Figure captions
Fig. 1. Sophorolipids produced by C. bombicola . A.
Acidic-form SLs; B. Lactone-form SLs. These structures can be non-(R1,
R2=-OH), mono-(R1=-OH, R2=-OCH3), or di-acetylated (R1, R2=-OCH3). (Chen
et al., 2020)
Fig. 2.Semi-continuous
fermentation platform (a. Fermentation broth inlet; b. Supernatant
outlet; c. SLs export).
Fig. 3.The
morphology and sedimentation of SLs at different O/S ratios.
Fig. 4. SLs
precipitation. A. Relationship between the sedimentation height ratio of
SLs and the concentration. B. Relationship between the average
sedimentation rate of SLs and O/S.
Fig. 5.Parameters
related to SLs precipitation. A. SLs particle size. B. Viscosity of
fermentation supernatant. C. Density of SLs and oil mixture. D. Density
of fermentation broth supernatant.
Fig. 6. Mechanism of SLs sedimentation.
Fig. 7. Ultrasonic
assisted SLs deposition. A. 100 W ultrasonic power. B. 200 W ultrasonic
power. C. 300 W ultrasonic power. D. Maximum sedimentation rate at
different power.
Fig. 8.Ultrasound-assisted in-situseparation. A. SLs titer. B. Residual oil, glucose and DCW
concentration. C. Productivity and yield of SLs.