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" ... Solar-powered water pasteurizers. Clean water is a pressing issue in Bangladesh, where in different parts of the country, water is likely to be contaminated by arsenic, sewage, pathogens, or waste from the leather or garment dyeing industry. One response has been to use Bangladesh’s abundant sunlight to make water drinkable. In one project Rabbani and colleagues turned a bamboo tray painted black, a polythene bag, and polythene sheets into a device for destroying diarrheal pathogens in water. The water was encased in a bag, placed on a tray, and covered by polythene sheets. In some trials hay acted as a heat insulator. After about two hours, the water surpassed 70°C and was tested for the presence of germs, both immediately and after months of storage. The devices were piloted with rural families using river water as well as people living in urban informal settlements, where the drinking water was often contaminated. Rabbani says that completing the process twice a day produces enough drinking water for a household of five people. Yet it may be onerous and time-consuming compared to other water purification methods. ... "
" ... “We go through the exact same pasteurizers, the exact same homogenizers...heat exchanges...chilled holding tanks, where it’s right on the same machine.” Dairy processing is so well-developed, says Bowman, that Eclipse is able to take advantage of systems already in place. “We’re not reinventing the wheel here,” he adds. ... "