Patent ID: 7837874
Filing Date: 2010-11-23
Classification: B63B,B63J,C02F,Y10S

Abstract:
1. A water treatment system for destruction of aquatic organisms and microorganisms that may be contained in water being pumped into a ship's ballast tank, comprising: (a) a ballast pump having an intake conduit for drawing water possibly containing aquatic species from a source thereof at a pressure head greater than a predetermined head, and a delivery conduit for delivering the water under pressure falling within a range of 0.7 to 1.4 MPa to a ballast tank; (b) an open-worked screen in the delivery conduit having a plurality of slit-like openings having 200-500 micrometers width, for destroying and killing the aquatic species contained in the water by creating shearing action in the water flowing therethrough; (c) a bypass conduit branching off from the intake conduit to permit inflow of part of the water being drawn by the ballast pump; (d) ozone impregnator means for impregnating with ozone the water flowing through the bypass conduit; and (e) a bypass pump positioned downstream of the ozone impregnator means for returning the ozone-impregnated water into the delivery conduit at a point upstream of the open-worked screen.