Slimy Deposits

Slimy deposits in water systems are often caused by biofilm. Biofilm is a thin layer consisting of microorganisms, organic matter and substances produced by the microorganisms themselves. Nearly all water systems develop some degree of biofilm over time, although the extent depends on water quality, temperature, flow conditions and construction materials.

In most cases, biofilm is a natural phenomenon, but excessive growth can contribute to odour problems, discolouration, blockages and reduced hygienic water quality. Biofilm may also provide an environment where other microorganisms can establish and grow more easily.

Did You Know?

The small screen located at the outlet of many faucets is not only designed to catch sand, rust and other particles. It often also captures small fragments of biofilm released from the inside of the plumbing system. If you have ever removed a faucet screen or inspected older pipes, you may have noticed a thin slimy layer on the surface. In many cases this is biofilm. The phenomenon is similar to the slippery rocks often found along shorelines and streams, although the microorganisms and biological composition typically differ between natural environments and engineered water systems.

Common Causes

• Natural Biofilm Formation in Pipe Systems
• Low Flow or Stagnant Water
• Elevated Organic Matter
• Elevated Water Temperature
• Insufficient Disinfection or Hygienic Barriers
• Long Retention Times in Tanks or Pipework

Common Symptoms

• Slimy Surfaces in Faucets or Pipes
• Deposits on Filters or Strainers
• Clogged Nozzles and Fixtures
• Taste or Odour Issues
• Particles Released from Internal Pipe Surfaces

Common Treatment Methods

• Water Analysis
• Pipe Cleaning and Flushing
• UV Disinfection
• Ozone or Other Oxidation Methods
• Reduction of Stagnation Zones
• Improved Hygienic Operation and Maintenance

Example Treatment Trains