Huishan Dairy is setting up a methane gas generator that should provide something in the neighborhood of 5.66 MWatts of power from a very renewable energy supply. From one article, that would be enough power to power 3500 American homes, so I wonder how many Chinese houses that will power? The side benefit might be that they will be able to cut carbon emissions by a staggering 180,000 tons, and produce over 600,000 tons of fertilizer. PopSci article. Slightly more technical Technology Review article.