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Table 5 Effects of pH regulators on final broth pH, cell growth and SL production

From: Sophorolipids production from rice straw via SO3 micro-thermal explosion by Wickerhamiella domercqiae var. sophorolipid CGMCC 1576

pH regulator Final pH Residual glu (g/L) Biomass (g/L) Total SL (g/L) Lactonic SL (g/L) Lac SL/tot SL (%)
Control group 2.55 0.81 ± 0.08 6.53 ± 0.14 40.74 ± 1.60 18.83 ± 0.01 46.22
NaOH 4.56 0.81 ± 0.01 9.65 ± 0.01 38.89 ± 1.09 14.91 ± 0.52 38.33
K2CO3 5.62 2.40 ± 0.14 5.72 ± 0.39 38.27 ± 4.03 8.14 ± 3.46 21.27
CaO 5.71 0.29 ± 0.02 9.92 ± 1.01 40.69 ± 0.88 11.96 ± 4.46 29.38
AlCl3 3.89 0.20 ± 0.02 7.05 ± 0.12 50.09 ± 3.64 23.58 ± 4.79 47.08
C6H8O7 4.18 0.17 ± 0.02 9.21 ± 0.08 41.01 ± 0.48 20.03 ± 2.56 48.84
Na3C6H5O7·2H2O 4.48 0.24 ± 0.00 5.87 ± 0.08 39.52 ± 1.96 16.13 ± 0.79 40.81