Modifications to Puxin 10m3 design for continuous feed digestion of food wastes
Legacy issues from the time when most people assumed biodigesters were a rural technology best fed with animal manures still plague digester design and operation.
A case in point is the current design of the simplified 10m3 Chinese "Puxin" digester.
Plans for the digester, which is increasingly used in urban and suburban areas where food waste is the most available and preferred feedstock, still call for a vertical feedpipe, despite the fact that food wastes are usually very buoyant and have a hard time going down the "throat" of the domestic dragon.