NOVELTY - Processing wastewater involves introducing to-be-processed wastewater into coagulation reaction zone of wastewater processing system, adding regenerated microorganism coagulant to reaction zone, introducing wastewater and microbubbles to floating zone, combining microorganism floc with microbubble, introducing scrapped microorganism floc to microorganism coagulant regeneration zone, contacting microorganism floc with obtained microbubbles, decomposing absorbed organic matter, and adding obtained coagulant to reaction zone.    USE - The method is useful for processing wastewater.    ADVANTAGE - The method is inexpensive, convenient to perform and stable in operation, and has high removal rate, causes no secondary pollution, and wide application prospect.    DETAILED DESCRIPTION - Method of processing wastewater through microorganism coagulation flotation, involves (a) introducing to-be-processed wastewater into a coagulation reaction zone of a wastewater processing system, adding regenerated microorganism coagulant to the coagulation reaction zone, mixing the wastewater uniformly by stirring, absorbing pollutant in the wastewater through the microorganism, and forming large microorganism floc, (b) introducing microbubbles to a floating zone through a floating device, passing the wastewater mixed with microorganism floc to the floating zone from the coagulation reaction zone, and combining the microorganism floc with the microbubble, (c) starting a scraper, scrapping the microorganism floc out of the flotation zone, and discharging the processed wastewater through a water discharge pipe, (d) introducing the microorganism floc absorbed with a large amount of pollutant scraped by the scraper to the microorganism coagulant regeneration zone, blowing a large amount of air to the coagulant regeneration zone through a blower, dispersing the air by an aerator to form microbubbles, contacting the microorganism floc with the bubble, decomposing absorbed organic matter by the oxygen to obtain organic matter capable of coagulating such that regeneration of the microorganism coagulant is realized, and adding the regenerated microorganism coagulant to the coagulation reaction zone through a pump and reusing. An INDEPENDENT CLAIM is included for device, which comprises one set of wastewater processing system and one set of microorganism coagulant regeneration system. The wastewater processing system comprises coagulation reaction zone (1) and floatation zone (2), water inlet pipe (4), stirrer (6) connected to the coagulation reaction zone (1), microorganism coagulant feeding pump (14), pipeline (5), water outlet pipe (9), scrapper (7) and gas dissolving device (8) connected to the floatation zone, and microorganism floc return pipe (10). The microorganism coagulant regeneration system comprises a microorganism coagulant regeneration zone (3), fan (11) connected to the microorganism coagulant regeneration zone, an air tube (12) and an aeration head (13), and nutrient solution storage tank (15) and nutrient solution supply tube (16).    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of device.    Coagulation reaction zone (1)    Floatation zone (2)    Microorganism coagulant regeneration zone (3)    Water inlet pipe (4)    Pipeline (5)    Stirrer (6)    Scrapper (7)    Gas dissolving device (8)    Water outlet pipe (9)    Microorganism floc return pipe (10)    Fan (11)    Air tube (12)    Aeration head (13)    Microorganism coagulant feeding pump (14)    Nutrient solution storage tank (15)    Nutrient solution supply tube (16)