TREATMENT OF WASTEWATERS FROM THE TAMUDA BAY ACTIVE SLUDGE TREATEMENT PLANT IN TETOUAN MOROCCO

The activated sludge process is an intensive process for the treatment of waste water. It is well adapted to the discharges of large communities and is very efficient for the treatment of carbon, nitrogen and phosphorus. The objective of this work is to first characterize the physico-chemical quality of the raw effluent from the Tamuda WWTP and then to evaluate the treatment performance. The COD pollutant load at the entrance to the plant has increased from January onwards, rising from 172,506 kg/d to 219,506 kg/d. On the other hand, at the exit of the plant, the load has decreased up to 30%, which is explained by the functionality of the treatment carried out. The BOD5 load at the entrance of the station shows a variation between 87,215 kg/d 113,672 kg/d. The BOD5 at the outlet shows a decreasing trend, with the majority of the measured values now in the range 1284 to 6203 kg/d. The TSS flows obtained are well above the standards and are probably caused by sewage discharges and urban domestic discharges which are rich in colloidal material of mineral or organic origin. Finally, the average pollution abatement yields over the monitoring period are 92% for TSS, 90% for filtered BOD5 and 83% for COD.