| 摘要 |
<p>PURPOSE:To obtain a treated gas high in methane content by desulfurizing an anaerobic biological reaction gas in low power, at low cost and in high desulfurizing ratio without causing clogging with a simple device and to make sulfur compd. such as hydrogen sulfide harmless to discharge together with a treated liq. CONSTITUTION:The anaerobic biological reaction gas generating in an anaerobic treating device 1 is subjected to gas-liquid contacting with a mixed soln. or a treated liq. of an aerobic oxidizing device 2 in an absorbing device 3 to make a sulfur compd. such as hydrogen sulfide absorbed, and a washing liq. after absorption is aerobically oxidized in the aerobic oxidizing device 2 to oxidize hydrogen sulfide, etc., and desulfurize. In the absorption device 3, trays 15a, 15b... consisting of a perforated plate are arranged in multistage state and connected with liq. dropping passage 16a, 16b... to form a washing liq. layer, and a rising gas through an opening is brought into contact with the liq. to make hydrogen sulfide, etc., absorbed and a desulfurizing agent packing layer 22 is formed at an uppermost part to execute desulfurization with the desulfurizing agent.</p> |
