Table 2. Ethanol concentration in S-SSF and Fed-batch S-SSF of solid residues from LHW pretreated corn stover with different solid loadings.

Fermentation methods	S-SSF						Fed-batch S-SSF
Severity of preteatment of corn stover	Severity factor of 3.95			Severity factor of 4.54			Severity factor of 3.95		Severity factor of 4.54
Solid loading (%)	8.5	10	17	8.5	10	17	16.1 (10+6.1)	17 (10+2.8+2.3+1.9)	16.1 (10+6.1)	18.7 (10+2.8+2.3+1.9+1.7)
Ethanol concentration (g/L)	26.3±0	33.3±0	21.2±1.0	25.2±0.5	31.3±0.7	31.3±0.5	38.4±0	28.3±1.4	39.4±1.4	39.4±1.4