The treatment of low temperature and turbidity raw water became one of primary intentions in water works. A full - scale study with conventional process was carried out to investigate the removal of turbidity and organic matters by changing coagulant. The result showed ferric chloride (PAFC) instead of polyaluminum chloride (PAC) could reduce 1/3 of the activated silicate coagulant aid dosage and the turbidity was under the limitation of 1 ntu. Meanwhile, the removal rates of DOC and SUAV was increased by 7. 1% and 6. 2% respectively. It was found that PACF has an obvious predominance for the treatment of low temperature and turbidity raw water. The information obtained from this work could provide technological support for production.%通过改变混凝种类的方法,对饮用水常规处理工艺去除浊度和有机物进行了低温低浊原水的生产性试验.试验结果表明,采用聚合氯化铝铁(PACF)替代聚合氯化铝(PAC),可以降低1/3的助凝剂活化硅酸投加量,同时可保证出厂水浊度小于1 ntu.采用聚合氯化铝铁可对DOC的去除率提高7.1％,对SUVA值的去除率提高6.2％,消毒副产物和残留率均在标准限值以内,但成本仅提高了0.013 5元.聚合氯化铝铁对于低温低浊原水的处理具有显著的优势,是提高常规处理工艺除污染的有效途径之一.
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