MEASURING EFFECTIVENESS OF SODIS IN KATHMANDU

Jun 21st, 2015
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One-third of the population in developing countries has no access to safe drinking water. The lack of adequate water supply and sanitation facilities causes a serious health hazard and exposes many to the risk of water-borne diseases.

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A Case Study on MEASURING EFFECTIVENESS OF SODIS IN KATHMANDU VALLEY Submitted in partial requirement for the fulfillment of the Master's degree in Environmental Science Submitted To:C0LLEGE OF APPLIED SCIENCE-NEPAL (CAS-N)(Affiliated to Tribhuvan University)Anamnagar, Kathmandu, NepalSubmitted By:KRISHNA SHRESTHATU Registration No. 5-2-38-1013-2007Symbol No. 18134Feb, 2014Executive SummaryOne-third of the population in developing countries has no access to safe drinking water. The lack of adequate water supply and sanitation facilities causes a serious health hazard and exposes many to the risk of water-borne diseases. In Nepal also water quality problems are frequently exacerbated by unsafe water storage practices and source contamination on both urban and rural regions of the country. In case of Kathmandu valley almost drinking water sources have been contaminated due to the unsafe sanitation and sewerages. SODIS, Solar Water Disinfection, is a technology use to treat the drinking water in house hold level that improves the microbiological quality of drinking water, using solar UV-A radiation and temperature to inactivate coliform (FC). So, this study was focused on the effectiveness of SODIS in Katmandu valley in winter season (January) with different alternatives in one liter PET bottles. The results revealed that SODIS is highly efficient in Kathmandu valley in winter season too. In comparison to clear full water bottles, the water in b

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