CN1013193B - Process for treatment of waste water from distillers' grains - Google Patents
Process for treatment of waste water from distillers' grainsInfo
- Publication number
- CN1013193B CN1013193B CN89105925A CN89105925A CN1013193B CN 1013193 B CN1013193 B CN 1013193B CN 89105925 A CN89105925 A CN 89105925A CN 89105925 A CN89105925 A CN 89105925A CN 1013193 B CN1013193 B CN 1013193B
- Authority
- CN
- China
- Prior art keywords
- waste water
- treatment
- distillers
- grains
- distiller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
- Y02P60/87—Re-use of by-products of food processing for fodder production
Landscapes
- Distillation Of Fermentation Liquor, Processing Of Alcohols, Vinegar And Beer (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The present invention relates to a process for the treatment of waste water from distillers' grains. Firstly, the waste water from distillers' grains is filtered in vacuum under the condition that the vacuum degree is not smaller than 600 mmhg, and then, the solid-liquid separation liquid is respectively used for making anaerobic fermentation treatment and aerobic treatment. After the waste water from distillers' grains is treated according to the method of the present invention, the COD value can be reduced more than 99.4%, and the present invention can obtain the profit of the recovery of fodder, the provision of methane gas, etc.
Description
The present invention is a kind of distiller's wort wastewater treatment method.
To the various trade effluents that contain a large amount of organic impuritys and the purifying treatment of sanitary sewage, mainly is to take anaerobism or aerobic or this two processing mode that combines at present.If the solid shape residue thing in waste water or the sewage is more, general normal elder generation removes residue by modes such as precipitations, then liquid is made anaerobism or aerobic treatment.All introduce to some extent in this respect as documents such as Chinese patent CN86101481A.
Distiller's wort waste water is the high density pollution waste water that produces behind fermentative production alcohol or drinks goods with various starch materials, wherein containing solid residue and water soluble components such as a large amount of plant crude fibers, starch, crude protein, alcohol, aldehyde, candy, thereby its COD(chemical oxygen demand) Chang Gaoda is tens thousand of.Because the plant pectin matter composition that contains in this waste water is many, so viscosity is big, solid residue almost can not sedimentation, and common filtration means also are difficult to carry out.Make it reach the emission standard that country allows to this class waste water if adopt ordinary method to do thoroughly to handle, not only floor space is wide, the time cycle of handling is long, about 2-3 month, and it is costly, even the brewery of 300 cubic metres of waste water of daily output, the sewage disposal expense also will be up to millions of units, and this is that current any one tame enterprise both at home and abroad all is difficult to the expense of bearing economically.Therefore, do to discharge after conventional anaerobism or the aerobic treatment though at present this class distiller's wort waste water is had, but no matter the sewage that is discharged is color and luster, or COD or BOD(biological oxygen demand) etc. every index all do not reach the emission standard that country allows far away, still to cause environmental pollution.Some factory even this class waste water do not dealt with direct discharging, even more serious to the pollution of environment undoubtedly.
The purpose of this invention is to provide a kind of process for treatment of waste water from distillers ' grains fast and effectively, and make the useful thing in the waste water obtain utilizing as far as possible.
At the composition and the characteristic trait of distiller's wort waste water, treatment process of the present invention divided for three steps carried out.At first distiller's wort waste water is not less than in vacuum tightness under the condition of 600 mmhg and carries out vacuum filtration.For reducing filtration difficulty, filtration can be carried out in various rotation drum type filter plants, especially to carry out to good in the Barrate type filter plant that has positive negative pressure alternate area.Under vacuum condition, these equipment can make quickly and effectively solid residue in the distiller's wort waste water about 80% with liquid separation.After these residue compositions recovery and further dehydration, drying and the pulverizing, can be used as the feed of livestock.If be equipped with an amount of bone meal, fish meal, trace element etc. again, be exactly good compound concentrated feed.Removed most solid residue by the first step separation, the COD value of distiller's wort waste water can be reduced to 2.5-2.8 ten thousand by the 4.5-5.8 ten thousand before separating.Second step of treatment process of the present invention is to carry out conventional anaerobically fermenting with having separated the waste liquid behind the solid residue, produces biogas, is made for the energy and uses.After this step processing, the COD value of waste water can further drop to below 5000.Waste water after the anaerobic treatment remakes aerobic treatment, as adopts conventional pressurization consumption gas and activated sludge process, or method such as bio-disc system, is the 3rd step of the inventive method.After this three steps processing, general equal the reducing to below 350 of the COD value of waste water reaches the emission standard that country allows.
This shows, after adopting treatment process of the present invention, can make the COD value of the distiller's wort waste water of high density pollution reduce more than 99.4%, not only solved the problem of environmental pollution of distiller's wort waste water effectively, and in treating processes, fully reclaim and utilized useful component wherein again, turn harm into good, become simple expensive wastewater treatment into can self-compensation situation and can obtain the comprehensive treating process process of huge income, its environmental benefit, social benefit and economic benefit all can not be ignored.For example only economically, except that investments such as a spot of equipment of need when the inventive method the first step is handled, along with the feed that reclaims and the generation of biogas, this part investment can progressively be compensated and can therefrom obtain income for a long time.This at least from economically for the thorough radical cure of distiller's wort waste water and apply support on the financial charges that provides strong, make the generally improvement of the distiller's wort waste water of serious environment pollution become possibility.
Introduce a specific examples below as content of the present invention.
The distiller's wort waste water that certain grain distillery's day discharging is 200 cubic metres, about 96 ℃ of feed temperature, pH4.5, COD are 5.2 ten thousand.Be not less than under the 600 mmhg conditions with the Barrate type filter vacuum filtration that has positive negative pressure alternate area in vacuum tightness, unit feed liquid treatment capacity is 10 tons/hour.Filter residue through dehydration and dry to water content be 15-18%, make feed after the pulverizing and use, can get feed 12-14 ton.It is about 2.9 ten thousand to filter the COD of rear filtrate, about 55 ℃ of temperature.This filtrate is sent into upflow sludge blanket through triphase separator three hours, directly make anaerobically fermenting, produce biogas, about 4000 cubic metres of aerogenesis (but every cubic metre waste liquid aerogenesis about 20 cubic metres).Waste liquid COD is lower than 5000 after the anaerobic treatment.At last with this waste liquid through the flocculation sediment of routine separate, after the active sludge treatment, the COD value is 350, (the BOD value is 250).The whole wastewater treatment cycle is 1-2 days.The annual economic return that only can increase 4-5 times by feed and two of biogas.
Claims (1)
1, a kind ofly includes anaerobic treatment or/and process for treatment of waste water from distillers ' grains after the drinks production of articles of aerobic treatment process, it is characterized in that the first step earlier is not less than vacuum filtration under 600 millimeters conditions of showing post with distiller's wort waste water in vacuum tightness, the solid shape residue of filtering, the liquid after the solid-liquid separation is made anaerobically fermenting more successively and is handled and aerobic treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89105925A CN1013193B (en) | 1989-06-21 | 1989-06-21 | Process for treatment of waste water from distillers' grains |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89105925A CN1013193B (en) | 1989-06-21 | 1989-06-21 | Process for treatment of waste water from distillers' grains |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1040971A CN1040971A (en) | 1990-04-04 |
| CN1013193B true CN1013193B (en) | 1991-07-17 |
Family
ID=4856559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN89105925A Expired CN1013193B (en) | 1989-06-21 | 1989-06-21 | Process for treatment of waste water from distillers' grains |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1013193B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101265000B (en) * | 2008-04-03 | 2011-06-29 | 江南大学 | Method for treating waste water in grape wine brewage |
-
1989
- 1989-06-21 CN CN89105925A patent/CN1013193B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1040971A (en) | 1990-04-04 |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |