title: A new flat sheet membrane bioreactor hybrid system for advanced treatment of effluent, reverse osmosis pretreatment and fouling mitigation.
abstract: 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.
authors.affiliation: Water and Wastewater Engineering Group, Graduate Faculty of Environment, University of Tehran, Tehran, Iran. Electronic address: hosseinzadeh_m@ut.ac.ir.
authors.forename: Majid
authors.initials: M
authors.lastname: Hosseinzadeh
authors.affiliation: Water and Wastewater Engineering Group, Graduate Faculty of Environment, University of Tehran, Tehran, Iran.
authors.forename: Gholamreza Nabi
authors.initials: GN
authors.lastname: Bidhendi
authors.affiliation: Water and Wastewater Engineering Group, Graduate Faculty of Environment, University of Tehran, Tehran, Iran.
authors.forename: Ali
authors.initials: A
authors.lastname: Torabian
authors.affiliation: Water and Wastewater Engineering Group, Graduate Faculty of Environment, University of Tehran, Tehran, Iran.
authors.forename: Naser
authors.initials: N
authors.lastname: Mehrdadi
authors.affiliation: Environmental and Water Research Center, School of Civil Engineering, Sharif University of Technology, Tehran, Iran.
authors.forename: Mehdi
authors.initials: M
authors.lastname: Pourabdullah
mesh_terms: D057919:Biological Oxygen Demand Analysis / Q000295:instrumentation*; D018533:Biomass; D019149:Bioreactors; D007220:Industrial Waste; D008567:Membranes, Artificial; D009995:Osmosis; D010100:Oxygen / Q000737:chemistry; D012722:Sewage / Q000737:chemistry*; D014462:Ultrafiltration / Q000295:instrumentation*; D014865:Waste Disposal, Fluid / Q000295:instrumentation*; D018508:Water Purification / Q000295:instrumentation*
chemical_list: D007220:Industrial Waste; D008567:Membranes, Artificial; D012722:Sewage; D010100:Oxygen
keywords: Electrical coagulation; Fouling; Membrane bioreactor; Reverse osmosis