| 摘要 |
<p>PROBLEM TO BE SOLVED: To remove and deodorize with high efficiency methyl mercaptan by first removing hydrogen sulfide firstly from an odorous gas containing a sulfur compound consisting mainly of hydrogen sulfide, and then irradiating the gas with ultraviolet rays. SOLUTION: An odorous gas deodorizing device 1 is composed of a packed tower 2 for previously removing hydrogen sulfide as an odorous gas and an ultraviolet ray emitting part 3 for irradiating the gas free from the hydrogen sulfide with ultraviolet rays. The packed tower 2 has a packed layer 4 packed with a filter holding microbes, a water spray part 5 located on the upper part of the packed layer 4 and a water receiving part 6 on the lower part of the layer 4. A seed sludge such as an active sludge containing microbes is added to the water receiving part 6 of the packed tower 2, then water is sprayed from the water spray part 5 using a circulating pump 7, and at the same time, the odorous gas is introduced from a gas inlet part 8. Under this structural design, the hydrogen sulfide easily susceptible of a biodegradable treatment is removed in the packed layer 4, and then the gas is conducted into the ultraviolet ray emitting part 3, where the gas is irradiated with the ultraviolet rays to decompose methyl mercaptan and methyl sulfide.</p> |
