<b>Effects of Automatic Mixing by a Siphon on Anaerobic Digestion</b>

DOI Web Site 33 References
  • WU Ya-Peng
    Graduate School of Environmental Studies, Tohoku University
  • KOBAYASHI Takuro
    Center for Material Cycles and Waste Management Research, National Institute for Environmental Studies
  • XU Kai-Qin
    Center for Material Cycles and Waste Management Research, National Institute for Environmental Studies
  • LI Yu-You
    Graduate School of Environmental Studies, Tohoku University

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Other Title
  • サイフォン式無動力撹拌のメタン発酵に及ぼす効果
  • サイフォン式無動力撹拌のメタン発酵に及ぼす効果 : 異なる撹拌方式の比較実験
  • サイフォンシキ ムドウリョク カクハン ノ メタン ハッコウ ニ オヨボス コウカ : コトナル カクハン ホウシキ ノ ヒカク ジッケン
  • Effects of Automatic Mixing by a Siphon on Anaerobic Digestion
  • <b>Comparative Experiments Using Reactors with Different Mixing Modes </b>
  • ─異なる撹拌方式の比較実験─

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Abstract

A continuous experiment of mesophilic anaerobic digestion of kitchen waste was performed using three types of reactors: ⑴ an automatic mixing reactor with a siphon(siphon reactor),⑵ a completely stirred reactor and ⑶ an unmixed reactor. Comparisons of performance and digestion characteristics inside the reactors show significant variations, described below. The siphon reactor performed well under a very high COD loading rate, while an increase in the COD loading rate to 10 ㎏/㎥/d triggered a significant volatile fatty acid(VFA)accumulation in the plug flow reactor. Even under a similar COD loading rate, the methane yield of the siphon reactor was at least 10% higher than that of the unmixed reactor. VFA and Organic Solids were distributed uniformly inside the siphon reactor as compared to the unmixed reactor, potentially leading to reduced precipitations and acidification.

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