In-line coagulation with low-pressure membrane filtration

被引：189

作者：

Choi, KYJ ^{[1
]}

Dempsey, BA ^{[1
]}

机构：

[1] Penn State Univ, Dept Civil & Environm Engn, University Pk, PA 16802 USA

来源：

WATER RESEARCH | 2004年 / 38卷 / 19期

关键词：

membrane; ultrafiltration; in-line coagulation; NOM; unconventional coagulation conditions; zeta potential;

D O I：

10.1016/j.watres.2004.08.006

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The objectives were to investigate the effects of in-line coagulation on removal of natural organic matter (NOM) and turbidity and on fouling of membranes during ultrafiltration (UF). Coagulants were added prior to UF, without intermediate use of conventional processes for removal of particles. Synthetic and natural raw waters were examined. Charge neutralization, sweep floc, and under-dose conditions (with respect to conventional treatment) were all effective for removal of NOM and turbidity by UF. Most coagulation conditions resulted in decreased resistance to filtration and improved hydraulic removal of filter cake, including conditions that would be ineffective prior to conventional settling and rapid-filtration. Flocs that were produced under charge neutralization conditions and acidic under-dose conditions produced lower hydraulic resistance and were less compressible than for sweep floc conditions. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：4271 / 4281

页数：11

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