Chemistry of inorganic compounds – Sulfur or compound thereof – Oxygen containing
Patent
1998-05-08
2000-05-02
Griffin, Steven P.
Chemistry of inorganic compounds
Sulfur or compound thereof
Oxygen containing
4235731, 4235768, 423DIG17, 435266, C01B 1769
Patent
active
060569344
ABSTRACT:
A process is provided for removing hydrogen sulfide out of gas, such as gas separated from geothermal brine, by passing the hydrogen sulfide containing gas and oxygen containing gas through a bioreactor containing bacteria, such as Beggiatoa, Thiothrix and Thiobacilli, supported on a support so that the bacteria oxide the hydrogen sulfide into elemental sulfur, which is subsequently oxidized into sulfuric acid. The flow of the gases through the bioreactor is cyclically reserved about every 12 hours to about 5 days so as to provide a better sulfur distribution in the support, resulting in more efficient oxidation of the elemental sulfur into sulfuric acid. Hydrogen sulfide depleted gas and sulfuric acid are discharged from the bioreactor. A plurality of bioreactors may be used, connected in series or in parallel.
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Carlsen Bruce
Sonneville Allen
Griffin Steven P.
MidAmerican Energy Holdings Co.
Vanoy Timothy C
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