摘要：This study conducted investigations at a pilot scale MBR plant, located in Al Khomra, Jeddah for a period of three months. The plant received wastewater from a residential area and adjoining workshops. Irrespective of the applied Mixed Liquor Suspended Solids (MLSS) concentrations (10, 15 and 20 g L-1) and hydraulic retention times, HRT (8, 6 and 3 h), the MBR units realized excellent organics, nutrients and pathogen removal performances. In the course of the investigation, the influent Biochemical Oxygen Demand (BOD) (198-253 mg L-1), Chemical Oxygen Demand (COD) (445-575 mg L-1), Total Kjeldhal Nitrogen (TKN) (18-26 mg L-1) and Total Phosphorous (TP) (8.6-13.6 mg L-1) were removed with efficiencies varying within the ranges of 95-98, 90-95, 98.64-100 and 40-50%, respectively. A 2.1-3.1 log removal of fecal coliforms and a 5-6 log removal of total Coliforms were also accomplished. The best quality effluent achieved during this investigation convincingly satisfied the quality requirements for reuse for irrigation purpose in the country. Furthermore, severe membrane fouling, requiring chemical cleaning, was not encountered during the operation period.
