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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