publication . Article . Other literature type . 2006

Growth kinetics and competition between Methanosarcina and Methanosaeta in mesophilic anaerobic digestion.

John F. Ferguson; H. David Stensel; Anne Conklin;
  • Published: 01 May 2006 Journal: Water Environment Research, volume 78, pages 486-496 (issn: 1061-4303, Copyright policy)
  • Publisher: Wiley
Methanosarcina species with a high maximum specific growth rate (μ max ) and high half-saturation coefficient (Ks) and Methanosaeta species with a low μ max and low Ks are the only known aceticlastic methanogens. Because of Methanosaeta's low Ks, the low acetate concentrations in conventional, mesophilic anaerobic digestion yield Methanosaeta dominance. However, Methanosarcina absorbs increases in acetate more efficiently and thus promotes more stable digestion. This paper tests the hypothesis that decreasing digester feeding frequencies can increase Methanosarcina predominance. Two acetate-fed reactors were established at a 17-day solids retention time. One rea...
Medical Subject Headings: equipment and suppliescomplex mixtures
free text keywords: Water Science and Technology, Environmental Chemistry, General Medicine, Mesophile, Environmental engineering, Methanosarcina, biology.organism_classification, biology, Growth kinetics, Food science, Anaerobic digestion, Retention time, Kinetics, Digestion, Methanosaeta
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