What part does methane play in the process of producing biogas?
When you say produced, do you mean chemically made from another substance, or you do mean released into the atmosphere, or do you mean captured and stored?
Methane, or CH4, is a biogas as it is gas biologically created by organisms. Methane is created in natural processes from which it may be immediately released into the atmosphere or on much slower time scales, such as millennia and more. Methane is also released in some artificial processes, such as the flaring on oil wells. Likewise, in petroleum processing facilities, methane can leak out in other ways than is intended. So, that is how it gets out, or is &quot;produced&quot; as a free gas.
However, if you are asking if CH4 is produced chemically as a product of processing OTHER gases, then the answer is only a mild &quot;sort of&quot;. When natural gas from within the Earth is removed from the ground, it contains methane, propane and other gases that are separated into their components. However, most of the nat gas IS methane to begin with. So, saying it is &quot;produced&quot; is sort of true and easily misunderstood.