Journal
WATER RESEARCH
Volume 47, Issue 15, Pages 5794-5800Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2013.06.058
Keywords
Membrane bioreactors; Electrochemical MBR; Membrane fouling; Hydrogen peroxide
Funding
- National Hi-Technology Development 863 Program of China [2011AA060907]
- NSFC [51008290]
- Program for New Century Excellent Talents in University
- Program for Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China
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How to mitigate membrane fouling remains a critical challenge for widespread application of membrane bioreactors. Herein, an antifouling electrochemical membrane bioreactor (EMBR) was developed based on in-situ utilization of the generated electricity for fouling control. In this system, a maximum power density of 1.43 W/m(3) and a current density of 18.49 A/m(3) were obtained. The results demonstrate that the formed electric field reduced the deposition of sludge on membrane surface by enhancing the electrostatic repulsive force between them. The produced H2O2 at the cathode also contributed to the fouling mitigation by in-situ removing the membrane foulants. In addition, 93.7% chemical oxygen demand (COD) removal and 96.5% NH4+ - N removal in average as well as a low effluent turbidity of below 2 NTU were achieved, indicating a good wastewater treatment performance of the EMBR. This work provides a proof-of-concept study of an antifouling MBR with high wastewater treatment efficiency and electricity recovery, and implies that electrochemical control might provide another promising avenue to in-situ suppress the membrane fouling in MBRs. (C) 2013 Elsevier Ltd. All rights reserved.
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