connected to the bottom of the anaerobic biochemical reactor, and the biogas produced by the anaerobic biochemical reactor is collected for biogas utilization. the

The anaerobic biochemical sewage treatment system of this embodiment also includes a flocculant dosing device, an oxidant dosing device and a neutralizing agent dosing device, and the flocculant dosing device is connected to the coagulation reactor as (mixing Coagulation reactor) to add flocculant, the oxidant dosing device is connected to the Fenton oxidation reactor (Fenton oxidation reactor) to add oxidant, the neutralizer dosing device is connected to the neutralization mixture Add neutralizer to the coagulation reactor (neutralization coagulation reactor). the

The bottom of the anaerobic biochemical reactor used in this implementation is a sludge bed formed by a sludge layer, and above the sludge bed is a filter bed formed by an anaerobic biological filler layer. The sludge bed and the filter bed form a reaction zone. A circulating water collection device is installed above the area, and a gas-liquid-solid three-phase separator is installed above the circulating water collection device. the

The main equipment used in this embodiment is shown in the following table:

The comprehensive sewage regulating tank is shown in Figure 2, including a microbial bacteria pool 1, two sloping upward rapid flow channels 2a and 2b, a sloping downward slow flow channel 3, and two sludge sedimentation vertical biofilm pools 4a and 4b. The angle between the rapid flow channel and the slow flow channel and the horizontal line is 45-65 degrees. A partition wall is built in the sludge sedimentation vertical biofilm tank to form an inlet pool and an outlet pool, and a biological filler frame is installed in the outlet pool The water outlet of microbial bacteria pool 1 connects 2a to the water inlet pool 5a of the first sludge sedimentation vertical biofilm pool 4a through the first rapid flow channel, and the water outlet pool 6a of the first sludge sedimentation vertical biofilm pool 4a passes through the slow flow Canal 3 is connected to the water inlet tank 5b of the second sludge sedimentation vertical biofilm tank 4b, and the outlet pool 6b of the second sludge sedimentation vertical biofilm tank 4b is connected to the second rapid flow channel 2b, and the outlet water of the second rapid flow channel 2b passes through The second lift pump lifts into the acidification hydrolysis reactor. Respectively build rapid flow canals and slow flow canals according to the inclination angle, and the width of the canals is determined according to the size of the water flow. Its function is to re-oxygenate the water body through different water body flow velocities and the effect of falling water and splashing, so that the waste water is entrained from the microbial pool Microbial bacteria are separated from the moving and expanding water molecules, break away from the water flow, build nests and inhabit at the bottom of the canal, decompose and metabolize the residual organic matter in the water body, and provide the required material and energy for new cells to breed a large amount of activity Biological bacteria, naturally form biofilm at the bottom of the canal to complete the advanced treatment of wastewater; build a sludge sedimentation vertical biofilm pool at the junction between the rapid flow canal and the slow flow canal, and build a sludge sedimentation vertical biofilm pool in the sludge sedimentation vertical biofilm pool Build a partition wall to form an inlet pool and an outlet pool, and install a biological filler frame in the outlet pool; the sludge sedimentation tank has two functions, one is to collect the metabolic death of microorganisms in the rapid flow channel and the slow flow channel in the life cycle of the sludge sedimentation tank. The second is the upright biofilm formed by the new microorganisms on the biological filler in the effluent tank, which decomposes the organic matter in the water; in this way, a flat natural biofilm network is formed at the bottom of the canal, and the upright biofilm formed by the mud sediment The upright biofilm body of the outlet pool in the membrane pool forms a complete three-dimensional sewage treatment biofilm network body. This sewage treatment biofilm network body with metabolic functions contains a variety of microbial bacteria. They are in the flowing sewage. Taking organic pollutants as food, through the ingestion of organic matter, the sewage treatment biofilm network itself is multiplied and multiplied, forming a flat natural biofilm network at the bottom of the canal, and forming a complete three-dimensional sewage treatment system with the upright biofilm body biofilm system.

In this embodiment, high-concentration wastewater is COD _Cr : 500-5000 mg/L, pH value: 1-4, and low-concentration wastewater is: COD _Cr : 300-500 mg/L, pH value: 6-9.

In addition to the above embodiments, the utility model can also have other implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the utility model. the

Claims (5)

1. anaerobic biological Sewage treatment systems, it is characterized in that: comprise successively the high-concentration waste water collecting tank that connects, first lift pump, coagulation reactor, micro-electrolysis reactor, Fenton oxidation reactor, in and coagulation reactor, first settling vessel, composite wastewater equalizing tank, second lift pump, acidification hydrolization reactor, middle tone reservoir, anaerobism fresh feed pump, anaerobic biochemical reactor, anaerobism settling vessel, aerobic biochemical reaction tank and second settling tank, also comprise grid and water seal arrangement; The high-concentration waste water source connects the import of described high-concentration waste water collecting tank, and the low concentration wastewater source connects the import of described grid, and the outlet of described grid is connected to described composite wastewater equalizing tank;

High-concentration waste water in the described high-concentration waste water collecting tank is promoted by described first lift pump and enters described coagulation reactor, waste water carries out coagulating in described coagulation reactor, precipitate and separate and pH adjust, the water outlet of described coagulation reactor enters described micro-electrolysis reactor, waste water makes in the waste water organic impurity obtain decomposing and transforming with little ionogen generation redox reaction in described micro-electrolysis reactor, the water outlet of described micro-electrolysis reactor enters described Fenton oxidation reactor, ferrous ion in described Fenton oxidation reactor in the waste water and the hydrogen peroxide that adds form the Fenton strong oxidizer and and waste water strong oxidizing reaction takes place organic impurity is further decomposed and removes, the water outlet of the strong oxidation reactor of described Fenton enter described in and coagulation reactor, in described and in the coagulation reactor in and during waste water takes place under the effect of medicament and coagulating, in described and the water outlet of coagulation reactor enter described first settling vessel and carry out precipitate and separate, the water outlet of described first settling vessel enters described composite wastewater equalizing tank;

Low concentration wastewater enters described composite wastewater equalizing tank behind described grid, high-concentration waste water after low concentration wastewater and the processing carries out the microbial bacteria advanced treatment in described composite wastewater equalizing tank, neutralization, adjusting and mixed, the water outlet of described composite wastewater equalizing tank is promoted by described second lift pump and enters in the described acidification hydrolization reactor, waste water larger molecular organics in described acidification hydrolization reactor is broken down into small molecules dissolved organic matter and part inorganics, the water outlet of described acidification hydrolization reactor is from flowing to described middle tone reservoir, waste water is adjusted water temperature and pH value at described middle tone reservoir, the water outlet of described middle tone reservoir is promoted by described anaerobism fresh feed pump and enters in the described anaerobic biochemical reactor, waste water is clarified when giving birth to degraded in described anaerobic biochemical reactor, the water outlet of described anaerobic biochemical reactor enters described anaerobism settling vessel, waste water is being removed the part suspended impurity through precipitate and separate in described anaerobism settling vessel, the water outlet of described anaerobism settling vessel enters described aerobic biochemical reaction tank, all kinds of pollution impurity are most of in water removes through aerobic biochemical reaction in described aerobic biochemical reaction tank for waste water, and the water outlet of described aerobic biochemical reaction tank enters qualified discharge after the described second settling tank precipitate and separate;

Described water seal arrangement is connected on described anaerobic biochemical reactor bottom, and the natural pond life that described anaerobic biochemical reactor is produced is gathered into carries out biogas utilization.

2. anaerobic biological Sewage treatment systems as claimed in claim 1, it is characterized in that: described composite wastewater equalizing tank comprises a microbial bacteria pond, two torrent canals that are tilted to, one unhurried current canal and two upright biological bacteria membrane cisternas of sludge settling under being tilted to, in the upright biological bacteria membrane cisterna of sludge settling, build one partition wall and make it to form a pump sump and an outlet sump, the biologic packing material frame is installed in outlet sump; The water outlet in microbial bacteria pond is connected to the pump sump of the upright biological bacteria membrane cisterna of first sludge settling by the first torrent canal, the outlet sump of the upright biological bacteria membrane cisterna of first sludge settling is connected to the pump sump of the upright biological bacteria membrane cisterna of second sludge settling by the unhurried current canal, the outlet sump of the upright biological bacteria membrane cisterna of second sludge settling connects the described second torrent canal, and the water outlet of the described second torrent canal promotes by second lift pump and enters in the acidification hydrolization reactor.

3. anaerobic biological Sewage treatment systems as claimed in claim 2 is characterized in that: described torrent canal and unhurried current canal and horizontal angle are the 45-65 degree.

4. anaerobic biological Sewage treatment systems as claimed in claim 1 or 2, it is characterized in that: also comprise flocculation agent chemicals dosing plant, oxygenant chemicals dosing plant and neutralizing agent chemicals dosing plant, described flocculation agent chemicals dosing plant is connected on the described coagulation reactor and adds flocculation agent for it, described oxygenant chemicals dosing plant is connected on the described Fenton oxidation reactor it and adds oxygenant, described neutralizing agent chemicals dosing plant be connected on described in and be its interpolation neutralizing agent on the coagulation reactor.

5. anaerobic biological Sewage treatment systems as claimed in claim 1 or 2, it is characterized in that: the Sludge Bed of described anaerobic biochemical reactor bottom for forming by sludge blanket, it above described Sludge Bed the filter bed that forms by the anaerobe packing layer, described Sludge Bed and filter bed anabolic reaction district, the circulation captation is set above described reaction zone, above described circulation captation, gas-liquid-solid three-phase separator is set.

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