Biomass production from Kluyveromyces spp. by using cheese whey


Karzan T. Mahmood

Food Science Dept. Faculty Of Agricultural Science University Of Sulaimani , Kurdistan Region- Iraq



Abstract
Cheese whey was used as a medium for producing yeast biomass from Kluyveromyces
lactis DSM 70800 and Kluyveromyces fragilis. The best conditions for yeast biomass
production were 35oC with agitation speed of 150 and 200 rpm for Kluyveromyces fragilis
and Kluyveromyces lactis DSM 70800 respectively. Both strains can grow in a wide range
of pH. The maximum biomass yield recorded when whey with pH 6.5 was used. The crud
protein based on dry weight was relatively high and the crud protein % of Kluyveromyces
lactis DSM 70800 (50.56%) was insignificantly higher than that was obtained for
Kluyveromyces fragilis (49.53%) while the protein yield was insignificantly higher for
Kluyveromyces fragilis. On the other hand, the essential and non-essential amino acids
were present in a various amount, among these amino acids arginine was present in high
level in both strains which has the good nutritive value especially for children.

Key Words: Biomass, Yeast, Kluyveromyces, Cheese whey.



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