Method and apparatus for killing microorganisms in ship ballast

Details Method and apparatus for killing microorganisms in ship ballast Method and apparatus for killing microorganisms in ship ballast

1997-08-29

1999-08-03

Woo, Jay H.

Liquid purification or separation

Processes

Chemical treatment

210764, 210205, 210258, 210259, C02F 120

Patent

active

059321121

ABSTRACT:
A method and apparatus for treating ship ballast water before it is discharged into coastal waters. The ballast water may contain harmful non-indigenous microorganisms. Before discharge, the ballast water is oxygenated and deoxygenated to reduce the populations of anaerobic and aerobic microorganisms, respectively. If anaerobic microorganisms are of no concern, the oxygenation step can be eliminated.

REFERENCES:
patent: 3251357 (1966-05-01), Williamson
patent: 3676983 (1972-07-01), Nold
patent: 4316725 (1982-02-01), Hovind et al.
patent: 5180403 (1993-01-01), Kogure
patent: 5192451 (1993-03-01), Gill
patent: 5376282 (1994-12-01), Chang
patent: 5578116 (1996-11-01), Chang
Public Announcement: "Ship Ballast Water Could Be Treated to Prevent Release of Non-native Organisms" National Reseach Council, Jul. 3, 1996.

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