One of the moft effective solutions for minimizing the volume of the waste to be stored is the production of energy and compost from biomass. With this method, the climate change effect of landfill areas is eliminated and the global CO2 reduction is promoted. Organic wastes such as vegetables, fruits and garden wastes which comprise 50% of domestic solid wastes are sorted in our plants and processed in anaerobic digesters where methane gas and high quality compost are produced under optimum conditions under which the digestion process is accelerated. The methane gas is stored in balloons after which it is transformed to electrical energy in motor/generator units. Compared to other systems in the world, the system in Mamak is distinguished in that it allows the treatment of mixed organic waste which is a sustainable solution for the waste characteristics of Turkey.