What you are suggesting involves gathering the manure, transporting it to a facility not yet constructed and processing it with available electricity. Seems much too expensive. Also I question whether or not there is enough manure to fuel a whole nation 24/7, 365 days a year.
Not really talking about fueling a whole nation 24/7 but in some cases it could work. Turkey droppings produce electricity in Minnestoa. The point was about using what we have. When I first started gardening I would go to the local sawmill and get pickup loads of sawdust free. Some of it sat for years and years. It was very good stuff. These days it is hard to find because most sawmills burn the sawdust for fuel or make fireplace logs or building materials out of it. And all cow manure is ....is cellulose. It is a good idea to pick the manure out of the field because cows will not eat the grass that comes up in a cowpatty...it keeps down parasites. I have read that there are two cows to every three people in my State.
Most big operations have to handle the manure anyway. They usually have big scapers along the floor of the facility that scapes the manure into a big pile. They then wash the floors down with water and slots in the floor run into a small waste treatment facility that seperates the solids from the liquid. The smart ones then use the liquid to irrigate their fields. The solids piled up are usually sold to landscapers and as a solid fertilizer. It has to be transported anyway. It could be sun dried....and usually is.
