No - anaerobic digestion produces more methane; aerobic digestion (lots of air mixed in) favors more CO2 and less methane. Typically, if you have a deliberately

No - anaerobic digestion produces more methane; aerobic digestion (lots of air mixed in) favors more CO2 and less methane. Typically, if you have a deliberately anaerobic industrial composting operation, you capture the methane and produce a small amount of power from it. But aerobic digestion is faster and is what I believe most big facilities use. There's still some methane but much less than if you threw the stuff in a landfill.