CN113372234A - Purification process of monosodium glutamate fermentation wastewater - Google Patents

Purification process of monosodium glutamate fermentation wastewater Download PDF

Info

Publication number
CN113372234A
CN113372234A CN202110697964.6A CN202110697964A CN113372234A CN 113372234 A CN113372234 A CN 113372234A CN 202110697964 A CN202110697964 A CN 202110697964A CN 113372234 A CN113372234 A CN 113372234A
Authority
CN
China
Prior art keywords
glutamic acid
mother liquor
tank
crystals
liquor
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.)
Pending
Application number
CN202110697964.6A
Other languages
Chinese (zh)
Inventor
陈晓妮
刘成才
王文强
周敬
杜鹏
毛松举
刘路
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Inner Mongolia Fufeng Biotechnologies Co ltd
Original Assignee
Inner Mongolia Fufeng Biotechnologies Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Inner Mongolia Fufeng Biotechnologies Co ltd filed Critical Inner Mongolia Fufeng Biotechnologies Co ltd
Priority to CN202110697964.6A priority Critical patent/CN113372234A/en
Publication of CN113372234A publication Critical patent/CN113372234A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C227/00—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton
    • C07C227/38—Separation; Purification; Stabilisation; Use of additives
    • C07C227/40—Separation; Purification
    • 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
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C227/00—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton
    • C07C227/38—Separation; Purification; Stabilisation; Use of additives
    • C07C227/40—Separation; Purification
    • C07C227/42—Crystallisation
    • 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
    • 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
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
    • 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
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • 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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F2001/5218—Crystallization
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/34—Organic compounds containing oxygen
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/38—Organic compounds containing nitrogen
    • 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
    • C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
    • C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/11—Turbidity
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • 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

Abstract

The invention belongs to the technical field of monosodium glutamate preparation, and discloses a purification process of monosodium glutamate fermentation wastewater, which comprises the following steps: separating glutamic acid fermentation liquor, concentrating, crystallizing, collecting crystals, collecting primary mother liquor, treating the primary mother liquor to obtain secondary mother liquor, purifying the secondary mother liquor, dissolving the crystals, adsorbing by resin, performing secondary crystallization, drying and packaging.

Description

Purification process of monosodium glutamate fermentation wastewater
Technical Field
The invention relates to the technical field of biological environmental protection, in particular to a purification process of monosodium glutamate fermentation wastewater.
Background
Monosodium glutamate, known as sodium glutamate, and chemical name of monosodium alpha-aminoglutarate, is a salt formed by sodium ions and glutamate ions, wherein glutamic acid is an amino acid, and sodium is a metal element. The main ingredient of monosodium glutamate which is a seasoning commonly used in life is sodium glutamate. The monosodium glutamate is a common flavoring agent in daily life, can increase the delicate flavor of food, and is beneficial to improving the digestibility of human bodies to the food. In addition, sodium glutamate has very important functions and is widely applied to the fields of food, medicine, industry, agriculture and the like.
The mother liquor discharged after the glutamic acid is extracted from the monosodium glutamate fermentation liquor by isoelectric extraction has the characteristics of high CODCr, high BOD5, high thallus content, high sulfate radical (chloride ion before the pH is adjusted by sulfuric acid), high ammonia nitrogen content and low pH value (1.5-3.2) 'five high one low'. Is industrial waste water with great treatment difficulty. As the monosodium glutamate wastewater cannot be effectively treated, and a plurality of monosodium glutamate plants are listed in national heavy pollution source units, the treatment of the monosodium glutamate wastewater becomes a great problem which restricts the development of monosodium glutamate production enterprises.
It is reported that about 10-15 tons of mother liquor after glutamic acid extraction is discharged per 1 ton of monosodium glutamate, and 1000 ten thousand tons of high-concentration organic wastewater is discharged every year in China. Not only seriously pollutes the natural environment, but also restricts the development of the monosodium glutamate industry. Although the gourmet powder production enterprises, scientific research institutions and related colleges and universities have carried out a great deal of research on treatment. However, no mature complete technology is applied to production practice at home and abroad at present. The main problems are that the one-time investment is too large, or the daily operating cost is too high, most monosodium glutamate plants cannot bear the high-cost, and the current situation of excessive discharge has to be maintained for a long time.
Therefore, the research on the purification process of the monosodium glutamate fermentation wastewater to reduce wastewater pollution and change waste into valuable is a technical problem which needs to be solved urgently in the field.
Disclosure of Invention
In order to solve the technical problems, the invention provides a purification process of monosodium glutamate fermentation wastewater, which can improve the quality of monosodium glutamate, ensure the purity of finished monosodium glutamate and purify the fermentation wastewater.
The invention is realized by the following technical scheme:
the purification process of the monosodium glutamate fermentation wastewater comprises the following steps:
separating glutamic acid fermentation liquor, concentrating, crystallizing, collecting crystals, collecting primary mother liquor, treating the primary mother liquor to obtain secondary mother liquor, purifying the secondary mother liquor, dissolving the crystals, adsorbing by resin, performing secondary crystallization, drying and packaging.
Further, the purification process comprises the following steps: performing ultrafiltration separation on glutamic acid fermentation liquor to obtain thallus paste and glutamic acid clear liquor, and then concentrating the glutamic acid clear liquor to obtain concentrated solution, wherein the concentration temperature is 65-80 ℃, and the volume of the concentrated solution is one half to one fifth of that of the glutamic acid clear liquor; adding glutamic acid crystals which account for one fifth of the volume of the isoelectric tank as seed crystals into the isoelectric tank, then feeding the concentrated solution into the isoelectric tank, and simultaneously adding concentrated sulfuric acid to adjust the pH of the solution in the isoelectric tank to 3.0-3.3; when the liquid level in the electric tank reaches 90% of the tank volume, cooling to 45-55 ℃, and separating glutamic acid crystals and primary mother liquor; neutralizing the primary mother liquor with liquid ammonia, evaporating, concentrating and crystallizing to obtain ammonium sulfate and secondary mother liquor; the secondary mother liquor sequentially enters a sedimentation tank and a biological reaction tank and is discharged after reaching the standard;
adding purified water into glutamic acid crystals for dissolving, pumping into a resin column, and collecting feed liquid at the lower end of the resin column; pumping the solution into a crystallizing tank for secondary crystallization, and centrifuging the crystallized feed liquid by using a flat centrifuge; drying the separated crystals by using a vibrating fluidized bed, wherein the air inlet temperature is 65 ℃, and packaging the dried monosodium glutamate finished product.
Preferably, the resin column is macroporous strong base styrene anion resin with the loading of 1m32m of feed flow3/h。
Preferably, the centrifugation speed is 3200rpm and the centrifugation time is 5 min.
Preferably, the inlet air temperature for drying the vibrated fluidized bed is 60-85 ℃.
Compared with the prior art, the technology of the invention adopting the process has the advantages that:
the invention adopts resin to filter and decolor, effectively removes pigment and impurities, and improves the indexes of the feed liquid such as light transmission, chromaticity, turbidity and the like.
The process of the invention can mainly increase the efficiency of monosodium glutamate crystallization, reduce labor cost, simplify the process, omit the carbon tank-plate frame process, improve the quality of monosodium glutamate and reduce the subsequent production of mother liquor.
The method is simple and feasible, easy to operate, environment-friendly and pollution-free, and has good popularization.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the present invention will be described more clearly and completely below with reference to specific embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all 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.
Example 1
The purification process of the monosodium glutamate fermentation wastewater comprises the following steps:
performing ultrafiltration separation on glutamic acid fermentation liquor to obtain thallus paste and glutamic acid clear liquor, and then concentrating the glutamic acid clear liquor to obtain concentrated solution, wherein the concentration temperature is 70 ℃, and the volume of the concentrated solution is one half of that of the glutamic acid clear liquor; adding glutamic acid crystals accounting for one fifth of the volume of the isoelectric tank as seed crystals into the isoelectric tank, then feeding the concentrated solution into the isoelectric tank, and simultaneously adding concentrated sulfuric acid to adjust the pH of the solution in the isoelectric tank to be 3.2; when the liquid level in the electric tank reaches 90% of the tank volume, cooling to 50 ℃, and separating glutamic acid crystals and primary mother liquor; neutralizing the primary mother liquor with liquid ammonia, evaporating, concentrating and crystallizing to obtain ammonium sulfate and secondary mother liquor; the secondary mother liquor sequentially enters a sedimentation tank and a biological reaction tank and is discharged after reaching the standard;
adding purified water to glutamic acid crystal, dissolving, pumping into resin column (with loading of macroporous strongly basic styrene anion resin of 1 m)3) 2m of feed flow3Collecting the feed liquid at the lower end of the resin column, and transmitting light by 99.0%; pumping into a crystallizing tank for secondary crystallization, separating the crystallized feed liquid by a flat centrifuge, wherein the centrifugation speed is 3000rpm, and the centrifugation time is 5 min; drying the separated crystals by using a vibrating fluidized bed, wherein the air inlet temperature is 70 ℃, and packaging the dried monosodium glutamate finished product.
Example 2
The purification process of the monosodium glutamate fermentation wastewater comprises the following steps:
performing ultrafiltration separation on glutamic acid fermentation liquor to obtain thallus paste and glutamic acid clear liquor, and then concentrating the glutamic acid clear liquor to obtain concentrated solution, wherein the concentration temperature is 75 ℃, and the volume of the concentrated solution is one half of that of the glutamic acid clear liquor; adding glutamic acid crystals accounting for one fifth of the volume of the isoelectric tank as seed crystals into the isoelectric tank, then feeding the concentrated solution into the isoelectric tank, and simultaneously adding concentrated sulfuric acid to adjust the pH of the solution in the isoelectric tank to 3.1; when the liquid level in the electric tank reaches 90% of the tank volume, cooling to 45 ℃, and separating glutamic acid crystals and primary mother liquor; neutralizing the primary mother liquor with liquid ammonia, evaporating, concentrating and crystallizing to obtain ammonium sulfate and secondary mother liquor; the secondary mother liquor sequentially enters a sedimentation tank and a biological reaction tank and is discharged after reaching the standard;
adding purified water to glutamic acid crystal, dissolving, pumping into resin column (with loading of macroporous strongly basic styrene anion resin of 1 m)3) 2m of feed flow3Collecting the feed liquid at the lower end of the resin column, and transmitting light by 99.0%; then pumping into a crystallizing tank for secondary crystallization, separating the crystallized feed liquid by a flat centrifuge,the centrifugation speed is 3500rpm, and the centrifugation time is 4 min; drying the separated crystals by using a vibrating fluidized bed, wherein the air inlet temperature is 65 ℃, and packaging the dried monosodium glutamate finished product.
Example 3
The purification process of the monosodium glutamate fermentation wastewater comprises the following steps:
performing ultrafiltration separation on glutamic acid fermentation liquor to obtain thallus paste and glutamic acid clear liquor, and then concentrating the glutamic acid clear liquor to obtain concentrated liquor, wherein the concentration temperature is 80 ℃, and the volume of the concentrated liquor is one third of that of the glutamic acid clear liquor; adding glutamic acid crystals accounting for one fifth of the volume of the isoelectric tank as seed crystals into the isoelectric tank, then feeding the concentrated solution into the isoelectric tank, and simultaneously adding concentrated sulfuric acid to adjust the pH of the solution in the isoelectric tank to 3.3; when the liquid level in the electric tank reaches 90% of the tank volume, cooling to 50 ℃, and separating glutamic acid crystals and primary mother liquor; neutralizing the primary mother liquor with liquid ammonia, evaporating, concentrating and crystallizing to obtain ammonium sulfate and secondary mother liquor; the secondary mother liquor sequentially enters a sedimentation tank and a biological reaction tank and is discharged after reaching the standard;
adding purified water to glutamic acid crystal, dissolving, pumping into resin column (with loading of macroporous strongly basic styrene anion resin of 1 m)3) 2m of feed flow3Collecting the feed liquid at the lower end of the resin column, and transmitting the light by 98.0%; pumping into a crystallizing tank for secondary crystallization, separating the crystallized feed liquid by a flat centrifuge, wherein the centrifugation speed is 3200rpm, and the centrifugation time is 5 min; drying the separated crystals by using a vibrating fluidized bed, wherein the air inlet temperature is 65 ℃, and packaging the dried monosodium glutamate finished product.
The foregoing list is only illustrative of the preferred embodiments of the present invention. It is obvious that the invention is not limited to the above embodiments, but that many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.

Claims (5)

1. The purification process of the monosodium glutamate fermentation wastewater is characterized by comprising the following steps:
separating glutamic acid fermentation liquor, concentrating, crystallizing, collecting crystals, collecting primary mother liquor, treating the primary mother liquor to obtain secondary mother liquor, purifying the secondary mother liquor, dissolving the crystals, adsorbing by resin, performing secondary crystallization, drying and packaging.
2. The purification process according to claim 1, comprising the steps of: performing ultrafiltration separation on glutamic acid fermentation liquor to obtain thallus paste and glutamic acid clear liquor, and then concentrating the glutamic acid clear liquor to obtain concentrated solution, wherein the concentration temperature is 65-80 ℃, and the volume of the concentrated solution is one half to one fifth of that of the glutamic acid clear liquor; adding glutamic acid crystals which account for one fifth of the volume of the isoelectric tank as seed crystals into the isoelectric tank, then feeding the concentrated solution into the isoelectric tank, and simultaneously adding concentrated sulfuric acid to adjust the pH of the solution in the isoelectric tank to 3.0-3.3; when the liquid level in the electric tank reaches 90% of the tank volume, cooling to 45-55 ℃, and separating glutamic acid crystals and primary mother liquor; neutralizing the primary mother liquor with liquid ammonia, evaporating, concentrating and crystallizing to obtain ammonium sulfate and secondary mother liquor; the secondary mother liquor sequentially enters a sedimentation tank and a biological reaction tank and is discharged after reaching the standard;
adding purified water into glutamic acid crystals for dissolving, pumping into a resin column, and collecting feed liquid at the lower end of the resin column; pumping the solution into a crystallizing tank for secondary crystallization, and centrifuging the crystallized feed liquid by using a flat centrifuge; drying the separated crystals by using a vibrating fluidized bed, wherein the air inlet temperature is 65 ℃, and packaging the dried monosodium glutamate finished product.
3. The purification process of claim 2, wherein the resin column is macroporous strongly basic styrene anion resin with a loading of 1m32m of feed flow3/h。
4. The purification process according to claim 2, wherein the centrifugation speed is 3200rpm and the centrifugation time is 5 min.
5. The purification process of claim 2, wherein the inlet air temperature for the vibrated fluidized bed drying is 60-85 ℃.
CN202110697964.6A 2021-06-23 2021-06-23 Purification process of monosodium glutamate fermentation wastewater Pending CN113372234A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110697964.6A CN113372234A (en) 2021-06-23 2021-06-23 Purification process of monosodium glutamate fermentation wastewater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110697964.6A CN113372234A (en) 2021-06-23 2021-06-23 Purification process of monosodium glutamate fermentation wastewater

Publications (1)

Publication Number Publication Date
CN113372234A true CN113372234A (en) 2021-09-10

Family

ID=77578687

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110697964.6A Pending CN113372234A (en) 2021-06-23 2021-06-23 Purification process of monosodium glutamate fermentation wastewater

Country Status (1)

Country Link
CN (1) CN113372234A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105063160A (en) * 2015-09-19 2015-11-18 内蒙古阜丰生物科技有限公司 Environment-friendly process for preparing monosodium glutamate through concentration-isoelectric process
CN105063159A (en) * 2015-09-19 2015-11-18 内蒙古阜丰生物科技有限公司 Novel process for extracting glutamic acid through concentration-continuous isoelectric treatment
CN105087740A (en) * 2015-09-20 2015-11-25 呼伦贝尔东北阜丰生物科技有限公司 Sodium glutamate extraction process through concentrating continuous isoelectric point crystallization
CN110551040A (en) * 2018-05-31 2019-12-10 卢松 Method for refining monosodium glutamate by adopting macroporous strong base anion resin

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105063160A (en) * 2015-09-19 2015-11-18 内蒙古阜丰生物科技有限公司 Environment-friendly process for preparing monosodium glutamate through concentration-isoelectric process
CN105063159A (en) * 2015-09-19 2015-11-18 内蒙古阜丰生物科技有限公司 Novel process for extracting glutamic acid through concentration-continuous isoelectric treatment
CN105087740A (en) * 2015-09-20 2015-11-25 呼伦贝尔东北阜丰生物科技有限公司 Sodium glutamate extraction process through concentrating continuous isoelectric point crystallization
CN110551040A (en) * 2018-05-31 2019-12-10 卢松 Method for refining monosodium glutamate by adopting macroporous strong base anion resin

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
哈志瑞 等: "谷氨酸分离提取工艺进展", 《发酵科技通讯》 *

Similar Documents

Publication Publication Date Title
CN107058416B (en) Fermentation process for refining glutamic acid
CN108822163B (en) Comprehensive cyclic production method of D-glucosamine hydrochloride
CN108299278B (en) Method for extracting and separating L-tryptophan
CN107513030B (en) Method for separating and purifying L-hydroxyproline from L-hydroxyproline fermentation liquor
CN113135954B (en) Process method for preparing calcium phytate and calcium lactate by using corn soaking water
CN101654413A (en) Method for extracting and separating L-isoleucine employing three-stage film cascade
CN108997159B (en) Preparation method of L-glutamine
CN110759959B (en) Vitamin B is separated and extracted from fermentation liquor 12 Method (2)
CN111056941B (en) Method for preparing high-purity shikimic acid by utilizing ginkgo leaf extract chromatography waste liquid
CN112679560A (en) Kasugamycin crystallization process
CN113372234A (en) Purification process of monosodium glutamate fermentation wastewater
CN115772549A (en) Preparation method for extracting nicotinamide containing trace nicotinic acid from fermentation liquor
CN102442920B (en) Method for processing lysine fermentation broth
CN113735136B (en) Process method for preparing potassium salt and byproduct magnesium salt by using corn soaking water
CN113045610B (en) Method for extracting glucosamine from N-acetylglucosamine fermentation liquor
KR940000810B1 (en) Process for the preparation of crystallized glutamic acid
CN110372528B (en) Method for purifying valine
CN109438274B (en) Method for recovering glutamine from crude glutamine mother liquor
CN111186848A (en) Process and device for refining byproduct ammonium sulfate in isophthalonitrile production
CN113214103A (en) Subsequent treatment method for enzymatic synthesis of D-p-hydroxyphenylglycine
CN102020576A (en) High-purity glutamic acid and preparation method thereof
CN104177269B (en) A kind of method being separated Pidolidone and L-Glutimic acid from L-bran acid treating mother liquor
CN114031097B (en) Separation and purification technology of potassium salt extracting solution obtained by extracting potassium from corn soaking solution
CN112552164B (en) Process method for extracting malic acid from unqualified sodium citrate mother liquor
CN110787638A (en) Pentanediamine concentration system and method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20210910

RJ01 Rejection of invention patent application after publication