Cof­fee to power buses too

The Witness - Wheels - - MOTORING -

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.

PHOTO: BIOBEAN

A Bri­tish start-up plans to use cof­fee grinds to make bio­fuel.

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