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Table 3 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 sulfate

Viscosity (mm/s2)

Specific gravity

Cloud point (°C)

Cetane number

Iodine number

Higher heating value (MJ/kg)

C/N = 20:1

4.47

0.8790

4.43

55.10

99.33

40.58

C/N = 40:1

4.35

0.8801

1.89

53.83

113.54

40.92

C/N = 80:1

4.42

0.8795

3.27

54.52

105.85

40.74

C/N = 160:1

4.50

0.8788

5.05

55.41

95.93

40.50

C/N = 200:1

4.47

0.8790

4.43

55.11

99.35

40.58

C/N = ∞

4.53

0.8788

5.60

55.69

92.85

40.43

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 sulfate 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