Engineers made environment-friendly bricks from human waste
The engineering students of the University of Cape Town (UCT) have successfully manufactured the environment-friendly bio bricks from the human urine mixed with sand and bacteria.
All the products were mixed together in a process that allows the bricks to solidify at room temperature instead of the normal bricks that are needed to be baked in high-temperature kilns nearly at 1,400 °C for producing large amounts of carbon dioxide. Bio bricks instead produce nitrogen and potassium.
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Dyllon Randall—the supervisor told the BBC News that it is exactly the same way the coral is made in the ocean.
The liquid waste of humans was harvested from men’s toilets out of which a solid fertilizer was made. The remaining liquid was then used in the process known as “microbial carbonate precipitation” for the making of bio bricks.
The bacteria used in the process then produces an enzyme that breaks down the urea found in the urine and forms calcium carbonate, which binds the sand into rock hard, grey bricks.
Furthermore, the strength and the shape of the bio bricks could also be changed. The bricks normally take 4 to 6 days to grow, the number would be increased if much stronger bricks are needed.
As per the reports of Daily Mail, the process takes less than one per cent of domestic waste, however, contain eighty per cent of nitrogen, fifty-six per cent of phosphorous and sixty-three per cent of potassium.
Randall said that this achievement could result in paradigm shifts as how the waste is upcycled.