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Settling velocity

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Full-Text Articles in Biomedical Engineering and Bioengineering

Evaluation Of The Performance Of A Downward Flow Inclined Gravity Settler For Algae Dewatering, Dustin D. Bowden Jan 2015

Evaluation Of The Performance Of A Downward Flow Inclined Gravity Settler For Algae Dewatering, Dustin D. Bowden

ETD Archive

With recent concerns over the environmental implications of burning fossil fuels coupled with the depletion of fossil fuel reserves an alternative source of energy isneeded. Algae derived biofuels may be an effective replacement for transportation fuels as they are carbon neutral and have a high area productivity. Algae is superior to terrestrial plants as a biofuel source due to its high oil productivity and efficiency along with the fact that it will not displace food production. Currently the largest obstacle to the implementation of commercial algae to biofuel processes is algae dewatering. The separation of algae from water is difficult ...


Two Approaches For Cell Retention In Perfusion Culture Systems, Zhaowei Wang Jan 2009

Two Approaches For Cell Retention In Perfusion Culture Systems, Zhaowei Wang

ETD Archive

A lack of efficient, economical, and reliable cell retention devices has limited the application of perfusion culture systems in the biopharmaceutical industry. Two types of cell retention devices were developed in this work for long-term perfusion culture systems: a modification of an inclined gravity settler and a variation of an ultrasonic filter. Both bench-top and large-scale tests showed that the gravity settler can effectively retain viable cells and preferentially remove nonviable cells in perfusion culture systems. The viable cell retention rate can be maintained well above 90 during long-term perfusion culture period while the nonviable cell retention rate is 20-30 ...