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Table 4 Comparison of the properties of biodiesel for lipid by R-ZL2 fermented with different C/N ratios

From: Optimising nutrients in the culture medium of Rhodosporidium toruloides enhances lipids production

C: 4% sucrose

N: ammonium nitrate

Viscosity (mm/s2)

Specific gravity

Cloud point (°C)

Cetane number

Iodine number

Higher heating value (MJ/kg)

C/N = 20:1

4.52

0.8786

5.54

55.66

93.19

40.44

C/N = 40:1

4.58

0.8781

6.69

56.24

86.77

40.29

C/N = 80:1

4.65

0.8775

8.20

56.99

78.40

40.09

C/N = 160:1

4.65

0.8774

8.29

57.03

77.89

40.08

C/N = 200:1

4.64

0.8775

8.08

56.93

79.08

40.10

C/N = ∞

4.64

0.8775

7.99

56.88

79.56

40.12

S50

1.9–6.0

0.82–0.9

49 (minimum)

101 (maximum)

ASTM D6751

1.9–6.0

47 (minimum)

93 (maximum)

EN 14,214

3.5–5.0

0.86–0.9

51 (minimum)

120 (maximum)

  1. When 4% sucrose as the carbon source, ammonium nitrate as the nitrogen sources comparison of the properties of biodiesel for lipid by R-ZL2 fermented with different C/N ratios with those of Chinese, U.S. and EU biodiesel standards)