Fig. 2From: Early warning indicators for mesophilic anaerobic digestion of corn stalk: a combined experimental and simulation approachA comparison of experimental and simulated acetic acid (a1, a2), propionic acid (b1, b2), butyric acid (c1, c2), and total VFA (d1, d2) concentrations related to the laboratory experiments. Data presented in subplots a1, b1, c1, and d1 represent R1, and those in subplots a2, b2, c2, and d2 represent R2Back to article page