鶏ふんの微生物による急速無臭化法

概要

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Chicken feces, a malodorous substance causing environmental pollution, were deodorized within 6 hr when inoculated with a seed culture of pig feces dried and deodorized by an experimental fermentation method by a farmer in Fukuyama city, as a seed culture. A mixture of chicken feces and 20% (w/w) seed culture was blended with agricultural wastes such as rice hulls, rice straw (cut to 5-cm length), and sawdust to give a porosity of 2.0 (l/kg) and a moisture content of 50-60%. Alternatively, without these wastes, the amount of seed cultuer was increased to give the same porosity and moistuer content. These blended materials were left outdoors (20-25℃) in a wooden box with a wire-net bottom to allow natural aeration. During the deodorization process, the numbers of actinomycetes and thermophilic bacteria increased, and those of other microorganisms decreased. The actinomycetes were presumed to deodorize the feces. Hydrogen sulfide, methyl- and ehylmercaptan and sulfur dioxide, which were abundant in the fresh feces, were not found in the deodorized feces. Low-molecularweight fatty acids, mono-, di-, and trimethyl amines, the characteristic malodorous agents of the fresh feces, were scarcely found in the deodorized feces by gas-chromatography. On deodorization, the contents of crude protein, fat, and fiber decreased by 4.5,60,and 10%, respectively. The deodorized feces were expected to be a useful manure.
公益社団法人日本生物工学会の論文