沼气池能安全越冬可以常年产气。具体做法是:一、霜降之前初步防寒要将沼气池进、出料口用塑料布罩上,早晚加盖草苫子。可用草把子堵塞进料口,以免进、出料口冷气流通,散失池内热量。池体上面用树叶、格荛、毛草、锯末等覆盖30公分厚,上边再压一层泥土。二、立冬前后完全防寒柴草覆盖法:沿池体及进、出料口周围1米左右处(相当冻土层 Digesters can be safe winter to produce gas perennial. The specific approach is: First, before the frost drop to the preliminary biogas digester into the discharge port covered with plastic sheeting, sooner or later stamped grass prickly heat. Grass can be used to block the feed inlet, so as to avoid the inlet and outlet air circulation, loss of heat in the pool. Above the pool body with leaves, lattice grits, Mao grass, sawdust and other cover 30 cm thick, and then pressure on top of a layer of soil. Second, before and after the winter completely firewood cover law: along the pool body and into the discharge port around 1 m (rather frozen soil layer