New street lamp powered by dog poo

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Brian Harper, a resident of the Malvern Hills, in Worcestershire, has developed a way to power the area’s street lamps using canine excrement. The system uses an anaerobic digester attached to the street lamps and is the UK’s first dog-poo powered street lamp. To power the lamp, dog walkers collect the faeces in a bag as usual, then deposit the bag in the anaerobic digester attached to the lamppost and turn the handle. The excrement is heated and mixed before being broken down by microorganisms, giving off biomethane to power the light, and producing fertiliser. Harper is a member of…

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