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二氧化氯杀灭小球藻

Keywords: 二氧化氯,小球藻,影响因素

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Abstract:

实验研究了二氧化氯投加量、小球藻的初始浓度、pH、有机物和氨氮含量对ClO2杀灭来自于水库水的小球藻的影响,考察了ClO2氧化与混凝工艺结合时去除小球藻的效果并对工艺条件进行优化。结果表明,ClO2在投加量1.1mg/L下,接触10min,小球藻的杀灭率为71.93%。小球藻的杀灭率随着ClO2投加量的增大和藻初始浓度的升高而提高,随水中有机物含量的增加而显著降低,氨氮含量对小球藻杀灭的效果影响很小。在酸性条件和碱性条件下,小球藻的杀灭率均随pH升高而急剧下降,而在中性至弱碱性区间内,藻的杀灭率随pH升高而缓慢下降。对于某以小球藻为优势藻的供水水库源水,ClO2氧化与混凝工艺结合,藻的去除率高达98.47%。除藻的最佳工艺条件为:二氧化氯投加量为0.5mg/L,聚合氯化铝为5mg/L,二氧化氯与混凝剂同时投加。

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