Characterization and bioremediation potential of byproducts from hydrothermal liquefaction of food wastes

Michael James Stablein, Aersi Aierzhati, Jamison Watson, Buchun Si, Yuanhui Zhang

Research output: Contribution to journalArticlepeer-review

Abstract

Hydrothermal Liquefaction is a thermochemical process that uses heat and pressure to convert biowastes into renewable biocrude oil, simultaneously generating both a metal and phosphorus rich solid phase and a nutrient rich aqueous phase. Eight types of food waste, all collected from a campus dining hall and grouped into lipid-rich, protein-rich, and carbohydrate-rich feedstocks, were processed with conditions ranging from 280–340 °C and 10–60 min reaction time. The byproducts for the optimized oil yield conditions were analyzed to elucidate mechanisms by which compounds are concentrated in different phases through their characterization. The differences in elemental and biochemical composition among feedstocks demonstrate considerable gaps in understanding the expected characteristics as a result of several reaction parameters and how to best reuse the materials. This work additionally reviews considerations for subsequent anaerobic digestion and algae cultivation with respect to the nutrients and inhibitory contents of the Hydrothermal Liquefaction Aqueous Phase.

Original languageEnglish (US)
Article number100555
JournalBioresource Technology Reports
Volume12
DOIs
StatePublished - Dec 2020

Keywords

  • Byproduct characterization
  • Food waste
  • Hydrothermal liquefaction
  • Nutrients availability

ASJC Scopus subject areas

  • Bioengineering
  • Renewable Energy, Sustainability and the Environment
  • Environmental Engineering
  • Waste Management and Disposal

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