Don’t let waste go to waste. That’s the approach being adopted by residents in Didcot, UK, where a pilot project is turning their own human waste into energy.
Here’s the science bit. Apparently it works in a similar way to a cow’s stomach. Enzymes are added to sewage sludge that is then collected in airtight vats. These enzymes speed up the anaerobic digestion process and break down the rubbish. Methane gas is produced and, once purified, is ready to use. Apparently the whole process takes
23 days “from flush to finish” and the source “has no odour”. The energy is then supplied via the National Grid to heat 200 homes.
This is a process already successfully employed by the procurement team at Sainsbury’s where leftover food is transformed into energy.
The BBC reports that British Gas, Thames Water and Scotia Gas Networks now hope to introduce the process across the UK.
So if you’re looking for available sources of renewable energy, look no further than your nearest porcelain plumbing fixture