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Abstract
In this work, a pilot-scale aerated grit chamber model was designed and constructed to replicate the full-scale unit at Gold Bar wastewater treatment plant. The model was built to a 15:1 scale based on Froude number similitude criterion. Tracer studies were conducted on the pilot-scale unit to investigate the flow pattern inside the chamber. The non-ideal flow pattern was best described by nine-tanks in series model. Grit samples were collected around the full-scale grit chamber and analyzed to evaluate the tank's performance and the grit's properties. A pilot-scale mixing tank was specially designed and built to perform baseline study of the effect of using hydraulic jets in grit chamber operation. Planar laser induced fluorescence technique was employed to investigate the flow pattern inside the tank and jet-mixing phenomena. The analyses indicated highest axial dispersion was achieved inside the tank with four jet-injectors.
