Abstract
The treatment performance and operational parameters of the process, which was composed of pre-coagulation-sedimentation tanks, biofilm reactors and an aerated filter, were discussed with the pilot plant treating actual municipal sewage. Concentrations of SS, T-ATU-BOD, T-N and T-P in the effluent were kept less than 5mg/L, 5mg/L, 3mgN/L and 1mgP/L, respectively, under total hydraulic retention time (HRT) of 8h in the biological process. In the aerated filter, removal of residual organic matter and SS, and restoring DO concentration could be accomplished. The process was proved to be applicable to advanced treatment of municipal sewage without a secondary sedimentation tank.
