Challenges and engineering application of landfill leachate concentrate treatment

Li, Qian; Cui, Hanlin; Li, Yihao; Song, Xiaoling; Liu, Wenzong; Wang, Yongxuan; Hou, Haimeng; Li, You; Wang, Fan; Song, Jian; Ye, Hanfeng; Song, Sirui; Che, Tong; Shao, Shuai; Kong, Deyong; Liang, Bin

doi:10.1016/j.envres.2023.116028

Cited by 17 publications

(1 citation statement)

References 79 publications

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“…After increasing the age of LL, the effluent becomes more complex, the biodegradability (BOD 5 /COD) decreases, and bio-refractory pollutants emerge, presenting challenges for the aforementioned treatment processes when used individually [27,28]. Frequently, a single treatment process fails to treat leachate from landfills to a level that meets the necessary standards for environmental release [19,29,30]. Therefore, Mojiri et al [19] and Jamrah et al [29] strongly recommend the implementation of a combination of chemical, biological, and physical treatment processes to achieve effective treatment outcomes.…”

Section: Introductionmentioning

confidence: 99%

An Extensive Analysis of Combined Processes for Landfill Leachate Treatment

Jamrah,

AL-Zghoul,

Al-Qodah

2024

Water

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Sanitary landfilling is the predominant process for solid urban waste disposal, but it generates leachate that poses environmental, economic, and social concerns. Landfill leachate (LL) contains complex and refractory pollutants and toxic compounds that can vary depending on landfill maturity, age, and biochemical reactions, making its treatment challenging. Due to its unique characteristics and occurrence in remote locations, LL requires separate treatment from wastewater. Various conventional treatment processes involving biological, chemical, and physical processes have been used for LL treatment, but a single treatment process is insufficient to meet environmental standards. This review demonstrates that combined treatment processes are more effective and efficient for LL treatment compared to single processes. Among the various combinations, chemical–chemical and chemical–biological treatments are the most commonly used. Specifically, the integration of Fenton with adsorption and a membrane bioreactor (MBR) with nanofiltration (NF) processes shows promising results. The combined processes of MBR with NF, Fenton with adsorption, and PF with biological treatment show maximum removal efficiencies for COD, reaching 99 ± 1%, 99%, 98%, and 97%, respectively. Additionally, the combined Fenton with adsorption process and EC with SPF process enhance biodegradability as indicated by increased BOD5/COD ratios, from 0.084 to 0.82 and 0.35 to 0.75, respectively. The findings emphasize the importance of developing and implementing enhanced combined treatment processes for LL, with the aim of achieving efficient and comprehensive pollutant mineralization. Such processes have the potential to address the environmental concerns associated with LL and contribute to sustainable waste management practices.

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Section: Introductionmentioning

confidence: 99%

An Extensive Analysis of Combined Processes for Landfill Leachate Treatment

Jamrah,

AL-Zghoul,

Al-Qodah

2024

Water

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Analytical Solutions for a Fully Coupled Hydraulic‐Mechanical‐Chemical Model With Nonlinear Adsorption

Han,

Zhang,

Zhou

2024

Num Anal Meth Geomechanics

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Adsorption characteristics play a crucial role in solute transport processes, serving as a fundamental factor for evaluating the performance of clay liners. Nonlinear adsorption isotherms are commonly found with metal ions and organic compounds, which introduce challenges in obtaining analytical solutions for solute transport models. In this study, analytical solutions are proposed for a fully coupled hydraulic‐mechanical‐chemical (HMC) model that accounts for both the Freundlich and Langmuir isotherms. To mitigate the difficulties arising from the variable coefficients, the system of second‐order partial differential equations involving three variables is linearized. The method of separation of variables, theory of integration, and Fourier series are utilized to derive analytical solutions. The analytical method presented can potentially be extended to a broad spectrum of nonlinear adsorption isotherms. The results reveal a 56.5% reduction in solute breakthrough time under the Freundlich isotherm and a remarkable 2.6‐fold extension under the Langmuir isotherm when compared to the linear isotherm. The adsorption constants of the Freundlich and Langmuir isotherms exhibit a positive correlation with breakthrough time, while the exponent of the Freundlich isotherm and the maximal adsorption capacity in the Langmuir isotherm demonstrate a negative association with breakthrough time. This study enhances the precision of solute transport prediction and provides a more scientific assessment of clay liner performance.

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Membranes in Landfill Leachate Treatment: Evaluation of the Generated Concentrate

de Almeida,

Campos

2024

Springer Water

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Challenges and engineering application of landfill leachate concentrate treatment

Cited by 17 publications

References 79 publications

An Extensive Analysis of Combined Processes for Landfill Leachate Treatment

An Extensive Analysis of Combined Processes for Landfill Leachate Treatment

Analytical Solutions for a Fully Coupled Hydraulic‐Mechanical‐Chemical Model With Nonlinear Adsorption

Membranes in Landfill Leachate Treatment: Evaluation of the Generated Concentrate

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