沼气的综合利用是指沼气及其发酵物（沼液、沼渣）作为生产活动的原料、肥料、添加剂和能源等，进行再利用。 利用沼气进行气体施肥。由于大棚或温室内空气流通不畅，致使二氧化碳供应不足，进而影响植物的光合作用。如把沼气通人种植蔬菜的大棚或温室内燃烧，利用沼气燃烧产生 The comprehensive utilization of biogas means that biogas and its fermented products (biogas slurry and biogas residue) are used as raw materials, fertilizers, additives and energy for production activities for reuse. Use biogas for gas fertilization. Due to poor circulation of air in greenhouses or greenhouse, resulting in insufficient supply of carbon dioxide, thereby affecting the photosynthesis of plants. Such as biogas through planting greenhouses or greenhouse combustion, the use of biogas combustion