絮体铝对活性污泥特性及废水中 17-α-乙炔基雌二醇去除的影响。

Effects of floc aluminum on activated sludge characteristics and removal of 17-alpha-ethinylestradiol in wastewater systems.

机构信息

Department of Civil and Environmental Engineering, University of Massachusetts, Amherst, MA 01003, United States.

出版信息

Water Res. 2010 Mar;44(5):1335-40. doi: 10.1016/j.watres.2009.11.002. Epub 2009 Nov 10.

DOI:10.1016/j.watres.2009.11.002

PMID:19944440

Abstract

The effects of floc aluminum (Al) on activated sludge performance and 17-alpha-ethinylestradiol (EE2) removal were studied using bench-scale activated sludge systems. The results showed that higher Al-fed activated sludge led to better settling, dewatering, and effluent quality with better EE2 removal. EE2 concentrations in the effluent revealed correlations with effluent suspended solids and large particulate/colloidal effluent biopolymer (protein+polysaccharide). Furthermore, a significant correlation existed between effluent proteins and EE2 for all size fractions, indicating that hydrophobic proteinaceous colloids provide binding sites for EE2 and washout together into the effluent. These results suggest that aluminum plays a crucial role in bioflocculation of activated sludge and the efficacy of flocculation influences the removal of endocrine disrupting compounds (EDCs) from wastewater treatment systems.

摘要

采用中试规模的活性污泥系统研究了絮状铝（Al）对活性污泥性能和 17-α-乙炔基雌二醇（EE2）去除的影响。结果表明，较高的铝喂养活性污泥导致更好的沉降、脱水和出水质量，具有更好的 EE2 去除效果。出水 EE2 浓度与出水悬浮固体和大颗粒/胶体出水中的生物聚合物（蛋白质+多糖）呈相关性。此外，所有粒径的出水中的蛋白质与 EE2 之间存在显著相关性，表明疏水性蛋白胶体为 EE2 提供了结合位点，并一起冲洗到出水中。这些结果表明，铝在活性污泥的生物絮凝中起着至关重要的作用，絮凝的效果会影响废水处理系统中内分泌干扰化合物（EDCs）的去除。