The primary goal of this AwwaRF funded research was to develop a systematic
performance testing protocol for characterizing MF and UF membranes based on their ability to
reject viral and submicron bacterial pathogens with various water qualities and operating
conditions. Seeding challenges were conducted with the continuous microfiltration (CMF) and
submerged-continuous microfiltration (CMF-S) pilot units at the Atlanta Fulton County Water
Treatment Plant, Georgia (AFCWTP, drinking water facility with raw surface water), and the
Scottsdale Water Campus, Arizona (SWC, water reclamation facility using secondary clarified
effluent). These units were both equipped with 0.1 &181;m PVDF hollow fiber membranes. MS2
and PRD1 phages were used to quantify the viral removal, while Pseudomonas diminuta was
used to characterize the bacterial removal. Results obtained with the pilot units under clean
water conditions (dechlorinated tap water) have shown that Pseudomonas diminuta was
completely removed (~ 5.0 log-units). PRD1 phage removal varied between 0.3-1.8 log and
removal of MS2 phage varied between 0-1.1 log. Short- and long-term fouling experiments with
raw, filtered water and secondary effluent showed that deposition (cake) and pneumatically-irreversible
fouling can induce additional phage removal to a variable extent depending upon the
size of the microorganism, the feed water quality and the decline in specific flux. Microbial
rejection results from both these facilities using waters of varying quality and membrane types
are compared and presented. The increase in removal of PRD1 phage due to membrane fouling
appears to be correlated to the decline in specific flux. Includes 17 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 420 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 21 |
| Published : | 06/17/2004 |
