This is so amazingly stupid and shows how much these people DO NOT know. The vast majority of methane produced by ruminants, cattle, sheep, llamas, goats, deer, elk, buffalo, come from their rumination. It is from the bacteria that exists in their multi-chambered stomachs that allows them to break down cellulose that created the methane. It comes from the front end not the back. It is NOT the flatulence. Capturing the flatulence will do nothing. Of course, putting gas masks on them to capture gases will prevent eating.
This methane will exist no matter what you do. If the cattle do not eat the grass something else will. That creature, whether large or micro-biotic, will produce produce methane as the by product of breaking down cellulose. If something does not eat the grass it becomes lignant and effects the health of the pasture. Grazed grass grows more grass than mowed grass. The eco-system is more vibrant and retains or sequesters more carbon than dead pasture or mowed pasture.
Finally, the methane cycle is a sub-cycle of the carbon cycle. It is heavier than carbon and breaks down far more rapidly than carbon. Comparing carbon and methane is to compare apples and oranges. Also, the UN’s own studies have shown that there is virtually no relation between the number of cattle and the amount of methane in the atmosphere. That is because, as discussed earlier, something still eats the grass and produces methane. Feedlots and dairies are a bit problematic in that they feed grain and store waste in ponds that enable the rapid production of methane, but it is the microbial activity ii the pond that produces methane, not the animal.
Bottom line, IT IS NEVER ABOUT THE ENVIRONMENT!! It is about controlling the means of production, which is, by definition, socialism. George Will had a great piece about a week ago in which the first sentence was, “Environmentalism is backdoor socialism.” So very true.
Methanogens are not considered a bacteria and do not aid digestion. They are more of a parasite. Possibly they could be controlled with a feed additive, genetically modified grass, or a methanotroph to consume the high energy methane.