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http://dx.doi.org/10.4014/mbl.1702.02009

Acetone, Butanol, Ethanol Production from Undaria pinnatifida Using Clostridium sp.  

Kwon, Jeong Eun (Department of Biotechnology, Pukyong National University)
Gwak, Seung Hee (Department of Biotechnology, Pukyong National University)
Kim, Jin A (Department of Biotechnology, Pukyong National University)
Ryu, Ji A (Yangsanjeil High School)
Park, Sang Eon (Yangsanjeil High School)
Baek, Yoon Seo (Yeamoon Girls' High School)
Heo, A Jeong (Yeamoon Girls' High School)
Kim, Sung-Koo (Department of Biotechnology, Pukyong National University)
Publication Information
Microbiology and Biotechnology Letters / v.45, no.3, 2017 , pp. 236-242 More about this Journal
Abstract
The conversion of marine biomass to renewable energy has been considered an alternative to fossil fuels. Butanol, in particular, can be used directly as a fuel. In this experiment, the brown alga Undaria pinnatifida was selected as a biomass for biobutanol production. Hyper thermal (HT) acid hydrolysis was used as an acid hydrolysis method to produce monosaccharides. The optimal pretreatment conditions for U. pinnatifida were determined as slurry with 10% (w/v) U. pinnatifida content and 270 mM $H_2SO_4$, and heating at $160^{\circ}C$ for 7.5 min. Enzymatic saccharification was carried out with Celluclast 1.5 L, Viscozyme L, and Ultraflo Max. The optimal saccharification condition was 12 U/ml Viscozyme L. Fermentations were carried out for the production of acetone, butanol, and ethanol by Clostridium acetobutylicum KCTC 1724, Clostridium beijerinckii KCTC 1785, and Clostridium tyrobutyricum KCTC 5387. The fermentations were carried out using a pH-control. The optimal ABE fermentation condition determined using C. acetobutylicum KCTC 1724 adapted to 160 g/l mannitol. An ABE concentration of 9.05 g/l (0.99 g/l acetone, 5.62 g/l butanol, 2.44 g/l ethanol) was obtained by the consumption of 24.14 g/l monosaccharide with $Y_{ABE}$ of 0.37 in pH 5.0.
Keywords
Undaria pinnatifida; hyper thermal acid hydrolysis; biobutanol; Clostridium sp.; pH-control;
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