Biodesulphurization process utilizing bacteria

Details Biodesulphurization process utilizing bacteria Biodesulphurization process utilizing bacteria

1989-12-11

1992-03-03

Dees, Carl F.

Fuel and related compositions

Coal treating process or product thereof

Removal of undesirable

44621, 435262, C10L 910

Patent

active

050929097

ABSTRACT:
Method and apparatus for treating sulphur bearing coal comprising pulverizing the coal, mixing it with water, a reagent and free air and pumping the resulting mixture to a classifier to separate the coal from sulphur and clay, all at the mine site. The resulting pure coal slurry is then pumped to a plant site where it is mixed with acid and bacteria. The resulting slurry is pumped to a bacteria digester wherein it is recirculated to provide maximum contact of bacteria and coal, completing the removal of sulphur. The resulting slurry is introduced into a mixer wherein the bacteria is neutralized by a reagent, raising the pH above 7 to destroy the bacteria and simultaneously aerating the mixture to treat the effuent. The desulphurized coal is treated by drying apparatus to provide a final purified coal product.

REFERENCES:
patent: 4134737 (1979-01-01), Yang
patent: 4206288 (1980-06-01), Detz et al.
patent: 4456688 (1984-06-01), Dugan et al.
patent: 4562156 (1985-12-01), Isbister et al.
patent: 4632906 (1986-12-01), Kopacz
patent: 4659670 (1987-04-01), Stevens, Jr. et al.
patent: 4775627 (1988-10-01), Attia et al.

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