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Bioresour Technol. 2017 Jul;236:194-201. doi: 10.1016/j.biortech.2017.03.143. Epub 2017 Mar 28.

Production of bio-sugar and bioethanol from coffee residue (CR) by acid-chlorite pretreatment.

Author information

1
Bio-Energy Research Center, Chonnam National University, Gwangju 61186, Republic of Korea.
2
Department of Agricultural Biology, RDA, National Academy of Agriculture Sciences, Wanju 55365, Republic of Korea.
3
College of Life and Resource Science, Dankook University, Cheonan 31116, Republic of Korea.
4
Bio-Energy Research Center, Chonnam National University, Gwangju 61186, Republic of Korea; Department of Bioenergy Science and Technology, Chonnam National University, Gwangju 61186, Republic of Korea. Electronic address: baehj@chonnam.ac.kr.

Abstract

Nowadays, coffee residue (CR) after roasting is recognized as one of the most useful resources in the world for producing the biofuel and bio-materials. In this study, we evaluated the potential of bio-sugar and bioethanol production from acid-chlorite treated CR. Notably, CR treated three times with acid-chlorite after organic solvent extraction (OSE-3), showed the high monosaccharide content, and the efficient sugar conversion yield compared to the other pretreatment conditions. The OSE-3 (6% substrate loading, w/v) can produce bio-sugar (0.568g/g OSE-3). Also, simultaneous saccharification and fermentation (SSF) produced ethanol (0.266g/g OSE-3), and showed an ethanol conversion yield of 73.8% after a 72-h reaction period. These results suggest that acid-chlorite pretreatment can improve the bio-sugar and bioethanol production of CR by removing the phenolic and brown compounds.

KEYWORDS:

Acid-chlorite pretreatment; Bio-sugar; Bioethanol; Coffee residue; Simultaneous saccharification and fermentation (SSF)

PMID:
28411491
DOI:
10.1016/j.biortech.2017.03.143
[Indexed for MEDLINE]

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