Point-of-entry water treatment for potable reuse: A ceramic nanofiltration/advanced oxidation hybrid process

Patricio Roa Garduño, Sebastian Kaindl, Jörg E. Drewes, David L. Sedlak

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


More than 75 percent of drinking water provided by centralized drinking water treatment in urban settings is used for purposes that do not require drinking water quality. Water quality can also deteriorate in drinking water distribution systems due to pipe corrosion, microbial regrowth, leaks, or contribution from premise plumbing systems. Point-of-entry potable treatment systems using impaired source water or reclaimed water can thus represent an alternative to centralized treatment and conveyance systems for direct potable reuse, providing that these systems are capable of delivering a water quality that is reliable and protective of public health while minimizing energy and carbon footprint. Ceramic nanofiltration membranes, compared to their polymeric counterpart, have a longer lifespan, withstand chemical cleaning procedures, tolerate discontinuous operation with extended idle times, and can be operated at higher fluxes while delivering similar permeate qualities. This research evaluated the applicability of ceramic nanofiltration membranes coupled with an oxidation process (UV-photolysis) as a point-of-entry direct potable reuse treatment system. The study is focused on attenuation of TOC, taste and odor compounds, chemicals of emerging concern (CECs), salts, and pathogens. The ceramic NF/AOP hybrid system provided effective removal for TOC, hardness, total dissolved solids (TDS), color and taste and odor compounds, as well as CECs. Furthermore, rejection of indicator CECs was dependent upon the degree of fouling and membrane surface properties. This talk will focus on the performance of a ceramic NF/AOP hybrid system for point-ofentry potable reuse as well as concerns related to system implementation, performance, monitoring and compliance in existing infrastructure.

Original languageEnglish
Title of host publicationWater Quality Technology Conference and Exposition 2012
StatePublished - 2012
Externally publishedYes
EventWater Quality Technology Conference and Exposition 2012 - Toronto, ON, Canada
Duration: 4 Nov 20127 Nov 2012

Publication series

NameWater Quality Technology Conference and Exposition 2012


ConferenceWater Quality Technology Conference and Exposition 2012
CityToronto, ON


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