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- W62374940 abstract "Laboratory studies on bacterial desulfurization of Pittsburgh seam coal are being conducted to determine the mechanisms of biodepyritization and the resulting implications for design of microbial processes for depyritization of coal. We are currently comparing leach rates of Pittsburgh No. 8 (150 − 600 μm) coal by ferric ions in columns under sterile, anoxic conditions with leach rates of coal inoculated with Thiobacillus ferrooxidans under aerobic conditions. In addition, shake flask studies are in progress to determine if finely ground coal (75 − 150 μm) is depyritized by T. ferrooxidans and Leptospirillum ferrooxidans at similar rates. If the ferric ion mechanism dominates in coal biodepyritization, depyritization of coal fines in slurry ponds could be based on ferric ion leaching. In this system, soluble Fe(III) ion would percolate through the slurry to oxidize pyritic sulfur and, in turn, be reduced to Fe(II). Regeneration of the Fe(III) oxidant from Fe(II) could occur in a rotating biological contactor or other bioreactor as a loop in a recycle stream. This design would eliminate the need for costly aeration of the bulk coal slurry." @default.
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- W62374940 date "1993-01-01" @default.
- W62374940 modified "2023-09-25" @default.
- W62374940 title "Biodepyritization of Pittsburgh Seam Coal: Mechanism and Implications for Process Design" @default.
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- W62374940 doi "https://doi.org/10.1016/b978-0-444-81476-0.50033-8" @default.
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