某水厂水处理工艺对天然有机物的去除及相关性分析

Removal and Correlation Analysis of NOM in Water Treatment Process of a Waterworks

天然有机物(NOM)在地表水中广泛存在,给饮用水处理带来了很大的挑战。本文针对太湖贡湖湾饮用水源,采用多种检测手段考察了某水厂现行工艺对太湖贡湖湾原水中有机物去除情况。结果表明,试验期间常规处理段对COD_(Mn)的去除率为48.8%,对DOC的去除率为29.5%,而深度处理段对COD_(Mn)去除率为13.7%,DOC为18.6%;预氯化去除有机物的效果非常明显,混凝、沉淀依然是去除有机物贡献率最大的阶段。整个工艺对络氨酸类蛋白有机物、色氨酸类蛋白有机物的去除率分别为68.7%~75.8%、62.1%~77.8%。各有机物指标呈现一定的正相关,但未见明显线性相关。

Natural organic matter （NOM） is widely present in surface water, bringing a lot of challenges to drinking water treatment. Aiming Tai Lake Bay tribute drinking water sources, using a variety of detection methods investigated the removal of organic matter in raw water conditions treated by various process units of one waterworks.The results show that the removal rate of CODMn and DOC was about 48.8% and 29.5%, respectively, during conventional processes, while that of the advanced processes was 13.7% and 18.6%, respectively. The effect of pre-chlorination on organic matter removing was obvious. Coagulation and sedimentation processes removed the most of organic matter. The removal rate of organic matter like protein tyrosine, tryptophan can be 68.7%-75.8%and 62.1%-77.8%, respectively.There is a positive correlation between the index of organic matters, but no significant linear correlation.