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Hydrodynamic cavitation as an efficient pretreatment method for lignocellulosic biomass: A parametric study.
Ruly Terán Hilares1, Gabriela Faria de Almeida1, Muhammad Ajaz Ahmed2
1Department of Biotechnology, Engineering School of Lorena, University of São Paulo, CEP 12602-810, Brazil.
Bioresource Technology
|April 4, 2017
Summary
Hydrodynamic cavitation (HC) effectively pretreated sugarcane bagasse (SCB), yielding high cellulose and hemicellulose hydrolysis. Optimal conditions achieved significant results in a short time, demonstrating HC
Area of Science:
- Biomass Pretreatment
- Chemical Engineering
- Sustainable Energy
Background:
- Sugarcane bagasse (SCB) is an abundant lignocellulosic biomass.
- Efficient pretreatment is crucial for SCB valorization into biofuels and biochemicals.
- Hydrodynamic cavitation (HC) offers a promising, energy-efficient pretreatment method.
Purpose of the Study:
- To optimize hydrodynamic cavitation (HC) parameters for sugarcane bagasse (SCB) pretreatment.
- To maximize cellulose and hemicellulose hydrolysis yields.
- To evaluate the impact of HC operating conditions on SCB composition.
Main Methods:
- Response surface methodology (RSM) was employed to optimize HC parameters.
- Key parameters investigated: inlet pressure (1-3 bar), temperature (40-70°C), and alkaline concentration (0.1-0.3M NaOH).
- Orifice plates with varying hole numbers (16 and 27) were used to study cavitation intensity.
Main Results:
- Optimal conditions (3 bar, 70°C, 0.3M NaOH) yielded 93.05% cellulose and 94.45% hemicellulose hydrolysis within 30 minutes.
- Pretreatment time beyond 10 minutes showed diminishing returns on SCB composition changes.
- Higher hydrolysis yields were observed at 20 minutes of pretreatment time.
Conclusions:
- Hydrodynamic cavitation (HC) is a highly effective pretreatment method for sugarcane bagasse (SCB).
- Mild conditions and short treatment times can achieve high hydrolysis yields.
- HC pretreatment offers a sustainable pathway for SCB conversion.