The new unit arrived on July 18 and will be connected to the existing plant in 2020, the refinery said in a statement on its website.

The plant is owned by Total and Russia's Lukoil . The firms invested 40 million euros ($44.59 million) in the new unit, the statement said.

The addition is part of a global drive to increase diesel production ahead of a major change in marine fuel standards next year that requires vessel to use lower-sulphur fuels.