CN101007694A - Process for treating alcohol waste water - Google Patents
Process for treating alcohol waste water Download PDFInfo
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- CN101007694A CN101007694A CNA2007100614342A CN200710061434A CN101007694A CN 101007694 A CN101007694 A CN 101007694A CN A2007100614342 A CNA2007100614342 A CN A2007100614342A CN 200710061434 A CN200710061434 A CN 200710061434A CN 101007694 A CN101007694 A CN 101007694A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
Abstract
The invention discloses a disposing method of alcohol wastewater in the waste water disposal technology, which comprises the following steps: filter-pressing waste dreg liquid after first depositing through plate filter press; drying the solid through drying-machine to get DDG protein feed; discharging the waste water after anaerobic treatment; assembling waste water to secondary sedimentation; adding supernatant into allocate pot; adjusting COD, pH and temperature of waste water in the reactor through adding alkaline reflux yielding water and clear-water; putting allocate pot into EGSB anaerobic reactor to proceed anaerobic fermentation biochemical treatment; controlling reacting temperature at 36-38 deg.c; separating marsh gas; settling sludge, clarifying; yielding water through trinomial segregator from waste water. The invention possesses scientific craft, which can save energy resource.
Description
Technical field
The present invention relates to a kind of water technology, specifically a kind of treatment process of alcohol waste water.
Background technology
In the production process of edible ethanol, can produce a large amount of waste dregs liquids, after solid-liquid separation was extracted the poor feed of alcohol, its filtrate just became waste water and discharges outside the factory with it.Because contain a large amount of organic substances in the waste water, so environment has been caused serious pollution.
The pollution that China alcohol enterprise alcohol is poor is one of the most serious source of pollution of food and fermentation industries, and owing to reasons such as investment, industrial scale, technology, management, the comprehensive utilization ratio of some alcohol enterprise is lower, and waste water treatment also is to start to walk soon.Though also there is the waste water treatment facility in some enterprise, fail to adhere to operation.
Administer at present both at home and abroad alcohol waste lees solution more common mainly contain two kinds of forms: the one, alcohol tank liquid after the filter press solid-liquid separation, is produced the DDG feed with the solid substance oven dry, filtrate then effluxes after anaerobic technique reduces organic content; Another is to concentrate through multiple-effect to produce the full lees feeds of DDGS.Because it is that kinetic energy consumption is few that anaerobic technique is administered the maximum characteristics of waste water, be fit to the processing of high concentrated organic wastewater, the calorific value of the biogas that produces has very high utility value greater than the energy that consumes in the anaerobism simultaneously, so be the main technique that domestic and international Alcohol Production is handled waste water.At present, anaerobic technique generally adopts novel anaerobic grain sludge expanded bed (EGSB) technology and traditional UASB technology.The general high-temperature cultivation that adopts 58 ℃-60 ℃ of EGSB technology, such high-temperature anaerobic fermentation weak point are to need to consume a large amount of energy, especially in the winter of cold, guarantee that anaerobic hot operation difficulty is very big, and the very difficult ordinary production that guarantees is implemented.
In addition, in the production process of edible ethanol, can produce a large amount of waste dregs liquids, it is after solid-liquid separation is extracted the poor feed of alcohol, and the filtrate of generation just becomes waste water to be discharged outside the factory, and environment is caused very big pollution.Handle alcohol waste lees solution if adopt solid-liquid separation to add hotblast stove oven dry feed process, can consume a large amount of fire coals.Burning of coal is except meeting pollutes atmosphere, and coal-fired hot blast is directly dried feed, also nuisances such as flue dust, ashes can be taken in the feed, has influenced the quality of feed.And a large amount of energy of coal-fired meeting waste, the coal that my company is used for the feed oven dry every year just reaches 6000 tons.
Summary of the invention
Goal of the invention of the present invention is the many defectives at contaminate environment in the background technology and thermophilic fermentation consumes energy, provide a kind of EGSB reactor of efficient operation under mesophilic condition that alcohol waste water is handled, both produced renewable energy source---biogas, saved the required energy of high temperature anaerobic reactor operation again, and replace coal-fired oven dry lees feeds fully with the biogas that produces, save the energy, the treatment process of free of contamination alcohol waste water.
New through looking into, though the bibliographical information of relevant alcohol waste water treatment process and recycling is more both at home and abroad, and processing mode is varied, but Shang Weijian and this alcohol waste water treatment process that project complex art characteristics are identical, scale is suitable and the bibliographical information of recycling.
Realize the foregoing invention purpose by the following technical solutions: a kind of treatment process of alcohol waste water, comprise the blend tank, interchanger, the EGSB reactor that use in the treating processes, described treatment process is:
A, with waste dregs liquid that alcohol produced through the preliminary laggard andante frame of sedimentation pressure filter press filtration, its solid substance becomes the DDG protein fodder after with the baker oven dry, filtrate becomes waste water, effluxes after anaerobic treatment;
B, waste water (filtrate) is collected through secondary settlement, supernatant liquor heats through plate-type heat exchanger with pump earlier, getting to blend tank again allocates, by adding alkali, recycling effluent, adding COD, pH value and temperature that clear water adjustment enters reactor waste water, then it is entered the EGSB anaerobic reactor by blend tank and carry out the anaerobically fermenting biochemical treatment, the controlling reactor temperature is at 36-38 ℃, and reflux ratio is at 30-50%; Advance the reactor waste water COD at 6000-12000mg/L, the pH value is at 4.5-6.0; Water outlet COD is below 1000mg/L, and the pH value forms a large amount of high-activity particle mud simultaneously and operates in swelling state at 6.8-7.3, and the waste water after the Anaerobic Digestion is isolated biogas, sedimentation mud, clarification and effluent through three separators;
C, alcohol waste water are after anaerobic treatment, and biological degradation rate reaches more than 96%, and water outlet COD is less than 1000mg/L, and BOD reaches three grades of emission standards of national sewage less than 600mg/L.
D, institute is produced biogas be used for drying lees feeds and all replace coal-fired.
Because adopt technique scheme, biological degradation rate of the present invention can reach more than 96%, waste water COD is less than 1000mg/L, and BOD meets three grades of emission standards of GB GB8978-1996 sewage less than 600mg/L, can drain into municipal sewage pipe network.This technology has also produced a large amount of clean energy biogas simultaneously and has been used to dry feed.So promptly solve the alcohol waste water environmental pollution problems, saved the energy again.Controlled temperature of the present invention is at 36 ℃-38 ℃, compares with high temperature anaerobic technology and greatly saved the energy.
Description of drawings
Accompanying drawing 1 is a process flow sheet of the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing 1.
In order to administer the pollution of alcohol waste water to environment, save energy, improve the quality of feed, and make alcohol waste water obtain resource utilization effectively to utilize, turn waste into wealth, the present invention has adopted middle temperature EGSB anaerobic ferment process, handles alcohol (being pickled with grains or in wine) waste water.Concrete technology is referring to top accompanying drawing.
A, with waste dregs liquid that alcohol produced through preliminary sedimentation after the plate-and-frame filter press press filtration, its solid substance becomes DDG (distillers driedgrains) protein fodder after with the baker oven dry, filtrate becomes waste water, drains into wastewater disposal basin and carries out secondary settlement.
B, the wastewater supernatant fluid after the wastewater disposal basin sedimentation is collected into the waste water storage tank, heat through plate-type heat exchanger with pump earlier, Heating temperature is 40-60 ℃, getting to blend tank again allocates, by adding alkali 0-0.5 ‰, recycling effluent, adding clear water 0-30% and adjust COD, pH value and the temperature that enters reactor waste water, then the waste water that modulates is added to the EGSB anaerobic reactor by blend tank and carries out the anaerobically fermenting biochemical treatment in the blend tank.In the reactor of this EGSB reaction unit mud is housed, waste water by reactor bottom evenly enter with anaerobic reactor in mud fully contact, mix and carry out anaerobic reaction.Control EGSB temperature of reactor is at 36-38 ℃, and reflux ratio is at 30-50%; Advance the blend tank waste water COD at 6000-12000mg/L, the pH value is at 4.5-6.0; Water outlet COD is below 1000mg/L, and the pH value is at 6.8-7.3.Organism is decomposed under the anaerobic bacteria flora effect in the sewage, forms a large amount of high-activity particle mud simultaneously and operate in swelling state in reactor, and the waste water after the Anaerobic Digestion is isolated biogas, Digestive system through three separators.Digestive system part Returning reactor, a part settles into mud and clarification and effluent is a waste water up to standard through settling bowl.
C, alcohol waste water are after anaerobic treatment, and biological degradation rate reaches more than 96%, and water outlet COD is less than 1000mg/L, and BOD reaches three grades of emission standards of national sewage less than 600mg/L.
D, institute is produced biogas be used for drying lees feeds and all replace coal-fired.
EGSB reactor of the present invention is the representative of third generation anaerobic reactor, has unit volume organic loading height, stable, COD clearance advantages of higher, be characterized in granular mud bed by adopting bigger upflow velocity to operate in swelling state, therefore its successful key is to form a large amount of high-quality granule sludges, rather than a large amount of cotton-shaped suspension mud.What the present invention adopted is mesophilic digestion technology, can reduce the energy consumption in the fermenting process effectively.Waste water is behind anaerobically fermenting, its organic content can reduce greatly, until qualified discharge, has so promptly solved the waste water environmental pollution problems, and also do not had coal burning pollution and influenced the problem of feed quality with biogas burning oven dry lees feeds, guaranteed quality of the fodder.Can get by calculating, adopt solid-liquid separation to add hotblast stove oven dry feed process, handle alcohol waste lees solution, filtrate be carried out producing methane through anaerobic fermentation oven dry feed again, its biogas has enough and to spare.
Use the key problem in technology of EGSB reactor: the key of anaerobic grain sludge expanded bed technology success is to form a large amount of highly active granule sludges, and can not be cotton-shaped suspension mud.The formation of the thread flora of methane when the formation key of granule sludge is cultivation, and the thread flora of methane must can form advantage under low volatile acid state.If the thread flora of bacterium mud methane of inoculation is not preponderated or keep high volatile acid state when cultivation, thereby just can not forming the advantage of the thread flora of methane, anaerobic system can not form granule sludge, this reactor will maintain lower load level, can not reach the ideal processing power.Want to make reactor to reach efficient operation, just must make and form a large amount of highly active granule sludges in the reactor.Centering temperature anaerobic technique is exactly to form high-activity particle mud under middle temperature culture condition.It is key problem in technology of the present invention that anaeration in normal temperature forms granule sludge, temperature, pH value to the treatment effect influence of reactor see Table 1, table 2.
Table 1 temperature is to the treatment effect influence of reactor
| Culture temperature (℃) | Water outlet anaerobism mud ratio (%, V/V) | Water outlet pH value | Water outlet COD (mg/L) |
| 32 34 36 38 | 10 7 5 4 | 6.86 6.92 7.02 7.06 | 1291 1145 982 956 |
| 40 | 5 | 7.10 | 1104 |
Table 2 pH is to the treatment effect influence of reactor
| Advance the preceding waste water ph of reactor (allotment back) | Water outlet anaerobism mud ratio (%, V/V) | Water outlet pH | Water outlet COD (mg/L) |
| 4.5 5.0 5.5 6.0 | 10 7 5 4 | 6.76 6.84 7.00 7.12 | 1466 1187 992 943 |
| 6.5 | 4 | 7.28 | 926 |
Annotate: culture temperature is 36 ℃-38 ℃.
The formation of high-activity particle mud: with the anaerobically digested sludge of municipal sewage plant as anaerobic species, wide material sources, but since inoculation be common cotton-shaped suspension mud rather than granule sludge, can cause processing efficiency low, processing speed is slow.So must cultivate, breed, tame it, produce a large amount of highly active granule sludges.
Through the test more than 2 years and produce and to grope repeatedly, the formation of high-activity particle mud under the centering temperature EGSB processing condition, optimization below some processing parameters and condition:
(1), seed sludge chooses thicker anaerobically digested sludge, inoculum size is the 10-30% of anaerobic jar volume, it is oversize to have lacked the cultivation time, it is many that then bacterium mud cost is too high.Inoculate as much as possible during the condition permission, can shorten the cultivation time.The inoculum size that my company's first cover anaerobic reactor adopts is 15%.Inoculation is adopted is mud in the former anaerobic pond of my unit.The second cover reactor inoculum size is 20%, employing be the ripe granule sludge of the first cover reactor because inoculum size is big, the mud superior performance starts soon especially, only just reaches day output in 2 months and be 500 tons designed capacity.
(2), keep stable envrionment conditions and operational conditions, as temperature, pH etc., the amount of carrying steadily.
(3), the initial sludge loading of control is 0.5-1kgCOD/ (m
3.d), dosage progressively again after operation is normal is to increase the pneumatic classification effect and to improve treatment capacity.
(4), the original and VFA that produces promptly keeps under the acetate condition of lower concentration the raising organic loading after fully decomposing in waste water.
(5), the control hydraulic load, make anaerobic jar keep bigger hydraulic classification effect, wash away the light weight sludge flco.When COD concentration is higher, adopts and reflux or dilution.
(6), control water inlet COD concentration is not more than 9000-12000mg/l, so that keep bigger hydraulic load and low volatile acid concentration.
(7), provide an amount of inorganic particles in the water inlet, increasing pellet density, stable particle intensity provides bacterium rely adherent core or natural support.
(8), anaerobic sludge is to SO
4 2Certain patience and domestication property are arranged, through the process of a domestication, control SO
4 2-Concentration forms granule sludge in the 300mg/l scope.
(9), distiller's grains liquor need do repeatedly sedimentation pre-treatment, throw out and crystalline increase in the organic loading that causes because of solid substance in the clear liquid and the anaerobic jar to reduce.
According to technique scheme, my company is 25000-35000mg/L to untreated corn alcohol waste water index COD, BOD is 12000-16000mg/L, after EGSB anaerobically fermenting novel process is handled, biological degradation rate reaches more than 96%, waste water COD is less than 1000mg/L, and BOD has accomplished energy-conservation and regeneration changing rejected material to useful resource less than 600mg/L.By producing 3.3 ten thousand tons of Ebullioscopes per year, 2,850,000 yuan of the profits of can making profits in year are economized on coal 6000 tons.
The present invention has saved a large amount of coal resources carrying out utilizing institute's biogas that produces to replace raw coal to dry when alcohol waste water administers, and has also reduced raw coal combustion exhaust gas discharged pollution in atmosphere.And what this project adopted is again the anaeration in normal temperature treatment process of less energy-consumption, has just further saved the energy.Can handle 330,000 tons of alcohol waste waters project year, produce 6,000,000 cubes of biogas, economize on coal 6000 tons, 9600 tons of year degraded COD, 4500 tons of BOD, and make the waste water and gas qualified discharge that is produced in my company's Alcohol Production process.In addition, for high temperature anaerobic technology, but every year more piece coal 0.02 * 330,000=6600 ton also.
In the time of the anaerobism successful operation, can produce a large amount of clean energy biogas, if nationwide alcohol industry feed oven dry has thoroughly replaced the burning coal with burning biogas, then present domestic alcohol industry waste water treatment situation will greatly be taken on a new look, not only can solve organism and coal combustion exhaust and efflux the environmental pollution that brings, improve feed quality, can also accomplish that the recycling treatment of waste water is utilized again, save energy turns waste into wealth.By 5,000,000 tons of national alcohol annual production, 3,500,000 tons in feed, the oven dry of ton feed can be economized on coal 87.5 ten thousand tons with 0.25 ton of measuring and calculating of coal in national alcohol industry year, 45,500 ten thousand yuan of the profits of making profits in year more.
Claims (1)
1, a kind of treatment process of alcohol waste water comprises the blend tank, the EGSB reactor that use in the treating processes, and three separators is characterized in that, described treatment process is:
A, with waste dregs liquid that alcohol produced through preliminary sedimentation after the plate-and-frame filter press press filtration, its solid substance becomes the DDG protein fodder after with the baker oven dry, filtrate becomes waste water, effluxes after anaerobic treatment;
B, wastewater collection is got up through secondary settlement, supernatant liquor heats through interchanger with pump earlier, getting to blend tank again allocates, by adding the alkali recycling effluent, adding COD, pH value and temperature that clear water adjustment enters reactor waste water, then it is entered the EGSB anaerobic reactor by blend tank and carry out the anaerobically fermenting biochemical treatment, the controlling reactor temperature is at 36-38 ℃, and reflux ratio is at 30-50%; Advance the reactor waste water COD at 6000-12000mg/L, the pH value is at 4.5-6.0; Water outlet COD is below 1000mg/L, and the pH value forms a large amount of high-activity particle mud simultaneously and operates in swelling state at 6.8-7.3, and the waste water after the Anaerobic Digestion is isolated biogas, sedimentation mud, clarification and effluent through three separators;
C, alcohol waste water are after anaerobic treatment, and biological degradation rate reaches more than 96%, and water outlet COD is less than 1000mg/L, and BOD is less than 600mg/L;
D, institute is produced biogas be used for drying lees feeds and all replace coal-fired.
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| CNA2007100614342A CN101007694A (en) | 2007-01-19 | 2007-01-19 | Process for treating alcohol waste water |
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| CNA2007100614342A CN101007694A (en) | 2007-01-19 | 2007-01-19 | Process for treating alcohol waste water |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101955386A (en) * | 2010-06-05 | 2011-01-26 | 赵德智 | Organic compound fertilizer produced with liquor-making waste residues and production method |
| CN102660447A (en) * | 2012-05-28 | 2012-09-12 | 德阳华宇瑞得智能科技有限公司 | Comprehensive treatment and resource recycling method for wine brewing wastes |
| CN103058366A (en) * | 2013-01-18 | 2013-04-24 | 北京市环境保护科学研究院 | Culture method for anaerobic granular sludge for acrylic waste water biochemical treatment |
| CN105417844A (en) * | 2015-11-12 | 2016-03-23 | 北京首钢朗泽新能源科技有限公司 | Fermentation wastewater processing method and biological feed |
| CN109502839A (en) * | 2018-11-14 | 2019-03-22 | 金煊策 | A kind of skyscraper kitchen waste water processing method and its integrated treating device |
| CN112960853A (en) * | 2021-02-07 | 2021-06-15 | 南京钛净流体技术有限公司 | Membrane treatment method of corn alcohol mash |
-
2007
- 2007-01-19 CN CNA2007100614342A patent/CN101007694A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101955386A (en) * | 2010-06-05 | 2011-01-26 | 赵德智 | Organic compound fertilizer produced with liquor-making waste residues and production method |
| CN101955386B (en) * | 2010-06-05 | 2014-10-08 | 赵德智 | Organic compound fertilizer produced with liquor-making waste residues and production method |
| CN102660447A (en) * | 2012-05-28 | 2012-09-12 | 德阳华宇瑞得智能科技有限公司 | Comprehensive treatment and resource recycling method for wine brewing wastes |
| CN102660447B (en) * | 2012-05-28 | 2013-06-05 | 德阳华宇瑞得智能科技有限公司 | Comprehensive treatment and resource recycling method for wine brewing wastes |
| CN103058366A (en) * | 2013-01-18 | 2013-04-24 | 北京市环境保护科学研究院 | Culture method for anaerobic granular sludge for acrylic waste water biochemical treatment |
| CN105417844A (en) * | 2015-11-12 | 2016-03-23 | 北京首钢朗泽新能源科技有限公司 | Fermentation wastewater processing method and biological feed |
| CN109502839A (en) * | 2018-11-14 | 2019-03-22 | 金煊策 | A kind of skyscraper kitchen waste water processing method and its integrated treating device |
| CN112960853A (en) * | 2021-02-07 | 2021-06-15 | 南京钛净流体技术有限公司 | Membrane treatment method of corn alcohol mash |
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