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.
Click here to run an energy price comparison, and see if you could be paying less for your gas and electricity.
Save hundreds of pounds on your household energy bills today. Just enter your postcode to get started.
Latest supplier prices change: 24 March 2016Price updates