ABSTRACT
In spite of variations in the concentration of the suspended solids (SS) in the raw wastewater, the efficiency of its removal in a ST is fairly stable with a value ranging between 60% and 80% (Bounds 1997, US EPA 2002, Seabloom et al. 2004, Rothe & Lowe 2006). Rothe and Lowe (2006) estimate the concentration of total suspended solids (TSS) in raw domestic wastewater in the USA to be in a range of between 18 and 2232 mg/dm3, while the US Environmental Protection Agency (US EPA 2002) projects values between 155 and 330 mg/dm3. These sources also estimate the concentration of TSS in the ST effluent at 22 to 276 mg/dm3 and 50 to 100 mg/dm3, respectively.
