Acidophilic Microorganisms

2000 ◽  
pp. 107-116 ◽  
Author(s):  
Joseph Seckbach
Keyword(s):  
Acidophilic Microorganisms

Acidophilic Microorganisms from Geothermal Copahue Volcano System. Assessment of Biotechnological Applications

2009 ◽  
Vol 71-73 ◽  
pp. 87-91 ◽  
Author(s):  
P. Chiacchiarini ◽  
L. Lavalle ◽  
Alejandra Giaveno ◽  
Edgardo R. Donati
Keyword(s):  
Hot Springs ◽  
Heterotrophic Bacteria ◽  
Extreme Environment ◽  
Acidithiobacillus Thiooxidans ◽  
Biotechnological Applications ◽  
Acidophilic Microorganisms ◽  
Autotrophic Bacteria ◽  
Physiological Properties ◽  
Biological Studies ◽  
System Assessment

This work presents an overview of the physicochemical and biological studies carried out along Rio Agrio and in different hot springs belonging to the geothermal Copahue volcano system, in Neuquén Argentina. This is an extreme environment characterized by wide ranges of temperature, pH (<1 to 8) and heavy metals concentration. In these extreme conditions chemolitho-autotrophic bacteria, archaea, heterotrophic bacteria, yeasts and filamentous fungi were detected. Members of Leptospirillum ferrooxidans, Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans and Acidianus spp., among others, were successfully cultivated and physiological properties of different isolates were determined. Additionally, bioleaching and biooxidation of regional ores were carried out using mixed native cultures.

Bioleaching of Enargite and Tennantite by Moderately Thermophilic Acidophilic Microorganisms

Microbiology ◽  
2020 ◽  
Vol 89 (4) ◽  
pp. 413-424
Author(s):  
Yu. A. Elkina ◽  
E. A. Melnikova ◽  
V. S. Melamud ◽  
A. G. Bulaev
Keyword(s):  
Acidophilic Microorganisms ◽  
Moderately Thermophilic

Transformation of iron in pure culture process of extremely acidophilic microorganisms

2017 ◽  
Vol 27 (5) ◽  
pp. 1150-1155 ◽  
Author(s):  
Jing-hua FANG ◽  
Yong LIU ◽  
Wan-li HE ◽  
Wen-qing QIN ◽  
Guan-zhou QIU ◽  
...  
Keyword(s):  
Pure Culture ◽  
Acidophilic Microorganisms ◽  
Culture Process

scholarly journals Electricity generation from an inorganic sulfur compound containing mining wastewater by acidophilic microorganisms

2016 ◽  
Vol 167 (7) ◽  
pp. 568-575 ◽  
Author(s):  
Gaofeng Ni ◽  
Stephan Christel ◽  
Pawel Roman ◽  
Zhen Lim Wong ◽  
Martijn F.M. Bijmans ◽  
...  
Keyword(s):  
Electricity Generation ◽  
Sulfur Compound ◽  
Acidophilic Microorganisms ◽  
Inorganic Sulfur ◽  
Mining Wastewater ◽  
Inorganic Sulfur Compound

scholarly journals Pyrite Biooxidation by Acidophilic Archaea AcidiplasmaSp. MBA-1 Under Varied Conditions

2022 ◽  
Author(s):  
Aleksandr Bulaev
Keyword(s):  
Potential Role ◽  
Sulfide Mineral ◽  
High Rate ◽  
Mineral Nutrient ◽  
Acidophilic Microorganisms ◽  
Moderately Thermophilic ◽  
Operational Temperature ◽  
Low Levels ◽  
Acidophilic Archaea

The goal of this research was to study pyrite (FeS2 ) bioleaching by a strain of the genus Acidiplasma under different conditions (temperature, pH) to evaluate the potential role of Acidiplasma representatives in biooxidation of this sulfide mineral. To compare the role of Acidiplasma archaea in pyrite biooxidation with other acidophilic microorganisms, the experiments were also performed with representatives of othergroups of microorganisms predominant in biohydrometallurgical processes.Pure and mixed cultures of moderately thermophilic acidophilic microorganisms, including strains Acidithiobacillus caldus MBC-1, Sulfobacillusthermosulfidooxidans VKMV 1269T and Acidiplasmasp. MBA-1, were used. The experiments were carried out in flasks with 100 mL of mineral nutrient medium supplemented with 0.02% yeast extract and 1 g of pyrite on a rotary shaker for 20 days. Bioleaching was performed at 45, 55, and 60∘С. The results demonstrated that the representatives of the genus Acidiplasmaprovided a comparatively higher rate of pyrite bioleaching at high temperatures (55 and 60∘C) and low pH of the medium (1.0). Thus, according to the results, strains of thegenus Acidiplasma may provide a high rate of pyrite bioleaching at low levels ofpH. Therefore, the results suggest that archaea of the genus Acidiplasma may be promising microorganisms to improve bioleaching processes with an increase in the operational temperature, which is usually maintained at 40–45∘C in industrial-scale reactors. Keywords: biomining, bioleaching, acidophilic microorganisms, sulfide minerals, pyrite

Dissolution kinetics of spent petroleum catalyst using sulfur oxidizing acidophilic microorganisms

2009 ◽  
Vol 167 (1-3) ◽  
pp. 1231-1236 ◽  
Author(s):  
Debaraj Mishra ◽  
Jong G. Ahn ◽  
Dong J. Kim ◽  
G. RoyChaudhury ◽  
David E. Ralph
Keyword(s):  
Dissolution Kinetics ◽  
Acidophilic Microorganisms ◽  
Sulfur Oxidizing ◽  
Kinetics Of
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