以滦河水为处理对象，考察了混凝-微滤工艺对原水中营养物的去除效果和对饮用水生物稳定性的影响。该工艺对DOC的去除率随混凝剂投加量的提高而增加，在FeCl3投加量为2mg/L时，DOC的平均去除率达到22.4%。该工艺可有效去除可生物降解溶解性有机碳（BDOC）和总磷，并分别达到饮用水生物稳定性的阈值要求（BDOC<0.20-0.25mg/L和TP<5μg/L）；同时,工艺出水的细菌再生长潜力（BRP）比原水降低1个数量级。因此采用混凝-微滤工艺可有效提高饮用水的生物稳定性，控制水中细菌再生长趋势。

A pilot study was done to evaluate the impact of the coagulation-microfilter process on reduction of nutrient levels and on the biostability of treated water. The DOC removal efficiency increased with the increase of coagulant dosing, while the average DOC removal reached to 22.4% with adding 2mg/L FeCl3 as coagulant. In addition, Biodegradable Dissolved Organic Carbon (BDOC) and Total Phosphate (TP) could be removed effectively and the BDOC and TP in effluent were below the threshold of bio-stability, which is 0.20-0.25mg/L and 5μg/L respectively. And the Bacterial Regrowth Potential (BRP) of the effluent could be degraded by 1 LOG. The results show that the coagulation- microfilter process is effective to improve the bio-stability of drinking water and to control the bacterial regrowth potential.

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