Basically, as the bacterias present in the intestine and consequently in the dung of the cattle are the bacterias that will break down the organic material in methane and carbon dioxid, as a consequence, anything that the cattle is able to digest will be producing methane. Maybe are there other bacterias, present in the intestine of other animals, that would be able to digest other types of organic material: let’s think about insects for exemple? it is said that american scientists are experimenting with termites to breack down lignous material in methan. The bacterias develop when the proper feedstock is available, so crushing a few termites in the slurry might increase the methan production with poor calory material.
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