沼气发电机的原理是用沼气作为燃料进行发电，通过垂直植入垃圾堆体里若干根抽气井，不间断将沼气抽出。

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.

经过收集管网送至发电机机组，再经过冷却脱硫脱水、过滤净化等处理后，产生的纯沼气在发电机组里燃烧发电。

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.

在我国沼气发电机分为单燃料沼气发电机及部分使用沼气的双燃料沼气。

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

单燃料沼气发电机组：不需要辅助燃料油及其供给设备，燃料为一个系统，在控制方面比可烧两种燃料的发电机组简单且价格较低。

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.

双燃料沼气发电机组：用液体燃料或气体燃料都可以，对沼气的产量和甲烷浓度的变化能够适应，用气体燃料转为用柴油燃料在停止工作后，机组内不残留未燃烧的气体，因为耐腐蚀性好。

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.

沼气发电机优点是燃料比较方便而且环保又便宜，各种畜禽等粪便都可以做燃料。

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.

有优点也有缺点，前期投资较大还要有足够的沼气发酵原料，对于北方天气，冬天寒冷就不怎么好用了，在低温时发酵太慢就会无法带动发动机。

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.