A kind of separation and utilization process of threonine waste mother liquor

Abstract

The invention belongs to the technical field of threonine mother liquor treatment, and discloses a process for separating and using threonine waste mother liquor, which includes the following steps: 1) filtering and adjusting pH, 2) adding agricultural waste, and 3) microbial treatment. The process of the invention can effectively treat the pollutants in the waste mother liquor, and at the same time prepare the feed bacteria and algae protein, save energy and reduce emissions, and simultaneously improve the economic benefits of the enterprise.

Description

technical field [0001] The invention belongs to the technical field of threonine mother liquor treatment, and in particular relates to a process for separating and using threonine waste mother liquor. Background technique [0002] L-threonine is an essential amino acid that constitutes human, animal and plant proteins, and is mainly used in medicine, chemical reagents, food fortifiers, feed additives, etc. According to relevant statistics, the world threonine production was only 4,000 tons in 1993, increased to 25,000 tons in 1999, exceeded 40,000 tons in 2002, and exceeded 200,000 tons in 2015. The rapid development of threonine reflects its importance in the field of amino acid fermentation. [0003] At present, there are three main production methods of threonine: fermentation method, protein hydrolysis method and chemical synthesis method, among which microbial fermentation method has become the mainstream method for threonine production. The production of threonine by...

AI Technical Summary

Problems solved by technology

However, at present, there is no mature complete set of technology applied to production practice at home and abroad.

The main problem is that the one-time investment is too large, or the daily operation cost is too high, most manufacturers cannot bear it, and have to maintain the status quo of excessive emissions for a long time

[0004] The applicant's previous research mainly includes two aspects: 1. The use of waste water as fertilizer preparation is suitable for enterprises with fertilizer production qualifications and capabilities, but for other amino acid production enterprises, the purpose of fertilizer production cannot be achieved; 2. The use of waste water The treatment system purifies it; the heating and concentration process can obtain feed products and remove pollutants at the same time, but the cost is high, time-consuming and laborious, resource recovery is out of touch with wastewater treatment, and there are disadvantages such as easy deterioration of organic matter after high-temperature evaporation and concentration

Studies in the prior art have also shown that amino acid industrial wastewater can be used to produce feed bacterial protein. For example, the Chinese patented technology "Using High Salt Amino Acid Wastewater Fermentation to Produce Feed Debariae hansenii" discloses a method for recycling amino acids A method for fermenting waste water to produce bacterial protein. The method uses waste water to prepare a culture medium. The culture medium is composed of high-salt amino acid sewage: 125g / L-330g / L, carbon source: 30-100g / L, diphosphate Potassium Hydrogen (KH 2 PO 4 ): 5-15g / L, yeast powder: 0-10g / L, magnesium sulfate (MgSO 4 ): 3-9g / L, calcium carbonate (CaCO 3 ): 0.75-2g / L, ferrous sulfate (FeSO 4 ): 1.5-4g / L, and the pH of the medium is 3.5-7.5. This method effectively treats wastewater and prepares bacterial protein; however, this method also has some defects: the cost of medium raw materials is high, and the use of waste mother liquor is limited. and other defects

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