METHOD OF SEPARATING SEWAGE

PROBLEM TO BE SOLVED: To provide a method of separating sewage by sedimentation for sedimenting flock formed by blowing fine bubbles into the sewage in a sedimentation vessel to which an aerobic microbe is added in order to induce the proliferation of the aerobic microbe so as to expedite the formation of the flock for changing a specific gravity of the body of water. SOLUTION: In a sedimentation vessel with an aerobic microbe added therein, blowing very fine bubbles into sewage subjects flocked suspended matter to self-weight sedimentation by the specific gravity difference between the flocked suspended matter and the body of water since a DO value in the sewage is increased to induce the proliferation of the aerobic microbe so as to enhance the formation of flock, the specific gravity of the body of water is decreased to induce the self-weight sedimentation of suspended matter floating in water, and further a foamed layer which is light in specific gravity is produced under the flocked suspended matter. COPYRIGHT: (C)2010,JPO&INPIT