Influence of fiber degradation and concentration of fermentable sugars on simultaneous saccharification and fermentation of high-solids spruce slurry to ethanol

Table 1 Summary of the experiments carried out

SSF run (120 h, 32°C)	Substrate	Prehydrolysis (48°C)	Addition of enzyme	Initial sugar concentration^a(g/L)
1^b	Whole slurry	No	Yes	38
2	Washed slurry	No	Yes	36
3	Liquid fraction	No	Yes	39
4^b	Whole slurry	22 hours	Yes	83^c
5	Washed slurry	No	Yes	116
6	Washed slurry	No	No	116
7	Washed slurry	No	Yes	76
8	Whole slurry	No	No	61
9^b	Whole slurry	4 hours	Yes	69^c
10	Whole slurry	No	No	119

^aFermentable sugars (glucose and mannose) in monomeric form.
^bAdapted from Hoyer et al.[8].
^cConcentration of fermentable sugars (glucose and mannose) at the time of the addition of the yeast.

ISSN: 1754-6834