Archives for January 2011
How to Build a $3 Solar-Powered Water Purification System
2 January 2011 | Solar Power | No Comments
Last year we talked several times about many water purification devices, but none of them wasn’t as cheap as this new solar powered water purification system developed by UW students.
The idea of using solar rays to clean water is an old one. Usually when solar rays pass through a plastic bottle filled with water, it removes more than 99.9 percent of bacteria and viruses. Sun rays can be very efficient in cleaning water, but to do this it takes some time (the water can not be instantaneous purified) and we don’t know when their job is done.