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dc.contributor.authorWerner, Craig M.
dc.contributor.authorHoppe-Jones, Christiane
dc.contributor.authorSaikaly, Pascal
dc.contributor.authorLogan, Bruce E.
dc.contributor.authorAmy, Gary L.
dc.date.accessioned2015-08-03T12:32:57Z
dc.date.available2015-08-03T12:32:57Z
dc.date.issued2015-04
dc.identifier.issn00431354
dc.identifier.pmid25644628
dc.identifier.doi10.1016/j.watres.2015.01.013
dc.identifier.urihttp://hdl.handle.net/10754/564118
dc.description.abstractMicrobial fuel cells (MFCs) and microbial electrolysis cells (MECs) are two types of microbial bioelectrochemical systems (BESs) that use microorganisms to convert chemical energy in wastewaters into useful energy products such as (bio)electricity (MFC) or hydrogen gas (MEC). These two systems were evaluated for their capacity to attenuate trace organic compounds (TOrCs), commonly found in municipal wastewater, under closed circuit (current generation) and open circuit (no current generation) conditions, using acetate as the carbon source. A biocide was used to evaluate attenuation in terms of biotransformation versus sorption. The difference in attenuation observed before and after addition of the biocide represented biotransformation, while attenuation after addition of a biocide primarily indicated sorption. Attenuation of TOrCs was similar in MFCs and MECs for eight different TOrCs, except for caffeine and trimethoprim where slightly higher attenuation was observed in MECs. Electric current generation did not enhance attenuation of the TOrCs except for caffeine, which showed slightly higher attenuation under closed circuit conditions in both MFCs and MECs. Substantial sorption of the TOrCs occurred to the biofilm-covered electrodes, but no consistent trend could be identified regarding the physico-chemical properties of the TOrCs tested and the extent of sorption. The octanol-water distribution coefficient at pH 7.4 (log DpH 7.4) appeared to be a reasonable predictor for sorption of some of the compounds (carbamazepine, atrazine, tris(2-chloroethyl) phosphate and diphenhydramine) but not for others (N,N-Diethyl-meta-toluamide). Atenolol also showed high levels of sorption despite being the most hydrophilic in the suite of compounds studied (log DpH 7.4=-1.99). Though BESs do not show any inherent advantages over conventional wastewater treatment, with respect to TOrC removal, overall removals in BESs are similar to that reported for conventional wastewater systems, implying the possibility of using BESs for energy production in wastewater treatment without adversely impacting TOrC attenuations.
dc.description.sponsorshipThis work was supported by a PhD fellowship award (C.W.), discretionary investigator funds (P.S.) from the King Abdullah University of Science and Technology (KAUST), and Award KUS-I1-003-13 from KAUST.
dc.publisherElsevier BV
dc.subjectBioelectrochemical systems
dc.subjectBiotransformation
dc.subjectSorption
dc.subjectTrace organic compounds
dc.titleAttenuation of trace organic compounds (TOrCs) inbioelectrochemical systems
dc.typeArticle
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentEnvironmental Biotechnology Research Group
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentOffice of the VP
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.identifier.journalWater Research
dc.contributor.institutionDepartment of Civil and Environmental Engineering, Pennsylvania State UniversityUniversity Park, PA, United States
kaust.personWerner, Craig M.
kaust.personHoppe-Jones, Christiane
kaust.personSaikaly, Pascal
kaust.personAmy, Gary L.
kaust.grant.numberKUS-I1-003-13


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