Effect of potassium permanganate dosing position on the performance of coagulation/ultrafiltration combined process

He Zhao; Liang Wang; Hongwei Zhang; Xiaona Wu; Bin Zhao; Fei Han

doi:10.1016/j.cjche.2017.03.037

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Effect of potassium permanganate dosing position on the performance of coagulation/ultrafiltration combined process

Separation Science and Engineering | Updated：2026-01-06

- Effect of potassium permanganate dosing position on the performance of coagulation/ultrafiltration combined process
- Chinese Journal of Chemical Engineering Vol. 26, Issue 1, Pages: 89-95(2018)
- Affiliations：
  
  1. 2 State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University,Tianjin,China,300387
  2. 3 School of Civil Engineering and Transportation, Hebei University of Technology,Tianjin,China,300401
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2017.03.037
  CLC：
- Published：2018
- Accepted：
Scan QR Code
He Zhao, Liang Wang, Hongwei Zhang, Xiaona Wu, Bin Zhao, Fei Han. Effect of potassium permanganate dosing position on the performance of coagulation/ultrafiltration combined process[J]. Chin.J.Chem.Eng., 2018, 26(1): 89-95.
DOI：

He Zhao, Liang Wang, Hongwei Zhang, Xiaona Wu, Bin Zhao, Fei Han. Effect of potassium permanganate dosing position on the performance of coagulation/ultrafiltration combined process[J]. Chin.J.Chem.Eng., 2018, 26(1): 89-95. DOI： 10.1016/j.cjche.2017.03.037.

摘要

Abstract

The effects of potassium permanganate (KMnO

) dosing position on the natural organic matter (NOM) removal as well as membrane fouling were investigated in the coagulation/ultrafiltration combined process. KMnO

oxidation altered the NOM characteristics in terms of hydrophobicity and molecular weight

and destroyed humic substances originated from terraneous organisms in raw water. The optimal KMnO

dosage was 0.5 mg·L

-1

in the peroxidation enhanced coagulation process with respect to the dissolved organic carbon (DOC) removal. When KMnO

was dosed into both upstream and downstream of coagulation

namely in the proposed twoposition dosing mode

coagulation and KMnO

oxidation worked individually on the apparent DOC removal. However

compared to the KMnO

addition prior to or after coagulation

the two-position dosing mode dramatically alleviated membrane fouling and reduced fouling irreversibility. This was attributed to the change of NOM characteristics as a result of KMnO

addition prior to coagulation and the presence of MnO

on membrane surface as a result of KMnO

addition prior to ultrafiltration. This work may provide useful information for the application of KMnO

oxidation in the coagulation/ultrafiltration combined system.

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