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  Section: General Biotechnology / Microbial Biotechnology
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Single Cell Protein (SCP) and Mycoprotein


Advantages of Producing Microbial Protein

Roth (1982) has described a number of advantages in the production of microbial protein, compared to protein problems of conventional crops used as food and feed. These include :

(i)    Rapid succession of generations (algae, 2-6h; yeast, l-3h; bacteria, 0.5-2h);

(ii)   Easily modifiable genetically (e.g. for composition of amino acids);

(iii) High protein content of 43-85 per cent in the dry mass;

(iv) Broad spectrum of original raw material used for the production, which also includes waste products;

(v)   Production in continuous cultures, consistent quality not dependent on climate in determinable amount, low land requirements, ecologically beneficial. Other advantages are : (a) high solar energy conversion efficiency per unit area (net production in cultivated land-290 gC/m2/day, lakes and streams - 225 gC/m2/day ; estuaries - 810 gC/m2/day), (b) easy regulation of environmental factors e.g. physical, nutritional, etc. which maximize solar energy conversion efficiency and yield (c) cellular, molecular and genetic alterations and (d) algal culture in space, which is normally unused instead of competing for land (Vijayan, 1988).




Advantages of producing microbial protein

Microorganisms use as single cell protein (SCP)

Substrates used for the production of SCP

Nutritional values of SCP

Genetic improvements of microbial cells

Production of algal biomass


Factors affecting bio­mass production


Harvesting the algal biomass


Spirulina as SCP, cultivation and uses

Production of bacterial and actinomycetous biomass


Method of production


Factors affecting biomass production


Product recovery

Production of yeast biomass


Factors affecting growth of yeast


Recovery of yeast biomass

Production of fungal biomass (Other than Mushrooms)


Growth conditions


Organic wastes as substrates


Traditional fungal foods













Mushroom culture


Historical background


Present status of mushroom culture in India


Nutritional values


Cultivation methods



Obtaining pure culture 



Preparation of spawns



Formulation and preparation of composts



Spawning, spawn running and cropping


Control of pathogens and pests


Cultivation of paddy straw mushroom


Cultivation of white button mushroom


Cultivation of Dhingri (Pleurotus sajor-caju)


Recipes of mushroom



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