Patent ID: 8900461

Claim:
A method for treating ship ballast water using electron beams, comprising: supplying the ballast water, and continuously introducing irradiating electron beams into the supplied ballast water to induce radiolysis of water sufficient to kill harmful marine organisms present in the ballast water and destroy cell walls of cells the organisms and release extracellular polymeric substances from the destroyed cell walls by radicals produced by the radiolysis by injecting the electron beams into the ballast water under operating conditions of an energy of 0.5-5 MeV, an electron beam irradiation dose of 0.1-30 kGy and a flow rate of 1-200 m 3 /hr; and inducing three-dimensional crosslinking between the cells with the extracellular polymeric substances serving as a flocculant, forming flocs by bioflocculation, and settling the flocs.