AWWA ACE58286

Against the backdrop of recent E-coli and Cryptosporidium outbreaks in Canada, the community ofCanyon Creek (population 800) elected to adopt a comprehensive treatment upgrade strategy. As a firststep towards addressing more stringent water quality requirements, pilot testing of membrane filtrationand ultraviolet (UV) disinfection technologies was undertaken. "Three" different types of membrane units were pilottested as means to proof test their performance and applicability for the high TOC (14 mg/l) and algae-ladenraw water source. Testing included assessment of powdered activated carbon (PAC), granular activated carbon (GAC) and enhanced coagulationtechniques to maximize organics removal. In addition to the pilot testing work undertaken, anotherunique aspect of this project was the decision to integrate the old package plant unit as part of the newtreatment scheme. The design allows the existing package plant to be used as a pretreatment stepupstream of the membrane system. This has the technical benefit of minimizing the loading on themembranes and in so doing maximizing their lifespan. From a financial perspective, it has the benefit ofmaximizing the use of existing infrastructure while reducing overall construction costs.This paper provides an overview of the project drivers, the comprehensive pilot testing work undertaken, theunique design features of this integrated system (conventional treatment & membrane) and the challengesposed by winter construction and cold weather operation. Includes figures.

Product Details

Edition:

Vol. - No.

Published:

06/15/2003

Number of Pages:

9

File Size:

1 file , 2.2 MB