SA Students Invent 'Urine Bricks'

Dr Dyllon Randall (L), who supervised the project, pictured with students Vukheta Mukhari and Suzanne Lambert

University students in South Africa say they have created new environmentally-friendly bricks using human urine.

The students from Cape Town combined urine collected from men's toilets with sand and bacteria - in a process that allows the bricks to solidify naturally at room temperature.

They say an enzyme in the mixture breaks down the urine to produce calcium carbonate - a key component of limestone - which binds the other materials together.

Regular bricks need to be baked in high-temperature kilns, that produce large amounts of carbon dioxide.





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