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dc.contributor.authorMeulepas, Roel J W
dc.contributor.authorGonzalez-Gil, Graciela
dc.contributor.authorTeshager, Fitfety Melese
dc.contributor.authorWitharana, Ayoma
dc.contributor.authorSaikaly, Pascal
dc.contributor.authorLens, Piet Nl L
dc.date.accessioned2015-08-03T12:34:21Z
dc.date.available2015-08-03T12:34:21Z
dc.date.issued2015-05
dc.identifier.issn00489697
dc.identifier.pmid25659306
dc.identifier.doi10.1016/j.scitotenv.2014.12.073
dc.identifier.urihttp://hdl.handle.net/10754/564154
dc.description.abstractHeavy metal contamination of anaerobically digested waste activated sludge hampers its reuse as fertilizer or soil conditioner. Conventional methods to leach metals require aeration or the addition of leaching agents. This paper investigates whether metals can be leached from waste activated sludge during the first, acidifying stage of two-stage anaerobic digestion without the supply of leaching agents. These leaching experiments were done with waste activated sludge from the Hoek van Holland municipal wastewater treatment plant (The Netherlands), which contained 342μgg-1 of copper, 487μgg-1 of lead, 793μgg-1 of zinc, 27μgg-1 of nickel and 2.3μgg-1 of cadmium. During the anaerobic acidification of 3gdry weightL-1 waste activated sludge, 80-85% of the copper, 66-69% of the lead, 87% of the zinc, 94-99% of the nickel and 73-83% of the cadmium were leached. The first stage of two-stage anaerobic digestion can thus be optimized as an anaerobic bioleaching process and produce a treated sludge (i.e., digestate) that meets the land-use standards in The Netherlands for copper, zinc, nickel and cadmium, but not for lead.
dc.description.sponsorshipThis work was part of the SOWACOR project; award no. KUK-C1-017-12 of the King Abdullah University of Science and Technology (KAUST). This work was co-funded by NUFFIC (Netherlands Organization for International Cooperation in Higher Education) through the NFP (Netherlands Fellowship Programme) and by the DUPC (DGIS UNESCO-IHE Programmatic Cooperation).
dc.publisherElsevier BV
dc.subjectAnaerobic digestion
dc.subjectBioleaching
dc.subjectHeavy metals
dc.subjectMetal leaching
dc.subjectWaste activated sludge
dc.titleAnaerobic bioleaching of metals from waste activated sludge
dc.typeArticle
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentEnvironmental Biotechnology Research Group
dc.identifier.journalScience of The Total Environment
dc.contributor.institutionUNESCO-IHE, Westvest 7AX Delft, Netherlands
kaust.personSaikaly, Pascal
kaust.personGonzalez-Gil, Graciela


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