| 摘要 |
<p>PURPOSE:To decompose and remove hydrogen sulfide in digester gases selectively and efficiently by introducing digester gases obtained by anaerobic digestion treatment of organic waste into a biological desulfurization column having therein a layer of packing to which microorganisms able to oxidize and decompose hydrogen sulfide are attached. CONSTITUTION:After biological treatment water of, for example, a sewage disposal plant is passed through a layer of packing 2 formed by filling fibrous peat, etc., in a biological desulfurization column 1 to plant bacteria therein, smelling gases containing hydrogen sulfide of the sewage disposal plant are passed through the layer to cultivate microorganisms so that microorganisms able to oxidize and decompose hydrogen sulfide are attached to the layer 2. And then digester gases obtained by anaerobic digestion treatment of sewage sludge are introduced into the layer from an inlet pipe 3, while air is blown from an air supply pipe 4 thereinto, and the treated gases are discharged from a discharge pipe 5. Since the hydrogen sulfide in the digester gases is decomposed into sulfuric acid ions, secondary environmental pollution such as smell, combustion is not caused.</p> |
