Water Supply Vol 2 No 5-6 pp 307–311 © IWA Publishing 2002
Monitoring and maintaining the integrity of immersed ultrafiltration membranes used for pathogen protection
P. Côté*, J. Cadera**, N. Adams*** and G. Best****
*ZENON Environmental Inc., 3239 Dundas Street West, Oakville, Ontario, Canada L6M 4B2 (E-mail: pcote@zenonenv.com)
**ZENON Environmental Inc., 3239 Dundas Street West, Oakville, Ontario, Canada L6M 4B2
***ZENON Environmental Inc., 3239 Dundas Street West, Oakville, Ontario, Canada L6M 4B2
****ZENON Environmental Inc., 3239 Dundas Street West, Oakville, Ontario, Canada L6M 4B2
ABSTRACT
Membrane filtration has become the preferred alternative to conventional technology to remove water-borne pathogens in the preparation of drinking water. This paper presents the integrity monitoring and maintenance options for the ZeeWeed® immersed membrane. Results from two versions of air-based tests, a pressure decay test and a vacuum decay test are presented and shown to be conservative when compared to challenge results from independent studies.
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