Abstract

Cheese whey, which is a byproduct of the cheese-making process, was pretreated by means of hydrodynamic cavitation (HC) under an alkaline condition and then was converted to lipid using our newly isolated oleaginous yeast Cryptococcus curvatus. The growth rate (7.2g/L/day) and lipid content (65%) were nearly double those obtained using commercial types of sugars such as glucose, galactose, and lactose. The lipid productivity level (4.68g/L/day) was the highest ever reported. HC-pretreated cheese whey under alkaline condition can serve as an excellent complete nutrient source and/or as a stimulant of lipid production.

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