Many communities in Zanzibar do not have reliable access to water.
Conventional water storage solutions are not ideal: Plastic SIM tanks are expensive and often last only four or five years. Cement-brick tanks are more durable but are very expensive to construct and also consume a lot of scarce resources such as water, mangrove charcoal and other energy to make cement and fire the bricks. These factors put them beyond the reach of many Zanzibari communities.
The quality of the drinking water fluctuates. People who can afford it often drink bottled water which generates a large volume of plastic waste.
German eco-entrepreneur Andreas Froese from Ecotec has developed a novel use for 1.5 litre plastic bottles – construction. Bottles can be filled with soil and non-organic waste then used as bricks for the construction of water tanks, latrines, and community gardens. This concept has been adopted in the community of Mwera in Zanzibar, where two 10,000 litre water tanks have been constructed using ‘bricks’ made from reused water bottles. The weight of plastic reused to build the tanks was considerably less than the conventional plastic ‘SIM tank.’ The sustainable water tanks use significantly less cement than a conventional brick tank and are much stronger and more durable than either construction alternative.
Sustainable East Africa helped by: