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Foam_Filtration_Summer_2014.pdfFoam Filtration

Numerous techniques of water filtration are in use today, most of which involve the use of sand as the porous media. A preliminary  literature review revealed a dearth of information on foam filtration. Our team has decided to focus on investigating the actual filtering capacity of a polyurethane foam material as opposed to the traditional method of sand filtration. With proper implementation, a foam filter could reduce the amount of water that is wasted during the backwash cycle of a traditional sand filter. A foam filter requires less surface area, and could potentially be less expensive to build than a traditional sand filter. However, a foam filtration unit will also require a tight seal with all of the edges of the tank, in order to avoid preferential flow paths which will result in unfiltered water. In addition, a foam filter will likely require manual maintenance by the plant operator.

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*PPI stands for pores per inch, which is a linear measurement of foam pore size. A larger pore size number (i.e.60 ppi) corresponds to a smaller pore size. Column Team Members Abigail Brown Ethan Keller Ji Young Kim Michael Erickson Column Documents   Challenges Tasks Symposium Final Presentation Final Report Additional Materials Summer '14         Spring '14     Fall '13     Spring '13   Fall '12   Summer '12   Spring '12   Fall '11   Spring '11   Column Past Research Spring 2011 Fall 2010 Summer 2010 Spring 2010 Reflection Reports General Filtration Page