Bubble curtain

A bubble curtain is a system that produces bubbles in a deliberate arrangement in water. It is also called pneumatic barrier. The technique is based on bubbles of air (gas) being let out under the water surface, commonly on the bottom. When the bubbles rise they act as a barrier, a curtain, breaking the propagation of waves or the spreading of particles and other contaminants.

A bubble curtain in Florida used to stop debris entering the marina.

Uses

It can be used for the following purposes:

  • to reduce propagation of shock waves (e.g. acoustic waves from engines or pile driving,[1] explosions etcetera),
  • to reduce liquid or debris floating on the surface from spreading [2][3]
  • to prevent salt intrusion[4]
  • to control the movements of fish[5]
  • for decoration and airing in aquariums[6]

In June 2010, Okaloosa County, Florida used air bubble curtains to help protect their Destin Pass coastline from oil produced in the Gulf of Mexico by the Deepwater Horizon oil spill. They hoped to push oil up to the surface for booms and skimming boats to collect the oil. British multinational oil company BP, who the U.S. government named as the responsible party for the oil spill, was billed for the cost of the project.[7]

A pneumatic barrier in a navigation lock in the Netherlands

Equipment

The technical system basically consists of a compressor and pipe or hose with nozzles. When used to reduce acoustic waves from pile driving, a distribution manifold made of plastic or rubber is commonly used.[8]

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See also

References
  1. "Archived copy" (PDF). Archived (PDF) from the original on 2010-07-05. Retrieved 2012-05-06.CS1 maint: archived copy as title (link)
  2. "Archived copy". Archived from the original on 2009-03-02. Retrieved 2009-02-26.CS1 maint: archived copy as title (link)
  3. "Archived copy". Archived from the original on 2005-10-26. Retrieved 2009-02-26.CS1 maint: archived copy as title (link)
  4. Abraham, G.; Van der Burg, P.; De Vos, P. (1973). Pneumatic barriers to reduce salt intrusion through locks. RWS-Communications. 17. The Hague, Netherlands: Rijkswaterstaat.
  5. http://yosemite.epa.gov/R10/CLEANUP.NSF/ph/gasco+photo+gallery! OpenDocument&ExpandSection=1 Archived 2009-05-20 at the Wayback Machine
  6. "Welcome to PET Discounters - PETdiscounters.com". www.petdiscounters.com.
  7. TEGNA. "10News WTSP - Tampa News, Florida News, Weather, Traffic - WTSP.com". 10NEWS.
  8. "Bubble Curtain" (PDF). Archived from the original (PDF) on 2011-07-06. Retrieved 2009-02-26.
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