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Many biological processes produce it as it is a a byproduct of [[fermentation]] and [[composting]]. This method of production is called [[methanogenesis]]. Methanogenesis generally combines '''water with CO²''' to form methane.<ref>[http://www.sciencedaily.com/releases/2009/03/090330111257.htm Methane production using methanogenesis]</ref><ref>[http://www.sciencedaily.com/releases/2009/03/090330111257.htm Methane production using biohydrogen]</ref><ref>[http://www.forbes.com/sites/petercohan/2012/07/10/will-cambrian-innovation-revolutionize-waste-water-treatment/ Methane generation using microorganisms being looked into by Cambrian Innovation for commercial use]</ref> This is done in a device known as a [[Methane reactor]]<ref>Also called [[microbial electrolysis cell]] (MEC), yet the latter is also used for generating hydrogen</ref> | Many biological processes produce it as it is a a byproduct of [[fermentation]] and [[composting]]. This method of production is called [[methanogenesis]]. Methanogenesis generally combines '''water with CO²''' to form methane.<ref>[http://www.sciencedaily.com/releases/2009/03/090330111257.htm Methane production using methanogenesis]</ref><ref>[http://www.sciencedaily.com/releases/2009/03/090330111257.htm Methane production using biohydrogen]</ref><ref>[http://www.forbes.com/sites/petercohan/2012/07/10/will-cambrian-innovation-revolutionize-waste-water-treatment/ Methane generation using microorganisms being looked into by Cambrian Innovation for commercial use]</ref> This is done in a device known as a [[Methane reactor]]<ref>Also called [[microbial electrolysis cell]] (MEC), yet the latter is also used for generating hydrogen</ref> | ||
Besides using a MEC, another biological process can be used to produce methane. This process uses a [[Biogas|biodigester]]. Basically, [[biogas]], which contains methane, can be used: the methane is simply | Besides using a MEC, another biological process can be used to produce methane. This process uses a [[Biogas|biodigester]]. Basically, [[biogas]], which contains methane, can be used: the methane is simply seperated out of the biogas-mixture. Besides biogas, the same technique can be used with [[natural gas]] (both gases basically containing the same gases). This method hence does not use electricity at all, but in some cases this may also be a disadvantage is it then doesn't allow to store the electricity ie generated using PV-panels. | ||
It can also be produced chemically. The first artificially production method uses electricity and is called the '''Sabatier process'''. This process basically combines '''CO² and hydrogen (H²)'''. See http://en.wikipedia.org/wiki/Sabatier_process | It can also be produced chemically. The first artificially production method uses electricity and is called the '''Sabatier process'''. This process basically combines '''CO² and hydrogen (H²)'''. See http://en.wikipedia.org/wiki/Sabatier_process | ||
A second chemical production method is called [[coal gasification]]. [[Coal]] can be converted into [[syngas]] and [[methane]] (also known as [[town gas]]). The methane can then be | A second chemical production method is called [[coal gasification]]. [[Coal]] can be converted into [[syngas]] and [[methane]] (also known as [[town gas]]). The methane can then be seperated out of the town gas. This production method however is -as clear- not environmentally friendly at all. | ||
== Storage == | == Storage == | ||