| 摘要 |
<p>The purpose of the present invention is to provide a device and method for biological desulfurization of biogas with which efficiently treating high-load hydrogen sulfide and converting the treated hydrogen sulfide to sulfuric acid eliminates in-device blockage, eliminates steps such as cleaning, and enables low-cost treatment. The present invention is a biological desulfurization device characterized in that: provided are a biogas inflow line (5) for allowing biogas to flow in from an end of a biological desulfurization column (1), a treated gas outflow line (7) for discharging treated gas to a subsequent stage of a packed bed (1a) which is another end of the biological desulfurization column and bears microorganisms, and a circulated gas line (8) for circulating some of the treated gas to the end of the biological desulfurization column where the biogas flows in; and, in an arithmetic unit (11), a hydrogen sulfide load quantity is calculated from measurement values of a hydrogen sulfide concentration meter (3) and a gas flowmeter (4) provided to the biogas inflow line (2), a circulated gas amount regulatory mechanism (9) being actuated according to the results thereof to adjust the amount of circulated gas passing through the circulated gas line (8).</p> |
