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Focused Flow Propeller Technology Maximizes Output and Minimizes Power and Production Costs in Anaerobic Digesters

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Abstract:

A patent-pending family of propellers (a.k.a. focused flow propellers (FFP)) has been devised to replace the less efficient combination of pump-propellers situated inside draft-tubes for anaerobic digesters. It will be shown that a new focused flow propeller, operating near the top liquid level surface and without the aid of a draft tube, will induce velocities at the tank floor sufficient for the suspension and mixing of the biomass needed to promote the efficient digestion of waste. These goals are achieved through the use of the patent-pending propeller technology called “circular rake” (CR) which has been proven via CFD comparisons, particle image velocimetry (PIV) measurements of scale models, and the successful field implementation of focused flow propellers used in the geometrically similar petroleum storage tank cleaning application.
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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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