This powerpoint presentation begins by providing a brief overview of waterborne disease, and the risk that viruses present because of their smaller size and increased mobility. The research hypothesis is as follows:
penetration of viruses through ultrafiltration (UF)
membranes cannot be explained by any of
previously proposed mechanisms; and,
changes in virus penetration are dynamic
and related to UF pore size and transmembrane pressure (TMP)
during regular operation. The rejection prediction states that
the UF membrane should pose an
efficient barrier to the penetration of
bacteriophage T4, in contrast to MS2 and
X174 that are 10 times of magnitude
smaller than T4. Study conclusions indicate that: UF membranes do not provide the
absolute barrier for viruses;
penetration mechanism of phages
through nanopores has its origins in
TMP - the pressure causes enlargement of
pores, with time enabling the viruses to
pass through them; and,
complete virus retention cannot be
obtained with UF membrane processes,
and therefore, in water treatment
applications optimal TMPs must be
determined. Includes tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 1.8 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 18 |
| Published : | 11/01/2009 |
