| Title |
Wastewater Treatment by the Combination Process of Activated Sludge and Ultrafiltration Membrane |
| Authors |
서정범 ; 윤조희 ; 임연택 ; 홍정선 ; 류재근 ; 서윤수 ( J . B . Seo ; C . H . Yoon ; Y . T . Rim ; J . S . Hong ; J . K . Ryu ; Y . S . Suh ) |
| Abstract |
Membrane technology has been emerging as one of essential processes for wastewater treatment. Ultrafiltration(UF) can seperate the biomass from Activated sludge(AS) process and maintain higher biomass concentration in the process. This combination of AS and UF can have many advantages such as better effluent quality and system stability over the conventional process. In this experiment, UF combined to AS was used to investigate the effects of various operational factors on the performance of the system and the change of microorganism groups. Following conclusions were obtained. 1) Good effluent quality was obtained at high organic loading rate and good stability was maintained throughout the experiment. 2) The flux was stable with the high value when organic loading rate was maintained below 0.8㎏BOD/㎥·d at 1m/sec surface velocity. 3) The flux was decreased with increasing organic loading rate due to the sludge adherance and clogging of substrate to membrane core. 4) Microorganism groups in the aeration basin was affected due to high velocity of fluidization. Protozoa numbers were rapidly decreased with increasing surface velocity. |