Single and Combined Effects of Copper and Nickel on Nitrification Organisms in Batch Units

Nickel and copper are widely encountered in the industrial wastewaters. The purpose of this batch experimental study was to evaluate single and combined effects of copper and nickel on the nitrification organism activities. Trace amounts of Cu2+stimulate the activity of nitrifiers and ARRs increased...

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Bibliographic Details
Published in:Journal EJSDR- European Journal of Sustainable Development and Research 2017-01, Vol.2 (1), p.51
Main Author: Aslan, Sukru
Format: Article
Language:English
Subjects:
Copper
Nickel
Organisms
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Summary:Nickel and copper are widely encountered in the industrial wastewaters. The purpose of this batch experimental study was to evaluate single and combined effects of copper and nickel on the nitrification organism activities. Trace amounts of Cu2+stimulate the activity of nitrifiers and ARRs increased from 0.225 to about 0.5 mg NH4-N/mg MLSS.day on the first day by elevating Cu2+concentrations from zero to 0.05 mg/L respectively. Nitrification inhibition was not observed during the experimental studies for the studied Cu2+concentrations. The ARRs of the nitrification organisms were also found to have decreased by about 16 to 21 fold upon addition of Ni2+. Additions of Ni2+ negatively affect the ammonium oxidation and reaction was not detected during the operations of third day. The ARR values for the studied initial Ni2+concentrations were lower than the blank sample. The simultaneous presences of Ni2+-Cu2+ negatively affect the activity of nitrification organisms. In order to achieve the same ammonium oxidation level as compared with the blank sample it needs more reaction times. The experimental results indicated that it is possible to treat industrial wastewater Ni2+ and Cu2+ with individually or together. The toxicity of heavy metal could be minimized by increasing the microorganisms in the biological reactor.
ISSN:2458-8091