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Food Microbiology > Cleaning and Sanitation > Flashcards

Cleaning and Sanitation Flashcards

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1
Q

What is the management responsible for?

A

EVERYTHING.

Selection of cleaning and sanitation chemicals, training, cleaning schedules and monitoring.

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2
Q

What is cleaning vs sanitation?

A

Cleaning is removing visible debris, while sanitation is reduction of microbial load.

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3
Q

What are 5 steps for cleaning and sanitation?

A
  1. Remove gross soils
  2. Chemical agents to remove visible soil residues that are stuck on.
  3. Rinse of soil and cleaning agent!!
  4. CHemical agents for sanitation, removie kill and inhibit remaining microorganisms.
  5. Rinse off sanizer.
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4
Q

What are a few thing you need to do in a sanitation PRP?

A

inspect for effectiveness of cleaning, and indicate the temperature, concentration and contact time of sanitizer.

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5
Q

Three cleanliness, what are they?

A

Physical, chemical and microbial cleanliness.

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6
Q

Cleaning steps. What are they?

A
  1. Dry cleaning. Get rid of pieces (no chemical)
  2. Wetting and scrubbing with soap/ detergent.
  3. Rinse.
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7
Q

What are the types of soils aka dirts?

A
  1. Dirt- unwanted matter on the surface of an object.
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8
Q

How is protein clean up?

A

alkaline

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9
Q

milkstone what is it?

A

minerals + organic molecules

partially soluble by acids

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10
Q

How to clean grease and oils?

A

hot water or stam and surfactants

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11
Q

What about insolubles like sand and clay?

A

rarely attach to surface so just use water. duh.

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12
Q

What is the target to clean and disadvantage of using NaOH, alkaline, Na3PO4, and soaps?

A

FAT and protein, disadvantage is corode Aluminum, no effect on acid salts, and soaps form ppt in hard water.

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13
Q

What is acid dtergents used for? disadvantage?

A

mineral deposits. corrosive to metals tho!

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14
Q

What are enzyme such as proteinases and lipasese used for?

A

fat and preotein. NO effect on mineral deposits and it’s expensive.

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15
Q

Sugar and starch use?

A

milk alkaline degerget.

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16
Q

proteins?

A

proteases aka alkaline detergent

17
Q

Fat?

A

lipase mild or strong alkaline detergent.

18
Q

Minteral deposits

A

acid!

19
Q

REMEMBER SURFACES MUST BE…

A

CLEAN BEFORE SANITATION

20
Q

Chlorine sanitizer. A bit about it..

A

CL2, HOCl ect..

21
Q

What concentration do you use for chlorine?

A

5-100ppm.

22
Q

What is cholorine effective against?

A

microorganisms, but limited effect against spores.

23
Q

What is a downer about chlorine?

A

Consume by organic matter..therefore if not clean properly before it’s ineffective.
- Causes corrosion of rubber, concrete, iron and steel at pH <5

24
Q

Iodine sanitizer..what is the active molecule?

A

I2

25
Q

What is the maximum activity at what ph?

A

3

26
Q

What is the benefits and downers of iodine?

A
  • Less irritation than chlorine, and less rxn with soils.
    HOWEVER…
  • stains some plastics and starchy foods, no effect at neutral pH, and unstable at >50C
27
Q

QUATS? Quaternary Ammonia Compounds what is benifits and negatives?

A

Selective activity
- gram - less affected.
Pseudomonas is reistant to QUATS
no residue, heat stable, wide pH range, non-crossive, no taste/ odor, and less affectedby organic matter.

28
Q

Acid sanitizers. what pH do they work good in?

A

pH < 2.5

29
Q

What is the benefits and disadvantages of acids?

A

undissociated organic acids. High cost/ corrosive. but very effective. heat stable, non-selective, and low toxicity.

30
Q

If you want to kill spores what will you use?

A

acids!

31
Q

For monitoring cleanilness what is acceptable?

A

Less than 10^3CFU/ 10cm2 in sensitive operations.

32
Q

How can you determine how much microorganisms are still present on the counter?

A

Use ATP- determination.

- not a good correlation to viable cells but uses bioluminescence to identiyf amount of ATP present.

33
Q

Personal hygiene PP some are?

A

hair net, protective equiptment, hands washed,

34
Q

How to wash your hands..

A
  1. Turn on tamp until reach a comfortable temp (43-49C),
  2. wet hands
  3. Apply 5ml of soap
  4. Using a brush scrub fingers for 26sec
  5. Rinse hands,
  6. apply more 5ml soap, wash (no scrub)
  7. Rinse
  8. Dry with paper towel
  9. Dipose of towl in trash
  10. return to work.
35
Q

What are populat agents used for handwashing?

A 
alcohol, (doesn't kill virus)
iodohphor stains skin
Chlorhexidine gluconate
4% effective, expensive. 
wash then sanitize.

Food Microbiology (13 decks)

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