Sulfate Reduction Relative to Methane Production in High-Rate Anaerobic Digestion: Technical Aspects

DOI Web Site 被引用文献7件
  • Zaid Isa
    Laboratory of Microbial Ecology, State University of Ghent, Coupure L 653, B-9000 Ghent, Belgium
  • Stéphane Grusenmeyer
    Laboratory of Microbial Ecology, State University of Ghent, Coupure L 653, B-9000 Ghent, Belgium
  • Willy Verstraete
    Laboratory of Microbial Ecology, State University of Ghent, Coupure L 653, B-9000 Ghent, Belgium

書誌事項

公開日
1986-03
権利情報
  • https://journals.asm.org/non-commercial-tdm-license
DOI
  • 10.1128/aem.51.3.572-579.1986
公開者
American Society for Microbiology

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説明

<jats:p> The effect of different substrates and different levels of sulfate and sulfide on methane production relative to sulfate reduction in high-rate anaerobic digestion was evaluated. Reactors could be acclimated so that sulfate up to a concentration of 5 g of sulfate S per liter did not significantly affect methanogenesis. Higher levels gave inhibition because of salt toxicity. Sulfate reduction was optimal at a relatively low level of sulfate, i.e., 0.5 g of sulfate S per liter, but was also not significantly affected by higher levels. Both acetoclastic and hydrogenotrophic methane-producing bacteria adapted to much higher levels of free H <jats:sub>2</jats:sub> S than the values reported in the literature (50% inhibition occurred only at free H <jats:sub>2</jats:sub> S levels of more than 1,000 mg/liter). High levels of free H <jats:sub>2</jats:sub> S affected the sulfate-reducing bacteria only slightly. Formate and acetate supported the sulfate-reducing bacteria very poorly. In the high-rate reactors studied, intensive H <jats:sub>2</jats:sub> S formation occurred only when H <jats:sub>2</jats:sub> gas or an H <jats:sub>2</jats:sub> precursor such as ethanol was supplied. </jats:p>

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