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



Fazeli S1 ; Fatehizadeh A2 ; Hassani AH1 ; Torabian A3 ; Amin MM2
Authors
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Authors Affiliations
  1. 1. School of Environment and Energy, Science and Research Branch, Islamic Azad University of Tehran, Tehran, Iran
  2. 2. Environment Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
  3. 3. Department of Civil-Environmental Engineering, University of Tehran, Tehran, Iran

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.
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