Enhanced water desalination efficiency in an air-cathode stacked microbial electrodeionization cell (SMEDIC)

Handle URI:
http://hdl.handle.net/10754/563811
Title:
Enhanced water desalination efficiency in an air-cathode stacked microbial electrodeionization cell (SMEDIC)
Authors:
Chehab, Noura A. ( 0000-0002-5197-9517 ) ; Amy, Gary L.; Logan, Bruce E.; Saikaly, Pascal ( 0000-0001-7678-3986 )
Abstract:
A microbial desalination cell was developed that contained a stack of membranes packed with ion exchange resins between the membranes to reduce ohmic resistances and improve performance. This new configuration, called a stacked microbial electro-deionization cell (SMEDIC), was compared to a control reactor (SMDC) lacking the resins. The SMEDIC+S reactors contained both a spacer and 1.4±0.2. mL of ion exchange resin (IER) per membrane channel, while the spacer was omitted in the SMEDIC-S reactors and so a larger volume of resin (2.4±0.2. mL) was used. The overall extent of desalination using the SMEDIC with a moderate (brackish water) salt concentration (13. g/L) was 90-94%, compared to only 60% for the SMDC after 7 fed-batch cycles of the anode. At a higher (seawater) salt concentration of 35. g/L, the extent of desalination reached 61-72% (after 10 cycles) for the SMEDIC, compared to 43% for the SMDC. The improved performance was shown to be due to the reduction in ohmic resistances, which were 130. Ω (SMEDIC-S) and 180. Ω (SMEDIC+S) at the high salt concentration, compared to 210. Ω without resin (SMDC). These results show that IERs can improve performance of stacked membranes for both moderate and high initial salt concentrations. © 2014 Elsevier B.V.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Water Desalination and Reuse Research Center (WDRC); Environmental Science and Engineering Program; Environmental Biotechnology Research Group
Publisher:
Elsevier BV
Journal:
Journal of Membrane Science
Issue Date:
Nov-2014
DOI:
10.1016/j.memsci.2014.06.058
Type:
Article
ISSN:
03767388
Sponsors:
This work was sponsored by a PhD fellowship, a Global Research Partnership-Collaborative Fellows Award (GRP-CF-2011-14-S), KAUST Award KUS-I1-003-13 and discretionary investigator funds at King Abdullah University of Science and Technology (KAUST), We would like to thank Dr. Fang Zhang, from Penn State University, for helping with analysis of the components of the internal resistances.
Appears in Collections:
Articles; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorChehab, Noura A.en
dc.contributor.authorAmy, Gary L.en
dc.contributor.authorLogan, Bruce E.en
dc.contributor.authorSaikaly, Pascalen
dc.date.accessioned2015-08-03T12:10:58Zen
dc.date.available2015-08-03T12:10:58Zen
dc.date.issued2014-11en
dc.identifier.issn03767388en
dc.identifier.doi10.1016/j.memsci.2014.06.058en
dc.identifier.urihttp://hdl.handle.net/10754/563811en
dc.description.abstractA microbial desalination cell was developed that contained a stack of membranes packed with ion exchange resins between the membranes to reduce ohmic resistances and improve performance. This new configuration, called a stacked microbial electro-deionization cell (SMEDIC), was compared to a control reactor (SMDC) lacking the resins. The SMEDIC+S reactors contained both a spacer and 1.4±0.2. mL of ion exchange resin (IER) per membrane channel, while the spacer was omitted in the SMEDIC-S reactors and so a larger volume of resin (2.4±0.2. mL) was used. The overall extent of desalination using the SMEDIC with a moderate (brackish water) salt concentration (13. g/L) was 90-94%, compared to only 60% for the SMDC after 7 fed-batch cycles of the anode. At a higher (seawater) salt concentration of 35. g/L, the extent of desalination reached 61-72% (after 10 cycles) for the SMEDIC, compared to 43% for the SMDC. The improved performance was shown to be due to the reduction in ohmic resistances, which were 130. Ω (SMEDIC-S) and 180. Ω (SMEDIC+S) at the high salt concentration, compared to 210. Ω without resin (SMDC). These results show that IERs can improve performance of stacked membranes for both moderate and high initial salt concentrations. © 2014 Elsevier B.V.en
dc.description.sponsorshipThis work was sponsored by a PhD fellowship, a Global Research Partnership-Collaborative Fellows Award (GRP-CF-2011-14-S), KAUST Award KUS-I1-003-13 and discretionary investigator funds at King Abdullah University of Science and Technology (KAUST), We would like to thank Dr. Fang Zhang, from Penn State University, for helping with analysis of the components of the internal resistances.en
dc.publisherElsevier BVen
dc.subjectBrackish water desalinationen
dc.subjectElectrodeionizationen
dc.subjectIon exchange resinen
dc.subjectMicrobial desalination cellen
dc.subjectSeawater desalinationen
dc.titleEnhanced water desalination efficiency in an air-cathode stacked microbial electrodeionization cell (SMEDIC)en
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.contributor.departmentEnvironmental Science and Engineering Programen
dc.contributor.departmentEnvironmental Biotechnology Research Groupen
dc.identifier.journalJournal of Membrane Scienceen
dc.contributor.institutionDepartment of Civil and Environmental Engineering, The Pennsylvania State University, 212 Sackett Building, University Park, PA 16802, United Statesen
kaust.authorChehab, Noura A.en
kaust.authorAmy, Gary L.en
kaust.authorSaikaly, Pascalen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.