Combined effects of Cu2+ and Zn2+ on activated sludge process

被引:45
作者
Beyenal, NY [1 ]
Ozbelge, TA [1 ]
Ozbelge, HO [1 ]
机构
[1] MIDDLE E TECH UNIV,DEPT CHEM ENGN,TR-06531 ANKARA,TURKEY
关键词
activated sludge process; HMs; toxicity; biokinetics; inhibition; zinc; copper; WW;
D O I
10.1016/S0043-1354(96)00300-4
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The aim of this study is to investigate the combined effects of Cu2+ and Zn2+ in a synthetic wastewater (WW) on activated sludge process (ASP) over a wide range of mean cell residence times. Experiments were performed in two phases: (i) experiments without heavy metals (HMs), (ii) experiments with HMs using acclimated microorganisms (MOs). In the first phase, biokinetic constants of the synthetic WW inoculated with seed MOs were determined and a linear relationship between substrate removal efficiency and mean cell residence time was found. In the second phase, experiments were conducted with acclimated MOs for processing a WW containing 1.5 mg Cu2+/L and 9 mg Zn2+/L. A variable relationship between substrate removal efficiency and mean cell residence time was obtained. The net result of the presence of Cu2+ and Zn2+ in a synthetic WW was found to be toxic to the MOs in ASP. (C) 1997 Elsevier Science Ltd.
引用
收藏
页码:699 / 704
页数:6
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