Simultaneous removal of organic matter and salt ions from saline wastewater in bioelectrochemical systems

Handle URI:
http://hdl.handle.net/10754/599630
Title:
Simultaneous removal of organic matter and salt ions from saline wastewater in bioelectrochemical systems
Authors:
Kim, Younggy; Logan, Bruce E.
Abstract:
A new bioelectrochemical system is proposed for simultaneous removal of salinity and organic matter. In this process, exoelectrogenic microorganisms oxidize organic matter and transfer electrons to the anode, hydrogen is evolved at the cathode by supplying additional voltage, and salt is removed from the wastewater due to the electric potential generated and the use of two ion-exchange membranes. Salinity removal (initial conductivity ~40mS/cm) increased from 21 to 84% by increasing the substrate (sodium acetate) from 2 to 8g/L. A total of 72-94% of the chemical oxygen demand was degraded in the anode and cathode chambers, with 1-4% left in the anode chamber and the balance lost through the anion-exchange membrane into the concentrate waste chamber. The maximum hydrogen production rate was 3.6m3-H2/m3-electrolyte per day at an applied potential of 1.2V. The Coulombic efficiency was ~100%, while the cathode recovery varied from 57 to 100%, depending on the extent of methanogenesis. Exoelectrogenic microbes generated high current densities (7.8mA/cm2) at ≤36g/L of total dissolved solids, but >41g/L eliminated current. These results provide a new method for achieving simultaneous removal of salinity and organic matter from a saline wastewater with H2 production. © 2012 Elsevier B.V.
Citation:
Kim Y, Logan BE (2013) Simultaneous removal of organic matter and salt ions from saline wastewater in bioelectrochemical systems. Desalination 308: 115–121. Available: http://dx.doi.org/10.1016/j.desal.2012.07.031.
Publisher:
Elsevier BV
Journal:
Desalination
KAUST Grant Number:
KUS-I1-003-13
Issue Date:
Jan-2013
DOI:
10.1016/j.desal.2012.07.031
Type:
Article
ISSN:
0011-9164
Sponsors:
This research was supported by funding through the King Abdullah University of Science and Technology (KAUST) (Award KUS-I1-003-13).
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorKim, Younggyen
dc.contributor.authorLogan, Bruce E.en
dc.date.accessioned2016-02-28T06:06:13Zen
dc.date.available2016-02-28T06:06:13Zen
dc.date.issued2013-01en
dc.identifier.citationKim Y, Logan BE (2013) Simultaneous removal of organic matter and salt ions from saline wastewater in bioelectrochemical systems. Desalination 308: 115–121. Available: http://dx.doi.org/10.1016/j.desal.2012.07.031.en
dc.identifier.issn0011-9164en
dc.identifier.doi10.1016/j.desal.2012.07.031en
dc.identifier.urihttp://hdl.handle.net/10754/599630en
dc.description.abstractA new bioelectrochemical system is proposed for simultaneous removal of salinity and organic matter. In this process, exoelectrogenic microorganisms oxidize organic matter and transfer electrons to the anode, hydrogen is evolved at the cathode by supplying additional voltage, and salt is removed from the wastewater due to the electric potential generated and the use of two ion-exchange membranes. Salinity removal (initial conductivity ~40mS/cm) increased from 21 to 84% by increasing the substrate (sodium acetate) from 2 to 8g/L. A total of 72-94% of the chemical oxygen demand was degraded in the anode and cathode chambers, with 1-4% left in the anode chamber and the balance lost through the anion-exchange membrane into the concentrate waste chamber. The maximum hydrogen production rate was 3.6m3-H2/m3-electrolyte per day at an applied potential of 1.2V. The Coulombic efficiency was ~100%, while the cathode recovery varied from 57 to 100%, depending on the extent of methanogenesis. Exoelectrogenic microbes generated high current densities (7.8mA/cm2) at ≤36g/L of total dissolved solids, but >41g/L eliminated current. These results provide a new method for achieving simultaneous removal of salinity and organic matter from a saline wastewater with H2 production. © 2012 Elsevier B.V.en
dc.description.sponsorshipThis research was supported by funding through the King Abdullah University of Science and Technology (KAUST) (Award KUS-I1-003-13).en
dc.publisherElsevier BVen
dc.subjectBioelectrochemical systemsen
dc.subjectIon-exchange membranesen
dc.subjectIonic separationen
dc.subjectMicrobial electrolysis cellsen
dc.subjectSaline wastewateren
dc.titleSimultaneous removal of organic matter and salt ions from saline wastewater in bioelectrochemical systemsen
dc.typeArticleen
dc.identifier.journalDesalinationen
dc.contributor.institutionPennsylvania State University, State College, United Statesen
dc.contributor.institutionMcMaster University, Hamilton, Canadaen
kaust.grant.numberKUS-I1-003-13en
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