The actual work explain that through the anaerobic digestion of floating muds of residual water lagoons of oxidation of the Chepen city is possible to produce biogas, using for that a bioreactor where are fitted out the ambiental factors which permit the development and activity of microorganisms. The productions of biogas is possible thanks to the elevated concentration of biogradable organics matter the floating muds count with, reflected in their organic content that: are digested by a group of bacteria as the methanogenics amony the principals. To get establish the anaerobias conditions, it was designed and constructed a bioreactor of 3 liters of capacity in which was set 1.5 Kilograms of floating mud to begin the process of digestion. This bioreactor was hermetically closed, equipped with a device of pression measurement and a system for gathering and storaging of biogas at 45 days ...