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Ethanol production from lignocellulosic waste materials: kinetics and optimization studies
Naeemah A Ibrahim1, Halah Hameed Majeed1, Rand A Abid1
1Southern Technical University Basra Iraq.
RSC Advances
|July 23, 2025
Summary
Sugarcane bagasse and rice husk are ideal feedstocks for bioethanol production. Optimized enzymatic hydrolysis and fermentation achieved high ethanol yields, supporting large-scale feasibility.
Area of Science:
- Biotechnology
- Biochemical Engineering
- Renewable Energy
Background:
- Lignocellulosic materials are abundant biomass resources.
- Efficient conversion of lignocellulose to ethanol is crucial for sustainable energy.
- Enzymatic hydrolysis and microbial fermentation are key bioprocesses.
Purpose of the Study:
- To investigate and optimize ethanol production from ten lignocellulosic materials.
- To evaluate enzymatic hydrolysis using *Trichoderma reesei* and *Aspergillus niger*.
- To assess fermentation by *Zymomonas mobilis* and *Saccharomyces cerevisiae*.
Main Methods:
- Compositional analysis of lignocellulosic feedstocks.
- Enzymatic hydrolysis and response surface methodology (RSM) for optimization.
- Fermentation studies using selected microbial strains.
- Application of kinetic models (Monod, Michaelis-Menten).
Main Results:
- Sugarcane bagasse and rice husk identified as optimal feedstocks.
- Highest glucose yields obtained from sugarcane bagasse (*T. reesei*) and rice husk (*A. niger*).
- Pretreatment and particle size reduction significantly enhanced ethanol yields (e.g., 9.3 g L-1 from rice husk).
Conclusions:
- Optimized conditions led to maximum ethanol yields.
- Kinetic parameters were determined for microbial strains.
- The study demonstrates the feasibility of large-scale bioethanol production from lignocellulosic biomass.
