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Bioprocess and Biosystems Engineering

, Volume 41, Issue 8, pp 1153–1163 | Cite as

Differential reinforcement of enzymatic hydrolysis by adding chemicals and accessory proteins to high solid loading substrates with different pretreatments

  • Jian Du
  • Wenxia Song
  • Xiu Zhang
  • Jian Zhao
  • Guodong Liu
  • Yinbo Qu
Research Paper

Abstract

High dosage of enzyme is required to achieve effective lignocellulose hydrolysis, especially at high-solid loadings, which is a significant barrier to large-scale bioconversion of lignocellulose. Here, we screened four chemical additives and three accessory proteins for their effects on the enzymatic hydrolysis of various lignocellulosic materials. The effects were found to be highly dependent on the composition and solid loadings of substrates. For xylan-extracted lignin-rich corncob residue, the enhancing effect of PEG 6000 was most pronounced and negligibly affected by solid content, which reduced more than half of enzyme demand at 20% dry matter (DM). Lytic polysaccharide monooxygenase enhanced the hydrolysis of ammonium sulfite wheat straw pulp, and its addition reduced about half of protein demand at the solid loading of 20% DM. Supplementation of the additives in the hydrolysis of pure cellulose and complex lignocellulosic materials revealed that their effects are tightly linked to pretreatment strategies.

Keywords

Lignocellulosic biomass Additives Accessory proteins Cellulose conversion High-solid enzymatic hydrolysis 

Notes

Acknowledgements

The study was supported by Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, Heilongjiang Bayi Agricultural University, China (No. 201715).

Compliance with ethical standards

Conflict of interest

The authors declare no competing financial interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Jian Du
    • 1
  • Wenxia Song
    • 2
  • Xiu Zhang
    • 1
  • Jian Zhao
    • 1
  • Guodong Liu
    • 1
  • Yinbo Qu
    • 1
  1. 1.State Key Laboratory of Microbial TechnologyShandong UniversityJinanChina
  2. 2.School of Life ScienceQufu Normal UniversityQufuChina

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