In the situation of energy shortage and higher environmental protection requirements, in order to achieve the goal of alleviating the imbalance between energy supply and demand, enriching and improving energy structure, reducing the consumption of non-renewable energy, improving the utilization rate of renewable resources and preventing waste from forming environmental pollution, it is necessary to strengthen the application of green energy such as biogas. Biogas purification technology is the key. Therefore, we should pay attention to the following points in developing biogas technology:

(1)完善可再生能源鼓励政策，针对沼气工程的能量多层次应用和物质循环应用，既产生节能减排的公益性又带来环境效益，政府应加大财政补贴和扶持力度，给予一些优惠政策，鼓舞开展；

(1) To improve the policy of encouraging renewable energy, in view of the multi-level application of energy and material recycling in biogas projects, which not only produces the public benefits of energy conservation and emission reduction, but also brings environmental benefits, the government should increase financial subsidies and support, and give some preferential policies to encourage the development;

(2)增强沼气工程新技术和新设备研发，进步效率，降低工程本钱。特别是合适偏僻地域和孤岛等地综合应用的小型沼气应用技术开发；

(2) Enhance the research and development of new technologies and equipment for biogas engineering, improve efficiency and reduce project cost. Especially suitable for the development of small-scale biogas application technology in remote areas and isolated islands.

(3)对多原料高浓度结合发酵技术研讨，保证产气原料充足，进步安装产气率。沼气工程向集中化、大型化的方向开展，进步工程经济性和能源效率；

(3) Discuss the technology of multi-raw material high concentration combined with fermentation to ensure sufficient raw materials for gas production and improve installation gas production rate. The biogas project should be carried out in the direction of centralization and large-scale, so as to improve the economy and energy efficiency of the project.

(4沼气综合应用技术开发，展开沼气提纯技术，可使沼气注入自然气网用做燃料，或替代汽油、柴油用于车辆，完成沼气应用高端化，进步能源效益。

(4) The development of comprehensive application technology of biogas and the development of biogas purification technology can make biogas injected into natural gas network as fuel or replace gasoline and diesel oil for vehicles to achieve high-end application of biogas and improve energy efficiency.

(5推行沼气乡村开展，前景非常宽广；

(5) Promoting biogas rural development has broad prospects;

(6yl6809永利技术开展相对较成熟，但仍有很多弊端，需进一步完善，防止形成二次污染，完成循环应用。

(6) Biogas desulfurization technology is relatively mature, but there are still many drawbacks, which need to be further improved to prevent secondary pollution and complete recycling application.

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