Gerald L Watkins

US Patent:

54338662, Jul 18, 1995

Filed:

Mar 18, 1994

Appl. No.:

8/210706

Inventors:

Jeffrey E. Hoppe - La Mesa CA
Gerald O. Watkins - La Mesa CA

International Classification:

C02F 132
C02F 178

US Classification:

210748

Abstract:

A method for treating wastewater and for purifying and disinfecting drinking water. The treatment includes the addition of pressurized ozonated air to the pumped raw water stream by use of a venturi injector and then achieving well-mixed ozonated water by an in-line static mixer. This promotes the ozone reaction with pollutants in the raw water. The stream is then injected into the ultraviolet (UV) reaction chamber by a static impinger in the form of a conical spray nozzle. This breaks up the stream into a fine mist of one-micron diameter droplets falling down through the chamber. Air released from the droplets is suitably vented to keep the chamber pressure near atmospheric. At a lower plane in the chamber, a UV light source in the form of a uniform grid of essentially coplanar UV lamps irradiates the falling droplets to kill bacteria and viruses and also to catalyze the still ongoing ozone reaction. In the bottom of the chamber, the now treated water forms a pool which is pumped out through filters to its final point of use. A low residence time of two minutes results from optimum process criteria and chamber geometry.

US Patent:

54945763, Feb 27, 1996

Filed:

Apr 27, 1995

Appl. No.:

8/429823

Inventors:

Jeffrey E. Hoppe - El Cajon CA
Gerald O. Watkins - El Cajon CA

Assignee:

Pollution Management Industries - El Cajon CA

International Classification:

C02F 132
C02F 178

US Classification:

2101981

Abstract:

This invention is a method and system for treating wastewater and for purifying and disinfecting drinking water. The treatment includes the addition of pressurized ozonated air to the pumped raw water stream by use of a venturi injector and then achieving well-mixed ozonated water by an in-line static mixer. This promotes the ozone reaction with pollutants in the raw water. The stream is then injected into the ultraviolet (UV) reaction chamber by a static impinger in the form of a conical spray nozzle. This breaks up the stream into a fine mist of one-micron diameter droplets falling down through the chamber. Air released from the droplets is suitably vented to keep the chamber pressure near atmospheric. At a lower plane in the chamber, a UV light source in the form of a uniform grid of essentially coplanar UV lamps irradiates the falling droplets to kill bacteria and viruses and also to catalyze the still ongoing ozone reaction. In the bottom of the chamber, the now treated water forms a pool which is pumped out through filters to its final point of use.