文献类型：期刊文献

英文题名：Removal characteristics of organics in bio-treated textile wastewater reclamation by a stepwise coagulation and intermediate GAC/O3 oxidation process

作者：Qian, Feiyue[1];Sun, Xianbo[1];Liu, Yongdi[1]

机构：[1]E China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China

年份：2013

卷号：214

起止页码：112

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20130215899800);WOS:【SCI-EXPANDED(收录号:WOS:000315322700015)】；

基金：This study was funded by National High Technology Research and Development Program (863) of China (Grant NO. 2009AA063904).

语种：英文

外文关键词：Bio-treated textile wastewater; Stepwise coagulation; Ozonation; Granular activated carbon; Organics characterization

摘要：In this study, a novel hybrid process involving stepwise coagulation and intermediate ozonation in the presence of granular activated carbon (GAC/O-3) was employed to remove effluent organic matter (EfOM) from bio-treated textile wastewater. Removal behavior of EfOM in different processes, including biodegradability, hydrophobic and hydrophilic property, and apparent molecular weight (AMW) distribution, were evaluated as well. When the polyaluminum chloride (PACI) dose of 25 mg L-1 as Al was used in both pre-coagulation (pH 8.0) and post one (pH 5.5), and the ozone dose of 3.1 mg 03 mg(-1) COD was applied in GAC/O-3 (GAC 10 g L-1) lasting 5 min, the superior removal efficiencies of water quality parameters like turbidity, color, COD, DOC and UV254 were 95.8%, 97.5%, 88.1%, 68.7% and 90.5%, respectively. Results also showed that GAC/O-3 not only gave the efficient decolorization and DOC removal, but also enhanced the treatability of biodegradable and hydrophilic organics of AWM in 1-10 k Da by post coagulation, likely due to the effective removal of colored and hydrophobic organics in AMW > 1 k Da via pre-coagulation. Therefore, the hybrid process applying appropriate operational parameters was proved to be an attractive strategy in the wastewater reclamation. (C) 2012 Elsevier B.V. All rights reserved.