Patent ID: 7846702
Filing Date: 2010-12-07
Classification: A23L,C12N,C12P

Abstract:
1. A process for producing xylitol in high yield by recycling culture of a strain of the genus Candida , which comprises the steps of: inoculating the strain in a xylose-containing medium and culturing the strain in the xylose-containing medium in a bioreactor; releasing a culture from the bioreactor and introducing a fresh xylose-containing medium to the bioreactor continuously; separating the strain and a culture filtrate from the culture, which is performed by a vacuum microfiltration system or a centrifuge; and recycling the strain to the bioreactor and recovering xylitol from the culture filtrate wherein the xylose-containing medium is a chemically defined medium that comprises 5-300 g/l of xylose, 1-10 g/l of urea,1-10g/l of potassium diphosphate, 0.01-1 g/l of magnesium sulfate, 0.1-10 mg/l of MnSO