Coffee to power buses too
BRITISH company bio-bean, which already turns waste coffee grounds into tiny charcoal-brickets to heat up buildings, next plans to also press biodiesel from the old coffee grinds.
The 21-strong company’s young CEO Arthur Kay vision is to collect 50 000 tons from next year, dry the beans and separate the oil to power London’s buses.
He designed the closed-loop process using a biochemical process called hexane extraction while at university and says the solvent used in the extraction process is 99,9% recyclable.
Unlike cooking oil, coffee grounds also don’t require a lot of expensive filters before it can be used in a car and the husks of the beans will still become an very effecient fuel for boilers in buildings. — WR.
A British start-up plans to use coffee grinds to make biofuel.