NOVELTY - The agricultural waste digester and biogas generation system comprises a water vessel (14), a buoyant digester assembly, a gas conduit, a waste transport conduit, and an auger. The water vessel contains water, and is configured to support a weight of an entire digester assembly. The buoyant digester assembly includes a cylindrical body (18), a hollow interior, a center axis (22), and wheel segments within the interior of the digester assembly. The gas conduit extends from the interior of the digester assembly to a power generation device, and includes a valve assembly.    USE - Used as an agricultural waste digester and biogas generation system, where the agricultural waste includes animal manure or organic waste and vegetation compost.    ADVANTAGE - The scalable agricultural waste digester and biogas generation system is simple to construct, operate and maintain, and economically and efficiently produces the biogas in an environmentally friendly manner with less energy consumption.    DETAILED DESCRIPTION - The agricultural waste digester and biogas generation system comprises a water vessel (14), a buoyant digester assembly, a gas conduit, a waste transport conduit, and an auger. The water vessel contains water, and is configured to support a weight of an entire digester assembly. The buoyant digester assembly includes a cylindrical body (18), a hollow interior, a center axis (22), and wheel segments within the interior of the digester assembly. The gas conduit extends from the interior of the digester assembly to a power generation device, and includes a valve assembly actuated by agricultural waste within the digester. The wheel segments: include uniformly oriented concave surfaces and perforations; are each fixedly attached to the cylindrical body at an outer edge; and extend towards the center axis such that ascending biogas within the digester assembly is trapped under the concave surfaces on one side of the digester assembly such that the cylindrical body rotates about the center axis. The perforations are located at the outer edge. The convex surfaces are placed on a side of arcuate bodies opposite to the concave surfaces. The cylindrical body is closed at both ends by a first cover (24) and a second cover (26). The waste transport conduit: is in communication with agricultural waste within the interior of the cylindrical body; extends from the cylindrical body to a waste discharge conduit; and includes a conduit body. The conduit body extends outwardly from a first end attached to a side wall of the cylindrical body to a second end attached to the waste discharge conduit, and has a curved contour as the body extends from the cylindrical body to the waste discharge conduit. The auger is disposed within the waste discharge conduit, and is fixedly attached to the interior of the waste discharge conduit such that the auger rotates in unison with the waste discharge conduit and the cylindrical body. The second end of the waste discharge conduit is connected to the cylindrical body via a rotatable joint such that the waste discharge conduit rotates in unison with the cylindrical body and the waste transport conduit. An INDEPENDENT CLAIM is included for a method of generating biogas from agricultural waste.    DESCRIPTION OF DRAWING(S) - The diagram shows a side cross sectional view of a digester assembly.    Water vessel (14)    Cylindrical body (18)    Center axis (22)    First cover (24)    Second cover. (26)