Sewage

Combining fuel cell with other technologies could provide power for entire water grids, scientists say

Columbia University project backed by Bill & Melinda Gates Foundation aims to turn Ghana's untreated sewage into energy

Second anaerobic digestion facility could see all the effluent produced in the North East converted into renewable energy

Funding decisions for protection schemes must take more account of critical networks, says Institution of Civil Engineers

Newly installed £13m CHP system meets all Lancaster plant's electricity needs, says United Utilities

Experiment could see sewers heat 10 per cent of city with President Sarkozy's Elysee Palace already signed up

Research aims to turn human waste into usable energy

Igloo-shaped system promises to bolster energy efficiency of waste water processing

Report claims waste water and sewage plants could deliver brown power revolution

Solray Energy stakes claim to world's largest algae refinery, which converts toilet wastewater to biofuel