황계열 악취물질 제어를 위한 저온플라즈마와 촉매산화제 적용에서 상대습도의 영향

In year 2010, the foot-and-mouth disease spreaded all over the country in Korea, and approximately 3,000,000 animals were killed and more than 4,800 carcass burial sites were urgently made. Inside the carcass burial sites, sulfur-containing odor compounds such as hydrogen sulfide and dimethyldisulfide (DMDS) were produced by anaerobic microorganisms. In this study, a non-thermal plasma (NTP) system was applied for the removals of sulfur compounds emitted from carcass decomposition. Especially, the effects of relative humidity on the hydrogen sulfide and DMDS removals in the NTP reaction was evaluated. When relative humidity increased form <5% to 90% in the inlet odor-containing gas stream, the amount of ozone produced also increased, so that the hydrogen sulfide and DMDS removal efficiency increased as well. Based on the Gibb’s free energy calculations for the ozone reactions with hydrogen sulfide and DMDS, the oxidation potential of DMDS with ozone was much stronger than that of hydrogen sulfide ; therefore, DMDS was first removed by ozone, and hydrogen sulfide was further oxidized in the following catalyst bed.