Ultraviolet (UV) disinfection systems used for reclaimed water applications are typically designed and operated in accordance to the National Water Research Institute (NWRI) Guidelines. The Guidelines specify that UV systems must deliver a validated UV dose of 100 mJ/cm2 with mediafiltered effluents, 80 mJ/cm2 with membrane filtered effluents, and 50 mJ/cm2 with reverse osmosis (RO) effluents. The guidelines also state that UV systems used after media filtration must also deliver a UV dose sufficient to meet coliform requirements. The NWRI Guidelines focus on non-potable reclaimed water applications of UV disinfection, and guidelines for potable reclaimed water applications have not yet been developed. It is expected that UV systems will be used to achieve 6-log pathogen reduction.
The project will benchmark the performance of UV systems used in reclaimed water applications, develop recommendations for UV implementation for non- and direct potable reuse, and develop troubleshooting tools that utilities can use to quantify and optimize UV system operation.
Originally funded as WERF project Reuse-14-11.