Effect of selenate and thiosulfate on anaerobic methanol degradation using activated sludge

Tejaswini Eregowda; Eldon R. Rene; Luck Matanhike; Piet N.L. Lens

doi:10.1007/s11356-020-07597-8

Effect of selenate and thiosulfate on anaerobic methanol degradation using activated sludge

Tejaswini Eregowda, Eldon R. Rene, Luck Matanhike, Piet N.L. Lens

Sustainable World

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Abstract

Anaerobic bioconversion of methanol was tested in the presence of selenate (SeO₄²⁻), thiosulfate (S₂O₃²⁻), and sulfate (SO₄²⁻) as electron acceptors. Complete SeO₄²⁻ reduction occurred at COD:SeO₄²⁻ ratios of 12 and 30, whereas ~ 83% reduction occurred when the COD:SeO₄²⁻ ratio was 6. Methane production did not occur at the three COD:SeO₄²⁻ ratios investigated. Up to 10.1 and 30.9% of S₂O₃²⁻ disproportionated to SO₄²⁻ at COD:S₂O₃²⁻ ratios of 1.2 and 2.25, respectively, and > 99% reduction was observed at both ratios. The presence of S₂O₃²⁻ lowered the methane production by 73.1% at a COD:S₂O₃²⁻ ratio of 1.2 compared to the control (no S₂O₃²⁻). This study showed that biogas production was not preferable for SeO₄²⁻ and S₂O₃²⁻-rich effluents and volatile fatty acid production could be a potential resource recovery option.

Original language	English
Pages (from-to)	29804-29811
Number of pages	8
Journal	Environmental Science and Pollution Research
Volume	27
Issue number	24
DOIs	https://doi.org/10.1007/s11356-020-07597-8
Publication status	Published - 1 Aug 2020

Keywords

Methylotrophy
Selenate reduction
Thiosulfate disproportionation
Thiosulfate reduction

Authors (Note for portal: view the doc link for the full list of authors)

Authors
Eregowda, T,Rene, ER,Matanhike, L,Lens, PNL

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10.1007/s11356-020-07597-8

Cite this

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title = "Effect of selenate and thiosulfate on anaerobic methanol degradation using activated sludge",

abstract = "Anaerobic bioconversion of methanol was tested in the presence of selenate (SeO42−), thiosulfate (S2O32−), and sulfate (SO42−) as electron acceptors. Complete SeO42− reduction occurred at COD:SeO42− ratios of 12 and 30, whereas \textasciitilde{} 83\% reduction occurred when the COD:SeO42− ratio was 6. Methane production did not occur at the three COD:SeO42− ratios investigated. Up to 10.1 and 30.9\% of S2O32− disproportionated to SO42− at COD:S2O32− ratios of 1.2 and 2.25, respectively, and > 99\% reduction was observed at both ratios. The presence of S2O32− lowered the methane production by 73.1\% at a COD:S2O32− ratio of 1.2 compared to the control (no S2O32−). This study showed that biogas production was not preferable for SeO42− and S2O32−-rich effluents and volatile fatty acid production could be a potential resource recovery option.",

keywords = "Methylotrophy, Selenate reduction, Thiosulfate disproportionation, Thiosulfate reduction",

author = "Tejaswini Eregowda and Rene, \{Eldon R.\} and Luck Matanhike and Lens, \{Piet N.L.\}",

note = "Publisher Copyright: {\textcopyright} 2020, Springer-Verlag GmbH Germany, part of Springer Nature.",

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T1 - Effect of selenate and thiosulfate on anaerobic methanol degradation using activated sludge

AU - Eregowda, Tejaswini

AU - Rene, Eldon R.

AU - Matanhike, Luck

AU - Lens, Piet N.L.

PY - 2020/8/1

Y1 - 2020/8/1

N2 - Anaerobic bioconversion of methanol was tested in the presence of selenate (SeO42−), thiosulfate (S2O32−), and sulfate (SO42−) as electron acceptors. Complete SeO42− reduction occurred at COD:SeO42− ratios of 12 and 30, whereas ~ 83% reduction occurred when the COD:SeO42− ratio was 6. Methane production did not occur at the three COD:SeO42− ratios investigated. Up to 10.1 and 30.9% of S2O32− disproportionated to SO42− at COD:S2O32− ratios of 1.2 and 2.25, respectively, and > 99% reduction was observed at both ratios. The presence of S2O32− lowered the methane production by 73.1% at a COD:S2O32− ratio of 1.2 compared to the control (no S2O32−). This study showed that biogas production was not preferable for SeO42− and S2O32−-rich effluents and volatile fatty acid production could be a potential resource recovery option.

AB - Anaerobic bioconversion of methanol was tested in the presence of selenate (SeO42−), thiosulfate (S2O32−), and sulfate (SO42−) as electron acceptors. Complete SeO42− reduction occurred at COD:SeO42− ratios of 12 and 30, whereas ~ 83% reduction occurred when the COD:SeO42− ratio was 6. Methane production did not occur at the three COD:SeO42− ratios investigated. Up to 10.1 and 30.9% of S2O32− disproportionated to SO42− at COD:S2O32− ratios of 1.2 and 2.25, respectively, and > 99% reduction was observed at both ratios. The presence of S2O32− lowered the methane production by 73.1% at a COD:S2O32− ratio of 1.2 compared to the control (no S2O32−). This study showed that biogas production was not preferable for SeO42− and S2O32−-rich effluents and volatile fatty acid production could be a potential resource recovery option.

KW - Methylotrophy

KW - Selenate reduction

KW - Thiosulfate disproportionation

KW - Thiosulfate reduction

UR - https://www.scopus.com/pages/publications/85078211337

U2 - 10.1007/s11356-020-07597-8

DO - 10.1007/s11356-020-07597-8

M3 - Article

SN - 0944-1344

VL - 27

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EP - 29811

JO - Environmental Science and Pollution Research

JF - Environmental Science and Pollution Research

IS - 24

ER -