Many of the projects and prototypes we see @ Maker Faire are related to water. Of course … water means life in Africa. But if there is water, it is not always clean … so to find ways to achieve clean water is a huge challenge.
Here are two prototypes (via Africagadget) which are dealing with this problem:
Cleaning massive amounts of water with chlorine:
Suprio Das is part of the water-cleansing team with Killian Deku, Laura Stupin and Bernard Kiwia. Besides the ball-valve doser (see below), they’ve also created a siphon mechanism chlorine filter. It, like all of the IDDS work, uses locally available materials.
This particular project attaches to a hand pump and can cleanse unlimited amounts of water. Best of all, it has no moving parts, so it is less likely to break or wear down over time. It works by dripping chlorine into the water when a certain water level is reached. Then, the water comes pouring out in batches.
Ball Valve Chlorine Doser
With one 5 liter bag of chlorine, and a device that costs $3 to build, you can clean 100,000 liters of water.
Here at Maker Faire Africa is Killian Deku, a Ghanaian working in the IDDS program, has created a ball valve chlorine doser with the help of his team mates from India, the US and Tanzania. Their only real costs were the ball valve and the time taken to create the bamboo structure that holds it. The one variable cost is the bag of chlorine used to cleanse the water.