In literature, natual organic matter (NOM) fouling of ultrafiltration (UF) membranes is described due to the deposition of mostly high
molecular weight organics, bigger than the MWCO-value of the membrane, like polysaccharides. A
former PWN study indicated that the low molecular weight organics and metal complexes rather than
the high molecular weight organics were responsible for the acceleration in film formation of these
HMW fractions and, therefore, fouling. In this study bench-scale experiments were carried out to
reduce the fouling potential of IJssel Lake water by:
removing HMW organics like polysaccharides, with enhanced coagulation, according to
literature;
removing LMW organics like acids and humics, with ion exchange, according to hypothesis
PWN; and,
reducing the negative surface charge of the membrane or using opposite charge to promote
electrostatic exclusion.
The study concluded that the removal of LMW organics (lower then the MWCO-value of
the membrane) with the same amount of HMW organics leads to a much lower fouling potential than
the removal of HMW organics alone. The combination of a relatively high positively charged
hydrophilic membrane and the removal of LMW fractions with an anion resin (MIEX) results to a
high gross flux rate at almost no fouling. However, results have been achieved during a relatively short
time on bench-scale. Extended pilot research is recommended.
Includes 13 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 660 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 11 |
| Published : | 03/01/2005 |
