Abstract:
:This study demonstrated at the pilot-scale (50 kg) use of Douglas-fir forest harvest residue, an underutilized forest biomass, for the production of high titer and high yield bioethanol using sulfite chemistry without solid-liquor separation and detoxification. Sulfite Pretreatment to Overcome the Recalcitrance of Lignocelluloses (SPORL) was directly applied to the ground forest harvest residue with no further mechanical size reduction, at a low temperature of 145°C and calcium bisulfite or total SO2 loadings of only 6.5 or 6.6 wt% on oven dry forest residue, respectively. The low temperature pretreatment facilitated high solids fermentation of the un-detoxified pretreated whole slurry. An ethanol yield of 282 L/tonne, equivalent to 70% theoretical, with a titer of 42 g/L was achieved. SPORL solubilized approximately 45% of the wood lignin as directly marketable lignosulfonate with properties equivalent to or better than a commercial lignosulfonate, important to improve the economics of biofuel production.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Zhu JY,Chandra MS,Gu F,Gleisner R,Reiner R,Sessions J,Marrs G,Gao J,Anderson Ddoi
10.1016/j.biortech.2014.12.052subject
Has Abstractpub_date
2015-03-01 00:00:00pages
390-397eissn
0960-8524issn
1873-2976pii
S0960-8524(14)01797-0journal_volume
179pub_type
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