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Air Liquide
Air Liquide worldwide
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Engineering & Construction


Large projects


Waste & Water management

From waste to resources

In a world with growing populations and natural resources scarcity, our industrial society is challenged by competing priorities: the ongoing search for productivity and the need to tackle environmental issues. In addition to increasing output, industries must reduce their polluting emissions, improve their processes for a maximum reuse of water and materials, while complying with increasingly strict regulations.

Helping industries reduce their environmental impact

Industrial gases can offer alternative solutions to the traditional water and waste treatment processes, providing environmental benefits in competitive manners. At Air Liquide, we leverage our gas expertise and technologies to develop these solutions proactively.

The challenge of attaining maximum efficiency at reasonable costs

Our R&D and application experts are continuously designing new gas offers that will become the industry benchmark of tomorrow.

Our goal is to help customers reduce their environmental impact and conform to the strictest of environmental legislation. To rise to the challenge of attaining maximum efficiency at reasonable costs, we work hand-in-hand with our customers to implement competitive gas solutions and therefore deliver results when and where it matters most.

Air Liquide experts are in the field to find the best solutions for our customers.

Mastering applications for the management of waste and water

At Air Liquide, we master applications using gas technology to treat water, recycle metal, recover solvents, analyze air quality and valorize waste.

Focused on performance, we go beyond gas and propose a full solution combining equipment and expertise to meet client needs. We work with our customers in the way that suits them best.

Water treatment

For industries, municipalities and water utility companies, Air Liquide offers Nexelia™ all-in-one solutions, which encompass drinking water, process water and wastewater. Nexelia™ offers are the result of longstanding collaboration with our customers to understand their challenges and specific needs.

Nexelia™  leverages our know-how in:

  • pH control
  • Biological treatments
  • Odor control and foam removal
  • Water purification
  • Scale prevention

Our expert teams design and implement our solutions on site to ensure the expected performance. They can also provide a quick response in case of troubleshooting.

Air pollution control

We help customers implement our clean technologies, which are fully integrated and cost-effective. This not only improves their bottom lines, it also increases productivity while reducing energy consumption and emissions.

Air Liquide also supplies analytical gases for air quality monitoring laboratories and industries. Our ALPHAGAZ™ range of pure gases and calibration mixtures is designed specifically to run analytical equipment and ensure high accuracy in use.


The manufacturing industry must increase existing production capacities while minimizing its environmental footprint. Air Liquide helps customers to recycle waste in the paper, glass and metals domains.

Air Liquide is also present at every step of the biomethane value chain and supports the circular economy: from waste to mobility. Indeed, Air Liquide works with various partners to convert waste into bioenergy.