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Table 2 Parameters at aerobic growth of K. marxianus DSM 5422 in media with various sources of nitrogen without previous pH adjustment

From: Efficient growth of Kluyveromyces marxianus biomass used as a biocatalyst in the sustainable production of ethyl acetate

Parameter Added source of nitrogen
  No supplement (NH 4 ) 2 SO 4 (NH 4 ) 2 CO 3 Urea
Supplied N [mg/L] 0 106 146 117
NH4-N + urea-N [mg/L] 7 113 153 124
Initial pH value [−] 5.96 5.94 7.50 7.18
μ at t = 14 h [h−1] 0.51 0.57 0.29 0.57
Final sugar [g/L] 0.92 0.00 0.15 0.00
Final biomass [g/L] 0.47 1.23 1.06 1.29
Final pH value [−] 3.99 2.47 3.45 7.10
  1. The whey and the sources of nitrogen were autoclaved together; the data belong to the experiment shown in Figure 1; the final parameters were measured after a total of 40 h of cultivation.
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