| 摘要 |
PURPOSE: Provided is a method and apparatus therefor for removing hydrogen sulfide from a bio-gas generated from an anaerobic digestion process of organic waste using air, water and sulfur-oxidizing bacteria at low cost, thereby increasing purify of bio-gas. CONSTITUTION: The method comprises the steps of (a) irradiating natural light to a bioreactor which ferments organic waste therein for oxidizing hydrogen sulfide to sulfur by anaerobic and aerobic photosynthetic bacteria and reducing carbon dioxide, (b) passing biogas generated from the fermented organic waste by the bioreactor through a gas dome in which aerobic sulfur-oxidizing bacteria such as beggiatoa and thiothrix are dispersed while supplying oxygen to the gas dome for desulfurization, and (c) passing the desulfurized biogas through water to precipitate sulfur oxides. The apparatus comprises a bioreactor(2); a gas dome(6) installed at an upper end portion of the bioreactor(2) and provided with a transparent plate(7) at the top thereof, an air inlet(5) and a vent hole(8); an air generator(4) connected to the air inlet(5), and a washing tank(10) connected to the vent hole(8) of the gas dome(6) and provided with an air inlet(10a) through which gas exhausted from the vent hole(8) is introduced and which is submerged, a vent hole(10b) not submerged, formed at an upper portion thereof and connected to a gas tank(12), and a drain valve(11).
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