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

Table 4

The result of between-subjects effects (dependent variables: ).

Source	III model 0	df	Mean square		Sig.
Correcting model	42544349.6^a	26	1636321.137	2.635	0.001
Intercept	22460617248	1	22460617248	36165.606	0.000
A	933550.222	2	466775.111	0.752	0.476
B	6618446.889	2	3309223.444	5.328	0.008
C	644693.556	2	322346.778	0.519	0.598
A * B	2944740.444	4	736185.111	1.185	0.328
A * C	6475833.778	4	1618958.444	2.607	0.046
B * C	8525127.111	4	2131281.778	3.432	0.014
A * B * C	16401957.556	8	2050244.694	3.301	0.004
Error	33536652.000	54	621049.111
Total	22536698250.000	81
Total correction	76081001.556	80

(regulate ).