12-Month UV Fouling Study on Unfiltered Source Water

摘要

The Portland Water Bureau (PWB) undertook a study in 2009-2010 to investigate fouling tendencies of its unfiltered source water with UV equipment. The 12-month study was conducted with three different UV reactors; two medium pressure reactors and one low-pressure high- output (LPHO) reactor. Results showed that the un-wiped medium-pressure lamp sleeves demonstrated significant amounts of fouling during the fall. During the remainder of the year the un-wiped medium-pressure lamp sleeves showed little or no fouling. The un-wiped LPHO sleeves demonstrated no significant fouling during any month of the year. PWB was able to use the results of this study to aid in the pre-selection process of UV equipment for full-scale design.