複合基質からの嫌気性水素発酵に及ぼす基質濃度とpHの影響 Effect of Substrate Concentration and pH on Hydrogen Fermentation of Mixed Substrate by Microflora

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著者

    • 李 玉友 [他] LI Yu-You
    • 東北大学大学院工学研究科土木工学専攻 Department of Civil Engineering, Graduate School of Engineering, Tohoku University
    • 野池 達也 NOIKE Tatsuya
    • 東北大学大学院工学研究科土木工学専攻 Department of Civil Engineering, Graduate School of Engineering, Tohoku University

抄録

The influence of substrate concentration and pH on hydrogen fermentation of a mixed substrate by a mixed microflora was investigated using a batch experiment. The batch reactor with a working volume of 1.0 liter was operated at 35°C at a constant pH for each experimental run. Dog food was used as the substrate. The seed microflora was a mixed culture having Clostridium pasteurianum and Sporolactobacillus racemicus M116. It was obtained by acclimatizing a thermophiledigested sludge using glucose as the substrate. The experiments were conducted by changing the pH from 4.0 to 7.5 at various substrate concentrations of TS2%, TS5%, and TS10% to evaluate substrate decomposition, gas production and metabolic production under each condition. Hydrogen fermentation was greatly affected by pH at each TS concentration and the optimal pHs for obtaining maximum hydrogen yield were identified to be 4.5-5.5 for TS2%, 5.5 for TS5% and 6.5 for TS10%. The maximum hydrogen productions at TS2%, TS5% and TS10% ranged from 93.9 to 108 ml·g-1 VS, and no significant influence caused by the substrate TS concentration was noted. These results indicate that hydrogen fermentation can be effectively operated under a high-substrate condition as well as at TS10% by maintaining an optimum pH. The H2 yield at the optimal pH was as high as 1.80 mol H2·mol-1 glucose. Lactic acid was the main product at a low pH, while a complex fermentation pattern was obtained at a pH close to 7.0. Both these fermentation patterns resulted in a decrease in H2 production.

収録刊行物

  • 水環境学会誌 = Journal of Japan Society on Water Environment

    水環境学会誌 = Journal of Japan Society on Water Environment 27(7), 473-479, 2004-07-10

    公益社団法人 日本水環境学会

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被引用文献:  4件中 1-4件 を表示

各種コード

  • NII論文ID(NAID)
    10013275078
  • NII書誌ID(NCID)
    AN10372439
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09168958
  • NDL 記事登録ID
    7027791
  • NDL 雑誌分類
    ZN5(科学技術--建設工学・建設業--都市工学・衛生工学)
  • NDL 請求記号
    Z16-1045
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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