Heat transfer fluids (cooling media) based on propylene glycol and glycerin are environmentally safe due to the fact that their basis (propylene glycol and glycerin) are food additives. However, there is a dark side of the picture: propylene glycol and glycerin are good growth media for various bacteria. Thus, under certain conditions biological (bacteriological) contamination of the heat transfer fluid/solution may happen. This may be shown by growth of white film on the liquid surface or on walls of the equipment, which impairs the heat transfer and increases energy losses, clogs the system and prevents fluid flow.
We treat TEPRO-P, TEPRO-G and TEPRO-Mix heat transfer fluids, which contain propylene glycol or glycerin, with special antibacterial agents which protect against such situations.
If your system has biological contamination, we will analyze its causes, will be able to suppress it and give recommendations for the future.