Due to the influence of dietary structure, the stock of live pigs in China has reached hundreds of millions, and the breeding volume of cattle, sheep, poultry, and other livestock is also very large. The total discharge of livestock manure is huge.

同时，工业的不断发展，工业有机废水排放量也十分惊人。如果再考虑酒糟液、城市垃圾填埋和污水处理产生的沼气等因素，我国沼气资源潜力将进一步扩大，沼气发电的前景十分开阔。 同时，我国广大农村生物质资源非常丰富，农村电气化，沼气发电是一个很重要的途径。

At the same time, with the continuous development of industry, the discharge of industrial organic wastewater is also astonishing. If we consider factors such as distiller's grains liquid, biogas generated from urban garbage landfill and sewage treatment, the potential of biogas resources in China will be further expanded, and the prospects for biogas power generation are very broad. At the same time, China's vast rural areas are rich in biomass resources, and solving rural electrification and biogas power generation is a very important way.

但是，大中型沼气工程与沼气发电工程的一次性投资费用都相当大，而沼气工程投资费用是沼气发电工程的4倍左右。只有在推广沼气工程应用的同时，不断进行研究提高沼池产气率，并积极推广应用沼气发电工程，才能在社会效益尽量保持不变的前提下，使经济效益不断提高，也才能使整个工程总的一次性率大大提高。

However, the one-time investment cost of large and medium-sized biogas projects and biogas power generation projects is quite high, and the investment cost of biogas projects is about four times that of biogas power generation projects. Only by continuously researching and improving the biogas production rate while promoting the application of biogas engineering, and actively promoting the application of biogas power generation engineering, can the economic benefits be continuously improved while maintaining the same social benefits as much as possible, and the overall one-time investment return rate of the entire project be greatly improved.

此外，沼气发动机发电与发动机余热利用综合热效率比任何其他热动力设备或装置的热效率都高。进行沼气发电即使民用，也可以将电通过电缆输送到每家每户，提前实现全部家用设备电气化，既方便又干净。用不完的电还可以并入电网中，这是科学、合理、应用沼气能源的途径。 政策促进产业发展 目前，我国沼气发电工程数量较少，装机规模较小，发展速度比较缓慢。原因是多方面的，但主要的原因是现有机制严重制约沼气发电的发展。，我国尚未建立严格的环境污染处罚体系，禽畜粪便和工业有机废水超标排放的企业不需要为自身造成的环境污染等支付相应的成本，致使企业缺乏投资沼气工程治理污染的积极性；其次，目前沼气发电工程建设规模一般较小，潜在的电站数量较大，电网运行管理成本较高，属于典型的分布式发电。我国目前尚缺乏大规模分布式电站运行管理的经验，致使沼气发电的并网和售电遇到许多困难。

In addition, the comprehensive thermal efficiency of biogas engine power generation and engine waste heat utilization is higher than that of any other thermal power equipment or device. Even for civilian use, biogas power generation can be transmitted to every household through cables, achieving electrification of all household equipment in advance, which is both convenient and clean. Unused electricity can also be integrated into the power grid, which is a scientific, reasonable, and efficient way to apply biogas energy. At present, the number of biogas power generation projects in China is relatively small, the installed scale is relatively small, and the development speed is relatively slow. The reasons are multifaceted, but the main reason is that the existing mechanisms seriously restrict the development of biogas power generation. Firstly, China has not yet established a strict environmental pollution punishment system, and enterprises that discharge excessive amounts of livestock manure and industrial organic wastewater do not need to pay corresponding costs for environmental pollution caused by themselves, resulting in a lack of enthusiasm for investing in biogas engineering to control pollution; Secondly, currently, the construction scale of biogas power generation projects is generally small, with a large number of potential power stations and high operating and management costs for the power grid, making them typical distributed power generation. At present, China lacks experience in the operation and management of large-scale distributed power plants, resulting in many difficulties in the grid connection and sales of biogas power generation.

沼气发电工程是的工程，受益的是全社会，基于目前沼气发电工程还存在的问题，因此工程应由政府、地方和企业共同出资建立。对于还处于起步阶段的新兴项目，应给予一定支持，如：政府应制定一系列的优惠政策，减免工程税费，减轻企业负担；行业要广辟资金渠道，帮助建设方获得各类贷款；同时加大宣传力度，鼓励社会各界以各种形式投资开发沼气发电项目，以优惠政策调动各投资主体的积极性。

The biogas power generation project is an energy-saving and environmentally friendly project that benefits the entire society. Based on the existing problems of biogas power generation projects, the project should be jointly funded and established by the government, local governments, and enterprises. For emerging environmental protection projects that are still in their early stages, the government should provide certain support. For example, the government should formulate a series of preferential policies to reduce project taxes and reduce the burden on enterprises; The industry should broaden its funding channels and help construction companies obtain various types of loans; At the same time, we will increase publicity efforts and encourage all sectors of society to invest and develop biogas power generation projects in various forms, mobilizing the enthusiasm of various investment entities through preferential policies.

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