Biologically active ion exchange (BIEX) for NOM removal and membrane fouling prevention

被引:26
作者
Schulz, M. [1 ]
Winter, J. [2 ]
Wray, H. [2 ]
Barbeau, B. [3 ]
Berube, P. [2 ]
机构
[1] Hamburg Univ Technol, Inst Water Resources & Water Supply, Schwarzenberg Campus 3, D-20173 Hamburg, Germany
[2] Univ British Columbia, Dept Civil Engn, 2002-6250 Appl Sci Lane, Vancouver, BC V6T 1Z4, Canada
[3] Ecole Polytech, Dept Civil Min & Geol Engn, CP 6079,Succursale Ctr Ville, Montreal, PQ H3C 3A7, Canada
来源
WATER SCIENCE AND TECHNOLOGY-WATER SUPPLY | 2017年 / 17卷 / 04期
基金
加拿大自然科学与工程研究理事会;
关键词
biological ion exchange; irreversible fouling; membrane fouling; NOM removal; ultrafiltration; NATURAL ORGANIC-MATTER; HUMIC SUBSTANCES; WATER; FILTRATION;
D O I
10.2166/ws.2017.016
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The natural organic matter (NOM) removal efficiency and regeneration behavior of ion-exchange filters with promoted biological activity (BIEX) was compared to operation where biological activity was suppressed (i.e. abiotic conditions). The impact of BIEX pre-treatment on fouling in subsequent ultrafiltration was also investigated. Biological operation enhanced NOM removal by approximately 50% due to an additional degradation of smaller humic substances, building blocks and low molecular weight acids. Promotion of biological activity significantly increased the time to breakthrough of the filters and, therefore, is expected to lower the regeneration frequency as well as the amount of regenerate of which to dispose. Pre-treatment using BIEX filters resulted in a significant decrease in total and irreversible fouling during subsequent ultrafiltration. The decrease was attributed to the effective removal of medium and low molecular weight NOM fractions. The results indicate that BIEX filtration is a robust, affordable and easy-to-operate pre-treatment approach to minimize fouling in ultrafiltration systems and enhance the quality of the produced permeate.
引用
收藏
页码:1178 / 1184
页数:7
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