沼气的组成成分主要包括甲烷、二氧化碳和少量的硫化氢、氢气、一氧化碳、氮气等。其中,甲烷占50%~70%,二氧化碳占30%~40%,其他气体含量极少。户用秸秆沼气生产技术是一种以现有农村户用沼气池为发酵载体,以农作物秸秆为主要发酵原料的厌氧发酵沼气生产技术。一、技术操作要点1.秸秆收集与粉碎户用秸秆沼气的原料主要为玉米秸秆、小麦秸秆和水稻秸秆等。常见户用秸秆沼气的原料量为:6立方米的沼 Biogas components mainly include methane, carbon dioxide and a small amount of hydrogen sulfide, hydrogen, carbon monoxide, nitrogen and so on. Among them, methane accounted for 50% to 70%, carbon dioxide accounted for 30% to 40%, other gas content is minimal. Household straw biogas production technology is an anaerobic fermentation biogas production technology that uses the existing rural household biogas digester as the fermentation carrier and the crop straw as the main fermentation raw material. First, the technical points of operation 1. Straw collection and crushing Household straw gas is mainly corn stalks, wheat straw and rice straw and so on. The amount of raw materials for common household straw biogas is 6 cubic meters of marsh