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http://dx.doi.org/10.9713/kcer.2016.54.4.494

Improved Ethanol Production from Deacetylated Yellow Poplar (Liriodendron tulipifera) by Detoxification of Hydrolysate and Semi-SSF  

Kim, Jo-Eun (Department of Forest Products and Technology, Chonnam National University)
Lee, Jae-Won (Department of Forest Products and Technology, Chonnam National University)
Publication Information
Korean Chemical Engineering Research / v.54, no.4, 2016 , pp. 494-500 More about this Journal
Abstract
In order to remove acetyl group from yellow poplar, deacetylation was performed using sodium hydroxide (NaOH) prior to oxalic acid pretreatment. During the deacetylation ($60^{\circ}C$ for 80 min, 0.8% NaOH), most of the acetyl group were removed from hemicellulose. Simultaneous saccharification and fermentation (SSF) and semi-SSF were carried out based on solid loading (10, 12.5, 15%) of deacetylated biomass and pre-hydrolysis with enzymes (0, 6, 12, 24 h). The highest ethanol was obtained as 26.73 g/L after 120 h when 10% of biomass was used for SSF. It is corresponding to 88.41% of theoretical ethanol yield. At the 12.5% and 15% of biomass loading, the highest ethanol was obtained from 6 h pre-hydrolysis. It was 32.34 g/L and 27.15 g/L, respectively, and corresponding to ethanol yield of 85.58 and 59.87%. In order to remove fermentation inhibitors from hydrolysates, overliming was performed using calcium hydroxide ($Ca(OH)_2$). The highest ethanol was 5.28 g/L after 72 h of fermentation.
Keywords
Oxalic acid pretreatment; Semi-simultaneous saccharification and fermentation (semi-SSF); Biomass loading; Ethanol;
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Times Cited By KSCI : 6  (Citation Analysis)
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