Enhancement of Enzymatic Hydrolysis and Klason Lignin Removal of Corn Stover Using Photocatalyst-Assisted Ammonia Pretreatment
- Authors
- Yoo, Chang Geun; Wang, Chao; Yu, Chenxu; Kim, Tae Hyun
- Issue Date
- Mar-2013
- Publisher
- SPRINGER
- Keywords
- Lignocellulosic biomass; Titanium dioxide (TiO2); Zinc oxide (ZnO); Photo-degradation; Bioconversion
- Citation
- APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY, v.169, no.5, pp.1648 - 1658
- Indexed
- SCIE
SCOPUS
- Journal Title
- APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
- Volume
- 169
- Number
- 5
- Start Page
- 1648
- End Page
- 1658
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/28816
- DOI
- 10.1007/s12010-012-0002-4
- ISSN
- 0273-2289
- Abstract
- Photocatalyst-assisted ammonia pretreatment was explored to improve lignin removal of the lignocellulosic biomass for effective sugar conversion. Corn stover was treated with 5.0-12.5 wt.% ammonium hydroxide, two different photocatalysts (TiO2 and ZnO) in the presence of molecular oxygen in a batch reactor at 60 A degrees C. Various solid-to-liquid ratios (1:20-1:50) were also tested. Ammonia pretreatment assisted by TiO2-catalyzed photo-degradation removed 70 % of Klason lignin under the optimum condition (12.5 % ammonium hydroxide, 60 A degrees C, 24 h, solid/liquid = 1:20, photocatalyst/biomass = 1:10 with oxygen atmosphere). The enzymatic digestibilities of pretreated corn stover were 85 % for glucan and 75 % for xylan with NH3-TiO2-treated solid and 82 % for glucan and 77 % for xylan with NH3-ZnO-treated solid with 15 filter paper units/g-glucan of cellulase and 30 cellobiase units/g-glucan of beta-glucosidase, a 2-13 % improvement over ammonia pretreatment alone.
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