Environment-enhancing process for algal wastewater treatment, heavy metal control and hydrothermal biofuel production: A critical review

Hugang Li, Jamison Watson, Yuanhui Zhang, Haifeng Lu, Zhidan Liu

Research output: Contribution to journalReview article

Abstract

Coupling algae growth on wastewater with hydrothermal liquefaction (HTL) is regarded as an environment-enhancing pathway for wastewater management, biomass amplification, sustainable energy generation and value-added products generation. Through this integrated pathway, microalgae can not only recover nitrogen and phosphorus, but also absorb heavy metals from the wastewater. The migration and transformation of heavy metals need to be specifically assessed and considered due to the environmental concerns associated with metal toxicity. This work reviewed recent advances with respect to bioremediation mechanisms. Particular emphasis was placed on the heavy metal migration, transformation, and the key factors involved in algal wastewater treatment and biomass conversion. Additionally, the challenges of coupling algae wastewater treatment, hydrothermal conversion, and heavy metal control were addressed. Finally, a paradigm involving enhanced algal wastewater treatment and bioenergy production for field application was proposed.

Original languageEnglish (US)
Article number122421
JournalBioresource Technology
Volume298
DOIs
StatePublished - Feb 2020

Keywords

  • Algae
  • Biofuel
  • Heavy metal
  • Hydrothermal liquefaction
  • Wastewater treatment

ASJC Scopus subject areas

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

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