Oil Industry – Downstream

At Veolia Water Technologies, we support our customers with specialised water treatment services. Our solutions are particularly suited to the specific needs of the downstream oil and gas industry.

Our philosophy: Reduce, reuse, recycle

Veolia Water Technologies is proud to have decades of international expertise in wastewater treatment for downstream industries. With just over 500 reference sites, our teams help our clients overcome their challenges every day.

To be competitive, the major players on this highly competitive market must use the most efficient technologies to minimise production costs and save money. We offer our clients:

  • reliability;
  • the safety and security they need for their operations;
  • the best performance;
  • full compliance with environmental legislation; and
  • genuine ecological commitments for the planet.

Raw water treatment

Water is a major issue during downstream oil and gas processes. A quality product is essential for the smooth running of refining processes. Therefore, we provide our customers with raw water that is healthy and safe.

The raw water produced by Veolia Water Technologies meets the reliability requirements of seawater desalination applications. Our company also:

  • pre-treats process water;
  • produces process water to be fed to boilers and to be used as cooling water; and
  • produces demineralised water for the dilutions that are necessary in petrochemical processes.

Our commitment to Total

Thanks to 3 units of 200 m3/h, Veolia Water Technologies ensures the treatment of process water from the Total refinery in Normandy. The process uses a decarbonation technique on carboxylic resin and proceeds without halting production.

Wastewater treatment 

Respect for the environment is at the heart of our priorities. Veolia Water Technologies treats wastewater generated by oil and gas industrial processes during downstream activities in them. Our mission consists in treating wastewater, rainwater and industrial effluent before it is reused or discharged.

Our treatment process aims to purify the water of elements that are toxic to the environment.
Such pollutants may be of any kind. They include, for example:

  • hydrogen sulphide;
  • DOC;
  • ammonia;
  • hydrocarbons;
  • oils;
  • phenols;
  • DBO;
  • mercury;
  • cyanides;
  • selenium; and
  • chlorides.

It is essential to treat wastewater and remove all traces of pollutants for water of the highest quality. Our technology recycles wastewater by removing pollutants before returning it to the natural environment.

The Renault plant in Tangier, Morocco

Veolia Water Technologies designed and built a "zero liquid discharge" treatment unit that produces demineralised water and treats effluents. This technique reduces total water consumption by as much as 70%. It also avoids any industrial discharge into the natural environment.

Groundwater rehabilitation

To remove dissolved and dispersed hydrocarbons in water, Veolia Water Technologies uses Macro Porous Polymer Extraction (MPPE) water treatment technology. This patented technology, developed in the 1990s by the company Akzo Nobel, has a success rate of 99.9999%.

Particularly effective, this technique has many advantages. It is a process that generates little noise, but is also economically advantageous because it is inexpensive and does not require the addition of chemicals. We offer an automated, remote-controlled and fully guaranteed process.


Water recycling and reuse

At Veolia Water Technologies, we safeguard water and enhance its recycling value by optimising its potential for reuse, through our mastery of our 350 proprietary technologies that cover water issues, in particular during downstream industrial operations. This ecological approach protects the environment in accordance with the law.

By recycling wastewater, we minimise the need for fresh water. Veolia Water Technologies and our subsidiary OTV offer a full range of technologies as well as technical solutions for wastewater treatment and processes to maximise water reuse, because water is a resource that is too precious. This activity reflects our values and our know-how. 


Veolia Water Technologies develops and implements efficient water treatment systems. With more than 500 projects worldwide and decades of sharing our knowledge and expertise with the oil and gas industries, we are a key partner for sustainable growth.


Veolia Water Technologies centres that specialise in the oil and gas industry.

  • North America: Houston, TX - USA +1 832 300 5604
  • South America : São Paulo - Brazil +55 11 3888-8800
  • Europe, Middle East and Africa, Asia-Pacific:     
  • Paris - France +33 1 40 83 66 00 or Glasgow - UK +44 1355 588 000    
Oil & Gas Downstream Brochure (2.02 MB)