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Table 4 Effects of yeast extract concentration 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

YE content (w/w, %) 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
0.00 4.35 1.77 ± 0.01 3.07 ± 0.78 41.53 ± 3.62 10.03 ± 0.84 24.15
0.05 4.03 0.24 ± 0.04 3.55 ± 0.02 49.66 ± 0.99 22.32 ± 2.37 44.94
0.10 4.16 0.14 ± 0.11 4.47 ± 0.28 51.42 ± 0.92 21.60 ± 0.43 42.01
0.15 4.40 0.03 ± 0.00 4.65 ± 0.35 53.70 ± 2.61 22.06 ± 5.33 41.08
0.20 4.46 0.08 ± 0.06 5.64 ± 0.13 50.09 ± 5.92 20.57 ± 1.77 41.06
0.25 4.66 0.18 ± 0.04 6.88 ± 0.46 46.05 ± 4.30 20.12 ± 1.34 43.70
0.30 4.77 0.18 ± 0.00 7.32 ± 0.46 45.83 ± 2.00 18.12 ± 0.48 39.53