ANAEROBIC FLUIDIZED BED WASTE WATER TREATMENT AND DEVICE THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide an anaerobic fluidized bed waste treating method and to miniaturize a treating device therefor in which an aerobic treatment of waste water is made with high efficiency without even carriers of low equipment shear force and of small specific gravity being broken in treatment in which carriers holding anaerobic bacteria are circulated with a high filling rate in a waste water treating tank. SOLUTION: A waste water treating tank 1 in which a conduit 2 is vertically installed is densely filled with carriers holding anaerobic bacteria. By jetting water from which the carriers have been separated to the lower part of the conduit 2 from the upper part of the waste water treating tank 1, a lowering flow is generated in the conduit 2. The carriers 8 are passed through the conduit 2 from the upper part to the lower part thereof, and the carriers 8 which have been led to the lower part of the conduit 2 are discharged from the lower part of the conduit 2 to turn and raise them in the water treating tank 1. The carriers 8 are lowered from the upper part of the conduit 2 to the power part thereof and also are turned and raised in the water treating tank 1 from the lower part toward the upper part thereof and circulated to the upper part of the conduit 2.