Characteristics of carbohydrate degradation and the rate‐limiting step in anaerobic digestion

Tatsuya Noike, Ginro Endo, Juu‐En ‐E Chang, Jun‐Ichi ‐I Yaguchi, Jun‐Ichiro ‐I Matsumoto

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259 Citations (Scopus)

Abstract

The characteristics of the degradation of cellulose, soluble starch, and glucose in the acidogenic phase and the effects of the substrate loading rate and biological solids retention time on the methanogenic phase of anaerobic digestion were investigated. The results obtained from continuous experiments using laboratory‐scale anaerobic chemostat reactors elucidated the true rate‐limiting step of anaerobic digestion. The specific rate of substrate utilization decreased in the following order: glucose, soluble starch, acetic acid, and cellulose. The rate of the hydrolysis of cellulose was so low that this was shown to be the rate‐limiting step in overall anaerobic digestion. Among methanogenic bacteria Methanosarcina would provide a higher substrate utilization rate than Methanothrix, and the maximum allowable substrate loading rate in the methanogenic phase was 11.2 g acetic acid/L day.

Original languageEnglish
Pages (from-to)1482-1489
Number of pages8
JournalBiotechnology and Bioengineering
Volume27
Issue number10
DOIs
Publication statusPublished - 1985 Oct

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Bioengineering
  • Applied Microbiology and Biotechnology

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