Europe’s first geothermal power plant

that uses seawater for heating and cooling is using improved screening technology from ANDRITZ SEPARATION

Built and operated by Engie, Thassalia is a marine geothermal power station at the Port of Marseille Fos, France – the first in Europe to use the sea’s thermal energy to supply buildings with power for heating and cooling. It will heat and cool 500,000 m2 of space, thereby reducing greenhouse gases by 70%. In October 2016, the plant started supplying energy to the new Marseille district Ecocité Euroméditeranée.

The challenge: 

Develop a screen that can withstand the rigors of the sea

OTV, a specialist in wastewater and water treatment, was awarded the seawater loop design and construction on the project, and was searching for reliable separation equipment that is resistant to wear and corrosion. OTV knew the ANDRITZ Aqua-Guard was reliable and efficient, but they had no details on the material or the solutions needed to prevent wear and corrosion from seawater. As a trusted key supplier, they asked ANDRITZ SEPARATION to supply two fine screens to protect the downstream equipment, especially the pumps and heat exchangers.

Our solution: 

Customized development of the popular ANDRITZ Aqua-Guard

With more than 6,000 references and recognized as the most efficient headwork screen, the ANDRITZ Aqua-Guard is already a popular, tried-and-tested choice. The challenge called for a solution that is resistant to corrosion from seawater, and the extensive record of the ANDRITZ Aqua-Guard in seawater and desalination equipment proves that the simple and reliable screen is suited to marine applications.

The ANDRITZ SEPARATION specialists supplied a frame made of painted steel, protected with sacrificial anodes and internal elements in duplex. Already familiar with the efficiency and reliability of our fine screening technology and experience in seawater intake, the customer was also convinced by the lower investment cost. The solution was agreed: Two ANDRITZ Aqua-Guard fine screens.


A corrosion-proof screen with a long lifespan

The already excellent relationship between OTV and ANDRITZ SEPARATION meant that a solution could be developed and the contract signed within just a few months. Being a local supplier was an added benefit, as this ensured the availability and proximity of services. What’s more, the investment cost came in lower than expected, thanks to the innovative materials solution applied to a highly reliable product.

The ANDRITZ Aqua-Guard has a lifespan of up to 20 years and, by adapting the frame finish and adding sacrificial anodes, it can withstand the rigors of the sea and will play a part in heating and cooling the homes of thousands of people in Marseille for years to come.

Find out more ...

Contact us
  • Sewater for heating and cooling

    Europe's first geothermal power plant is using improved screening technologies from ANDRITZ

    PDF : 480 KB