MBR can produce consistently high quality effluent from municipal wastewater and a successful pilot study has already demonstrated advantages of the MBR process for reclaiming the domestic sewage in Singapore. However, a mixed sewage mostly from industrial sources (60% industrial waste and 40% domestic waste) poses a challenge for MBR application. The objective of this study was to determine the feasibility of reclaiming such a mixed sewage using a submerged MBR. A process of anoxic reaction - aerobic reaction - membrane filtration with submerged PVDF hollow fibre modules was used in the study. The MBR process was evaluated over 3 months. The pilot results indicated that HRT of 15 h in MBR might be required for treating the mixed sewage and a membrane flux of 17 LMH was sustainable in the MBR process. The MBR process demonstrated the improved product quality in terms of NH4 and COD compared to the process of conventional activated sludge treatment-ultrafiltration. The study concluded the MBR process was capable of producing water suitable for industrial use from the mixed sewage. (c) 2006 Elsevier B.V. All rights reserved.