Anaerobic bioleaching of metals from waste activated sludge

Handle URI:
http://hdl.handle.net/10754/564154
Title:
Anaerobic bioleaching of metals from waste activated sludge
Authors:
Meulepas, Roel J W; Gonzalez-Gil, Graciela; Teshager, Fitfety Melese; Witharana, Ayoma; Saikaly, Pascal ( 0000-0001-7678-3986 ) ; Lens, Piet Nl L
Abstract:
Heavy 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.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division; Environmental Science and Engineering Program; Environmental Biotechnology Research Group
Publisher:
Elsevier BV
Journal:
Science of The Total Environment
Issue Date:
May-2015
DOI:
10.1016/j.scitotenv.2014.12.073
Type:
Article
ISSN:
00489697
Sponsors:
This 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).
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.authorMeulepas, Roel J Wen
dc.contributor.authorGonzalez-Gil, Gracielaen
dc.contributor.authorTeshager, Fitfety Meleseen
dc.contributor.authorWitharana, Ayomaen
dc.contributor.authorSaikaly, Pascalen
dc.contributor.authorLens, Piet Nl Len
dc.date.accessioned2015-08-03T12:34:21Zen
dc.date.available2015-08-03T12:34:21Zen
dc.date.issued2015-05en
dc.identifier.issn00489697en
dc.identifier.doi10.1016/j.scitotenv.2014.12.073en
dc.identifier.urihttp://hdl.handle.net/10754/564154en
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.en
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).en
dc.publisherElsevier BVen
dc.subjectAnaerobic digestionen
dc.subjectBioleachingen
dc.subjectHeavy metalsen
dc.subjectMetal leachingen
dc.subjectWaste activated sludgeen
dc.titleAnaerobic bioleaching of metals from waste activated sludgeen
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.departmentEnvironmental Biotechnology Research Groupen
dc.identifier.journalScience of The Total Environmenten
dc.contributor.institutionUNESCO-IHE, Westvest 7AX Delft, Netherlandsen
kaust.authorSaikaly, Pascalen
kaust.authorGonzalez-Gil, Gracielaen
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