The Chemistry Institute of the Vietnam Science and Technology Academy says its method is low cost, easy to set up and operate, and does not use electricity, oil and gas or chemical substances.

Initial trials conducted on a shrimp farm in southern Ben Tre province, a kindergarten in central Thua Thien-Hue province and some households in other localities have brought positive results.

The method involves pouring saltwater into a glass-roof container and using the heat of the sun to evaporate pure water, leaving salt behind. The freshwater is then siphoned into a tank for everyday use.

According to Nguyen Tien Tai, head of the scientists group, he and his colleagues are conducting research to improve the method's efficiency and make it possible to distill freshwater during the evening.

"To this end, we will use energy charged equipment available in Vietnam at low cost," Tai said.

According to the Ministry of Natural Resources and Environment, a similar method was successfully developed by the Ha Noi University of Technology and its Ho Chi Minh City-based counterpart, but results found it expensive with low capacity.

This article appeared on www.english.vietnamnet.vn

May 20, 2008

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