Wash Water Sanitizers and their Measurement Verification of Validation. Presented by: Karan Khurana Pulse Instruments

Transcription

1 Wash Water Sanitizers and their Measurement Verification of Validation Presented by: Karan Khurana Pulse Instruments

2 Irrigation, Pre Cooling & Packing

3 Process Applications

4 Process Stability Specification: As per Validation Criteria Control Point: When to take action Credit: Trevor Suslow; UC Davis

5 Process Variables Sanitizer Choice Equipment Design Temperature Type of Product Commodity Organic Load, Turbidity and COD Levels Throughput Rate Operator Variation Calibration and Maintenance

6 Romaine Wash Line

7 Spinach Wash

8 Celery Water Cuts

9 Sanitizer Options Chlorination Form Hypochlorous Acid (HOCl) Chlorine Gas Sodium Hypochlorite Calcium Hypochlorite Chlorine Dioxide Peroxyacetic Acid Acid Surfactant Ozone

10 ph Effects on Chlorine ph Management is essential to effective Chlorine treatment

11 ORP Measures Effectiveness Oxidation is a Transfer of Electrons Microbes lose electrons and are oxidized Oxidizer disrupts the cell function and integrity

12 E. Coli Kill Time ORP Kill Time 450 mv Infinite 500 mv 1 hour 550 mv 100 seconds 600 mv 10 seconds 650 mv 0 seconds

13 ppm Readings vs. ph ORP

14 Biofilms John Lennox, 2008 (

15 Biofilm Sanitizer Treatment Treatment of Biofilms with chlorine results in poor penetration

16 Chlorine cannot penetrate Biofilm

17 Hydrogen Peroxide cannot penetrate Biofilm bulk Bulk fluid base of biofilm Base of biofilm Hydrogen Peroxide Concentration Conc. (mm) (mm) Stewart et al (2000) Appl. Environ. Microbiol. 66:836. (sec) Time (seconds)

18 Treatment with 50 mg/l Quat 60 min

19 Treatment with 50 mg/l Nisin 60 min

20 Treatment with 50 mg/l Chlorine 60 min

21 Treatment with 10 mg/l Chlorine Dioxide 60 min

22 Chlorine Harmful Byproducts Tri Halo Methane (THMs) Chlorine, Bromine, Iodine

23 Oxidizer Potential Oxidation Strength describes the strength of the reaction and reactivity. A higher number means it reacts with more things. Oxidizer Oxidation Strength Oxidation Capacity Ozone (O 3 ) e - POAA (Peroxy Acetic Acid) e - Hydrogen Peroxide (H 2 O 2 ) e - Hypochlorous Acid (HOCl) e - Hypobromous Acid (HOBr) e - Chlorine Dioxide (ClO 2 ) e -

24 Chlorine Dioxide ClO 2 Oxidizer 2.5x more effective than Chlorine 10x more soluble in water than chlorine Low Sodium, Low Chlorite No hydrophilic substitution reactions Does not form THMs Does not form Chloramines Effective at wide ph ranges

25 o Powerful oxidizing gas Ozone (O 3 ) Advantages o Broad spectrum antimicrobial activity

26 H 2 O 2 Peroxyacetic Compounds + CH 2 COOH H 3 COOH Hydrogen Acetic Peroxyacetic Peroxide Acid Acid Broad Spectrum Anti Microbial Tolerant to organic matter Low Foam Combine sanitizing and acid rinse No residue & Environmentally responsible Less corrosive than chlorine to stainless steel

27 Oxcide Electro Chemically Activated (ECA) Solution Electrochemical conversion of brine solution Complex ionic mixtures of: Oxy Chloro Compounds Hypochlorous & Hypochlorite Chlorine Dioxide (ClO 2 ) Peroxide Compounds hydroxyl radical (HO ) peroxide anion (HO 2 ) superoxydeanion O 2 ozone O 3

28 Product Specific Sanitizer Demand Product Demand Turbidity (NTU) Chopped Onions 50% 20 Salad Mix/Carrots 41% 36 Shred Lettuce 35% 108 Spinach Line 35% 39 Spinach Tank 1 31% 59 Romaine 26% 2 Broccoli/Slaw 25% 82 Red Cabbage 24% 81 Broccoli 20% 23 Cauliflower 18% 3 Spinach Tank 2 15% 8 Spinach Tank 3 9% 1

29 Automation System Free Chlorine Chlorine Dioxide POAA, Ozone ph, ORP, Temperature Conductivity or Turbidity Chemical Level Inventory Chemical Injection Pumps Chemical Injection Verification Data Recording and Reporting Built in Alarm

30 Free Chlorine Measurement Electrode for Free Chlorine, Chlorine Dioxide POAA or Ozone Potentiostatic and Amperometric

31 ORP Measurement Unique ORP Electrode Platinum Element Built in Amplifier & Ground Cartridge Design with a Fast Response

32 ph Measurement Unique Design Non Glass Isfet ph Electrode Transistor Chip Non Clogging Amplified Automatic Temperature Compensation

33 Conductivity Measurement Electrodeless Conductivity Non Coating suited for water with organic load Automatic temperature Compensation Low Maintenance Fast Response

34 Simple Chemical Injection

35 Chemical Automation

36 Inventory Management

37 Data Charts & Graph Reports

38 Chemical Injection Verification Waterproof Chemical Injection Pumps IP67 Positive Displacement verification When Chemical pump is running, the verification sensor ensures chemical was injected Injection verification feedback to alarm

39 Alarm Notification Local Audio Visual Alarm Remote Audio Visual Alarm to multiple addresses SMS Text Message to Cell Phone Sequential dial to multiple phones Website Alarm

40 Data Recording & Management Communications Process Monitoring Real Time Access Data Recording and Reports Data Management

41 Alarm Notification o Local Audio Visual Alarm o Remote Audio Visual Alarm o to multiple addresses o SMS Text Message to Cell Phone o Sequential dial to multiple phones o Website Alarm

42

43 Secondary Validation Test Strips Digital ppm Colorimeter Digital ORP, ph, ppm, Temp

44 Treatment Conclusions Identify the Water Process Identify your Wash Product Select your Chemistry Select a Spot Check Device Select Monitoring System Select Recording Method Maintain Records!!!!

45 Wash Water Sanitation and Validation January 22,