Olive mill wastewater: From a pollutant to green fuels, agricultural water source and bio-fertilizer. Biofuel production

Mejdi Jeguirim*, Mary Lorène Goddard, Andrius Tamosiunas, Emna Berrich-Betouche, Ahmed Amine Azzaz, Marius Praspaliauskas, Salah Jellali

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Olive mill wastewater (OMWW) management is recognized as the major defy that olive oil industry is facing. Recently, we have established an eco-friendly strategy for the OMWW conversion into irrigation water sources, green biofuels and biofertilizers. This work is a part of a series of papers detailing the different steps established in this environmental friendly strategy for OMWW management. It deals with the bio-oil production and characterization during the pyrolysis of OMWW impregnated on olive pomace (OP) in a pyrolyzer pilot. Results show a bio-oil production yield of 36 wt% during the pyrolysis test. This yield could be attributed to the recovery of organic compounds from OMWW through OP impregnation and their conversion to bio-oil. The bio-oil properties show that viscosity and flash point values could reach the European standards. However, the lower heating values (26 MJ/kg) and the acidic character limit its direct use. These values are attributed to the higher water and oxygen contents. The GC/MS analysis confirms these properties showing the presence of phenolic molecules and long chain organic acids. Therefore, OMWW impregnation on OP and pyrolysis could be considered as a promising issue for bio-oil production. However, this bio-oil requires an upgrading step for a better valorization.

Original languageEnglish
Pages (from-to)716-724
Number of pages9
JournalRenewable Energy
Volume149
DOIs
Publication statusPublished - Apr 2020

Keywords

  • Bio-oil
  • Diesel properties
  • GC-MS
  • Green fuel
  • Olive mill wastes
  • Pyrolysis

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment

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