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The effects of nickel on the completely mixed activated sludge process
The purpose of this investigation was to conduct batch and continuous
flow laboratory experiments with bench scale activated sludge
units to determine the effects of nickel on the completely mixed activated
sludge process. The model units were located in a constant temperature
room maintained at 20Â±2Â°C. The batch reactors were operated
under acclimated and shock loaded condition with various nickel concentration
to determine its effects on the rate of COD removal. The continuous
flow units were operated until steady state conditions were
obtained at each mean cell residence time studied and then data were
recorded for an approximate 7 days period and averaged to obtain one
steady state data point. Nickel was added to the waste water at various
concentration to determine its effects on COD removal efficiency, degree
of nitrification and on the biokinetic constants Ymax and kd.