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Bioresources and Bioprocessing
Fig. 5 | Bioresources and Bioprocessing

Fig. 5

From: Production of pyruvic acid with Candida glabrata using self-fermenting spent yeast cell dry powder as a seed nitrogen source

Fig. 5

Time course of pyruvic acid biosynthesis in a 50 L bioreactor. The pressure of the fermenter was controlled at 0.035 MPa, and the stirring speed and aeration were amplified step by step (0–4 h, 200 rpm, 10 L/min; 4–8 h, 300 rpm, 20 L/min; 8–60 h, 400 rpm, 30 L/min; 60–95 h, 500 rpm, 30 L/min). At the end of fermentation, the pyruvic acid titer was 65.1 g/L, and the conversion rate was 0.61 g/g. Triangles, DCW; circles, glucose; squares, pyruvic acid

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