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AWWA ACE65128
- A Serial Filtration Investigation of Membrane Fouling by Natural Organic Matter
- Conference Proceeding by American Water Works Association, 06/01/2007
- Publisher: AWWA
$12.00$24.00
This study looks at whether natural organic matter (NOM) that has permeated through a membrane, foul an identical downstream membrane. The approach involved serial filtration with varying lag times between adjacent membranes. Conclusions were that: fouling proceeds by progressive narrowing of membrane pores at mouth, followed by coverage of the membrane surface by a gel layer;only a few percent of feed NOM is removed by the first membrane; however, the permeate containing the remaining NOM has a much lower tendency to foul downstream membranes; the fouling rate and surface coverage by globules of the downstream membranes increases with increasing storage time; and,NOM globules can form on a membrane by aggregation of small molecules that have passed through an upstream membrane. Includes reference, figures.
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