Effect of Hydraulic Retention Time on Anaerobic Digestion of Wheat Straw in the Semicontinuous Continuous Stirred-Tank Reactors

Figure 1

Biogas production (■) and methane concentration (□) in anaerobic digestion of wheat straw with HRT of 20 (a), 40 (b), and 60 (c) days.

(a)

(b)

(c)