Identification of EfOM and NOM Fractions Responsible for Fouling in UF/MRDempsey, Brian; Kim, Hyunchul; Timmes, Tom Edition: Vol. - No.
American Water Works Association / 01-Nov-2009 / 35 pages

This powerpoint presentation begins by providing a brief overview of wastewater reuse. Fouling in ultrafiltration (UF)/microfiltration (MF) is presented, along with effluent organic matter (EfOM) - removal and fouling;dealing with EfOM - generic measurements,fractionation schemes, diagnosing problems; coagulation to remove EfOM and reduce fouling; and,applications - from the lab bench to real systems. Presentation conclusions indicate the following: we can improve UF treatment of EfOM (and other wastewatermaterials) by understanding speciation effects and using pretreatment, we're now looking at MIEX;autopsies for failed membranes may result in incorrectconclusions (HPO/HPI acids cause fouling, HPO/HPIbase/neutrals stay on top of membrane);coagulation works, even with removal of a portion of HPOacids; EfOM and SMP result in similar fouling; and, big changes in fouling due to alginate, AHA, and SRNOM dueto Ca+2. Includes figures.

Keywords: Fouling; Acids; Wastewater; Coagulation; Membranes; Effluents; Organics; Microfiltration; Reuse; Ultrafiltration

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