In the upflow anaerobic central processing unit and treatment

摘要

PROBLEM TO BE SOLVED: To further simplify the equipment structure and to enable more efficient separation of formed gas, more efficient settling separation of sludge particles and highly efficient treatment of organic wastewater by placing a lower stage three-phase separation member and an upper stage three-phase separation member which is positioned above the lower stage three phase separation member and has almost the same structure as that of the lower stage three-phase separation member, and using the space between both the two separation members as a flow rectification zone, in the equipment.;SOLUTION: This equipment is provided with: an anaerobic treatment vessel 1; a water-to-be- treated supply means 8 which is placed in the lower part of the treatment vessel 1 and connected to a water-to-be-treated supply flow passage 11; a treated water overflow member 15 which is placed in the upper part of the treatment vessel 1 and used for discharging treated water to the preceding stage by allowing the treated water to overflow; a treated water pit 17 placed outside the vessel 1; two stage three-phase separation members 2 and 3 each of which is used for separating a treatment mixture into three phases, i.e., a gas, a liquid and sludge and placed in the horizontal direction in the intermediate part of the treatment vessel 1; a circulation flow passage 14a which is used for circulating a liquid through the water-to-be-treated supply means 8 and connected to the treatment vessel 1 at a position midway between the three-phase separation members 2 and 3; a sludge bed A which is formed below the lower stage three-phase separation member 2 and in which sludge particles are fluidized; and a flow rectification zone which is formed between the lower and upper stage three-phase separation members 2 and 3 and is effective in promoting the settlement of sludge particles entrained by the upflow stream.;COPYRIGHT: (C)2000,JPO