Localized DBP Treatment Evaluation Model And User’s Manual

Project Paper
p>Supporting materials for Foundation report, Localized Treatment for Disinfection By-Products (project #3103 /order #91254).
p>This Excel-based model estimates the cost of localized treatment and TTHM and HAA5 levels in the distribution system after treatment. It is intended to be used to give utilities an indication of whether or not localized DBP treatment is cost-effective for their particular situation. Required input information includes (1) temperature, pH, bromide concentration, free chlorine concentration, TOC concentration, TTHM concentration, HAA5 concentration in the influent water; (2) total flow going into the portion of the distribution system of concern and the portion of that flow to be treated; (3) expected maximum residence time after treatment and rechlorination; and (4) rate constant adjustment factors determined from laboratory and field testing. Output of the model includes water quality of the treated effluent at different blending rates after treatment and following the maximum residence time thereafter, as well as the capital and O&M costs.
p>Details of the localized treatment process can be found in the report for project 3103.
p>The user's manual documents the development of each calculation module in the model and describes the required input information, output information, and each calculation module. The model is developed under the auspices of the Water Research Foundation, Las Vegas Valley Water District, South Central Connecticut Region Water Authority, and the City of Phoenix Water Service Department.