Study of inactivation efficacy of pre-chlorination process safely enhanced by potassium permanganate
Received date: 2005-04-14
Online published: 2010-10-01
Pre-chlorination process is a conventional and widely applied pre-oxidation technique.But a great quantity of disinfection byproducts are produced easily which are harmful to human health and the inactivation effect decreases which is not beneficial to multiple barrier function,when it is applied to raw water with higher organic matters.Therefore,it is necessary to safely enhance the inactivation effect of pre-chlorination process when polluted raw water is pre-treated.The inactivation effect of combined application pre-treatment process with potassium permanganate and chlorine and the control function of trihalomethane (THMs) formation are investigated in both respect of microbial safety and chemical safety with polluted water.The results show that the inactivation effect of the combined application pre-treatment process with potassium permanganate and chlorine is clearly better than that of individual application with potassium permanganate or chlorine.It is confirmed by the Berenbaum formula calculation that potassium permanganate and chlorine are provided with synergism inactivation effect in respect of reduction of the microbial index.Compared with the pre-chlorination process with the same disinfectant dosage,the combined application pre-treatment process with potassium permanganate and chlorine is well-matched in inactivation efficacy,and the THMs production reduces over 60% in the respect of byproduct formation.This study provides a newapproach of safe pre-chlorination process for polluted water pre-treatment.
Li Xing, Yang Yanling, Zhang Yan, Li Guibai, He Wenjie, Han Hongda . Study of inactivation efficacy of pre-chlorination process safely enhanced by potassium permanganate[J]. Industrial Water Treatment, 2005 , 25(9) : 23 -26 . DOI: 10.11894/1005-829x.2005.25(09).23
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