Electronic Journal of Biotechnology ISSN: 0717-3458
  © 2002 by Universidad Católica de Valparaíso -- Chile
Vol. 5 No. 2, Issue of August 15, 2002
 


Table 3.

Effect of different MnSO4 concentration on citric acid fermentation and culture's comparison for different variables.


Parametric variables

MnSO4 concentration (a x 10-5M)

1.0 x 10-6

2.0 x 10-6

3.0 x 10-6

4.0 x 10-6

NIAB-280

NGGCB101

Zowang-12

NIAB-280

NGGCB101

Zowang-12

NIAB-280

NGGCB101

Zowang-12

NIAB-280

NGGCB101

Zowang-12

Total acid (g/l)

Citric acid (g/l)

Dry cell mass (g/l)

Sugar used (g/l)

Sp. Productivity
(g/l/h)

Morphology

Pellet diameter (mm2)

Peak day of product formation

90.20

81.12

17.50

92.65

0.875


Pellets

1.05


6

95.44

89.67

14.55

94.50

0.898


Pellets

1.75


5

92.64

82.24

17.50

108.50

0.852


Pellets

2.52


5

82.85

73.22

15.50

80.55

0.567


Viscous

-


6

125.04

119.60

13.50

92.50

0.928


Pellets

1.55


4

94.60

83.25

16.50

118.50

0.872


Viscous

-


5

75.42

65.44

12.00

76.52

0.459


Viscous

-


6

105.45

99.67

14.75

88.00

0.878


Pellets

1.40


4

82.30

73.20

14.00

124.55

0.812


Viscous

-


5

69.96

58.98

8.50

69.65

0.426


Viscous

-


6

90.02

78.62

12.50

84.20

0.760


Pellets

1.25


4

71.50

68.15

12.65

128.50

0.782


Viscous

-


4


Initial sugar concentration 150 g/l, initial pH 6.0, aeration rate 1.0l/l/min, Incubation temperature 30C. All the results are sum mean of three parallel replicates. MnSO4 concentrations were added at the time of mycelial inoculation

Supported by UNESCO / MIRCEN network