The Effect of Digested Manure on Biogas Productivity and Microstructure Evolution of Corn Stalks in Anaerobic Cofermentation

Figure 5

Scanning electron micrographs: magnification of ×1000 (left part) and ×5000 (right part). (a) Pure corn stalk; (b) corn stalk with FCD; (c) test group #1; (d) test group #2; (e) test group #3; (f) test group #4; (g) test group #5.