Ceramic pot filters lifetime study in coastal Guatemala.
Ceramic pot filters (CPFs) are an effective means of household water treatment, but the characterization of CPF lifetimes is ongoing. This paper describes a lifetime field study in Guatemala which was made possible by a collaboration between researchers, CPF-using households, and local non-governmental organizations (NGOs). Disinfection data were collected periodically for two years using field coliform enumeration kits as were flow rate data with the assistance of NGO staff. Consumer acceptance was characterized by surveying householders in the four subject villages at the beginning and end of the study. Flow rate data showed that average CPF flow rates decreased below the recommended minimum of 1 L h-1after 10 months of use; however, the survey results indicated that the consumers were tolerant of the lower flow rates, and it is reasonable to assume that the daily volume of treated water can be readily increased by refilling the CPFs more frequently. Of greater concern was the finding that disinfection efficacy decreased below the recommended bacterial reduction after 14 months of use because it would not be obvious to users that effectiveness had declined. Finally, the follow-up visits by the researchers and the NGO staff appeared to increase consumer acceptance of the CPFs.
Missouri University of Science and Technology, 129 McNutt Hall, 1400 N Bishop Ave, Rolla, MO 65409, USA E-mail: cs4m2@mst.edu.
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Salvinelli
Missouri University of Science and Technology, 129 McNutt Hall, 1400 N Bishop Ave, Rolla, MO 65409, USA E-mail: cs4m2@mst.edu.
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Elmore
Ministry of Agriculture, Livestock and Food of Guatemala, DIPESCA Office, second floor, Km 22 Carretera al Pacífico, Edificio La Ceiba, Bárcena, Villa Nueva, Guatemala.
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García Hernandez
Department of Geosciences, University of Missouri-Kansas City, 420 Flarsheim Hall, 5110 Rockhill Road, Kansas City, MO 64110, USA.
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Drake
D002516:Ceramics / Q000032:analysis*; D004203:Disinfection / Q000295:instrumentation / Q000379:methods*; D060766:Drinking Water / Q000032:analysis*; D005374:Filtration / Q000295:instrumentation / Q000379:methods*; D006166:Guatemala; D018508:Water Purification / Q000295:instrumentation / Q000379:methods*
D060766:Drinking Water