沼氣發電機組是專門利用有機廢棄物厭氧發酵產生的沼氣進行發電的裝置，是分布式可再生能源的重要代表。其主要燃料來源于大型養殖場畜禽糞便、城市污水處理廠污泥、餐廚垃圾及垃圾填埋場等。在發電前，沼氣必須經過嚴格的預處理，包括脫硫、脫水和除硅氧烷等，以保護發動機免受腐蝕。

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.

沼氣發電機組的技術特點在于其出色的抗爆震性能，因為沼氣中甲烷的辛烷值較高（105～115），允許發動機采用較高的壓縮比。

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，沼氣中混有的少量二氧化碳反而有助于機組平穩運行。現代沼氣發電項目多采用“熱電聯產（CHP）”模式，即發電的同時，回收發動機排出的高溫煙氣和冷卻水中的余熱，用于加熱厭氧發酵池或為周邊建筑供暖。這種模式可使綜合能源利用率提升至70%以上。沼氣發電機組不僅實現了廢棄物的減量化、無害化和資源化，還大幅降低了溫室氣體排放，是推動農業與城市循環經濟閉環的關鍵技術。

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.