CN101985381A - Integrated treating device and method of fuel ethanol distillation wastewater of corn straw and high ammonia nitrogen pretreatment wastewater - Google Patents
Integrated treating device and method of fuel ethanol distillation wastewater of corn straw and high ammonia nitrogen pretreatment wastewater Download PDFInfo
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Abstract
The invention relates to an integrated treating device and method of the fuel ethanol distillation wastewater of corn straw and the high ammonia nitrogen pretreatment wastewater. In the device of the invention, the anaerobic fluidized bed reactor is provided with a cylindrical outer shell, a cylindrical guide cylinder and a three-phase separator are arranged in the anaerobic fluidized bed reactor; the airlift circulation flow reactor is provided with a cylindrical outer shell, a cylindrical guide cylinder is arranged in the outer shell, the top of the reactor is provided with a solid-liquid separation area; and the aeration biological filter bed is provided with a cylindrical outer shell, a cylindrical guide cylinder is arranged in the filter bed, and a backwashing pump is arranged outside the filter bed. The integrated treating method comprises the following steps: the high-temperature anaerobic primary treatment of distillation wastewater is performed in the anaerobic fluidized bed reactor, the anaerobic effluent and the high ammonia nitrogen pretreatment wastewater are commonly degraded in the airlift circulation flow reactor, and finally the advanced treatment of the aerobic effluent is performed in the aeration biological filter bed. The integrated system has simple and compact structure and good removal effect of high concentration COD and ammonia nitrogen; and after the distillation wastewater and the pretreatment wastewater are treated by the integrated system, the major indexes of the treated wastewater can satisfy the grade A wastewater discharge standard of the national alcohol industry.
Description
Technical field
The present invention relates to a kind of maize straw alcohol fuel distillation waste water and high ammonia nitrogen pretreated waste water integrated treating device and method, belong to alcohol industry biological wastewater treatment technology field.
Background technology
The alcohol fuel that adopts biomass to produce is a kind of important renewable energy, is oil-fired a kind of important substitute energy form.Alcohol fuel can slow down problems such as the human energy dilemma that faces at present, environmental degradation as a kind of clean energy.
Most of alcohol fuel adopts grain raw material fermentative production such as corn, wheat and cereal in China, and raw material sources and cost problem have limited its large-scale production and application.Agricultural waste material (stalk) is a kind of wide material sources, cheap biomass fuel alcohol production raw material, is the desirable feedstock of producing alcohol fuel.Wherein, maize straw is the abundant ideal cellulosic materials fuel ethanol production raw material in the northern area of China source, and maize straw alcohol fuel technology is greatly developed in recent years.
In the maize straw fuel ethanol production technology, must carry out pre-treatment to raw material and destroy the higher structure of lignocellulose to enhance productivity.Wherein, the ammoniacal liquor infusion method is a kind of very effective pretreatment process at maize straw, corn cob, and maize straw is soaked in ammoniacal liquor under certain condition, can effectively remove xylogen composition wherein, can effectively improve downstream alcohol production efficient.But used a large amount of ammoniacal liquor in this technology, can produce a large amount of higher pretreated waste water of ammonia nitrogen concentration, needed before the discharging to remove ammonia nitrogen and organism in order to avoid water surrounding is polluted through purifying treatment in the production of fuel ethanol stage.Simultaneously, maize straw carries out enzymic hydrolysis and fermentation again after pre-treatment, the remaining a large amount of organic distillation waste water of high density of meeting behind the fermented liquid distillation ethanol, contain a large amount of relatively poor organism of biochemical such as Mierocrystalline cellulose, hemicellulose and five-carbon sugar that do not utilize in the distillation waste water, and contain the material that nitrogen and phosphorus etc. can cause body eutrophication, directly discharging not in addition processing and utilizing can cause the water pollution and the wasting of resources.
At present for the biologic treating technique spininess of alcohol wastewater for starch materials such as traditional wheat, corn, cereal, treatment process is generally the anaerobic-aerobic biological treatment, anaerobic technique adopts high speed reactors such as UASB more, this type of reactor is had relatively high expectations to the water inlet suspension content, suspension content height in the maize straw alcohol fuel distillation waste water, and contain the material of biodegradability differences such as more Mierocrystalline cellulose, hemicellulose, xylogen and five-carbon sugar, conventional needle is relatively poor to its degradation effect to the method for starch-based initial material; Aerobic stage adopts technologies such as SBR, oxidation pond and oxidation ditch more, and this type of technology is relatively poor to the high ammonia-nitrogen wastewater removal effect.Anaerobic stages adopts the anaerobic fluidized bed reactor of high mass transfer and high sludge concentration in the integrating device, adds carrier and keep the high reactivity sludge concentration in reactor, strengthens the removal effect of organic matter to the biodegradability difference; Aerobic stage adopts the high Airlift circulating reactor of ammonia nitrogen removal efficient, comes ammonia nitrogen in the efficient degradation waste water by adding carrier and strengthening the three-phase mass transfer; The aeration biological filter bed assurance effluent quality of final employing.
Summary of the invention
The object of the present invention is to provide a kind of at stalk fuel ethanol high density distillation waste water and the efficient degradation of high ammonia nitrogen pretreated waste water and the integrated treating device and the method for ammonia nitrogen removal.These apparatus and method can efficiently be removed organic pollutant and the ammonia nitrogen in the fuel ethanol wastewater.Among the present invention, anaerobic stages adopts the high temperature anaerobic fluidized-bed, guide shell is set strengthens mass transfer, adds absorbent charcoal carrier and keeps high sludge concentration, and COD removes the efficient height; Aerobic stage adopts efficient gas lift type common loop reactor, gas-liquid-solid three-phase mass-transfer efficiency height, add absorbent charcoal carrier and keep the high reactivity sludge concentration, in aerobic reactor, handle anaerobism water outlet and high ammonia nitrogen pretreated waste water simultaneously, can improve the ammonia nitrogen removal frank in the pretreated waste water greatly; The tertiary treatment stage adopts aeration biological filter bed, adds the growth of active carbon with high specific surface area attached biological film, can adsorb simultaneously and the biological degradation outputted aerobic water in the pollutent and the colourity of difficult degradation, obtain the high quality water outlet.The effluent quality leading indicator reaches national alcohol industry waste water first discharge standard.The maize straw fuel ethanol wastewater is directly intake through the simple filtration pre-treatment, keep the high reactivity sludge concentration by adding high specific surface carrier in the anaerobic-aerobic stage reactors, guide shell is set strengthens mass transfer, tertiary treatment bacteria bed control effluent characteristics, integrated system is to influent quality tolerance height, anti-shock loading height, long-time running is stable, effluent quality is good, and gas production rate is big, so processing maize straw alcohol fuel processing wastewater has very big actual application value in the integrated system.
The present invention is realized by following technical proposals:
The treatment unit of a kind of maize straw alcohol fuel high density distillation waste water and high ammonia nitrogen pretreated waste water, device is positioned at the follow-up wastewater treatment stage of fuel ethanol production technology, and water inlet is respectively from the high ammonia nitrogen pretreated waste water of stalk pretreatment stage and the distillation waste water of ethanol distillation technology; Become reconciled at anaerobic fluidized bed bio-reactor 2 and to be provided with anaerobism water outlet and pretreated waste water tempering tank 8 between the oxygen lift-type circulation bioreactor 9; Be provided with fluidized-bed reactor guide shell 3 and triphase separator 5 in the anaerobic fluidized bed bio-reactor, the axis of anaerobic fluidized bed bio-reactor 2 body skiies and fluidized-bed reactor guide shell 3 is overlapping, and the top is provided with triphase separator 5; Be provided with loop reactor guide shell 10 in the aerobic airlift loop bioreactor 9, the axis of aerobic airlift loop bioreactor body skin and loop reactor guide shell is overlapping, aerobic airlift loop bioreactor top is provided with negative area 12, and the negative area connects the settling vessel 19 of peripheral hardware by the road; Be provided with filter bed guide shell 22, water distributor 24 and gas distributor 25 in aeration biological filter bed 21, the axis of bio-filter bed reactor body skin and filter bed guide shell is overlapping, filter bed guide shell 22 tops are provided with water distributor 24, the bio-filter bed reactor bottom is provided with gas distributor 25, peripheral hardware backwashing pump 26.
In treatment unit, anaerobic fluidized bed bio-reactor 2 is provided with cylindrical shell body, aspect ratio 9: 1-11: 1, in establish cylindrical guide shell, diameter is the 65-75% of body skin, the guide shell height is the 80-85% of body skin; Described aerobic airlift loop bioreactor 9 is provided with cylindrical shell body, and the body skin cross section is circular, aspect ratio 10: 1, in establish cylindrical guide shell, draft tube diameter is the 65-70% of body skin, the guide shell height is the 85-90% of body skin; Described aeration biological filter bed 21 are provided with cylindrical shell body, and the body skin cross section is circular, and aspect ratio is 3: 1, in establish cylindrical guide shell, draft tube diameter is the 50-65% of body skin, the guide shell height is the 90-95% of body skin.
The treatment process of a kind of maize straw alcohol fuel high density distillation waste water and high ammonia nitrogen pretreated waste water, step is as follows: 1) anaerobic fluidized bed bio-reactor is by the water-in seed sludge, inoculum is a common sewage work anaerobic sludge, inoculum size is the 25-50% of reactor volume, add the activated carbon particle carrier that the particle diameter that accounts for reactor volume 5-10% is 0.8-1.3mm simultaneously, add tap water dilution alcohol fuel distillation waste water, COD is about 5000mg/L, 53-55 ℃ of controlling reactor temperature, flow rate 8.0-11.3m/h on the liquid, intermittently tamed 5-8 days, water inlet continuously then, when being higher than 75%, water outlet COD clearance improves reactor organic loading 30-50%, extremely former water is directly intake, advanced continuously former water 10-20 days, be stabilized in 80-90% to the COD clearance, active sludge adheres to the formation microbial film in the reactor on carrier, active sludge adheres to the formation microbial film in the reactor on carrier, finish the startup anaerobic reactor, can carry out maize straw alcohol fuel distillation anaerobic waste water one-level and handle;
2) start the anaerobic fluidized bed bio-reactor of finishing with step 1 method, maize straw alcohol fuel high density distillation waste water, pH 4.1-4.7, COD 15000-35000mg/L, suspension content SS 3760-9015mg/L; 53-55 ℃ of anaerobic reactor operating temperature, intake pump is regulated hydraulic detention time 30-55h, and reflux pump is regulated the water outlet reflux rate, make in the reactor that flow rate reaches 8.0-11.3m/h on the liquid, water outlet is spilled over to settling vessel, and through natural subsidence, supernatant liquor is intake as Airlift circulating reactor;
3) airlift loop bioreactor inoculation municipal sewage plant aerobic sludge, inoculum size is the 20-40% of reactor volume, adding particle diameter is the activated carbon particle carrier of 0.8mm-1.3mm, dosage is the 3-5% of reactor volume, pretreated waste water COD is 652-910mg/L, ammonia nitrogen is 450-598mg/L, the anaerobism water outlet is through natural subsidence, supernatant liquor and high ammonia nitrogen pretreated waste water, with volume ratio 1: 4-1: 6 mixings, be diluted to the 20%-50% of original content with tap water, inject aerobic airlift loop bioreactor, regulate charge flow rate, the beginning aeration, intermittently domestication, every 24h or COD and ammonia nitrogen removal frank are greater than changing water at 75% o'clock, intermittently tamed 3-5 days, water inlet continuously then, water inlet COD and ammonia nitrogen removal frank were greater than 75% o'clock raising influent concentration 20-50%, directly intake to the anaerobism water outlet, water inlet is 10-15 days continuously, reactor obtains the aerobic activated sludge that high reactivity is rich in the nitration denitrification bacterium, aerobic water inlet COD clearance is higher than 85%, ammonia nitrogen removal frank is higher than 90%, and active sludge forms microbial film attached on the carrier, finish the aerobic airlift loop bioreactor of startup, can carry out the aerobic treatment of distillation anaerobic waste water water outlet of maize straw alcohol fuel and pretreated waste water;
4) start the aerobic airlift loop bioreactor of finishing with the step 3) method, pretreated waste water COD is 652-910mg/L, ammonia nitrogen is 450-598mg/L, the anaerobism water outlet is through natural subsidence, and supernatant liquor and high ammonia nitrogen pretreated waste water are with volume ratio 1: 4-1: 6 mixings, inject aerobic airlift loop bioreactor, temperature of reactor is controlled at 33-35 ℃, hydraulic detention time 6-15h, and gas void tower rate-controlling is at 8-13mm/s;
5) aeration biological filter bed filling accounts for the cylindric absorbent charcoal carrier of height for reactor 70-80% thickness, particle diameter 1-2mm, 10-15% is from the unnecessary mud of discharging in the aerobic Airlift circulating reactor settling vessel in inoculation, be full of outputted aerobic water, intermittent aeration 3-5 days, outputted aerobic water was intake continuously then, and reactor is 18-25 ℃ of operation down, hydraulic detention time 4-8h, vapour-liquid ratio remains on 5: 1-7: 1.
The invention has the advantages that: the present invention adopts the anaerobism and the aerobic sludge of domestication, attached to forming microbial film on the activity carbon carrier.Anaerobic reactor is in high temperature (53-55 ℃) operation down, improved the degradation rate of the relatively poor material of organic pollutant and biodegradability, reach fluidized state by flow rate on the liquid in the control anaerobism water outlet cycle control reactor, by carrier fixedly thalline form microbial film and prevent that active sludge from washing out loss, sludge concentration height in the reaction period increases guide shell, mass transfer effect is good, simple in structure, be difficult for blocking, can handle high suspended matter waste water; Aerobic stage adopts aerobic airlift loop bioreactor, and the reactor aspect ratio is bigger, bottom inflow, and the gas-liquid-solid three-phase uniform mixing has been strengthened the oxygen transfer process, and is high to the ammonia nitrogen removal effect; The active carbon with high specific surface area carrier of the easy apposition growth of aeration biological filter bed interpolation thalline adsorbs and biological degradation simultaneously, can effectively remove hardly degraded organic substance and colourity in the waste water; A whole set of coupling device is compared with traditional technology, compact construction, the processing efficiency height, turndown ratio is big, handle anaerobism water outlet and pretreated waste water in the biological degradation simultaneously of aerobic airlift loop bioreactor, can improve pretreated waste water C/N ratio, alleviate the impact of anaerobism effluent index fluctuation simultaneously, the enhanced system shock resistance aerobic reactor.The present invention handles by high temperature anaerobic fluidized bed bio reactor one-level, the biological second-stage treatment of circulation and aeration biological filter bed (microbial film) tertiary treatment method in the aerobic air lift type, high density maize straw alcohol fuel distillation waste water and high ammonia nitrogen pretreated waste water are handled in biopurification simultaneously, water inlet COD is reduced to less than 100mg/L by 1500-35000mg/L, ammonia-nitrogen content is reduced to less than 15mg/L by 450-598mg/L, water outlet pH 7.0-8.0, the water outlet leading indicator reaches national alcohol industry waste water first discharge standard, but the operation of device long-time continuous stable, the present invention has bigger promotional value.
The biological second-stage treatment of circulation and aeration biological filter bed (microbial film) tertiary treatment device in the processing of high temperature anaerobic fluidized bed bio reactor one-level, the aerobic air lift type, biological degradation high density maize straw alcohol fuel distillation waste water and high ammonia nitrogen pretreated waste water, remove waste water COD by high temperature anaerobic high speed reactor, handle anaerobism water outlet and pretreated waste water simultaneously by aerobic Airlift circulating reactor, reach high ammonia nitrogen removal efficient; The integrating device mass transfer is good, energy consumption is low, turndown ratio is big, COD and ammonia nitrogen removal efficient height, obtain methane as clean energy source simultaneously.
Description of drawings
Fig. 1: integrated treating device synoptic diagram.
Description of drawings: 1-distillation influent waste water pump, 2-anaerobic fluidized bed reactor, 3-fluidized-bed reactor guide shell, 4-fluidized-bed temperature controller, 5-triphase separator, 6-recycle pump, 7-anaerobism settling vessel, the 8-tempering tank, 9-Airlift circulating reactor, 10-loop reactor guide shell, the aerobic intake pump of 11-, the 12-negative area, 13-loop reactor temperature regulator, 14-pH controller, 15-pretreated waste water intake pump, the 16-air compressor, 17-loop reactor air flowmeter, 18-filter bed air flowmeter, the aerobic settling vessel of 19-, 20-filter bed intake pump, 21-is aeration biological filter bed, 22-filter bed guide shell, the 23-packing layer, the 24-water distributor, 25-gas distributor, 26-backwashing pump.
Embodiment
The invention will be further described below in conjunction with the accompanying drawing specific embodiment.
Adopt as Fig. 1 device mode of connection: maize straw alcohol fuel distillation waste water enters anaerobic fluidized bed bio-reactor 2 by intake pump 1 dominant discharge, by flooding velocity control hydraulic detention time, reactor is by temperature regulator 4 controlled temperature, the anaerobism water outlet is injected anaerobic fluidized bed bio-reactor 2 bottoms through reflux pump 6 circulations, keep the liquid fluidized state in the reactor, the anaerobism water outlet is through settling vessel 7 natural subsidence, settled mud is regularly discharged, (intake pump 13 enters tempering tank 8 and mixes for supernatant liquor and high ammonia-nitrogen wastewater, inject aerobic airlift loop bioreactor 9 through aerobic intake pump 11 dominant discharge again, aerobic reactor is by temperature regulator 13 controlled temperature, keep the appropriate pH scope by pH controller 14, the pressurized air that air compressor 16 produces is regulated flow by gas meter 17 and is blasted aerobic airlift loop bioreactor 9 bottoms, keep certain superficial gas velocity in the reactor, outputted aerobic water is through settling vessel 19 natural subsidence, regularly discharge unnecessary mud, supernatant liquor enters aeration biological filter bed 21 by filter bed intake pump 20 through water distributor 24, the pressurized air that air compressor 16 produces is regulated flow by gas meter 18, enter the filter bed bottom by gas distributor 25, water outlet regularly is used for the bacteria bed back flushing after collecting, back flushing is carried out when bed body pressure head reaches certain value by backwashing pump 26 control flooding velocity and under meter 18 control charge flow rates.
With anaerobic fluidized bed bio-reactor, be provided with cylindrical shell body, aspect ratio 9: 1-11: 1, in establish cylindrical guide shell, draft tube diameter is the 65-75% of body skin, and the guide shell height is the 80-85% of body skin, and the axis of body skin and guide shell is overlapping, the reactor sealing, the top is provided with triphase separator; Described aerobic airlift loop bioreactor is provided with cylindrical shell body, the body skin cross section is circular, aspect ratio 10: 1, in establish cylindrical guide shell, draft tube diameter is the 65-70% of body skin, and the guide shell height is the 85-90% of body skin, and the axis of body skin and guide shell is overlapping, solid-liquid displacement zone is established at the top, connects the sludge settling device of peripheral hardware by the road; The described aeration biological filter bed cylindrical shell body that is provided with, the body skin cross section is circular, aspect ratio is 3: 1, in establish cylindrical guide shell, draft tube diameter is the 50-65% of body skin, the guide shell height is the 90-95% of body skin, the axis of body skin and guide shell is overlapping, the guide shell top is provided with water distributor, and reactor bottom is provided with gas distributor, the peripheral hardware backwashing pump.
Maize straw alcohol fuel distillation waste water and pretreated waste water integrated treating device working method step are as follows:
1) cultivation of high temperature methanogen and carrier immobilized microbial film in the anaerobic sludge: circulation bioreactor in the anaerobism, inoculation 30-50% alcohol waste water treatment plant high temperature anaerobic active sludge, adding tap water, to be diluted to COD be alcohol fuel distillation waste water about 5000mg/L, add the particle diameter 0.8-1.3mm activated carbon particle that accounts for reactor volume 5-10%, flow rate 8.0-11.3m/h on the controlled liq, add Fe, Co, the trace element that additional microorganism growth such as Ni is required, hydraulic detention time 30-55h, when being higher than 75%, water outlet COD clearance improves organic loading 30-50%, extremely former water is directly intake, advanced continuously former water 10-20 days, be stabilized in 80-90% to the COD clearance, active sludge adheres to the formation microbial film in the reactor on carrier, aerogenesis is abundant, to waste water degraded vigor height, the cultivation and the immobilization of high temperature active mud are finished.
2) the anaerobism water outlet advances to enter aerobic airlift loop bioreactor with pretreated waste water with the certain proportion mixing and carry out aerobic treatment through tempering tank: domestication of aerobe processing initial stage and enrichment nitrifier, the nitrosification flora, adopt intermittent water inflow, water inlet is anaerobism water outlet and pretreated waste water mixed solution after diluting, the aerobic sludge inoculum size is the 20-40% of reactor volume, add the particle diameter 0.8-1.3mm activated carbon particle that accounts for reactor volume 3-5%, mix the 20-50% that water inlet is diluted to original content, temperature of reactor 33-35 ℃, reactor empty tower gas velocity 8-13mm/s, after 24 hours or COD and ammonia nitrogen removal frank be higher than at 75% o'clock and stop ventilation, leave standstill 30min, mixing water outlet displacement supernatant liquor with dilution, intermittently tame water inlet continuously after 3 days, conditioned reaction device pH value 7.0-7.5, hydraulic detention time 6-15h, be higher than 75% to water outlet COD and ammonia nitrogen removal frank and improve influent concentration 20-50% to former water water inlet, advanced continuously former water 10-15 days, adhere to the brown microbial film to carrier surface, water outlet COD clearance is higher than 85%, ammonia nitrogen removal frank is higher than 90%, finishes activated sludge acclimatization enrichment and microbial film immobilization; Can directly enter aerobic reactor behind anaerobism water outlet and the pretreated waste water mixing after startup is finished, aerobic settling vessel supernatant liquor is as aeration biological filter bed water inlet.
3) aeration biological filter bed processing outputted aerobic water: the active sludge of the Airlift circulating reactor of reactor inoculation 10-15%, be full of outputted aerobic water, intermittent aeration 24h, the displacement supernatant liquor, water inlet continuously after 3 days, HRT is controlled at 4-8h, normal-temperature operation (18-25 ℃), vapour-liquid ratio remains on 5: 1-7: 1, and overflow water outlet, water outlet are regularly as the bacteria bed backwash water.
4) biogas that anaerobic stages produces can be used as the power consumption of thermal source compensating operation.
5) final outflow water COD≤100mg/L, ammonia nitrogen≤15mg/L, leading indicator reaches national alcohol industry waste water first discharge standard.
Exemplary embodiments 1
System starts: 50% anaerobic activated sludge is inserted anaerobic fluidized bed reactor, add the activity carbon carrier of the particle diameter 0.8-1.3mm of reactor volume 10%, anaerobic reactor effective volume 4L, body skin diameter 80mm, height 880mm, draft tube diameter 55mm, height 750mm, keep 53-55 ℃ of temperature of reactor, dilution 3-5 alcohol fuel distillation waste water is doubly intermittently tamed water inlet continuously after 5 days, hydraulic detention time 50-55h, flow rate 9.0m/h on the liquid, water outlet COD clearance is higher than 75% and improves influent concentration, and gradient domestication enrichment active sludge was through gradient domestication in 25 days, former water is directly intake, operation is 11 days continuously, and the microbial film film immobilization is finished, and anaerobic reactor starts to be finished; Aerobic airlift loop bioreactor is inoculated 40% normal-temperature aerobic active sludge, aerobic airlift loop bioreactor effective volume 7.6L, body skin diameter 100mm, height 1000mm, draft tube diameter 65mm, height 850mm, keep 33-35 ℃ of temperature of reactor, empty tower gas velocity 10.0mm/s, anaerobism water outlet and pretreated waste water mix through tempering tank, regulate COD and inject aerobic airlift loop bioreactor, after intermittently taming in 3 days, water inlet continuously, the adjusting hydraulic detention time is 13-15h, water outlet COD clearance is higher than 75% and improves water inlet COD concentration, and gradient domestication enrichment active sludge is through the mixture of water inlet in 11 days for not diluted anaerobism water outlet and pretreated waste water, the activity carbon carrier that adds reactor volume 5%, operation is 10 days continuously, and the microbial film immobilization is finished, and aerobic airlift loop bioreactor starts to be finished; Aerobic airlift loop bioreactor water outlet directly enters the aeration biological filter bed of inoculation 15% aerobic activated sludge, aeration biological filter bed effective volume 4.05L, body skin diameter 125mm, height 375mm, draft tube diameter 65mm, height 360mm is full of outputted aerobic water, and intermittent aeration is after 3 days, water inlet continuously, the control vapour-liquid ratio is 7: 1, and hydraulic detention time 7-8h is normal temperature 18-25 ℃ of operation down.
Operation continuously: maize straw alcohol fuel distillation waste water COD 34500-35000mg/L, ammonia nitrogen 58.1-61.2mg/L, pH 4.1-4.3; Pretreated waste water COD 890-910mg/L, ammonia nitrogen 581-598mg/L; 53-55 ℃ of anaerobic fluidized bed bioreactor operation temperature, flow rate 11.3m/h on the liquid, hydraulic detention time 55h; 33-35 ℃ of aerobic airlift loop bioreactor service temperature, gas reduced superficial velocity 13mm/s, hydraulic detention time 15h; Aeration biological filter bed service temperature 18-25 ℃, vapour-liquid ratio 7: 1, hydraulic detention time 8h; Integrated system moves 60 days continuously, and water outlet COD is 87.1mg/L, and ammonia nitrogen is 12.3mg/L.
Anaerobic fluidized bed bio-reactor effective volume 7L, body skin diameter 100mm, height 1000mm, draft tube diameter 75mm, height 800mm; Aerobic airlift loop bioreactor effective volume 10L, body skin diameter 110mm, height 1100mm, draft tube diameter 70mm, height 900mm; Aeration biological filter bed effective volume 4.65L, body skin diameter 130mm, height 390mm, draft tube diameter 70mm, height 360mm; Anaerobic fluidized bed reactor is inoculated 40% anaerobic sludge, add 7% activated carbon granule, aerobic Airlift circulating reactor inoculation aerobic sludge 30%, add activated carbon granule 4%, aeration biological filter bed inoculation aerobic sludge 12%, load the gac of height for reactor 75% thickness, press method startup integrating device among the embodiment 1.
Maize straw alcohol fuel distillation waste water COD 24500-25000mg/L, ammonia nitrogen 50.3-55.5mg/L, pH 4.4-4.5; Pretreated waste water COD 751-783mg/L, ammonia nitrogen 513.2-526.7mg/L; The circulation bioreactor service temperature is 53-55 ℃ in the anaerobism, flow rate 10.5m/h on the liquid, hydraulic detention time 45 hours; 33-35 ℃ of aerobic airlift loop bioreactor service temperature, gas reduced superficial velocity 11.5mm/s, hydraulic detention time 10h; 18-25 ℃ of BAF service temperature, vapour-liquid ratio 6: 1, hydraulic detention time 5h; Integrated system moves 60 days continuously, and water outlet COD is 71.3mg/L, and ammonia nitrogen is 7.8mg/L.
Anaerobic fluidized bed bio-reactor effective volume 10L, body skin diameter 120mm, height 1080mm, draft tube diameter 80mm, height 900mm; Aerobic airlift loop bioreactor effective volume 10L, body skin diameter 115mm, height 1150mm, draft tube diameter 80mm, height 1000mm; Aeration biological filter bed effective volume 7.5L, body skin diameter 150mm, height 450mm, draft tube diameter 100mm, high 400mm; Anaerobic fluidized bed reactor is inoculated 30% anaerobic sludge, add 5% activated carbon granule, aerobic Airlift circulating reactor inoculation aerobic sludge 20%, add activated carbon granule 3%, aeration biological filter bed inoculation aerobic sludge 10%, load the gac of height for reactor 70% thickness, press method startup integrating device among the embodiment 1.
Maize straw alcohol fuel distillation waste water COD 15000-15500mg/L, ammonia nitrogen 38.1-40.5mg/L, pH 4.6-4.7; Pretreated waste water COD 652-683mg/L, ammonia nitrogen 450-463mg/L; The circulation bioreactor service temperature is 53-55 ℃ in the anaerobism, flow rate 8m/h on the liquid, hydraulic detention time 30h; 33-35 ℃ of aerobic airlift loop bioreactor service temperature, gas reduced superficial velocity 8mm/s, hydraulic detention time 6h; 18-25 ℃ of BAF service temperature, vapour-liquid ratio 5: 1, hydraulic detention time 4h; Integrated system moves 60 days continuously, and water outlet COD is 63.1mg/L, and ammonia nitrogen is 4.2mg/L.
The present invention is not limited to the technology described in the example; its description is illustrative; and it is nonrestrictive; authority of the present invention is limited by claim; based on present technique field personnel according to the present invention can change, technology related to the present invention that method such as reorganization obtains, all in protection scope of the present invention.
Claims (3)
1. a maize straw alcohol fuel high density is distilled the treatment unit of waste water and high ammonia nitrogen pretreated waste water, device is positioned at the follow-up wastewater treatment stage of fuel ethanol production technology, water inlet is respectively from the high ammonia nitrogen pretreated waste water of stalk pretreatment stage and the distillation waste water of ethanol distillation technology, and it is characterized in that becoming reconciled at anaerobic fluidized bed bio-reactor (2) is provided with anaerobism water outlet and pretreated waste water tempering tank (8) between the oxygen lift-type circulation bioreactor (9); Be provided with fluidized-bed reactor guide shell (3) and triphase separator (5) in the anaerobic fluidized bed bio-reactor, the axis of anaerobic fluidized bed bio-reactor (2) body skin and fluidized-bed reactor guide shell (3) is overlapping, and the top is provided with triphase separator (5); Be provided with loop reactor guide shell (10) in the aerobic airlift loop bioreactor (9), the axis of aerobic airlift loop bioreactor body skin and loop reactor guide shell is overlapping, aerobic airlift loop bioreactor top is provided with negative area (12), and the negative area connects the settling vessel (19) of peripheral hardware by the road; Be provided with filter bed guide shell (22), water distributor (24) and gas distributor (25) in the anaerobism aeration biological filter bed (21), the axis of bio-filter bed reactor body skin and filter bed guide shell is overlapping, filter bed guide shell (22) top is provided with water distributor (24), the bio-filter bed reactor bottom is provided with gas distributor (25), peripheral hardware backwashing pump (26).
2. treatment unit as claimed in claim 1 is characterized in that described anaerobic fluidized bed bio-reactor (2), is provided with cylindrical shell body, aspect ratio 9: 1-11: 1, in establish cylindrical guide shell, draft tube diameter is the 65-75% of body skin, the guide shell height is the 80-85% of body skin; Described aerobic airlift loop bioreactor (9) is provided with cylindrical shell body, and the body skin cross section is circular, aspect ratio 10: 1, in establish cylindrical guide shell, draft tube diameter is the 65-70% of body skin, the guide shell height is the 85-90% of body skin; Described anaerobism aeration biological filter bed (21) is provided with cylindrical shell body, and the body skin cross section is circular, and aspect ratio is 3: 1, in establish cylindrical guide shell, draft tube diameter is the 50-65% of body skin, the guide shell height is the 90-95% of body skin.
3. the treatment process of maize straw alcohol fuel high density distillation waste water and high ammonia nitrogen pretreated waste water is characterized in that step is as follows:
1) anaerobic fluidized bed bio-reactor is by the water-in seed sludge, inoculum is a common sewage work anaerobic sludge, inoculum size is the 25-50% of reactor volume, add the activated carbon particle carrier that the particle diameter that accounts for reactor volume 5-10% is 0.8-1.3mm simultaneously, the maize straw alcohol fuel distillation waste water that adds 5 times of tap water dilutions, 53-55 ℃ of controlling reactor temperature, flow rate 8.0-11.3m/h on the liquid, intermittently tamed 5-8 days, water inlet continuously then, improve reactor organic loading 30-50% when water outlet COD clearance is higher than 75%, directly intake, advanced continuously former water 10-20 days to former water, be stabilized in 80-90% to the COD clearance, active sludge adheres to the formation microbial film in the reactor on carrier, finishes the startup anaerobic reactor, can carry out maize straw alcohol fuel distillation anaerobic waste water one-level and handle;
2) start the anaerobic fluidized bed bio-reactor of finishing with the step 1) method, maize straw alcohol fuel high density distillation waste water, pH 4.1-4.7, COD 15000-35000mg/L, suspension content SS 3760-9015mg/L; 53-55 ℃ of anaerobic reactor operating temperature, intake pump is regulated hydraulic detention time 30-55h, and reflux pump is regulated the water outlet reflux rate, make in the reactor that flow rate reaches 8.0-11.3m/h on the liquid, water outlet is spilled over to settling vessel, and through natural subsidence, supernatant liquor is intake as Airlift circulating reactor;
3) airlift loop bioreactor inoculation municipal sewage plant aerobic sludge, inoculum size is the 20-40% of reactor volume, adding particle diameter is the activated carbon particle carrier of 0.8mm-1.3mm, dosage is the 3-5% of reactor volume, pretreated waste water COD is 652-910mg/L, ammonia nitrogen is 450-598mg/L, the anaerobism water outlet is through natural subsidence, supernatant liquor and high ammonia nitrogen pretreated waste water, with volume ratio 1: 4-1: 6 mixings, be diluted to the 20%-50% of original content with tap water, inject aerobic airlift loop bioreactor, regulate charge flow rate, the beginning aeration, intermittently domestication, every 24h or COD and ammonia nitrogen removal frank are greater than changing water at 75% o'clock, intermittently tamed 3-5 days, water inlet continuously then, water inlet COD and ammonia nitrogen removal frank were greater than 75% o'clock raising influent concentration 20-50%, directly intake to the anaerobism water outlet, water inlet is 10-15 days continuously, reactor obtains the aerobic activated sludge that high reactivity is rich in the nitration denitrification bacterium, aerobic water inlet COD clearance is higher than 85%, ammonia nitrogen removal frank is higher than 90%, and active sludge forms microbial film attached on the carrier, finish the aerobic airlift loop bioreactor of startup, can carry out the aerobic treatment of distillation anaerobic waste water water outlet of maize straw alcohol fuel and pretreated waste water;
4) start the aerobic airlift loop bioreactor of finishing with the step 3) method, pretreated waste water COD is 652-910mg/L, ammonia nitrogen is 450-598mg/L, the anaerobism water outlet is through natural subsidence, and supernatant liquor and high ammonia nitrogen pretreated waste water are with volume ratio 1: 4-1: 6 mixings, inject aerobic airlift loop bioreactor, temperature of reactor is controlled at 33-35 ℃, hydraulic detention time 6-15h, and gas void tower rate-controlling is at 8-13mm/s;
5) aeration biological filter bed filling accounts for the cylindric absorbent charcoal carrier of height for reactor 70-80% thickness, particle diameter 1-2mm, inoculation 10-15% is from the unnecessary mud of the discharge of aerobic Airlift circulating reactor, be full of outputted aerobic water, intermittent aeration 3-5 days, outputted aerobic water was intake continuously then, and reactor is 18-25 ℃ of operation down, hydraulic detention time 4-8h, vapour-liquid ratio remains on 5: 1-7: 1.
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| CN110204036A (en) * | 2019-07-16 | 2019-09-06 | 大连民族大学 | A kind of multistage vertical variable diameter guide flow cylinder center Airlift circulating reactor |
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