Pathogen reduction using chloramines

• US 7,387,736 B2
• Filed: 07/11/2003
• Issued: 06/17/2008
• Est. Priority Date: 07/16/2002
• Status: Expired due to Fees

• Current Assignee: Zentox Corporation
• Original Assignee: Zentox Corporation
• Inventors: Phillips, Joe D., Jaffe, Sam M., Kim, Robert P., Axtell, Stephen P.
• Primary Examiner(s): Hruskoci; Peter A.
• Application Number:
  US10/521,310
• Publication Number:
  US 20050211643A1
• Time in Patent Office: 1,803 Days
• Field of Search: 210/754
• US Class Current: 210/752
• CPC Class Codes: A22C 21/0061 Cleaning or disinfecting poultry
• CPC Class Codes: A23B 7/157 Inorganic compounds
• CPC Class Codes: C02F 1/50 by addition or application of a germicide or by oligodynamic treatment C02F1/4606, C02F1/467, C02F1/76 take precedence
• CPC Class Codes: C02F 1/76 with halogens or compounds of halogens C02F1/4674 takes precedence
• CPC Class Codes: C02F 1/78 with ozone C02F1/4672 takes precedence
• CPC Class Codes: C02F 2103/22 from the processing of animals, e.g. poultry, fish, or parts thereof
• CPC Class Codes: C02F 2103/32 from the food or foodstuff industry, e.g. brewery waste waters
• CPC Class Codes: C02F 2303/04 Disinfection

Abstract

A method and apparatus for implementing pathogen reduction within a poultry processing or food processing plant that uses water that has been treated with chloramines at an advantageous dosagebefore being introduced to the production process at processing steps. The water treated with chloramines may be from a fresh water source or reclaimed water from the processing plant. The reintroduction of the treated reclaimed water advantageously causes a dramatic reduction in the levels of microorganisms associated with poultry processing, while substantially conserving water use.

Claims

1. A method for reducing the level of poultry contamination resulting from the processing of poultry, wherein the processing of poultry includes the processing steps of scalding, picking, eviscerating, washing, rinsing and chilling said poultry, the method for reducing the level of poultry contamination comprising the steps of:

adding chloramines as a disinfectant to process water used in at least one processing steps forming a disinfected process water, wherein said chloramines are comprised of a combination of monochloramine and dichloramine in a ratio of about 1;

0 to about 1;

1, and said process water has a desired pH range to control said ratio of monochloramine to dichloramine; and

using said disinfected process water in at least one of said processing steps, thereby reducing the level of contamination of the poultry at each of said processing steps.

2. The method according to claim 1 wherein said chloramines are present within said process water in nominally equimolar concentrations of monochloramine, dichloramine and free chlorine.

3. The method according to claim 1 wherein said process water contains residual monochloramine.

4. A method for processing poultry using a process for disinfecting a recyclable aqueous medium, said process for disinfecting comprising steps of:

recovering at least a portion of aqueous medium from a processing step;

filtering said recovered aqueous medium to remove particulate matter;

disinfecting said aqueous medium with ozone;

introducing chloramines to the filtered water, wherein said chloramines are comprised of a combination of monochloramine and dichloramine in a ratio of about 1;

0 to about 1;

1, and said aqueous medium has a desired pH range to control said ratio of monochloramine to dichloramine; and

reusing said to the recovered, filtered, disinfected and chlorinated aqueous medium in a poultry processing step.

5. The method according to claim 4 wherein said chloramines are present within said aqueous medium in nominally equimolar concentrations of monochloramine, dichloramine and free chlorine.

6. A method for reducing the level of poultry contamination resulting from the processing of poultry, wherein the processing of said poultry includes the steps of scalder, picker, post-pick, washer, rinsing and chilling, the method comprising the steps of:

recovering water used during at least one of said poultry processing steps;

treating said recovered water with chloramines and controlling the pH of said recovered water reducing microorganisms therein, wherein said chloramines are comprised of a combination of monochloramine and dichloramine in a ratio of about 1;

0 to about 1;

1, and said aqueous medium has a desired pH range to control said ratio of monochloramine to dichloramine; and

reintroducing said treated recovered water into at least one processing step which uses heated water, whereby the combination of said treated water and said heated water reduces the level of microorganisms within said poultry.

7. The method according to claim 6 wherein a primary disinfection step of the recovered process water is accomplished by a highly reactive disinfectant before the introduction of chloramines.

8. A method for food processing comprising the use of an aqueous medium said food processing using a process for disinfecting said aqueous medium and food stuff, said process for disinfecting comprising the steps of:

recovering at least a portion of aqueous medium from a processing step;

filtering said recovered aqueous medium to remove particulate matter;

treating said aqueous medium by introduction of chloramines within said aqueous medium, wherein said chloramines are comprised of a combination of monochloramine and dichloramine in a ratio of about 1;

0 to about 1;

1, and said aqueous medium has a desired pH range to control said ratio of monochloramine to dichloramine; and

reusing said filtered, recovered, and treated aqueous medium in a processing step.

9. A method for pathogen reduction in food stuffs within food product processing comprising the steps of:

providing an aqueous medium that comes in contact with food stuffs;

treating said aqueous medium by the introduction of chloramines, wherein said chloramines reduce pathogens within foodstuffs, and wherein said chloramines are comprised of a combination of monochloramine and dichloramine in a ratio of about 1;

0 to about 1;

1, and said aqueous medium has a desired pH range to control said ratio of monochloramine to dichloramine.