Figure 5. The 3D response surface curves of the combined effects of initial xylan concentration, mixed time and MgCO3 concentration on succinic acid production and fermentation profiles under optimal conditions.
(A) initial xylan concentration and mixed time at fixed level of MgCO3 concentration, (B) initial xylan concentration and MgCO3 concentration at fixed level of mixed time, (C) mixed time and MgCO3 concentration at fixed level of initial xylan concentration, (D) fermentation profiles of T. thermosaccharolyticum M5 and A. succinogenes 130Z under optimal conditions.