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Applied Biochemistry and Biotechnology

, Volume 167, Issue 2, pp 358–366 | Cite as

Kinetic Studies on the Product Inhibition of Enzymatic Lignocellulose Hydrolysis

  • Yelian MiaoEmail author
  • Jie Yu Chen
  • Xuejian Jiang
  • Zhou Huang
Article

Abstract

In order to understand the product inhibition of enzymatic lignocellulose hydrolysis, the enzymatic hydrolysis of pretreated rice straw was carried out over an enzyme loading range of 2 to 30 FPU/g substrate, and the inhibition of enzymatic hydrolysis was analyzed kinetically based on the reducing sugars produced. It was shown that glucose, xylose, and arabinose were the main reducing sugar components contained in the hydrolysate. The mass ratio of glucose, xylose, and arabinose to the total reducing sugars was almost constant at 52.0 %, 29.7 % and 18.8 %, respectively, in the enzyme loading range. The reducing sugars exerted competitive inhibitory interferences to the enzymatic hydrolysis. Glucose, xylose, and arabinose had a dissociation constant of 1.24, 0.54 and 0.33 g/l, respectively. The inhibitory interferences by reducing sugars were superimposed on the enzymatic hydrolysis. The enzymatic hydrolysis could be improved by the removal of the produced reducing sugars from hydrolysate.

Keywords

Biomass Enzymatic hydrolysis Saccharification Product inhibition Kinetics 

Notes

Acknowledgments

This research project was financially supported by the grants of the National Natural Science Foundation of China and the People’s Government of Guangdong Province (U0733001), and the National Basic Research Program of China (973 Program, 2009CB724700).

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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • Yelian Miao
    • 1
    Email author
  • Jie Yu Chen
    • 2
  • Xuejian Jiang
    • 1
  • Zhou Huang
    • 1
  1. 1.State Key Laboratory of Materials-Oriented Chemical Engineering, College of Food Science and Light Industrial TechnologyNanjing University of TechnologyNanjingChina
  2. 2.Faculty of Bioresource ScienceAkita Prefectural UniversityAkitaJapan

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