TREATMENT OF WASTE WATER BASED ON ANAEROBIC TREATMENT

摘要

PURPOSE:To contrive to conserve energy, by applying anaerobic treatment to high concn. org. waste water two times in succession before applying aerobic treatment thereto using immobilized bacteria. CONSTITUTION:A sedimentation tank 20 being an acid forming reaction liquid receiving tank is arranged between an acid forming tank 11 and a gas forming tank 12. The waste water storage tank 22 arranged in a cooling tank 21 is provided in the upstream side of the acid forming tank 11. Org. waste water is supplied to the acid forming tank 11 from the waste water storage tank 22 in the cooling tank 21 by a pump 23 and subsequently once received in the sedimentation tank 20 by a pump 24 and further continuously or intermittently supplied to the gas forming tank 12 by a pump 25 and upwardly rises through said tank 12 to be issued from the top of the tank and returned to the bottom of the tank 12 by a pump 26 through the outside of the tank 12. The waste water is recirculated as mentioned above and treated waste water flows out of a bacteria sedimentation part 18. Digestion sludge for high temp. treatment is used in the acid forming tank 11 and the gas forming tank 12 to treat bacteria.