Layered Aeration Mixes It Up, Vertically

Abstract

This article reports on a situation at United Water New Jersey's (UWNJ) Haworth Water Treatment Plant where water quality in the Oradell Reservoir deteriorated due to runoff from surrounding developed areas and supplemental water being introduced from adjacent watersheds. This resulted in an increased rate of eutrophication of the reservoir water, along with higher turbidity, natural organic matter, and nutrient levels. Characteristics of the Oradell Reservoir are given, along with past treatment practices. Several reservoir management options are listed, and from these options UWNJ decided on a reservoir aeration system that would stabilize raw water quality in the reservoir.