NOVELTY - Producing methane comprising incubating solid agricultural wastes and hydrolytic bacterial culture under anaerobic conditions, combining a portion of the mixture with a methanogenesis bacterial culture, incubating the obtained mixture to generate methane, where it is intermittently agitated and a portion of the mixture is transferred to the hydrolysis phase digester, is new.    USE - For the production of methane.    ADVANTAGE - The method produces methane gas with high efficiency.    DETAILED DESCRIPTION - Production of methane comprising digesting solid agricultural waste having methane generating potential by:    (a) contacting the solid agricultural waste with a hydrolytic bacterial culture in a hydrolysis vessel separated into a lower chamber and an upper chamber by a filtration mechanism preventing passage of the solid agricultural waste from the upper to the lower chamber;    (b) incubating the solid agricultural waste and the hydrolytic bacterial culture at a pH of 4.5-6.5, thus hydrolyzing the waste to form an aqueous hydrolysis mixture comprising volatile fatty acids;    (c) filtering and separating a portion(s) of the mixture into hydrolysis mixture and agricultural waste, thus forming a liquid methanogenesis feedstock essentially free of the solid agricultural waste;    (d) transferring a portion(s) of the methanogenesis feedstock into a methanogenesis reactor;    (e) contacting the feedstock is contacted with a methanogenic bacterial culture contained in the reactor, thus forming a methanogenesis mixture having a pH of 6.5-7.5;    (f) incubating the methanogenesis mixture thus forming methane;    (g) transferring a portion(s) of the methanogenesis mixture into the hydrolysis vessel where the methanogenesis mixture is contacted with the solid agricultural waste;    (h) repeating the contacting of the solid agricultural waste with a hydrolytic bacterial culture, and incubating the solid agricultural waste and the hydrolytic bacterial culture steps, to further hydrolyze the solid agricultural waste and continuously generate methane in the reactor, thus exhausting the methane generating potential of the solid agricultural waste, and forming depleted agricultural;    (i) optionally introducing a batch of solid agricultural waste into the hydrolysis reactor;    (j) repeating the contacting of the solid agricultural waste with a hydrolytic bacterial culture, and incubating the solid agricultural waste and the hydrolytic bacterial culture steps, is new.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic drawing of an anaerobic solid digester system.