Patent ID: 8506886
Filing Date: 2013-08-13
Classification: A61L,B01D,B01J,C02F,H05B

Abstract:
1. An apparatus for treating fluid comprising: a housing comprising an inlet for receiving fluid to be treated and an outlet for delivering treated fluid, the housing defining a fluid flow path between the inlet and the outlet; a light transmitting substrate in the fluid flow path; a semiconductor photocatalyst adhered to the substrate, the photocatalyst comprising at least a first photocatalyst with a first band gap wavelength; at least one first light source operable to deliver light to fluid in the housing to be treated, said at least one first light source emitting at least one first band of light having a center wavelength in the range from 250 nanometers to 285 nanometers so as to provide disinfection treatment of the fluid; and at least one second light source operable to deliver light to the photocatalyst in the fluid in the housing to be treated, said at least one second light source emitting at least one second band of light having a center wavelength at or below the first band gap wavelength so as to provide a photocatalytic reduction of contaminant concentrations in the fluid, and the center wavelength of the second band of light being above the center wavelength of the first band of light.