MEDIA FILTRATION, MEMBRANES, OZONE, AND UV

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ABSTRACT

For reclaimed water disinfection, pathogen reduction to acceptable public health risk levels is the
primary objective. A second emerging objective is the ability to destroy trace pollutants
(endocrine disrupters (EDCs), pharmaceutically active compounds (PhACs)) at a reasonably low
cost.
The WateReuse Foundation’s Innovative Reclaimed Water Treatment Project (WRF 02-009) is
searching for cost-effective treatment technologies that provide substantial barriers to pathogens
and trace pollutants. Findings to date shown substantial removal of bacteria, protozoa, and trace
pollutants by microfiltration (MF) with reduced performance from sand filters. Ozone (O3) and
ultraviolet light (UV) combined with hydrogen peroxide (H2O2) in pilot scale systems have
shown promise for the destruction of pathogens and pollutants at economically feasible dose
values.

KEY WORDS

Ozone, hydrogen peroxide, ultraviolet light, membranes, media filtration, pathogens, endocrine
disrupters, pharmaceutically active compounds

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