AWWA ACE65435

More stringent water quality standards, growing populations, space restrictions, and increasingpressure for environmental stewardship are some of the issues faced by municipal watertreatment plants today. New and existing technologies are now being combined to provideenvironmentally friendly, cost-effective solutions to these problems. High-rate clarificationsystems and deep bed filters are capable of providing greater quantities of equivalent or betterquality water than conventional systems without increasing the environmental footprint of awater treatment plant (WTP). UV disinfection technology provides a more ecologically awaredisinfection option, with no harmful byproducts produced and no significant impact on theenvironment.The City of Red Deer in central Alberta, Canada, was faced with all these challenges: burgeoning growth; tighter provincial drinking water regulations; a plant site that offered littleopportunity for expansion; and, a desire to operate more efficiently while being moreenvironmentally conscientious. This paper describes the innovative design and retrofit of Actiflo®pretreatment, deep bed filtration and UV disinfection into the City's water treatment plant(WTP2). The goal of this project was to double the treatment capacity, improve disinfection andmeet the new drinking water quality standards without increasing the footprint or environmentalimpact of WTP2.The project was completed in two phases: the first phase retrofitted one of the plant'sconventional clarifiers with two Actiflo® pretreatment units; the second phase converted theoriginal filters to deep bed filters and retrofitted the remaining conventional clarifier with threeUV reactors and two new deep bed filters. During construction, WTP2 had to remain inoperation, creating unique challenges for the design and construction. The Actiflo® retrofit wascompleted in May 2004, and has been successfully operating since that time. The UV additionand filter conversion/addition were completed in February 2006.The paper discusses the various issues, including environmental considerations that wereaddressed in this marrying of new and existing technologies to meet future goals. Includes tables, figures.

Product Details

Edition:

Vol. - No.

Published:

06/01/2007

Number of Pages:

38

File Size:

1 file , 3.6 MB