Lecture 16 Microbiology In Food Industry

Question 1

What is Single Cell Protein (SCP)

Answer 1

microbial cells grown and harvested for animal/ human food

Question 2

Why chose SCP

Answer 2

•rapid growth
•high protein content
•use cheap organic substrates to grow

Question 3

Single Cell Protein (SCP) can be produced from

Answer 3

•Algae
•Fungi
•Bacteria

Question 4

Substrates for micro-organism production

Answer 4

•Algae: use CO2 + sunlight
•Fungi: cheap wastes supply C + N source
•Bacteria: wastes or by products of industrial processes

Question 5

What is the nutritive value of micro organism Algae

Answer 5

•rich in proteins, fats + vitamins A,B,C,D,E
•40-60% protein
•7% mineral

Question 6

What is the nutritive value for microorganism Fungi

Answer 6

•B-complex group of vit.
•aa content of A.niger: well balanced
•Yeast: have thiamine, riboflavin, biotin

Question 7

What is the nutritive value for microorganism bacterial SCP

Answer 7

•high in protein + certain essential aa
•methionine: 2.2-3% > algal (1.4-2.6%) and fungi (2.5-1.8%)

Question 8

Mushrooms

Answer 8

Filamentous fungi that form fruiting bodies known as mushrooms

Question 9

When were Alflatoxins first discovered

Answer 9

1960

Question 10

Alflatoxins are mainly produced by what

Answer 10

Aspergillus flavus, A.parasiticus

Question 11

Name the 4 main Alflatoxins

Answer 11

•B1
•B2
•G1
•G2

Question 12

Aflatoxins found in:

Answer 12

maize, animal products, peanuts.