An agricultural waste digester and biogas generation system. The system includes a digester assembly having a cylindrical body, a hollow interior, a center axis and a plurality of wheel segments within the interior of the digester assembly. A gas conduit extends from the interior of the digester assembly to a power generation device. Also included is a water vessel containing water, and each of the plurality of wheel segments have an acruate, contoured surface area which restrict biogas movement within the digester assembly to produce induced agitation of agricultural waste.