BIOCONVERSION OF WHEY INTO BIOMASS OF  KLUYVERMYCES  SP. AND ITS NUTRITIONAL STUDY.

Growth characteristics, gross composition and the nutritive value in terms of liver protein regeneration capacity, protein efficiency ratio and the protein digestibility of the biomass of Kluyvermyces marxianus subsp. marxianus NRRL Y-2415 were determined after growth in concentrated acid whey (12.72% lactose) at 30⁰C. The biomass (11.2 g/L) had a crude protein content of 49.8% and true protein content of 42.4%. Groups of 5 male albino rats 21-28 days old when given diets with protein supplied by casein, protein biomass from Kluyvermyces marxianus subsp. marxianus NRRL Y-2415 or the protein biomass supplemented with 0.5% DL-methionine showed liver protein regeneration capacity (after a 2-day fast) of 90%, 34% and 93.3%, protein efficiency ratio 2.6, 1.76 and 2.83 and true protein digestibility of 93.30, 93.31 and 93.43%, respectively. Feeding of rats with single cell protein showed no ill effects on the rats.

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eISSN:	2083-6007
ISSN:	1230-0322

W latach 2022-2024 kwartalnik naukowy Polish Journal of Food and Nutrition Sciences realizuje projekt nr RCN/SP/0520/2021/1 finansowany ze środków budżetu państwa – Ministerstwo Edukacji i Nauki w ramach programu „Rozwój czasopism naukowych”. Dofinansowanie wynosi 120 000 zł. W ramach projektu podejmowane są działania zmierzające do podniesienia poziomu praktyk wydawniczych i edytorskich, zwiększenia wpływu czasopism na rozwój nauki oraz utrzymania się czasopism w międzynarodowym obiegu naukowym.

In the years 2022-2024, the scientific quarterly Polish Journal of Food and Nutrition Sciences accomplishes a project no. RCN/SP/0520/2021/1 financed from the state budged – Ministry of Education and Science Republic of Poland in the framework of a program “Development of scientific journals”. The financing amounts to 120,000 PLN. The program aims at improving the level of publishing and editing practices, increasing the impact of scientific journals on science development, and extending the international range of scientific journals.