Assessment of the efficiency of a municipal wastewater treatment plant from Romania. A case study

The present study was carried out to evaluate the efficiency of a municipal wastewater treatment plant (WWTP) that uses biological treatment processes with activated sludge. The WWTP monitoring was carried out at the end of 2023, after the expansion and modernization stage, achieved during the period 2018-2023. The wastewater samples were collected from three important points of the wastewater treatment plant for four weeks, between October and November 2023. The physical-chemical parameters analyzed were: pH, chemical oxygen demand (COD), biochemical oxygen demand (BOD5), total suspended solids (TSS), volatile suspended solids (VSS), total nitrogen (TN), ammonia nitrogen (N-NH4+), nitrates (N-NO3-), total phosphorus (TP). The obtained results were beneficial for checking the performance parameters of the sewage treatment plant.