AWWA WQTC65926

The objective of this study was to assess the feasibility of using tubular,ceramic and hollow fiber microfiltration/ultrafiltration (MF/UF) membrane processes with larger pores at very high hydraulicloading rates (flux) for treatment of spent filter backwash (SFBW). It is expected that these processes will also provideexcellent treated water quality with turbidity (solids level) likely to be lower than that resultingfrom processes such as conventional settling, high rate sedimentation or dissolved air flotation. The overall approach was to utilize both simulated and actual SFBW in bench-scale tests ofmembrane model performance. Descriptions of the SFBW, the bench-scale apparatus, themembrane modules and membrane operational procedures follow. It is very important to notethat experiments were conducted with very small scale membrane modules in a constant TMP,varying flux approach, and at quite high absolute flux. These conditions would not likely beemployed at pilot or full-scale with commercially available membrane elements; a constant flux,variable TMP approach with larger membrane modules would be used. Such testing needs to beconducted in another phase of work beyond this preliminary, investigation of concept, researchphase. Includes 8 references, tables, figures.

Product Details

Edition:

Vol. - No.

Published:

11/01/2007

Number of Pages:

10

File Size:

1 file , 120 KB