And if it is this is important as methane is a potent greenhouse gas. If the bacteria used in the process are obligate aerobes this would encourage the carbon

And if it is this is important as methane is a potent greenhouse gas. If the bacteria used in the process are obligate aerobes this would encourage the carbon dioxide route. This would also be the case if the bacteria were selected or engineered to preferentially produce carbon dioxide. But regardless, the waste put in to the bin will have its own bacteria too. So if any of those are methanogens then it would be especially important to keep the company's bacteria up to date ("Fresh bacteria are added every three months for quality control."), and/or to ensure good air flow through the waste bin.