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2020 Vol.52, Issue 2 Preview Page
The Effects of Mild Alkaline Pretreatment on the Enzymatic Hydrolysis of Eucalyptus pellita Wood
Soodeh Zhand1
,
Bong Suk Yang2
,
Kyu-Young Kang3
,
Myung-Joon Jeong4†
1Dept. of Wood Science & Technology, College of Agricultural Life Science, Jeonbuk National University, Jeonju, 54896, Republic of Korea, Student
2Dept. of Biological and Environmental Science, College of Life Science and Biotechnology, Dongguk University, Seoul, 04620, Republic of Korea, Post-doctoral Research Fellow
3Dept. of Biological and Environmental Science, College of Life Science and Biotechnology, Dongguk University, Seoul, 04620, Republic of Korea, Professor
4Dept. of Wood Science & Technology, College of Agricultural Life Science, Jeonbuk National University, Jeonju, 54896, Republic of Korea, Professor
†Corresponding author: E-Mail: mjeong@jbnu.ac.kr (Address: Dept. of Wood Science & Technology, College of Agricultural Life Science, Jeonbuk National University, Jeonju, 54896, Republic of Korea)
30 April 2020. pp. 70-77
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Abstract

In this study, a dilute alkaline pretreatment (sodium carbonate and calcium hydroxide mixture) was evaluated for saccharification of extruded Eucalyptus wood. The hydroxide ions produced by the alkaline combination is remarkably more effective than using the alkaline compounds individually. Three critical factors for the simultaneous pretreatment and saccharification process, such as the pretreatment time, temperature, and molar concentration of Na2CO3:Ca(OH)2, were optimized to maximize bio sugar yield. The results show that although the lignin amount of hardwoods (i.e., Eucalyptus) is high (34.8%), but it is possible to overcome the recalcitrant of wood and improve glucose yields by employing this combined pretreatment (mechanical and chemical). The results also show that the glucose conversion by the enzyme was improved by approximately 14% for every 10% increase in delignification rate. However, simultaneously, the yield of glucose was reduced by approximately 7% during every 10% increase in delignification rate during alkaline pretreatment. This study indicated that mild sodium carbonate and calcium hydroxide pretreatment effectively reduced biomass recalcitrance and subsequently improved the digestibility of lignocellulosic biomass.

Keywords
Saccharification
alkaline pretreatment
glucose yield
sodium carbonate and calcium hydroxide
References

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Information
  • Publisher :Korea Technical Association of The Pulp and Paper Industry
  • Publisher(Ko) :한국펄프종이공학회
  • Journal Title :Journal of Korea TAPPI
  • Journal Title(Ko) :펄프종이기술
  • Volume : 52
  • No :2
  • Pages :70-77
  • Received Date : 2020-03-25
  • Revised Date : 2020-04-16
  • Accepted Date : 2020-04-20
  • DOI :https://doi.org/10.7584/JKTAPPI.2020.04.52.2.70
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