Podcast
Questions and Answers
What does cleaning do?
What does cleaning do?
Removes soils, dust, and dirt/waste.
What is the role of disinfection?
What is the role of disinfection?
Reduces the number of potentially harmful microorganisms to a safe level.
What are the types of sanitization?
What are the types of sanitization?
- Heat sanitizing (correct)
- Sterilization
- Disinfection
- Chemical sanitizing (correct)
Sterilization destroys all forms of microbial life.
Sterilization destroys all forms of microbial life.
Which factor does NOT influence the cleaning process?
Which factor does NOT influence the cleaning process?
Penetration reduces surface tension and makes ______ possible.
Penetration reduces surface tension and makes ______ possible.
What do solvent cleaners typically treat?
What do solvent cleaners typically treat?
What is an example of a redox agent in chemical disinfectants?
What is an example of a redox agent in chemical disinfectants?
What characteristic do nitrogen compounds have as disinfectants?
What characteristic do nitrogen compounds have as disinfectants?
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Study Notes
Cleaning
- Removes soil, dust, and dirt/waste.
- Does not kill germs, but lowers the risk of spreading infection.
Disinfection
- Done after soils/dirt have been removed using chemicals.
- Reduces the number of harmful microorganisms to a safe level.
- Uses strong chemicals that kill nearly 100% of germs on surfaces or objects.
Sanitization
- Lowers the number of germs on a surface to a safe level.
- Types of Sanitization:
Heat Sanitizing
- Exposes a clean surface to high heat (71°C - 82°C)
Chemical Sanitizing
- Immersed in a solution, sprayed, or rinsed
Sterilization
- Destroys all forms of microbial life.
- Done through killing all forms of microorganisms and their spores.
- Typically uses heat, irradiation, high pressure, or other methods.
Factors Influencing Cleaning Process
- Type of Water: Minerals in hard water reduce detergent effectiveness.
- Water Temperature: Higher temperatures lead to more efficient cleaning.
- Surface: Metal, glass, wood, plastic, cement
- Type of Cleaning Compound: Some cleaners, like soap, can leave a greasy film.
- Type of soil to be removed: Protein, oils, grease, or water-soluble substances.
Basic Factors & Phases of Detergency
- Penetration: Wetting reduces surface tension and enables penetration
- Suspension:
Saponification
- Turns fats into soap by reaction with alkali.
Sequestering
- Isolates substances, such as chemical ions, so they cannot react.
- Rinsing: Removes and flushes away soils and cleaners.
Type of Cleaners
- Solvent Cleaners: Alkaline-based and used for surfaces soiled with grease.
- Acid Cleaners: Treat lime build-up and rust.
- Abrasives: Used on tough soils that do not respond to solvents or acids.
Types of Chemical Disinfectants (Industry)
Redox Agent
- Inactive M/O
- Leaves no residue
- Highly sensitive to dirt.
- Example: Chlorine, ozone
Nitrogen Compounds
- Slowly inactives M/O
- Leaves residues
- Less sensitive to dirt.
- Example: Quaternary Ammonium Compounds
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