Optimization of clean water circuits
Controlling water consumption and waste from the food industry

Cooling water and boiler water are generally used at high flow rates. Water consumption can be reduced by adopting closed or semi-closed circuits, or by using reheated water at other manufacturing stations.

• Adoption of closed or semi-closed cooling circuits

  The following key points must be observed.

  In closed circuits, the water is cooled by contact with a secondary fluid (air or water) and is then recycled without contact with air. In semi-closed circuits, on the other hand, the water is cooled by evaporation in an atmospheric cooler before being recycled.

  Water-cooled refrigeration compressors should be replaced by air-cooled compressors. Cooling systems can be upgraded with chillers, tubular or plate heat exchangers. In wineries, wastewater cooling should be eliminated,...