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Canal wall brushing—a control measure for taste and odour problems in drinking water supplies in arid environments

2003; UWA Publishing; Volume: 52; Issue: 8 Linguagem: Inglês

10.2166/aqua.2003.0048

1365-2087

Q. Hu, Milton R. Sommerfeld, Larry Baker, Paul Westerhoff,

Constructed Wetlands for Wastewater Treatment

Research Article| December 01 2003 Canal wall brushing—a control measure for taste and odour problems in drinking water supplies in arid environments Qiang Hu; Qiang Hu 1Department of Plant Biology, Arizona State University, Tempe, Arizona 85287, USA Tel: +1 (480) 965-6376 Fax: +1 (480) 965-6899; E-mail: huqiang@asu.edu Search for other works by this author on: This Site PubMed Google Scholar Milton Sommerfeld; Milton Sommerfeld 1Department of Plant Biology, Arizona State University, Tempe, Arizona 85287, USA Search for other works by this author on: This Site PubMed Google Scholar Larry Baker; Larry Baker 2Minnesota Water Resources Center, 1985 Buford Avenue, St Paul, MN 55108, USA Search for other works by this author on: This Site PubMed Google Scholar Paul Westerhoff Paul Westerhoff 3Department of Civil and Environmental Engineering, Arizona State University, Tempe, Arizona 85287, USA Search for other works by this author on: This Site PubMed Google Scholar Journal of Water Supply: Research and Technology-Aqua (2003) 52 (8): 545–554. https://doi.org/10.2166/aqua.2003.0048 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Share Icon Share Twitter LinkedIn 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 Qiang Hu, Milton Sommerfeld, Larry Baker, Paul Westerhoff; Canal wall brushing—a control measure for taste and odour problems in drinking water supplies in arid environments. Journal of Water Supply: Research and Technology-Aqua 1 December 2003; 52 (8): 545–554. doi: https://doi.org/10.2166/aqua.2003.0048 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Canal wall brushing, accomplished by a tractor-mounted custom-designed rotating metal brush, was an effective means of removing nuisance periphytic cyanobacterial growth and consequently reducing MIB and geosmin production in the Arizona Canal, a major water conveying open channel in the metropolitan Phoenix (Arizona) water supply system. On average, c. 80% of the periphyton biomass was removed from the canal walls, resulting in immediate reduction in MIB and geosmin concentrations. Recolonization of periphytic cyanobacteria and other microalgae on the canal walls occurred following brushing, and algal biomass (chlorophyll a concentration) reached pre-brushing levels within 2 weeks. However, the production of MIB and geosmin was significantly reduced in the brushed section of the canal during this period of time. The extended duration of the effectiveness of brushing therefore did not appear to be due to the reduced total periphytic biomass, but rather the influence on species composition and population density of MIB and geosmin producers. Thus, slow recovery of MIB- and geosmin-producing cyanobacterial populations probably accounts for the reduced MIB and geosmin production. The brushing technique may be particularly applicable to open concrete-lined canal water supply systems and fish culture impoundments that contain point sources of periphyton-associated MIB and geosmin production. canal wall brushing, cyanobacteria, drinking water, geosmin, 2-methylisoborneol (MIB), surface water supply This content is only available as a PDF. © IWA Publishing 2003 You do not currently have access to this content.