Microorganisms for desulphurization of coal: the influence of leaching compounds on their growth

Olsson, Gunnel; Larsson, Liselotte; Holst, Olle; Karlsson, Hans T.

doi:10.1016/0016-2361(89)90241-x

Cited by 23 publications

(1 citation statement)

References 5 publications

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“…In addition, experiments have shown that this strain of S. acidocaldarius is sensitive to compounds leached from coal (12). A. brierleyi is able to remove pyrite from coal and to enhance the removal of organically bound sulfur (12b) and does not seem to be sensitive to compounds leached from coal (12).…”

Section: Discussionmentioning

confidence: 99%

Pyrite oxidation by thermophilic archaebacteria

Larsson

Olsson

Holst

et al. 1990

Appl Environ Microbiol

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Three species of thermophilic archaebacteria of the genera Sulfolobus (Sulfolobus acidocaldarius and S. solfataricus) and Acidianus (Acidianus brierleyi) were tested for their ability to oxidize pyrite and to grow autotrophically on pyrite, to explore their potential for use in coal desulfurization. Only A. brierleyi was able to oxidize and grow autotrophically on pyrite. Jarosite was formed during the pyrite oxidation, resulting in the precipitation of sulfate and iron. The medium composition affected the extent of jarosite formation.

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Section: Discussionmentioning

confidence: 99%

Pyrite oxidation by thermophilic archaebacteria

Larsson

Olsson

Holst

et al. 1990

Appl Environ Microbiol

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Biodesulphurization of mengen lignite by Rhodoccocus rhodochrous in a batch stirred and aerated tank fermenter

Bayram

Bozdemir

Durusoy

et al. 1999

Acta Biotechnologica

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The biodesulphurization of Mengen lignite by a mesophilic bacterium. Rhodococcus rhodochrous ATCC 53968, was investigated in a batch stirred and aerated reactor. The experiments were carried out at 28 'C with an inoculum percentage, initial pH, initial sodium acetate and lignite concentration of the biodesulphurization medium of 8% [v/v]. 6.5 mM, 20 mM and 20 gil, respectively. Variations in the sulphur contents of the lignite relative to the biodesulphurization period were monitored. The effects of the stirring and aeration rates on the removal of different sulphur forms from coal were investigated in the ranges 45C1.200 rpm and 0.1-0.53 w m and the optimum values were found to be 500 rpm and 0.18 vvm, respectively. An increase in the total sulphur reduction with increasing biodesulphurization time was observed. The maximum total sulphur removal percentage was found to be 15.2% at 1,200 rpm after four days of incubation. The highest total sulphur removal rate was calculated on the second day of microbial desulphurization for each run. The total and organic sulphur contents of the coal after biodesulphurization were correlated with the stirring and aeration rates by using the non-linear least squares regression method. In the experimental runs Lasting 8 days, the highest organic sulphur reducing percentage of 10.1% was obtained at a stirring rate of 500 rpm and an aeration rate of 0.40 vvm.

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Kinetics of coal desulphurization by Acidianus brierleyi

et al. 1993

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Acidianus brierleyi was demonstrated to remove pyritic sulphur from coal. A. brierfeyi was also found capable of catalyzing the removal of what is normally reported as organic sulphur from coal 171US34. A kinetic analysis was performed by assuming a first order reaction. The first order kinetics allowed a comparison with literature data for Thiobacillus ferrooxidans. Also, formation of jarosite was taken into account in the analysis. The simple first order kinetics was observed to fit the data on removal of sulphur satisfactorily.

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Microorganisms for desulphurization of coal: the influence of leaching compounds on their growth

Cited by 23 publications

References 5 publications

Pyrite oxidation by thermophilic archaebacteria

Pyrite oxidation by thermophilic archaebacteria

Biodesulphurization of mengen lignite by Rhodoccocus rhodochrous in a batch stirred and aerated tank fermenter

Kinetics of coal desulphurization by Acidianus brierleyi

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