Comparison of natural estrogen removal efficiency in the conventional activated sludge process and the oxidation ditch process

被引：85
作者：
Hashimoto, T.
Onda, K.
Nakamura, Y.
Tada, K.
Miya, A.
Murakami, T.
机构：
[1] Japan Sewage Works Agcy, Shinjyuku Ku, Tokyo 1600004, Japan
[2] Ebara Corp, Minato Ku, Tokyo 1088480, Japan
[3] Ebara Res Co Ltd, Kanagawa 2518502, Japan
来源：
WATER RESEARCH | 2007年 / 41卷 / 10期
关键词：
wastewater treatment; 17 beta-estradiol (E2); estrone (E1); estrogenic activity; conventional activated sludge process; oxidation ditch process; solids retention time (SRT);
D O I：
10.1016/j.watres.2007.02.029
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The presence of natural estrogens, 17 beta-estradiol (E2), estrone (EI) and estriol (M), as well as estrogenic activity in wastewater influents and secondary effluents were investigated in 20 full-scale wastewater treatment plants in Japan. In all of the influent samples, natural estrogens were detected at concentrations above the minimum limits of detection (0.5 ng/L). The concentrations of natural estrogens detected in the effluent of oxidation ditch plants were generally lower than previously reported values. On the other hand, in the conventional activated sludge plants, increments of El during biological treatment were frequently observed although E2 and E3 were removed effectively in the process. The removal rates of natural estrogens or estrogenic activity show no observed statistical relationship with the solids retention time (SRT) and the hydraulic retention time (HRT). However, the plants with high SRT or HRT generally showed high and stable removal of both natural estrogens and estrogenic activity. (C) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2117 / 2126
页数：10
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