Syntrophic Degradation of Lactate in Methanogenic Co-cultures

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In environments where the amount of the inorganic electron acceptors (oxygen, nitrate, sulfate, sulfur oroxidized metal ions (Fe3+;Mn4+) is insufficient for complete breakdown of organic matter, methane is formed as the major reduced end product. In such methanogenic environments organic acids are degraded by syntrophic associations of fermenting, acetogenic bacteria (e.g., sulfate-reducing bacteria (SRB) as"secondary fermenters") and methanogenic archaea. In these consortia, the conversion of lactate to acetate, CO2 and methane depends on the cooperating activities of both metabolically distinct microbial groups that are tightly linked by the need to maintain the exchanged metabolites (hydrogenandformate) at very low concentrations.

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Meyer, Birte & Stahl, David May 17, 2010.

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In environments where the amount of the inorganic electron acceptors (oxygen, nitrate, sulfate, sulfur oroxidized metal ions (Fe3+;Mn4+) is insufficient for complete breakdown of organic matter, methane is formed as the major reduced end product. In such methanogenic environments organic acids are degraded by syntrophic associations of fermenting, acetogenic bacteria (e.g., sulfate-reducing bacteria (SRB) as"secondary fermenters") and methanogenic archaea. In these consortia, the conversion of lactate to acetate, CO2 and methane depends on the cooperating activities of both metabolically distinct microbial groups that are tightly linked by the need to maintain the exchanged metabolites (hydrogenandformate) at very low concentrations.

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  • 110th General Meeting of the American Society for Microbiology

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  • Report No.: LBNL-3815E-Poster
  • Grant Number: DE-AC02-05CH11231
  • DOI: 10.2172/986317 | External Link
  • Office of Scientific & Technical Information Report Number: 986317
  • Archival Resource Key: ark:/67531/metadc1013310

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Creation Date

  • May 17, 2010

Added to The UNT Digital Library

  • Oct. 14, 2017, 8:36 a.m.

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  • Oct. 17, 2017, 7 p.m.

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Meyer, Birte & Stahl, David. Syntrophic Degradation of Lactate in Methanogenic Co-cultures, report, May 17, 2010; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc1013310/: accessed November 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.