絮凝剂与消毒剂对水质化学稳定性的影响

The research on influence of water quality chemical stability by flocculant and disinfectant

我国珠江下游水源水质普遍呈现低碱低硬的特点,水质化学稳定性较差,具有一定的腐蚀性.采用二氧化碳与石灰联用再矿化工艺,能使水体达到水质化学稳定.传统的混凝、沉淀、过滤、消毒等工艺都会降低水质化学稳定性,且以混凝和消毒为甚.将着重考察常规水处理工艺中絮凝剂、消毒剂对碱度、pH以及水质化学稳定性指标的影响,并简要介绍了一种将上述影响定量的理论计算方法.将理论分析与实验数据进行对比,结果表明:理论计算值与实验结果的误差不超过3%,可以用于指导二氧化碳与石灰联用再矿化工艺.

The Zhujiang river downstream water quality presents the characteristics of low hardness and low alkality commonly,and the chemical stability of the water quality is poor,presenting a certain of corrosive.Adopting CO2 and lime coupled to remineralization process make the the water in the chemical stability level.Traditional process such as coagulation、precipitation、filtering、disinfection process reduce chemical stability,and coagulation and disinfection as the most serious.The influence was influenced,which of alkalinity、pH and chemical stability by the conventional water treatment agent such as flocculent and disinfectant,and a theoretical method was introduced that calculate the influence quantitatively.The results show that the error between theoretical calculation and experimental data is no more than 3%,and it can guide the practical use of CO2 and lime coupled to remineralization process