Sulfobacillus harzensis sp. nov., an acidophilic bacterium inhabiting mine tailings from a polymetallic mine

Zhang, Ruiyong; Hedrich, Sabrina; Jin, Decai; Breuker, Anja; Schippers, Axel

doi:10.1099/ijsem.0.004871

Cited by 13 publications

(5 citation statements)

References 56 publications

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“…are ~30°C and 45°C, respectively (Mirete et al, 2017); Sulfobacillus sp. are moderate thermophiles with optimum growth temperatures of 38-55°C (Norris et al, 1996;Melamud et al, 2003;Bogdanova et al, 2006;Johnson et al, 2008;Zhang et al, 2021). Acidithiobacillus spp.…”

Section: Microbial Community Compositionmentioning

confidence: 99%

Nutrient optimization in bioleaching: are we overdosing?

Falagán,

Sbaffi,

Williams

et al. 2024

Front. Microbiol.

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The general trend in biomining (i.e., bioleaching and biooxidation) is the use of media with high concentrations of the nutrients (nitrogen as ammonium, phosphorous as phosphate, and K), which are considered to be essential for microbial growth. The depletion of any of the nutrients would affect negatively the bioleaching (and biooxidation) capacity of the microorganisms, so the formulation of the different media ensures that there is a surplus of nutrients. However, some of these nutrients (e.g., phosphate, K) may be already present in the ore and are made available to the microorganisms when the ore is exposed to the low-pH media used during bioleaching. The effect of phosphate addition (109 mg/L) and depletion on the bioleaching of low-grade sulfidic ore alongside the determination of ammonium (i.e., 25 mg/L, 50 mg/L, 109 mg/L, 409 mg/L, and 874 g/L) requirements were studied. The results of the experiments presented showed that the addition of phosphate did not have any effect on the bioleaching of the low-grade sulfidic ore while the addition of ammonium was necessary to obtain higher redox potentials (>650 mV vs. Ag/AgCl) and higher metal (Co, Cu, Ni, and Zn) dissolutions. Temperature was the factor that shaped the microbial communities, at 30°C, the microbial community at the end of all the experiments was dominated by Acidithiobacillus sp. as well as at 42°C, except when nutrients were not added and Sulfobacillus sp. was the dominant microorganism. At 55°C, DNA recovery was unsuccessful, and at 60°C, the microbial communities were dominated by Sulfolobus sp. In conclusion, the amount of nutrients in bioleaching could be reduced significantly to achieve the redox potentials and metal dissolution desired in bioleaching without affecting the microbial communities and bioleaching efficiencies.

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Section: Microbial Community Compositionmentioning

confidence: 99%

Nutrient optimization in bioleaching: are we overdosing?

Falagán,

Sbaffi,

Williams

et al. 2024

Front. Microbiol.

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“…Accordingly, in a good relation with this current microbiological search, there are reports about applications of new biological agents of bioleaching. Descriptions of new acidithiobacilli [ 26 ], sulfobacilli [ 27 ], and archaea [ 28 ] can serve as good examples of new leaching microorganisms in the last two decades. Of interest are not only new species, but also new strains of known species, which can be more active [ 29 , 30 ].…”

Section: Phylogeny Of Leaching Microbiota and Search For New Leaching...mentioning

confidence: 99%

Current Trends in Metal Biomining with a Focus on Genomics Aspects and Attention to Arsenopyrite Leaching—A Review

Абашина

Vainshtein

2023

Microorganisms

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The presented review is based on scientific microbiological articles and patents in the field of biomining valuable metals. The main attention is paid to publications of the last two decades, which illustrate some shifts in objects of interest and modern trends both in general and applied microbiology. The review demonstrates that microbial bioleaching continues to develop actively, despite various problems in its industrial application. The previous classic trends in the microbial bioleaching persist and remain unchanged, including (i) the search for and selection of new effective species and strains and (ii) technical optimization of the bioleaching process. Moreover, new trends were formed during the last decades with an emphasis on the phylogeny of leaching microbiota and on genomes of the leaching microorganisms. This area of genomics provides new, interesting information and forms a basis for the subsequent construction of new leaching strains. For example, this review mentions some changed strains with increased resistance to toxic compounds. Additionally, the review considers some problems of bioleaching valuable metals from toxic arsenopyrite.

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“…Their best growth temperature is 50 to 58 ºC, and their optimal pH is between 1.9 and -2.4. (Hedrich and Shippers, 2021;Zhang et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the weak iron oxidation ability of Sulfobacillus thermosulfidooxidans strain improves chalcopyrite bioleaching through maintaining a favorable redox potential, and chalcopyrite leaching by this strain would not be inhibited in the presence of 200 mM NaCl (Zhang et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Biolixiviación en tanque de un concentrado de cobre utilizando los microorganismos moderadamente termofílicos Sulfobacillus thermosulfidoxidans KMM3 y Sulfobacillus acidophilus KMM26

2021

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Se ha investigado, a escala de laboratorio, el proceso de biolixiviación de un concentrado de cobre utilizando microorganismos termófilos moderados como una alternativa al proceso de fundición convencional; asimismo se han evaluado las condiciones experimentales óptimas para la extracción de cobre en términos de densidad de pulpa, pH y tamaño de partículas del concentrado cuprífero. La experimentación se llevó a cabo en un biorreactor de 5 l de capacidad. Y utilizando dos especies de Sulfobacillus. Los resultados mostraron que, después de 12 días, más del 80% del cobre se puede extraer del concentrado de calcopirita. Las condiciones óptimas para la extracción del metal fueron: una densidad de pulpa del 5% (p/v), un pH inicial de 1 y un tamaño de partícula (d80) de 45 µm. Los resultados de esta investigación contribuirán al diseño, por parte de la Compañía Iranian Babak Copper (IBCCO), de una planta industrial de biolixiviación en tanques de una capacidad anual de 50.000 t de cátodo de cobre.

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Sulfobacillus harzensis sp. nov., an acidophilic bacterium inhabiting mine tailings from a polymetallic mine

Cited by 13 publications

References 56 publications

Nutrient optimization in bioleaching: are we overdosing?

Nutrient optimization in bioleaching: are we overdosing?

Current Trends in Metal Biomining with a Focus on Genomics Aspects and Attention to Arsenopyrite Leaching—A Review

Biolixiviación en tanque de un concentrado de cobre utilizando los microorganismos moderadamente termofílicos Sulfobacillus thermosulfidoxidans KMM3 y Sulfobacillus acidophilus KMM26

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