AWWA MTC61131

The City of North Bay in Ontario, Canada has embarked on a long-term plan to upgrade its level oftreatment to include filtration and to comply with new regulations recently promulgated under the OntarioSafe Drinking Water Act (OSDWA).A high recovery membrane/ultrafiltration (UV) system will convert more than 99% of the plant's feed water into drinkingwater. The treatment process will be incorporated into a facility design that incorporates lowenvironmental impact, energy conservation and green-building design concepts (LEED). This projectrepresents the largest pressurized membrane microfiltration (MF) installation for drinking water treatmentin Canada with a summer capacity over 79 ML/d (20-MGD).A Membrane Integrity Verification and Management Program (MIVMAP) is currently underdevelopment for this facility, and will serve to monitor and manage the integrity of the membrane system.This paper addresses the two issues listed below that are related to the implementation of the MIVMAP inthis facility. The first issue addressesthe development of this program which extends the LRV framework developed under theLT2ESWTR and applies it to control Cryptosporidium and Giardia for compliance with otherregulations, aid in plant design, and aid in operation and maintenance (O&M) strategies. Thevalue of this approach is that design and O&M decisions are made in terms of a regulatorycompliance viewpoint, in particularly for specific performance indicators (e.g., LRV). The second issue states thatin order to maximize the benefits of having a robust treatment process (membranes), it is necessary fordesigners to maintain an adequate balance between high performance (LRV), regulatory compliance(credits) and maintenance requirements (integrity failures). Design decisions and product-specificcharacteristics can affect this balance, and therefore must be carefully considered in the early stagesof the project. The unique procurement, design, and product-specific challenges of implementing thisframework for an integrated two-stage membrane/UV treatment process is discussed in this paper. Includes tables, figures.

Product Details

Edition:

Vol. - No.

Published:

03/01/2005

Number of Pages:

12

File Size:

1 file , 530 KB