Patent ID: 6649065
Filing Date: 2003-11-18
Classification: B01D,C02F,Y10S

Abstract:
A water purification system comprising:means for providing bromine biocide to a cooling tower effluent water stream; a single irradiation chamber consisting essentially of an ultraviolet radiation source providing radiation ranging in intensity from about 200 mWs/cm to 3,500 mWs/cm2 for treating said bromine biocide present in said effluent water stream in an amount ranging from about 0.2 to 5.0 ppm, thereby forming compounds which are less oxidative than said bromine biocide, said effluent water stream flowing through said irradiation chamber exhibiting a turbid appearance and the residual level of bromine biocide present in the irradiated effluent water stream exiting the irradiation chamber is less than or equal to 0.1 mg/l; a deionizer for removing hardness in the form of cations present in said irradiated water; and a separation system for removing suspended and dissolved solids from said deionized water; whereby said formation of compounds which are less oxidative than said bromine biocide protects said deionizer and said separation system from degradation by said bromine biocide.