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Vol. 37 No. 11 (2025): Vol 37 Issue 11, 2025

Copyright (c) 2025 youssef GHERRABY, Younes Rachdi; Rajaa Bassam, amal Bassam; Rachid Cherouaki, Said Belaaouad

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

Assessment of Biological Treatment of Odorous Gas using a Bacterial Consortium (Bacillus and Pseudomonas) to Deodorize Landfill Leachate

https://doi.org/10.14233/ajchem.2025.34611
Youssef Gherraby
Laboratory of Physical Chemistry of Applied Materials, Faculty of Sciences Ben M’Sik, Hassan II University of Casablanca, B.P.7955, Bd Cdt Driss El Harti, Casablanca, Morocco
https://orcid.org/0000-0002-0126-8549
Younes Rachdi
Laboratory of Physical Chemistry of Applied Materials, Faculty of Sciences Ben M’Sik, Hassan II University of Casablanca, B.P.7955, Bd Cdt Driss El Harti, Casablanca, Morocco
https://orcid.org/0009-0003-1361-9064
Rajaa Bassam
Laboratory of Physical Chemistry of Applied Materials, Faculty of Sciences Ben M’Sik, Hassan II University of Casablanca, B.P.7955, Bd Cdt Driss El Harti, Casablanca, Morocco
https://orcid.org/0000-0001-8950-5301
Said Kerraj
Laboratory of Physical Chemistry of Applied Materials, Faculty of Sciences Ben M’Sik, Hassan II University of Casablanca, B.P.7955, Bd Cdt Driss El Harti, Casablanca, Morocco
https://orcid.org/0000-0002-0767-5225
Marouane El Alouani
Laboratory of Physico-Chemistry of Inorganic and Organic Materials, Materials Science Centre, Mohammed V University, Ecole Normale Superieure, Rabat, Morocco
https://orcid.org/0000-0003-4905-3720
Amal Bassam
Laboratory of Physical Chemistry of Applied Materials, Faculty of Sciences Ben M’Sik, Hassan II University of Casablanca, B.P.7955, Bd Cdt Driss El Harti, Casablanca, Morocco
https://orcid.org/0009-0005-4499-3889
El Hassane Mourid
Physical Chemistry of Materials Team, Cadi Ayyad University, Marrakech, Morocco
https://orcid.org/0000-0003-3030-6564
Badr Aouan
Laboratory of Physico-Chemistry of Inorganic and Organic Materials, Materials Science Centre, Mohammed V University, Ecole Normale Superieure, Rabat, Morocco
https://orcid.org/0000-0001-9400-6929
Mohamed Moussaoui
Laboratory of Physical Chemistry of Applied Materials, Faculty of Sciences Ben M’Sik, Hassan II University of Casablanca, B.P.7955, Bd Cdt Driss El Harti, Casablanca, Morocco
Rachid Cherouaki
Laboratory of Physical Chemistry of Applied Materials, Faculty of Sciences Ben M’Sik, Hassan II University of Casablanca, B.P.7955, Bd Cdt Driss El Harti, Casablanca, Morocco
Said Belaaouad
Laboratory of Physical Chemistry of Applied Materials, Faculty of Sciences Ben M’Sik, Hassan II University of Casablanca, B.P.7955, Bd Cdt Driss El Harti, Casablanca, Morocco
https://orcid.org/0000-0002-9815-0933

Corresponding Author(s) : Youssef Gherraby

youssef.gherraby-etu@etu.univh2c.ma

Asian Journal of Chemistry, Vol. 37 No. 11 (2025): Vol 37 Issue 11, 2025

Abstract

Leachate accumulation is a major concern for municipal solid waste (MSW) landfills as it causes potential harm to public health and poses a significant threat to surface water and local groundwater systems. This article presents the results of analyses on malodorous treatment at the solid waste landfill located in Casablanca, Morocco, using bio-deodorization as a pre-treatment technology. The main goal of this study is to remove odorous gases from landfill leachate. Microbial strains of Bacillus and Pseudomonas were seeded in a leachate pond to treat the odorous emissions from landfill leachate and consequently improve environmental quality and human health. After 28 days of seeding, the results showed that the addition of Bacillus and Pseudomonas greatly reduced the concentration of chemical oxygen demand (COD), biological oxygen demand (BOD5) and the ionic concentration of NH4+ to approximately 27.928 mg/L, 11550.3 mg/L and 1533 mg/L, respectively, with lower energy consumption, resulting in an average overall operational cost of 53.97 USD/m3. In addition, a significant reduction in total nitrogen (32.80%), nitrites (NO2–) (99.82%), nitrates (NO3–) (46.81%) and total phosphorus (49.50%) concentrations was also achieved at a post-treatment environmental pH of 8.5. These findings extend the field of application of biological deodorization and provide new insights into malodorous treatment methods.

Keywords

Bio-deodorization Health risk-reducing Landfill leachate Low-cost Odorous flavour attenuation
(1)
Gherraby, Y.; Rachdi, Y.; Bassam, R.; Kerraj, S.; El Alouani, M.; Bassam, A.; Mourid, E. H.; Aouan, B.; Moussaoui, M.; Cherouaki, R. Assessment of Biological Treatment of Odorous Gas Using a Bacterial Consortium (Bacillus and Pseudomonas) to Deodorize Landfill Leachate. ajc 2025, 37, 2794-2802.
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