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Biofilm is a thin slimy layer that readily forms on the inner surfaces of pipes. It is a safe habitat for Legionella bacteria to live and breed. Biofilm is the biggest breeding ground for bacteria in water systems.
The figure right shows how biofilm develops on the inner surfaces of pipes of water systems. Biofilm develops there where the temperature is right for growth and where there is a nutrient source. Nutrients can be scale, sediment, corrosion products, trapped organic and inorganic molecules supplied by the flowing water.
The copper and silver ions penetrate biofilm. This can initially cause an increase in total viable and Legionella bacteria counts due to the bacteria becoming freely suspended in the water by being released from the biofilm. Because these bacteria would otherwise continue to proliferate in biofilm to high numbers, it is therefore important that treatment to control Legionella, also, includes biofilm control.
The Orca system is the only system that has proven to attack and remove biofilm.
Short film on how the Orca system works
