沼气发电机组是专门利用有机废弃物厌氧发酵产生的沼气进行发电的装置，是分布式可再生能源的重要代表。其主要燃料来源于大型养殖场畜禽粪便、城市污水处理厂污泥、餐厨垃圾及垃圾填埋场等。在发电前，沼气必须经过严格的预处理，包括脱硫、脱水和除硅氧烷等，以保护发动机免受腐蚀。

Biogas generator set is a device that specifically utilizes the anaerobic fermentation of organic waste to produce biogas for power generation, and is an important representative of distributed renewable energy. Its main fuel sources include animal manure from large-scale breeding farms, sludge from urban sewage treatment plants, kitchen waste, and landfill sites. Before power generation, biogas must undergo strict pretreatment, including desulfurization, dehydration, and siloxane removal, to protect the engine from corrosion.

沼气发电机组的技术特点在于其出色的抗爆震性能，因为沼气中甲烷的辛烷值较高（105～115），允许发动机采用较高的压缩比。

The technical feature of biogas generator set lies in its excellent anti knock performance, as the octane value of methane in biogas is relatively high (105-115), allowing the engine to use a higher compression ratio.

此外，沼气中混有的少量二氧化碳反而有助于机组平稳运行。现代沼气发电项目多采用“热电联产（CHP）”模式，即发电的同时，回收发动机排出的高温烟气和冷却水中的余热，用于加热厌氧发酵池或为周边建筑供暖。这种模式可使综合能源利用率提升至70%以上。沼气发电机组不仅实现了废弃物的减量化、无害化和资源化，还大幅降低了温室气体排放，是推动农业与城市循环经济闭环的关键技术。

In addition, the small amount of carbon dioxide mixed in biogas actually helps the unit operate smoothly. Modern biogas power generation projects often adopt the "combined heat and power (CHP)" mode, which means that while generating electricity, the high-temperature flue gas emitted by the engine and the waste heat in the cooling water are recovered to heat anaerobic fermentation tanks or provide heating for surrounding buildings. This model can increase the comprehensive energy utilization rate to over 70%. Biogas generator sets not only achieve waste reduction, harmlessness, and resource utilization, but also significantly reduce greenhouse gas emissions, making them a key technology for promoting the closed-loop of agricultural and urban circular economy.