This document discusses the importance of yeast in industrial microbiology. It begins by introducing industrial microbiology and describing microbes as ideal organisms for industrial processes due to their enzymes, metabolic activity, reproduction rate, and manipulability. It then discusses how yeast is commonly used in industries like food production, beverages, and baking. Specific examples are given of yeast being used to produce items like soy sauce, sour bread, and alcohol. The document concludes by noting the significance of yeast in food, beverage, medical, and chemical industries through various fermentation processes.

1. SHRI SHANKRACHARYA MAHAVIDYALA
Junwani , BHILAI (C.G.)
INDUSTRIAL MICROBIOLOGY
(IMPORTANCE OF YEAST)
Presented By:
Dr. Rachana Choudhary

2. Introduction
Industrial microbiology is an important branch of
microbiology dealing with those areas of
microbiology involving economic aspect ,where
valuable products are prepared from cheaper ,and
often disposable, substrates.

3. Synopsis
1) Introduction
2) Microbes – Ideal Organism
3) Microorganism used in industrial process
 Industrial uses of yeast
 Production of antibiotics
 Fermentation of organic acid
4) Industrial uses of bacteria
5) Biomining
6) Production of alcohol
7) Significance
8) Conclusion
9) Reference

4. Microbes-Ideal Organism
Industrial process for microbes;ideal organisms
example:-
1.Possess a variety of enzymes.
2.Have high metabolic activity.
3.Have a very high rate of multiplication.
4.Have chance for induced mutations.
5.They are easy to manipulate in laboratory.

5. Micro-organism used in industrial
process
Industrial uses of yeast:-
1. In the industrial and technical area of microbial
world yeast is being used.
2. Some species and strains of yeast are commercially
used.
3. Yeast are used in alcoholic beverages production
and baking food stuffs.

6. Commercial products of yeast
Product Micro-organism
1.Soya sauce Sacchromyces Rouxii
2.Sour French bread Candida Milleri
3.Commercial Alchohal Sacchromyces Cerviseae
Ethenol
4. Microbial Protein Candida Utilis

7. Production of alcoholic beverages
Alcoholic beverages like beer,wine & whisky are
produced by fermentation process.
Wine - produced by fermented juice of Grapes ,
Cherries & Berries.
Beer – This alcoholic product is produced by
fermentation process of Barley.
Whisky – It is produce by fermented Corn , Wheat &
Grains.

8. Production of antibiotics
The name of antibiotics was given by Mr.Walksman in
1940 for medical field example;-
Antibiotics Micro-organisms
Chloramphenicol Streptomyces Venezuela
Erythromycin Streptomyces
eruthreus
Penicillin Penicillium chrusogenum
Streptomycin Streptromyces
griseous

9. Penicillin- it is highly desirable to use a high-yielding strain
in the manufacture of an antibiotic. This can be achieved
by sequential genetic selection.
Streptomycin- the culture used in streptomycin production
is streptomyces griseust. Glucose , fructose , galactose ,
xylose, mannitol , maltose , lactose or starch can be used
substrates in the fermentation medium.

10. Uses of antibiotics
1.In animal’s and plant’s bacterial disease
treatment.
2. In storage of perishable foods like meat,
fish & poultry .
3.To inhibit undesirable bacterial growth of
culture media.
4.In the form of contamination control
agent in special fermentation process.
5.Swine calves and other domestic
animals.
.

11. Fermentation of organic acid
Introduction – about sixty kinds of organic acids are
known as microbial products example- citric acid , amino
acid , glutamic acid.
Citric acid-citric acid used in many fields. Its industrial
uses may be listed as under :
1.As an acidulant in food and pharmaceutical industries.
2.Citrate & citrate as plasticizers.
3. It is used in soft drinks & carbonated beverages
4. It is used in production of detergents.
5. It is used in tanning & Textiles.

12. Amino acid production:-amino acids, like vitamins form an
important class of compounds . they required by living
cells as growth factors.
Glutamic acid production-a derivative of glutamic acid
mono-sodium glutamate is used to develop a flavor in
food products.
Glutamic acid is in high demand as condiment.

13. Significance – In the industrial processes like food
stuff, alcoholic beverages, medical fields & chemical
industries yeast are broadly used by various
fermentation processes.
Conclusion- By industrial process too many
microorganism are used by which fermentation of
many useful products are being done.
Reference-
Pawar & Daginawala(microbiology)
H.N. Patel (industrial microbiology)