Integrated system methanogenic anaerobic reactor and membrane bioreactor for the removal of organic matter and nitrogen in wastewater

integrated anaerobic reactor methanogenic and membrane bioreactor and process for removal of organic matter and nitrogen in urban or industrial waste water, preferably with COD concentrations between 150 and 5000 mg / L and system where deletions of total nitrogen that produced are between 15 and 50 mg / L, at temperatures above 15 ° C. The waste water depuration takes place through three treatment stages: stage anaerobic methanogenic stage anoxic biofilm and suspended biomass and filtration step aerobic biofilm and suspended biomass.