Gas treatment process

Details Gas treatment process Gas treatment process

B - Operations, Transporting

01

D

23/345, 195/64

B01D 53/14 (2006.01) B01D 53/34 (2006.01) B01D 53/52 (2006.01) B01D 53/84 (2006.01)

Patent

CA 1259271

ABSTRACT GAS TREATMENT PROCESS The invention provides a process for the removal of hydrogen sulphide from contaminated gas which comprises contacting contaminated gas with an aqueous ferric-ion solution in a first reactor, removing precipitated sulphur from the resulting aqueous iron-containing solution, oxidising the aqueous iron-containing solution in a second reactor in the presence of an iron-oxidising microorganism and separating resulting aqueous ferric-ion solution from the microorganism, characterised in that the pH of the aqueous iron-containing solution in the second reactor is main- tained in the range 1.2 to 1.9, the total iron concentration in the aqueous solution is at least 15 kg/m3, and the aqueous ferric- ion solution is separated from the microorganism by ultrafiltration.

520989

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