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Valorizing Assorted Logging Residues: Response Surface Methodology in the Extraction Optimization of a Green Norway Spruce Needle-Rich Fraction To Obtain Valuable Bioactive Compounds

  • 0Production Systems, Natural Resources Institute Finland (Luke), Latokartanonkaari 9, FI-00790 Helsinki, Finland.
Acs Sustainable Resource Management +

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February 28, 2024

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February 28, 2024

View abstract on PubMed

Summary

This summary is machine-generated.

This study optimizes pressurized extraction of spruce logging residues using four solvents. It unlocks value-added applications for forest byproducts beyond just energy generation.

Area Of Science

  • Biorefinery Science
  • Forestry Byproduct Valorization
  • Green Chemistry

Background

  • Logging residues, primarily spruce needles, are abundant but underutilized forest byproducts.
  • Current industrial processing methods for these residues are limited, mainly focusing on energy generation.
  • There is a need for efficient methods to extract valuable compounds from logging residues for diverse applications.

Purpose Of The Study

  • To optimize pressurized liquid extraction of needle-rich spruce logging residues using four different solvents.
  • To identify the ideal extraction conditions (temperature and time) for maximizing the yield and quality of extracted compounds.
  • To explore the potential of these extracts for applications beyond energy generation, such as in pharmaceuticals or nutraceuticals.

Main Methods

  • Response surface methodology was employed to optimize extraction parameters.
  • Pressurized liquid extraction was performed on spruce logging residues using water, aqueous ethanol, water with Na2CO3 + NaHSO3, and limonene.
  • Evaluated responses included extraction yield, total dissolved solids (TDS), antioxidant activity (FRAP, ORAC, CUPRAC, DPPH), antibacterial properties, total phenolic content (TPC), condensed tannin content, and degree of polymerization.

Main Results

  • Optimal extraction conditions were determined for each solvent, with specific temperature and time parameters identified.
  • The study successfully demonstrated the feasibility of extracting valuable compounds from spruce logging residues.
  • Desirability surfaces were generated, indicating statistically significant and reliable optimization results (R² > 0.7, p ≤ 0.05).

Conclusions

  • The optimized extraction processes provide a viable pathway for the industrial utilization of spruce logging residues.
  • This research contributes to the development of biorefinery strategies for sustainable forest resource management.
  • The findings support the valorization of logging residues into high-value products, reducing waste and creating new economic opportunities.