QDVC is a joint venture of Qatari Diar and Vinci.
The contract covers the construction of two deep pumping stations at a depth of 40 metres. It also includes the construction of three sewage pipelines each at a length of 3 kilometres. Work on the scheme is due to begin by the end of the first week of February.
The project is worth QR1.78bn ($489m). The client is the Public Works Authority (Ashghal).
With a capacity of 439,000 cubic metres a day, the Doha North wastewater treatment plant will be the largest in Qatar.
Singapore-based Keppel Seghers won the $1.5bn design, build and operate contract for the plant in September 2007.