Graphene-coated hollow fiber membrane as the cathode in anaerobic electrochemical membrane bioreactors – Effect of configuration and applied voltage on performance and membrane fouling
Type
ArticleAuthors
Werner, Craig M.Katuri, Krishna
Rao, Hari Ananda

Chen, Wei
Lai, Zhiping

Logan, Bruce E.
Amy, Gary L.
Saikaly, Pascal

KAUST Department
Advanced Membranes and Porous Materials Research CenterBiological and Environmental Sciences and Engineering (BESE) Division
Chemical Engineering Program
Environmental Biotechnology Research Group
Environmental Science and Engineering Program
Office of the VP
Physical Science and Engineering (PSE) Division
Water Desalination and Reuse Research Center (WDRC)
Date
2016-01-06Online Publication Date
2016-01-06Print Publication Date
2016-04-19Permanent link to this record
http://hdl.handle.net/10754/592615
Metadata
Show full item recordAbstract
Electrically conductive, graphene-coated hollow-fiber porous membranes were used as cathodes in anaerobic electrochemical membrane bioreactors (AnEMBRs) operated at different applied voltages (0.7 V and 0.9 V) using a new rectangular reactor configuration, compared to a previous tubular design (0.7 V). The onset of biofouling was delayed and minimized in rectangular reactors operated at 0.9 V, compared to those at 0.7 V due to higher rates of hydrogen production. Maximum transmembrane pressures for the rectangular reactor were only 0.10 bar (0.7 V) or 0.05 bar (0.9 V) after 56 days of operation, compared to 0.46 bar (0.7 V) for the tubular reactor after 52 days. The thickness of the membrane biofouling layer was approximately 0.4 µm for rectangular reactors and 4 µm for the tubular reactor. Higher permeate quality (TSS = 0.05 mg/L) was achieved in the rectangular AnEMBR than the tubular AnEMBR (TSS = 17 mg/L), likely due to higher current densities that minimized the accumulation of cells in suspension. These results show that the new rectangular reactor design, which had increased rates of hydrogen production, successfully delayed the onset of cathode biofouling and improved reactor performance.Citation
Graphene-coated hollow fiber membrane as the cathode in anaerobic electrochemical membrane bioreactors – Effect of configuration and applied voltage on performance and membrane fouling 2015 Environmental Science & TechnologyPublisher
American Chemical Society (ACS)PubMed ID
26691927Additional Links
http://pubs.acs.org/doi/10.1021/acs.est.5b02833ae974a485f413a2113503eed53cd6c53
10.1021/acs.est.5b02833
Scopus Count
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Articles; Biological and Environmental Science and Engineering (BESE) Division; Advanced Membranes and Porous Materials Research Center; Environmental Science and Engineering Program; Physical Science and Engineering (PSE) Division; Chemical Engineering Program; Water Desalination and Reuse Research Center (WDRC)Related articles
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