METHOD AND APPARATUS FOR TREATING BALLAST WATER
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United States of America Patent
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Issued Date -
Apr 8, 2010
app pub date -
Mar 18, 2008
filing date -
Mar 22, 2007
priority date (Note) -
Abandoned
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Abstract
At the time of loading a ship, ballast water is sent to a ceramic filter membrane having a mesh of 9 to 12 μm by a filtration pump, and at the time of unloading, ballast seawater is sent to the membrane by the filtration pump to be filtrated under pressure. Thus, marine organisms larger in size than this mesh are removed. The permeated water containing marine organisms smaller in size than the mesh is sterilized with a chemical agent made of chlorine or ozone in a facility for sterilizing with chemical agent, and then discharged into the sea or poured into the ballast tank. With this, it is possible to purify a large amount of ballast water, in a short time, into a level at which the water quality standard according to the guideline can be cleared without requiring any large-sized facility or any high-concentration chemical agent.
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