Due to their unique physical and chemical properties, rheological properties and biological safety, microbial polysaccharides have been widely used in many fields, such as industrial production and life. But due to high production costs and less production limit its wide application. The screening, isolating and culturing of microbial strains of extracellular polysaccharides were introduced in this paper, and the optimization of production of flocculant conditions and the separation and purification of extracellular polysaccharides were also discussed. Furthermore, the research status of the microbial exopolysaccharide metabolic pathway was focused. The method of improving the production of extracellular polysaccharides can be found by the study of metabolic pathways of microbial exopolysaccharides, which lays the foundation for the industrial application of microbial extracellular polysaccharide.
Advances in Microbiology