More stringent water quality standards, growing populations, space restrictions, and increasing
pressure for environmental stewardship are some of the issues faced by municipal water
treatment plants today. New and existing technologies are now being combined to provide
environmentally friendly, cost-effective solutions to these problems. High-rate clarification
systems and deep bed filters are capable of providing greater quantities of equivalent or better
quality water than conventional systems without increasing the environmental footprint of a
water treatment plant (WTP). UV disinfection technology provides a more ecologically aware
disinfection option, with no harmful byproducts produced and no significant impact on the
environment.
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 little
opportunity for expansion; and, a desire to operate more efficiently while being more
environmentally 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 and
meet the new drinking water quality standards without increasing the footprint or environmental
impact of WTP2.
The project was completed in two phases: the first phase retrofitted one of the plant's
conventional clarifiers with two Actiflo® pretreatment units; the second phase converted the
original filters to deep bed filters and retrofitted the remaining conventional clarifier with three
UV reactors and two new deep bed filters. During construction, WTP2 had to remain in
operation, creating unique challenges for the design and construction. The Actiflo® retrofit was
completed in May 2004, and has been successfully operating since that time. The UV addition
and filter conversion/addition were completed in February 2006.
The paper discusses the various issues, including environmental considerations that were
addressed in this marrying of new and existing technologies to meet future goals. Includes tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 3.6 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 38 |
| Published : | 06/01/2007 |
