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Life cycle assessment of integrated hydrothermal liquefication of food waste with biological process toward bio-oil production

  • Tengfei Wang*
  • , Yashan Dai
  • , Hongru Shang
  • , Buchun Si
  • , Olga Sanginova
  • , Yanling Yu*
  • *Corresponding author for this work
  • Harbin Institute of Technology
  • Southwest Jiaotong University
  • Tongji University
  • School of Chemistry and Chemical Engineering, Harbin Institute of Technology
  • China Agricultural University
  • National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute"

Research output: Contribution to journalArticlepeer-review

Abstract

This study evaluated the environmental impact of three food waste hydrothermal liquefaction (HTL) scenarios integrated with bio-processing units. Scenario 2, which involved dark fermentation followed by HTL, produced the highest bio-oil yield and quality but also had the greatest environmental impact due to increased carbon emissions. Scenario 3, which combined HTL with anaerobic digestion, showed the most favorable environmental outcomes by effectively treating wastewater and generating biogas, making it the most sustainable option. Scenario 1, involving only HTL and wastewater treatment, had a lower environmental impact but yielded lower-quality bio-oil. Overall, scenario 3 is recommended for its balance between environmental sustainability and resource efficiency.

Original languageEnglish
Pages (from-to)14075-14088
Number of pages14
JournalBiomass Conversion and Biorefinery
Volume15
Issue number9
DOIs
StatePublished - May 2025

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 7 - Affordable and Clean Energy
    SDG 7 Affordable and Clean Energy
  2. SDG 8 - Decent Work and Economic Growth
    SDG 8 Decent Work and Economic Growth
  3. SDG 12 - Responsible Consumption and Production
    SDG 12 Responsible Consumption and Production

Keywords

  • Bio-oil
  • Food waste
  • Hydrothermal liquefaction
  • Life cycle assessment

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