돼지 사체의 혐기적 고온 매몰퇴비화법에서의 악취발생 특성

초록

It is very important to treat infected livestock carcasses safely and quickly. In this study, the degradationcharacteristics and odor generation characteristics of carcasses were investigated during the treatment of swinecarcasses using the anaerobic burial composting method. While the carcasses were decomposed, the temperatureremained high, at 40~55oC on average, and most of the carcasses were decomposed rapidly. The major odorcontributingsubstances in the buried composting method are sulfuric odor substances such as H2S, CH3SH,dimethyl sulfide (DMS) and dimethyl disulfide (DMDS), and the odor contribution of these substances is 93~99%. Among them, CH3SH, which accounts for about 56~89% of odor contribution, was the most representativeindicator substance. Despite the anaerobic digestion process, the methane concentration in the digestion processwas as low as 0.5~0.8% at the burial point of the carcass. The odor and methane produced during thedecomposition of the carcasses decreased considerably during the discharge to the surface layer through the buriedlayer consisting of compost. These results suggest that anaerobic high temperature burial composting is one ofthe most useful methods to treat carcasses of infected livestock.

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