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Table 3 Parameters at aerobic growth of K. marxianus DSM 5422 in media with various sources of nitrogen with initial 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 [−] 6.50 6.50 6.50 6.50
μ at t = 14 h [h−1] 0.59 0.59 0.59 0.59
Final sugar [g/L] 1.03 0.00 0.00 0.00
Final biomass [g/L] 0.47 1.29 1.25 1.44
Final pH value [−] 4.29 2.43 2.54 6.45
  1. The whey and the sources of nitrogen were autoclaved separately; the data belong to the experiment shown in Figure 2; the final parameters were measured after a total of 40 h of cultivation.