The green gas revolution has continued with the second project in a week connecting to the National Grid.

The three anaerobic digesters at brewers Adnams distribution site in Suffolk followed Centrica's biomethane gas pilot project in Didcot, which uses sewage sludge as its feedstock.

The brewer's renewable energy subsidiary, Adnams Bio Energy, is set to generate up to 4.8 million kilowatt-hours per year - enough to heat around 235 family homes – from 12,500 tonnes of brewery and food waste, creating green gas from material that would have otherwise gone to landfill.

In the future it should produce enough renewable gas to power the Adnams brewery and run its fleet of lorries, while still leaving up to 60 per cent of the output for injection into the National Grid.

Waitrose is the first business to sign up to supply waste to the facility and has committed to sending food waste from seven of its nearby branches and one John Lewis store.

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