对水质净化过程中投加净化剂的效果进行了研究，得出了在冬春低温低浊季节，水力循环澄清池-快滤池净化过程投加净化剂脱混的最佳选择。

The effects of adding purifying agent during the process of water purification were studied. The best opportunity for applying purification agent to water during purification process was obtained.

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