Method for preparing microorganism flocculant

Abstract

The invention relates to a method for preparing a microbial flocculant which is characterized by: preparing the microbial flocculant through the steps of the preparation of liquid medium, the fermentation culture of the strain, the preparation of the flocculant crude product and flocculant refined product using the delftia acidovorans as the stain resource for preparing the microbial flocculant. The mehtod finds the delftia acidovorans capable of generating the microbial flocculant with a stable flocculability and a good flocculating effect for the first time in China. The screened flocculanthas advantages of high flocculating activity, few dosage, short fermentation time, simple extraction technology, which greatly reduces the production cost. The method for preparing the flocculant is simple and easy to apply. The experiment of wastewater treatment shows that the flocculating effect is ideal after using the flocculant.

Description

technical field

[0001] The invention belongs to the field of microbial science, in particular to a method for preparing microbial flocculants. Background technique

[0002] Flocculation technology is an important measure widely used in water supply, wastewater treatment, sludge dewatering and other treatment processes. The key to the flocculation effect depends on the choice of flocculant. For a long time, there are two main types of flocculants used in water supply and wastewater treatment: inorganic flocculants represented by aluminum salts, iron salts and their hydrolyzed polymers, and organic polymer flocculants represented by polyacrylamide and its derivatives. agent. Although inorganic and organic flocculants are widely used because of their good flocculation effect and low cost, people have to pay attention to the secondary pollution they cause to the environment during use. Studies have shown that aluminum ions in inorganic flocculants can easily cause Alzheimer's ...