Closed Loop Treatment

Closed Loop systems require careful evaluation and special monitoring techniques

Considerations Include:

• Makeup rate
• Oxygen intrusion
• Contaminants
• Metallurgies
• Temperature
  and Pressures
• System volumes
• Flowrate
• Filtration
• Freeze protection

Special monitoring often required:

• Inhibitor levels
• pH
• Conductivity
• Microbiological levels (aerobic and anaerobic)
• Ammonia
• Corrosion coupons
• Corrosion byproducts (iron, copper)

Understanding the closed loops and proper monitoring allows the proper design of chemical treatment. Often a system needs to be cleaned and sterilized with treatments such as peracetic acid and/or hydrogen peroxide. Other cleaning programs can effectively remove corrosion products or other deposits. Ongoing treatment will require inhibitors and non-oxidizing biocides.