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Electronic Journal of Biotechnology ISSN: 0717-3458
  © 2011 by Universidad Católica de Valparaíso -- Chile
Vol. 14 No. 2, Issue of April 15, 2011
 

Table 6. Supplementation of sieved stillage with yeast extract (YE) and molasses (5% and 10%); pH controlled with NH4OH.



 

5%M

10%M

Parameter

1.77g/l YE

3.54 g/l YE

7.08 g/l YE

1.77 g/l YE

3.54 g/l YE

7.08 g/l YE

Glucose conversion [%]*

100

100

100

51.1

82.7

99.8

Max LA [g/l]

33.1
[24]

28.4
[36 h]

28.2
[24 h]

39.9
[48 h]

47.6
[36 h]

49.8
[24 h]

Maximal number of
LAB [cfu/ml]

1.3 x 1010
[24 h]

0.9 x 1010
[24 h]

1.3 x 1010
[24 h]

1.6 x 1010
[48 h]

1.3 x 1010
[48 h]

0.99 x 1010
[48 h]

YP/S [g/g]*

0.96
(96%)a

1.06
(106%)a

1.02
(102)a

1.05
(53%)a

0.845
(70%)a

0.947
(95%)a

QP [g/(l·h)]*

1.38

1.18

1.18

1.24

1.55

2.08

*Glucose conversion, YP/S and QP were calculated for values obtained in the 24 hrs of the process.
a % of the theoretical yield