Bacterial slimes, commonly referred to as biofilm, are gelatinous mats that resist the flow of water in distribution lines
and through heat exchangers or condenser tubes. A biofilm consists of microbial cells and the extracellular material
they produce. This slime is anchored securely to a surface and provides a protective environment.
Bacterial biofilm is normally of most concern in industrial cooling water systems, since they are normally responsible for
fouling of chillers and heat exchanger. Algae biofilms will also foul distribution decks and tower fill and provide additional
nutrients to support bacterial growth.
Microorganisms can be found in both the bulk water and on industrial water system surfaces.
The bacteria can attach to the surfaces and are extremely difficult to remove.
Slime / Biofilm causes:
Fouling the filtration equipment
Biofilm bacteria can move in numerous ways:
Collectively, by rippling across the surface, or by detaching in clumps.
Individually, through a "swarming or seeding" dispersal.
MICROBIAL INDUCED CORROSION
Another major problem is that biofilms may cause corrosion in the system (MIC). The biofilm sets up a difference
in potential between one area and another. These differences will create anodic and cathodic areas which sets up a
basic corrosion cell. Metal is lost at the anode and the electrons given up by the metal flow to the cathode to be
consumed in a reduction reaction.
HOW DO YOU DESTROY BIOFILM??
AGI recommends using TOWERKLEEN 142!
DIRTY SYSTEM - USAGE RATE: 80 ozs. / 1000 gallons of system capacity (Added every day)
Note: A milk-shake brownish foam will form after about 30 minutes of addition.
MAINTENANCE DOSAGE RATE: 80 ozs. / 1000 gallons of system capacity (Added 1-3 times per week)
***CONTACT YOUR AGI DISTRIBUTOR FOR MORE INFORMATION ***