文献类型：期刊文献

英文题名：Removal and transformation of effluent organic matter (EfOM) in biotreated textile wastewater by GAC/O₃ pre-oxidation and enhanced coagulation

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

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

年份：2013

卷号：34

期号：12

起止页码：1513

外文期刊名：ENVIRONMENTAL TECHNOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000321987600003)】；

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：biotreated textile wastewater; effluent organic matter; ozone; granular activated carbon; enhanced coagulation

摘要：GAC/O-3 (ozonation in the presence of granular activated carbon) combined with enhanced coagulation was employed to process biotreated textile wastewater for possible reuse. The doses of ozone, GAC and coagulant were the variables studied for optimization. The effects of different treatment processes on effluent organic matter (EfOM) characteristics, including biodegradability, hydrophobic and hydrophilic nature, and apparent molecular weight (AMW) distribution were also investigated. Compared with ozonation, GAC/O-3 not only presented a higher pre-oxidation efficiency, but also improved the treatability of hydrophobic and high molecular weight compounds by enhanced coagulation. After treatment by GAC/O-3 pre-oxidation (0.6 mg O-3 center dot mg(-1) COD and 20 g center dot L-1 GAC) and enhanced coagulation (25 mg center dot L-1 Al3+ at pH 5.5), the removal efficiencies of chemical oxygen demand (COD), dissolved organic carbon (DOC) and colour were higher than those for coagulation alone by 17.3%, 12.0% and 25.6%, respectively. Residual organic matter consisted mainly of hydrophobic acids and hydrophilic compounds of AMW<1kDa, which were colourless and of limited biological availability. The combination of GAC/O-3 and enhanced coagulation was proved to be a simple and effective treatment strategy for removing EfOM from biotreated textile wastewater.