Envisan was incorporated in 1992 by 2 companies: Peeters Putboringen and Dirkse Milieutechniek, a Dutch constructor of treatment plants.
Envisan was a pioneer in Belgium and soon started executing challenging remediation projects.
In 1996, Envisan was taken over by Jan De Nul Group. When executing dredging and civil excavation works, the mother company was increasingly confronted with polluted soils and sediments and therefore needed in-house expertise in this field.

The acquisition was an opportunity to both parties. For Jan De Nul Group, it provided a necessary service, for Envisan it resulted in increased financial, technical and commercial strength.

In that same year, the remediation market boomed following the introduction of soil legislation in Flanders (Belgium). Over the following years, Envisan's activities steadily increased thanks to the introduction of new techniques but also due expansion into the international market from year 2000.


  • Daughter company Envisan International is incorporated for executing environmental works in the Walloon region (southern region of Belgium), partly inspired by the introduction of separate regional environmental legislation.
  • The first own soil treatment centre, 'Noorddok', is built and operated in Gent (Belgium).


  • Envisan acquires the company MAV ('Mest- en afvalverwerking')*, this way taking its first steps towards waste processing.
  • Manure and waste processing


  • The first important project abroad is started. In Zagreb (Croatia) a landfill is redeveloped for EBRD.
  • A second own soil treatment centre, 'Hulsdonk', is built and operated in Gent (Belgium) to meet the strongly increased soil volumes to be treated. As well as to polluted soils and  sediments are treated here. The new centre is expanded in several phases up to about 32.5 acres.


  • Envisan has its first project in Russia. For the city of Saint Petersburg polluted sediments are removed from the city's canals to prepare for the celebration of its tri-centenary anniversary.


  • Purchase of the first mobile desorption plant with a maximum capacity of 40 t/h.
  • Execution of first on-site thermal project on the sites of a petrochemical plant in Antwerp (Belgium).
  • Envisan executes its first project in Italy. Sediments from the Venice lagoon are treated using an innovative washing technique.
  • Incorporation of a Temporary Storage Site (TOP) in the Brussels Capital Region (Belgium). Both polluted and non-polluted soils are stored here before being discharged to a treatment centre.


  • Start of the second waste management project abroad, now in Hungary. In the region of the Mid Donau-Tisza plain, waste transhipment stations and a composting plant are built. Work also included the clean up of illegal landfills to make room for a state-of-the-art sanitary landfill.
  • Start of the first phase of the long-term project 'Dredging and treatment of sediments from the canal Gent-Terneuzen (Belgium)'. The contract entails maintaining the canal's water depth through the annual dredging and treatment of ca. 80,000 m³. At least 80 % of the treated volume is reused in construction projects.


  • Setting up of a branch establishment in Pisa (Italy).
  • Start of the first project in France, i.e. the rehabilitation of the landfill Mines d'Or de Salsigne in the north of Carcasonne.


  • Construction of the first Walloon soil treatment centre in Ghlin (Belgium), named 'Sol&Val'. Here, biological treatment is applied with a licensed capacity of 80,000 tonnes per year.
  • Large-scale remediation project in Sfax (Tunisia) entailing the excavation of gypsum-contaminated beaches and the design and construction of an impermeable storage location.
  • Start of our first project in Ireland at Waterford. A former gas works is remediated, approximately 40,000 m³ of soil polluted with several contaminants is excavated and transported to treatment centres on the continent.


  • Start of our first project in the Netherlands. Treatment of more than 200,000 m³ of dredged sediments, of which minimum 75 % had to be reused in construction projects.
  • Incorporation of Envisan France with office in Lille.


  • Start of a large-scale project for the removal and treatment of hundred thousands of m³ of oil sludge in Pitesti, Romania. To this purpose, an innovative fluidised bed technology-based plant was developed and built in-house.


  • Design and construction of AMORAS, an ambitious dewatering plant for dredged sediments in the port of Antwerp (Belgium). The total annual treatment capacity of the plant amounts to more than 750,000 tonnes of dry substance or more than 3,000,000 m³ of wet sediments, which makes this plant the biggest of the world. Two years later, the plant's 15-year operation commenced by the joint venture Sereant.


  • Start of a large-scale project for dredging and removing sediments from canals and rivers of the Walloon region. In several phases, over 1 million m³ of sediments is treated on the water itself using a mobile plant.
  • For the first time, the total turnover of Envisan exceeds € 50 million.


  • Execution of first brownfield project in France, i.e. the remediation in view of its redevelopment of the former gas works site in Terken. Over 25,000 tonnes of polluted soil was excavated and transported to an external thermal treatment plant.


  • Construction and operation of the treatment centre 'Sedival' in Moen (Belgium) for dewatering dredged sediments. The centre is situated on top of a covered former household waste dumpsite


  • Envisan France obtains all required permits and starts with the construction of the first French treatment centre for dredged materials in Toulon. Start of operations is scheduled for the second half of 2014.
  • Setting up of a branch establishment in Bucharest.