Patent ID: 8758616

Claim:
A two-phase anaerobic reactor enhanced by zero-valent iron (ZVI) consists essentially of an anaerobic hydrolysis-acidification tank ( 1 ) equipped with ZVI-filling layer ( 3 ), and an anaerobic methanogenesis tank ( 6 ), wherein the effluent of hydrolysis-acidification tank ( 1 ) flows to a middle tank ( 4 ) and then is fed in anaerobic methanogenesis tank ( 6 ) using a pump ( 5 ), the influent for hydrolysis-acidification tank ( 1 ) is also delivered by a pump ( 1 ), and the reactor is featured as follows: 2˜4 ZVI-filling layers ( 3 ) are set in the middle of the hydrolysis-acidification tank ( 1 ) to accelerate acidification of organics and produce more acetate beneficial for the subsequent methanogenesis and, after the enhanced hydrolysis acidification tank ( 1 ), the wastewater is transported into the methanogenic tank ( 6 ).