Guide to Implementing the Three-Barrier System

What is it?

Efficient water management is essential for water-intensive industries, particularly canneries located in sensitive coastal environments. This guide, developed by AZTI with the support of the LIFE Programme, introduces the Three-Barrier System, a methodology designed to reduce water consumption and improve wastewater management at source, strengthening the eco-efficiency of the production process.

What does this guide offer?

It presents a proven, structured and ready-to-implement methodology for canning plants, which can also be adapted to other food industry sectors. The guide provides practical tools—such as indicators, action plans and improvement examples—to monitor water use, reduce waste and move towards more sustainable production.

Key contents

• Description of the Three-Barrier System:
  • 1st Barrier: Reduction of water consumption and prevention of raw material losses.
  • 2nd Barrier: Retention and recovery of solids and fats for reintegration into the process.
  • 3rd Barrier: Smart management of partial effluents through storage, treatment and controlled dosing.
• Practical examples applied to processes such as washing, cooking or cooling, including specific measures and case studies.
• Key indicators to monitor performance and assess improvements in water efficiency, pollutant load and productivity.

Who is it for?

Canning companies, production technicians, environmental consultants and decision-makers interested in implementing practical solutions to reduce the environmental impact of their processes. This guide is also a valuable resource for advancing towards a more eco-efficient and competitive agri-food industry.