Portsmouths Integra South East Energy Recovery Facility (ERF) which is part of the Hampshire Waste Strategy was officially unveiled by HRH The Duke of York.
The site will process 165,000 tonnes of non-recyclable waste annually, simultaneously generating 14MW of electricity that will be supplied to the National Grid and power 14,000 homes.
Jean-Robert Mazaud scooped an Edward Hambly medal from the Institution of Civil Engineers for its design and the Duke of York featured in a ceremony which included presentations, speeches and the unveiling of a commemorative plaque.
He said: This is an immense step and a very brave and sensible step on the road to greater understanding on how we should manage our waste. I think everyone would agree that environmental husbandry is vital for our future security.
Veolia Environmental Services (VES) will run the facility under contract with Hampshire County Council (HCC), Portsmouth City Council and Southampton City Council.
HCC executive member for environment councillor Mel Kendal said: Just three years ago, all Hampshire waste that couldnt be recycled was sent to landfill. Now, with the introduction of three energy recovery facilities - of which this Portsmouth building is one example - we divert four fifths of all waste away from landfill.
This is an enviable achievement, the result of partnership working, and were edging ever closer to the day when we can eliminate landfill disposal for Hampshires household waste.
VES chief executive for UK and Northern Europe Cyrille du Peloux was equally glowing about the new facility.
He said: We are deighted that HRH The Duke of York has so kindly agreed to open the Integra South East ERF. This represents another significant investment in Hampshires waste management system which is rightly regarded as an example of best practice nationwide.