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MIT2_500s09_project - MIT OpenCourseWare http/ocw.mit.edu...

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MIT OpenCourseWare http://ocw.mit.edu 2.500 Desalination and Water Purification Spring 2009 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms .
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Purification of Water in Phaeton and Paulette Paulette and Phaeton are two sea-side towns on the north coast of Haiti; the estimated populations are 1750 and 2450, respectively. In both villages, the groundwater has been contaminated with seawater and therefore people use it primarily for washing. Field tests confirmed that the well water is contaminated and has high salinity levels. Drinking water is supplied to both towns through a diesel-powered pump system that comes from the neighboring town of Ti Kampeche and costs 1 gourde per bucket (~$0.024); each town has one pump station. Most families use four to five buckets of drinking water per day. Field tests of the pumped water in Paulette gave TDS of 450 ppm; field tests in Phaeton gave 650 ppm. [We believe that the water samples previously collected and distributed to the class may have been drawn from these sources.] In Phaeton, there is one community well with a broken hand pump, which is now drawn with buckets. (It is unclear whether this breakdown was caused by a lack of regular maintenance or by corrosion related to brackish water.) There are also seven hand-dug, bucket-drawn wells on residential plots, which people are permitted to use free of charge. Field testing of the community
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