Improving Biomethane Production and Mass Bioconversion of Corn Stover Anaerobic Digestion by Adding NaOH Pretreatment and Trace Elements

Table 5

Biogas and biomethane yields and bioconversion rates for different groups.

Groups	Biogas yields		Biomethane yields		Bioconversion rates (%)
	mL/g TS	mL/g VS	mL/g TS	mL/g VS	TS	VS
A1B3C2	354 ± 17	393 ± 31	219 ± 12	243 ± 24	55.7 ± 0.5%	65.9 ± 0.6%
NaOH-pretreated	277 ± 23	307 ± 26	154 ± 16	171 ± 20	45.6 ± 0.2%	57.8 ± 0.5%
Untreated	247 ± 15	275 ± 18	135 ± 14	150 ± 19	35.6 ± 0.9%	53.0 ± 0.3%