Scaled down versions of these digesters were used all over the world during WWII and the years following due to petroleum shortages. And antique engine fans will find interesting details on early engines, ignitions systems, and more. No promises, but it may be that details here could help you run an engine on methane generated by rotting manure and organic material in a digester. Great, raw, rare energy information from a simpler time begging to be adapted to today's world. We've been consuming oil faster than we've been finding it for many years now.
Shortages are on the way.
This might be a way around the problem. Land of Gingery . How to Order . Get a Catalog . The Laboratory .