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NWFPA Choosing a Sanitizer Donald Jones djones@aquaphoenixsci.com

NWFPA Choosing a Sanitizer Donald Jones djones@aquaphoenixsci.com. What is Cleaning?. T he Removal of Soil Particles from Surfaces by Mechanical, Manual, or Chemical Methods. What is Sanitizing?.

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NWFPA Choosing a Sanitizer Donald Jones djones@aquaphoenixsci.com

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  1. NWFPA Choosing a Sanitizer Donald Jones djones@aquaphoenixsci.com

  2. What is Cleaning? • The Removal of Soil Particles from Surfaces by Mechanical, Manual, or Chemical Methods.

  3. What is Sanitizing? The Treatment of a CleanedSurface with a Chemical or Physical Agent to Destroy Disease / Spoilage Causing Organisms. Reduces Total Vegetative Cell Population to a “Safe Level”.

  4. Sanitizing You Cannot Sanitize a Dirty Surface.

  5. Types of Sanitizers • Heat • Chlorine • Chlorine Dioxide • Iodine • Peroxyacetic Acid • Acid Sanitizers • Quats

  6. Heat • Hot Water is Used at 170° F for a Minimum of 5 Minutes. • Steam May be Used if the Outlet Temperature is a Minimum of 200° F for 5 Minutes. • NOTE: All Equipment Must Reach Minimum Times and Temperatures.

  7. Chlorine Hypochlorous Acid

  8. Chlorine • Made From a Combination of NaOH and Chlorine Gas. • Forms OCl ( Hypochlorite Ion ) in Alkaline Solutions. • Forms HOCl ( Hypochlorous Acid ) in Neutral to Acidic Solutions. • Both Kill, HOCl is 80X More Effective.

  9. Ratios of HOCl-OCl at Various pH’s

  10. Advantages: Broad Spectrum Kills Spores and Phage Liquids or Powders OK in Hard Water Inexpensive Disadvantages: Corrosive Irritating to Skin Very pH Sensitive Sensitive to Organics Keep Below 120° F. Chlorine

  11. Chlorine Dioxide Cl O O

  12. Chlorine Dioxide • More Effective than “Regular” Chlorine. • Chlorine has 2 Electron Receivers, Chlorine Dioxidehas Five. 2 ½ more Oxidizing Power. • Used at Very Low Concentrations. (.5 to 5 ppm) • Generated On-Site. • Excellent for Water Treatment. • ClO2

  13. Advantages: Broad Spectrum Kills Spores / Phages OK in Hard Water Very Economical Safe for Environment Wide pH Range No THM’s (Trihalomethanes) Bio-film Removal Tolerate High Organic Load Low Organoleptic Impact Disadvantages: May Gas-Off On-Site Generators Needs Special Training Must Follow Directions Chlorine Dioxide

  14. Iodophors

  15. Iodine • Very Successful Since the 1940s. • Similar to Chlorine in Killing Microbes. • Surfactant + Iodine = Iodophore • Used at Very Low Concentrations.

  16. Advantages: Broad Spectrum Color Coded Non-Irritating Manual Use Stable Solutions CIP Use Economical Disadvantages: pH Sensitive Use Under 120° F Odor Corrosive if Abused Iodine

  17. Acid Sanitizers

  18. Acid Sanitizers • Combinations of Acids and Surfactants or Fatty Acids. • They Kill by Shutting Down the Cell Membrane. • Many Different Types. • Used Since 1954.

  19. Advantages: Broad Spectrum High Anti-microbial Against G- Organic Tolerant Acid Rinse Stable Solutions Non-Corrosive to SS OK in Hard Water CIP, and Manual Use Wide Temperature Range Disadvantages: pH Sensitive Some Foam in CIP Variable Phage Kill Contains Phosphate Slower Than Cl or I2 Corrosive to Soft Metals Acid Sanitizers

  20. Peracetic Acid

  21. Peroxyacetic Acid • Combination of Acetic Acid and H2O2. • Used World Wide Since Around 1902. • Used in U.S. Since mid-80s. • Kills by Oxidation

  22. Advantages: Broad Spectrum No Foam Environmentally Safe Good on Bio-films Stable Solutions Wide pH Range Disadvantages: Strong Oxidizer Pungent Odor Not an Acid Rinse Special Training Needed Limited Manual Use Peroxyacetic Acid

  23. Quaternary Ammonium Compounds

  24. Quats • Combination of Cationic Surfactants and Water. • Many Varied Formulas. • Used for Over 50 Years. • Kill by Shutting Down the Cell Membrane. • Usually Product of Choice for Environmental Sanitizing

  25. Advantages: Low Toxicity Non-Irritating Non-Corrosive Heat/Organic Stable High Activity for G+ Yeast/Mold Control Residual Non-Volatile Can be Acidified Disadvantages: Low Activity for G- Anionic Contamination Reduces Activity Residual Foam in CIP Quats

  26. Hydrogen Peroxide

  27. Hydrogen Peroxide • Strong Oxidizing Agents • Strong Bactericide • Ability to Make Environment Unsuitable for Organism Growth • Exercise Extreme Care in Handling Hydrogen Peroxide. • Strong Oxidizing Agent • Potentially Explosive

  28. Test – Test - Test

  29. Know the Effect on ATP

  30. Comparing PropertiesofCommon Sanitizers

  31. Sanitizers of Interest • Chlorine Sanitizer • ClO2 Sanitizer • Iodine Sanitizer • Quat Sanitizers • Acid Sanitizers • PAA Sanitizer Na O Cl CH3 CH3 CH3 CH CH2 CH CH CH2 CH2 O (CH2CH2O)9 CH3 R1 N CH3 CH2 C2H5 CH3(CH2)4CH(CH2)6CH3 O CH3 C O OH SO3

  32. Microbial Specificity

  33. Germicidal Speed Slowest Fastest

  34. Effective pH Range 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

  35. pH Considerations • What is the pH of your Water? • Acid Sanitizer: Phosphoric Acid 50% Use Ratio: 1 to 6 • Acid Sanitizer: Phosphoric Acid 30% Use Ratio: 1 to 10

  36. Use Cost Relative to Chlorine

  37. Corrosion Potential At use dilution - based on a scale of 1 to 10

  38. Stability - Under Ideal Conditions

  39. Foaming Potential Foam levels at “no rinse” use dilutions.

  40. Environmental Impact On a scale of 1 to 10 - 10 having the greatest impact.

  41. Thank You

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