System and method for processing waste material

• US 8,652,404 B2
• Filed: 04/09/2013
• Issued: 02/18/2014
• Est. Priority Date: 05/01/2010
• Status: Active Grant

• Current Assignee: Red Bag Solutions
• Original Assignee: Red Bag Solutions
• Inventors: Norton, William D., Glazer, Sanford
• Primary Examiner(s): CONLEY, SEAN EVERETT
• Application Number:
  US13/859,148
• Publication Number:
  US 20130224072A1
• Time in Patent Office: 315 Days
• Field of Search: 422/22, 422/292, 422/28
• US Class Current: 422/28
• CPC Class Codes: A61L 11/00 Methods specially adapted for refuse disintegrating medical waste B02C19/0075; disposal of medical waste B09B3/00
• CPC Class Codes: A61L 2/183 Ozone dissolved in a liquid
• CPC Class Codes: A61L 2/202 Ozone
• CPC Class Codes: B02C 18/0092 for waste water or for garbage
• CPC Class Codes: B02C 19/0075 specially adapted for disintegrating medical waste sterilisation of refuse A61L11/00; disposal of medical waste B09B3/00

Abstract

A system for ozone sterilization of waste material, includes a tank configured to receive waste material, ozonated water, and ozone gas. The system further includes a pump coupled to the tank to receive the waste material and the ozonated water from the tank and form a slurry. The pump includes a cutter assembly to reduce a particle size of the slurry through cutting. Additionally, the system includes a circulation loop coupled between the tank and the pump to receive the slurry from the pump and re-circulate the slurry to the tank until the slurry is sterilized. A method for ozone sterilization of waste material is also disclosed.

Claims

1. A method for ozone sterilization of waste material, comprising the steps of:

providing a tank including a top surface, a bottom surface and a substantially cylindrical side wall that define a substantially hollow chamber, wherein the tank includes a first inlet, a second inlet, a third inlet, and an outlet, wherein the first, second and third inlets are positioned within the substantially cylindrical side wall and the outlet is positioned within the bottom surface

receiving the waste material in the tank via the first inlet;

receiving ozonated liquid and ozone gas in the tank via the second inlet;

mixing the waste material and the ozonated liquid within the tank to produce a slurry;

pumping the slurry out of the tank via the outlet and into a pump;

cutting the slurry into reduced sized particles in the pump;

continuously re-circulating the slurry from the pump to the tank via the third inlet until the slurry is sterilized;

guiding the slurry from the third inlet along the bottom surface of the tank to the outlet after re-circulation via a deflector plate positioned on the bottom surface of the tank at an angle and height to allow recirculation, and recirculating for the circumference of the tank wall via positioning of the third inlet behind the deflector plate with respect to the outlet at a predetermined height and position; and

filtering the sterilized slurry.

2. The method of claim 1, wherein the slurry continues to be sterilized and cut up during re-circulation.

3. The method of claim 2, wherein filtering the sterilized slurry includes separating a liquid portion of disposable waste material and a solid portion of disposable waste material.

4. The method of claim 2, wherein the step of chopping includes three stages of cutting the slurry using a cutter cartridge device comprising a cutter, a cutter bar plate and an impeller having cutting surfaces in a stacked formation.