CN103193366B - Integrated treatment method of corn alcohol wastewater - Google Patents
Integrated treatment method of corn alcohol wastewater Download PDFInfo
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- CN103193366B CN103193366B CN201310160586.3A CN201310160586A CN103193366B CN 103193366 B CN103193366 B CN 103193366B CN 201310160586 A CN201310160586 A CN 201310160586A CN 103193366 B CN103193366 B CN 103193366B
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Abstract
The invention relates to an integrated treatment method of corn alcohol wastewater. The method is high in biochemical efficiency, simple to operate and low in treatment cost. Biochemical effluent is superior to a discharge standard of fermentation alcohol wastewater, and deep effluent meets a requirement of make-up water of industrial recycling cooling water. The method comprises the steps that a grid intercepts a thick and big suspended matter; the wastewater is cooled; a pH value of the wastewater is adjusted; the wastewater with the pH value being adjusted is pump into a hydrolytic acidification tank, and subjected to hydrolytic acidification, and then to anaerobic treatment by an internal recycling up-flow anaerobic sludge blanket; partial wastewater after the anaerobic treatment is subjected to aerobic treatment by a filling cyclic activated sludge system method; partial wastewater not subjected to the anaerobic treatment flows back to a water inlet of the up-flow anaerobic sludge blanket, and then enters the up-flow anaerobic sludge blanket for the anaerobic treatment; blasting is required in the aerobic treatment process; and the wastewater after the aerobic treatment enters an intermediate water well, is precipitated in a coagulative precipitation tank, then enters a multi-medium filter for filtering, and is disinfected. The method is simple to operate, low in treatment cost, and high in biochemical efficiency.
Description
Technical field
The present invention relates to wastewater treatment, particularly a kind of integrated processing method of corn alcohol waste water.
Background technology
Corn alcohol waste water is distillation leftover---the alcohol residue (high concentrated organic wastewater) of simple distillation tower bottom discharge when distillation fermenting-ripening wine with dregs taking corn as raw material, and washing water (middle concentration organic waste water) and water coolant in production process.Corn alcohol wastewater discharge is large, and the waste water that 1 ton of alcohol of every production is discharged is 10 ~ 14 tons, is the important source of pollution of alcohol industry.Corn alcohol waste water principal pollutant are CODcr, NH3-N, SS, and its concentration is respectively at 3000 ~ 15000mg/L, 10 ~ 35mg/L, between 800 ~ 2500mg/L.Other pollutent mainly comprises: be suspended in grease, starch, glue in waste water; Be dissolved in sugar in water, acid, alkali, salt etc.; Average water temperature reaches 75 DEG C, and the wastewater temperature of discharging at the bottom of still kettle is up to 100 DEG C; Suspension content is high, and wherein organism accounts for 94% ~ 95%, and ash content accounts for 5% ~ 6%; Outward appearance muddiness, colourity are high, easily corrupt.Waste water color is darker, can not directly enter water body, otherwise can affect the photosynthesis of waterplant and algae, reduces oxygen in water concentration, thereby affects the growth of hydrocoles.Corn alcohol waste water is acid (pH is generally lower than 5.5), contains phosphoric acid salt and organic acid, and corrodibility is strong.Crops is not only burnt in the direct irrigation and drainage of these organic acids and mineral acid farmland to death, and makes soil compaction.In addition, in corn alcohol waste water, contain a large amount of low molecular compounds, as butanols, ethanol, acetone etc., and the organism such as a large amount of carbohydrate, nitrogen compound, fat, the content of nitrogen and phosphorous is high, if directly discharge can cause body eutrophication.
The treatment process adopting both at home and abroad is at present mainly biochemical treatment process.
Main component in corn alcohol waste water mostly is the available nutritive substance of microorganism, and the biodegradability of waste water is good, therefore more often adopts biochemical process to process to this waste water both at home and abroad.The feature high according to this class concentration of organic wastewater, the method for employing is mainly anaerobism+aerobic treatment.Biochemical process is the method the most widely that current corn alcohol wastewater treatment adopts, and has obtained certain removal effect.But still exist weak point: the anaerobic treatment time is longer, reactor initial start-up process is slow, and in corn alcohol waste water, concentration of suspension is high, has limited the operating performance of anaerobic reactor.Winter operation is unstable, large to the fluctuation of ammonia nitrogen removal effect.Since implementing in January, 2012 " fermentation alcohol and liquor industry pollution discharge standard ", grain distillery's Wastewater Pollutant discharge is no longer carried out " integrated wastewater discharge standard " (GB8978-1996), operative norm strict, has phenomenon not up to standard while having caused the waste water of part grain distillery discharge.Simultaneously anaerobic process and aerobic method are not obvious to the chromaticity removing effect of corn alcohol waste water, therefore explore a kind of easy and simple to handle, treatment effect good, less investment, corn alcohol waste water treatment process that working cost is low are problems of needing solution badly.
Summary of the invention
For above-mentioned situation, for overcoming the defect of prior art, the present invention's object is just to provide a kind of integrated processing method of corn alcohol waste water, can effectively solve that biochemical efficiency is high, simple to operate, processing costs is low, bio-chemical effluent is better than fermentation alcohol wastewater discharge standard, the problem that degree of depth water outlet simultaneously meets industrial circulating cooling water and supplements water water quality requirement.
The technical scheme that the present invention solves is first to regulate wastewater pH at equalizing tank, by the waste water acidifying pre-treatment that is hydrolyzed, to remove part suspended substance in waste water, improve the biodegradability of waste water, acidication hydraulic detention time is 10 ~ 12h, to carry out internal recycle upflow anaerobic sludge reactor (UASB claims again upflow anaerobic sludge blanket process) anaerobic treatment through acidication waste water after treatment again, the unlatching of internal recycle can be from main regulation upflow anaerobic sludge reactor (UASB) volumetric loading, and then the waste water after anaerobic treatment is carried out to filler Cyclic Activated Sludge System (CASS) aerobic treatment, finally adopt coagulating sedimentation-filtration and sterilization process to carry out advanced treatment the waste water after aerobic treatment, the steps include: that grid tackles thick suspended substance, through cooling tower cooling, enter equalizing tank and regulate pH value, waste water after adjust pH is pumped into hydrolysis acidification pool, after acidication through internal recycle upflow anaerobic sludge reactor anaerobic treatment, part waste water after anaerobic treatment carries out filler Cyclic Activated Sludge System aerobic treatment, without the part return of waste water of anaerobic treatment to upflowing anaerobic sludge reactor water-in, again enter upflow anaerobic sludge reactor, carry out anaerobic treatment, in Aerobic, to carry out air blast, well in the middle of waste water after aerobic treatment enters, carry out again after coagulative precipitation tank precipitation, entering hypermedia strainer filters, after sterilization, can reach emission standard, recycling.
That the integrated treatment technology of the present invention has is simple to operate, processing costs is low, biochemical efficiency is high, and degree of depth water outlet can meet " Code for design of industrial recirculating cooling water treatment " (GB50050-2007) requirement, is that one in corn alcohol wastewater treatment innovated greatly.
Brief description of the drawings
Fig. 1 is process flow sheet of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.
Provided by accompanying drawing, the present invention, in concrete enforcement, first regulates wastewater pH at equalizing tank; By the waste water acidifying pre-treatment that is hydrolyzed, to remove part suspended substance in waste water, improve the biodegradability of waste water, acidication hydraulic detention time is 10-12h; To carry out internal recycle upflow anaerobic sludge reactor (UASB claims again upflow anaerobic sludge blanket process) anaerobic treatment through acidication waste water after treatment again, the unlatching of internal recycle can be from main regulation upflow anaerobic sludge reactor (UASB) volumetric loading; And then the waste water after anaerobic treatment is carried out to filler Cyclic Activated Sludge System (CASS) aerobic treatment, and finally adopt coagulating sedimentation-filtration and sterilization process to carry out advanced treatment the waste water after aerobic treatment, its concrete steps are:
(1) waste water is first removed thick suspended substance through the grid interception of spacing 5mm after entering sewage plant, enter again cooling tower wastewater temperature is down to 38-40 DEG C, cooling tower water outlet is from flowing into equalizing tank, and regulating wastewater pH by sodium hydroxide lye is 6.0 ± 0.5, and equalizing tank surface load is 0.7-0.8m
3/ m
2h, hydraulic detention time 2.5-3h;
(2) waste water after pH regulator is pumped into the hydrolysis acidification pool acidifying that is hydrolyzed, hydraulic detention time is 10-12h; Through the waste water of acidication, wastewater flow rate is made as Q
1, pump into internal recycle upflow anaerobic sludge reactor water inlet pipe, the waste water that part refluxes by upflow anaerobic sludge reactor internal circulation apparatus simultaneously, the wastewater flow rate of backflow is made as Q
2, being incorporated in the water inlet pipe of internal recycle upflow anaerobic sludge reactor, in water inlet pipe, the water yield is made as Q, Q=Q
1+ Q
2, reflux ratio Q
2︰ Q
1=50-300 ︰ 100(is Q
2︰ Q
1=50-300%), by its bottom water distribution system mixed waste water is evenly distributed in internal recycle upflow anaerobic sludge reactor, thereby realize volumetric loading from main regulation;
(3) waste water after internal recycle upflow anaerobic sludge reactor anaerobic treatment is carried out to aerobic treatment from flowing into filler Cyclic Activated Sludge System pond, the volumetric loading in filler Cyclic Activated Sludge System pond is 0.3-0.5 kgBOD/m
3d, be 2.0-2.5mg/L, sludge concentration 4000-5000 mg/L, the pond water outlet of filler Cyclic Activated Sludge System well in the middle of flowing into by regulating dissolved oxygen concentration in gas blower aeration control pond, the hydraulic detention time of middle well is 3-4h;
(4) will pump into coagulative precipitation tank through step (3) waste water after treatment, simultaneously carry out coagulation, every processing 1m by volume pump to adding polyaluminium sulfate (PAS) in pond
3waste water polyaluminium sulfate dosage is 60g; Coagulating sedimentation water outlet pumps into more medium filter, fills gravel, quartz sand, hard coal medium in more medium filter from top to bottom; Adopt dioxide peroxide (ClO
2) producer is to filtering water outlet disinfection, every 1m
3in waste water, dioxide peroxide dosage is 20g; After disinfecting, become and reach " Code for design of industrial recirculating cooling water treatment " (GB50050-2007) requirement.
In order to ensure result of use, internal reflux pipeline is set up in gap between the granular mud bed and triphase separator of the main part of described internal recycle upflow anaerobic sludge reactor, internal circulation system contributes to regulate wastewater temperature and pH value, improve upflow velocity, promote muddy water mixing efficiency, shorten upflow anaerobic sludge reactor start-up phase and granule sludge culture cycle, improve the dirty water decontamination handles efficiency, reduce end and process pollution load (processing the higher problem of pollution load to solve end); Internal circulation system is by regulating reflux ratio to realize autonomous volume adjusted load;
Described filler Cyclic Activated Sludge System pond, by straining at reaction tank below hydrophone 0.5m, bottom, pond 1.0m arranges net cage above, in net cage, (suspension ball is commercially available prod to filling diameter 8cm suspension ball, as high in Henan, Gongyi City plumbing equipment factory, the product of Hebei Yao Xing plastics factory) as Cyclic Activated Sludge System pond filler, filler can effectively be avoided the shearing of aeration bubble to its surface biological film, reducing current washes away biomembranous, thereby be conducive to microorganic adhesion, biofilm thickness increases gradually, final biofilm thickness is probably at 0.4mm, create the condition of simultaneous nitrification and denitrification, make some generation times longer, the nitrifier less than value-added speed adhered to breeding, finally reach CASS pond enhanced biological nitrogen removal effect, in microbial film, biophase is abundant, has extended microorganism food chain, has improved biomass, thereby promotes the impact resistance in CASS pond, dosing of filler can be reduced sludge yield in addition, thereby is difficult for producing sludge bulking.
Also it should be noted that:
(1) grid
Due to the large floating matter in corn alcohol waste water and particulate matter all fewer, the pollutent of grid interception is few, selects artificial scarfing cinder mode; Grill space 5mm.
(2) cooling tower
Because corn alcohol wastewater temperature is too high, exceed the scope that microorganism can bear, need be down to 38 ~ 40 DEG C by stable waste water by cooling tower, so that follow-up biological process is carried out smoothly.
(3) equalizing tank
Because corn alcohol waste water is acid waste water, waste water ph is lower is not suitable for middle temperature methanogen growth, need to add alkali and regulate waste water to 6.0 left and right, so that follow-up biological process is carried out smoothly.
(4) hydrolysis acidification pool
Equalizing tank water pumps in hydrolysis acidification pool.Hydrolysis acidification pool has been created the acidifying that is hydrolyzed of certain amphimicrobian environment to sewage, there is the Hydrolysis Acidification of anaerobic treatment, the material decomposition of difficult degradation is become to the easily organic substrates of degraded, waste water is because acidification part is converted into voltaile fatty acid simultaneously, and the filler in pond can be removed part suspended substance in waste water by adsorption in addition.Anaerobic reactor partial reflux water pumps into internal recycle UASB reactor after mixing with acidication water outlet, to reduce anaerobic reactor entering organic matter of water concentration.Hydrolysis acidification pool hydraulic detention time is 10 ~ 12h.
(5) internal recycle UASB reactor
Internal recycle UASB sets up internal circulation apparatus in reactor triphase separator bottom, internal circulation system contributes to regulate wastewater temperature and pH, can improve upflow velocity, promote muddy water mixing efficiency, obviously shorten UASB reactor start-up phase and granule sludge culture cycle, improve the dirty water decontamination handles efficiency, organism in removal waste water by a relatively large margin, can solve end and process the higher problem of pollution load; Internal circulation system can be by regulating reflux ratio to realize autonomous volume adjusted load in addition.
(6) filler CASS pond
Internal recycle UASB water outlet is from flowing in filler CASS pond, and flooding velocity regulates and controls by distribution apparatus.In filler CASS pond, make good use of the effect of oxygen animalcule, organism in waste water is further degraded, thereby waste water is purified, well in the middle of water outlet enters.Filler CASS pond bottom is provided with microporous aeration device, is 2.0 ~ 2.5mg/L by regulating dissolved oxygen concentration in gas blower aeration control pond, and top is established and strained hydrophone and carry out draining, and volumetric loading is 0.3 ~ 0.5 kgBOD/ (m
3d), sludge concentration 4000 ~ 5000 mg/L.
(7) well in the middle of
Enter coagulative precipitation tank in order to ensure waste water with stable flow velocity and load, well in the middle of arranging, filler CASS water outlet is well in the middle of flowing into, and middle well hydraulic detention time is 3 ~ 4h.
(8) coagulative precipitation tank
Waste water after aerobic treatment, by being pumped to coagulative precipitation tank, is simultaneously carried out to coagulation, every processing 1m by volume pump to adding PAS in pond
3waste water PAS dosage is 60g.
(9) more medium filter
Coagulating sedimentation water outlet pumps into more medium filter, fills the media such as gravel, quartz sand, hard coal in strainer from top to bottom, by the adsorption of strainer medium, can effectively remove suspended substance and colourity in waste water.
(10) sterilization pool
Filter water outlet and flow automatically into sterilization pool, adopt ClO
2producer carries out disinfection to filtering water outlet, every processing 1m
3waste water ClO
2dosage is 20g, meets industrial circulating cooling water and supplement water requirement after filtration water outlet is sterile-processed.
Can find out by stating, treatment process of the present invention is the COMBINED PROCESS that adopts the UASB anaerobic treatment+filler CASS aerobic treatment+coagulating sedimentation-filtration of pre-treatment+internal recycle and sterilization process advanced treatment.Waste water first passes through acidication processing, can reduce the concentration of hard-degraded substance and inhibition ion, the biodegradability of part suspended substance and raising waste water in removal waste water; Enter internal recycle UASB anaerobic treatment workshop section through acidication waste water after treatment, utilize most of organism in anaerobion degradation water; Anaerobic effluent carries out filler CASS aerobic treatment, further degradation of organic substances again; Turbidity of wastewater, microbial biomass after aerobic treatment are all larger, finally adopt coagulating sedimentation-filtration and sterilization process advanced treatment, advanced treatment system can be according to the treatment effect of biochemical system by regulating chemical feeding quantity to ensure that effluent quality meets recirculated cooling water and supplements water requirement.That the integrated treatment technology of the present invention has is simple to operate, processing costs is low, biochemical efficiency is high, ensure that degree of depth effluent quality meets industrial circulating cooling water and supplements the advantages such as water requirement.
The present invention, through experiment and test, has obtained good useful technique effect, as:
experimental example 1
Henan corn distillery adopts the inventive method to process this factory's waste water, and former water COD is 3500 mg/L left and right, designing treatment amount 2000m
3, equalizing tank surface load 0.8m
3/ m
2h, hydraulic detention time 2.5h, hydrolyzing regulation pond hydraulic detention time 10h, volumetric loading 4.75 kgCOD/m of internal recycle UASB reactor
3d, upflow velocity is 0.45m/h, the volumetric loading 0.4kgBOD/m in CASS pond
3d, dissolved oxygen 2.5mg/L, sludge concentration 4500mg/L, outputted aerobic water COD average out to 60mg/L, NH
3-N average out to 0.8mg/L, every processing 1m
3waste water PAS dosage is 60g,, in more medium filter, fill the media such as gravel, quartz sand, hard coal from top to bottom, Filled Dielectrics height 1.2m, disinfects COD average out to 45mg/L, the NH of water outlet finally by crossing
3-N average out to 0.7mg/L, meets industrial circulating cooling water and supplements water requirement.
experimental example 2
Henan corn distillery adopts the inventive method to process this factory's waste water, and former water COD is 10000 mg/L left and right, designing treatment amount 2000m
3, equalizing tank surface load 0.8m
3/ m
2h, hydraulic detention time 2.5h, hydrolyzing regulation pond hydraulic detention time 12h, volumetric loading 13.4 kgCOD/m of internal recycle UASB reactor
3d, upflow velocity is 0.3m/h, the volumetric loading 0.5kgBOD/m in CASS pond
3d, dissolved oxygen 2.5mg/L, sludge concentration 4500mg/L, outputted aerobic water COD average out to 65mg/L, NH
3-N average out to 1.0mg/L, every processing 1m
3waste water PAS dosage is 60g,, in more medium filter, fill the media such as gravel, quartz sand, hard coal from top to bottom, Filled Dielectrics height 1.2m, disinfects COD average out to 50mg/L, the NH of water outlet finally by crossing
3-N average out to 0.8mg/L, meets industrial circulating cooling water and supplements water requirement.
Test in different places and different factory through repeated multiple times, all obtained identical or akin result, show that method is reliable and stable, result of use is good, after tested: sterile-processed rear COD≤50mg/L, NH
3-N≤1.0mg/L, SS≤5mg/L, turbidity≤5NTU, total Fe≤0.3mg/L and carbonate alkalinity≤100mg/L, meet " Code for design of industrial recirculating cooling water treatment " process water requirement (GB50050-2007), well meet industrial circulating cooling water and supplement water requirement, realize the recycling of corn alcohol waste water, reduce environmental pollution, economize on resources and sewage disposal expense more than 1 times, production efficiency and biochemical efficiency improve more than 50%, economic and social benefit is huge, is that one in corn alcohol wastewater treatment created greatly.
Claims (3)
1. an integrated processing method for corn alcohol waste water, is characterized in that, first regulates wastewater pH at equalizing tank; By the waste water acidifying pre-treatment that is hydrolyzed, to remove part suspended substance in waste water, improve the biodegradability of waste water, acidication hydraulic detention time is 10-12h; To carry out internal recycle upflow anaerobic sludge reactor anaerobic treatment through acidication waste water after treatment again, the unlatching of internal recycle can be loaded from main regulation upflow anaerobic sludge reactor volume; And then the waste water after anaerobic treatment is carried out to filler Cyclic Activated Sludge System aerobic treatment, and finally adopt coagulating sedimentation-filtration and sterilization process to carry out advanced treatment the waste water after aerobic treatment, its concrete steps are:
(1) waste water is first removed thick suspended substance through the grid interception of spacing 5mm after entering sewage plant, enter again cooling tower wastewater temperature is down to 38-40 DEG C, cooling tower water outlet is from flowing into equalizing tank, and regulating wastewater pH by sodium hydroxide lye is 6.0 ± 0.5, and equalizing tank surface load is 0.7-0.8m
3/ m
2h, hydraulic detention time 2.5-3h;
(2) waste water after pH regulator is pumped into the hydrolysis acidification pool acidifying that is hydrolyzed, hydraulic detention time is 10-12h; Through the waste water of acidication, wastewater flow rate is made as Q
1, pump into internal recycle upflow anaerobic sludge reactor water inlet pipe, the waste water that part refluxes by upflow anaerobic sludge reactor internal circulation apparatus simultaneously, the wastewater flow rate of backflow is made as Q
2, being incorporated in the water inlet pipe of internal recycle upflow anaerobic sludge reactor, in water inlet pipe, the water yield is made as Q, Q=Q
1+ Q
2, reflux ratio Q
2︰ Q
1=50-300 ︰ 100, by its bottom water distribution system mixed waste water is evenly distributed in internal recycle upflow anaerobic sludge reactor, thereby realize volumetric loading from main regulation;
(3) waste water after internal recycle upflow anaerobic sludge reactor anaerobic treatment is carried out to aerobic treatment from flowing into filler Cyclic Activated Sludge System pond, the volumetric loading in filler Cyclic Activated Sludge System pond is 0.3-0.5 kgBOD/m
3d, is 2.0-2.5mg/L, sludge concentration 4000-5000 mg/L by regulating dissolved oxygen concentration in gas blower aeration control pond, and the pond water outlet of filler Cyclic Activated Sludge System is well in the middle of flowing into, and the hydraulic detention time of middle well is 3-4h;
(4) will pump into coagulative precipitation tank through step (3) waste water after treatment, simultaneously carry out coagulation, every processing 1m by volume pump to adding polyaluminium sulfate (PAS) in pond
3waste water polyaluminium sulfate dosage is 60g; Coagulating sedimentation water outlet pumps into more medium filter, fills gravel, quartz sand, hard coal medium in more medium filter from top to bottom; Adopt dioxide peroxide (ClO
2) producer is to filtering water outlet disinfection, every 1m
3in waste water, dioxide peroxide dosage is 20g.
2. the integrated processing method of corn alcohol waste water according to claim 1, it is characterized in that, internal reflux pipeline is set up in gap between the granular mud bed and triphase separator of the main part of described internal recycle upflow anaerobic sludge reactor, internal circulation system contributes to regulate wastewater temperature and pH value, improve upflow velocity, promote muddy water mixing efficiency, shorten upflow anaerobic sludge reactor start-up phase and granule sludge culture cycle, improve the dirty water decontamination handles efficiency, reduce end and process pollution load, internal circulation system is by regulating reflux ratio to realize autonomous volume adjusted load.
3. the integrated processing method of corn alcohol waste water according to claim 1, it is characterized in that, described filler Cyclic Activated Sludge System pond, by straining at reaction tank below hydrophone 0.5m, bottom, pond 1.0m arranges net cage above, in net cage, filling diameter 8cm suspension ball is as Cyclic Activated Sludge System pond filler, filler can effectively be avoided the shearing of aeration bubble to its surface biological film, reducing current washes away biomembranous, thereby be conducive to microorganic adhesion, biofilm thickness increases gradually, final biofilm thickness is probably at 0.4mm, create the condition of simultaneous nitrification and denitrification, make some generation times longer, the nitrifier less than value-added speed adhered to breeding, finally reach CASS pond enhanced biological nitrogen removal effect, in microbial film, biophase is abundant, has extended microorganism food chain, has improved biomass, thereby promotes the impact resistance in CASS pond, dosing of filler can be reduced sludge yield in addition, thereby is difficult for producing sludge bulking.
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| CN109320029A (en) * | 2018-12-13 | 2019-02-12 | 湖南大辰环保科技有限公司 | Liquor production wastewater processing method and system |
| CN112299640B (en) * | 2019-07-26 | 2022-10-18 | 杭州维清环保工程有限公司 | Method for treating waste mash of corn alcohol |
| CN110981085A (en) * | 2019-12-03 | 2020-04-10 | 南宁市科潮酒精技术开发有限责任公司 | Treatment method and recovery process of alcohol production wastewater |
| CN110950493B (en) * | 2019-12-04 | 2022-08-30 | 金徽酒股份有限公司 | White spirit production wastewater treatment system and method |
| CN113620538B (en) * | 2021-08-26 | 2023-05-26 | 李任帅 | Process for treating high-concentration pit bottom wastewater of Maotai-flavor white spirit |
| CN115093074A (en) * | 2022-06-08 | 2022-09-23 | 四川建筑职业技术学院 | Corn brewing wastewater treatment system and technology |
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