It has been smelting hot in Dakar. The daytime temperature
hovers around 95° F with almost 95% humidity. And on top of that there is no
breeze. But all the heat and discomfort associated with it could not dampen the
enthusiasm of the volunteers who worked tirelessly to filter the beach sand to
collect sand of a specific grain size. The sand is the most important component
of the filter. Using wrong grain of sand in the filter may not remove all the
soap and detergent from the water which may result in the failure of the filter.
The volunteers used home-made sieves
with special screens to collect the specific kind of sand needed for this
filter.
Here is the fully functional filter. This is the final
product of all the hard work of many young volunteers of BanlieueUP group.
Charcoal is used to eliminate bad odors and foreign materials from the water. The water still needs to be boiled for 10 minutes to purify it or use water purification tablets if available. reverse osmosis system
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