Methanogenesis process

The other methanogenesis processes are of secondary value. They may include methylotrophic methanogenesis and methyl reduction. In the former case as the substrate serve simple compounds with methyl groups like methanol (CH OH), methylamine (CH NH ) and dimethylsulphide (CHjSCHj), etc., decomposed by disproportionation. An example is a methanol decomposition reaction ... 

Rumen methanogenesis is a necessary but energy-wasteful process as it corresponds to a significant loss of biological dietary energy (6-12% of intake) in the form of CH4. 

Dissolved arsenic is correlated with ammonia (Fig. 4), consistent with a release mechanism associated with the oxidation of organic carbon. Other chemical data not shown here provide clear evidence of iron, manganese and sulfate reduction and abundant methane in some samples indicates that methanogenesis is also occurring. It is not clear however if arsenic is released primarily by a desorption process associated with reduction of sorbed arsenic or by release after the reductive dissolution of the iron oxide sorbent. Phreeqc analysis shows PC02 between 10"12 and 10"° bars and that high arsenic waters are supersaturated with both siderite and vivianite. 

Methanogenesis a process that transforms the fermentation products (VFAs) into methane. 

Fig. 2. A simplified scheme of the AD process 1. Hydrolysis, 2. Acidogenesis, 3. Acetogenesis and 4. Methanogenesis...

Mclnemey Ml, Bryant MR. 1981. Basic principles of bioconversions in anaerobic digestion and methanogenesis. In Sofer SS, Zaborsky OR, editors. Biomass conversion processes for energy and fuels. New York Plenum, p 277-96. 

Methanogenesis The anaerobic microbial process that produces methane. 

Anaerobic treatment of high-strength wastewater containing high sulfate poses several unique problems. The conversion of sulfate to sulfide inhibits methanogenesis in anaerobic treatment processes and thus reduces the overall performance efficiency of the system. Treatment of high sulfate pharmaceutical wastewater via an anaerobic baffled reactor coupled... 

There are relatively few field hydrocarbon biodegradation studies in which methanogenesis was reported to be the dominant electron-accepting process. Wilson et al. (1990) have reported the loss of all three xylene isomers at a rate of 0.03/wk. However, the lack of tracers in this study make it more difficult to interpret. Therefore, the prospects for the methanogenic biodegradation of both met a and para xylene must be considered with caution. 

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