title: Key odor components responsible for the impact on olfactory sense during swine feces composting.
abstract: This study aimed to identify the major odor contributing components produced during swine feces composting which have an impact on the olfactory senses. A total of 64 gas samples collected at different stages of composting were analyzed by both a gas chromatograph and human panel test using the triangle odor bag method. Multiple regression analysis of representative odor substances present in the outlet gas was carried out employing the odor index (OI) as the dependent variable and the odor unit as the independent variable. The recorded changes in OI indicated that turning was an important event during odor evolution, and that the odor emission during the thermophilic phase should be the main target for odor abatement. The model incorporating ammonia, methyl mercaptan and dimethyl sulfide as independent variables confirmed the value of the OI (R(2)=0.70). These compounds were identified to be the key odor components significantly determining the OI.
authors: National Agricultural Research Center for Hokkaido Region, Hokkaido Research Sub-team for Waste Recycling System, Sapporo, Hokkaido 062-8555, Japan. hanadi@affrc.go.jp
authors: Dai
authors: D
authors: Hanajima
authors: Kazutaka
authors: K
authors: Kuroda
authors: Koremoto
authors: K
authors: Morishita
authors: Jun
authors: J
authors: Fujita
authors: Koki
authors: K
authors: Maeda
authors: Riki
authors: R
authors: Morioka
mesh_terms: D000641:Ammonia / Q000032:analysis; D000818:Animals; D005243:Feces; D006801:Humans; D009812:Odorants / Q000032:analysis*; D012903:Smell / Q000502:physiology*; D012987:Soil; D013457:Sulfur Compounds / Q000032:analysis; D013552:Swine
chemical_list: D012987:Soil; D013457:Sulfur Compounds; D000641:Ammonia