TY - JOUR ID - TI - Optimum operation conditions of nitrogen and phosphorus removal by a biofilm-activated-sludge system AU - LIU Jun-xin AU - J.W. van Groenestijn VL - 15 IS - 1 PB - SP - 25 EP - 30 PY - JF - Journal of Environmental Sciences JA - J. Environ. Sci. UR - http://www.jesc.ac.cn/jesc_en/ch/reader/view_abstract.aspx?file_no=20030104&flag=1 KW - nitrification; denitrification; phosphorus removal; biofilm; activated sludge KW - nitrification; denitrification; phosphorus removal; biofilm; activated sludge AB - In the biofilm and activated sludge combined system, denitrifying bacteria attached on the fibrous carriers in the anoxic tank, while the sludge containing nitrifying and phosphorus removal bacteria was only recirculated between the aerobic and anaerobic tanks. Therefore, the factors affected and restricted nitrification, denitrification and phosphorus removal in a traditional A/A/O process were resolved. This paper describes the optimum operation conditions for nitrogen and phosphorus removal using this system ER -