Bacteria Methanogenesis

These reductases play a key role both in methanogenesis and in the degradation of phenols that carry several nitro groups, which is discussed further in Chapter 9, Part 5. Although these reductases are typically found in methanogens, they have been encountered in a number of other bacteria and archaea ... 

The hydrogen concentration determines the competition between this so-called halorespiration and methanogenesis. Acetotrophic bacteria such as Desulfitobacterium sp. are associated with incomplete dechlorination to cis-DCE while Dehalococcoides sp., which are hydrogenotrophic, are associated with complete dechlorination to ethene (Yang et al., 2005). 

Methanogenesis. Finally, the products of either acidogenesis or acetogenesis are transformed into methane and carbon dioxide by the methanogenic bacteria. It is well known that this step is the limiting one in case of nonparticulate substrate or non-excessively complex organic matter. 

DiMarco, A. A., T. A. Bobik, and R. S. Wolfe, Unusual coenzymes of methanogenesis. Ann. Rev. Biochem. 59 355 (1990). A review of the recently characterized coenzymes required for the biosynthesis of methane in methanogenic bacteria. 

Methanogenesis is a highly specialized form of energy metabolism for which the methanogenic bacteria are uniquely adapted. The process of energy capture involves at least two steps in which transmembrane potentials are generated. In... 

The excreted end-products of fermentations, including hydrogen gas, can be used by other anaerobic bacteria, and what is known as an anaerobic food chain develops. At the bottom of the food chain are the archaeal methanogens, different species of which convert hydrogen gas, carbon dioxide, or acetate to CH4. The process of methanogenesis from H2 and C02 occurs as follows ... 

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