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TP - Scientific project carried out by Nguyễn Ngọc Anh and Phạm Duy Linh, Can Tho university students awarded Holcim Prize 2011 on 20-9 and their research will be sponsored by Holcim Vietnam company for adoption in coastal and island area.

Being born and growing up in Kiên Giang coastal area, Phạm Duy Linh, student from batch 34th of Environment and Natural Resource Dept, under Can Tho University thouroughly understand the hardship of fresh water shortage of local people. At dry season, fishmen have to buy freshwater which is tens of km far from theor homes and costed upto nearly 120.000đ/m3.

Linh wishes to help coastal area people  access freash water for domestic use sine he started hie univiversity in 2008. Meet the like-willed  classmate Nguyễn Ngọc Anh, the registed the project "Designing equipment for extracting fresh water from sea water at household scale” appying for Holcim Prize 2011.

The equipment use solar energy  for condencing sea water into fresh water. Sea water come into the tank at high position and flow to the rectangular condensing unit at lower position and boiled by solar energy with an themo absorbing unit.

The hot water evaporates and condensed, flow to the tank. This technology use easily available materials such as coconut matting, aluminum pipe. According to Mr. Lê Hoàng Việt, Deputy head of Environment and Natural Resource Dept, under Can Tho University The condensed water is no longer salty, meeting standards for drinking.

Tính ra, cứ mỗi mét vuông bề mặt tiếp xúc cho ra khoảng 5 lít nước ngọt mỗi ngày. Chi phí cho 1 m2 mặt tiếp xúc khoảng 400.000 đồng. Nếu đầu tư khoảng 30m2 mặt tiếp xúc, tốn khoảng 12 triệu đồng, có thể thu 150 lít nước/ngày, đủ cho hộ gia đình sinh hoạt. Thiết bị có tuổi thọ 8-10 năm, có thể đặt ở bờ kênh, nếu đặt bể chứa trên cao, phía dưới vẫn canh tác bình thường.

Cty Holcim Việt Nam cam kết hỗ trợ khoảng 150 triệu đồng để nhóm của Anh và Linh mở rộng áp dụng triển khai thực tế.

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