AWWA ACE70742

This powerpoint presentation begins by providing the problem statement and research objectives that include: assess utility of fouling indicesdetermined using bench-scale testingconditions that are typical of fullscaleoperation; and, use this bench-scale approach tostudy the role of organic nitrogen inmembrane fouling. The testing protocol is presented, along with some low pressure hollow fiber (LPHF) fouling descriptions, a schematic illustration of LP membrane fouling, membrane performance forflux and fouling, normalized specific flux, the Total Fouling Index (TFI), Hydraulically Irreversible andChemical Fouling Index (HICFI), and Chemically Irreversible Fouling Index(CIFI). Tests with natural waters are presented and include: Utility A - plant and bench-scale: same membranematerial and operation conditions; membrane feedwater - coagulated; Utility B - raw and coagulated waters; and, Blackstone River water - a wastewater impaired raw water source. Conclusions indicate the following: resistance in series approach can beused to determine fouling indices forLPHF treatment of natural waters; most fouling for natural waters ishydraulically and chemically reversed; and, water sources that cause higher totalfouling also cause higher hydraulic andchemical fouling, i.e., a short filtrationexperiment could be used to predictmembrane fouling. Includes tables, figures.

Product Details

Edition:

Vol. - No.

Published:

11/01/2009

Number of Pages:

32

File Size:

1 file , 1.2 MB