title: Pilot-scale UV/H2O2 advanced oxidation process for surface water treatment and downstream biological treatment: effects on natural organic matter characteristics and DBP formation potential.
abstract: The effects of the advanced oxidation process (AOP) of ultraviolet radiation in combination with hydrogen peroxide (UV/H2O2) on the structure and biodegradability of dissolved natural organic matter (NOM) and on the formation of disinfection by-products (DBPs) through the post-UV/H2O2 chlorination were investigated using UV reactors equipped with either low-pressure amalgam lamps or medium-pressure mercury vapour lamps. With electrical energy doses and H2O2 concentrations typically applied in full-scale UV systems for water remediation, the UV/H2O2 AOP partially oxidized NOM, reducing its degree of aromaticity and leading to an increase in the level of biodegradable species. Also, when combined with a downstream biological activated carbon (BAC) filter, UV/H2O2 AOP reduced the formation of DBPs by up to 60% for trihalomethanes and 75% for haloacetic acids. Biological activated carbon was also shown to effectively remove biodegradable by-products and residual H2O2.
authors.affiliation: Trojan Technologies, 3020 Gore Road, London, ON N5V 4T7, Canada. sssarathy@trojanuv.com
authors.forename: Siva R
authors.initials: SR
authors.lastname: Sarathya
authors.forename: Mihaela I
authors.initials: MI
authors.lastname: Stefan
authors.forename: Alan
authors.initials: A
authors.lastname: Royce
authors.forename: M
authors.initials: M
authors.lastname: Mohseni
mesh_terms: D002606:Charcoal / Q000737:chemistry; D005557:Formaldehyde / Q000302:isolation & purification; D006861:Hydrogen Peroxide / Q000737:chemistry* / Q000302:isolation & purification; D009930:Organic Chemicals / Q000737:chemistry*; D010865:Pilot Projects; D014466:Ultraviolet Rays; D018508:Water Purification / Q000379:methods*
chemical_list: D009930:Organic Chemicals; D002606:Charcoal; D005557:Formaldehyde; D006861:Hydrogen Peroxide