MICR-4070 Lecture Notes - Lecture 20: Peroxy Acid, Ammonium Chloride, Macrophage
23 Mar 2018
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Micr 4070: food and dairy microbiology: test 2 (lecture 11, food sanitation) No-rinse food contact surface sanitizer: reduce staphylococcus aureus and escherichia coli by 99. 9999% or 5 logs in 30 seconds at 25 c. You don"t rinse these sanitizers off because the water may not be sterile. Non-food contact surface sanitizer: reduce above microorganisms by 99. 9% or 3 logs in 5 min at 25 c, use these on walls and floor of a processing plant. Thermal sanitizing methods: steam- convenient, no residues left behind, and has a great penetration ability. Problem: it can condense and be expensive: hot water. Radiation sanitizing methods: uv light, high-energy cathode. Good method because they can be turned on and off: gamma rays. Monday, march 12, 2018: chemicals are the most used and they are inexpensive. Need to think about if the chemical is a broad range sanitizer or if its resistant to the environment. Chlorine gas (most widely used: sodium, calcium, and lithium hypochlorites.
