Improve the Anaerobic Biodegradability by Copretreatment of Thermal Alkali and Steam Explosion of Lignocellulosic Waste

Figure 4

SEM images (500x) of untreated (a), SE treated (b), thermal KOH treated (c), and CPTPS_1.5% treated (d) CS.

(a)

(b)

(c)

(d)