Bioethanol production from rice straw by popping pretreatment

Collection with item attached
2013
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/475467.do
DOI
10.1186/1754-6834-6-166
Title
Bioethanol production from rice straw by popping pretreatment
Description
This work was supported by Priority Research Centers Program(2010-0020141) through the National Research Foundation of Korea (NRF)funded by the Ministry of Education, Science and Technology, and by agrant (S2113131L010120) from Forest Science & Technology Projects,Forest Service, Republic of Korea.
abstract
Background: Rice straw has considerable potential as a raw material for bioethanol production. Popping pretreatment of rice straw prior to downstream enzymatic hydrolysis and fermentation was found to increase cellulose to glucose conversion efficiency. The aim of this study was to investigate the influence of popping pretreatment and determine the optimal enzyme loading using a surface response design.
Results: The optimal doses of cellulase and xylanase enzymes were 23 FPU and 62 IU/g biomass, respectively. Using the optimized enzyme condition and popping pretreatment of rice straw (15% substrate loading, w/v), a sugar recovery of 0.567 g/g biomass (glucose; 0.394 g/g) was obtained in 48 h, which was significantly higher than that from untreated rice straw (total sugar recovery; 0.270 g/g biomass). Fermentation of the hydrolyzates by Saccharomyces cerevisiae resulted in 0.172 g ethanol/g biomass after 24 h, equivalent to 80.9% of the maximum theoretical yield (based on the amount of glucose in raw material). Changes in the chemical composition and surface area of rice straw were also investigated before and after popping pretreatment. The results showed little or no difference in chemical composition between the pretreated rice straw and the control. However, the surface area of pretreated rice straw increased twofold compared to the control.
Conclusion: Popping pretreatment of rice straw can effectively improve downstream saccharification and fermentation, important for bioethanol production.
provenance
Made available in Cube on 2018-09-28T11:13:36Z (GMT). No. of bitstreams: 0
language
English
author
Wi, Seung Gon
Choi, In Seong
Kim, Kyoung Hyoun
Kim, Ho Myeong
Bae, Hyeun-Jong
accessioned
2018-09-28T11:13:36Z
available
2018-09-28T11:13:36Z
issued
2013
citation
BIOTECHNOLOGY FOR BIOFUELS(6)
issn
1754-6834
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/475467.do
Funder
산림청
Funding Program
임업기술연구개발(보조포함)
Project ID
1405002014
Jurisdiction
Rep.of Korea
Project Name
산림자원 유래 첨단 바이오소재의 개발·응용 및 산업화연구
rights
openAccess
subject
Popping pretreatment
Rice straw
Bioethanol
Enzymatic hydrolysis
Fermentation
type
article


Files in This Item

There are no attached files.