NOVELTY - Methane tank or methane tank group for industrially producing methane comprises N arc methane tanks with same ring, where each methane tank is provided with a hydraulic liquid-regulating tank and a corresponding residue liquid separating tank. The methane tank is provided with a bin group comprising N isometric ring arc bins. The upper and lower ends of the inner arc (chord) frame of the bin are provided with bin inner shaft track wheels, where the central support column of circular methane tank or inner circular wall of annular methane tank group is taken as inner shaft.    USE - Methane tank or methane tank group for industrially producing methane by batch production.    ADVANTAGE - The device, which is fully mechanized, realizes mechanized feeding and secondary removal of waste methane residue, thus, completely separating the new methane material from waste methane residue, where all waste methane residues are removed completely. It has simple operation; and is labor-saving. The large-volume methane tank and methane tank group take all the materials that are capable of generating methane, including municipal domestic waste, as raw materials.    DETAILED DESCRIPTION - Methane tank or methane tank group for industrially producing methane comprises N arc methane tanks with same ring, where each methane tank is provided with a hydraulic liquid-regulating tank and a corresponding residue liquid separating tank. The methane tank is provided with a bin group comprising N isometric ring arc bins. The upper and lower ends of the inner arc (chord) frame of the bin are provided with bin inner shaft track wheels, where the central support column of circular methane tank or inner circular wall of annular methane tank group is taken as inner shaft. The outer arc frame of the bin is provided with a chain (tooth) drive belt. The lower side of the bin chassis is provided with a methane scrapper plate and inner and outer circular track wheels. A bin chassis inner circular track and a bin chassis outer circular track are built in a feeding and discharging chamber. The bottom of the feeding and discharging chamber is provided with a hopper-like methane residue precipitate accumulation tank. A hopper opening of the methane residue precipitate accumulation tank is connected to water inlet of the blowing tube and slurry pump; and a water outlet of the slurry pump is mounted on the residue liquid separating tank. The top of the outer arc cover of the feeding and discharging chamber is provided with a chassis drive, a driving gear of which is meshed with the chain (tooth) drive belt, of the bin group. The bottoms of all isolating walls of the methane tank (group) are on the same horizon. A communicating opening of the hydraulic liquid-regulating tank and the feeding and discharging chamber is as high as (higher than) the bottom of the isolating wall. Escape pipes of all air generating and storing chamber of the annular methane tank group communicate with one another. The inner wall of the circular methane tank and the inner or outer circular wall of the annular methane tank group are provided with temperature regulating tube. The outer wall of the whole methane tank (group) and the external of the cover top are wrapped and bounded with insulating layers.