一、沼气集中供应是农村能源供应模式的重要发展以气体燃料取代固体燃料用于城市和农村是世界范围内常规能源结构变化的共同趋势。一些工业发达国家依靠石油天然气工业的优势,或依靠进口,以天然气和液化石油气来气化城市及农村。在这些国家,天然气 First, the centralized supply of biogas is an important development of the rural energy supply mode. The replacement of solid fuels with gas fuel in urban and rural areas is a common trend of changes in the conventional energy structure in the world. Some industrialized countries rely on the advantages of the oil and gas industry or rely on imports to gasify cities and rural areas with natural gas and liquefied petroleum gas. In these countries, natural gas