纯种发酵所用的压缩空气,要求无菌,一般都是空气压缩以后,经冷却分水,无菌过滤,然后引入发酵缶。但在有关去水系统不够完善,或大气所含水份过多系统不能负担时,就会出现析出的水不能排出系统造成无菌过滤器积水而失效。也有在排水口以后,管道或设备暴露在大气中,因气湿低,进一步冷却了压缩空气而造成再析出水份. Compressed air used in purebred fermentation, requiring sterility, are generally compressed air, the cooling watershed, sterile filtered, and then the introduction of fermentation 缶. However, when the drainage system is not perfect or the system is too heavy for the water contained in the atmosphere, the precipitated water can not be discharged out of the system and cause failure of the sterile filter. There are also in the drain after the pipes or equipment exposed to the atmosphere, due to low humidity, further cooling the compressed air caused by the re-precipitation of water.