Deconstructing recalcitrant Miscanthus with alkaline peroxide and electrolyzed water

Area of Science:

• Biomass Pretreatment
• Renewable Energy
• Biochemical Engineering

Background:

• Recalcitrant lignocellulosic biomass like Miscanthus presents challenges for efficient deconstruction.
• Effective pretreatment is crucial for unlocking cellulose for biofuel production.

Purpose of the Study:

• To develop and evaluate a two-stage pretreatment method for deconstructing Miscanthus.
• To improve cellulose accessibility and enzymatic digestibility.

Main Methods:

• A two-stage process involving alkaline peroxide followed by electrolyzed water treatment.
• Characterization using Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR).

Main Results:

• Achieved 95% cellulose digestibility with the two-stage method, surpassing conventional sulfuric acid pretreatment (81%).
• The first stage removed 63% hemicellulose and 64% lignin.
• SEM and FTIR confirmed partial cellulose exposure after the first stage and complete exposure with structural changes after the second stage.

Conclusions:

• The proposed two-stage pretreatment effectively deconstructs Miscanthus biomass.
• This method significantly enhances enzymatic cellulose digestibility, offering a promising route for biofuel applications.