Effects of pre-treatment with magnetic ion exchange resins on coagulation/flocculation process

被引：10
|
作者：
Sani, B. [1 ]
Basile, E. [1 ]
Rossi, L. [2 ]
Lubello, C. [1 ]
机构：
[1] Univ Florence, Dept Civil & Environm Engn, I-350139 Florence, Italy
[2] Publiaqua SpA, I-3950126 Florence, Italy
来源：
WATER SCIENCE AND TECHNOLOGY | 2008年 / 57卷 / 01期
关键词：
coagulant dose; floc characteristics; MIEX (R); PDA2000;
D O I：
10.2166/wst.2008.785
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A new Magnetic Ion Exchange resin for DOC (Dissolved Organic Carbon) removal (MIEX (R) DOC Resin) has been evaluated as water pre-treatment at the Drinking Water Treatment Plant (DWTP) of Florence in order to reduce the oxidant demand and disinfection by-products (DBPs) formation potential. This pre-treatment leads to several effects on downstream treatment processes. in this experimental study the effects of MIEX (R) pre-treatment on clariflocculation process were evaluated with respect to coagulant demand reduction and characteristics of flocs formed. The analysis was conducted using traditional jar test procedures and a Photometric Dispersion Analyser (PDA2000) which provided continuous information about the aggregation state of particles during the jar tests. For a fixed turbidity goal in clarified water, ion exchange pre-treatment led to coagulant dosage reduction up to 60% and PDA results shown that flocs formed in pre-treated water were bigger and more resistant to shearing effects than those formed by conventional clariflocculation.
引用
收藏
页码：57 / 64
页数：8
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