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POE Purifier for the Home with High Efficiency UV and Metal Removal

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Abstract:

A high efficiency UV reactor in combination with high capacity metal removal and organic adsorbents for point-of-entry home water purification is described. The purifier provides water exceeding EPA standards across a wide range of incoming water conditions; test data show 6 log pathogen reduction by the UV module in combination with reduction of heavy metal to sub-EPA standards.

Thin film annular reactors comprising two concentric cylinders provide large surface-to-volume ratio, increasing the UV dosage and reducing the radiation path length. To optimize pathogen reduction between concentric cylinders, the inactivation in laminar Poiseuille flow, turbulent flow and laminar Taylor-Couette flow was investigated experimentally and numerically; improved designs for Taylor-Couette based reactors are discussed.

New high capacity metal removal adsorbents employing cross-linked chitosan are discussed. It is projected that metal and organic removal upstream of a UV reactor improve UV efficiency, enabling a low cost system for the home; comparison to a conventional UV system is presented.

Keywords: Taylor-Couette; UV; chitosan; metal removal; water purifier

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864709793847609

Publication date: January 1, 2009

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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 These proceedings are not peer reviewed.

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