UV photooxidation facilitating biological treatment for the removal of NOM from drinking water

Abstract

Research Article| September 01 2002 UV photooxidation facilitating biological treatment for the removal of NOM from drinking water J. Thomson; J. Thomson 1Cooperative Research Centre for Water Quality and Treatment, Private Mail Bag 3, Salisbury, S.A. 5108, Australia and Department of Chemical & Metallurgical Engineering, RMIT, GPO Box 2476V, Melbourne, Victoria 3001, Australia Search for other works by this author on: This Site PubMed Google Scholar F. A. Roddick; F. A. Roddick 1Cooperative Research Centre for Water Quality and Treatment, Private Mail Bag 3, Salisbury, S.A. 5108, Australia and Department of Chemical & Metallurgical Engineering, RMIT, GPO Box 2476V, Melbourne, Victoria 3001, Australia Tel.: +61-3-9925-2080 Fax: +61-3-9925-3746; E-mail: felicity.roddick@rmit.edu.au Search for other works by this author on: This Site PubMed Google Scholar M. Drikas M. Drikas 2Cooperative Research Centre for Water Quality and Treatment, Private Mail Bag 3, Salisbury, S.A. 5108, Australia and Australian Water Quality Centre, Private Mail Bag 3, Salisbury, South Australia 5108, Australia Search for other works by this author on: This Site PubMed Google Scholar Journal of Water Supply: Research and Technology-Aqua (2002) 51 (6): 297–306. https://doi.org/10.2166/aqua.2002.0026 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Cite Icon Cite Permissions Search Site Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll JournalsThis Journal Search Advanced Search Citation J. Thomson, F. A. Roddick, M. Drikas; UV photooxidation facilitating biological treatment for the removal of NOM from drinking water. Journal of Water Supply: Research and Technology-Aqua 1 September 2002; 51 (6): 297–306. doi: https://doi.org/10.2166/aqua.2002.0026 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex The effects of UV-C (254 nm) radiation on the biodegradability and chlorine demand of natural organic matter (NOM) were investigated. Biodegradability was assessed using the biological regrowth potential and biodegradable dissolved organic carbon (BDOC) methods and remained unchanged for doses of 40 to 1,000 mJ cm−2, but increased when the water was exposed to higher doses. The DOC concentration and UV absorbance values were reduced in UV-treated waters, but the chlorine demand remained the same as for raw water. Exposure of the UV-treated water to microbial treatment (via the BDOC test) gave a reduced DOC concentration and chlorine demand, indicating that the chlorine-consuming compounds resulting from irradiation were biodegradable. High performance size exclusion chromatography showed that both biodegradability assessment methods preferentially removed smaller molecules. Formaldehyde, acetaldehyde, glyoxal and glyoxylic acid were detected in UV-treated waters and were removed by the BDOC test. Chlorine demand correlated well with the concentration of low molecular weight (LMW) carbonyl compounds, which can be considered to be a surrogate for a large number of unidentified organics contributing to the chlorine demand and biodegradability. biodegradable dissolved organic carbon (BDOC), chlorine demand, drinking water, low molecular weight carbonyls, natural organic matter (NOM), ultra-violet (UV-C) photooxidation This content is only available as a PDF. © IWA Publishing 2002 You do not currently have access to this content.