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dc.contributor.authorMehanna, Maha
dc.contributor.authorSaito, Tomonori
dc.contributor.authorYan, Jingling
dc.contributor.authorHickner, Michael
dc.contributor.authorCao, Xiaoxin
dc.contributor.authorHuang, Xia
dc.contributor.authorLogan, Bruce E.
dc.date.accessioned2016-02-28T06:43:49Z
dc.date.available2016-02-28T06:43:49Z
dc.date.issued2010
dc.identifier.citationMehanna M, Saito T, Yan J, Hickner M, Cao X, et al. (2010) Using microbial desalination cells to reduce water salinity prior to reverse osmosis. Energy Environ Sci 3: 1114. Available: http://dx.doi.org/10.1039/c002307h.
dc.identifier.issn1754-5692
dc.identifier.issn1754-5706
dc.identifier.doi10.1039/c002307h
dc.identifier.urihttp://hdl.handle.net/10754/600152
dc.description.abstractA microbial desalination cell (MDC) is a new method to reduce the salinity of one solution while generating electrical power from organic matter and bacteria in another (anode) solution. Substantial reductions in the salinity can require much larger volumes of the anode solution than the saline water, but any reduction of salinity will benefit the energy efficiency of a downstream reverse osmosis (RO) desalination system. We investigated here the use of an MDC as an RO pre-treatment method using a new type of air-cathode MDC containing three equally sized chambers. A single cycle of operation using a 1 g L -1 acetate solution reduced the conductivity of salt water (5 g L-1 NaCl) by 43 ± 6%, and produced a maximum power density of 480 mW m-2 with a coulombic efficiency of 68 ± 11%. A higher concentration of acetate (2 g L-1) reduced solution conductivity by 60 ± 7%, and a higher salt concentration (20 g L-1 NaCl) reduced solution conductivity by 50 ± 7%. The use of membranes with increased ion exchange capacities further decreased the solution conductivity by 63 ± 2% (20 g L-1 NaCl). These results demonstrate substantial (43-67%) desalination of water is possible using equal volumes of anode solution and salt water. These results show that MDC treatment could be used to substantially reduce salt concentrations and thus energy demands for downstream RO processing, while at the same time producing electrical power. © 2010 The Royal Society of Chemistry.
dc.description.sponsorshipThe authors thank S. Cheng and D. Jones for assistance with experiments and analysis. This research was supported by Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST).
dc.publisherRoyal Society of Chemistry (RSC)
dc.titleUsing microbial desalination cells to reduce water salinity prior to reverse osmosis
dc.typeArticle
dc.identifier.journalEnergy & Environmental Science
dc.contributor.institutionPennsylvania State University, State College, United States
dc.contributor.institutionTsinghua University, Beijing, China
kaust.grant.numberKUS-I1-003-13


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