American Journal of Chemical Engineering

Submit a Manuscript

Publishing with us to make your research visible to the widest possible audience.

Propose a Special Issue

Building a community of authors and readers to discuss the latest research and develop new ideas.

Comparative Study of Leachate Treatment by Combined System

Leachate from landfill requires treatment before discharge into the environment to avoid surface and underground water contamination. In this paper, the treatment performance of combined system by physico-chemical and biological techniques for landfill leachate are studied, the biological treatment by Sequencing Batch Reactor (SBR), the coagulation-flocculation and the filtration-fly ash. Both coagulation-floculation and treatment biologique by Sequencing Bach Reactor are effective for over 98,07% COD removal, 99,16% BOD5, a removal rate of 96,14% for NH4, 79,82% for NO3-, 97,32% for NO2-, 89,09% for suspended solids (SS) and 87,71% for PO4. A combination of physical and biological treatments has demonstrated its effectiveness for the treatment of intermediate leachate. Almost complete removal of COD and nitrogenous forms has been accomplished by a combination of biological treatment by SBR and physical treatment by filtration with COD concentration of 5200 mg/L and BOD5 concentration of 1375,12 mg/L. It is important to note that the selection of the most suitable treatment method for landfill leachate depends on the characteristics of landfill leachate, technical applicability and constraints, effluent discharge alternatives, cost-effectiveness, regulatory requirements and environmental impact. As a whole, a combination of two treatments proves to be more efficient and effective than individual treatment. This could be because a two-step treatment has the ability to synergize the advantages of individual treatments, while overcoming their respective limitations. A combined treatment is indeed capable of improving the effluent quality and minimizing the residue generated than an individual treatment.

Combined Treatment, Landfill Leachate, SBR, Coagulation-Floculation, Filtration

APA Style

Hanane El Fadel, Mohammed Merzouki, Mohamed Benlemlih. (2023). Comparative Study of Leachate Treatment by Combined System. American Journal of Chemical Engineering, 11(3), 46-51.

ACS Style

Hanane El Fadel; Mohammed Merzouki; Mohamed Benlemlih. Comparative Study of Leachate Treatment by Combined System. Am. J. Chem. Eng. 2023, 11(3), 46-51. doi: 10.11648/j.ajche.20231103.11

AMA Style

Hanane El Fadel, Mohammed Merzouki, Mohamed Benlemlih. Comparative Study of Leachate Treatment by Combined System. Am J Chem Eng. 2023;11(3):46-51. doi: 10.11648/j.ajche.20231103.11

Copyright © 2023 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License ( which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

1. Khattabi H., Aleya L and Mania J. Natural lagooning of landfill leachate. Revue des sciences de l’eau, Rev. Sci. Eau, 15 (2002) 411-419.
2. Boyle W. C and Ham R. K. Biological treatability of landfill leachate. Wat. Res. Poll. Cont. Fed, 46 (1974) 860-872.
3. Knox K. Treatability studies on leachate from a co-disposal landfill. Environ. Poll., (series B), 5 (1983) 157-174.
4. Knox K. Leachate treatment with nitrification of ammonia. Wat. Res., 19 (1983) 595-904.
5. Pedersen B. M., Jansen J. I. A. C. Treatment of leachate- polluted ground water in an aerobic biological filter Euro. Water. poll. control., 2 (1992) 40-45.
6. Spengel D. B and Dzombak D. A. Treatment of landfill leachate with rotating biological contractors. Res. J. WPFC, 63 (1991) 971-981.
7. X. Z. Li, Q. L. Zhao, MAP precipitation from landfill leachate and seawater bitter waste, Environ, Technol. 23 (2002) 989-1000.
8. H. Alvarez-Vazquez, B. Jefferson, S. J. Judd, Membrane bioreactors vs conventional biological treatment of landfill leachate: a brief review, J. Chem. Technol, Biotechnol, 79 (2004) 1043-1049.
9. A. Uygur, F. Karg. Biological nutrient removal from pretreated landfill leachate in a sequencing batch reactor, J. Environ. Manage. 71 (2004) 9-14.
10. Génie et modélisation des bioprocédés de l’environnement I. Séminaire: Sequencing batch reactor. Ecole polytechnique fédérale de Lausanne. CT. 2004.
11. Mouchet P. B. Traitement des eaux avant utilisation. Matières particulaire; Techniques de l’Ingénieur, traité Environnement. (2004).
12. Silva A. C., Dezotti M and Sant’Anna Jr G. L. Treatment and detoxication of a sanitary landfill leachate, Chemosphere. 55 (2004) 207-214.
13. Amokrane A., Comel C and Veron J. Landfill leachates pretreatment by coagulationflocculation, Water Res. 31 (1997) 2775-2782.
14. Laconi C. D., Lopez A., Ramadori R., Di pinto A. C and Passino R. Combined chemical and biological degradation of tannery wastewater by a periodic submerged filter (SBBR) (2002).
15. Ehrig H. J. Treatment of sanitary landfill leachate: Biological treatment, Waste. Manage. Res. 2 (1984) 131-152.
16. G. M. Ayoub, L. Semerjian, A. Acra, M. El Fadel, B. Koopman, Heavy metal removal by coagulation with seawater liquid bittern, J. Environ. Eng. 127 (2001) 196-202.
17. J. Rodier, L’analyse de l’eau, Contrôle et interprétation (2016).
18. E. Diamadopoulos, Characterization and treatment of recirculation stabikized leachate, Water Res. 28 (1994) 2439-2445.
19. Merzouki M. Thèse de doctorat d’Etat « Déphosphoration anoxique d’effluents par voie biologique: Optimisation et mise en œuvre d’un procédé intégré de dépollution azotée et phosphorée. (2001).
20. Roberston L. A., Cornelisse R., De Vos P., Hadioetomo R and Kuenen J. G. Aérobic denitrification in various heterotrophic nitrifiers. Antonie van Leeuwenhoek, 56 (1989) 289-299.
21. Colliver B. B and Stephenson T. Production of nitrogen oxide and dinitrogen oxide by autotrophic nitrifiers. Biotechnology Advances, 18 (2000) 219-232.
22. Hu T. L and Kung K. T. Study of heterotrophic nitrifying bacteria from wastewater treatment Systems treating acrylonitrile, butadiene and styrene resin wastewater. Water Science and Technology, 42 (2000) 315-321.
23. Zumft W. G. Cell biology and molecular basis of denitrification. Microbiology and Molecular Biology Reviews, 61 (4) (1997) 533-616.
24. Bothe H., Jost G., Schloter M., Ward B. B and Witzel K. P. Molecular analysis of ammonia oxidation and denitnfication in natural environments. FEMS Microbiology Reviews, 24 (2000) 673-690.
25. Xu G., Shi X. Characteristics and applications of fly ash as a sustainable construction material: A state of the art review, Resources, conservation and recycling, 136 (2018) 95-109.
26. EL Fadel H, Merzouki M, Laamayem A, Benlemlih M. Comparative study of the metal pollution treatment from leachates by physical and biological methods. J. Mater. Environ. Sci., volume 13, Issue 04 (2022) 391-408.
27. Backhouse, T. C., Bolliger, A. Australian marsupial trichosurus, 41 (1987) 435–464.