Food processing effluent refurbishing system and method

• US 7,638,067 B2
• Filed: 01/19/2006
• Issued: 12/29/2009
• Est. Priority Date: 01/19/2006
• Status: Active Grant

• Current Assignee: Ecolab USA Incorporated (Ecolab, Inc.)
• Original Assignee: Ecolab, Inc.
• Inventors: Tippett, Roger J., Hilgren, John D., Burnett, Scott L.
• Primary Examiner(s): Griffin; Walter D
• Assistant Examiner(s): Allen; Cameron J
• Application Number:
  US11/335,232
• Publication Number:
  US 20070163966A1
• Time in Patent Office: 1,440 Days
• Field of Search: 210/748, 210/746, 210/600, 210/202, 210/742, 210/791, 210/85, 210/103, 210/195.1, 210/259, 210/908, 426/321, 119/75
• US Class Current: 210/748.13
• CPC Class Codes: C02F 1/004 using large scale industrial sized filters
• CPC Class Codes: C02F 1/32 with ultraviolet light
• CPC Class Codes: C02F 1/722 Oxidation by peroxides
• CPC Class Codes: C02F 1/766 by means of halogens other than chlorine or of halogenated compounds containing halogen other than chlorine
• CPC Class Codes: C02F 1/78 with ozone C02F1/4672 takes precedence
• CPC Class Codes: C02F 2209/01 Density
• CPC Class Codes: C02F 2303/04 Disinfection

Abstract

A food processing effluent refurbishing system of the present invention refurbishes effluent water in a first and a second food processing loop. The system includes first and second circulation systems, first and second balance tanks, and a side stream. The first circulation system circulates water through the first food processing loop. The first balance tank connected to the first circulation system refurbishes effluent water circulating through the first food processing loop. The second circulation system circulates water through the second food processing loop. The second balance tank connected to the second circulation system refurbishes effluent water circulating through the second food processing loop. The side stream connects the first and second circulation systems.

Claims

1. A system for refurbishing effluent water used in a first food processing loop and a second food processing loop, the system comprising:

(a) a first circulation system circulating water through the first food processing loop;

(b) a first balance tank connected to the first circulation system for refurbishing effluent water circulating through the first food processing loop;

(c) a second circulation system circulating water through the second food processing loop;

(d) a second balance tank connected to the second circulation system for refurbishing effluent water circulating through the second food processing loop; and

(e) a side stream connecting the first and second circulation systems.

2. The system of claim 1, wherein the first and second food processing loops each comprise a filtration assembly for removing suspended solids from the effluent water in each of the circulation systems.

3. The system of claim 1, wherein the first and second balance tanks each comprise influent assemblies for injecting fresh water and at least one disinfecting chemical.

4. The system of claim 3, wherein the chemical comprises a biocide selected from the group consisting of peroxygen compounds, ozone, chlorine dioxide, acidified sodium chlorite, chlorine, chlorine releasing agents, bromine releasing agents, quaternary ammonium compounds, cetylpyridinium chloride, organic acids, or mixtures thereof.

5. The system of claim 4, wherein the peroxygen compounds are selected from the group consisting of peroxyacetic acid, peroxyoctanoic acid, peroxyformic acid, peroxypropionic acid, peroxyheptanoic acid, peroxybenzoic acid, peroxynonanoic acid, monoperglutaric acid, diperglutaric acid, succinylperoxide, hydrogen peroxide, and mixtures thereof.

6. The system of claim 1, and further comprising a sensor for measuring a parameter of the effluent water, wherein the parameter is selected from the group consisting of conductivity, turbidity, color, density, impedance, biological markers, and mixtures thereof.

7. The system of claim 1, and further comprising a sensor for measuring a rate of food product passing through a step of the first or second food processing loops.

8. The system of claim 1, and further comprising an ultraviolet irradiation assembly for irradiating effluent water.

9. A food processing effluent refurbishing system for refurbishing effluent water to a plurality of food processing loops, the system comprising:

(a) a plurality of circulation systems circulating water through the plurality of food processing loops;

(b) balance tanks connected to the plurality of circulation systems for refurbishing effluent water circulating through the plurality of food processing loops; and

(c) side streams connecting the plurality of circulation systems.

10. The system of claim 9, wherein the plurality of balance tanks each comprises a sensor for measuring a parameter of the effluent water.

11. The system of claim 10, wherein each of the sensors control injection of antimicrobial solution into the effluent water based on a food processing production rate of the effluent water.

12. The system of claim 9, wherein the balance tanks are connected to receive antimicrobial solution.

13. The system of claim 9, wherein the antimicrobial solution comprises a biocide selected from the group consisting of peroxygen compounds, ozone, chlorine dioxide, acidified sodium chlorite, chlorine, chlorine releasing agents, bromine releasing agents, quaternary ammonium compounds, cetylpyridinium chloride, organic acids, or mixtures thereof.

14. The system of claim 9, and further comprising a filtration assembly connected to each of the plurality of food processing loops for removing suspended solids from the effluent water.

15. The system of claim 9, wherein each of the balance tanks are sized to provide an effluent water holding time necessary to complete effluent water refurbishing.

16. A method of refurbishing effluent water in a first and a second food processing system, the method comprising:

(a) circulating water through the first food processing systems and the second food processing system;

(b) adding antimicrobial solution to the first food processing system sufficient to refurbish the effluent water;

(c) diverting water from the first food processing system to a side stream connecting the first and the second food processing systems; and

(d) introducing water from the side stream into the second food processing system.

17. The method of claim 16, wherein adding antimicrobial solution comprises a sensing a parameter of the effluent water and controlling the introduction of antimicrobial solution based on the sensed parameter.

18. The method of claim 16, wherein circulating water through the first and second food processing systems includes filtering the water.

19. The method of claim 16, wherein adding antimicrobial solution comprises adding a biocide selected from the group consisting of peroxygen compounds, ozone, chlorine dioxide, acidified sodium chlorite, chlorine, chlorine releasing agents, bromine releasing agents, quaternary ammonium compounds, cetylpyridinium chloride, organic acids, or mixtures thereof.

20. The method of claim 16, and further comprising irradiating the effluent water with ultraviolet light.