The invention relates to a strain of
Scenedesmus obliquus producing a self-
flocculation substance, and an application of the
Scenedesmus obliquus in microalgae harvesting, and belongs to the technical field of microbial applications. The strain has a classification name of
Scenedesmus obliquus and a preservation number of CGMCC No.6567, and is preserved in China General
Microbiological Culture Collection Center (CGMCC) on September 14, 2012, wherein the address is Institute of
Microbiology, Chinese Academy of Sciences, 3# Court No.1, Beichen West Road, Chaoyang District, Beijing. With a
flocculation substance produced by the
Scenedesmus obliquus AS-6-1, non-
flocculation strains such as freshwater
scenedesmus FSP-3, freshwater
chlorella CNW-11 and
seawater chlorella DUT01 can be subjected to rapid flocculation harvesting so as to provide broad application prospects in microalgae harvesting. The flocculation substance is separated and purified from the self-flocculation
Scenedesmus obliquus AS-6-1
cell wall, and is a water-soluble
polysaccharide, wherein the non-flocculation
scenedesmus FSP-3 is treated with 0.6 mg / L of the flocculation substance, and the flocculation efficiency can reach 80%; and the most suitable pH value is 7.0, the most suitable temperature is 30 DEG C, the flocculating activity does not require
metal ions, and characteristics of time saving, efficiency, good pH value stability and good
thermal stability are provided.