Raw wastewater (after the sedimentation
tank), and input and output samples were analysed
monthly according to Standard Methods (APHA, 1992) and
included: pH, total suspended solids (TSS), total and dissolved
chemical oxygen demand (COD), total and dissolved biological
oxygen demand (BOD5), total nitrogen (TN), total phosphorus (TP),
faecal coliforms (FC) and chlorophyll a (Cha).