结合国内外大中型沼气工程情况，以德青源沼气工程为例，介绍了农村废弃物变废为宝的工艺流程，提供了农村能源解决方案，并结合我国沼气工程现有问题提出几点建议，以使大中型沼气工程走向规范化。

Combining the large and medium scale biogas project at home and abroad, taking the Beijing Deqingyuan Biogas Project as an example, the process that can turn the rural waste into treasure was introduced, and rural energy solutions were project. Combining with existing problems of biogas project, several recommendations to make the large and medium biogas project to be standardization were also put foward.