Effect of Carbon Sources on Pyrite-Arsenopyrite Concentrate Bio-oxidation and Growth of Microbial Population in Stirred Tank Reactors

Tank bio-oxidation is a biohydrometallurgical technology widely used for metal recovery from sulfide concentrates. Since carbon availability is one of the key factors affecting microbial communities, it may also determine the rate of sulfide concentrate bio-oxidation. The goal of the present work wa...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Aleksandr Bulaev, Aleksandra Nechaeva, Yuliya Elkina, Vitaliy Melamud
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	biohydrometallurgy acidophilic microorganisms pyrite arsenopyrite sulfide concentrates carbon dioxide Biology (General) QH301-705.5
Acceso en línea:	https://doaj.org/article/419749b9fb8a45fe8b23792e3a6a1f3b
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:419749b9fb8a45fe8b23792e3a6a1f3b
record_format	dspace
spelling	oai:doaj.org-article:419749b9fb8a45fe8b23792e3a6a1f3b2021-11-25T18:25:21ZEffect of Carbon Sources on Pyrite-Arsenopyrite Concentrate Bio-oxidation and Growth of Microbial Population in Stirred Tank Reactors10.3390/microorganisms91123502076-2607https://doaj.org/article/419749b9fb8a45fe8b23792e3a6a1f3b2021-11-01T00:00:00Zhttps://www.mdpi.com/2076-2607/9/11/2350https://doaj.org/toc/2076-2607Tank bio-oxidation is a biohydrometallurgical technology widely used for metal recovery from sulfide concentrates. Since carbon availability is one of the key factors affecting microbial communities, it may also determine the rate of sulfide concentrate bio-oxidation. The goal of the present work was to evaluate the effect of carbon sources on the bio-oxidation of the concentrate containing 56% pyrite and 14% arsenopyrite at different temperatures (40 and 50 °C) in stirred tank reactors. CO<sub>2</sub> was supplied into the pulp of the first reactor (about 0.01 L/min) and 0.02% (<i>w/v</i>) molasses was added to the pulp of the second one, and no additional carbon sources were used in the control tests. At 40 °C, 77% of pyrite and 98% of arsenopyrite were oxidized in the first reactor, in the second one, 73% of pyrite and 98% of arsenopyrite were oxidized, while in the control reactor, 27% pyrite and 93% arsenopyrite were oxidized. At 50 °C, in the first reactor, 94% of pyrite and 99% of arsenopyrite were oxidized, in the second one, 21% of pyrite and 94% of arsenopyrite were oxidized, while in the control reactor, 10% pyrite and 92% arsenopyrite were oxidized. The analysis of the microbial populations in the reactors revealed differences in the total number of microorganisms and their species composition. Thus, it was shown that the use of various carbon sources made it possible to increase the intensity of the concentrate bio-oxidation, since it affected microbial populations performing the process.Aleksandr BulaevAleksandra NechaevaYuliya ElkinaVitaliy MelamudMDPI AGarticlebiohydrometallurgyacidophilic microorganismspyritearsenopyritesulfide concentratescarbon dioxideBiology (General)QH301-705.5ENMicroorganisms, Vol 9, Iss 2350, p 2350 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	biohydrometallurgy acidophilic microorganisms pyrite arsenopyrite sulfide concentrates carbon dioxide Biology (General) QH301-705.5
spellingShingle	biohydrometallurgy acidophilic microorganisms pyrite arsenopyrite sulfide concentrates carbon dioxide Biology (General) QH301-705.5 Aleksandr Bulaev Aleksandra Nechaeva Yuliya Elkina Vitaliy Melamud Effect of Carbon Sources on Pyrite-Arsenopyrite Concentrate Bio-oxidation and Growth of Microbial Population in Stirred Tank Reactors
description	Tank bio-oxidation is a biohydrometallurgical technology widely used for metal recovery from sulfide concentrates. Since carbon availability is one of the key factors affecting microbial communities, it may also determine the rate of sulfide concentrate bio-oxidation. The goal of the present work was to evaluate the effect of carbon sources on the bio-oxidation of the concentrate containing 56% pyrite and 14% arsenopyrite at different temperatures (40 and 50 °C) in stirred tank reactors. CO<sub>2</sub> was supplied into the pulp of the first reactor (about 0.01 L/min) and 0.02% (<i>w/v</i>) molasses was added to the pulp of the second one, and no additional carbon sources were used in the control tests. At 40 °C, 77% of pyrite and 98% of arsenopyrite were oxidized in the first reactor, in the second one, 73% of pyrite and 98% of arsenopyrite were oxidized, while in the control reactor, 27% pyrite and 93% arsenopyrite were oxidized. At 50 °C, in the first reactor, 94% of pyrite and 99% of arsenopyrite were oxidized, in the second one, 21% of pyrite and 94% of arsenopyrite were oxidized, while in the control reactor, 10% pyrite and 92% arsenopyrite were oxidized. The analysis of the microbial populations in the reactors revealed differences in the total number of microorganisms and their species composition. Thus, it was shown that the use of various carbon sources made it possible to increase the intensity of the concentrate bio-oxidation, since it affected microbial populations performing the process.
format	article
author	Aleksandr Bulaev Aleksandra Nechaeva Yuliya Elkina Vitaliy Melamud
author_facet	Aleksandr Bulaev Aleksandra Nechaeva Yuliya Elkina Vitaliy Melamud
author_sort	Aleksandr Bulaev
title	Effect of Carbon Sources on Pyrite-Arsenopyrite Concentrate Bio-oxidation and Growth of Microbial Population in Stirred Tank Reactors
title_short	Effect of Carbon Sources on Pyrite-Arsenopyrite Concentrate Bio-oxidation and Growth of Microbial Population in Stirred Tank Reactors
title_full	Effect of Carbon Sources on Pyrite-Arsenopyrite Concentrate Bio-oxidation and Growth of Microbial Population in Stirred Tank Reactors
title_fullStr	Effect of Carbon Sources on Pyrite-Arsenopyrite Concentrate Bio-oxidation and Growth of Microbial Population in Stirred Tank Reactors
title_full_unstemmed	Effect of Carbon Sources on Pyrite-Arsenopyrite Concentrate Bio-oxidation and Growth of Microbial Population in Stirred Tank Reactors
title_sort	effect of carbon sources on pyrite-arsenopyrite concentrate bio-oxidation and growth of microbial population in stirred tank reactors
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/419749b9fb8a45fe8b23792e3a6a1f3b
work_keys_str_mv	AT aleksandrbulaev effectofcarbonsourcesonpyritearsenopyriteconcentratebiooxidationandgrowthofmicrobialpopulationinstirredtankreactors AT aleksandranechaeva effectofcarbonsourcesonpyritearsenopyriteconcentratebiooxidationandgrowthofmicrobialpopulationinstirredtankreactors AT yuliyaelkina effectofcarbonsourcesonpyritearsenopyriteconcentratebiooxidationandgrowthofmicrobialpopulationinstirredtankreactors AT vitaliymelamud effectofcarbonsourcesonpyritearsenopyriteconcentratebiooxidationandgrowthofmicrobialpopulationinstirredtankreactors
_version_	1718411190104752128

Effect of Carbon Sources on Pyrite-Arsenopyrite Concentrate Bio-oxidation and Growth of Microbial Population in Stirred Tank Reactors

Ejemplares similares