membrane degasifiers: simple and efficient removal of corrosive gases from water

continuous operation ideal for deoxygenation, decarbonation, and gas control of liquids

CHEMICAL-FREE AND LOW PRESSURE DROP

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Membrane degasification systems bring the gas and liquid phases in contact with a hydrophobic membrane. The membrane allows the gas to pass through it but blocks the passage of water. This creates a large contact area that facilitates a high-effcient gas transfer and removal from the main liquid stream.

1. Typical gases present in water and other liquids

The air in the atmosphere contains approximately 78% of Nitrogen and 21% of Oxygen. Whenever a gas is in contact with water it dissolves into it. This way Nitrogen (N2) and Oxygen (O2) naturally dissolve into water that is in contact with air.  
 
At atmospheric pressure, water will contain around 8.5 mg/l of O2 and 14.1 mg/l of N2 when it is in contact with the air.
 
Similar to O2 and N2, The carbon dioxide (CO2) present in water will originate from the CO2 in the atmosphere. Common minerals such as calcium carbonate (CaCO3) and magnesium carbonate (MgCO3) also dissolve in water forming carbonate, bicarbonate, carbon dioxide, calcium and magnesium ions. The amount of dissolved carbon dioxide will depend on how much calcium carbonate and magnesium carbonate have dissolved as well as the pH and temperature of the water.
 

 

H2S is another gas typically present in ground water aquifers at concentrations of 0.5 to 5 mg/L as a consequence of the dissolution of minerals in conjunction with the presence of anaerobic bacterial activity. H2S gas can be easily detected as it usually smells similar to rotten eggs and can represent a health risk in high concentrations and long exposure time.

 

2. Benefits of using membrane degasification

3. Getting it right: selecting the appropriate degasification system for each application

At Watercore, we are experts at ensuring that you choose the right degasifier for your application. Above all, our range of commercial and industrial membrane degasification systems will provide the optimal solution to many corrosion problems.
 
Similar to to other water treatment systems, the sizing of a membrane degasifier will depend on a number of factors including dissolved gases, flow rate required, required % of gas removal and type of application. However our technical sales team are available to help you with all aspects of design, from the sizing of the unit to the best and most practical location.
 

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