A method for solid-liquid separation of neomycin sulfate fermentation waste liquid

Abstract

A method for solid-liquid separation of neomycin sulfate fermentation wastewater comprises the first step of adding chitosan to the neomycin sulfate fermentation wastewater to obtain fermentation wastewater subjected to first flocculation; the second step of adding the dissolved polyacrylamide to the wastewater subjected to the first flocculation, and stirring to obtain wastewater subjected to second flocculation; the third step of filtering the fermentation wastewater subjected to the second flocculation and obtained in the second step to obtain a solid matter; pressing the solid matter to obtain a formed filter cake to complete the the solid-liquid separation of the neomycin sulfate fermentation wastewater. According to the method for the solid-liquid separation of the neomycin sulfate fermentation wastewater, the filtration speed can be doubled by means of the combined effect of two flocculants of the chitosan and the polyacrylamide to obtain a clean filtrate. The solid matter in the wastewater is removed efficiently, the wastewater handling difficulty is greatly reduced, and the environment protection problems existing in production of enterprises for a long time are solved.

Description

technical field [0001] The invention relates to the technical field of neomycin sulfate waste liquid treatment, in particular to a method for solid-liquid separation of neomycin sulfate fermentation waste liquid. Background technique [0002] In the process of using biological fermentation to produce neomycin, since neomycin fermentation uses a large amount of grain-based raw materials, the fermented liquid has high solid content, high viscosity, high residual nutrients such as sugar and nitrogen, and its composition is relatively complex. Especially high COD and ammonia nitrogen bring great difficulty to post-extraction and environmental protection treatment. [0003] With the country's emphasis on environmental protection, the requirements for enterprise sewage treatment and discharge are becoming more and more stringent. All waste water generated by enterprises must enter environmental protection facilities for treatment, and can only be discharged after reaching the stan...

AI Technical Summary

Problems solved by technology

However, when the anaerobic tower of the environmental protection station of a pharmaceutical company processes the fermentation waste liquid, it is required that the incoming sewage solids must be controlled below 500 mg / liter. Exceeding this standard will have a negative impact on the treatment capacity of the anaerobic tower. , thus affecting the processing capacity of the entire environmental protection system

[0004] To reduce the solid content of the fermentation waste liquid, it is necessary to filter the fermentation waste liquid, but the conventional methods of heating, adding filter aids, adding flocculants, etc., the filtration speed cannot meet the requirements of large-scale production, and often occur. difficult question