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Performance evaluation of Anaerobic–Aerobic Hybrid Baffled Reactor Coupled with an Anaerobic Filter treating Landfill Leachate

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Abstract

The Anaerobic Baffled Reactor (ABR) is an effective solution for landfill leachate treatment using an anaerobic fermentation process, which helps to reduce operating costs and sludge volume. To better understand the biological, chemical, and physical processes involved, especially when combining the ABR with an aerobic component, the study aimed to investigate the performance of an Anaerobic–Aerobic Hybrid Baffled Reactor (AABR) that includes an Anaerobic Filter (AF) for treating landfill leachate. This research utilized two glass reactors. The first reactor, designated as AABR-AF, consisted of six independent rectangular glass chambers arranged side by side. The third and sixth chamber designed for aerobic treatment and AF, respectively. The second reactor was used as a control reactor and did not include any aerobic chamber. The highest Removal Efficiencies (REs) for turbidity, COD, BOD, TP, TKN, nitrate, TOC, and TSS in the AABR-AF and ABR-AF were found to be (65.4% and 56.3%), (98.3% and 94.1%), (98.1% and 93.2%), (86.4% and 65%), (89.2% and 76.7%), (81.2% and 64.4%), (88.2% and 79.4%), and (72.4% and 68.5%), respectively. These optimal REs were achieved at an HRT of 48 h and an OLR of 10 kg/m3.d. Also, the highest and the lowest REs in Heavy Metals (HMs) were 89.57% for manganese in AABR-AF and 6.59% for nickel in ABR-AF, in an OLR of 10 kg/m3.d, respectively. The effective removal of Organic Matters (OMs) from landfill leachate using the AABR-AF and ABR-AF was found to be strongly influenced by HRT and OLR. The AABR-AF configuration, featuring a single aerobic chamber in the reactor, exhibited a higher efficiency in removing OMs compared to the ABR-AF configuration.

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Acknowledgements

This article is a research project and thesis of Mrs. Fatemeh Mortezazadeh, approved by the Vice Chancellor of Research and Technology of Mazandaran University of Medical Sciences (Approval code: 10212).

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The authors thank to the Deputy of Research and Technology of Mazandaran University of Medical Sciences for their financial support.

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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by [Zabihollah Yousefi, Esmaeil Babanezhad, Yalda Hashempour, Reza Ali Mohammadpour, and Fatemeh Mortezazadeh]. The first draft of the manuscript was written by [Fatemeh Mortezazadeh] and subsequent versions were reviewed, revised and approved by all authors.

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Correspondence to Fatemeh Mortezazadeh.

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Yousefi, Z., Babanezhad, E., Hashempour, Y. et al. Performance evaluation of Anaerobic–Aerobic Hybrid Baffled Reactor Coupled with an Anaerobic Filter treating Landfill Leachate. Environ Sci Pollut Res 31, 28062–28076 (2024). https://doi.org/10.1007/s11356-024-32954-2

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  • DOI: https://doi.org/10.1007/s11356-024-32954-2

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