| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a biological desulfurization technology which enables the efficient biological desulfurization of a high sulfur load at a low operating cost, and can be miniaturized. <P>SOLUTION: A biological desulfurization apparatus 1 includes a filler F1 for bringing an absorption liquid consisting mainly of water into gas-liquid contact with hydrogen sulfide-containing gas to make the absorption liquid absorb hydrogen sulfide, and a filler F2 for supporting sulfur-oxidizing bacteria for oxidizing the hydrogen sulfide absorbed by the absorption liquid on the surface. The filler F1 is made of a material having a critical surface tension of 50 dyn/cm or more, and the filler F2 is made of a material having a critical surface tension of 40 dyn/cm or less. The hydrogen sulfide-containing gas and the absorption liquid are supplied onto the filler F1 to be brought into the gas-liquid contact to make the absorption liquid absorb the hydrogen sulfide, and then the absorption liquid is supplied to the sulfur-oxidizing bacteria on the surface of the filler F2 to oxidize the hydrogen sulfide. Oxygen is sufficiently supplied to the sulfur-oxidizing bacteria, and the temperatures of the fillers F1 and F2 are individually optimized. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
