METHOD FOR DEODORIZING HYDROGEN SULFIDE CONTAINING GAS

摘要

PROBLEM TO BE SOLVED: To obtain gas low in the concentration of hydrogen sulfide by efficiently treating hydrogen sulfide containing gas at a low cost without requiring large capacity equipment nor using a large amount of alkali. SOLUTION: The method for desulfurizing the hydrogen sulfide-containing gas has a primary desulfurization process 1 for bringing raw gas containing hydrogen sulfide into contact with activated sludge and biological treatment water or industrial water to roughly remove hydrogen sulfide in the raw gas, and a secondary desulfurization process 4 for bringing the treated gas in the primary desulfurization process into contact with alkali in a wet or dry state to remove hydrogen sulfide remaining in the raw gas.