NOVELTY - Fermenting method of microbe polysaccharide flocculant involves fermenting and culturing arthrobacterium LF-Tou2 as production strain. Fermenting method used is cascaded strain proliferation fermenting method in a series of connected fermenting tank where the feeding coefficient of fermenting tank 1 is 70-80% and the inoculating amount is 2-10%. The culturing temperature in the fermenting tanks is 20-32 degrees C, the rotation speed is 100-250 rpm and the tank pressure is 0.01-0.03 MPa.    USE - Microbe polysaccharide flocculant for purifying water quality, processing water quality of inland lakes and sewages, and separating fermented industrial bio-product.    ADVANTAGE - The microbe polysaccharide flocculant is innoxious and biodegradable, has low production cost, wide application scope, high usage efficiency, no secondary pollution, can remove inorganic ion, reduce organic matter content and absorb heavy metal.    DETAILED DESCRIPTION - Fermenting method of microbe polysaccharide flocculant involves fermenting and culturing arthrobacterium LF-Tou2 as production strain. Fermentation of flocculant is performed by dissolving ammonium sulfate ((NH4)2SO4) in 150 parts water, dissolving starch sugar, dipotassium phosphate (K2HPO4), magnesium sulfate (MgSO4), calcium chloride (CaCl2) and corn pulp in 850 parts water, sterilizing the two solutions for 8 minutes at 120 degrees C, fermenting and culturing in fermenting tank 1 for 8-14 hours, transferring 85-95% of culture solution to fermenting tank 2, adding fresh culture medium into fermenting tank 1, performing propagation culturing, continuously culturing in fermenting tank 2 until the fermentation is finished, transferring to ultrafiltration membrane machine to filter and separate the fermented solution, getting the ultrafiltrated permeate liquid, mixing 20-60% of the ultrafiltrated permeate liquid with fermentation water and recycling the filtrate to reach zero discharge. Fermentation tank is a straight turbo type aerate fermenting tank. Fermenting method used is cascaded strain proliferation fermenting method in a series of connected fermenting tank where the feeding coefficient of fermenting tank 1 is 70-80% and the inoculating amount is 2-10%. The culturing temperature in the fermenting tanks is 20-32 degrees C, the rotation speed is 100-250 rpm and the tank pressure is 0.01-0.03 MPa. The fermentation culture medium contains 15-25 parts starch sugar, 1-5 parts (NH4)2SO4, 1-8 parts K2HPO4, 0.1-1 parts MgSO4, 0.2-1.5 parts CaCl2, 0.1-1.5 parts corn pulp and 1000 parts water.    DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart of the fermenting method of microbe polysaccharide flocculant. (Drawing includes non-English language text).