Ecolab Case Study: Steel Manufacturers Saving Water

Water Reuse at a Mexicali Power Plant – Ecolab Case Study

This case study looks at the steps taken by Nalco Water to help reduce concentrations of calcium, sulfate, and chloride in a power plant’s cooling tower in order to improve the plant’s use of grey water.

Primary Functions

  • Learn how Nalco Water used 3D TRASAR technology at a power plant in Mexicali to minimize water use and reduce scaling.

Detailed Description



Caring for natural resources ranks high on the list of priorities for Termoelectrica, a power plant in Mexicali, Baja California, Mexico. At the same time, the power plant must balance its need to reliably respond to power demand fluctuations from heavy agriculture and industry in the area. The cooling tower became the focus for optimizing water and energy savings as well as improved staff safety.


The plant uses grey water in its cooling tower, which reduces the plant’s freshwater use. But grey water can carry high concentrations of calcium, sulfate and chloride, which contribute to scaling and performance issues. Nalco Water conducted studies to determine the optimal cycles of chemical concentration in the cooling tower to minimize water use and avoid scaling. The team implemented 3D TRASARTM Technology for Cooling Water to reduce scaling which included continuous monitoring of performance from a remote control room and the application of cutting-edge chemical products.

“Nalco Water has unique polymers that work via charge reinforcement to carry impurities out of a cooling tower before they settle as scale and deposits,” said Fernando Garcia, district manager, Nalco Water. “We tailor our solutions to the specific conditions and needs of our customers. Our customized approach helped Termoelectrica significantly improve use of grey water in its cooling tower.”


Additional information




Topics & SDGs

WWF Mitigation