title: Energy-positive food wastewater treatment using an anaerobic membrane bioreactor (AnMBR).
abstract: An immersed-membrane anaerobic membrane bioreactor (AnMBR) achieved 88-95% of COD removal for meat-processing wastewater at organic loading rate (OLR) of 0.4-3.2 kgCOD m(-3) d(-1). Membrane flux was stable for low OLR (0.4 and 1.3 kgCOD m(-3) d(-1)), but irrecoverable fouling occurred at high OLR of 3.2 kgCOD m(-3) d(-1). Methane gas yield of 0.13-0.18 LCH4 g(-1)CODremoved was obtained, which accounted for 33-38% of input COD, the most significant electron sink. Dissolved methane was only 3.4-11% of input COD and consistently over-saturated at all OLR conditions. The least accumulation of dissolved methane (25 mg L(-1) and saturation index 1.3) was found for the highest OLR of 3.2 kgCOD m(-3) d(-1) where biogas production rate was the highest. Energy balances showed that AnMBR produced net energy benefit of 0.16-1.82 kWh m(-3), indicating the possibility of energy-positive food wastewater treatment using AnMBRs.
authors.affiliation: Department of Civil and Environmental Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON, N2L3G1, Canada.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Galib
authors.affiliation: Department of Civil and Environmental Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON, N2L3G1, Canada; Department of Civil Engineering, Ryerson University, 350 Victoria Street, Toronto, ON, M5B 2K3, Canada.
authors.forename: Elsayed
authors.initials: E
authors.lastname: Elbeshbishy
authors.affiliation: Department of Civil and Environmental Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON, N2L3G1, Canada.
authors.forename: Robertson
authors.initials: R
authors.lastname: Reid
authors.affiliation: Department of Civil and Environmental Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON, N2L3G1, Canada.
authors.forename: Abid
authors.initials: A
authors.lastname: Hussain
authors.affiliation: Department of Civil and Environmental Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON, N2L3G1, Canada. Electronic address: hyungsool@uwaterloo.ca.
authors.forename: Hyung-Sool
authors.initials: HS
authors.lastname: Lee
mesh_terms: D000693:Anaerobiosis; D056804:Biofuels; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D019649:Food Industry; D007220:Industrial Waste; D008461:Meat Products; D008567:Membranes, Artificial; D008697:Methane / Q000096:biosynthesis* / Q000737:chemistry; D010539:Permeability; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods*; D062065:Wastewater / Q000032:analysis*
chemical_list: D056804:Biofuels; D007220:Industrial Waste; D008567:Membranes, Artificial; D008697:Methane; D062065:Wastewater
keywords: Anaerobic membrane bioreactor; Dissolved methane; Energy efficiency; Membrane flux; Wastewater