Treatment process for waste sodium citrate mother solution

Abstract

The invention relates to the field of biochemical engineering, and specially relates to a treatment process for a waste sodium citrate mother solution. The treatment process mainly comprises transforming the waste sodium citrate mother solution into ammonium citrate through processes of flocculation, centrifugal separation, adsorption, elution, and the like; and returning the obtained ammonium citrate to a fermentation process for recycling use as an organic nitrogen source. By adopting the treatment process, direct effluent of the waste sodium citrate mother solution can be prevented and pressure of environmental protection is relieved. The treatment process provides the nitrogen source for the fermentation process, turns the waste into wealth, and has considerable economic benefit and environment-friendly benefit.

Description

technical field [0001] The invention relates to the field of biochemical industry, in particular to a process for treating waste sodium citrate mother liquor. Background technique [0002] Sodium citrate is an organic acid salt widely used in food, beverage, chemical and pharmaceutical fields. At present, the production process adopted by most citric acid enterprises is the neutralization process, that is, the purified citric acid solution is directly mixed with sodium hydroxide reaction to produce sodium citrate. During the production process, waste sodium citrate mother liquor will be continuously produced. In order to avoid the continuous decline in the quality of finished products, part of the waste sodium citrate mother liquor will be discharged. In this part of the waste sodium citrate mother liquor, except for the main component of citric acid In addition to sodium, it is also rich in protein colloids and a small amount of impurities such as cellulose, organic acids...

AI Technical Summary

Problems solved by technology

During the production process, waste sodium citrate mother liquor will be continuously produced. In order to avoid the continuous decline in the quality of finished products, part of the waste sodium citrate mother liquor will be discharged. In this part of the waste sodium citrate mother liquor, except for the main component of citric acid In addition to sodium, it is also rich in protein colloids and a small amount of impurities such as cellulose, organic acids, sugars, pigments, minerals, etc., which either come from raw materials or accumulate during circulation. Difficult to deal with, most enterprises directly discharge into the environment, which not only causes product loss, but also increases the environmental load, therefore, it is urgent to find an effective way to deal with waste sodium citrate mother liquor

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