How is biogas produced and what does it contain?

Biogas is produced by methanogenic bacteria that break down cellulosic material anaerobically, typically the sludge from sewage treatment or cattle dung in a biogas plant. It contains mainly methane, with carbon dioxide, hydrogen and hydrogen sulphide.

No citable source has been recorded for this record. Treat it as practice material, not as fact.

Explanation

Methanobacterium is present in the rumen of cattle, which is why cattle dung is such a good starting material.