Improving Sugar Yields and Reducing Enzyme Loadings in the Deacetylation and Mechanical Refining (DMR) Process through Multistage Disk and Szego Refining and Corresponding Techno-Economic Analysis

Xiaowen Chen, Wei Wang, Peter Ciesielski, Olev Trass, Sunkyu Park, Ling Tao, Melvin P. Tucker

Research output: Contribution to journalArticlepeer-review

41 Scopus Citations

Abstract

Deacetylation and mechanical refining (DMR) has the potential to be a highly efficient biochemical conversion process for converting biomass to low toxicity, high concentration sugar streams. To increase the cost-effectiveness of the DMR process, improvements in enzymatic sugar yields are needed, in addition to reducing the refining energy consumed, and decreasing the enzyme usage. In this study, a second refining step utilizing a Szego mill was introduced, resulting in significant improvements in sugar yields in enzymatic hydrolysis at equivalent or lower refining energy inputs. The multistage DMR process increased the monomeric glucose and xylose yields to approximately 90% and 84%, respectively, with an energy consumption of 200 kWh/ODMT. SEM imaging revealed that Szego milling caused significant surface disruption and severe maceration and delamination of the biomass structure. Our results show that the DMR process is a very promising process for the biorefinery industry in terms of economic feasibility.

Original languageAmerican English
Pages (from-to)324-333
Number of pages10
JournalACS Sustainable Chemistry and Engineering
Volume4
Issue number1
DOIs
StatePublished - 4 Jan 2016

Bibliographical note

Publisher Copyright:
© 2015 American Chemical Society.

NREL Publication Number

  • NREL/JA-5100-64773

Keywords

  • Alkaline pretreatment
  • Biorefinery
  • Deacetylation
  • Disk refining
  • Ethanol
  • Mechanical refining
  • Sugar
  • Szego milling
  • Techno-economic analysis

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