Effect of carbon source and metal toxicity for potential acid mine drainage (AMD) treatment with an anaerobic sludge using sulfate-reduction

This study compares sulfate-reduction performance in an anaerobic sludge with different carbon sources (ethanol, acetate, and glucose). Also, the toxic effect of copper was evaluated to assess its feasibility for possible acid mine drainage (AMD) treatment. Serological bottles with 1.5 g VSS/L and 1...

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Autores principales:	C. D. Loreto, O. Monge, A. R. Martin, V. Ochoa-Herrera, R. Sierra-Alvarez, F. J. Almendariz
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	electron donors heavy metals inhibitory concentration microbial competition percentage of electron equivalents sulfate-reduction Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/6b0c741372e444588d5fc90357ac58ed
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spelling	oai:doaj.org-article:6b0c741372e444588d5fc90357ac58ed2021-11-06T11:07:31ZEffect of carbon source and metal toxicity for potential acid mine drainage (AMD) treatment with an anaerobic sludge using sulfate-reduction0273-12231996-973210.2166/wst.2021.163https://doaj.org/article/6b0c741372e444588d5fc90357ac58ed2021-06-01T00:00:00Zhttp://wst.iwaponline.com/content/83/11/2669https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732This study compares sulfate-reduction performance in an anaerobic sludge with different carbon sources (ethanol, acetate, and glucose). Also, the toxic effect of copper was evaluated to assess its feasibility for possible acid mine drainage (AMD) treatment. Serological bottles with 1.5 g VSS/L and 150 mL of basal medium (0.67 g COD/g SO42− at a 7–8 pH) were used to determine the percentage of electron equivalents, maximum specific methanogenic (SMA), and sulfide generation activities (SGA). The copper effect was evaluated in a previously activated sludge in batch bioassays containing different concentrations of copper (0–50 mg/L), 3 gVSS/L, and 150 mL of basal medium (0.67 g COD/g SO42−). Carbon source bioassays with glucose obtained the best results in terms of the SGA (1.73 ± 0.34 mg S2−/g VSS•d) and SMA (10.41 mg COD-CH4/g VSS•d). The electron flow in the presence of glucose also indicated that 21.29 ± 5.2% of the metabolic activity of the sludge was directed towards sulfidogenesis. Copper toxicity bioassays indicated that a considerable decline in metabolic activity occurs above 10 mg/L. The 20%IC, 50%IC, and 80%IC were 4.5, 14.94, and 35.31 mg Cu/L. Compared to the other carbon sources tested, glucose proved to be a suitable electron donor since it favors sulfidogenesis. Finally, copper concentrations above 15 mg/L inhibited metabolic activity in the toxicity bioassays. HIGHLIGHTS The influence of organic matter degradation and copper toxicity was assessed.; Potential application of sulfate reducing bacteria (SRB) for acid mine drainage treatment was evaluated.; The highest sulfidogenic activity was observed with glucose as carbon source.; High copper concentration impacts sulfate removal and sulfide production.;C. D. LoretoO. MongeA. R. MartinV. Ochoa-HerreraR. Sierra-AlvarezF. J. AlmendarizIWA Publishingarticleelectron donorsheavy metalsinhibitory concentrationmicrobial competitionpercentage of electron equivalentssulfate-reductionEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 11, Pp 2669-2677 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	electron donors heavy metals inhibitory concentration microbial competition percentage of electron equivalents sulfate-reduction Environmental technology. Sanitary engineering TD1-1066
spellingShingle	electron donors heavy metals inhibitory concentration microbial competition percentage of electron equivalents sulfate-reduction Environmental technology. Sanitary engineering TD1-1066 C. D. Loreto O. Monge A. R. Martin V. Ochoa-Herrera R. Sierra-Alvarez F. J. Almendariz Effect of carbon source and metal toxicity for potential acid mine drainage (AMD) treatment with an anaerobic sludge using sulfate-reduction
description	This study compares sulfate-reduction performance in an anaerobic sludge with different carbon sources (ethanol, acetate, and glucose). Also, the toxic effect of copper was evaluated to assess its feasibility for possible acid mine drainage (AMD) treatment. Serological bottles with 1.5 g VSS/L and 150 mL of basal medium (0.67 g COD/g SO42− at a 7–8 pH) were used to determine the percentage of electron equivalents, maximum specific methanogenic (SMA), and sulfide generation activities (SGA). The copper effect was evaluated in a previously activated sludge in batch bioassays containing different concentrations of copper (0–50 mg/L), 3 gVSS/L, and 150 mL of basal medium (0.67 g COD/g SO42−). Carbon source bioassays with glucose obtained the best results in terms of the SGA (1.73 ± 0.34 mg S2−/g VSS•d) and SMA (10.41 mg COD-CH4/g VSS•d). The electron flow in the presence of glucose also indicated that 21.29 ± 5.2% of the metabolic activity of the sludge was directed towards sulfidogenesis. Copper toxicity bioassays indicated that a considerable decline in metabolic activity occurs above 10 mg/L. The 20%IC, 50%IC, and 80%IC were 4.5, 14.94, and 35.31 mg Cu/L. Compared to the other carbon sources tested, glucose proved to be a suitable electron donor since it favors sulfidogenesis. Finally, copper concentrations above 15 mg/L inhibited metabolic activity in the toxicity bioassays. HIGHLIGHTS The influence of organic matter degradation and copper toxicity was assessed.; Potential application of sulfate reducing bacteria (SRB) for acid mine drainage treatment was evaluated.; The highest sulfidogenic activity was observed with glucose as carbon source.; High copper concentration impacts sulfate removal and sulfide production.;
format	article
author	C. D. Loreto O. Monge A. R. Martin V. Ochoa-Herrera R. Sierra-Alvarez F. J. Almendariz
author_facet	C. D. Loreto O. Monge A. R. Martin V. Ochoa-Herrera R. Sierra-Alvarez F. J. Almendariz
author_sort	C. D. Loreto
title	Effect of carbon source and metal toxicity for potential acid mine drainage (AMD) treatment with an anaerobic sludge using sulfate-reduction
title_short	Effect of carbon source and metal toxicity for potential acid mine drainage (AMD) treatment with an anaerobic sludge using sulfate-reduction
title_full	Effect of carbon source and metal toxicity for potential acid mine drainage (AMD) treatment with an anaerobic sludge using sulfate-reduction
title_fullStr	Effect of carbon source and metal toxicity for potential acid mine drainage (AMD) treatment with an anaerobic sludge using sulfate-reduction
title_full_unstemmed	Effect of carbon source and metal toxicity for potential acid mine drainage (AMD) treatment with an anaerobic sludge using sulfate-reduction
title_sort	effect of carbon source and metal toxicity for potential acid mine drainage (amd) treatment with an anaerobic sludge using sulfate-reduction
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/6b0c741372e444588d5fc90357ac58ed
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Effect of carbon source and metal toxicity for potential acid mine drainage (AMD) treatment with an anaerobic sludge using sulfate-reduction

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