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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)