A.
phosphorus removal, nitrification, and denitrification除磷、硝化、反硝化
B.
nitrification, denitrification and phosphorus removal硝化、反硝化、除磷
C.
organic matter removal, nitrification, denitrification, phosphorus removal去除有机物、硝化、反硝化、除磷
D.
organic matter removal, nitrification, denitrification, advanced treatment去除有机物、硝化、反硝化、深度处理