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De Gasser

A degasser is a crucial component in water treatment processes, employed to remove dissolved gasses from water to improve its quality and prevent operational issues. Here’s a detailed write-up on the role and significance of degassers in water treatment:
Introduction to Degassers in Water Treatment:

Degassers, also known as degasifiers, are devices used to eliminate dissolved gases, primarily oxygen (O2) and carbon dioxide (CO2), from water. Dissolved gases can have detrimental effects on water quality and treatment processes, including promoting corrosion, affecting pH levels, and reducing the efficiency of chemical treatments. De gassers play a vital role in mitigating these issues and ensuring the effectiveness of water treatment systems.

Function of Degassers in Water Treatment:

Degassers function by creating conditions that promote the release of dissolved gases from water.This can be achieved through various methods, including vacuum degassing, membrane degassing, and chemical degassing:

  • Vacuum Degassing:

    In vacuum degassers, water is introduced into a vessel where the pressure is reduced, creating a vacuum. This lowers the solubility of gases in water, causing dissolved gases to escape as bubbles. The degassed water is then collected, while the removed gases are typically vented to the atmosphere.

  • Membrane Degassing:

    Membrane degassers utilize semi-permeable membranes that selectively allow gases to pass through while retaining water molecules. As water passes across the membrane under pressure, dissolved gases diffuse through the membrane and are removed from the water stream, resulting in degassed water.

  • Chemical Degassing:

    Chemical degassers involve the addition of chemical agents to water to react with dissolved gases, converting them into non-gaseous compounds that can be easily removed. This method is often used in conjunction with other degassing techniques to enhance effectiveness.
Significance of Degassers in Water Treatment:

Degassers play several critical roles in water treatment processes:

  • Corrosion Prevention:

    Dissolved oxygen in water can accelerate corrosion in metal pipes, fittings, and equipment. By removing oxygen through degassing, the risk of corrosion is significantly reduced, prolonging the lifespan of infrastructure and minimizing maintenance costs.
  • Chemical Treatment Efficiency:
    Degassing improves the effectiveness of chemical treatments by removing gases that can interfere with the performance of treatment chemicals. This ensures optimal water quality and facilitates the removal of contaminants such as suspended solids, dissolved metals, and organic compounds.
  • PH Control:
    Dissolved carbon dioxide can contribute to fluctuations in pH levels, affecting the overall stability of water and chemical treatment processes. Degassing helps stabilize pH levels by removing carbon dioxide, ensuring consistent treatment outcomes and reducing the need for pH adjustment chemicals.
  • Enhanced Process Efficiency:
    By eliminating dissolved gases, degassers improve the efficiency and performance of water treatment processes, such as ion exchange, membrane filtration, and disinfection. This leads to higher treatment capacities, reduced energy consumption, and improved overall process reliability.

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