A bio-fuel made with waste coffee grounds is powering some of London's iconic buses.
Commuters and their conveyance will have something in common as the fuel containing 20% bio-component, which includes coffee oil, has been used on the bus network since Monday (November 21).
Environmental start-up bio-bean has come up with the new fuel which makes use of some of the 200,000 tonnes of coffee ground waste produced by Londoners every year.
By collecting the waste coffee grounds from high street chains and instant coffee factories, bio-bean removes the oil and processes it into a "B20" biofuel for use in London buses.
Many of London's buses already make use of biofuels derived with waste such as used oil and animal tallow but this is thought to be the first time fuel derived with coffee has been used.
Biofuels are a cleaner and more sustainable energy source then fossil fuels and the B20 fuel can be used in buses without the need for modification.
bio-bean won the Mayor's Entrepreneur Programme in 2012 and went on to create "Coffee Logs", an alternative fuel source and households.
The company's founder Arthur Kay said: "Our Coffee Logs have already become the fuel of choice for households looking for a high-performance, sustainable way to heat their homes."
The start-up pitched the biofuel concept to petrochemical giant Shell, which invested in the idea as part of its #makethefuture campaign.
"Now, with the support of Shell, bio-bean and Argent Energy have created thousands of litres of coffee-derived B20 biodiesel which will help power London buses for the first time," Mr Kay continued.
"It's a great example of what can be done when we start to reimagine waste as an untapped resource."
Sinead Lynch, Shell UK Country Chair, said: "When it comes to clean energy, we are always looking for the next inventive solution.
"A good idea can come from anywhere, but with the scale and commitment of Shell, we can help enable true progress.
"We're pleased to be able to support bio-bean to trial this innovative new energy solution which can help to power buses, keeping Londoners moving around the city - powered in part by their waste coffee grounds."
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