NOVELTY - An efficient two-phase integrated anaerobic reactor comprises a cylindrical tank body (1), which is divided into a first anaerobic reaction area (3) and a second anaerobic reacting area (4) by a cylindrical inner separator (2) with an overflow weir (15) at upper side of the tank body. A three-phase separator (5) and an air collecting pipe (6) are arranged on the tank body. A water distributor (11) is arranged below the first anaerobic reacting area. A spiral stirrer (12) and a heater (13) fixed by the supporting rod (14) are mounted in the first anaerobic reacting area.    USE - Efficient two-phase integrated anaerobic reactor.    ADVANTAGE - Acid and methane are separated. The heating is carried out in the first anaerobic reacting area. The second anaerobic reacting area is heated by the substrate and the heat transfer, thus improving activity of the microorganism in the reacting area, speeding up anaerobic hydrolysis acidification and methane generation, and improving processing efficiency of the system.    DETAILED DESCRIPTION - An efficient two-phase integrated anaerobic reactor comprises a cylindrical tank body (1), which is divided into two concentric cylinders by a cylindrical inner separator (2), where inner side of the inner separator is a first anaerobic reaction area (3) while the inner surface of the tank body and the outer side of the inner separator form a second anaerobic reacting area (4). A three-phase separator (5) and an air collecting pipe (6) are arranged on the tank body. The three-phase separator collects air by the air collecting pipe. A water inlet pipe (7) and a mud draining pipe (9) are mounted at two sides of the lower part of the first anaerobic reacting area. A draining pipe (8) and a second mud draining pipe (10) are mounted at the two sides below the second anaerobic reacting area. A water distributor (11) is arranged below the first anaerobic reacting area. A spiral stirrer (12) and a heater (13) fixed by the supporting rod are mounted in the first anaerobic reacting area. An overflow weir (15) is arranged at the upper part of the inner separator.    DESCRIPTION OF DRAWING(S) - The drawing is a schematic diagram illustrating the efficient two-phase integrated anaerobic reactor.    Tank body (1)    Separator (2)    First anaerobic reaction area (3)    Second anaerobic reacting area (4)    Three-phase separator (5)    Air collecting pipe (6)    Water inlet pipe (7)    Draining pipe (8)    Mud draining pipe (9)    Mud draining pipe (10)    Water distributor (11)    Stirrer (12)    Heater (13)    Overflow weir (15)