| 摘要 |
PROBLEM TO BE SOLVED: To provide a biological desulfurization apparatus and a biological desulfurization process capable of safely feeding a biogas containing methane gas and concentrated hydrogen sulfide, etc., to a biological desulfurization column. SOLUTION: The biological desulfurization apparatus has a biological desulfurization column 1 provided with a filler 10 supporting sulfur-oxidizing bacteria in the column and a treatment gas introducing line 11 at the lower part of the column, and the hydrogen sulfide is biologically oxidized by introducing the treatment gas and the oxygen-containing gas to effect the biological desulfurization. The concentration of hydrogen sulfide in the treatment gas is≥0.5 vol.%, the treatment gas introducing line 11 has a plurality of injection parts to dividedly inject the oxygen-containing gas in an amount not less than the stoichiometrically necessary amount for the oxidation of the hydrogen sulfide and≤3 times the stoichiometrically necessary amount, and the oxygen-containing gas is injected in divided state according to the number of the injection parts. COPYRIGHT: (C)2008,JPO&INPIT |
