In the current global context, the use of biomass is both an environmental necessity and an economic opportunity. Indeed, it opens new avenues for sustainable development: create jobs, reduce energetic and environmental constraints on the economy. The studies which our laboratory has done at the University City were able to show the socioeconomic importance of energy recovery from fermentation of organic waste collected locally. Indeed, we have able to assess a returns exceeding 500 litters of biogas per kilogram of organic matter and a potential of organic waste of more than one tonne per day. The energy produced can cover 100% of the energy needs of the kitchen and about 30% of energy needs for domestic hot water in the university residence of Oujda, which would reduce the cost of energy expenditure approximately 300000 Dirhams per year.