Spain - Reusing waste water to reduce fresh water withdrawal

Villaluenga

Cement / Spain

Lafarge's Villaluenga cement plant, located in a dry area of Spain, uses water from the local municipal water treatment plant to reduce fresh water withdrawal. It also designed and implemented a closed-loop water recycling system to make the best use of this water and reduce water discharge.

 

Objectives

  • Reduce the consumption of fresh water for industrial process needs
  • Cut down the water discharge to the public network

Summary

Our Villaluenga cement plant today uses water piped directly from a local municipal water treatment plant to meet its process water needs. The plant also designed a closed circuit system for recycling industrial water to allow the reuse of all water at the plant. Water is mainly used at the plant in conditioning towers and as part of an internal water circuit to cool down equipment.

Today, the Villaluenga plant meets almost all of its industrial water needs through this system, leading to a significant reduction in the fresh water required by the plant. It has also allowed the plant to reduce the quantity of water that it releases into the public network. Today, the only water released is sanitary water and rainwater.

The Villaluenga plant is located in the middle of the Iberian Peninsula, an area with a continental climate with long periods without rain, making it essential to ensure the conservation and optimal use of water resources.

Results

  • A 70,000m3 reduction in water withdrawal each year: the plant now uses water from the local water treatment plant and recycles it, instead of using fresh water resources
  • Significant reduction in water discharge, as water is now recycled and reused on-site.