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A kind of technology that adopts nisin waste water to produce calcium lactate

The technology of nisin and streptococcus salt is applied in the field of nisin fermentation waste liquid recycling and utilization, which can solve the problems of waste of fermentation liquid resources, environmental pollution and the like, and achieves alleviation of environmental protection pressure, production cost reduction and high economic efficiency. effect of benefit

Active Publication Date: 2018-10-26
HEBEI SHENGXUE DACHENG PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem in the prior art that the discharge of fermentation waste liquid after nisin fermentation will not only cause environmental pollution, but also cause waste of resources due to the discharge of fermentation liquid, the present invention provides a method for producing calcium lactate using nisin waste water. craft

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of technology that adopts nisin waste water to produce calcium lactate uses nisin salting-out waste water as raw material, comprising the following steps:

[0026] A. Pretreatment of nisin salting-out wastewater: vacuum evaporation and concentration of nisin salting-out wastewater at a vacuum degree of 0.07MPa and a concentration temperature of 65°C to make nisin salting-out wastewater contain inorganic salts Crystallization is carried out to obtain a pretreatment liquid; in this process step A, the salting-out waste liquid is first concentrated and filtered, and the purpose is to remove most of the salts in the salting-out waste liquid.

[0027] B. Calcium salt precipitation: Dilute the pretreatment solution obtained in step A with water to the same volume as the nisin salting-out wastewater before concentration, add milk of lime for alkalization, adjust the pH to 9.5, then heat to 90°C, Insulate at ℃ for 4 hours to form a precipitate; step B adjust the pH to 9....

Embodiment 2

[0031] A kind of technology that adopts nisin waste water to produce calcium lactate uses nisin salting-out waste water as raw material, comprising the following steps:

[0032] A. Pretreatment of nisin salting-out wastewater: vacuum evaporation and concentration of nisin salting-out wastewater at a vacuum degree of 0.08MPa and a concentration temperature of 69°C to make nisin salting-out wastewater contain inorganic salts Crystallization, to obtain a pretreatment solution;

[0033] B. Calcium salt precipitation: Dilute the pretreatment solution obtained in step A with water to the same volume as the nisin salting-out wastewater before concentration, add milk of lime for alkalization, adjust the pH to 10, then heat to 100°C, Keep the temperature at ℃ for 5 hours to form a precipitate;

[0034] C. Preparation of calcium lactate: filter the precipitate obtained in step B through a plate frame, decolorize the filtrate through activated carbon, decolorize at a temperature of 50°C...

Embodiment 3

[0037] A kind of technology that adopts nisin waste water to produce calcium lactate uses nisin salting-out waste water as raw material, comprising the following steps:

[0038] A. Pretreatment of nisin salting-out wastewater: vacuum evaporation and concentration of nisin salting-out wastewater at a vacuum degree of 0.09MPa and a concentration temperature of 67°C to make nisin salting-out wastewater contain inorganic salts Crystallization, to obtain a pretreatment solution;

[0039] B. Calcium salt precipitation: Dilute the pretreatment solution obtained in step A with water to the same volume as the nisin salting-out wastewater before concentration, add milk of lime for alkalization, adjust the pH to 9.9, then heat to 95 ° C, at 55 Keep warm at ℃ for 4.5h to form a precipitate;

[0040] C. Preparation of calcium lactate: filter the precipitate obtained in step B through a plate frame, decolorize the filtrate through activated carbon, decolorize at a temperature of 44°C, and ta...

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Abstract

The invention provides a process for producing calcium lactate by adopting nisin wastewater and belongs to the technical field of recycling of nisin fermented waste liquor. The process adopts nisin salting-out wastewater as a raw material and comprises the following steps: (A) pretreating the nisin salting-out wastewater; (B) carrying out calcium salt precipitation; and (C) preparing calcium lactate. According to the lactic acid recovery process provided by the invention, a large amount of calcium lactate can be coproduced, the salting-out wastewater can be treated, and the operation is simple; the whole process has no need of using an organic solvent, cannot cause injury to physical health of operating personnel and cannot cause pollution to environments, so that the environmental protection pressure of production enterprises can be alleviated; and meanwhile, the production cost can be reduced, and relatively high economic benefit is brought, so that the process is applicable to popularization and application.

Description

technical field [0001] The invention belongs to the technical field of recycling nisin fermentation waste liquid and relates to a process for producing calcium lactate by adopting nisin waste water. The process is simple in operation, green and environment-friendly, recycles nisin fermentation waste liquid, is environmentally friendly and energy-saving, and the added value of the recovered calcium lactate is high. Background technique [0002] Nisin, the English name Nisin, is a polypeptide substance produced by fermentation of Streptococcus lactis, containing 34 amino acid residues. Nisin is a natural food antibacterial agent and antistaling agent. It has inhibitory effects on many Gram-positive bacteria such as Staphylococcus, Streptococcus, and Lactobacillus. It also strongly inhibits spores of most Clostridium and Bacillus species. In addition, recent studies have found that some Gram-negative species that are not sensitive to Nisin, including Salmonella, Escherichia c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C51/41C07C59/08C02F9/10C02F101/34C02F103/34
CPCC02F1/04C02F1/52C02F9/00C02F2001/5218C02F2101/34C02F2103/343C02F2301/08C07C51/412C07C59/08
Inventor 宋志倩
Owner HEBEI SHENGXUE DACHENG PHARMA