Enhanced surfactin production via the addition of layered double hydroxides

In this study, Mg–Al layered double hydride (LDH) was prepared and the impact of LDH addition on the biomass and surfactin yield for cultures of Bacillus subtilis CWS1 was examined. Various solid additives, including montmorillonite (MMT), activated carbon (AC) and LDH, were tested. Among these, LDH triggered the highest surfactin yield at 3789 mg/L. The optimal conditions for surfactin production were 2 g/L LDH supplied on the beginning of a...