Enhanced Ethanol and Biogas Production from Pinewood by NMMO Pretreatment and Detailed Biomass Analysis

Table 2

Water swelling capacity and relative enzyme adsorption of the NMMO pretreated and untreated pinewood.

Pretreatment	Wood size	Water swelling capacity; (g water/g wood)^1	Relative enzyme adsorption^2
Untreated	Powder	7.2	4.0
Pretreated for 1 h	Powder	10.0	4.9
Pretreated for 3 h	Powder	10.7	5.2
Pretreated for 15 h	Powder	11.0	6.7
Untreated	chips	1.0	1.0
Pretreated for 1 h	chips	2.0	1.5
Pretreated for 3 h	chips	3.7	2.7
Pretreated for 15 h	chips	3.8	4.3

1The standard deviation of all samples was less than 6.3%.
2The standard deviation of all samples was less than 7.2%.