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

Date

1997-04-01

Author

Beyenal, NY
Ozbelge, TA
Özbelge, Hilmi Önder

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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.

Subject Keywords

Activated sludge process, WW, Copper, Zinc, Inhibition, Biokinetics, Toxicity, HMs

URI

https://hdl.handle.net/11511/56813

Journal

WATER RESEARCH

DOI

https://doi.org/10.1016/s0043-1354(96)00300-4

Collections

Graduate School of Natural and Applied Sciences, Article

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Citation Formats

N. Beyenal, T. Ozbelge, and H. Ö. Özbelge, “Combined effects of Cu2+ and Zn2+ on activated sludge process,” WATER RESEARCH, pp. 699–704, 1997, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/56813.