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Insights on comprehensive characterization of distinct growth stages of Sterculia foetida pod as a potential feedstock for bioethanol production

  • 0Bioprocess Engineering Laboratory, Centre for Bioenergy, School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, Tamil Nadu, 613401, India.
Scientific Reports +

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May 2, 2025

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May 2, 2025

View abstract on PubMed

Summary

This summary is machine-generated.

Sterculia foetida pods, a non-edible biomass, were characterized and processed to produce bioethanol. This study demonstrates their potential as a sustainable feedstock for bioethanol production, overcoming feedstock diversity challenges in biorefineries.

Area Of Science

  • Biomass Valorization
  • Renewable Energy
  • Biofuel Production

Background

  • Lignocellulosic biomass offers a sustainable energy source but feedstock diversity complicates biorefining.
  • Non-edible Sterculia foetida pods present an alternative feedstock for bioethanol production.
  • Comprehensive characterization is crucial for optimizing biomass utilization.

Purpose Of The Study

  • To evaluate Sterculia foetida pod skins (green and brown) as feedstock for bioethanol production.
  • To comprehensively characterize the physicochemical properties of green-colored skin (GSFP) and brown-colored skin (BSFP).
  • To assess the potential of isolated cellulose from GSFP and BSFP for bioethanol generation.

Main Methods

  • Physicochemical, proximate, ultimate (CHNS) analyses, bulk density, and calorific value determination.
  • Spectroscopic and microscopic analyses: FTIR, TGA, SEM, and XRD for structural characterization.
  • Two-step acid hydrolysis of isolated cellulose to produce fermentable sugars, followed by bioethanol fermentation.

Main Results

  • Cellulose content ranged from 33.95% to 35.28% and lignin content from 17.37% to 20.79% in GSFP and BSFP.
  • Acid hydrolysis yielded fermentable sugars, leading to bioethanol concentrations of 0.91–18.78 g/L (GSFP) and 0.23–12.23 g/L (BSFP).
  • Specific bioethanol yields were recorded as 0.44–1.52 g/g for GSFP and 0.13–1.55 g/g for BSFP.

Conclusions

  • Sterculia foetida pod skins are a viable, non-edible lignocellulosic feedstock for bioethanol production.
  • The study provides a comprehensive understanding of the biomass characteristics and conversion efficiency.
  • This research contributes to diversifying sustainable feedstocks for the biorefinery industry.

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