The constant PH in 3L fermentation indicated that different constant pH values during fermentation affect the yield of EPS from FML02-8. Under the constant pH5.5, the yield of EPS was 503.3mgL, increasing 30% compared without control of pH.

• 3L发酵罐的pH控制发酵表明：发酵过程的pH控制也影响FML02-8合成EPS的产量，通过流加碱控制pH5.；5，EPS的合成量达503