Coagulation performance and membrane fouling of polyferric chloride/epichlorohydrin-dimethylamine in coagulation/ultrafiltration combined process

被引：12
|
作者：
Sun, Shenglei [1 ]
Yang, Zhonglian [1 ]
Huang, Xin [1 ]
Bu, Fan [1 ]
Ma, Defang [1 ]
Dong, Hongyu [1 ]
Gao, Baoyu [1 ]
Yue, Qinyan [1 ]
Wang, Yan [1 ]
Li, Qian [1 ]
机构：
[1] Shandong Univ, Sch Environm Sci & Engn, Key Lab Water Pollut Control & Resource Reuse, Jinan 250100, Peoples R China
来源：
DESALINATION | 2015年 / 357卷
基金：
中国国家自然科学基金;
关键词：
PFC/DAM-ECH; Coagulation; Floc properties; Membrane fouling; ORGANIC-MATTER NOM; SURFACE-WATER; CHLORIDE; BREAKAGE; PRESSURE; FLOCS; PH; ULTRAFILTRATION; FLOCCULATION; FILTRATION;
D O I：
10.1016/j.desal.2014.11.031
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Polyferric chloride (PFC) and epichlorohydrin-dimethylamine (DAM-ECH) with different PFC (as Fe3+)/DAM-ECH mass ratios (MR) and dose methods were used in the treatment of humic acid-kaolin (HA-kaolin) simulated water under different pH conditions. Coagulation performance, floc characteristics and membrane fouling of PFC/DAM-ECH in coagulation-ultrafiltration (C-UF) process were investigated in this study. Results showed that the optimum coagulation performance was achieved when PFC dose was 15 mg/L with PFC/DAM-ECH MR of 2:1 under pH 6.0. Opposite adding sequence (DAM-ECH/PFC) would reduce UV254 (ultraviolet adsorption at 254 nm) and DOC (dissolved organic carbon) removal efficiency. Addition of DAM-ECH on the basis of PFC produced larger and stronger flocs with better regrowth ability. Proper dosage of DAM-ECH under certain coagulation condition could achieve the best coagulation performance and keep the UF membrane operating under a preferable status. Results of this study would be beneficial for application of composite coagulant PFC-DAM-ECH and DAM-ECH as coagulant aid in water treatment processes. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：163 / 170
页数：8
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