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The Mexican jungle village of La Mancalona recently became the first place to test an MIT-designed solar-powered water purification system for rural areas. And consumers there seem to be hooting for the product. Indian villages could do with it too, and soon. The sad fact is that pure and fresh drinking water is increasingly getting scarce in our hinterland, and a lot of families have started boiling water for drinking. The technology for the solar-powered water purification system is simple, sustainable and affordable. So, how does it work? It relies on reverse osmosis. There are essentially two photovoltaic solar panels that power a set of pumps. These pumps push both brackish well-water and collected rainwater through semi-porous membranes, which filter and purify the liquid. The solar-powered system can provide around 1,000 litres of clean water a day for a village with a population of 450-500. Simple to use, villagers can learn to operate and maintain the system on their own.
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