Deaeration / Dissolved Oxygen Removal

• Microporous hollow fiber membrane in hydrodynamically optimized contactor designs that enable rapid and efficient gas transfer performance
• Compact, in-line operation with low pressure drop. May help save space, improve productivity, and decrease the number of required pumps
• Broad product portfolio with wide range of flow capacities to meet multiple scales of operation
• Includes membrane contactors designed to handle high liquid pressures – up to 300 psi (20 bar) pressure – and hot water sanitization
• Capable of achieving very low dissolved gas levels down to 1 ppb O2 at outlet with proper system design
• Membrane contactors operate without using chemicals, which could help reduce chemical use in some plant operations requiring dissolved gas control

• Deoxygenating boiler feed water
• Deoxygenation of beverage product water to help protect product from oxidation and may extend shelf life
• O2 removal in ultra-pure water processes to help improve yields and water quality
• Degassing point of use rinsing water and other compatible process solutions in wet bench processes

• AISI 304 stainless steel, TIG weld construction
• 304 and 316 stainless options
• Custom sizes and orientations to meet customer needs
• Polypropylene membrane
• UL listed, 508A control panels

1. How do you clean a deaeration system if you run beer or other beverages through it?

   • The system can be cleaned using standard caustic and acid CIP (clean-in-place) procedures commonly used in beverage processing.

   • To maintain performance and protect the membrane contactor, detergents and low surface tension cleaning agents should be avoided.

   • A detailed cleaning guide is available upon request to ensure proper procedures and long service life.

2. What CO₂ or nitrogen feed gas purity is needed for a deaeration system?

   • Gas purity directly impacts the achievable dissolved oxygen (DO) level.

   • For example, using 99.9% purity gas typically limits performance to around <50 ppb DO. Higher purity gas enables lower DO levels.

   • If your gas supply is below standard purity levels, we can help evaluate expected performance and optimize your setup.

3. What is the lifespan of the membrane contactor in a deaeration system? How do you know when it needs service?

   • The membrane contactor typically lasts 3–5 years in most applications.

     Actual lifespan depends on factors such as:

     • Cleaning frequency
     • Adherence to recommended cleaning procedures
     • Overall operating conditions

     Performance can be monitored over time—a gradual decline in DO removal efficiency is the primary indicator that service or replacement may be needed.

4. What flow rate is required to achieve single-digit ppb dissolved oxygen in a deaeration system?

   • Achieving single-digit ppb dissolved oxygen (DO) with a single membrane contactor depends heavily on water temperature.

   • At 20°C (68°F), reaching single-digit ppb is generally not achievable with a single contactor. However, at elevated temperatures—around 40°C (104°F)—it is possible to achieve <10 ppb at approximately 15 GPM using an 8×20 contactor.

   • This highlights an important point: temperature plays a critical role in DO removal performance, not just flow rate. Higher temperatures improve oxygen removal efficiency, allowing for lower DO levels at practical flow rates.

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