Aeration with Ceramic Membrane Discs

Extremely fine distributed gas bubbles through rotating ceramic membranes. Investigations at the University of Rostock have shown that by an additional rotation of the ceramic membrane discs an average gas bubble size of 10-20 µm can be obtained (compared to 50 µm with the static discs/air in water). In the case of aeration with CO₂ no gas bubbles are visible by the use of rotating ceramic membrane discs – the CO₂ is directly solved in the liquid.

Principle
The inside of the membrane disc is applied with pressure through a channel structure. Gas flows through the micro porous material. Thus superfine distributed gas bubbles are created on the membrane surface. The discs can be arranged horizontally or vertically. Inseration of bubbles also in systems under pressure and near the boiling poin.

Applications

• Flotation
  The efficiency of flotation processes is clearly increased by the application of KERAFOL discs. The superfine distributed
  gas bubbles lead to an accelerated aggregate formation of dispersed particles and thus to a more effective separation.
  The gas bubbles are created directly in the medium at the membrane surface (no dissolved air flotation).
• Ozonation
  By the use of micro porous ceramic membranes ozone can be inserted most effectively into liquids. The extremely fine
  distributed gas bubbles remain in the liquid for a very long time (minimised ozone losses).
• Oxygenation
  In combination with oxygen there are a lot of advantages in applications with fish farming and aquaria.

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