Impacts of epichlorohydrin-dimethylamine on coagulation performance and membrane fouling in coagulation/ultrafiltration combined process with different Al-based coagulants

被引：14

作者：

Bu, Fan ^{[1
]}

Gao, Baoyu ^{[1
]}

Li, Ruihua ^{[1
]}

Sun, Shenglei ^{[1
]}

Yue, Qinyan ^{[1
]}

机构：

[1] Shandong Univ, Shandong Key Lab Water Pollut Control & Resource, Sch Environm Sci & Engn, 27 Shanda South Rd, Jinan 250100, Shandong, Peoples R China

来源：

CHEMOSPHERE | 2016年 / 159卷

关键词：

Aluminum-based coagulant; DAM-ECH aid; Coagulation; Floc properties; Membrane fouling; DISINFECTION BY-PRODUCTS; AQUATIC HUMIC SUBSTANCES; NATURAL ORGANIC-MATTER; FLOC PROPERTIES; DRINKING-WATER; COMPOUND BIOFLOCCULANT; POLYALUMINUM CHLORIDE; HYBRID PROCESS; ACID; FLOCCULATION;

D O I：

10.1016/j.chemosphere.2016.06.001

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Two kinds of aluminum-based coagulants and epichlorohydrin-dimethylamine (DAM-ECH) were used in the treatment of humic acid-kaolin simulated water by coagulation-ultrafiltration (C-UF) hybrid process. Coagulation performance, floc characteristics, including floc size, compact degree, and strength were investigated in this study. Ultrafiltration experiments were conducted by a dead-end batch unit to implement the resistance analyses to explore the membrane fouling mechanisms. Results showed that DAM-ECH aid significantly increased the UV254 and DOC removal efficiencies and contributed to the formation of larger and stronger flocs with a looser structure. Aluminum chloride (Al) gave rise to better coagulation performance with DAM-ECH compared with poly aluminum chloride (PACT). The consequences of ultrafiltration experiments showed that DAM-ECH aid could reduce the membrane fouling mainly by decreasing the cake layer resistance. The flux reductions for PACT, Al/DAM-ECH (dosing both AI and DAM-ECH) and PACl/DAM-ECH (dosing both PACT and DAM-ECH) were 62%, 56% and 44%, respectively. Results of this study would be beneficial for the application of PACl/DAM ECH and Al/DAM ECH composite coagulants in water treatment processes. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：228 / 234

页数：7

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