This powerpoint presentation begins by providing a brief overview of the Orange County Water District and the GWR System Advanced
Water Purification. Project objectives were to:
examine microfiltration (MF) fouling of polypropylene membrane
material under controlled conditions;
characterize materials and conditions responsible
for MF fouling;
prevent the foulants from entering the membrane
matrix; and,
improve permeate flux, extend membrane life and
decrease operating costs. Foulant characterization (microparticles vs. nanoparticles) is presented, along with feedwater chemistry matrix effects, and a MF coagulant pilot study. Presentation conclusions indicate the following:
microparticulate cake formation is not the
primary mechanism responsible for MF flux
reduction;
nanoparticles < 200 nm but > 2.5 nm (10K
Daltons) can coat and enter the membrane matrix
and cause pore plugging;
changes in feedwater chemistry can influence
nanoparticulate fouling; and,
chemically aggregating nanoparticulates (< 200
nm) into microparticulates (> 200 nm) lowers TMP
and slows down accumulation of material in the
membrane matrix and may improve membrane
performance. Includes figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 1.8 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 33 |
| Published : | 11/01/2009 |
