Homg Komg Sludge Treatment

A twenty-first century treatment plant: reconciling urban ecology and lifestyle

The sludge treatment plant built by Veolia in Hong Kong is much more than just an industrial site. It is a truly environmentally friendly complex that is autonomous and self-sufficient in energy and water.

Hong Kong SAR China


Built for the energy efficient treatment of sludge from eleven wastewater treatment plants in this region with 7.2 million inhabitants, the plant is completely autonomous in water and energy. Sludge weight will be reduced by 90% through incineration and residues will be buried in landfills, whereas today all sludge goes to landfills. The plant's installed capacity makes it the largest wastewater sludge incineration unit in the world.  600 m3 of drinking water is produced every day by a sea water desalination plant on the site. This water is used by the ecological complex for its operational requirements.
A waste water recycling circuit avoids discharging effluents into the sea.
Sludge treatment produces over 14 MW of electricity which is more than the site needs to operate. The excess electricity produced is therefore distributed on the public network.


Veolia asked the French architecture firm, Claude Vasconi to propose a highly innovative architectural concept for the seven-hectare complex.
Inspired by the local landscape, the building, situated between waves and hills, blends in with the environment.  
Ecological gardens dedicated to local biodiversity will be open to the public. It will be integrated into a complex that includes a discovery gallery about the plant, a cafeteria with a view of the sea, a heated swimming pool, a conference room and an observation platform under the roof of the building to admire the view of Deep Bay and Shenzhen.

Régis Calmels 
Senior Executive Vice President Asia

"The plant we are building in Hong Kong is truly innovative both from a technical and social point of view. The plant uses the most efficient and environmentally friendly sludge treatment technologies and will be a real tool of urban ecology accomodation leisure activities. Veola is very proud to be contributing to invent treatment plants of the future."


Key figures

  • Incineration capacity of 2,000 tons of sludge per day
  • 600m3 of desalinated water produced every day
  • 14 MW of electricity produced
  • 15 years operating contract

Customer benefits

  • Preservation of quality of life
  • Control of the overall environmental footprint


  • Engineering and building treatment plants
  • Desalination and water production
  • Wastewater recycling
  • Energy recovery from sludge
  • Operation, maintenance and optimization
  • Management and human capital


600m3 of desalinated water produced every day

Preservation of quality of life