Method for treating pH of nisin wastewater

Abstract

The invention discloses a method for treating the pH of nisin wastewater, which comprises the steps of treating nisin wastewater with a fermentation method, applying Paecilomyces variotii to the treatment of nisin wastewater, cultivating it in the stock solution of nisin wastewater to maintain its vitality, aeration and stirring for 7~ In 9 days, the pH of the nisin wastewater can be neutralized and the COD can be reduced by 60% to 90%. The method for treating the pH of nisin wastewater obtained by the present invention only adds bacteria species and does not add other substances, and is very economical; moreover, the method is simple and easy to handle on a large scale.

Description

technical field [0001] The invention relates to the field of biotechnology, in particular to a method for treating the pH of nisin wastewater. Background technique [0002] Nisin is a natural biologically active antimicrobial peptide of nisin. It is a small molecular peptide with strong bactericidal effect. It is synthesized and secreted by the microorganisms of the genus Lactococcus in the metabolic process. It is a safe, Highly effective, purely natural active substances. At present, the annual output of Nisin in my country has exceeded 250 tons, but with the production of Nisin, a large amount of fermentation waste liquid will also be produced, so the annual discharge of more than 50,000 tons of waste liquid in my country is produced by Nisin. After the production of Streptococcus lactis, the remaining waste after extracting Nisin is Nisin fermentation wastewater, which has the characteristics of low C / N, high chloride ion concentration, low pH, and high COD. As waste li...

AI Technical Summary

Problems solved by technology

Now a lot of waste water is treated by biochemical method. The core of molasses wastewater treatment is biochemical method. In the 1970s, acrylic fiber wastewater was treated by biochemical method. In the treatment of coking wastewater, most domestic coking enterprises adopt biochemical method, but biochemical method The methods for treating nisin wastewater are still in the laboratory stage, and there is no feasible factory plan. The main reason is that the pH of nisin wastewater is too low, and many bacteria do not grow or grow too slowly. Therefore, how to use bacteria to remove pollutants from wastewater The method of rapid degradation of COD is particularly important