| 摘要 |
<p>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 maintained 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 ferricion solution is separated from the microorganism by ultrafiltration.</p> |
