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High rate production of concentrated sulfides from metal bearing wastewater in an expanded bed hydrogenotrophic sulfate reducing bioreactor

dc.contributor.authorOSTERMEYER, Pieter
dc.contributor.authorVAN LANDUYT, Josefien
dc.contributor.authorBONIN, Luiza
dc.contributor.authorFOLENS, Karel
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorWILLIAMSON, Adam
dc.contributor.authorHENNEBEL, Tom
dc.contributor.authorRABAEY, Korneel
dc.date.accessioned2023-11-20T16:50:52Z
dc.date.available2023-11-20T16:50:52Z
dc.date.issued2022
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/185073
dc.description.abstractEnMetallurgical wastewaters contain high concentrations of sulfate, up to 15 g L−1. Sulfate-reducing bioreactors are employed to treat these wastewaters, reducing sulfates to sulfides which subsequently co-precipitate metals. Sulfate loading and reduction rates are typically restricted by the total H2S concentration. Sulfide stripping, sulfide precipitation and dilution are the main strategies employed to minimize inhibition by H2S, but can be adversely compromised by suboptimal sulfate reduction, clogging and additional energy costs. Here, metallurgical wastewater was treated for over 250 days using two hydrogenotrophic granular activated carbon expanded bed bioreactors without additional removal of sulfides. H2S toxicity was minimized by operating at pH 8 ± 0.15, resulting in an average sulfate removal of 7.08 ± 0.08 g L−1, sulfide concentrations of 2.1 ± 0.2 g L−1 and peaks up to 2.3 ± 0.2 g L−1. A sulfate reduction rate of 20.6 ± 0.9 g L−1 d−1 was achieved, with maxima up to 27.2 g L−1 d−1, which is among the highest reported considering a literature review of 39 studies. The rates reported here are 6–8 times higher than those reported for other reactors without active sulfide removal and the only reported for expanded bed sulfate-reducing bioreactors using H2. By increasing the influent sulfate concentration and maintaining high sulfide concentrations, sulfate reducers were promoted while fermenters and methanogens were suppressed. Industrial wastewater containing 4.4 g L−1 sulfate, 0.036 g L−1 nitrate and various metals (As, Fe, Tl, Zn, Ni, Sb, Co and Cd) was successfully treated with all metal(loid)s, nitrates and sulfates removed below discharge limits.
dc.language.isoen
dc.title.enHigh rate production of concentrated sulfides from metal bearing wastewater in an expanded bed hydrogenotrophic sulfate reducing bioreactor
dc.typeArticle de revue
dc.identifier.doi10.1016/j.ese.2022.100173
dc.subject.halPhysique [physics]
bordeaux.journalEnvironmental Science and Ecotechnology
bordeaux.page100173
bordeaux.volume11
bordeaux.hal.laboratoriesCentre d'Études Nucléaires de Bordeaux Gradignan (CENBG)*
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionCNRS
bordeaux.peerReviewedoui
hal.identifierhal-03668875
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03668875v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Environmental%20Science%20and%20Ecotechnology&rft.date=2022&rft.volume=11&rft.spage=100173&rft.epage=100173&rft.au=OSTERMEYER,%20Pieter&VAN%20LANDUYT,%20Josefien&BONIN,%20Luiza&FOLENS,%20Karel&WILLIAMSON,%20Adam&rft.genre=article


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