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/O 3 pre-oxidation and enhanced coagulation

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

机构：[1] School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China

年份：2013

卷号：34

期号：12

起止页码：1513

外文期刊名：Environmental Technology (United Kingdom)

收录：EI(收录号：20203209031132)

语种：英文

外文关键词：Biodegradation - Biogeochemistry - Biological materials - Chemical oxygen demand - Coagulation - Effluent treatment - Effluents - Granular materials - Hydrophilicity - Hydrophobicity - Molecular weight - Organic compounds - Oxidation - Ozone - Ozone water treatment - Ozonization - Textiles - Wastewater reclamation

摘要：GAC/O3 (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/O3 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/O3 pre-oxidation (0.6 mg O3·mg-1 COD and 20 g·L-1 GAC) and enhanced coagulation (25 mg·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