Leaching and accumulation of trace elements in sulfate reducing granular sludge under concomitant thermophilic and low pH conditions

Handle URI:
http://hdl.handle.net/10754/565989
Title:
Leaching and accumulation of trace elements in sulfate reducing granular sludge under concomitant thermophilic and low pH conditions
Authors:
Gonzalez-Gil, Graciela; Lopes, Sílvia I C; Saikaly, Pascal ( 0000-0001-7678-3986 ) ; Lens, Piet Nl L
Abstract:
The leaching and/or accumulation of trace elements in sulfate reducing granular sludge systems was investigated. Two thermophilic up-flow anaerobic sludge bed (UASB) reactors operated at pH 5 were fed with sucrose (4gCODl reactor -1d -1) and sulfate at different COD/SO 4 2- ratios. During the start-up of such acidogenic systems, an initial leaching of trace elements from the inoculum sludge occurred regardless of trace elements supplementation in the reactor influent. The granular sludge maintained the physical structure despite high Fe leaching. After start-up and nonetheless the acidic conditions, Co, Ni, Cu, Zn, Mo and Se were retained or accumulated by the sludge when added. Particularly, Ni and Co accumulated in the carbonates and exchangeable fractions ensuring potential bioavailability. Otherwise, the initial stock in the inoculum sludge sufficed to operate the process for nearly 1year without supplementation of trace elements and no significant sludge wash-out occurred. © 2012 Elsevier Ltd.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC)
Publisher:
Elsevier BV
Journal:
Bioresource Technology
Issue Date:
Dec-2012
DOI:
10.1016/j.biortech.2012.09.044
PubMed ID:
23073114
Type:
Article
ISSN:
09608524
Sponsors:
This work was partially funded by a Ph.D. grant from the Fundacao para a Ciencia e Tecnologia, Portugal (SFRH/BD/9268/2002) and by a Global Collaborative Research award from King Abdullah University of Science and Technology, Saudi Arabia (GRP-CF-2011-13-P). We thank Ricardo Sampaio for contributing to the operation of the bioreactors.
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorGonzalez-Gil, Gracielaen
dc.contributor.authorLopes, Sílvia I Cen
dc.contributor.authorSaikaly, Pascalen
dc.contributor.authorLens, Piet Nl Len
dc.date.accessioned2015-08-12T08:58:21Zen
dc.date.available2015-08-12T08:58:21Zen
dc.date.issued2012-12en
dc.identifier.issn09608524en
dc.identifier.pmid23073114en
dc.identifier.doi10.1016/j.biortech.2012.09.044en
dc.identifier.urihttp://hdl.handle.net/10754/565989en
dc.description.abstractThe leaching and/or accumulation of trace elements in sulfate reducing granular sludge systems was investigated. Two thermophilic up-flow anaerobic sludge bed (UASB) reactors operated at pH 5 were fed with sucrose (4gCODl reactor -1d -1) and sulfate at different COD/SO 4 2- ratios. During the start-up of such acidogenic systems, an initial leaching of trace elements from the inoculum sludge occurred regardless of trace elements supplementation in the reactor influent. The granular sludge maintained the physical structure despite high Fe leaching. After start-up and nonetheless the acidic conditions, Co, Ni, Cu, Zn, Mo and Se were retained or accumulated by the sludge when added. Particularly, Ni and Co accumulated in the carbonates and exchangeable fractions ensuring potential bioavailability. Otherwise, the initial stock in the inoculum sludge sufficed to operate the process for nearly 1year without supplementation of trace elements and no significant sludge wash-out occurred. © 2012 Elsevier Ltd.en
dc.description.sponsorshipThis work was partially funded by a Ph.D. grant from the Fundacao para a Ciencia e Tecnologia, Portugal (SFRH/BD/9268/2002) and by a Global Collaborative Research award from King Abdullah University of Science and Technology, Saudi Arabia (GRP-CF-2011-13-P). We thank Ricardo Sampaio for contributing to the operation of the bioreactors.en
dc.publisherElsevier BVen
dc.subjectAcidogenesisen
dc.subjectAnaerobic granuleen
dc.subjectSulfate reductionen
dc.subjectThermophilicen
dc.subjectTrace metalsen
dc.titleLeaching and accumulation of trace elements in sulfate reducing granular sludge under concomitant thermophilic and low pH conditionsen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.identifier.journalBioresource Technologyen
dc.contributor.institutionPollution Prevention and Control Core, UNESCO-IHE, Westvest 7, 2611 AX Delft, The Netherlandsen
dc.contributor.institutionSub-department of Environmental Technology, Wageningen University Biotechnion, Bomenweg 2, P.O. Box 8129, 6700 EV Wageningen, The Netherlandsen
kaust.authorSaikaly, Pascalen
kaust.authorGonzalez-Gil, Gracielaen

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