Multi-stage hydrothermal liquefaction modeling of sludge and microalgae biomass to increase bio-oil yield

Bhawna Bisht, Prateek Gururani, Shivam Pandey, Krishna Kumar Jaiswal, Sanjay Kumar, Mikhail S. Vlaskin, Monu Verma, Hyunook Kim, Vinod Kumar

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

This study aims to elucidate the effect of Multi-Stage HTL with a constant resident time of 30 min for three different feedstocks including kitchen wastewater sludge (KwWs), freshwater microalgae Chlorella sorokiniana (UUIND6), Co-HTL (KwWs + UUIND6) to obtain the maximum bio-oil yield. According to the results obtained, KwWs appears to be the most suitable for conversion into energy-dense bio-oil under a sustainable biorefinery approach for increased bio-oil yields i.e., 72.75 ± 0.37 wt%, with HHV of 40.52 MJ/kg and energy recovery of 53.64 wt%. Further, the bio-oils and bio-chars derived from different types of biomasses obtained at different temperature conditions were analyzed by GC–MS, NMR, FTIR, and Raman spectroscopy to identify variations in the bio-crude compounds.

Original languageEnglish
Article number125253
JournalFuel
Volume328
DOIs
StatePublished - 15 Nov 2022

Keywords

  • Chlorella sorokiniana
  • Co-HTL
  • Hydrothermal liquefaction
  • Microalgae
  • Sludge

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