Thousands of UK residents will soon be cooking with “poo-power”‘. In a national first, water firms including Severn Trent, Wessex Water and Northumbrian Water are preparing to pipe a continuous supply of biomethane gas directly from sewage-treatment plants into the National Grid. In the past, water firms have used gas produced in sewage treatment to generate electricity on site, but this will be the first time advanced technology to treat methane will produce high-quality biomethane suitable for use in homes. Severn Trent was first to activate its gas-to-grid systems, this week, injecting 1,200m3 of biomethane into the Grid from Minworth sewage works in Birmingham. When fully operational, it will inject 750m3 of biomethane into the Grid every hour, enough to fuel 4,200 homes annually. Both Severn Trent and Wessex Water intend to pipe a continuous supply into the Grid by mid-October. Wessex Water’s gas-to-grid project at the Bristol sewage works will be the first and largest plant of its kind, using food waste as well as sewage to produce up to 2,000m3 of biomethane an hour, enough to fuel 8,300 homes for a year. Food waste, said spokesman Ian Drury, generates “twice as much” biogas as sewage.