Overall
- Language
- english
- Conflict of Interest
- In relation to this article, we declare that there is no conflict of interest.
- Publication history
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Received April 26, 2023
Revised June 1, 2023
Accepted June 4, 2023
- Acknowledgements
- This work was supported by Motilal Nehru National Institute of Technology and Netaji Subhas University of Technology, New Delhi.
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Most Cited
Alkaline Peroxide Pretreatment of Waste Lignocellulosic Sawdust for Total Reducing Sugars
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Abstract
The surge in the oil prices, increasing global population, climate change, and waste management
problems are the major issues which have led to the development of biofuels from lignocellulosic wastes. Cellulosic
or second generation (2G) bioethanol is produced from lignocellulosic biomass via pretreatment, hydrolysis, and
fermentation. Pretreatment of lignocellulose is of considerable interest due to its influence on the technical, economic
and environmental sustainability of cellulosic ethanol production. In this study, furniture waste sawdust was subjected
to alkaline peroxide (H2O2) for the production of reducing sugars. Sawdust was pretreated at different concentrations
from 1-3% H2O2 (v/v) loadings at a pH of 11.5 for a residence time of 15-240 min at 50, 75 and 90 ℃. Optimum
pretreatment conditions, such as time of reaction, operating temperature, and concentration of H2O2, were varied and
evaluated on the basis of the amount of total reducing sugars produced. It was found that the changes in the amount
of lignin directly affected the yield of reducing sugars. A maximum of 50% reduction in the lignin composition was
obtained, which yielded a maximum of 75.3% total reducing sugars yield and 3.76 g/L of glucose. At optimum
pretreatment conditions of 2% H2O2 loading at 75 ℃ for 150 min, 3.46 g/L glucose concentration with a 69.26% total
reducing sugars yield was obtained after 48 hr. of the hydrolysis process. Pretreatment resulted in lowering of
crystallinity and distortion of the sawdust after the pretreatment, which was further confirmed by XRD and SEM
results.
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