Attenuation of trace organic compounds (TOrCs) inbioelectrochemical systems

Handle URI:
http://hdl.handle.net/10754/564118
Title:
Attenuation of trace organic compounds (TOrCs) inbioelectrochemical systems
Authors:
Werner, Craig M.; Hoppe-Jones, Christiane; Saikaly, Pascal ( 0000-0001-7678-3986 ) ; Logan, Bruce E.; Amy, Gary L.
Abstract:
Microbial 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.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division; Environmental Science and Engineering Program; Water Desalination & Reuse Research Cntr; Environmental Biotechnology Research Group
Publisher:
Elsevier BV
Journal:
Water Research
Issue Date:
Apr-2015
DOI:
10.1016/j.watres.2015.01.013
Type:
Article
ISSN:
00431354
Sponsors:
This 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.
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.authorWerner, Craig M.en
dc.contributor.authorHoppe-Jones, Christianeen
dc.contributor.authorSaikaly, Pascalen
dc.contributor.authorLogan, Bruce E.en
dc.contributor.authorAmy, Gary L.en
dc.date.accessioned2015-08-03T12:32:57Zen
dc.date.available2015-08-03T12:32:57Zen
dc.date.issued2015-04en
dc.identifier.issn00431354en
dc.identifier.doi10.1016/j.watres.2015.01.013en
dc.identifier.urihttp://hdl.handle.net/10754/564118en
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.en
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.en
dc.publisherElsevier BVen
dc.subjectBioelectrochemical systemsen
dc.subjectBiotransformationen
dc.subjectSorptionen
dc.subjectTrace organic compoundsen
dc.titleAttenuation of trace organic compounds (TOrCs) inbioelectrochemical systemsen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentEnvironmental Science and Engineering Programen
dc.contributor.departmentWater Desalination & Reuse Research Cntren
dc.contributor.departmentEnvironmental Biotechnology Research Groupen
dc.identifier.journalWater Researchen
dc.contributor.institutionDepartment of Civil and Environmental Engineering, Pennsylvania State UniversityUniversity Park, PA, United Statesen
kaust.authorWerner, Craig M.en
kaust.authorHoppe-Jones, Christianeen
kaust.authorSaikaly, Pascalen
kaust.authorAmy, Gary L.en
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