| abstract |
The present invention provides a biogas generation system capable of generating biogas from organic waste and removing hydrogen sulfide contained in the biogas continuously and at a high level by an adsorption removal method. The high concentration hydrogen sulfide gas is removed without producing industrial waste. A methane fermentation tank 56 for anaerobically fermenting organic waste to generate biogas, an adsorption process for adsorbing and removing hydrogen sulfide contained in the biogas by a porous adsorbent, and adsorption In a biogas generation system having a gas purification device 21 for repeatedly purifying the hydrogen sulfide by desorbing and discharging the hydrogen sulfide with a regeneration gas, the organic waste before or after the anaerobic fermentation is biologically treated. A biogas generation system, further comprising one or a plurality of biological reaction tanks, wherein the exhaust gas containing the desorbed hydrogen sulfide is directly or indirectly introduced into at least one of the biological reaction tanks. [Selection] Figure 1 |