Unexpected discovery: scientists used unfinished coffee to create biodiesel
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A cup of natural coffee can only brighten them up morning routine, but also to benefit the planet.
Most of us start our day with a cup of aromatic natural coffee, but few people think about what to do with the grounds that remain. Coffee grounds have long been used in the beauty industry as an additive to various scrubs and masks, but scientists have found another unexpected use for morning coffee residue, writes The fish site.
Research shows that around 98 million cups of coffee are drunk daily, and that's just in the UK. It is difficult to imagine how much coffee a day the entire population of the planet drinks. As a rule, after the morning ritual, coffee grounds are thrown into a bucket of food waste, from where it ends up in a landfill or is burned. However, scientists have found that coffee grounds can be an excellent source of energy.
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Dr. Vesna Naidanovich and his colleague Jiawei Wang of the British Aston University were engaged in growing algae, which were then processed into fuel. Scientists have used coffee grounds as “feed” for microalgae (Chlorella vulgaris sp.) and have found that it may well be an excellent source of nutrients.
As a result, scientists have been able to create an advanced biodiesel fuel that provides minimal emissions and excellent engine performance. The researchers also note that their know-how is fully consistent with the requirements of the US and Europe.
In their early studies, scientists grew algae on polyurethane foam and nylon, but these materials do not contain nutrients, and therefore microalgae needed “top dressing”. A little later, scientists discovered that algae were able to grow on coffee grounds, which are abundant in the world and contain all the necessary nutrients, that is, no “feeding” is required.
Researchers also found that keeping algae for light for about 20 hours a day, and then moving them into the dark for another 4 hours, makes it possible to obtain the highest quality biodiesel.
According to the lead author of the study, Dr. . Scientists believe that their biodiesel from microalgae grown on coffee grounds could be the raw material of the future.
Moreover, the researchers suggest that using their know-how will reduce the felling of palm trees, which are necessary for the production of biofuels.< /p>