Study of inactivation efficacy of pre-chlorination process safely enhanced by potassium permanganate

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  • 1. College of Civil Eng.and Architecture, Beijing University of Technology, Beijing 100022, China;
    2. School of Municipal and Environment Eng., Harbin Institute of Technology, Har bin 150090, China;
    3. Tianjin Waterworks Group Co., Ltd., Tianjin 300040, China

Received date: 2005-04-14

  Online published: 2010-10-01

Abstract

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.

Cite this article

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

References

[1] Rook J J.Formation of Haloforms during Chlorination of Nature Waters[J].J.Water Treat.Exam.,1974,23(2):234-243.
[2] Krasner S W,McGuire M J,Jacangelo J G,et al.The occurrence of disinfection by-products in US drinking water[J].J.AWWA,1989,81(8):41-53.
[3] Colthurst J M,Singer P C.Removing trihalomethane precursors by permanganate oxidation and manganese dioxide adsorption [J].J.AWWA,1982,74(2):78-83.
[4] 马军.高锰酸钾预氧化去除控制有机污染物的效能与机理[D].哈尔滨:哈尔滨建筑工程学院,1991.
[5] Yao K,Charles N H.Inactivation of E.Coli by Combined Action of Free Chlorine and Monochloramine[J].Water Research,1991,25(9):1 027-1 032.
[6] Straub T M,et al.Synergistic Inactivation of Escherichia Coli and MS-2 Coliphage by Chloramine and Cupric Chloride[J].Water Research,1995,29(3):811-818.
[7] Amy G L,Tan L,Davis MK.The Effects of Ozonation and Activated Carbon Adsorption on Trihalomethane Speciation[J].Water Research,1991,25(2):191-194.
[8] 李君文.氯化消毒时三卤甲烷的形成[J].环境保护科学,1994,20(1):5-8.
[9] 杨艳玲.高锰酸钾安全强化受污染水预氯化消毒技术研究[D].哈尔滨:哈尔滨工业大学市政与环境工程学院,2003.117-125.

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