At Tiyani Secondary School in rural South Africa, the lunchtime stew is now cooked with gas made from cattle dung. The school installed a biogas digester that turns manure into cooking fuel, a first for the area and a surprising solution to rising energy costs.
A digester turns waste into a daily flame
The system works simply: cow dung is fed into a sealed tank, where bacteria break it down and release methane gas. That gas is piped to the school kitchen, where it powers the stoves for hundreds of meals each day. The leftover slurry is not wasted either. It is spread on the school's vegetable field, helping to grow the very produce that ends up in those pots.
Why the school made the switch
Tiyani Secondary School is in Limpopo province, a region where many households rely on wood or coal for cooking. The school used to buy expensive gas and struggled with unreliable supply. Now, with cattle from nearby farms providing a steady source of manure, the school has cut its fuel costs and no longer worries about running out of gas midweek. Teachers say the project also gives students a hands-on lesson in renewable energy and waste management.
Local farmers and students pitch in
Volunteers, including students and community members, collect the dung and load the digester. The school has become a small hub of activity, with people stopping by to see how the system works. For the village, the project is more than a cost saver. It shows that a resource once seen as waste can power a kitchen, fertilize a field, and keep a school running.
A model that could spread
The success at Tiyani has caught attention in neighboring villages, where schools face similar challenges. The digester is not a high-tech marvel, but it is reliable and locally manageable. As South Africa looks for ways to ease pressure on the grid and reduce deforestation from firewood collection, this school offers a simple, replicable example. One school's lunch is now a quiet proof that energy can come from the ground beneath a farmer's feet.
