Unbelievable! Lab bricks from human urine

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While technology is proving tough to keep up with the new developments,research is also cooking bombshells like the use of human urine to make bricks in South Africa.The wonder grey bricks are produced in a lab over eight days using urine, calcium, sand and bacteria. Fertilizers are also produced during the processes. And no, the bricks do not smell.

“We literally pee this away every day and flush it through the sewer networks,” said Dyllon Randall, a senior lecturer at the University of Cape Town’s civil engineering department who is part of the team that developed the brick. “Why not recover this instead and make multiple products?

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South African researchers say they have made bricks using human urine in a natural process involving colonies of bacteria, which could one day help reduce global warming emissions by finding a productive use for the ultimate waste product.

Bio-bricks are created through a process called microbial induced carbonate precipitation, which is similar to the process that naturally produces coral reefs. Loose sand is colonized with bacteria that produce the enzyme urease. The enzyme breaks down the urea in urine, while producing the rocky substance calcium carbonate through a complex chemical reaction.

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A brick or column of any shape can be made. The bricks are formed at room temperature, cutting the harmful carbon dioxide emitted when making regular bricks that are kiln-fired. One obstacle preventing mass production: the bricks use huge amounts of pee.

To make a single brick requires about 20 liters of urine – a couple of weeks’ worth of wee for a typical adult. “So, I get it from the boys bathroom opposite the laboratory. I put a little sign up and all the university boys contribute to my research,” said Suzanne Lambert, who proved the concept for the research by making the first brick.

I definitely see commercialization in the next decade or two, but there is still a lot of lab work to be done,” she said.

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The term brick refers to small units of building material, often made from fired clay and secured with mortar, a bonding agent comprising of cement, sand, and water. Long a popular material, brick retains heat, with-stands corrosion, and resists fire. Because each unit is small—usually four inches wide and twice as long, brick is an ideal material for structures in confined spaces, as well as for curved designs. Moreover, with minimal upkeep, brick buildings generally last a long time.

In Kenya mostly  bricks are made by just by using locally available soil mixed with cement and sand, you can make bricks that can be used to make affordable, yet beautiful buildings.

Do you think Kenyans can embrace building bricks made from urine?

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