BACKGROUND Great Lakes Pulp & Fibre, Menominee, Michigan, USA invited World Water Works to demonstrate the ability to reduce operational costs associated with two Poseidon dissolved air flotation systems (DAFs). The mill stipulated that the performance of the DAFs must not be negatively affected by any operational cost reductions. The inefficiency of the existing air dissolving technology presented the area of greatest savings and was the focus of this study. For the testing period, World Water Works provided two Nikuni pumps at no charge to the mill for the testing period.

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