Fig. 1.

Effect of different fermentation modes on the combined “de novo” and “ex novo” lipid fermentation: a First “de novo” then “ex novo” lipid fermentation, b first “ex novo” then “de novo” lipid fermentation, c fed-batch mode, and d batch mode. For combined “de novo” and “ex novo” lipid fermentation (a–d), soybean oil was added into the corncob acid hydrolysate with different modes; for control experiment, fermentation was carried out in corncob acid hydrolysate without adding soybean oil