压力表指针上升很慢,一时弄不清是产气少,还是漏气,该怎么办?

2025-04-06 23:13:18
推荐回答(1个)
回答1:

可用正负压测定。把沼气池中沼气全部放掉,在导气管处临时装一个U型压力表。从水压间内取出沼液,使沼气池内变成负压。如果沼气池有漏的地方,池内沼气不会漏出来,只会把池外的空气吸进去。再过24小时,把取出的沼液如数倒入水压间内,观察压力表水柱上升高度。如果与第一次水柱高度相同,说明不漏气而是产气慢;如果比第一次高了许多,说明沼气池漏气。
同时对输气系统进行试压检查。如系统漏气,应检查出漏气处,进行修理;如属产气慢,一是发酵原料不足,浓度太低,产气少,或虽然原料多,但原料不新鲜,营养元素已经消化完,使沼气细菌得不到充足的营养条件;二是池内的阻抑物浓度超过了微生物所能忍受的极限,使沼气细菌不能正常生长繁殖,这就要补充新鲜发酵原料或者大换料;三是原料搭配不合理,人、畜粪便(干物质)太少。

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