Energy efficiency for managing the water cycle

We present solutions to maximize the energy efficiency of the entire water cycle. The aim? Conserve natural resources and limit greenhouse gas emissions from the use of fossil fuels.
station d'épuration d'eau à Planques

What are the challenges raised by energy efficiency?

According to the United Nations, 8% of the world's energy production is used for pumping, treating, and transporting water to all the resource’s users. 

Energy efficiency and the use of renewable energy sources are now major issues, but they are in fact two solutions that help conserve natural resources and limit the greenhouse gas emissions caused by the use of fossil fuels.

We are committed to responsibly managing the 6,000 water and wastewater facilities we operate around the world. We have developed a comprehensive range of services for improving energy efficiency and producing renewable energy.

How to maximize energy efficiency for managing the water cycle

In a context of rising energy costs, fewer fossil fuel resources and tighter regulations, we provide numerous energy efficiency solutions. Many of the plants we manage are fully energy self-sufficient.

To improve the energy efficiency of the entire water cycle, we:

  • reduce and manage energy demand
  • optimize plant operation and maintenance
  • purchase primary energy
  • produce green energy for sale.

We install energy production units directly in water treatment plants so that we can use the residual sludge from wastewater treatment as an energy source. 

We use our Ocean 3 tool to precisely estimate the energy consumption of water treatment plants. These measurements cover water, sludge and odor treatment. We then use the data to model the most appropriate solutions with the lowest energy consumption.


  • You reduce your environmental footprint
  • You lower your costs
  • You help recover energy


> Discover also: What is energy sobriety?

What are the benefits for you as a local, regional or inter-regional authority?

Site d'assainissement eaux usées en Hongrie

We did it!



Make a wastewater treatment plant fully energy self-sufficient

Since 2016, the South Pest wastewater treatment plant in Hungary has been energy self-sufficient, thanks to our Ecrusor technology. This solution collects and treats biodegradable waste from local supermarkets and restaurants, as well as the plant's wastewater sludge. The biowaste is then used to produce biogas while packaging is recovered separately. Ecrusor has allowed the operator to process more than 100,000 metric tons a year of organic waste.


United States of America

Save Gresham US$50,000 a month

Following our involvement, the Gresham, Oregon, US, wastewater treatment plant was transformed. Formerly the most energy-intensive site in the city, it has become a zero-energy plant, using biogas from its wastewater sludge and solar energy to power its wastewater treatment operations. The result is that energy costs have been cut from $50,000 a month to zero. Ecrusor has allowed the operator process more than 100,000 metric tons a year of organic waste.