Dissolved Air Flotation (DAF) Pilot Study for Algae and DBP Reduction

Abstract: A pilot study of dissolved air flotation clarification (DAF) with mixed media filtration was conducted at the Norwich Public Utilities Stony Brook water treatment plant for the removal of disinfection byproducts (DBP) and algae in the late summer of 2013.  A variety of coagulants and flow rates were studied. DAF showed outstanding algae removal in excess of 90 percent with all coagulants. DBP removal varied by coagulant with ferric chloride and high doses of alum achieving the best results.

Application of Ozonation and Ultrafiltration in Drinking Water Treatment Operational Comparison

Abstract:
The Spectacle Pond Water Treatment Facility in Littleton, Massachusetts has been successfully operating for over ten years relying on a combination of ozone oxidation followed by ultrafiltration membranes. This paper compares the operation of the plant in Littleton with more recent installations utilizing ozonation and ultrafiltration membranes at the Mattapoisett River Valley Water Treatment Facility in Mattapoisett, Massachusetts and the Baldwin Pond Water Treatment Facility in Wayland, Massachusetts with regard to similarities as well as changes that have affected the industry.

Advanced Condition Assessment for Pipeline Rehabilitation

In 2007, Tata & Howard began extracting one foot long cast iron water main samples ranging in diameter from six to twelve inches as part of a cleaning and cement lining water main rehabilitation project for the South Central Connecticut Regional Water Authority (SCCRWA). Since then, Tata & Howard has evaluated a significant number of cast iron water main samples for several water distribution systems throughout Massachusetts and Connecticut, typically during a pipeline rehabilitation project, water main failure, or water main replacement project.

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