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Chemistry in Industry : Journal of Chemists and Chemical Engineers of Croatia, Vol. 71 No. 1-2, 2022.

Original scientific paper

https://doi.org/10.15255/KUI.2021.015

Olive Mill Wastewater for Bioethanol Production using Immobilised Cells

Khadidja Ayadi ; Laboratoire Eau et Environnement, Faculté de Technologie, Université Hassiba Benbouali de Chlef, Alžir
Malika Meziane ; Laboratoire Bio-Ressources Naturelles, Faculté des Sciences de la Nature et de la Vie, Université Hassiba Benbouali de Chlef, Alžir
Djawed Rouam ; Laboratoire Bio-Ressources Naturelles, Faculté des Sciences de la Nature et de la Vie, Université Hassiba Benbouali de Chlef, Alžir
Mohammed Noureddine Bouziane ; Laboratoire Bio-Ressources Naturelles, Faculté des Sciences de la Nature et de la Vie, Université Hassiba Benbouali de Chlef, Alžir
Khaled El-Miloudi orcid id orcid.org/0000-0002-3425-3474 ; Laboratoire Physique Théorique et Physique des Matériaux, Faculté de Technologie, Université Hassiba Benbouali de Chlef, Alžir

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Abstract

Physicochemical and microbiological characteristics of a local traditional olive mill wastewater, at Ennakhla-Chlef in northern Algeria, were evaluated. The olive mill wastewater samples had slight acidity of 0.65 % with a pH = 4.88, and electrical conductivity of 34 mS cm–1. The chemical oxygen demand (COD) and the biological oxygen demand (BOD5) reached up to 183 g l–1 and 7 g l–1, respectively. In addition, the samples showed 1.72 g l–1 of total phenolic compounds. Preliminary microbiological analysis of the wastewater showed the presence of various microorganisms represented especially by lactic acid bacteria and Enterococcus sp. to the aim of this work was to investigate the possibility of using yeast strains isolated from olive mill wastewater in the fermentation of the latter. The results shown that fermentation with yeast can produce ethanol at an extent of 1.4 % (v/v). This can constitute a strategy for treating mentioned wastewater and transforming it into valuable biomolecules.




This work is licensed under a Creative Commons Attribution 4.0 International License.

Keywords

olive mill wastewater; physicochemical parameters; microbial composition; immobilised cells fermentation; bioethanol

Hrčak ID:

271209

URI

https://hrcak.srce.hr/271209

Publication date:

17.1.2022.

Article data in other languages: croatian

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