Saturday , October 1 2022

South Africa makes bleaching the world's first human urine


Urine, bio-bricks, ecobrick

Dr. Dillon Randall, one of the first developers of the first white bio in the world that uses human urine as one of the binding ingredients.

One day, when nature calls out, your urine can be more helpful to use than being flush down to the bathroom.

Instead, it can be a key element in building green offices or a new home.

In one of the latest innovations in the search for environmentally friendly building materials, researchers at the University of South Africa have created bricks using human urine.

The first of its kind in the world, brick and brick bricks hold the option of a viable alternative to plain clay brick bricks, they hope.

The prototypes "grew" diuretic using a technique somewhat similar to the natural formation of seashells, using six to eight days.

The breakthrough invention is the initiative of two students at the University of Cape Town and a lecturer.

With a grant from government research and government research, a feasibility study was launched last year using synthetic urea. Then the study escalated to use in human urine.

"I've always been curious to know why we do not use urine to do the same thing," said Dillon Randall, the professor who oversaw one of the two students.

"The simple answer is:" Yes, we can. "

A year later they successfully produced their first bio-lab bricks.

Using a natural process known as carbonate sediment bacteria, they mix urine, sand and bacteria to make the bricks.

The study is still in its infancy. To date, it requires up to 30 gallons (eight gallons in the US) of urine to make only one brick with urine provided by male university students using a special variable.

"Basically, we performed the first bio-bleaching from a real diuretic," Randall said.

"This process is amazing because basically what we did is that we grew bricks at room temperature."

The first three blocks are displayed on the display. They are gray blocks of stone and can not be distinguished from any standard limestone.

Copying the natural processes of nature

Suzanne Lambert, a graduate student in civil engineering, is impressed by the team that copied the "natural processes of nature" to create an ongoing construction process.

"This process mimics the way that corals are formed and the natural processes produce cement," she said.

Conventional or brick bricks that are fired from bricks are produced in furnaces, where they are dried at 1,400 degrees Fahrenheit (2,500 degrees Fahrenheit), a process that causes large emissions of carbon dioxide.

In contrast, bio-bricks is "grown" through loose sand and seeded with bacteria that produce an enzyme called urease.

Urease reacts with urea in the urine to produce a cement-like compound that ties with the sand.

The product can be molded to any form and dry environment temperatures – no furnaces, no greenhouse gas emissions.

"We take something that is considered a waste stream like urine and use it in a completely sustainable process," Randall said.

And for those concerned about the smell of urine seeping from the walls, the good news is that the bricks do not smell. A strong odor of ammonia from the urine dissipates after several days of drying.

Research associate Mukhtari Wachta said the power of bleaching can be adapted to specific construction requirements but those that they have produced so far are "as strong as the common bricks you find in the market".

Bio-bricks have been manufactured in the US, but they use forms of synthetic urine.

These, though, are the first to use a natural human waste.

Is bio-bleaching one day to replace clay material or regular concrete co-workers?

The key factor is price, but at this early stage of development no attempt was made to research costs.

"We're still far from really commercializing this as a full-scale system," Randall warned, but said there is a lot of scope for efficiency gains.

"Right now we need between 20 and 30 liters to make one regular brick.It sounds like a lot, but remember that about 90 percent of the urine is actually water," Randall said.

"We're looking at reducing the amount of urine we require to make a single brick, and I'm sure within the next few years will be much better results." NVG

Related Stories:

Ecobrick: Building Block Saving Our House

Pampanga students build a "bottle school"

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