化学前处理——改善城市污水污泥厌氧消化处理的有效途径

Chemical Pretreatment——A Effective Method for Improvement of Anaerobic Digestion of Municipal Sewage Sludge

城市污水污泥在厌氧消化时，时间长，且产气量较低。利用化学试剂ＮａｏＨ或Ｃａ（ＯＨ２）对污泥进行前处理，可以促进污泥水解，使之易于消化，从而提高污泥的消化效率。本文介绍了化学前处理方法的基本原理，分析了化学前处理对产气率、甲烷产率、ｐＨ值、基质去除率等方面的有益影响以及化学药剂的投加量。

It usually needs along period to anaerobically digest sewage sludge and the rate of biogas production is relatively low.The pretreatment of sluge with chemicals of NaOH or Ca(OH) 2 can improve the sludge solu bilization and the digestion efficiencies.This paper described the fundamental mechanism of the chemical pretreatment of sludge and the benefical effects on the digestion process.