NOVELTY - A bi-phase anaerobic reactor of zero-valent iron comprises a cylinder-shaped anaerobic hydrolysis acidification reactor (1), a water inlet pump (2), a regulating pool (4), a circulating pump (5) and an anaerobic methane generation reactor (6). The lower part of the anaerobic hydrolysis acidification reactor is connected with the water inlet pump through a water inlet pipeline. The middle of the anaerobic hydrolysis acidification reactor is provided with 2-4 zero-valent iron filling layers (3).    USE - Bi-phase anaerobic reactor of zero-valent iron.    ADVANTAGE - The reactor effectively reinforces the organic substance decomposing ability in the anaerobic hydrolysis acidification pool, promotes the formation of acetic acid easily used by methane production bacteria at the back stage, and realizes the regulation of the hydrolysis acidification process. It is structured simply and reasonably, the working performance is high, the disadvantages of difficult starting and easy acidification of the anaerobic reactor are solved, and the acid producing ability and the methane producing ability are higher than those of the same type of reactor.    DETAILED DESCRIPTION - A bi-phase anaerobic reactor of zero-valent iron comprises a cylinder-shaped anaerobic hydrolysis acidification reactor (1), a water inlet pump (2), a regulating pool (4), a circulating pump (5) and an anaerobic methane generation reactor (6). The lower part of the anaerobic hydrolysis acidification reactor is connected with the water inlet pump through a water inlet pipeline. The upper part of the anaerobic hydrolysis acidification reactor is connected with the regulating pool through a water outlet pipeline. The circulating pump inputs the sewage in regulating pool to the anaerobic methane generation reactor through the water inlet pipeline. The middle of the anaerobic hydrolysis acidification reactor is provided with 2-4 zero-valent iron filling layers (3).    DESCRIPTION OF DRAWING(S) - The drawing is a schematic view of the bi-phase anaerobic reactor.    Cylinder-shaped anaerobic hydrolysis acidification reactor (1)    Water inlet pump (2)    Zero-valent iron filling layers (3)    Regulating pool (4)    Circulating pump (5)    Anaerobic methane generation reactor (6)