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A new flat sheet membrane bioreactor hybrid system for advanced treatment of effluent, reverse osmosis pretreatment and fouling mitigation

Hosseinzadeh, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.biortech.2015.05.066
  3. Abstract:
  4. This paper introduces a new hybrid electro membrane bioreactor (HEMBR) for reverse osmosis (RO) pretreatment and advanced treatment of effluent by simultaneously integrating electrical coagulation (EC) with a membrane bioreactor (MBR) and its performance was compared with conventional MBR. Experimental results and their statistical analysis showed removal efficiency for suspended solids (SS) of almost 100% for both reactors. HEMBR removal of chemical oxygen demand (COD) improved by 4% and membrane fouling was alleviated according to transmembrane pressure (TMP). The average silt density index (SDI) of HEMBR permeate samples was slightly better indicating less RO membrane fouling. Moreover, based on the SVI comparison of two reactor biomass samples, HEMBR showed better settling characteristics which improved the dewaterability and filterability of the sludge. Analysis the change of membrane surfaces and the cake layer formed over them through field emission scanning electron microscopy (FESEM) and X-ray fluorescence spectrometer (XRF) were also discussed
  5. Keywords:
  6. Electrical coagulation ; Fouling ; Membrane bioreactor ; Reverse osmosis ; Bioconversion ; Coagulation ; Effluent treatment ; Field emission microscopes ; Hybrid systems ; Membrane fouling ; Membranes ; Scanning electron microscopy ; X ray spectrometers ; Field emission scanning electron microscopy ; Flat sheet membranes ; Membrane bio reactor (MBR) ; Reverse osmosis pre-treatment ; Settling characteristics ; Transmembrane pressures ; X-ray fluorescence spectrometer ; Bioreactors ; Bioreactor ; Chemical reaction ; Efficiency measurement ; Effluent ; Membrane ; Osmosis ; Performance assessment ; Silt ; Sludge ; Suspended load ; Activated sludge ; Article ; Chemical oxygen demand ; Controlled study ; Current density ; Effluent ; Electrocoagulation ; Electrolysis ; Energy consumption ; Flow rate ; Fouling control ; Hybrid electro membrane bioreactor ; Membrane reactor ; Microbial activity ; Priority journal ; Sewage treatment ; Sludge settling ; Sludge treatment ; Suspended particulate matter
  7. Source: Bioresource Technology ; Volume 192 , 2015 , Pages 177-184 ; 09608524 (ISSN)
  8. URL: http://www.sciencedirect.com/science/article/pii/S0960852415007397