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FERMENTATION Selected slides FT 5105 Food Microbiology

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Page 1: FERMENTATION Selected slides - pgia.ac.lk · Alcoholic Fermentation Alcoholic fermentation of glucose C 6 H 12 O 6 → 2 C 2 H 5 OH + 2 CO 2 glucose ethanol carbon dioxide

FERMENTATIONSelected slides

FT 5105 Food Microbiology

Page 2: FERMENTATION Selected slides - pgia.ac.lk · Alcoholic Fermentation Alcoholic fermentation of glucose C 6 H 12 O 6 → 2 C 2 H 5 OH + 2 CO 2 glucose ethanol carbon dioxide

FT 5105 Food Microbiology 2

Page 3: FERMENTATION Selected slides - pgia.ac.lk · Alcoholic Fermentation Alcoholic fermentation of glucose C 6 H 12 O 6 → 2 C 2 H 5 OH + 2 CO 2 glucose ethanol carbon dioxide

FT 5105 Food Microbiology 3

Page 4: FERMENTATION Selected slides - pgia.ac.lk · Alcoholic Fermentation Alcoholic fermentation of glucose C 6 H 12 O 6 → 2 C 2 H 5 OH + 2 CO 2 glucose ethanol carbon dioxide

Alcoholic Fermentation

Alcoholic fermentation of glucose

C6H12O6 → 2 C2H5OH + 2 CO2glucose ethanol carbon dioxide

Glucose Glycolysis Pyruvic Acid

AcetaldehydeEthyl Alcohol

CO2

ATPATP

NADHNADH

NAD+

NAD+

Page 5: FERMENTATION Selected slides - pgia.ac.lk · Alcoholic Fermentation Alcoholic fermentation of glucose C 6 H 12 O 6 → 2 C 2 H 5 OH + 2 CO 2 glucose ethanol carbon dioxide

Lactic Acid Fermentation

Page 6: FERMENTATION Selected slides - pgia.ac.lk · Alcoholic Fermentation Alcoholic fermentation of glucose C 6 H 12 O 6 → 2 C 2 H 5 OH + 2 CO 2 glucose ethanol carbon dioxide

Fermenters

FT 5105 Food Microbiology 6

Page 7: FERMENTATION Selected slides - pgia.ac.lk · Alcoholic Fermentation Alcoholic fermentation of glucose C 6 H 12 O 6 → 2 C 2 H 5 OH + 2 CO 2 glucose ethanol carbon dioxide

FT 5105 Food Microbiology 7

Page 8: FERMENTATION Selected slides - pgia.ac.lk · Alcoholic Fermentation Alcoholic fermentation of glucose C 6 H 12 O 6 → 2 C 2 H 5 OH + 2 CO 2 glucose ethanol carbon dioxide

FT 5105 Food Microbiology 8

Page 9: FERMENTATION Selected slides - pgia.ac.lk · Alcoholic Fermentation Alcoholic fermentation of glucose C 6 H 12 O 6 → 2 C 2 H 5 OH + 2 CO 2 glucose ethanol carbon dioxide

Industrial Fermentation Process

FT 5105 Food Microbiology 9

Page 10: FERMENTATION Selected slides - pgia.ac.lk · Alcoholic Fermentation Alcoholic fermentation of glucose C 6 H 12 O 6 → 2 C 2 H 5 OH + 2 CO 2 glucose ethanol carbon dioxide

FT 5105 Food Microbiology 10

Page 11: FERMENTATION Selected slides - pgia.ac.lk · Alcoholic Fermentation Alcoholic fermentation of glucose C 6 H 12 O 6 → 2 C 2 H 5 OH + 2 CO 2 glucose ethanol carbon dioxide

FT 5105 Food Microbiology 11

Page 12: FERMENTATION Selected slides - pgia.ac.lk · Alcoholic Fermentation Alcoholic fermentation of glucose C 6 H 12 O 6 → 2 C 2 H 5 OH + 2 CO 2 glucose ethanol carbon dioxide

FT 5105 Food Microbiology 12

Page 13: FERMENTATION Selected slides - pgia.ac.lk · Alcoholic Fermentation Alcoholic fermentation of glucose C 6 H 12 O 6 → 2 C 2 H 5 OH + 2 CO 2 glucose ethanol carbon dioxide

Culture Action Diary Product

L. delbrueckii bulgaricus

Acid and flavor Bulgarian butter milk

L. Acidophilus Acid Acidophilus milk

Leuconostoc cremoris

Flavor Cultured buttermilk, sour cream, cottage cheese

S. lactis diacetylactis

Acid and flavor Sour cream, buttermilk

L. lactis and bulgaricus and yeast

Acid and alcohol Kefir & Kumiss

S. faecalis Acid and flavor Swiss and Cheddar cheese

Page 14: FERMENTATION Selected slides - pgia.ac.lk · Alcoholic Fermentation Alcoholic fermentation of glucose C 6 H 12 O 6 → 2 C 2 H 5 OH + 2 CO 2 glucose ethanol carbon dioxide

FT 5105 Food Microbiology 14Mashing vessels

Page 15: FERMENTATION Selected slides - pgia.ac.lk · Alcoholic Fermentation Alcoholic fermentation of glucose C 6 H 12 O 6 → 2 C 2 H 5 OH + 2 CO 2 glucose ethanol carbon dioxide

FT 5105 Food Microbiology 15

Lauter Tun

Page 16: FERMENTATION Selected slides - pgia.ac.lk · Alcoholic Fermentation Alcoholic fermentation of glucose C 6 H 12 O 6 → 2 C 2 H 5 OH + 2 CO 2 glucose ethanol carbon dioxide

FT 5105 Food Microbiology 16

Hops

Page 17: FERMENTATION Selected slides - pgia.ac.lk · Alcoholic Fermentation Alcoholic fermentation of glucose C 6 H 12 O 6 → 2 C 2 H 5 OH + 2 CO 2 glucose ethanol carbon dioxide

FT 5105 Food Microbiology 17

Fermentation tanks

Page 18: FERMENTATION Selected slides - pgia.ac.lk · Alcoholic Fermentation Alcoholic fermentation of glucose C 6 H 12 O 6 → 2 C 2 H 5 OH + 2 CO 2 glucose ethanol carbon dioxide

FT 5105 Food Microbiology 18Beer production process flow diagram

Page 19: FERMENTATION Selected slides - pgia.ac.lk · Alcoholic Fermentation Alcoholic fermentation of glucose C 6 H 12 O 6 → 2 C 2 H 5 OH + 2 CO 2 glucose ethanol carbon dioxide

FT 5105 Food Microbiology 19

Beer production process

Page 20: FERMENTATION Selected slides - pgia.ac.lk · Alcoholic Fermentation Alcoholic fermentation of glucose C 6 H 12 O 6 → 2 C 2 H 5 OH + 2 CO 2 glucose ethanol carbon dioxide

FT 5105 Food Microbiology 20

A

B

C

DE

F

A-B - Germicidal actionB-C - S. lactisC-D - LactobacillusD-E - molds (oxidize

acids) + yeasts (produce NH3)

E-F - Proteolytic spore former bac.

Aci

dit

y %

Time

Sequence of changes in raw milk in relation to acid concentration

Page 21: FERMENTATION Selected slides - pgia.ac.lk · Alcoholic Fermentation Alcoholic fermentation of glucose C 6 H 12 O 6 → 2 C 2 H 5 OH + 2 CO 2 glucose ethanol carbon dioxide

FT 5105 Food Microbiology 21

Aci

dit

y %

Time (days)

Sequence of acid fermentation in sauerkraut production

L. mesenteroides

L.curcumeris

L. Pentoaceticus & L. plantarum