Evaluation of Flat Sheet Membrane Bioreactor Efficiency for Municipal Wastewater Treatment Publisher



Fazeli S¹ ; Fatehizadeh A² ; Hassani AH¹ ; Torabian A³ ; Amin MM²
Source: International Journal of Environmental Health Engineering Published:2012

Abstract

Aim: In this paper, the feasibility of flat-sheet membrane bioreactor (FS-MBR) for municipal wastewater treatment was studied. Materials and Methods: In this study, treatment of municipal wastewater in a submerged FS-MBR was investigated under different aeration time and flux. A bioreactor consist of microfiltration membrane (MF) and actual municipal wastewater as influent stream. The FS-MBR was operated during 161 days. Results: The result showed that average removal efficiencies of chemical oxygen demand (COD), biological oxygen demand (BOD5), total suspended solids (TSS) and volatile suspended solids (VSS) were obtained 90% and with variation of influent COD, BOD5, TSS and VSS, the removal efficiency no significantly change. The mixed liquor-suspended solids (MLSS) and mixed liquor volatile-suspended solids (MLVSS) concentration during experiment increases from low concentration to about 7.9 and 6.5 g/L, respectively. The average of PO4 3+-P, total kjeldahl nitrogen (TKN), ammonia and fecal coliform (FC) removal efficiency during the operation period was 62, 98, 70% and 8 log, respectively. Conclusion: It is concluded that FS-MBR can be used in the large scale municipal wastewater treatment plants to improve effluent quality due to high removal of COD, BOD5, TSS and VSS to meet effluent discharge standards. © 2012 Medknow. All Rights Reserved.