Combined effects of Ni(II) and Cr(VI) on activated sludge

Date

1998-02-01

Author

Dilek, Filiz Bengü
Yetiş, Ülkü

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The combined effects of Ni(II) and Cr(VI) on activated sludge kinetics were studied in this paper. The metals were added to a synthetic medium with a chemical oxygen demand (GOD) of 1300 mgl(-1) to give various combinations of Ni(II) and Cr(VI). Activated sludge performance, in terms of COD removal, was not adversely affected in an acclimatized culture by the metal combinations, compared with the single metals. The combination effects of Ni!II) and Cr(VI)on biokinetic constants, i.e. the maximum specific growth rate, mu(m), was found to be stimulatory in general. The same effect was observed on the half-saturation substrate concentration, K-s. Effects were therefore classified as synergistic with respect to these constants.

Subject Keywords

Nickel, Chromium, Stimulation, Combined effects, Activated sludge, Biokinetics

URI

https://hdl.handle.net/11511/41595

Journal

Water Research

DOI

https://doi.org/10.1016/s0043-1354(97)00225-x

Collections

Department of Environmental Engineering, Article

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Citation Formats

F. B. Dilek and Ü. Yetiş, “Combined effects of Ni(II) and Cr(VI) on activated sludge,” Water Research, pp. 303–312, 1998, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/41595.