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PetroChina has built the first straw-based bio-natural gas pilot base. The daily biogas production exceeds 2,000 cubic meters. The main efficiency indicators are leading domestically and internationally. On June 6, PetroChina's first straw-based bio-natural gas pilot base settled in Daqing Oilfield has stable production and operation. The daily biogas production reaches more than 2,000 cubic meters. The methane content is higher than 50%. The purity of bio-natural gas is higher than 95%. The production efficiency is* * 4 times the standard, and the main efficiency indicators are at the leading level at home and abroad. Daqing Oilfield According to 2019 * * The National Development and Reform Commission and the Energy Bureau jointly issued the "Guiding Opinions on Promoting the Industrial Development of Bio-Natural Gas" issued by ten ministries and commissions. In accordance with PetroChina's requirements of "accelerating the scientific and technological development of new energy, new materials and new undertakings", we actively promote the construction of the bio-energy industry, focus on the development of bio-natural gas, and create a bio-economy pilot area with the characteristics of the group company. In June 2021, the construction of a 500 cubic meter microbial anaerobic fermentation system device and supporting projects in Daqing Oilfield started, and the pilot project was completed in November of that year. At the beginning of this year, Daqing Oilfield established a special work team to develop high-temperature dry continuous anaerobic fermentation technology, built a pilot production line with a tank capacity of 500 cubic meters, cultivated and screened high-temperature anaerobic strains for bio-natural gas produced from straw, and mastered the rules between inoculation time and inoculation amount. This technology gets * * Experts from the Ministry of Agriculture and Rural Affairs recognized that the relevant technical equipment has achieved efficient gas production and is in line with the future development trend of biomass anaerobic fermentation. Bionatural gas is produced from organic waste such as crop straw and livestock manure as raw materials through anaerobic fermentation, purification and purification. The biogas slurry produced during the fermentation process can be used to produce organic fertilizer and then returned to the field and applied to the soil, which has the characteristics of green, low-carbon and clean. In 2021, Daqing City had a total of 11.49 million acres of cultivated land, accounting for about 5% of the total cultivated land area in Heilongjiang Province. Among them, the corn planting area reaches 7.09 million acres, and the straw stock is huge. Promoting the development of the bio-natural gas industry can create considerable economic benefits and reduce environmental pollution.