Abstract:

The strategic goal of “peaking carbon emissions and achieving carbon neutrality” shows China's responsibility as a major country to address global climate change issue, and its commitment to realizing a community of shared future for mankind and accelerating the course of energy-saving and emission-reduction. This study took a project with a daily output of 20,000 cubic meters of biogas as a case and used the method of life cycle assessment (LCA) to evaluate its environmental impact. The study divided the entire life cycle into three stages: raw material collection and pretreatment, medium-high temperature anaerobic fermentation and biogas resource utilization, and established an evaluation list for the biogas anaerobic fermentation project. The results show that the net production capacity of this biogas project can reach 2494064.6 kg/a. Compared with traditional coal power generation, its ability to reduce environmental impact is 234.9038 kpt/a, and the reduction rate is 32.89%. The study proves that the biogas project has productivity benefits and environmental benefits. Based on the current development situation of the biogas industry at home and abroad, and the opportunities and challenges under the vision of “peaking carbon emissions and achieving carbon neutrality”, this study shows that China's future biogas industry has great potential for development.

Key words: biogas, peaking carbon emissions, achieving carbon neutrality, environmental impact, development potential