Journal
JOURNAL OF ENVIRONMENTAL MANAGEMENT
Volume 182, Issue -, Pages 477-485Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2016.07.098
Keywords
Anaerobic membrane bioreactor; Wastewater; Energy efficiency; Membrane flux; Dissolved methane
Categories
Funding
- Ministry of Economic Development and Innovation
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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 L-CH4 g(-1)COD(removed) 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. (C) 2016 Elsevier Ltd. All rights reserved.
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