Wall decay of chlorine in water distribution system

Abstract

Research Article| August 01 2009 Wall decay of chlorine in water distribution system G. R. Munavalli; G. R. Munavalli 1Department of Civil Engineering, Walchand College of Engineering, Sangli 416415, India E-mail: gurumunavalli@yahoo.co.in Search for other works by this author on: This Site PubMed Google Scholar M. S. Mohan Kumar; M. S. Mohan Kumar 2Department of Civil Engineering, Indian Institute of Science, Bangaluru 560004, India Search for other works by this author on: This Site PubMed Google Scholar M. A. Kulkarni M. A. Kulkarni 3Department of Civil Engineering, Walchand College of Engineering, Sangli 416416, India Search for other works by this author on: This Site PubMed Google Scholar Journal of Water Supply: Research and Technology-Aqua (2009) 58 (5): 316–326. https://doi.org/10.2166/aqua.2009.048 Article history Received: May 20 2008 Accepted: January 30 2009 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 G. R. Munavalli, M. S. Mohan Kumar, M. A. Kulkarni; Wall decay of chlorine in water distribution system. Journal of Water Supply: Research and Technology-Aqua 1 August 2009; 58 (5): 316–326. doi: https://doi.org/10.2166/aqua.2009.048 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Chlorination is a widely practised method of disinfection in India. The chlorine consumption in a distribution pipe is due to bulk and wall reactions. The chlorine decay due to wall reactions is particularly significant in old distribution systems with unlined metallic pipes. The estimation of the wall reaction parameter is difficult and is a product of calibration. The approaches adopted for the estimation are pipe column studies and calibration of the chlorine transport model for the water distribution system model. In the present study both these approaches are carried out for a real-life water distribution system. The relative decay of chlorine in cast iron and PVC pipes of different diameters were determined using laboratory experiments. The pipe column studies showed that the chlorine decay rates were significantly higher in CI pipes than in PVC pipes and vary inversely with initial chlorine concentration. The field data on pressure and chlorine residuals was collected for the hydraulic and water quality calibration of the system. The hydraulic calibration of the system was carried out successfully using network flow and a pressure simulation model. Global and zoned wall reaction parameters were estimated using an inverse model applied onto the distribution system. The estimated zoned parameters are marginally better in simulating the chlorine residuals. The wall reaction parameters are found to be inversely proportional to the pipe diameter. The calibration of distribution system for hydraulic flow conditions and water quality is essential for better operation, maintenance and control. calibration, distribution system, residual chlorine, wall reaction parameter, water quality This content is only available as a PDF. © IWA Publishing 2009 You do not currently have access to this content.