Abstract：
:This study aims to efficiently use hemicellulose-based biomass for ABE (acetone-butanol-ethanol) production by co-fermentation with starch-based biomass. Two processes were investigated: (I) co-fermentation of sugars derived from hemicellulose and starch in a mixture of barley straw and grain that was pretreated with dilute acid; (II) co-fermentation of straw hemicellulosic hydrolysate and gelatinized grain slurry in which the straw was pretreated with dilute acid. The two processes produced 11.3 and 13.5 g/L ABE that contains 7.4 and 7.8 g/L butanol, respectively. In process I, pretreatment with 1.0% H2SO4 resulted in better ABE fermentability than with 1.5% H2SO4, but only 19% of pentoses were consumed. In process II, 95% of pentoses were utilized even in the hemicellulosic hydrolysate pretreated with more severe condition (1.5% H2SO4). The results suggest that process II is more favorable for hemicellulosic biomass utilization, and it is also attractive for sustainable biofuel production due to great biomass availability.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Yang M,Kuittinen S,Zhang J,Vepsäläinen J,Keinänen M,Pappinen Adoi
10.1016/j.biortech.2014.12.005subject
Has Abstractpub_date
2015-03-01 00:00:00pages
128-135eissn
0960-8524issn
1873-2976pii
S0960-8524(14)01742-8journal_volume
179pub_type
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