微生物による鶏ふんの悪臭化合物除去

概要

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Removal of malodorants, such as volatile fatty acids (V.F.A.) and dimethyl disulfide (DMDS) from pultry manure, by microorganisms was studied, N-butyric acid which is one of the most offensive V.F.A. malodoratns from poultry manure was utilized by Actionomyces strains W-24 and G-21 isolated from poultry manure ; their respiration activities were 19.8 and 13.2μl O_2-uptake/mg dry cell/hr, respectively. Actinomyces strain G-21 can utilize DMDS as a sole sulfur source at 50℃ which is the temperature of poultry manure fermentation ; the cell mass (OD_<660nm>) reached over 0.50 within 48 hr. Some of the strains of stock cultures grew on DMDS medium at 30℃ and it is vident that there is a variety of culture conditions, including types of strains and growth temperature, that are necessary to find strains which can utilize DMDS. Some types of actions of microorganisms on DMDS were suggested, but DMDS was never converted to methyl mercaptan and dimetyl sulfide by strain G-21. From these results, Actionomyces strains G-21 and W-24 were recognized to be useful strains for removal of malodorants and it is suggested that malodor from poultry manure is reduced mainly by these strains which can grow on fresh poultry manure at 50℃.
1980-07-25