Research Article
Effect of Hydraulic Retention Time on Anaerobic Digestion of Wheat Straw in the Semicontinuous Continuous Stirred-Tank Reactors
Figure 2
The pH value in anaerobic digestion of wheat straw with HRT of 20 (a), 40 (b), and 60 (c) days.
(a) |
(b) |
(c) |