AWWA WQTC69437

Ultraviolet (UV) D.O.S.E. is a recently developed computer program used for evaluation of UV system designs and simulation of daily UV reactor operation. The program uses project-specific design data and reactor-specific validated performance models to determine the validated UV dose and to confirm the systems ability to deliver the required dose for the specified design conditions, as well as calculates UV reactor head loss and power consumption at the design conditions for comparison with the design requirements and guarantees submitted by UV manufacturers. It also determines if the proposed design represents a validated UV system by comparing the UV reactor's operational variables (typically flow rate, UVT, intensity and RED) with the validation envelope of the UV system, and provides an operational simulation of the UV system allowing estimation of consumables replacements, maintenance requirements, and power consumption. The program allows for the selection of several trending options to account for annual variations in flow rate and UVT, which results in a more realistic simulation of operations as compared with projected estimates based on average or design values. Various operational strategies for the UV system can be selected and/or varied to assist in the evaluation of improved control philosophies in order to complement site specific schedules/requirements as well as assist with power savings. Includes reference, figures.