Now a coffee can be turned into biodiesel. Apparently, Aston University scientists have now produced high-quality biodiesel microalgae that feed on coffee. According to Aston University’s statement, this development is also considered a breakthrough in the microalgae breeding system. The results of the study were published in the November 2022 issue of Renewable and Sustainable Energy Reviews.
About Coffee Grounds-Microalgae-Biodiesel Relationship
According to Aston University, around 98 million cups of coffee are drunk in the UK every day. This results in a large amount of used coffee grounds, which are treated as general waste and often end up in landfill or incineration. However, scientists have discovered that used coffee grounds serve as a structure for microalgae (Chlorella vulgaris sp.) and also as a food source.
Microalgae are single-celled organisms that live in seas and fresh waters and are capable of photosynthesis. Microalgae produce about half of the oxygen in the atmosphere. There are hundreds of thousands of different species of microalgae. The most common types of microalgae are diatoms (Bacillariophyceae), green algae (Chlorophyceae) and golden algae (Chrysophyceae).Dr. Tuba Sarıgül
As a result, they were able to produce advanced biodiesel with low emissions and good engine performance that meets US and European standards. Until recently, algae was grown on nutrient-free surfaces such as nylon and polyurethane foam. But scientists have discovered that microalgae cells can thrive on leftover coffee without the help of other nutrients.
Biodiesel from microalgae added to used coffee grounds could be an ideal choice for the commercialization of new feedstocks and avoid competition with food products. Furthermore, using this new feedstock could reduce the felling of palm trees to extract oil to produce biofuels. In Southeast Asia, this has led to continued deforestation and increased greenhouse gas emissions.Dr. Vesna Najdanovic