据辽宁的经验,只要沼气越冬管理方法得当,沼气池不仅能安全越冬,而且能大大延长产气时间。一、掌握适宜的防寒时间由降温快的深秋开始,就应着手防寒,按农时霜降之前做好初步防寒。立冬前后,当昼夜温差相等的日子里,必须达到完全防寒。初步防寒:要将沼气池进、出料口用塑料布罩上,早晚还要加盖草苫子。进料口未和厕所、猪圈结合的,可将草把子堵塞进料口,以免进、出料口冷气穿流,散失池内热量。池体上面要用树叶、格挠、毛草、锯末等软物质,覆盖30厘米厚,其上用塑料布或泥土盖上。完全防寒:方法有下述四种。二、沼气池越冬防寒方法(1)柴草复盖法:沿池体及进、出料口周围一米左右处(相当冻土层深度),挟砌围墙。里面用软物质如树叶、毛草、格挠、谷壳、酒糟、锯末等将池顶全部复盖,厚度30～ According to Liaoning’s experience, as long as biogas overwintering management methods properly, digesters not only safe and wintering, but also greatly extend the gas production time. First, to master the appropriate cold time from the rapid fall in the late autumn, it should start cold, early frost before farming to make a preliminary cold. Before and after winter, when the temperature difference between day and night the same day, must be completely cold. Preliminary cold: biogas digesters into the discharge port with plastic cloth cover, sooner or later, but also stamped grass prickly heat. Feeding port is not and toilets, pigsty combination, the grass can be blocked feed lever mouth, so as not to enter the discharge port air-through, loss of heat in the pool. Pool above the leaves, grid scratch, grass, sawdust and other soft substances, covering 30 cm thick, covered with plastic sheeting or soil. Completely cold: the following four methods. Second, biogas overwintering cold method (1) firewood cover method: along the pool and into the discharge port around a meter (quite the depth of permafrost) relying on the wall. Inside with soft materials such as leaves, grass, grid scratch, chaff, distiller’s grains, sawdust, etc. will be all covered the top of the pool, the thickness of 30 ~