Dr. Pooja Singh MSc., PhD Botany

2. By:
Dr. Pooja Singh
M.Sc., Ph.D. (Botany)

4. The dried cells of microorganism used as food or feed for
animals and they are collectively known as Microbial
Proteins.
This term was replaced by a new term called as Single
Cell Protein.
This term single cell protein was
coined in 1966 by Corrol L. Wilson.

5.  Production of SCP requires microorganisms that serve as
the protein source and the substrate that is biomass on
which it grow.
 The biomass used can be plant biomass or organic
biomass.
 The microorganisms used belong to the
group of Algae Fungi and Bacteria.

8. Composition %
dry weight
Fungi Algae Yeast Bacteria
1 Protein 30-40% 40-60% 45-55% 50-65%
2 Fat 9-14% 8-10% 5-10% 3-7%
3 Nucleic acid 7-10% 3-8% 6-12% 8-12%

9. COMPARISION OF MICRO-ORGANISMS
ADVANTAGES DIS ADVANTAGES
FUNGI Easy to grow & harvest Lower growth rates & lower
protein content
ALGAE Easy to grow & harvest & high
quality protein
Non –digestible cellulosic
cell wall, concentrate heavy
metals
YEAST Larger in size, lower NA
content familiarity &
acceptability
Poor digestibility, low
protein , content, slow
growth rate
BACTERIA High protein content, digestible
cell wall
High NA content, small in
size, low density

10. Microorganism used for SCP
production
1. FUNGI
a) Aspergillus fumigatus
b) Aspergillus niger
c) Rhizopus cyclopium
d) Fusarium

11. 2.YEAST
a)Sacchromyces cerevisae
b)Candida tropicalis
c)Candida utilis
d)Candida lypolytica

12. 3. ALGAE
a)Spirulina species
b)Chlorella pyrenoidosa
c)Chondrus crispus
d)Chlorella species

13. 4.BACTERIA
a) Pseudomonas fluorescence
b) Lactobacillus
c) Baccilus megaterium
d) Methylotrophus

14. Steps Involved in Production
of SCP
a) Suitable strains need to be selected.
b) Fermentation of the microorganism.
c) Harvesting in proper condition.
d) Post harvesting treatments.
e) Single cell protein processing.

15. SCP Production properties
SCP production should have the following properties
a) Absence of pathogenicity and toxicity.
b) Protein quality and content.
c) growth rate.
d) adaptability to unusual environment condition.

16. Application of SCP
a) Obesity, weight, stress ,cholesterol and blood sugar level can be
all controlled with this therapeutic and pharmaceutical use.
b) Application for hair and skin products.
c) Malnourished people can benefit from protein supplements.
d) A convient feeding source for poultry,
fisheries and animal farms.

17. Advantage of SCP
a) High protein content of 43-85% in dry mass.
b) Rapid successions of generation.
c) low land requirement economically beneficial.
d) Utilization of solar energy.
e) Cellular, molecular and genetic alteration.

18. Disadvantage of SCP
a) High content of nucleic acid leading to elevated level of uric
acid.
b) Development of kidney stone and gout if consumed in high
quantity.
c) Possibility for the presence of secondary metabolites.
d) Poor digestibility.
e) Hypersensitivity skin reactions.