CN101698555A - Integrated up-flow reactor and advanced treatment method of fermentation industrial effluent - Google Patents
Integrated up-flow reactor and advanced treatment method of fermentation industrial effluent Download PDFInfo
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Abstract
The invention discloses an integrated up-flow reactor and an advanced treatment method of fermentation industrial effluent, belonging to effluent treatment field. The upper part of the reactor is an aerobic fluidized bed system, the lower part is an anaerobic filter system, the intermediate transition zone is designed to be a connecting part which has a tri-phase separation function and organically combines the upper part and the lower part together. In the reactor, the concentration of biological solid is high and the retention time of biological solid is long, therefore the reactor is suitable for treating secondary biochemical treatment effluent of fermentation industrial effluent which has high salinity and is difficult to be biodegraded; sludge output of each system is low, and the residual sludge generated in the aerobic zone enters to the transition zone and the anaerobic zone to be further treated, the overall sludge output of the reactor is low, and simultaneously, the reactor contains rich biological species which act on organics difficult to be degraded jointly and promote the degradation thereof. The integrated reactor has low energy consumption, less land occupation, convenient operation, load impact resistance and high treatment efficiency, thereby being applicable to the advanced treatment of fermentation industrial effluent.
Description
Technical field
The present invention relates to a kind of waste water treatment reactor and be applied to the method for wastewater from fermentation industry advanced treatment, be meant a kind of integrated up-flow reactor that designs in conjunction with MBBR and AF technology and the method that is used for the advanced treatment wastewater from fermentation industry thereof in particular.
Background technology
China's fermentation industry prosperity, the level and the scale of industries such as yeast, alcohol, citric acid, beer, vitamins C and monosodium glutamate occupy prostatitis, the world, are the important mainstay industries of China.Yet fermentation industry can produce and discharge a large amount of high concentration hard-degraded organic waste waters in process of production, must deal carefully with waste water, qualified discharge, could guarantee the sustainable development of fermentation industry.Wastewater from fermentation industry has similar water quality characteristic: high density, high salinity, high chroma, it is big to contain the fluctuation of hardly degraded organic substance and water quality and quantity in the waste water.Present domestic wastewater from fermentation industry mainly is that core technology is handled with the biological treatment, comprises anaerobism, aerobic or the two tandem process etc., and effluent index can reach the requirement of " integrated wastewater discharge standard GB 8978-1996 " secondary standard substantially.Yet, China's wastewater discharge standard increasingly stringent, fermentation industry every profession and trade discharge of wastewater new standard is put into effect in succession, the COD emission standard has been brought up to 120mg/L, can't satisfy the new standard requirement and add aerobic traditional biological treatment process based on anaerobism, can't remove the solvability hardly degraded organic substance that contains in the water outlet, and these organism also contain chromophoric group and auxochrome group, cause effluent color dilution higher and related and deposit with COD.Decolouring technology mainly contains Coagulation Method, advanced oxidation processes, absorption method, embrane method etc. at present, but these methods all have limitation separately, be difficult for regeneration etc. as secondary pollution, with high costs, sorbent material, and the color-producing bodies in the fermentation waste water biochemical treatment water outlet is the solvability hardly degraded organic substance, therefore above-mentioned physico-chemical process and be not suitable for it is handled.Consider that the colourity of fermentation waste water biochemical treatment water outlet is related with COD and deposit, and salinity height in these organism tool bio-refractories and the water, therefore, exploitation enhanced biological treatment technology is effective to its biodegrade and the solution route of tool economy, practicality, can remove COD and colourity synchronously, guarantee that fermentation industry satisfies the requirement of discharge of wastewater new standard, realize stablizing sustainable development.
Because the organism in the fermentation waste water biochemical treatment water outlet has bio-refractory, and salinity is very high in the water that anaerobic bacterium is had big restraining effect, so anaerobic reactor must keep high sludge concentration and long sludge retention time, could effective degradation of organic substances.Upflow type anaerobic biological filter (AF) is a kind of high efficiency anaerobic reactor, and filler is set in the reactor, can form microbial film at filling surface, also can form biological sludge in the space reactor simultaneously.Compare with traditional anaerobic reactor, AF has biosolids concentration height, the residence time is long, surplus sludge volume is few, operation starts advantage fast, anti impulsion load, biological domestication of easier realization and organic degraded under high salinity.Aerobic moving bed biofilm reactor (MBBR) treatment process is a kind of high-efficiency aerobic technology, add the floating stuffing of certain volume ratio in the reactor, filling surface sessile organism film makes by aeration to be fluidized state in the reactor, and solid, liquid, gas can fully contact.Compare the advantage that MBBR has resistance to overload shock, sludge concentration is higher, head loss is little, need not back flushing, generally need not reflux, denitrogenation dephosphorizing is respond well, biological domestication of easier realization and organic degraded under high salinity with other aerobic process.
The biological wastewater treatment integrated reactor has less investment, takes up an area of less, advantages such as energy consumption is little, convenient management, investigator's favor extremely both at home and abroad in recent years.(Xue Jia such as Xue Jia, Huang Jun, Li Yijun. the research of anaerobic aerobic integratedization bioreactor for treatment fermentation waste water. use and the environmental organism journal, 2007,13 (3): 414～418) Yan Jiukaifa anaerobic aerobic integratedization bio-reactor, whole device is the concentric drums form, and inner core is the anaerobic grain sludge expanded bed, urceolus is aerobic three-phase fluidized bed, is divided into the up-flow district, falls stream district and negative area.This reactor strong shock resistance, when handling the organic fermentation waste water of high density, the COD clearance can reach more than 90%.But the mud of its aerobic zone still need efflux processing, and the ability of anaerobic zone anti-shock loading a little less than, start time is long.(Jiang Zhanpeng such as Jiang Zhanpeng, Zhong Yanmin, Shi Shaoqi. integrated A/O biofilm reactor is handled sanitary sewage. Chinese water supply and drainage, 2002,18 (8): 9～12) She Ji flow lifting type integrated A/O biofilm reactor, it is cylindric that device is, the bottom is for adopting the oxygen-starved area of Ball-type packing, top is for adopting the aerobic zone of semi soft packing, and when keeping basicity suitable in certain reflux ratio and the reactor, denitrification effect is well stablized.(R.Del Pozo such as Del Pozo R, V.Diez, Integrated anaerobic-aerobicfixed-film reactor for slaughterhouse wastewater treatment.WaterResearch, 2005 (39): 1114-1122) adopt a kind of integral anaerobic-aerobic fixed-film reactor to handle slaughterhouse water, fixedly filler in the reactor is made up of the vertical Wave form pipeline of PVC of 1400 long 2m internal diameter 22mm, closure by the control pipeline is determined the volume ratio of anaerobic zone and aerobic zone, and by the aeration zone of transition with anaerobic zone and aerobic distinguishing.Under underload, has good organic matter removal efficient and the efficient of nitrogen removal preferably.But, above-mentioned integrated reactor is applied to handle high density more and is easy to biodegradable trade effluent, or it is more stable to be used for handling properties, the middle and small scale sanitary sewage and the minority Small Scale Industry waste water of middle lower concentration, bias toward removal to COD and nitrogen, and start time is long, there is more excess sludge to produce, and in high salinity, than high chroma, based on the solvability hardly degraded organic substance, the process field of the wastewater from fermentation industry secondary biochemical water outlet that the water quality and quantity fluctuation is big yet there are no with strong points, start fast, easily domestication, the residence time is short, the exploitation of the integrated bioreactor that surplus sludge volume is few and application.
Summary of the invention
1. invent the technical problem that will solve
Existing advanced treatment technology and integrated reactor can not the good treatment high salinity, than high chroma, based on the solvability hardly degraded organic substance, the wastewater from fermentation industry biochemical treatment water outlet that the water quality and quantity fluctuation is big, the present invention proposes a kind of integrated reactor that is used for the wastewater from fermentation industry advanced treatment, can handle the water outlet after wastewater from fermentation industry process anaerobism adds aerobic secondary biochemical treatment, at its high salinity (greater than 5000mg/L), colourity higher (extension rate method 100-150 doubly), COD lower (less than 400mg/L), BOD/COD value low (less than 0.25), COD mainly is made of the solvability hardly degraded organic substance, colourity and the water quality characteristics deposited related with COD, the present invention can remove COD and colourity synchronously, and can start fast, easily domestication, hydraulic detention time is short, surplus sludge volume is few.
2. technical scheme
Principle of the present invention: with AF and the two combination coupling of MBBR, with AF hardly degraded organic substance in the wastewater from fermentation industry biochemical treatment water outlet and color-producing bodies are degraded earlier, improve the biodegradability and the readily degradable of water outlet, again with organism and denitrogenation dephosphorizing in the further degradation water of MBBR, can realize the synchronous removal of COD and colourity fully, make water outlet reach the requirement of new standard.The mechanism of degradation in bio-reactor according to ecological principle and hardly degraded organic substance, hardly degraded organic substance is progressively degraded under the combined action of different microorganisms population, therefore, the coenosis of different states is many more in reactor, and its potentiality of handling hardly degraded organic substance matter are just big more
Technical scheme of the present invention is:
Integrated up-flow reactor is characterized in that this reactor is made up of upper, middle, and lower part, and top is MBBR, and the bottom is the upflow type anaerobic biological filter, and intermediate transition zone is made up of three-phase separating device and aerating apparatus.
The inoganic solids biological active filling material is used in described upflow type anaerobic biological filter.Biological film formed Sludge Bed for coming off on the filler between filler and the reactor bottom, the height of Sludge Bed can be adjusted by regulating the packing area height.
Use the floating stuffing of proportion in the MBBR of top as 0.93-0.99; Specific surface area is generally and is 400m
2/ m
3～600m
2/ m
3, specific surface area is the bigger the better.Floating stuffing is common name herein, and material has a variety of, all is inorganic macromolecule material, as polyethylene, and polypropylene etc., structure also has a variety of, and commercialization at present also can be described as " high-performance inorganic bio-carrier ".The filling ratio of filler is 40%-60% (volume in aerobic moving bed biofilm reactor).Aeration rate need guarantee that dissolved oxygen content is 2mg/L-4mg/L.
Reactor intermediate transition zone three-phase separating device top is an aerating apparatus, and three-phase separating device is made up of swash plate and rhombus baffle plate, and aerating apparatus adopts perforated pipe, leaves the space between the perforated pipe.
The aerobic zone of reactor (aerobic moving bed biofilm reactor), anaerobic zone (upflow type anaerobic biological filter) and zone of transition height can suitably be adjusted according to the influent quality water yield and processing requirements, usually the aerobic zone height accounts for whole reactor height 1/2nd, the anaerobic zone height accounts for whole reactor height 2/5ths, and the zone of transition height accounts for whole reactor height 1/10th.
Biological film formed Sludge Bed for coming off on the filler between anaerobic zone filler and the reactor bottom, the height of Sludge Bed can be adjusted by regulating the anaerobic zone height, accounts for whole reactor height 1/20th usually.
The method of integrated up-flow reactor advanced treatment wastewater from fermentation industry the steps include:
(1) waste water enters the upflow type anaerobic biological filter by integrated up-flow reactor bottom water-distributing device, by the Sludge Bed of reactor bottom, can carry out preliminary hydrolysis, acidifying and hold back suspended particulate hardly degraded organic substance in the waste water earlier; During then by packing layer, under the effect of a large amount of anaerobions that adhere on the filler, hardly degraded organic substance further is degraded to the organism that is easy to aerobic biodegradation, the while microbial film obtains nutrition from degradation process and energy carries out growth and breeding, the aged microbial film comes off under the washing away of ascending current, the Sludge Bed that the bottom is gone in most of sedimentation, small portion is carried rising by current.Upflow type anaerobic biological filter hydraulic detention time is 1～2h.
(2) current enter zone of transition, aging come off the back with current rise the anaerobe film stopped by swash plate and rhombus baffle plate and can't enter MBBR, be suspended in the swash plate below, the aerobic biologic membrane that comes off on the filler in MBBR forms the facultative oxygen-starved area of dynamic stability, organism can continue in the oxygen-starved area by biological degradation, and the gas that produces in the anaerobic biodegradation process enters the air chamber of swash plate both sides simultaneously.
(3) current continue to rise, enter MBBR, during through aerating apparatus, mix with gas is fierce, enter the packing area together, under the impact of ascending current and gas, filler is complete fluidized state, the solid, liquid, gas three-phase fully contacts, and has good mass-transfer efficiency, and the microbial film of filling surface is fully degraded to the organism in the water, obtain nutrition and energy simultaneously and carry out growth and breeding, the aged microbial film comes off under the washing away of current and gas, and major part is settled down to the Sludge Bed of reactor bottom, and small portion rests on the oxygen-starved area; The microbial film outside surface that forms at filling surface has very high good oxygen activity, and therefore the microbial film bottom has the ability of good processing efficiency and denitrogenation dephosphorizing near the anaerobic activity to waste water.The MBBR hydraulic detention time is 1～2h.
(4) waste water after the processing flows out from reactor head, and the water part is back to reactor inlet, and reflux ratio is 100%-200%, all the other dischargings.
Present method process object adds water outlet after the aerobic secondary biochemical treatment for the wastewater from fermentation industry anaerobism, and its water quality characteristics is high salinity (greater than 5000mg/L), colourity higher (extension rate method 100-150 doubly), COD lower (less than 400mg/L), BOD/COD value low (less than 0.25).
3. beneficial effect
The invention provides the method for integrated up-flow reactor and advanced treatment wastewater from fermentation industry, except the high treatment efficiency of each process section itself, the incorporate structure of reactor also makes the biophase between each process section that mutual infiltration and exchange are arranged.In the integrated up-flow reactor, the microbial film of aerobic zone is precipitated into zone of transition and anaerobic zone; The microbial film that the proportion that anaerobic zone comes off is little rises with current, forms an oxygen-starved area of containing the dynamic stability of anaerobe and aerobe simultaneously with the sedimentary part biological film of aerobic zone in zone of transition after being dammed by zone of transition.Whole reactor has different biological aspects at various height, and microbe species is compared more horn of plenty with other traditional biological treatment process with other integrated up-flow reactor.The present invention is suitable for handling high salinity, than high chroma, based on solvability hardly degraded organic substance, wastewater from fermentation industry secondary biochemical treatment water outlet that the water quality and quantity fluctuation is big, have higher biology domestication potentiality, domestication through the short period just can adapt to the high salinity in the waste water.In addition, incorporate structure makes reactor compact more, is convenient to use; The whole reactor sludge yield is very low, and mud is long age, and secondary pollution is little; AF technology and MBBR technology that reactor adopts all can adapt to the impact variation of load, and restart rapidly, can adapt to wastewater from fermentation industry changes the water quality and quantity that causes because of its production cycle fluctuation.
Description of drawings
Fig. 1 is a structural representation of the present invention, 1-water-distributing device wherein, 2-upflow type anaerobic biological filter, the 3-Sludge Bed, 4-mud row mouth, 5-packing layer, the 6-zone of transition, 7-rhombus baffle plate, 8-swash plate, 9-collection chamber, the 10-boring aeration pipe, the 11-MBBR, 12-floating stuffing, 13-water outlet.
Embodiment
Further specify the present invention below in conjunction with accompanying drawing
Embodiment 1
Integrated up-flow reactor, waste water is entered the upflow type anaerobic biological filter 2 of reactor by bottom water-distributing device 1, present stream mode, earlier by Sludge Bed 3, biological sludge carries out preliminary hydrolysis, acidifying and the suspended particulate matter that dams to hardly degraded organic substance in the waste water, the upper reaches is by packing layer 5 then, and under the effect of a large amount of anaerobions that adhere on the filler, hardly degraded organic substance further is degraded to the organism that is easy to aerobic biodegradation; When current rise by zone of transition 6 then, the anaerobe mud that rises with current is stopped the MBBR 11 that can't enter top by rhombus baffle plate 7 and swash plate 8, major part is settled down to the Sludge Bed 2 of reactor bottom, small portion is suspended in swash plate 8 belows, the part biological film that comes off on the floating stuffing 12 in MBBR 11 forms the facultative oxygen-starved area of dynamic stability, and the gas that produces in the anaerobic process enters the collection chamber 9 of swash plate both sides simultaneously; When current continue to rise by boring aeration pipe 10, mix with gas is fierce, enter MBBR 11 then together, gas, water fully contact with floating stuffing 12, the microbial film that is enriched in filling surface is fully degraded to the organism in the water, the aged microbial film comes off under the washing away of current and gas, and part is settled down to Sludge Bed 3, and part is suspended in swash plate 8 belows; Last water outlet is flowed out from reactor head water outlet 13, and reflux ratio is 100%～200%.Discharge by mud row mouth 4 when Sludge Bed 3 excess sludges are too much.Upflow type anaerobic biological filter and MBBR hydraulic detention time are 1～2h.
Floating stuffing proportion is 0.93-0.99; Floating stuffing is an inorganic macromolecule material, and as polyethylene, polypropylene all can.Aeration rate need guarantee that dissolved oxygen content is 2mg/L-4mg/L.
When reactor starts for the first time, floating stuffing in the MBBR must carry out the biofilm operation, after treating that filling surface is attached with one deck microbial film, remaining mud is discharged reactor or is precipitated into the digestion that is hydrolyzed of Sludge Bed in the upflow type anaerobic biological filter; The upflow type anaerobic biological filter need be inoculated a certain amount of anaerobic sludge and start required biomass requirement to satisfy.When restarting afterwards, only need to use the waste water acclimated microorganism can enter normal operating condition after for some time, need not inoculation and biofilm operation that repetition starts for the first time.
Handle certain vitamins C pharmaceutical factory anaerobism with this integrated up-flow reactor and add the aerobic biochemical treat effluent, treatment capacity is 1000t/d, and its water quality condition specifically sees Table 1:
Certain vitamins C pharmaceutical factory anaerobism of table 1 adds the aerobic biochemical treat effluent
| ??COD Cr(mg/L) | ??BOD(mg/L) | Colourity (extension rate) | Salinity (mg/L) | ??pH |
| ??380 | ??75 | ??110 | ??5600 | ??7.2 |
Each parameter of integrated up-flow reactor is as follows: the whole reactor cross section is a square, and the length of side is 1.2m, and the MBBR height is 2.4m, and upflow type anaerobic biological filter height is 1.4m, and the zone of transition height is 0.48m, and cubic capacity is 148.4m
3, total hrt is 3.56h.The used filler in upflow type anaerobic biological filter is a biological rope, fills up substantially; The used floating stuffing proportion of MBBR is 0.96, and packing ratio is 40%.
Whole reactor is finished from starting to the domestication cultivation, needs 50～60 days altogether.The operation phase reflux ratio is 100%, and aeration rate guarantees that dissolved oxygen content is 2.8-3.2mg/L, and effluent color dilution is obviously removed, and the effluent quality situation specifically sees Table 2:
Table 2 integrated up-flow reactor effluent quality
| ??COD Cr(mg/L) | ??BOD(mg/L) | Colourity (extension rate) | ??pH |
| ??90 | ??- | ??30 | ??7.4 |
Simultaneously, also this integrated up-flow reactor has been carried out restarting experiment, the result shows, from restarting to stable, only needs 15～20 days.
Embodiment 2
Handle another vitamins C pharmaceutical factory of family anaerobism with structure with the integrated up-flow reactor of embodiment 1 and add the aerobic biochemical treat effluent, treatment capacity is 3000t/d, and its water quality condition specifically sees Table 3:
Certain vitamins C pharmaceutical factory anaerobism of table 3 adds the aerobic biochemical treat effluent
| ??COD Cr(mg/L) | ??BOD(mg/L) | Colourity (extension rate) | Salinity (mg/L) | ??pH |
| ??400 | ??80 | ??130 | ??6000 | ??7.1 |
Each parameter of integrated up-flow reactor is as follows: the whole reactor cross section is a square, and the length of side is 5m, and the MBBR height is 10m, and upflow type anaerobic biological filter height is 6m, and the zone of transition height is 2m, and cubic capacity is 450m
3, total hrt is 3.6h.The used filler in upflow type anaerobic biological filter is a biological rope, fills up substantially; The used floating stuffing proportion of MBBR is 0.94, and packing ratio is 45%.
Whole reactor is finished from starting to the domestication cultivation, needs 60～70 days altogether.The operation phase reflux ratio is 100%, and aeration rate guarantees that dissolved oxygen content is 3.0-4.0mg/L, and effluent color dilution is obviously removed, and the effluent quality situation is specifically as table 4:
Table 4 integrated up-flow reactor effluent quality
| ??COD Cr(mg/L) | ??BOD(mg/L) | Colourity (extension rate) | ??pH |
| ??95 | ??- | ??30 | ??7.2 |
Simultaneously, also this integrated up-flow reactor has been carried out restarting experiment, the result shows, from restarting to stable, only needs 15～20 days.
Embodiment 3
Add the aerobic biochemical treat effluent with structure with the integrated up-flow reactor treatment of Citric Acid Industrial Wastewater anaerobism of embodiment 1, treatment capacity is 1500t/d, and its water quality condition specifically sees Table 5:
Certain Citric Acid Plant factory effluent anaerobism of table 5 adds aerobic biochemical treat effluent water quality
| ??COD Cr(mg/L) | ??BOD(mg/L) | Colourity (extension rate) | Salinity (mg/L) | ??pH |
| ??400 | ??90 | ??130 | ??4900 | ??7.1 |
Each parameter of integrated up-flow reactor is as follows: the whole reactor cross section is a square, and the length of side is 2.5m, and the MBBR height is 5m, and upflow type anaerobic biological filter height is 3m, and the zone of transition height is 1m, and cubic capacity is 225m
3, total hrt is 3.6h.The used filler in upflow type anaerobic biological filter is a biological rope, fills up substantially; The used floating stuffing proportion of MBBR is 0.93, and packing ratio is 60%.
Whole reactor is finished from starting to the domestication cultivation, needs 40～50 days altogether.The operation phase reflux ratio is 100%, and aeration rate guarantees that dissolved oxygen content is 3.0-4.0mg/L, and effluent color dilution is obviously removed, and the effluent quality situation is specific as follows:
Table 6 integrated up-flow reactor effluent quality
| ??COD Cr(mg/L) | ??BOD(mg/L) | Colourity (extension rate) | ??pH |
| ??80 | ??- | ??25 | ??7.2 |
Simultaneously, also this integrated up-flow reactor has been carried out restarting experiment, the result shows, from restarting to stable, only needs 15～20 days.
Result of implementation shows, integrated up-flow reactor of the present invention is used for the advanced treatment of wastewater from fermentation industry, have start fast, the residence time is short, stable, effluent quality is good, decolorizing effect is obvious, restart advantages such as quick and convenient, can realize the removal of COD and chrominance synchronization, effluent quality can reach the index request of new standard fully.The advanced treatment that the present invention is directed to wastewater from fermentation industry is not limited to above embodiment.
Claims (7)
1. integrated up-flow reactor is characterized in that this reactor is made up of upper, middle, and lower part, and top is MBBR, and the bottom is the upflow type anaerobic biological filter, and intermediate transition zone is made up of three-phase separating device and aerating apparatus.
2. integrated up-flow reactor according to claim 1 is characterized in that upflow type anaerobic biological filter use inoganic solids biological active filling material.
3. integrated up-flow reactor according to claim 2 is characterized in that the biological film formed Sludge Bed for coming off on the filler between filler and the reactor bottom, and the height of Sludge Bed can be adjusted by regulating the packing area height.
4. integrated up-flow reactor according to claim 3 is characterized in that using the floating stuffing of proportion as 0.93-0.99 in the aerobic moving bed biofilm reactor of top, and filling ratio is 40%-60%.
5. according to each described integrated up-flow reactor in the claim 1～4, it is characterized in that reactor intermediate transition zone three-phase separating device top is aerating apparatus, three-phase separating device is made up of swash plate and rhombus baffle plate, and aerating apparatus adopts perforated pipe, leaves the space between the perforated pipe.
6. the method for integrated up-flow reactor advanced treatment wastewater from fermentation industry the steps include:
(1) waste water enters the upflow type anaerobic biological filter by integrated reactor bottom water-distributing device, and by the Sludge Bed of reactor bottom, by packing layer, upflow type anaerobic biological filter hydraulic detention time is 1～2h then earlier;
(2) current enter zone of transition, aging come off the back with current rise the anaerobe film stopped by swash plate and rhombus baffle plate and can't enter MBBR, be suspended in the swash plate below, the aerobic biologic membrane that comes off on the filler in MBBR forms the facultative oxygen-starved area of dynamic stability;
(3) current continue to rise, and enter MBBR, during through aerating apparatus, mix with gas is fierce, enter the packing area together, under the impact of ascending current and gas, filler is complete fluidized state, and the MBBR hydraulic detention time is 1～2h;
(4) waste water after the processing flows out from reactor head, and the water part is back to reactor inlet, and reflux ratio is 100%-200%, all the other dischargings.
7. the method for integrated up-flow reactor advanced treatment wastewater from fermentation industry according to claim 6, it is characterized in that process object adds water outlet after the aerobic secondary biochemical treatment for the wastewater from fermentation industry anaerobism, its water quality characteristics be high salinity, colourity be extension rate method 100-150 doubly, COD less than 400mg/L and BOD/COD value less than 0.25.
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