This powerpoint presentation begins by presenting study goals that include: gain understanding of natural organic matter (NOM) character in Mississippi
River water and its fate through conventional treatment
processes that serve as pretreatment to ultrafiltration (UF);
assess how NOM is partitioned by UF and how effective
UF fouling management methods are for membrane-retained
NOM; and,
assess conventional treatment processes, as currently
operated and optimzed, to control the cycling up of NOM
fractions contained in UF and GMF backwash wastes if
recycled. The study location and facilities are presented, along with
NOM and methods used in NOM
characterization, and
membrane fouling/fouling management. Conclusions indicate that: by characterizing NOM fractions using advanced techniques, insight can be obtained on NOM behavior
throughout the treatment process; LC-OCD and EEM are effective and complementary
NOM characterization techniques, providing a means
of determining which MW fractions are most important in UF fouling and overall treatment efficiency;
despite differing NOM levels during the three campaigns, removal efficiency of NOM fractions was
comparable; lime softening is a key treatment process for biopolymer
removal prior to the membrane system; hydraulic backwashing with air scour was
effective in removing retained NOM of both a
humic-like and protein-like character; more
BW/AS during high-NOM spring runoff may be
advantageous; backwash waste recycle is not expected to result in significant cycling up of NOM
no additional waste treatment steps appear necessary, however optimization of coagulation
process could improve NOM removal. Includes tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 2.5 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 30 |
| Published : | 11/01/2009 |
