Microorganisms Use as a Single Cell Protein (SCP)
Many groups of microorganisms are used as sources of proteins. Some of the microorganisms with their carbon and energy sources are given in Table 18.1.
Table 18.1. Single cell protein (SCP) and mycoprotein produced on the selected substrates.
| Microgial microorganisms groups |
Protein (% /100g., on dry weight basis) |
Substrates |
| Algae |
Chlorella pyrenoidosa (36)a |
- |
CO2 (10%), light |
| Scenedesmus acutus (20)b |
- |
CO2 sunlight |
| Spirulina maxima (15)b |
53 |
CO2 (5%), combustion gases, bicarbonate, sunlight (in pond) |
| Bacteria |
Achromobacter delvacvate |
- |
Diesel oil in fermenter |
| Bacillus megaterium |
- |
Collagen meat packing waste in fermenter |
| Cellumonas sp. (0.45)c |
87 |
Bagasse |
| Methylomonas clara (0.5)c |
13 |
Methanol |
| Pseudomonas so. (1.0)c |
- |
n-alkanes fuel oil |
| Actinomycetes |
Nocardia sp. (0.98)c |
- |
n-alkanes |
| Thermomonpspora fusca (0.4)c |
5.6 |
Cellulose pulp |
| Fungi |
|
|
|
| I. Yeasts |
Candida lipolytica (0.88)c |
65-69 |
n-alkanes |
| C. utilis (0.39)c |
|
Potato starch waste |
| B. utilis |
54 |
Sulphite liquor |
| Saccharomyces cerevisiae (0.5)c |
53 |
Molasses |
| Saccharomyces cerevisiae (0.5)c |
45 |
Beer |
| S. fragilis |
54 |
Milk whey |
| Rhodotorula glutinis |
- |
Domestic sewage |
| Torulopsis sp. |
- |
Methanol |
| II.Moulds |
Aspergillus niger |
50 |
Molasses |
| Trichoderma viride |
64 |
Straw, starch |
| Paecilomyces varioti |
55 |
Sulphite waste liquor |
| III. Mushrooms |
Agaricus campestris |
36-45 |
Glucose |
| Morchella crassipes |
31 |
Glucose, cheese whey, sulphite, liquor. |
(a) yield g/day (on dry weight basis); (
b) yield g/m
2/day (on dry weight basis);
(c) yield dry weight basis (g/g substrate used). Values in parantheses-denote yield of biomass.
