Systems and methods for performing the bacterial disinfection of a fluid using point radiation sources

• US 10,029,026 B2
• Filed: 01/08/2018
• Issued: 07/24/2018
• Est. Priority Date: 12/19/2008
• Status: Active Grant

• Current Assignee: AquiSense Technologies LLC: (Nikkiso Company Limited), University of North Carolina At Charlotte (University of North Carolina System)
• Original Assignee: AquiSense Technologies LLC: (Nikkiso Company Limited), University of North Carolina At Charlotte (University of North Carolina System)
• Inventors: Stokes, Edward Brittain, Pagan, Jennifer Godwin, Schmedake, Thomas Andrew
• Primary Examiner(s): Orme, Patrick James
• Application Number:
  US15/864,095
• Publication Number:
  US 20180147314A1
• Time in Patent Office: 197 Days
• CPC Class Codes: A61L 2/10 Ultraviolet radiation
• CPC Class Codes: A61L 2209/11 Apparatus for controlling air treatment
• CPC Class Codes: A61L 9/205 using a photocatalyst or photosensitiser
• CPC Class Codes: C02F 1/32 with ultraviolet light
• CPC Class Codes: C02F 1/325 Irradiation devices or lamp constructions
• CPC Class Codes: C02F 2201/3222 Units using UV-light emitting diodes [LED]
• CPC Class Codes: C02F 2201/3225 Lamps immersed in an open channel, containing the liquid to be treated
• CPC Class Codes: C02F 2201/3227 Units with two or more lamps
• CPC Class Codes: C02F 2201/3228 Units having reflectors, e.g. coatings, baffles, plates, mirrors
• CPC Class Codes: C02F 2201/326 Lamp control systems
• CPC Class Codes: C02F 2201/328 Having flow diverters (baffles)
• CPC Class Codes: C02F 2209/11 Turbidity
• CPC Class Codes: C02F 2303/04 Disinfection
• CPC Class Codes: C02F 2305/10 Photocatalysts
• CPC Class Codes: G01N 21/031 Multipass arrangements
• CPC Class Codes: G01N 21/33 using ultraviolet light G01N21/39 takes precedence
• CPC Class Codes: G01N 21/5907 Densitometers
• CPC Class Codes: G01N 2201/065 Integrating spheres

Abstract

A system for disinfecting a fluid, including: a flow cell including one or more inlet ports and one or more outlet ports, wherein the flow cell is configured to communicate a fluid containing a biological contaminant from the one or more inlet ports to the one or more outlet portions through an interior portion thereof; and one or more point radiation sources disposed about the flow cell, wherein the one or more point radiation sources are operable for delivering radiation to the biological contaminant; wherein an interior surface of the flow cell is operable for reflecting the radiation delivered to the biological contaminant by the one or more point radiation sources; and wherein the interior surface of the flow cell is operable for reflecting the radiation delivered to the biological contaminant by the one or more point radiation sources such that a radiation intensity is uniform throughout the interior portion of the flow cell. In one exemplary embodiment, the flow cell is an integrating sphere. Optionally, the system also includes a photocatalyzing material disposed on at least a portion of the interior surface of the flow cell.

Claims

1. A system for disinfecting a fluid, comprising:

a flow cell comprising one or more inlet ports and one or more outlet ports, wherein the flow cell is configured to communicate a fluid from the one or more inlet ports to the one or more outlet ports through an interior portion thereof; and

one or more point radiation sources disposed about the flow cell, wherein the one or more point radiation sources are operable for delivering radiation to the fluid;

wherein an interior surface of the flow cell is operable for reflecting the radiation delivered to the fluid by the one or more point radiation sources;

wherein the flow cell is an integrating cavity comprising curved and concaved opposed interior surfaces;

wherein the one or more point radiation sources are disposed about a periphery of the integrating cavity;

wherein the interior surface is a reflectance material operable for reflecting the radiation delivered to the fluid by the one or more point radiation sources and creating a diffuse source from the radiation such that a radiation intensity is uniform and independent of direction throughout the entire interior portion of the flow cell when the flow cell is filled with a substantially or partially transparent medium and the one or more point radiation sources are small in area as compared to the interior surface area of the flow cell.

2. The system of claim 1, wherein the one or more point radiation sources comprise one or more of one or more semiconductor optical sources, one or more light-emitting diode optical sources, one or more ultraviolet optical sources, and one or more deep-ultraviolet optical sources.

3. The system of claim 1, further comprising one or more mechanical baffles or stirring mechanisms disposed within the interior portion of the flow cell for selectively modifying a flow of the fluid therethrough.

4. The system of claim 3, further comprising a photocatalyzing material disposed on at least a portion of a surface of the one or more mechanical baffles or stirring mechanisms.

5. The system of claim 1, further comprising a photocatalyzing material disposed on at least a portion of the interior surface of the flow cell.

6. The system of claim 1, further comprising a controller operable for selectively activating/deactivating the one or more point radiation sources.

7. The system of claim 1, further comprising a controller operable for selectively controlling the residence time of the fluid in the interior portion of the flow cell.

8. A method for disinfecting a fluid, comprising:

providing a flow cell comprising one or more inlet ports and one or more outlet ports, wherein the flow cell is configured to communicate a fluid from the one or more inlet ports to the one or more outlet ports through an interior portion thereof; and

providing one or more point radiation sources disposed about the flow cell, wherein the one or more point radiation sources are operable for delivering radiation to the fluid;

wherein an interior surface of the flow cell is operable for reflecting the radiation delivered to the fluid by the one or more point radiation sources;

wherein the flow cell is an integrating cavity comprising curved and concaved opposed interior surfaces;

wherein the one or more point radiation sources are disposed about a periphery of the integrating cavity;

wherein the interior surface is a reflectance material operable for reflecting the radiation delivered to the fluid by the one or more point radiation sources and creating a diffuse source from the radiation such that a radiation intensity is uniform and independent of direction throughout the entire interior portion of the flow cell when the flow cell is filled with a substantially or partially transparent medium and the one or more point radiation sources are small in area as compared to the interior surface area of the flow cell.

9. The method of claim 8, wherein the one or more point radiation sources comprise one or more of one or more semiconductor optical sources, one or more light-emitting diode optical sources, one or more ultraviolet optical sources, and one or more deep-ultraviolet optical sources.

10. The method of claim 8, further comprising providing one or more mechanical baffles or stirring mechanisms disposed within the interior portion of the flow cell for selectively modifying a flow of the fluid therethrough.

11. The method of claim 10, further comprising providing a photocatalyzing material disposed on at least a portion of a surface of the one or more mechanical baffles or stirring mechanisms.

12. The method of claim 8, further comprising providing a photocatalyzing material disposed on at least a portion of the interior surface of the flow cell.

13. The method of claim 8, further comprising providing a controller operable for selectively activating/deactivating the one or more point radiation sources.

14. The method of claim 8, further comprising providing a controller operable for selectively controlling the residence time of the fluid in the interior portion of the flow cell.

15. A system for disinfecting a fluid, comprising:

a flow cell comprising one or more inlet ports and one or more outlet ports, wherein the flow cell is configured to communicate a fluid comprising a biological contaminant from the one or more inlet ports to the one or more outlet ports through an interior portion thereof; and

one or more point radiation sources disposed about the flow cell, wherein the one or more point radiation sources are operable for delivering radiation to the biological contaminant;

wherein an interior surface of the flow cell is operable for reflecting the radiation delivered to the biological contaminant by the one or more point radiation sources;

wherein the interior surface of the flow cell is operable for reflecting the radiation delivered to the biological contaminant by the one or more point radiation sources such that a radiation intensity is uniform and independent of direction throughout the interior portion of the flow cell when the flow cell is filled with a substantially or partially transparent medium and the one or more point radiation sources, are small in area as compared to the interior surface area of the flow cell;

wherein the flow cell is an integrating cavity comprising curved and concaved opposed interior surfaces;

wherein the one or more point radiation sources are disposed about a periphery of the integrating cavity;

wherein the interior surface is a reflectance material operable for reflecting the radiation delivered to the fluid by the one or more point radiation sources and creating a diffuse source from the radiation.

16. The system of claim 15, wherein the one or more point radiation sources comprise one or more of one or more semiconductor optical sources, one or more light-emitting diode optical sources, one or more ultraviolet optical sources, and one or more deep-ultraviolet optical sources.

17. The system of claim 15, further comprising a photocatalyzing material disposed on at least a portion of the interior surface of the flow cell.