Sewage in Algerian Oasis: Comparison of the Purifying Efficiency of two Processes (WWTP and WWTAS)

The present study was conducted to compare between two treatments of wastewater processes (wastewater treatment plants “WWTP” and wastewater treatment by activated sludge “WWTAS”). To compare the physical and chemical parameters, water was analyzed at the entrance and the exit of each station. Results showed that during the study period, the average removal rates in the case of WWTAS were 85% for SS, 90% for filtered BOD5 and 90% for COD. While in the case of WWTP; the average removal rates were: 92% for SS, 88% for BOD5 and 90% for COD.