黑龙江省望奎县沼气能源利用由来已久。以往,在北方高寒地区沼气只能在夏季利用,冬季由于地温低,池内料液不能正常发酵导致产气量少甚至不产气。2003年冬季,该县对“双池”技术进行了科学测试,结果表明室外温度在-20℃以下时,室内池温仍达到20℃以上。 Wangkui County, Heilongjiang Province biogas energy use for a long time. In the past, biogas in the alpine region of the north could only be used in summer, and in winter, due to the low ground temperature, the liquid in the pool could not be fermented normally, resulting in less or no gas production. In the winter of 2003, the county conducted a scientific test on the “double-pool” technology. The results show that the indoor pool temperature still reaches above 20 ° C when the outdoor temperature is below -20 ° C.