AWWA ACE65128

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.

Product Details

Edition:

Vol. - No.

Published:

06/01/2007

Number of Pages:

29

File Size:

1 file , 2.8 MB