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Related Experiment Video

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Recent advances in black liquor valorization.

Raj Morya1, Madan Kumar2, Isha Tyagi2

  • 1Civil and Environmental Engineering Department, Yonsei University, Seoul 03722, Republic of Korea.

Bioresource Technology
|March 1, 2022
PubMed
Summary

Black liquor, a byproduct of lignocellulosic biomass processing, can be converted into valuable bioplastics, biohydrogen, and biogas. This review explores advanced biological and chemical methods for black liquor valorization, enhancing the sustainability of biorefineries.

Keywords:
Black liquor valorizationCarbon sequestrationLignocelluloseSustainability

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Area of Science:

  • Biotechnology and Bioengineering
  • Renewable Energy and Biomass Valorization
  • Green Chemistry and Sustainable Processes

Background:

  • Lignocellulosic biomass is a key renewable resource for fuels and chemicals, offering an alternative to petroleum.
  • Biomass pretreatment is essential for cellulose extraction, yielding a cellulose-rich solid and a black liquor byproduct.
  • Black liquor, containing lignin and hemicelluloses, is often discarded or used for energy recovery, representing a missed opportunity for value addition.

Purpose of the Study:

  • To review recent advancements in the biological and chemical valorization of black liquor.
  • To explore the conversion of black liquor into valuable products such as bioplastics, biohydrogen, and biogas.
  • To assess the potential of advanced chemical processes as alternatives to conventional energy recovery for improved biorefinery sustainability.

Main Methods:

  • Comprehensive literature review of recent research on black liquor bioconversion and chemical processing.
  • Analysis of biological pathways for producing bioplastics, biohydrogen, and biogas from black liquor.
  • Evaluation of advanced chemical processes and their modifications for black liquor valorization.

Main Results:

  • Significant progress has been made in the bioconversion of black liquor into bioplastics, biohydrogen, and biogas.
  • Emerging chemical processes offer promising alternatives to traditional energy recovery, with potential for higher value product generation.
  • The successful implementation of these advanced valorization strategies is crucial for the economic viability and environmental sustainability of lignocellulosic biomass industries.

Conclusions:

  • Black liquor represents a valuable, underutilized resource within the lignocellulosic biomass value chain.
  • Biological and chemical valorization pathways provide viable routes for producing biofuels and biochemicals, moving beyond simple energy recovery.
  • Further development and integration of these advanced technologies are essential for realizing the full potential of biorefineries and promoting a circular bioeconomy.