沼氣發電機的原理是用沼氣作為燃料進行發電，通過垂直植入垃圾堆體里若干根抽氣井，不間斷將沼氣抽出。

The principle of biogas generator is to use biogas as fuel for power generation, and continuously extract biogas by vertically implanting several extraction wells into the garbage heap.

經過收集管網送至發電機機組，再經過冷卻脫硫脫水、過濾凈化等處理后，產生的純沼氣在發電機組里燃燒發電。

After being collected through the pipeline network and sent to the generator unit, the pure biogas produced is then cooled, desulfurized, dehydrated, filtered and purified, and burned in the generator unit for power generation.

在我國沼氣發電機分為單燃料沼氣發電機及部分使用沼氣的雙燃料沼氣。

In China, biogas generators are divided into single fuel biogas generators and some dual fuel biogas generators that use biogas.

單燃料沼氣發電機組：不需要輔助燃料油及其供給設備，燃料為一個系統，在控制方面比可燒兩種燃料的發電機組簡單且價格較低。

Single fuel biogas generator set: does not require auxiliary fuel oil and its supply equipment, the fuel is a system, and in terms of control, it is simpler and cheaper than a generator set that can burn two types of fuels.

雙燃料沼氣發電機組：用液體燃料或氣體燃料都可以，對沼氣的產量和甲烷濃度的變化能夠適應，用氣體燃料轉為用柴油燃料在停止工作后，機組內不殘留未燃燒的氣體，因為耐腐蝕性好。

Dual fuel biogas generator set: It can use both liquid fuel and gas fuel, and can adapt to changes in biogas production and methane concentration. When using gas fuel to switch to diesel fuel and stop working, there is no residual unburned gas in the unit because it has good corrosion resistance.

沼氣發電機優點是燃料比較方便而且環保又便宜，各種畜禽等糞便都可以做燃料。

The advantage of biogas generators is that the fuel is relatively convenient, environmentally friendly, and cheap, and various animal manure can be used as fuel.

有優點也有缺點，前期投資較大還要有足夠的沼氣發酵原料，對于北方天氣，冬天寒冷就不怎么好用了，在低溫時發酵太慢就會無法帶動發動機。

There are both advantages and disadvantages. In the early stage, there is a large investment and sufficient biogas fermentation raw materials. For northern weather, it is not very useful in the cold winter. If the fermentation is too slow at low temperatures, it will not be able to drive the engine.