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Every month London spends £1 million cleaning up its sewers, which are clogged with a greasy mass of cooking oils. Now Thames Water and the utility company 20C have unveiled plans to use the gooey mess to produce energy at what is said to be the world’s largest fat-fueled power station. According to The Guardian, the £200 million deal was financed by an iCON infrastructure-led group and it will cover a 20 year period. The project will provide energy for sewage works, a desalination plant , and (if there’s any energy leftover) the national grid.

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Every day, thirty tons of used fats will be collected from a series of eating establishments throughout the city, as well as fat traps and pinchpoints in sewers, where gobs of potential fuel gather, according to The Guardian. This supply will be supplemented with wasted vegetable oil and animal fat to power the plant which is expected to produce 130 Gigawatt hours (GWh) of energy each year – enough to power nearly 40,000 homes.

Under the deal, a £70 million plant is scheduled to open at Beckton in East London. Thames Water will purchase 75GWh of the fat-fueled energy to power the sewage plant, which will provide water treatment facilities for 3.5 million residents. Whatever is left over will be used to run an emergency desalination plant, and if if Thames has sufficient supply, 2OC can feed excess energy into the grid to power local homes and businesses.

Via The Guardian