NOVELTY - A methane reactor unit (1) is installed between acidification tank (2) and carbon dioxide converter (3), and liquid pump (10) installed on liquid material distribution pipe (21) connected between inlet opening (32) and outlet opening (33). A heat absorbing material (35) is directly covered on the methane reactor unit, to absorb heat energy and to protect the reactor unit from direct sunlight. A gas valve (13) and a water supply valve (14) are installed on bottom of the carbon dioxide converter.    USE - Reactor used in production of methane from organic matters e.g. organic sewage, excrement of human and livestock, straws of crops, and other waste products.    ADVANTAGE - The reactor can be effectively manufactured in factory, and can be easily folded and conveniently transported.    DETAILED DESCRIPTION - The reactor unit has gas-water separator (4) installed on outlet opening, and water seal (39) installed between the outlet opening of the reactor unit and gas-water separator. A gas pipe (19) connects the reactor unit with the carbon dioxide converter, and connects the converter with gas appliances such as fuel cell or gas generator (28). The enforced cycle of the liquid pump accelerates the production of methane gas. The carbon dioxide converter eliminates the carbon dioxide and sulphide in the methane gas. The production of methane is performed in three processes such as acidification of ferment raw material, production of methane gas, and purification of methane gas.    DESCRIPTION OF DRAWING(S) - The drawing shows the explanatory view illustrating the structure and arrangement of components of the reactor.    Methane reactor unit (1)    Acidification tank (2)    Carbon dioxide converter (3)    Gas-water separator (4)    Liquid pump (10)    Gas valve (13)    Water supply valve (14)    Gas pipe (19)    Liquid material distribution pipe (21)    Gas generator (28)    Inlet opening (32)    Outlet opening (33)    Heat absorbing material (35)    Water seal (39)