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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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Energy, Sustainability and Society

ISSN: 2192-0567

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