Toilet power is the fuel of the future in the UK where waste from Manchester's loos will help contribute to local gas supplies. Manchester's toilets will soon be contributing to the local gas network under a green energy project planned by United Utilities Group and National Grid.
The companies plan to turn a by-product of the wastewater treatment plant into gas for the local network and fuel for a fleet of sludge tankers. Biogas is produced through a process called "anaerobic digestion" when wastewater sludge is broken down by the action of microbes.
The biogas will be upgraded to remove carbon dioxide and trace elements, leaving biomethane which will be conditioned with propane and odorants before being pumped into the network and back into their homes.
The 4.3 million pound project should be operational by early 2011 and supply enough gas for about 500 homes. Biogas in this case offers a steady energy as sewage treatment is a 24x7 process. Perennial power?
With sizeable populations as in developing nations, this should be an ideal energy source.
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