Aston University produce algae-based biodiesel grown on leftover coffee grounds

November 2, 2022 |

In the UK, two Aston University researchers have produced high-quality biodiesel after ‘feeding’ and growing microalgae on leftover coffee grounds.

In just the UK, approximately 98 million cups of coffee are drunk each day, contributing to a massive amount of spent coffee grounds which are processed as general waste, often ending up in landfill or incineration.

However the researchers found that spent coffee grounds provide both nutrients to feed, and a structure on which the microalgae (Chlorella vulgaris sp.) can grow.

As a result, they were able to extract enhanced biodiesel that produces minimal emissions and good engine performance, and meets US and European specifications.

The study, “Enhancing growth environment for attached microalgae to populate onto spent coffee grounds in producing biodiesel,” appears in the November 2022 issue of Renewable and Sustainable Energy Reviews.

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Category: Research

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