title: Impact of UV-H2O2 Advanced Oxidation and Aging Processes on GAC Capacity for the Removal of Cyanobacterial Taste and Odor Compounds.
abstract: Cyanobacteria and their taste and odor (T&O) compounds are a growing concern in water sources globally. Geosmin and 2-methylisoborneol (MIB) are the most commonly detected T&O compounds associated with cyanobacterial presence in drinking water sources. The use of ultraviolet and hydrogen peroxide (H2O2) as an advanced oxidation treatment for T&O control is an emerging technology. However, residual H2O2 (>80% of the initial dose) has to be removed from water prior final disinfection. Recently, granular activated carbon (GAC) is used to remove H2O2 residual. The objective of this study is to assess the impact of H2O2 quenching and aging processes on GAC capacity for the removal of geosmin and MIB. Pilot columns with different types of GAC and presence/absence of H2O2 have been used for this study. H2O2 removal for the operational period of 6 months has no significant impact on GAC capacity to remove the geosmin and MIB from water.
authors.affiliation: UNSW Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales (UNSW), Sydney, New South Wales, Australia. ; Department of Civil Engineering, University of Toronto, Toronto, Canada.
authors.forename: Arash
authors.initials: A
authors.lastname: Zamyadi
authors.affiliation: Australian Water Quality Centre (AWQC) - South Australian Water Corporation (SA Water), Adelaide, South Australia, Australia.
authors.forename: Emma
authors.initials: E
authors.lastname: Sawade
authors.affiliation: Australian Water Quality Centre (AWQC) - South Australian Water Corporation (SA Water), Adelaide, South Australia, Australia.
authors.forename: Lionel
authors.initials: L
authors.lastname: Ho
authors.affiliation: Australian Water Quality Centre (AWQC) - South Australian Water Corporation (SA Water), Adelaide, South Australia, Australia.
authors.forename: Gayle
authors.initials: G
authors.lastname: Newcombe
authors.affiliation: Department of Civil Engineering, University of Toronto, Toronto, Canada.
authors.forename: Ron
authors.initials: R
authors.lastname: Hofmann
keywords: GAC; UV–H2O2; advanced oxidation; cyanobacteria; granular activated carbon; taste and odor; water treatment