Application of chlorella and heterotrophic nitrification-aerobic denitrification complex microbial inoculum as 3D-RBC biofilm culturing inoculum and method of chlorella and heterotrophic nitrification-aerobic denitrification complex microbial inoculum as 3D-RBC biofilm culturing inoculum

The invention discloses an application of chlorella and a heterotrophic nitrification-aerobic denitrification complex microbial inoculant as a 3D-RBC biofilm culturing inoculant and a method. The method comprises the following steps: preparing the heterotrophic nitrification-aerobic denitrification complex microbial inoculant and FACHB-9 chlorella pyrenoidosa according to a volume ratio of 1: 1-1: 6 into a mixed solution, and inoculating the mixed solution to a 3D-RBC inoculation biological rotating disc; the inoculation amount is 15%-20% of the effective volume of the 3D-RBC biological rotating disc, the linear speed of the disc is controlled to be 3-10 m/min under illumination, culture is performed at the temperature of 25-30 DEG C until a symbiotic biofilm with the thickness of 1-2 mm is formed on the surface of the reactor, and the OD680 value is smaller than 0.5, and biofilm culturing and sewage treatment are completed; when the inoculum is used for biofilm culturing 3D-RBC, the high nitrogen removal eff