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Recent Advancements in Microalgal Mediated Valorisation of Wastewater from Hydrothermal Liquefaction of Biomass

BioEnergy Research (2022)Cite this article

Abstract

Hydrothermal liquefaction (HTL) is an evolving technology that can convert waste with high moisture and low energy content to electricity, heat, hydrogen and other synthetic fuels more efficiently. The lee side is that the HTL process produces enormous amounts of wastewaters (HTWW), having high organic and nutrient load. The discharge of the HTWW would contaminate the environment and result in the loss of valuable bioenergy sources. The valorisation of HTWW has drawn considerable interest. Therefore, this review highlights the valorisation of wastewater during the HTL of biomass. The review paper begins with the discussion of the role of microalgae in valorizing the HTWW. The survey illustrates that the selection of appropriate technology is dependent on biomass characteristics of the microalgae. Finally, potential research opportunities are recommended to improve the viability of the HTL wastewater valorisation for bioenergy production. Overall, this review concludes that combining various processes, such as microalgae-anaerobic digestion, and bio-electrochemical system - microalgae-anaerobic digestion would be beneficial in maximizing HTWW valorisation.

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Acknowledgements

The authors are thankful to the Thapar Institute of Engineering and Technology (TIET) and Sheffield Hallam University for supporting this work.

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Authors and Affiliations

  1. Department of Biotechnology, Thapar Institute of Engineering and Technology, Patiala, 147001, Punjab, India

    Prangya Ranjan Rout & Nirmalya Halder

  2. Department of Engineering and Mathematics, Sheffield Hallam University, Sheffield, UK

    Mukesh Goel

  3. Department of Biotechnology, Dr. B. R. Ambedkar National Institute of Technology, Jalandhar, Punjab, India

    Anee Mohanty

  4. School of Computing and Engineering, University of Huddersfield, Huddersfield, UK

    Daya Shankar Pandey

  5. Energy Systems Catapult, Birmingham, UK

    Sanjay Mukherjee

  6. Department of Biological Engineering, Konkuk University, Seoul, 05029, Republic of Korea

    Shashi Kant Bhatia

  7. Department of Chemistry, Environmental Science Program - Institute of Technical Education and Research - Siksha ‘O’ Anusandhan, Bhubaneswar, 751030, Odisha, India

    Naresh Kumar Sahoo

  8. Gujarat Pollution Control Board, Gandhinagar, 382010, Gujarat, India

    Sunita Varjani

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  9. Sunita Varjani
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Contributions

PRR: Conceptualization, writing-original draft preparation. MG: Conceptualization, supervision, writing-original draft preparation. AM: Writing original draft preparation. DSP: Writing-reviewing and editing. NH: Writing-reviewing and editing. SM: Writing-reviewing and editing. SKB: Writing-reviewing and editing. NKS: Writing-reviewing and editing. SV: Conceptualization, supervision, final approval of the version to be submitted.

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Correspondence to Sunita Varjani.

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Rout, P.R., Goel, M., Mohanty, A. et al. Recent Advancements in Microalgal Mediated Valorisation of Wastewater from Hydrothermal Liquefaction of Biomass. Bioenerg. Res. (2022). https://doi.org/10.1007/s12155-022-10421-5

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Keywords

  • Hydrothermal liquefaction
  • Wastewater from HTL (HTWW)
  • Bioenergy
  • Microalgae
  • Valorisation