CN111036035A - Method for recycling waste water of yeast fermentation leaching tower - Google Patents
Method for recycling waste water of yeast fermentation leaching tower Download PDFInfo
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- CN111036035A CN111036035A CN201911376529.2A CN201911376529A CN111036035A CN 111036035 A CN111036035 A CN 111036035A CN 201911376529 A CN201911376529 A CN 201911376529A CN 111036035 A CN111036035 A CN 111036035A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1406—Multiple stage absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1412—Controlling the absorption process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1418—Recovery of products
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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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
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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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
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention discloses a method for recycling waste water of a yeast fermentation leaching tower, which is used for at least two stages of waste gas leaching towers, wherein the waste gas leaching towers have the gas flow of 20000m3The fermentation and drying waste gas treatment method has the advantages that the fermentation and drying waste gas treatment method has a normal operation mode, a waste water storage mode and a waste water adding mode. The invention provides a composition mode, an operation parameter, a normal operation mode, a storage mode and an addition mode of waste water of a waste gas leaching tower; the waste gas leaching tower is required to have more than two stages of absorption, scientific management is needed in different production stages, efficient utilization of new water is ensured, and less waste water is generated; of waste waterThe storage and sterilization facilities are integrated, so that multiple functions of simple storage, centralized discharging and sterilization long-term storage are realized; the addition of the waste water can be flexibly adjusted according to the production; the monitoring of the fermentation index quality of the wastewater realizes the whole production process; the recycling mode of the wastewater of the leaching tower well solves the problem of treatment of the fermentation wastewater of the feeding yeast, and realizes the purposes of changing waste into valuable and clean production.
Description
Technical Field
The invention relates to the technical field of fermentation, in particular to a method for recycling waste water of a yeast fermentation leaching tower.
Background
Industrial fermentation usually produces large amounts of waste water, and fermentation of feed yeast cultures is no exception. The fermentation waste water of the feeding yeast culture is mainly generated by an exhaust gas leaching tower. The production process of the feed yeast culture mainly comprises the following steps: seed culture, yeast liquid fermentation, carrier adsorption, drying, crushing and packaging. The waste culture and fermentation gas, the dry waste gas and the like generated in the flow points are all introduced into a waste gas elution tower for washing, the washed gas is then discharged into the atmosphere through photolysis, and the waste water generated by elution has low flow rate, but the gas contains dry fine powder and other organic matters and has high COD (chemical oxygen demand), so that the treatment of the waste water is very important for clean and sustainable production.
Therefore, the technical personnel in the field need to solve the problem of how to provide a method for recycling the wastewater of the leaching tower, which solves the problem of wastewater treatment of the feeding yeast culture so as to realize clean production and reduce the influence on the environment.
Disclosure of Invention
In view of the above, the invention provides a method for recycling waste water of a yeast fermentation leaching tower, aiming at solving the technical problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for recycling waste water of a yeast fermentation leaching tower is used for at least two stages of waste gas leaching towers, and the waste gas leaching towers have the gas flow rate of 20000m3The fermentation and drying waste gas treatment comprises:
and (3) a normal operation mode: the addition amount of new water injected into the waste gas leaching tower is the same as the recovery amount of waste water recovered by the waste water recovery tank, and the waste water recovery tank is opened to circulate cooling water to control the temperature of the waste water; all the wastewater in the wastewater recovery tank is uniformly injected into the plurality of fermentation tanks every day;
a waste water storage mode: stopping circulating cooling water and fresh water of the waste gas leaching tower when the yeast fermentation system stops for more than 24 hours, completely discharging the waste water of the waste gas leaching tower into a waste water recovery tank, starting steam heating and sterilizing operation, and introducing sterile air for pressurized storage;
wastewater addition mode: when the vehicle is driven again after stopping for more than 24 hours, injecting the wastewater in the wastewater recovery tank into the fermentation tank in a plurality of times, and keeping introducing sterile air for pressurized storage until the wastewater is exhausted; and returning to the normal operation mode after the waste water is exhausted.
Through the technical scheme, the invention provides a composition mode, an operation parameter, a normal operation mode, a storage mode and an addition mode of waste water of the waste gas leaching tower; the waste gas leaching tower is required to have more than two stages of absorption, scientific management is needed in different production stages, efficient utilization of new water is ensured, and less waste water is generated; the waste water storage and sterilization facilities are integrated, so that multiple functions of simple storage, centralized discharging and sterilization long-term storage are realized; the addition of the waste water can be flexibly adjusted according to the production; the monitoring of the fermentation index quality of the wastewater realizes the whole production process; the recycling mode of the wastewater of the leaching tower well solves the problem of treatment of the fermentation wastewater of the feeding yeast, and realizes the purposes of changing waste into valuable and clean production.
Preferably, in the method for recycling the wastewater of the yeast fermentation leaching tower, the addition amount of fresh water and the recovery amount of wastewater are both 200kg/h in a normal operation mode. Can satisfy 20000m3The treatment requirement of fermentation and drying waste gas is satisfied.
Preferably, in the method for recycling the wastewater of the yeast fermentation leaching tower, the temperature of the wastewater is controlled to be 40 ℃ by circulating cooling water in a normal operation mode. Can meet the use requirement of the waste water.
Preferably, in the method for recycling the waste water of the yeast fermentation leaching tower, the waste water is recycledIn normal operation mode, the number of the running wheels is 2 and 30m per day3Respectively injecting waste water into the fermentation tank once, and adding 5m of waste water3The waste water is divided into 2 fermentation tanks, and the fermentation conditions of the fermentation tanks and the following working procedures are unchanged.
Preferably, in the method for recycling the wastewater of the yeast fermentation leaching tower, before the wastewater is injected into the wastewater recycling tank, a sample is taken to perform physical observation, microscopic examination or simulated fermentation test on the wastewater. Under the normal operation mode, the waste water recovery tank does not need to start steam heating sterilization operation and does not need to be filled with sterile air for pressurization storage. But note that: before the wastewater is conveyed to a fermentation tank and recycled, the wastewater is sampled to be physically observed and subjected to microscopic examination if necessary so as to prevent the wastewater from deteriorating and avoid the generation of excessive bacteria. Normally when production (also including the device drive), still once every week, to waste water sample, the waste water proportion that the simulation fermentation cylinder added carries out the fermentation test in little fermentation cylinder (30L) in the laboratory to ensure that waste water recovery can not cause the influence to fermentation production.
Preferably, in the above method for recycling waste water from a yeast fermentation leaching tower, the steam heating sterilization operation comprises: starting steam, raising the temperature in the wastewater recovery tank to 120 ℃, keeping the temperature for 15 minutes, and stopping steam heating; the circulating cooling water was started and the wastewater was cooled to 95 ℃. Can meet the sterilization requirement.
Preferably, in the method for recycling the wastewater of the yeast fermentation leaching tower, when the wastewater storage mode is adopted, sterile air is introduced into the wastewater recovery tank, the pressure of the sterile air is kept at 0.015MPa, and then the circulation of cooling water is stopped until the vehicle is driven again, so that the positive pressure state is always kept. Can meet the sterilization requirement.
Preferably, in the method for recycling the waste water of the yeast fermentation leaching tower, the waste water stored in the waste water storage mode is stored for no more than 25 days. Can meet the use requirement of wastewater recycling.
Preferably, in the method for recycling the wastewater of the yeast fermentation leaching tower, the addition amount of the wastewater to the fermentation tank is less than 15% of the total water addition amount of a single fermentation tank in the wastewater addition mode. When driving again, care was taken to increase the amount of wastewater added to the fermentor to digest the shutdown wastewater.
Preferably, in the method for recycling the waste water of the yeast fermentation leaching tower, when the vehicle is stopped for more than 24 hours and then is started again, no new water is injected into the waste gas leaching tower in the first day, and no waste water is discharged; after 24 hours, the addition amount of fresh water and the recovery amount of waste water are 100 kg/h; after 48 hours, the amount of fresh water added and the amount of recovered waste water were returned to 200 kg/h. When the vehicle is driven again after stopping for more than 24 hours, no new water is added in the first day and no waste water is generated because all the fresh water is in the circulating water tank.
According to the technical scheme, compared with the prior art, the invention discloses a method for recycling the waste water of the yeast fermentation leaching tower, and provides a composition mode, an operation parameter, a normal operation mode, a storage mode and an addition mode of the waste water of the waste gas leaching tower; the waste gas leaching tower is required to have more than two stages of absorption, scientific management is needed in different production stages, efficient utilization of new water is ensured, and less waste water is generated; the waste water storage and sterilization facilities are integrated, so that multiple functions of simple storage, centralized discharging and sterilization long-term storage are realized; the addition of the waste water can be flexibly adjusted according to the production; the monitoring of the fermentation index quality of the wastewater realizes the whole production process; the recycling mode of the wastewater of the leaching tower well solves the problem of treatment of the fermentation wastewater of the feeding yeast, and realizes the purposes of changing waste into valuable and clean production.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a diagram showing the generation and recovery of wastewater from a yeast fermentation leaching tower provided by the invention;
FIG. 2 is a diagram of a waste water storage system of a yeast fermentation leaching tower provided by the invention.
Wherein:
1-a waste gas leaching tower;
2-waste water recovery tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a method for recycling waste water of a yeast fermentation leaching tower, which is used for at least two stages of waste gas leaching towers 1, wherein the waste gas leaching tower 1 aims at the gas flow of 20000m3The fermentation and drying waste gas treatment comprises:
and (3) a normal operation mode: the addition amount of the new water injected into the waste gas leaching tower 1 is the same as the recovery amount of the waste water recovered by the waste water recovery tank 2, and the waste water recovery tank 2 is opened to circulate cooling water to control the temperature of the waste water; all the wastewater in the wastewater recovery tank 2 is equally injected into the plurality of fermentation tanks every day;
a waste water storage mode: stopping circulating cooling water and fresh water of the waste gas leaching tower 1 when the yeast fermentation system stops for more than 24 hours, completely discharging the waste water of the waste gas leaching tower 1 into a waste water recovery tank 2, starting steam heating and sterilizing operation, and introducing sterile air for pressurization and storage;
wastewater addition mode: when the vehicle is driven again after stopping for more than 24 hours, injecting the wastewater in the wastewater recovery tank 2 into the fermentation tank for several times, and keeping introducing sterile air for pressurized storage until the wastewater is exhausted; and returning to the normal operation mode after the waste water is exhausted.
In order to further optimize the technical scheme, the addition amount of fresh water and the recovery amount of waste water are both 200kg/h in a normal operation mode.
In order to further optimize the technical scheme, the temperature of the wastewater is controlled to be 40 ℃ by circulating cooling water in a normal operation mode.
In order to further optimize the technical scheme, the number of the working chambers is 2 and 30m per day in the normal operation mode3Respectively injecting waste water into the fermentation tank once, and adding 5m of waste water3The wastewater is divided into 2 fermentation tanks.
In order to further optimize the technical scheme, before the wastewater is injected into the wastewater recovery tank, a sample is taken to carry out physical observation, microscopic examination or simulated fermentation test on the wastewater.
In order to further optimize the above technical solution, the steam heating sterilization operation in the wastewater storage mode includes: starting steam, raising the temperature in the wastewater recovery tank 2 to 120 ℃, keeping the temperature for 15 minutes, and stopping steam heating; the circulating cooling water was started and the wastewater was cooled to 95 ℃.
In order to further optimize the technical scheme, when the waste water storage mode is adopted, sterile air is introduced into the waste water recovery tank 2, the circulating cooling water is stopped after the pressure of the waste water recovery tank is kept at 0.015MPa, and the positive pressure state is always kept until the vehicle is driven again.
In order to further optimize the technical scheme, the storage time of the waste water stored in the waste water storage mode is not more than 25 days.
In order to further optimize the technical scheme, the addition amount of the wastewater to the fermentation tank is less than 15% of the total water addition amount of a single fermentation tank in the wastewater addition mode.
In order to further optimize the technical scheme, when the vehicle is driven again after stopping for more than 24 hours, no new water is injected into the waste gas leaching tower 1 for the first day, and no waste water is discharged; after 24 hours, the addition amount of fresh water and the recovery amount of waste water are 100 kg/h; after 48 hours, the amount of fresh water added and the amount of recovered waste water were returned to 200 kg/h.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for recycling waste water of a yeast fermentation leaching tower is characterized by being used for at least two stages of waste gas leaching towers, wherein the gas flow rate of each waste gas leaching tower is 20000m3The fermentation and drying waste gas treatment comprises:
and (3) a normal operation mode: the addition amount of new water injected into the waste gas leaching tower is the same as the recovery amount of waste water recovered by the waste water recovery tank, and the waste water recovery tank is opened to circulate cooling water to control the temperature of the waste water; all the wastewater in the wastewater recovery tank is uniformly injected into the plurality of fermentation tanks every day;
a waste water storage mode: stopping circulating cooling water and fresh water of the waste gas leaching tower when the yeast fermentation system stops for more than 24 hours, completely discharging the waste water of the waste gas leaching tower into a waste water recovery tank, starting steam heating and sterilizing operation, and introducing sterile air for pressurized storage;
wastewater addition mode: when the vehicle is driven again after stopping for more than 24 hours, injecting the wastewater in the wastewater recovery tank into the fermentation tank in a plurality of times, and keeping introducing sterile air for pressurized storage until the wastewater is exhausted; and returning to the normal operation mode after the waste water is exhausted.
2. The method for recycling the wastewater of the yeast fermentation leaching tower according to claim 1, wherein the fresh water addition amount and the wastewater recovery amount are both 200kg/h in the normal operation mode.
3. The method for recycling the wastewater of the yeast fermentation leaching tower according to claim 2, wherein the temperature of the wastewater is controlled to be 40 ℃ by circulating cooling water in a normal operation mode.
4. The method for recycling waste water of a yeast fermentation leaching tower according to claim 2 or 3, wherein the waste water is discharged to 2 and 30 m/day in normal operation mode3Respectively injecting waste water into the fermentation tank once, and adding 5m of waste water3The wastewater is divided into 2 fermentation tanks.
5. The method for recycling wastewater from a yeast fermentation leaching tower according to any one of claims 1 to 3, wherein a sample is taken for physical observation, microscopic examination, or simulated fermentation test of the wastewater before the wastewater is injected into the wastewater recovery tank.
6. The method for recycling the wastewater of the yeast fermentation leaching tower according to claim 1, wherein the steam heating sterilization operation in the wastewater storage mode comprises: starting steam, raising the temperature in the wastewater recovery tank to 120 ℃, keeping the temperature for 15 minutes, and stopping steam heating; the circulating cooling water was started and the wastewater was cooled to 95 ℃.
7. The method for recycling the wastewater of the yeast fermentation leaching tower according to claim 6, wherein in the wastewater storage mode, sterile air is introduced into the wastewater recovery tank, the pressure of the sterile air is kept at 0.015MPa, and then the circulation of cooling water is stopped until the wastewater is driven again and the positive pressure state is always kept.
8. The method for recycling the wastewater of the yeast fermentation leaching tower according to claim 7, wherein the wastewater stored in the wastewater storage mode is stored for no more than 25 days.
9. The method for recycling wastewater from a yeast fermentation leaching tower according to claim 1, wherein in the wastewater addition mode, the addition amount of wastewater to a fermentation tank is less than 15% of the total water addition amount of a single fermentation tank.
10. The method for recycling the wastewater of the yeast fermentation leaching tower according to claim 1, wherein when the vehicle is driven again after the vehicle is stopped for more than 24 hours, no new water is injected into the waste gas leaching tower in the first day, and no wastewater is discharged; after 24 hours, the addition amount of fresh water and the recovery amount of waste water are 100 kg/h; after 48 hours, the amount of fresh water added and the amount of recovered waste water were returned to 200 kg/h.
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2019
- 2019-12-27 CN CN201911376529.2A patent/CN111036035A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101579595A (en) * | 2009-03-30 | 2009-11-18 | 宝鸡阜丰生物科技有限公司 | Novel process for treating fermented waste gas of amino acid by utilizing spray cooling method |
| KR20130023482A (en) * | 2011-08-29 | 2013-03-08 | 한국전력공사 | Method and apparatus of solvent scrubbing carbon dioxide capture system with enhanced absorption capacities |
| CN202558657U (en) * | 2012-04-17 | 2012-11-28 | 大英九合生物化工股份有限公司 | Waste water recycle device in antibiotic fermentation system |
| CN205903761U (en) * | 2016-07-09 | 2017-01-25 | 河北源清环保科技有限公司 | Acetic acid fermentation exhaust gas collection device |
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| CN106693639A (en) * | 2017-01-03 | 2017-05-24 | 北京首钢朗泽新能源科技有限公司 | Treatment method and system for waste gas and waste liquid in bio-fermentation production of fuel ethanol |
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Application publication date: 20200421 |
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