CN111268840B - Method for recycling and treating salt in waste water of yeast drum - Google Patents
Method for recycling and treating salt in waste water of yeast drum Download PDFInfo
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- CN111268840B CN111268840B CN202010116593.3A CN202010116593A CN111268840B CN 111268840 B CN111268840 B CN 111268840B CN 202010116593 A CN202010116593 A CN 202010116593A CN 111268840 B CN111268840 B CN 111268840B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
- C02F2103/325—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters from processes relating to the production of wine products
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
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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
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Abstract
The invention discloses a method for recycling and treating salt in yeast drum wastewater, which comprises the following steps of firstly, preheating the yeast drum wastewater to a certain temperature, and then carrying out membrane filtration and desalination by a membrane filtration system to obtain a concentrated solution and a filtrate; then, the filtrate is subjected to heat recovery by a heat recovery system and then is input into an RO membrane filtration system for RO membrane filtration to obtain salt-containing filtrate and filtered clear liquid; and finally, inputting the salt-containing filtrate into an aeration tank for aeration treatment or inputting the salt-containing filtrate into an evaporation concentration system for further evaporation concentration treatment. The invention solves the problems of high recovery cost and uneconomic quality of the salt-containing wastewater after desalting the yeast drum wastewater in the prior art.
Description
Technical Field
The invention belongs to the technical field of yeast wastewater treatment, and particularly relates to a method for recycling and treating yeast drum wastewater salt.
Background
The fermentation industry is a processing industry which takes grains and agricultural and sideline products as main raw materials. It mainly includes alcohol, monosodium glutamate, starch, white liquor, citric acid and starch sugar. In terms of national conditions, deep processing and industrialization of crops and economic crops are core means for promoting sustainable development of agricultural economy, improving income of farmers, improving urban and rural gaps and realizing balanced development of national economy. But the sustainable development of the fermentation industry is restricted by the problems of large water consumption, serious pollution of discharged wastewater and the like in the fermentation industry. Therefore, the development of an efficient and energy-saving actual wastewater treatment and recycling process technology suitable for the fermentation industry in China is one of the key links for solving the problems. The fermentation industrial wastewater mainly comprises: separating and extracting waste mother liquor and waste lees liquor after the product is extracted, and various flushing water, detergent and cooling water in processing and production engineering; the waste mother liquor and waste lees liquor after the product is separated and extracted account for 90% of the discharge amount of the waste water, belong to high-concentration organic waste liquor, contain abundant proteins, amino acids, vitamins, saccharides and a plurality of trace elements, have the characteristics of high concentration, high suspended matters, high viscosity, poor hydrophobicity and difficult degradation, and cause the waste water treatment difficulty to be very large and the cost to be high.
In the prior art, a common treatment mode of yeast drum wastewater is to separate organic matters from salt in the wastewater (namely wastewater desalination treatment), and from the economic point of view, if the salt-containing wastewater (the salt content is about 2%) separated after the wastewater desalination treatment is concentrated and recovered, the value of the recovered salt is lower than the recovery cost, and the effect-cost ratio is a negative value, so the salt is generally not concentrated and recovered, but is discharged into a biochemical pool or returned to production for recycling after adding salt; returning to the production and adding salt for recycling, although not increasing other cost, only a small amount of salt can be recycled, and residual organic matters (alcohols and amines) in the filtrate may influence the quality of the yeast; for water-deficient areas, salt-containing wastewater separated after wastewater desalination treatment directly enters a biochemical pond for biochemical treatment and then is discharged, so that soil salinization can be caused, and the ecological environment is seriously harmed; in view of the above, there is a need to design an effective method for recovering and treating salt in waste water from a yeast drum.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides a salt recovery treatment method for yeast drum wastewater, which is used for solving the problems of high salt recovery cost and uneconomic quality of the salt-containing wastewater after desalting the yeast drum wastewater in the prior art.
In order to achieve the technical effects, the invention adopts the technical scheme that:
a method for recycling and treating salt in waste water of a yeast drum comprises the following process steps:
s1, desalting wastewater: preheating the yeast drum wastewater to a certain temperature, and performing membrane filtration and desalination by a membrane filtration system to obtain a concentrated solution and a filtrate;
s2, concentrating the filtrate: the filtrate is subjected to heat recovery by a heat recovery system and then is input into an RO membrane filtration system for RO membrane filtration to obtain salt-containing filtrate and filtered clear liquid;
s3, salt-containing filtrate treatment: and (4) inputting the salt-containing filtrate into an aeration tank for aeration treatment or inputting the salt-containing filtrate into an evaporation concentration system for further evaporation concentration treatment.
Further, the membrane filtration system in the wastewater desalination treatment in the step S1 adopts a three-stage membrane filtration system, which is a ceramic membrane filtration system, an ultrafiltration membrane filtration system and a nanofiltration membrane filtration system in sequence, and the filtrate is the final filtrate filtered by the nanofiltration membrane.
And further, the salt-containing filtrate treatment in the step S3 is to input the salt-containing filtrate into an aeration tank for aeration treatment, and the supernatant obtained after aeration treatment is sent to a biochemical tank for biochemical treatment, and the obtained supernatant is recycled.
And step S3, the salt-containing filtrate is processed by inputting the salt-containing filtrate into an evaporation concentration system for further evaporation concentration, the salt water obtained after evaporation concentration by the evaporation concentration system is recycled, and the evaporated condensate water enters a washing system after heat recovery and is used as ground washing water to wash the ground and then enters a biochemical pool for biochemical treatment.
Further, a membrane element adopted by the RO membrane filtration system in the filtrate concentration treatment in the step S2 is an A101-4040F reverse osmosis membrane SE or SG.
Compared with the prior art, the invention has the beneficial effects that:
the invention solves the problems of high salt recovery cost and uneconomic recovery of the salt-containing wastewater after desalting the yeast drum wastewater in the prior art, can recover more salt and reduces the salt recovery cost.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the embodiments, and it is apparent that the described embodiments are some, but not all embodiments of the present invention.
Drawings
Fig. 1 is a process flow diagram of a first embodiment of the invention.
FIG. 2 is a flow chart of a second process of the present invention.
Detailed Description
The first embodiment is as follows:
a method for recycling and treating salt in waste water of a yeast drum comprises the following process steps:
s1, desalting wastewater: the yeast drum wastewater is preheated to 27 ℃ for the first time through a heat exchanger of a heat recovery system, then enters a constant temperature regulation system to be preheated to 60-95 ℃ again, and then sequentially passes through a ceramic membrane filtration system, an ultrafiltration membrane filtration system and a nanofiltration membrane filtration system to carry out three-stage membrane filtration and desalination, wherein membrane elements adopted by the ceramic membrane filtration system, the ultrafiltration membrane filtration system and the nanofiltration membrane filtration system can be 4040-series membrane elements, the nanofiltration membrane filtration system adopts a 201-4040F nanofiltration membrane with the cutting molecular weight of 300-500d and the material of TFM, the ultrafiltration membrane filtration system adopts a roll-type ultrafiltration membrane with the cutting molecular weight of 3500-10000d, and the ceramic membrane filtration system adopts a roll-type microfiltration membrane with the cutting molecular weight of 0.04-0.3 micron. And respectively feeding the concentrated solution obtained by the third filtration into an MVR evaporation system, and feeding the final filtrate obtained by the third filtration into a heat recovery system.
S2, concentrating the filtrate: the filtrate after heat recovery enters an RO membrane filtration system for RO membrane filtration to obtain salt-containing filtrate and filtered clear liquid; wherein, the membrane element adopted by the RO membrane filtration system is an A101-4040F reverse osmosis membrane SE or SG.
S3, salt-containing filtrate treatment: and S3, salt-containing filtrate treatment, namely inputting the salt-containing filtrate into an aeration tank for aeration treatment, and sending the supernatant obtained after the aeration treatment to a biochemical tank for biochemical treatment to obtain the supernatant for recycling.
Example two:
the wastewater desalination treatment in step S1 and the filtrate concentration treatment in step S2 in this embodiment are the same as those in the first embodiment, except that in step S3, the salt-containing filtrate is treated, specifically, the salt-containing filtrate is input into an evaporation concentration system for further evaporation concentration treatment, and is subjected to evaporation concentration by the evaporation concentration system to obtain brine for recycling, and the evaporated condensate water is subjected to heat recovery and then enters a washing system as ground washing water to wash the ground, and then enters a biochemical treatment in a biochemical pond.
The yeast drum wastewater is desalted by three-stage membrane filtration during the wastewater desalting treatment, the filtrate is desalted by an RO membrane, so that the filtrate is concentrated into 9-14% salt-containing filtrate, the lower clear liquid part can be used for producing saline water by yeast or other purposes by an aeration process, the upper turbid liquid part is discharged into a biochemical pool, and the filtered clear liquid filtered by the RO membrane can be recycled as pure water, so that more salt can be recycled by the process, and the quality of the yeast is also ensured when the yeast drum wastewater is recycled for yeast production. The 9-14% salt-containing filtrate obtained by filtering through the RO membrane is sent to an evaporation concentration system, the salt content in the material can be further concentrated to 26% or even higher, and the evaporation condensed water is used as ground washing water after heat recovery, although the investment cost and the operation cost are increased by the process, the purity of the salt water is higher (because organic matters in the raw water are light components which are easy to volatilize and most of the organic matters are transferred into the evaporation condensed water), and the recovered salt content is more. In a word, compared with the prior art, the method can recover more salt, and the influence on the quality of the yeast is effectively reduced when the salt is recycled in the production; the waste water discharged in the later period also reduces the salinization of the soil and the serious harm to the ecological environment, and the filtered clear liquid obtained by the RO membrane filtration, the lower clear liquid obtained by the aeration treatment of the aeration tank, the salt water obtained by the evaporation concentration and the evaporation condensate water can be recycled in the process of the method, so that the utilization rate is improved to the maximum extent, and the heat on part of process nodes can be fully recycled, thereby effectively reducing the salt recovery cost of the salt-containing waste water, and being economical and practical.
The present invention is not limited to the above-described embodiments, and various modifications made without inventive step from the above-described concept will fall within the scope of the present invention for those skilled in the art.
Claims (2)
1. A method for recycling and treating salt in waste water of a yeast drum is characterized by comprising the following process steps:
s1, desalting wastewater: sequentially preheating the yeast drum wastewater to 27 ℃ through a heat exchanger of a heat recovery system for the first time, then entering a constant temperature regulation system for preheating to 60-95 ℃ again, and sequentially performing membrane filtration and desalination through a three-stage membrane filtration system to obtain a concentrated solution and a filtrate; the final filtrate obtained by the third filtration enters a heat recovery system;
s2, concentrating the filtrate: after heat recovery, the filtrate is input into an RO membrane filtration system for RO membrane filtration to obtain salt-containing filtrate and filtered clear liquid;
s3, salt-containing filtrate treatment: inputting the salt-containing filtrate into an aeration tank for aeration treatment or inputting the salt-containing filtrate into an evaporation concentration system for further evaporation concentration treatment;
the membrane filtration system in the wastewater desalination treatment in the step S1 adopts a three-level membrane filtration system, namely a ceramic membrane filtration system, an ultrafiltration membrane filtration system and a nanofiltration membrane filtration system in sequence, and the filtrate is the final filtrate filtered by the nanofiltration membrane;
s3, salt-containing filtrate treatment is to input the salt-containing filtrate into an aeration tank for aeration treatment, and supernatant obtained after aeration treatment is sent to a biochemical tank for biochemical treatment, and obtained supernatant is recycled;
and S3, salt-containing filtrate treatment is to input the salt-containing filtrate into an evaporation concentration system for further evaporation concentration treatment, the salt water obtained after evaporation concentration by the evaporation concentration system is recycled, and the evaporated condensate water enters a washing system after heat recovery and is used as ground washing water to wash the ground and then enters a biochemical pool for biochemical treatment.
2. The method for recycling and treating the salt in the waste water of the yeast drum as claimed in claim 1, wherein the method is characterized in that ， And in the step S2, a membrane element adopted by the RO membrane filtration system in the filtrate concentration treatment is an A101-4040F reverse osmosis membrane SE or SG.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1336333A (en) * | 2001-09-25 | 2002-02-20 | 清华同方股份有限公司 | Membrane separation process of treating soybean processing waste water |
| CN1528768A (en) * | 2003-09-29 | 2004-09-15 | 武汉泰古投资有限公司 | Method for treating waste water of chinese yam saporin and recovering gluocose and hydrochloric acid by membrane integrating technique |
| CN101007239A (en) * | 2006-12-20 | 2007-08-01 | 华南理工大学 | Multi-ultrafiltration concentrated separation system and method |
| CN102329036A (en) * | 2011-09-06 | 2012-01-25 | 江苏中圣高科技产业有限公司 | High-efficiency method for recovery treatment of saliferous wastewater under zero emission through residual heat utilization |
| CN104355431A (en) * | 2014-11-12 | 2015-02-18 | 湖北加德科技股份有限公司 | Device capable of efficiently treating and recycling reverse osmosis concentrated water and high-salt wastewater |
| CN109081478A (en) * | 2018-09-15 | 2018-12-25 | 南京霄祥工程技术有限公司 | A kind for the treatment of process of fermentation waste water |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104787823B (en) * | 2015-04-17 | 2017-03-15 | 黑龙江鑫达晟机械科技有限公司 | Yeast wastewater Zero discharge treatment method |
| US10202286B2 (en) * | 2015-06-22 | 2019-02-12 | Eureka Resources, Llc | Method and system for treating wastewater |
| US20170107132A1 (en) * | 2015-10-14 | 2017-04-20 | New Century Membrane Technology Co., Ltd. | Recycling treatment system for tannery wastewater |
| CN110228891A (en) * | 2019-07-22 | 2019-09-13 | 四川省川南酿造有限公司 | A kind of preparation method of brine waste MVR condensing crystallizing |
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- 2020-02-25 CN CN202010116593.3A patent/CN111268840B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1336333A (en) * | 2001-09-25 | 2002-02-20 | 清华同方股份有限公司 | Membrane separation process of treating soybean processing waste water |
| CN1528768A (en) * | 2003-09-29 | 2004-09-15 | 武汉泰古投资有限公司 | Method for treating waste water of chinese yam saporin and recovering gluocose and hydrochloric acid by membrane integrating technique |
| CN101007239A (en) * | 2006-12-20 | 2007-08-01 | 华南理工大学 | Multi-ultrafiltration concentrated separation system and method |
| CN102329036A (en) * | 2011-09-06 | 2012-01-25 | 江苏中圣高科技产业有限公司 | High-efficiency method for recovery treatment of saliferous wastewater under zero emission through residual heat utilization |
| CN104355431A (en) * | 2014-11-12 | 2015-02-18 | 湖北加德科技股份有限公司 | Device capable of efficiently treating and recycling reverse osmosis concentrated water and high-salt wastewater |
| CN109081478A (en) * | 2018-09-15 | 2018-12-25 | 南京霄祥工程技术有限公司 | A kind for the treatment of process of fermentation waste water |
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Denomination of invention: A Method for Salt Recovery and Treatment of Yeast Drum Wastewater Effective date of registration: 20230410 Granted publication date: 20230131 Pledgee: Bank of China Limited Suzhou Xiangcheng sub branch Pledgor: SUZHOU XIANGMING CHEMICAL EQUIPMENT Co.,Ltd. Registration number: Y2023980037733 |