NOVELTY - Anaerobic waste digestion system for anaerobic digestion of organic waste comprises bins each containing waste to be digested; containers sealingly connected end-on-end and/or stacked on top of each other to form a tunnel to receive the waste; rails on which bins containing the organic waste are loaded into the tunnel; and rails on which the bins containing the digested organic waste are unloaded from the tunnel. The tunnel is configured to receive the bins and then to be sealingly closed and contain the bins for a given period for digestion of the waste contained in it.    USE - The anaerobic waste digestion system is useful for anaerobic digestion of organic waste (claimed) used for producing methane gas.    ADVANTAGE - The method capitalizes on natural processes and virtually eliminates all the associated hazards by providing a tunnel, containment, and material handling system. It can recover substantially all of the gas created by the anaerobic digestion during the chosen degradation period in an efficient and effective batch process.    DETAILED DESCRIPTION - Anaerobic waste digestion system for anaerobic digestion of organic waste comprises bins each containing waste to be digested; containers sealingly connected end-on-end and/or stacked on top of each other to form a tunnel to receive the waste; rails on which bins containing the organic waste are loaded into the tunnel; and rails on which the bins containing the digested organic waste are unloaded from the tunnel. The tunnel is configured to receive the bins and then to be sealingly closed and contain the bins for a given period for digestion of the waste contained in it. The system comprises a cluster of tunnels arranged side-by-side, each tunnel comprises containers sealingly connected end-on-end and/or stacked one on top of another. The number and/or size of the containers define a tunnel selected to define a daily volume of waste to be processed, and the number of side-by-side tunnels is selected based on the number of days of the given period of digestion. An INDEPENDENT CLAIM is included for a method of anaerobic digestion of organic waste which involves sealingly connecting containers end-on-end and/or one on top of another to form a tunnel to receive the waste; providing the waste to the tunnel in bins, via rails, into the tunnel, sealing the tunnel closed; containing the bins for a given digestion period; and unloading the bins via rails after the digestion period; where the tunnels are provided in a cluster comprising one tunnel for each day of the digestion period, and where the number of tunnels is such that as one tunnel is loaded, another tunnel in which waste has been contained for the complete digestion period can be unloaded.