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Cellulosic bioethanol production from Jerusalem artichoke (Helianthus tuberosus L.) using hydrogen peroxide-acetic acid (HPAC) pretreatment
- Song, Younho, Wi, Seung Gon, Kim, Ho Myeong, Bae, Hyeun-Jong
- Bioresource technology 2016 v.214 pp. 30-36
- Helianthus tuberosus, Jerusalem artichokes, Saccharomyces cerevisiae, biomass production, energy crops, enzymatic hydrolysis, ethanol production, fermentation, hydrogen, hydrolysates, lignin, polygalacturonase, xylanases
- Jerusalem artichoke (JA) is recognized as a suitable candidate biomass crop for bioethanol production because it has a rapid growth rate and high biomass productivity. In this study, hydrogen peroxide-acetic acid (HPAC) pretreatment was used to enhance the enzymatic hydrolysis and to effectively remove the lignin of JA. With optimized enzyme doses, synergy was observed from the combination of three different enzymes (RUT-C30, pectinase, and xylanase) which provided a conversion rate was approximately 30% higher than the rate with from treatment with RUT-C30 alone. Fermentation of the JA hydrolyzates by Saccharomyces cerevisiae produced a fermentation yield of approximately 84%. Therefore, Jerusalem artichoke has potential as a bioenergy crop for bioethanol production.