CN105174621A - System and method for treating wastewater by applying activated sludge - Google Patents
System and method for treating wastewater by applying activated sludge Download PDFInfo
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- CN105174621A CN105174621A CN201510590269.4A CN201510590269A CN105174621A CN 105174621 A CN105174621 A CN 105174621A CN 201510590269 A CN201510590269 A CN 201510590269A CN 105174621 A CN105174621 A CN 105174621A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention relates to the technical field of sewage treatment and discloses a system for treating wastewater by applying activated sludge. The system comprises a feed hopper (1), a homogenizing tank (2), a biogas tank (3), an up-flow anaerobic sludge bed (4), an activated sludge reaction tank (5), a microelectrolysis reactor (10), a baffled biological aerated filter (BBAF) (6) and an ozone disinfection tank (7), which are connected in sequence, wherein the biogas tank is connected with a sludge thickening tank (8). The invention also discloses a method for treating wastewater by applying activated sludge. The method comprises anaerobic digestion treatment, treatment by adopting an activated sludge method, microelectrolysis reaction, biochemical treatment with the BBAF and ozone disinfection. The system and the method have the beneficial effects that the process is simple; the concentration gradient in the reaction process is large, so that sludge bulking is not easy to happen; the system has strong load impact resistance and good treatment effects; and the simultaneous denitrification and dephosphorization effects of the BBAF are obvious by adjusting the cycle of operation and controlling the working procedure time length.
Description
Technical field
The present invention relates to technical field of sewage, relate to the system using active sludge treatment waste water, particularly relate to the method using active sludge treatment waste water.
Background technology
Livestock breeding wastewater suspended substance is many, ammonia nitrogen concentration is high, organic concentrations is high, stink is large, with regard to its quantity discharged, its organic quantity discharged is 2 times of industry and urban life waste discharge amount, but also containing characteristics such as the pathogenic agent excreted with livestock and poultry, intractability is large and be difficult to qualified discharge after traditional technology process.Breeding wastewater adopts the biological treatments such as natural ecological resource technology, Anaerobic Methods in Treating, aerobic treatment technology, combination treatment technology at present mostly.For single aerobic, anaerobic treatment effect is unsatisfactory, the administering method effect of current animal farm wastewater is bad.
Summary of the invention
The present invention is directed to the shortcoming of prior art, disclose a kind of system using active sludge treatment waste water, also disclose the method having particularly related to and used active sludge treatment waste water.
In order to solve the problems of the technologies described above, the present invention is solved by following technical proposals:
Use the system of active sludge treatment waste water, comprise hopper connected successively, homogenate pond, methane-generating pit, upflow anaerobic sludge blanket reactor, activated sludge reaction pond, micro-electrolysis reactor, baffled biological aerated filter and ozonization pond, methane-generating pit is connected with sludge thickener; Methane-generating pit is also connected with biogas and only stores airing system, and biogas is only store airing system and comprised air water separator, methane-desulfurizing device, the first spark arrester, gas-holder successively, and air water separator also connects biogas supercharging device, the second spark arrester, waste-heat recovery device.
Activated sludge reaction pond (also known as SBR) in the present invention is the active sludge sewage treatment device run by intermittent aeration mode, used sequencing batch active sludge, SBR technique is the operation whole process being realized traditional activated sludge process by temporal alternate run.The present invention only has a SBR pond, but has the function of equalizing tank, aeration tank and settling tank simultaneously.Operational process is divided into into water, aeration, precipitates, strains water, idle double teacher.In the cycle of operation, the working time in each stage, the change of reactor mixeding liquid volume and running status etc. can require to grasp flexibly according to the character of concrete sewage, effluent quality and operation function.
Biogas is only store airing system and is adopted low pressure desulfurization and high pressure dehydration technique, can be widely used in biogas, natural gas gathering, storage and application, can realize adjustable constant voltage air feed, easily control, easy to use, uses gas effect stability.
By being discharged by water after the sterilization of ozonization pond, it effectively can kill a large amount of microorganism in water and bacterium, improves purification of waste water intensity again.
Be provided with water-in bottom micro-electrolysis reactor, upside is provided with water outlet, and micro-electrolysis reactor adopts bottom water inlet, top water-out manners, and iron and carbon are filled in inside, pond.Light electrolysis be utilize iron, charcoal has microbattery reaction, throwing out, to reduce the content of COD and decolorizing effect obvious.
As preferably, baffled biological aerated filter comprises two-stage aerated biological filter and water hole, and two-stage aerated biological filter is communicated with by the water hole of downside; Two-stage aerated biological filter is equipped with packing layer and the first aeration tube, and packing layer the first packing layer and the second packing layer successively from top to bottom, the first packing layer is fixed with microorganism and/or biological enzyme.The present invention completes nitrification and denitrification effect in same BAF, achieves COD, SS, NH
3the synchronous removal of-N and TN.Two-stage aerated biological filter also comprises and is located at catch net on the upside of packing layer, is located at supporting layer on the downside of packing layer; Be located at the filter plate on the downside of supporting layer, between supporting layer and filter plate, be provided with aeration tube.Be provided with aeration tube between supporting layer and filter plate, adopt perforated pipe gas distribution, by the even gas distribution of device, solve that bias current, filler are uneven, tracheae holds susceptible to plugging problem.It is protective layer on the upside of catch net.Also comprise back-purge system, back-purge system comprises aeration tube, backwash tube, back flushing water leg, back flushing water shoot, backwash tube is located in supporting layer, first step BAF is also communicated with by backwash tube with the bottom of second stage BAF, back flushing water leg is located at the upside of first step BAF, and back flushing water shoot is located at the upside of second stage BAF.
As preferably, two-stage aerated biological filter is first step BAF and second stage BAF, is provided with water inlet pipe on the upside of first step BAF, is provided with rising pipe on the upside of the BAF of the second stage.
As preferably, the first packing layer is the urethane bio-sponge filler being fixed with microorganism and/or biological enzyme, and the second packing layer is zeolite and granulated active carbon.The present invention, by the combination of different filtrate, enhances the synchronous removal effect of multiple pollutant, improves system capacity of resisting impact load, greatly reduces the possibility hardening and occur.A. zeolite has the feature of selective adsorption ammonia nitrogen, and its surface also can form microbial film (becoming biozeolite) and the removal ability of ammonia nitrogen is improved simultaneously.Zeolite and granulated active carbon combine, and extend the work period of zeolite, make the biological growth on granulated active carbon good, can ensure when there not being long-term ammonia nitrogen in high density to impact zeolite long-time running and without the need to regenerating, economic and reliable.B. be fixed with microorganism and/or biological enzyme in urethane bio-sponge filler, be placed in the packing layer of upside (i.e. the first packing layer), to remove SS and other pollutents further.After fixation of microbe and/or biological enzyme, urethane bio-sponge filling carrier density is close to the density of water, and have larger specific surface area, biofilm is easy, thus biological load amount is large, exceeds more than 5 times than existing effluent purification method; And microbial film (i.e. microorganism and/or biological enzyme) upgrades than very fast, thus microorganism (i.e. microorganism and/or biological enzyme) has higher activity, substantially increases processing efficiency and wastewater treatment efficiency.C. due to the combination of multimedium filler, make filter material layer present semifixed semifluid state, flowing carrier constantly carries out contacting with bubble and constantly cuts, and thus its oxygen-transfer efficiency is high, is conducive to accelerating organic oxidation rate.
As preferably, be also provided with roots blower, activated sludge reaction pond comprises the second aeration tube, and the first aeration tube is connected same roots blower with the second aeration tube.
As preferably, upflow anaerobic sludge blanket reactor is provided with triphase separator.Upflow anaerobic sludge blanket reactor is provided with triphase separator, bottom water inlet, top water outlet, and useless Organic substance in water fully contacts with anaerobion, and be conducive to organic decomposition, waste water enters activated sludge reaction pond and continues organic degraded.
As preferably, methane-generating pit top is provided with backflow sprinkling system and water outlet, is provided with whipping appts and mud discharging mouth bottom methane-generating pit, and mud discharging mouth connects sludge thickener.Be provided with whipping appts bottom methane-generating pit, make the organic waste water of high density groove before anaerobic fermentation system form the state mixed completely, to reach good removal effect.Methane-generating pit top is provided with backflow sprinkling system, stirs to reach internal recycle and prevents scum silica frost from crusting.Methane-generating pit top is provided with water outlet, and bottom is provided with mud discharging mouth, and the sediment produced in anaerobic digestion process is discharged to sludge thickener by mud discharging mouth, takes away after precipitation concentration through sludge pump.
As preferably, between methane-generating pit and upflow anaerobic sludge blanket reactor, be provided with equalizing tank.
Use the method for active sludge treatment waste water, comprise the following steps,
A. Anaerobic Digestion:
Breeding wastewater enters homogenate pond by hopper, under the whipping appts stirring action in homogenate pond after allotment evenly, passes into methane-generating pit;
Under the effect of the whipping appts of breeding wastewater in methane-generating pit, backflow sprinkling system, form admixture, the sediment produced in anaerobic digestion process is discharged to sludge thickener by mud discharging mouth, sediment is taken away through sludge pump after precipitation concentration, and remaining breeding wastewater then passes into upflow anaerobic sludge blanket reactor; Whipping appts makes the organic waste water of high density form the state mixed completely at front groove, to reach good removal effect.Backflow sprinkling system, stirs to reach internal recycle and prevents scum silica frost from crusting.
Organic substance decomposing in remaining breeding wastewater is become methane and carbon dioxide with under the acting in conjunction of methanogen by breeding wastewater anerobe, oxygen bacterium of holding concurrently in upflow anaerobic sludge blanket reactor, collects the methane and carbon dioxide produced; Upflow anaerobic sludge blanket reactor is medium loading area, adopts UASB reactor.Upflow anaerobic sludge blanket reactor is provided with triphase separator, bottom water inlet, top water outlet, organic substance decomposing is become methane and carbon dioxide (biogas main component) under anerobe, the hold concurrently absorption of oxygen bacterium, fermentation, methane phase acting in conjunction by waste water in anaerobic pond, the B/C value of waste water is improved by anaerobic treatment, improve the biodegradability of waste water, the methane and carbon dioxide of generation collects to obtain biogas by gas collector.
B. Wastewater Treated by Activated Sludge Process:
Breeding wastewater then enters activated sludge reaction pond, under the effect of equalizing tank, aeration tank and settling tank, decomposing organic pollutant, mud is separated with water; Utilize the biological flocculation and precipitation of active sludge, adsorption and oxidation effect, to decompose the organic pollutant removed in waste water.Then make mud be separated with water, most of mud is back to aeration tank again, and redundance then discharges Sludge System.This operational process is divided into into water, aeration, precipitates, strains water, idle double teacher.
C. micro-electrolysis reaction:
Breeding wastewater then enters micro-electrolysis reactor bottom micro-electrolysis reactor, redox reaction occurs, solvable Substance Transformation is become indissoluble or slightly soluble material, by throwing out precipitation, removing, macromolecular substance is decomposed into small-molecule substance;
Micro-electrolysis reactor adopts water inlet top, bottom water-out manners, and iron and carbon are filled in inside, pond.Micro electrolysis tech be utilize iron, charcoal have microbattery reaction, throwing out.In micro-electrolysis reactor, reaction product has very high chemically reactive, at anode, and the nascent state Fe of generation
2+; At negative electrode, the activity [H] of generation, utilizes the potential difference that the two poles of the earth produce, and in waste water, many pollutent component generation redox reactions, make solvable Substance Transformation become indissoluble or slightly soluble material, by the removing of throwing out precipitation; Macromolecular substance is made to be decomposed into small-molecule substance; Make the mass transfer of some bio-refractory become easy to handle material, while improving the biodegradability of waste water, colourity is also reduced.
D. baffled biological aerated filter biochemical treatment:
Organic waste water after micro-electrolysis reaction enters baffled biological aerated filter, is purified organic waste water by oxidation degradation effect, removes COD, SS, ammonia nitrogen and phosphorus further; Baffled biological aerated filter (BBAF) fully to use for reference time the design techniques to stream Gas biological filter, Up-flow Biological Aerated Filter method, SBR method, AB method, contact oxidation method, biomembrance process, manual rapid infiltration land's method, settlement separate method, the fast filter method that feeds water etc. 10, integrate aeration, fast filtering, suspended substance retain, two expose to the sun two heavy, regularly recoil.
E. ozonization:
Waste water after baffled biological aerated filter biochemical treatment, water outlet again through ozonization process, the breeding wastewater after being purified.Biogas stores airing system only: can produce a large amount of biogas in the anaerobic digestion stage, only store airing system by pipeline access biogas after unified collection, this system comprises biogas gas-water separator, methane-desulfurizing device, gas-holder, biogas supercharging device, sewage gas flame arrestor, waste-heat recovery device etc.Marsh gas purifying adopts low pressure desulfurization and high pressure dehydration technique, whole system has concentrated the advantage of low pressure wet type cabinet and waterless gas-holder, biogas, natural gas gathering, storage and application can be widely used in, adjustable constant voltage air feed can be realized, easily control, easy to use, use gas effect stability.Biogas can be fallen be used for generating electricity, reduce cost for wastewater treatment.
Compared with prior art, beneficial effect of the present invention is:
Waste water enters in homogenate pond by hopper, anaerobic fermentation system is squeezed under stirring after allotment evenly, methane-generating pit and upflow anaerobic sludge blanket reactor are referred to as anaerobic fermentation system, and anaerobic fermentation system takes front groove (i.e. methane-generating pit) and pit (i.e. upflow anaerobic sludge blanket reactor) design.Methane-generating pit is high load region.Be provided with whipping appts bottom methane-generating pit, make the organic waste water of high density groove before anaerobic fermentation system form the state mixed completely, to reach good removal effect.Methane-generating pit top is provided with backflow sprinkling system, stirs to reach internal recycle and prevents scum silica frost from crusting.Methane-generating pit top is provided with water outlet, and bottom is provided with mud discharging mouth, and the sediment produced in anaerobic digestion process is discharged to sludge thickener by mud discharging mouth, takes away after precipitation concentration through sludge pump.Upflow anaerobic sludge blanket reactor is medium loading area, is provided with triphase separator, bottom water inlet, top water outlet, and useless Organic substance in water fully contacts with anaerobion, and be conducive to organic decomposition, waste water enters activated sludge reaction pond and continues organic degraded.Activated sludge reaction pond only has a SBR pond, but has the function of equalizing tank, aeration tank and settling tank simultaneously.Operational process is divided into into water, aeration, precipitates, strains water, idle double teacher, and then waste water enters micro-electrolysis reactor, and micro-electrolysis reactor adopts bottom water inlet, top water-out manners, and iron and carbon are filled in inside, pond.Light electrolysis be utilize iron, charcoal has microbattery reaction, throwing out, to reduce the content of COD and decolorizing effect obvious.Then baffled biological aerated filter (BBAF) is entered, baffled biological aerated filter (BBAF) integrates aeration, fast filtering, suspended substance retain, two expose to the sun two heavy, regularly recoil, it is the circulation denitrogenation dephosphorizing reactor of a kind of typical high loading, submerged, immobilization biological bed, sewage after process is better than emission standard, can realize Treated sewage reusing.
The present invention includes hopper connected successively, homogenate pond, methane-generating pit, upflow anaerobic sludge blanket reactor, activated sludge reaction pond, micro-electrolysis reactor, baffled biological aerated filter and ozonization pond, methane-generating pit is connected with sludge thickener, technique is simple, reaction process concentration gradient is large, not easily sludge bulking occurs; Anti-load impact ability is strong, and treatment effect is good; By adjust operation cycle and the length controlling each activity time, BBAF denitrogenation simultaneously, phosphor-removing effect obviously, and do not need additionally to increase reactor.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of baffled biological aerated filter.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
Embodiment 1
Use the system of active sludge treatment waste water, as shown in Figure 1-2, comprise hopper 1 connected successively, homogenate pond 2, methane-generating pit 3, upflow anaerobic sludge blanket reactor 4, activated sludge reaction pond 5, micro-electrolysis reactor 10, baffled biological aerated filter 6 and ozonization pond 7, methane-generating pit is connected with sludge thickener 8; Methane-generating pit 3 is also connected with biogas and only stores airing system, biogas is only store airing system and is comprised air water separator 91, methane-desulfurizing device 92, first spark arrester 931, gas-holder 94 successively, and air water separator 91 also connects biogas supercharging device 95, second spark arrester 932, waste-heat recovery device 96.
Embodiment 2
Use the system of active sludge treatment waste water, as shown in Figure 1-2, comprise hopper 1 connected successively, homogenate pond 2, methane-generating pit 3, upflow anaerobic sludge blanket reactor 4, activated sludge reaction pond 5, micro-electrolysis reactor 10, baffled biological aerated filter 6 and ozonization pond 7, methane-generating pit is connected with sludge thickener 8, is provided with equalizing tank 11 between methane-generating pit 3 and upflow anaerobic sludge blanket reactor 4.Methane-generating pit 3 is also connected with biogas and only stores airing system, biogas is only store airing system and is comprised air water separator 91, methane-desulfurizing device 92, first spark arrester 931, gas-holder 94 successively, and air water separator 91 also connects biogas supercharging device 95, second spark arrester 932, waste-heat recovery device 96.
Baffled biological aerated filter 6 comprises two-stage aerated biological filter 61 and water hole 62, and two-stage aerated biological filter 61 is communicated with by the water hole 62 of downside; Two-stage aerated biological filter 61 is equipped with packing layer and the first aeration tube 63, and the first packing layer 64 and the second packing layer 65, first packing layer 64 are fixed with microorganism and/or biological enzyme to packing layer successively from top to bottom.Two-stage aerated biological filter 61 is first step BAF 611 and second stage BAF 612, is provided with water inlet pipe 66 on the upside of first step BAF 611, is provided with rising pipe 67 on the upside of second stage BAF 612.First packing layer 64 is for being fixed with the urethane bio-sponge filler of microorganism and/or biological enzyme, and the second packing layer 65 is zeolite and granulated active carbon.
Also be provided with roots blower, activated sludge reaction pond 5 comprises the second aeration tube, and the first aeration tube 64 is connected same roots blower with the second aeration tube.
Methane-generating pit 3 top is provided with backflow sprinkling system and water outlet, is provided with whipping appts and mud discharging mouth bottom methane-generating pit 3, and mud discharging mouth connects sludge thickener 8.Upflow anaerobic sludge blanket reactor 4 is provided with triphase separator.
Embodiment 3
Use the method for active sludge treatment waste water, comprise the following steps,
A. Anaerobic Digestion:
Breeding wastewater enters homogenate pond 2 by hopper 1, under the whipping appts stirring action in homogenate pond 2 after allotment evenly, passes into methane-generating pit 3;
Under the effect of the whipping appts of breeding wastewater in methane-generating pit 3, backflow sprinkling system, form admixture, the sediment produced in anaerobic digestion process is discharged to sludge thickener 8 by mud discharging mouth, sediment is taken away through sludge pump after precipitation concentration, and remaining breeding wastewater then passes into upflow anaerobic sludge blanket reactor 4;
Organic substance decomposing in remaining breeding wastewater is become methane and carbon dioxide with under the acting in conjunction of methanogen by breeding wastewater anerobe, oxygen bacterium of holding concurrently in upflow anaerobic sludge blanket reactor 4, collects the methane and carbon dioxide produced;
B. Wastewater Treated by Activated Sludge Process:
Breeding wastewater then enters activated sludge reaction pond 5, under the effect of equalizing tank, aeration tank and settling tank, decomposing organic pollutant, mud is separated with water;
C. micro-electrolysis reaction:
Breeding wastewater then enters micro-electrolysis reactor 10 bottom micro-electrolysis reactor 10, redox reaction occurs, solvable Substance Transformation is become indissoluble or slightly soluble material, by throwing out precipitation, removing, macromolecular substance is decomposed into small-molecule substance;
D. baffled biological aerated filter biochemical treatment:
Organic waste water after micro-electrolysis reaction enters baffled biological aerated filter 6, is purified organic waste water by oxidation degradation effect, removes COD, SS, ammonia nitrogen and phosphorus further;
E. ozonization:
Waste water after baffled biological aerated filter biochemical treatment, water outlet again through ozonization process, the breeding wastewater after being purified.
In a word, the foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (9)
1. use the system of active sludge treatment waste water, it is characterized in that: comprise be connected successively hopper (1), homogenate pond (2), methane-generating pit (3), upflow anaerobic sludge blanket reactor (4), activated sludge reaction pond (5), micro-electrolysis reactor (10), baffled biological aerated filter (6) and ozonization pond (7), methane-generating pit is connected with sludge thickener (8); Methane-generating pit (3) is also connected with biogas and only stores airing system, biogas is only store airing system and is comprised air water separator (91), methane-desulfurizing device (92), the first spark arrester (931), gas-holder (94) successively, and air water separator (91) also connects biogas supercharging device (95), the second spark arrester (932), waste-heat recovery device (96).
2. the system of utilization active sludge treatment waste water according to claim 1, it is characterized in that: baffled biological aerated filter (6) comprises two-stage aerated biological filter (61) and water hole (62), two-stage aerated biological filter (61) is communicated with by the water hole (62) of downside; Two-stage aerated biological filter (61) is equipped with packing layer and the first aeration tube (63), packing layer the first packing layer (64) and the second packing layer (65) successively from top to bottom, the first packing layer (64) is fixed with microorganism and/or biological enzyme.
3. the system of utilization active sludge treatment waste water according to claim 2, it is characterized in that: two-stage aerated biological filter (61) is first step BAF (611) and second stage BAF (612), first step BAF (611) upside is provided with water inlet pipe (66), and second stage BAF (612) upside is provided with rising pipe (67).
4. the system of utilization active sludge treatment waste water according to claim 2; it is characterized in that: the first packing layer (64) is for being fixed with the urethane bio-sponge filler of microorganism and/or biological enzyme, and the second packing layer (65) is zeolite and granulated active carbon.
5. the system of utilization active sludge treatment waste water according to claim 2, it is characterized in that: be also provided with roots blower, activated sludge reaction pond (5) comprises the second aeration tube, and the first aeration tube (64) is connected same roots blower with the second aeration tube.
6. the system of utilization active sludge treatment waste water according to claim 1, is characterized in that: upflow anaerobic sludge blanket reactor (4) is provided with triphase separator.
7. the system of utilization active sludge treatment waste water according to claim 1, it is characterized in that: methane-generating pit (3) top is provided with backflow sprinkling system and water outlet, methane-generating pit (3) bottom is provided with whipping appts and mud discharging mouth, and mud discharging mouth connects sludge thickener (8).
8. the system of utilization active sludge treatment waste water according to claim 1, is characterized in that: be provided with equalizing tank (11) between methane-generating pit (3) and upflow anaerobic sludge blanket reactor (4).
9. use the method for active sludge treatment waste water, it is characterized in that: comprise the following steps,
A. Anaerobic Digestion:
Breeding wastewater enters homogenate pond (2) by hopper (1), under the whipping appts stirring action of homogenate pond (2) after allotment evenly, passes into methane-generating pit (3);
Under the effect of the whipping appts of breeding wastewater in methane-generating pit (3), backflow sprinkling system, form admixture, the sediment produced in anaerobic digestion process is discharged to sludge thickener (8) by mud discharging mouth, sediment is taken away through sludge pump after precipitation concentration, and remaining breeding wastewater then passes into upflow anaerobic sludge blanket reactor (4);
Organic substance decomposing in remaining breeding wastewater is become methane and carbon dioxide with under the acting in conjunction of methanogen by breeding wastewater anerobe, oxygen bacterium of holding concurrently in upflow anaerobic sludge blanket reactor (4), collects the methane and carbon dioxide produced;
B. Wastewater Treated by Activated Sludge Process:
Breeding wastewater then enters activated sludge reaction pond (5), under the effect of equalizing tank, aeration tank and settling tank, decomposing organic pollutant, mud is separated with water;
C. micro-electrolysis reaction:
Breeding wastewater then enters micro-electrolysis reactor (10) from micro-electrolysis reactor (10) bottom, there is redox reaction, solvable Substance Transformation is become indissoluble or slightly soluble material, by throwing out precipitation, removing, macromolecular substance is decomposed into small-molecule substance;
D. baffled biological aerated filter biochemical treatment:
Organic waste water after micro-electrolysis reaction enters baffled biological aerated filter (6), is purified organic waste water by oxidation degradation effect, removes COD, SS, ammonia nitrogen and phosphorus further;
E. ozonization:
Waste water after baffled biological aerated filter biochemical treatment, water outlet again through ozonization process, the breeding wastewater after being purified.
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| CN108947102A (en) * | 2018-06-22 | 2018-12-07 | 南京大学 | It is a kind of for sewage deep denitrogenation and the device and its operation method of toxicity reduction |
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