In Latin America, household digesters have been spreading since the 1980s in rural areas of tropical countries like Colombia and Costa Rica [9-11] and hilly regions of Peru and Bolivia [12,13]. The first experiences on digesters implementation at the Peruvian Andes date back to the 1980s, when the Universidad Nacional de Cajamarca (UNC) together with the NGO INTITEC carried out a project on the implementation of Chinese fixed dome digesters [14-16]. In 1988 there were almost one hundred fixed dome digesters of 10e12 m3 implemented in rural zones of the Department of Cajamarca [14,15]. Basic objectives of the biogas program were [15,17]: (i) to generate energy for cooking and lighting, satisfying household needs; (ii) to avoid deforestation and its effect on soil erosion; (iii) to reduce environmental pollution; and (iv) to improve household sanitation. When the program started there was a lot of interest in this novel technology, but after a few years people abandoned the digesters and the implementation of new household biogas plants turned off. A viability analysis pointed out that the program failure was mainly due to the high capital cost of fixed dome digesters; but also to social aspects, such as the lack of an appropriate management, family training and project monitoring[15].