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Spent Coffee Grounds Have Fascinating Uses

 

DISCOVERIES

‘Double Shot at Life’

A new study found that used coffee grounds will be important for future engineers and address the issue of finite resources, New Atlas reported.

Scientists discovered that replacing sand with spent coffee grounds (SCG) can make concrete up to 30 percent stronger.

Globally, about 60 million tons of coffee grounds are generated each year, making it the largest waste product from coffee making – with the majority ending up in landfills.

SCG can serve as good fertilizer and the organic material has been proposed as a useful component for construction applications because of its fine particle size.

In their experiments, a research team collected coffee grounds from cafΓ©s in Melbourne, Australia, dried them, and heated them at two different temperatures – 662 and 932 degrees Fahrenheit – using a low-energy, oxygen-free process called pyrolysis.

Through this process, the researchers produced different types of biochar which they combined with concrete, with the SCG acting as a replacement for fine aggregate – in this case, natural sand – at different percentages.

Their findings showed the concrete’s strength increased by 29.3 percent when the team replaced 15 percent of sand with biochar pyrolyzed at 662 degrees Fahrenheit.

Lead author Rajeev Roychand explained that the study aims to give SCG a “‘double shot’ at life,” noting that the results are promising and could be used in construction globally.

Specifically, the authors hope that the study can provide a solution to the overuse of sand in concrete production, which damages the environment.

“With a circular-economy approach, we could keep organic waste out of landfills and also better preserve our natural resources like sand,” according to co-author Jie Lie.

Magical Winter Agriculture In Antarctica

 

DISCOVERIES

‘The Taste of Summer’

Antarctica is currently experiencing its winter period that is marked by subzero temperatures and almost perpetual darkness.

Still, these factors did not stop Russian scientists at the Vostok Station in Antarctica from successfully growing watermelons on the frozen continent, the Washington Post reported.

Agricultural researchers planted the large fruits at a station greenhouse as a part of an experiment to grow plants in Russia’s polar regions.

Because they had no proper soil and sunlight, they grew the watermelons using a combination of soil substitutes, fertilizers and special lighting. They also had to pollinate the plants by hand because there were no bees or other pollinators to do the job.

After planting the watermelon seeds in early April and pollinating them in late May, the first fruits grew by July.

The research team explained that the watermelons’ “taste and aroma are not worse than” domestic ones. The eight fruits that emerged were up to 5.11 inches in diameter and the heaviest one weighed around 2.2 pounds.

“Naturally, all polar explorers were happy to remember the taste of summer,” said Andrey Teplyakov, a geophysicist at the Arctic and Antarctic Research Institute, which runs Vostok Station.

Teplyakov and his colleagues have already grown other plants, such as tomatoes and peppers, at the station. They hope to plant other crops in special greenhouses, including berries and cucumbers.

Meanwhile, the farming experiments are also intended to test the potential of agricultural production at future outposts in space.


The Romanian Section Of Comintern