AWWA MTC64498

This paper compares the regulatoryphilosophy underlying the more rigorous Long Term 2 Enhanced Surface Water Treatment Rule (LT2ESWTR) requirements with not only the regulationsgoverning conventional filtration under other U.S. Environmental Protection Agency (USEPA) water treatment rules promulgated in thepast 20 years, but also to previous USEPA guidance dealing with alternate filtration technologiesunder the 1989 Surface Water Treatment Rule (SWTR), the rubric under which membranefiltration has been regulated in the absence of technology-specific requirements that may beestablished by state primacy agencies. In addition, the most common arguments both for andagainst holding membrane filtration to a more rigorous regulatory standard than media filtration(as a component of conventional treatment) are presented.Note that for the purposes of this paper, membrane filtration refers to microfiltration (MF) andultrafiltration (UF) technologies. Although the LT2ESWTR and associated Membrane Filtration Guidance Manual (MFGM) includenanofiltration (NF) and reverse osmosis (RO) under the definition of membrane filtration astechnologies that are capable of removing pathogens in compliance with the rule, unlike MF/UF.These desalination processes are not designed for solids removal. Therefore, this discussion islimited to the use of MF and UF, which are generally utilized in applications analogous to thosefor which media filtration is employed. Includes 6 references, tables.

Product Details

Edition:

Vol. - No.

Published:

03/01/2007

Number of Pages:

22

File Size:

1 file , 420 KB