The brainchild of Limpopo-born social entrepreneur, Murendeni Mafumo, Kusini Water is a locally designed water purification system that uses an activated carbon filter made from macadamia nut shells.
The device purifies at least 1 000 liters of water a day. It uses the nut shells, not so much for their chemical properties but for their strength.
They also work to harness the use of nanotechnology fibers to separate various bacteria from the water.
You do not see the nut shells in the filter – they are incinerated and processed, and are part of the system that cleans water from any source.
The nut shells, which would have been discarded, are sourced from a small-scale farmer in Venda, Limpopo.
Mafumo was referred to the Tikelo Intermediary School by the Gauteng Education Department for good reason, the school is located in an intensive beef-producing area.
“The local beef industry produces a lot of manure,” explains Mafumo.
“That dung seeps into the groundwater and increases the levels of E. coli, which is what we found in the water in the school. This was problematic because the water was being used by little children”.
The 33-year-old father of one is no stranger to being professionally involved with water. Having worked in the water and sanitation departments of the cities of Cape Town and Johannesburg for eight years in total, he knows what it takes to provide settlements with safe drinking water.
Mafumo says his company’s biggest challenge is to make the device sustainable.
“At least two out of three projects in the water space are donor-funded, and it has been shown that 50% of socially driven projects in communities fail within two years because communities do not have the resources to keep them going,” he says.
“In Heidelberg we have tried to make it as automated as possible, and it can be controlled remotely. This ensures that the system knows when it will need maintenance”.
Mafumo says it costs about R50 000 to set up the device with the tanks. His company model is simple, for every filter or liter of water a company sells through its other water products, it gives 20 liters of safe water to communities that do not have any.
Kusini Water launched its first system nearly two years ago in Shayandima, and its first mobile water container in October last year. The latter supplies water to the community of Extension 10 in Emalahleni West.
“I started my company three years ago to work with communities outside of the main water networks. The biggest challenge they face is either that they are getting water brought in from tanks for which they have to queue – and the tanks do not arrive every day – or they have JoJo tanks. But with the latter, over time there may be health effects – for example, E. coli growth in the tanks,” he says.
Mafumo is part of the third cohort of Redbull’s Amaphiko initiative, which supports local entrepreneurs for 18 months. The next cohort will be inducted on June 15.
“Three years ago, I was purely a scientist,” says Mafumo. “The aim of Kusini Water is to bring about a systemic change in communities currently underserved when it comes to water and sanitation”.