A method for repairing amino acid fermentation wastewater by using biochemical technology

Abstract

The invention relates to a method of repairing amino acid fermentation waste water by using a biochemical technology. The method is characterized by comprising the following steps of: allowing amino acid industrial waste water to flow through multiple grids, then discharging the industrial waste water into a sedimentation tank, adding 0.3kg adsorbent per ton of sewage into the sewage for sedimentation treatment, and then performing hydrolysis, acidification, and anaerobic biochemical treatment-biological repairing treatment, wherein the distances between the grids are gradually reduced. The method can increase water treatment capacity, improve treatment water quality, lower operating cost and promote discharge reaching standards. The method can also reduce the sludge yield, facilitates removing pollutants such as a COD (chemical oxygen demand) and ammonia nitrogen in waste liquid and has good application prospects.

Description

technical field [0001] The invention relates to the field of amino acid extraction technology in the biological fermentation industry, and specifically discloses a method for repairing amino acid fermentation wastewater by utilizing biochemical technology. Background technique [0002] In the production of amino acids, a large amount of fermentation waste liquid is discharged from the factory, causing serious pollution to the environment. The COD concentration of this kind of fermentation waste liquid is very high, generally more than tens of thousands of mg / L. Although diluted by various wastewater in the factory, the COD concentration of the mixed wastewater is also about 10,000 mg / L. The treatment technology of organic industrial wastewater has always been a hot spot and difficulty in research. It is reported that a large amount of bacteria contained in the wastewater is extracted. It is a single-cell protein, which is rich in protein. The chemical composition of the drie...

AI Technical Summary

Problems solved by technology

Activated carbon is widely used as an important adsorbent material because of its rich pore structure and huge specific surface area, good chemical stability and strong adsorption capacity, but its cost is high

There are also non-metallic ionic minerals such as attapulgite for adsorption, but natural non-metallic minerals have the following limitations as adsorbents: natural non-metallic minerals have high density and limited specific surface area, and the surface of natural non-metallic minerals is mostly negatively charged. And directly using natural non-metallic powder ore such as clay minerals as the adsorbent will have the problem of difficult separation of solid and liquid after adsorption

The applicant group company has been committed to clean amino acid production methods for many years. It once disclosed a process for effectively treating fermentation waste liquid, in which microbial agents were used to treat COD, ammonia nitrogen, and SS effectively, but there were too many strains in the agents. Too much, which increases the possibility of bacterial strain pollution. The amount of bacterial agent used is too large. It is necessary to add 0.5-1kg of physical adsorbent and 15-20g of bacterial agent per ton of sewage, and the bacterial agent is easy to deposit at the bottom of the pool, causing flocculation, thus A large amount of sludge is generated, and it is difficult to clean up