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Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids
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Novel system design for high solid lignocellulosic biomass conversion.

Haider Jawad Kadhum1, Ganti S Murthy2

  • 1Department of Biological and Ecological Engineering, Oregon State University, Corvallis, OR 97331, United States; College of Agriculture, Al-Qasim Green University, Babylon, Iraq.

Bioresource Technology
|February 27, 2022
PubMed
Summary
This summary is machine-generated.

A new high-solids reactor (OSU-HSR) efficiently converts wheat straw into biofuels. The simultaneous saccharification and fermentation method yielded higher ethanol concentrations and improved economic returns.

Keywords:
Biofuels and BiochemicalsHydrolysis and FermentationLife Cycle AssessmentLignocellulosic biomassReactor designTechno-economic Analysis

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Area of Science:

  • Biochemical Engineering
  • Renewable Energy
  • Biomass Conversion

Background:

  • Enzymatic hydrolysis of lignocellulosic biomass is crucial for biofuel production.
  • Achieving high product concentrations at ultrahigh solids content presents mixing challenges.

Purpose of the Study:

  • To design and evaluate a novel ultrahigh solids reactor (OSU-HSR) for efficient enzymatic hydrolysis.
  • To compare separate hydrolysis and fermentation (SHF) with simultaneous saccharification and fermentation (SSF) for biofuel production.

Main Methods:

  • Development of the Oregon State University High Solids Reactor (OSU-HSR) with a horizontal design, low-energy impeller, and controllable feeding.
  • Evaluation of SHF and SSF processes using dilute acid pretreated wheat straw at 40% solids content.

Main Results:

  • The OSU-HSR achieved high glucose (219.7 g/L) and ethanol (127.1 g/L) concentrations using SHF.
  • The SSF method resulted in the highest ethanol concentration (134.5 g/L), increased return on investment (12.21%), and reduced global warming potential (54.5 g CO2 eq/MJ Ethanol).

Conclusions:

  • The OSU-HSR system effectively addresses mixing challenges at ultrahigh solids content.
  • SSF offers a more economically viable and environmentally friendly approach for lignocellulosic biomass conversion into biofuels.