Micro-organism reduction in liquid by use of a metal halide ultraviolet lamp
OwnerRobert Duthieinventor
Life of this patent
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Abstract
A method and apparatus for disinfection/pasteurization of fluids. There is provided a mercury/gallium metal halide ultraviolet lamp enclosed within an ozone free metallic doped quartz envelope, an ozone free, metallic doped quartz enclosure for the lamp, an in-line stationary spiral or internal thread of single or multiple leads surrounding the enclosure, and a containment vessel having an inlet, an outlet and a chamber in fluid communication therewith defining a flow path for fluid to be disinfected/pasteurized. The lamp is operated at a wavelength range from about 100 nanometers to about 400 nanometers to introduce multiband ultraviolet radiation and minimal heat into the fluid with the enclosure preventing build up of ozone.
Claims32
Apparatus for disinfection/pasteurization of fluids comprising:
- a) a mercury/gallium metal halide ultraviolet lamp enclosed within an ozone free metallic doped quartz envelope;
- b) an ozone free, metallic doped quartz enclosure for the lamp;
- and
- c) a vessel containing the lamp in an enclosure and an in-line stationary spiral lead surrounding the enclosure and the vessel having an inlet, an outlet and a chamber in fluid communication therewith defining a flow path for fluid to be disinfected/pasteurized.
Apparatus for disinfection/pasteurization of fluids comprising:
- a) a mercury/gallium metal halide ultraviolet lamp enclosed within an ozone free metallic doped quartz envelope, the lamp providing ultraviolet radiation having wavelength bands designated UV-A, UV-B and UV-C wherein band UV-A has a wavelength from about 315 nanometers to about 400 nanometers, band UV-B has a wavelength from about 280 nanometers to about 315 nanometers and band UV-C has a wavelength from about 100 nanometers to about 280 nanometers;
- b) an ozone free, metallic doped quartz enclosure for the lamp;
- and
- c) a vessel containing the lamp and enclosure and having an inlet, an outlet and a chamber in fluid communication therewith defining a flow path for fluid to be disinfected/pasteurized.
A method for disinfection/pasteurization of fluids comprising:
- a) providing a mercury/gallium metal halide ultraviolet lamp enclosed within an ozone free metallic doped quartz envelope;
- b) providing an ozone free, metallic doped quartz enclosure for the lamp;
- c) providing a vessel containing the lamp, enclosure and an in-line stationary spiral lead surrounding the enclosure, the vessel having an inlet, an outlet and a chamber in fluid communication therewith defining a flow path for fluid to be disinfected/pasteurized;
- and
- d) operating the lamp to introduce ultraviolet radiation and heat from the lamp into the fluid with the enclosure preventing build up of ozone.
A method for disinfection/pasteurization of fluids comprising:
- a) providing a mercury/gallium metal halide ultraviolet lamp enclosed within an ozone free metallic doped quartz envelope;
- b) providing an ozone free, metallic doped quartz enclosure for the lamp;
- c) providing a vessel containing the lamp and enclosure and having an inlet, an outlet and a chamber in fluid communication therewith defining a flow path for fluid to be disinfected/pasteurized;
- and
- d) operating the lamp to introduce ultraviolet radiation and heat from the lamp into the fluid with the enclosure preventing build up of ozone, the lamp being operated to provide ultraviolet radiation having wavelength bands designated UV-A, UV-B and UV-C wherein band UV-A has a wavelength from about 315 nanometers to about 400 nanometers, band UV-B has a wavelength from about 280 nanometers to about 315 nanometers and band UV-C has a wavelength from about 100 nanometers to about 280 nanometers.
Fluid pasteurization apparatus comprising:
- a) a tank having an inlet and an outlet;
- b) a mercury/gallium metal halide ultraviolet lamp located within the tank, the lamp being enclosed within an ozone free, metallic doped quartz enclosure;
- and
- c) at least one mixing device within the tank for causing fluid to be pasteurized to flow around the lamp.
A fluid pasteurization method comprising:
- a) providing a tank;
- b) placing within the tank a mercury/gallium metal halide ultraviolet lamp being enclosed within an ozone free, metallic doped quartz enclosure;
- c) introducing fluid to be pasteurized into the tank so that the lamp is immersed in the fluid;
- and
- d) mixing the fluid to cause it to flow around the lamp while the lamp emits ultraviolet radiation.
Dependencies are inferred from the claim text.