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Sewage treatment and recovery and reuse method in lysine production

A sewage treatment and lysine technology, applied in the field of bioengineering, can solve the problems of difficulty in treatment, high economic risk, high ammonia nitrogen content, high CODCr content, etc., and achieve the effect of saving sewage treatment costs and equipment investment costs, and saving water resources

Inactive Publication Date: 2006-12-20
SHANDONG XIWANG SUGAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Water is one of the main resources for human survival. Wastewater treatment and recycling are the primary issues in current industrial production projects. In the process of producing lysine by fermentation, in addition to a large amount of water in the fermentation broth, lysine The ion exchange extraction, elution and refining process all produce a large amount of waste water. One ton of lysine may produce more than 20 tons of waste water. If it is not treated and recycled, it will be a great loss of value.
Due to COD in wastewater Cr The content of ammonia nitrogen is high, and the general sewage treatment method cannot solve the problem. The difficulty of treatment and the resulting economic risks are great

Method used

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Embodiment Construction

[0014] First use sulfuric acid to adjust the pH of the wastewater in the storage tank before concentration to about 3.5, and then input the wastewater into the four-effect evaporator to adjust and control the concentration rate and the COD of each effect outlet water Cr value, so that the COD of an effective outlet water Cr It is about 80, of which the condensed water recovered in the first effect is used as the ingredient water of the fermentation medium, the condensed water recovered in the second, third and fourth effects is used as refined elution water, and the ammonium sulfate crystallized in the concentrated solution is purified and refined by recrystallization , used as an inorganic nitrogen source in the medium, and the remaining concentrated mother liquor is used for processing compound fertilizers.

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Abstract

The invention refers to a method of the treatment and recycle of wastewater in the production of lysine, the characters of which includes the extraction and elution of lysine, the evaporation and concentration of wastewater during refining, the control of CODCr value below 500 through adjusting the PH value of wastewater in tank before concentration; the wastewater is recycled according to the different water quality discharged from different efficiency of evaporator, the concentrate liquid of which is produced for composite fertilizer after fractional crystallization and separation of ammonia sulfate.

Description

Technical field: [0001] The invention belongs to the field of bioengineering and relates to a lysine production method, in particular to a sewage treatment and recycling method in lysine production. technical background: [0002] Lysine is one of the eight essential amino acids necessary for the human body. Lysine and threonine are the most important amino acids in animal nutrition, because other amino acids can generally be replaced by analogs or small optical isomers with X-keto or hydroxyl groups. But lysine is the only one among the eight amino acids that can be effectively utilized only in the L-form. Since lysine cannot be produced by reductive amination or transamination in the human body, it must be ingested from food, so it is one of the most important basic amino acids. [0003] In recent years, the feed industry and food industry at home and abroad have developed rapidly, and new uses of lysine in the pharmaceutical industry have been continuously discovered. Ly...

Claims

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Application Information

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IPC IPC(8): C02F1/04C02F1/66C02F1/58C05F1/00
CPCY02A40/20
Inventor 王勇王亮李伟王岩
Owner SHANDONG XIWANG SUGAR