A process of anaerobic digestion transforms the rubbish into electricity, which is then piped into the National Grid.
The West London Waste Authority has signed a deal with BiogenGreenfinch, who will transport the waste material to its food plant in Northamptonshire.
Philip Greenaway from BiogenGreenfinch said: "This is fantastic news for us but it's also a tremendous step forward for people living in Ealing, Hounslow and Richmond.
"We already know that the scheme will be very popular with local people and that it makes financial and environmental sense."
Meanwhile, the SELCHP incinerator in south-east London is already burning 420,000 tonnes of household waste a year, generating 29MW of power annually.
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