衛生工学研究論文集
Online ISSN : 1884-8281
Print ISSN : 0913-4069
ISSN-L : 0913-4069
低温域における酸発酵特性に及ぼす温度とHRTの影響
車 基吉李 玉友野池 達也
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ジャーナル フリー

1992 年 28 巻 p. 29-37

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Effect of temperature and hydraulic retention time (HRT) on the characteristics of acidogenesis in anaerobic digestion were investigated using anaerobic chemostat-type reactor, which soluble starch was fed as a substrate.
The HRTs were 0.25d, 0.5d, 1.0d and 2.0d. The experimental temperature was changed in the rangefrom 10°C to 30°C. The degradation efficiency of the substrate and the composition of volatile fatty acids (VFA) produced in anaerobic acidogenesis were significantly affected by the temperature and HRT. The necessary HRT for obtaining the high degradation efficiency of 95% at the temperature ranges of 20°Cto 30°C and 10°C to 20°C were 1.0d and 2.0d, respectively. At the condition that the temperature ranged from 20°C to 25°C and the HRT rangedfrom 1.0d to 2.0d, the COD yields of various products to the influent substrate in the reactors ranged in the following percentage; VSS: 20 to 22%, VFA: 41 to 54%, Others: 9 to 30%, H2: 6 to 12% and CH4: 0.4 to 0.8%. The effects of temperature and HRT on the distribution of acidogenc bacteria, homoacetogenic bacteria, acetate-consuming methanogenic bacteria and H2-consuming methanogenic bacteria were studied by enumerating the bacterial population levels. From this investigation, it was elucidated that the complete phase separation of acidogenesis and methanogenesis was possible by conducting the acidogenesis below the temperature of 25°C.

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