Characterization of products from hydrothermal carbonization of orange pomace including anaerobic digestibility of process liquor

Ezgi Erdogan, Buse Atila, Jan Mumme, M. Toufiq Reza, Asli Toptas, Murat Elibol, Jale Yanik*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, the effect of the temperature and reaction time on hydrothermal carbonization (HTC) of orange pomace was investigated. In addition, a set of anaerobic batch tests were performed to determine the resulting biogas and methane potential of the spent liquor. Hydrochar yields followed a decreasing trend with the increasing temperature, whereas reaction time had no considerably effect on the yield. The evolution of the H/C and O/C atomic ratios from the raw material to the hydrochars suggested that dehydration reactions prevail during HTC. The hydrochars tended to become enriched in Ca, Mg and P minerals by increasing HTC temperature. The heavy metal contents in hydrochars were found below limits and no PAH compound was detected. Anaerobic digestion tests showed that the aqueous phase from HTC can be used as feedstocks for biogas production. (C) 2015 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)35-42
Number of pages8
JournalBioresource technology
Volume196
DOIs
Publication statusPublished - Nov 2015

Keywords

  • Hydrothermal carbonization
  • Orange pomace
  • Anaerobic digestion
  • Hydrochar
  • Biogas
  • PYROLYSIS TEMPERATURE
  • APPLE POMACE
  • MAIZE SILAGE
  • PEANUT SHELL
  • CITRUS PEEL
  • BIOMASS
  • BIOCHAR
  • CONVERSION
  • WATER
  • COMPONENTS

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