| 摘要 |
PURPOSE:To highly remove nitrogen and phosphorus in sewage and to facilitate operation control. CONSTITUTION:A biological membrane filter tank 6 is connected to the rear stage of the flow of a conventional A2O method consisting of an anaerobic tank 1, a denitrifying tank 2, an aerobic tank 3 and a sedimentation basin 4. The taking-in of phosphorus and the decomposition of BOD are performed in the aerobic tank 3 and nitrification is performed in the biological membrane filter tank 6. A part of the outflow water from the biological membrane filter tank 6 is circulated to the denitrifying tank 2. |
