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Advanced Technologies in Landfills

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Ecology Science and Engineering".

Deadline for manuscript submissions: 20 April 2025 | Viewed by 2232

Special Issue Editors


E-Mail Website
Guest Editor
Geotechnical Engineering Research Institute, Hohai University, Nanjing 210024, China
Interests: landfill liner; municipal solid wastes; slope stability; pollutant transport; dredged silt

E-Mail Website
Guest Editor
Geotechnical Engineering Research Institute, Hohai University, Nanjing 210024, China
Interests: MSW landfills; soil remediation

Special Issue Information

Dear Colleagues,

Over the past few decades, the rapid increase in the global annual production of solid wastes has occupied large areas of land, with its increasing rate exceeding the growth rate of treatment capacity. The solid wastes usually have scattered sources, large production, complex composition, variable forms and properties, and may contain hazardous materials or pollutants, leading to harmful effects on the environment and public health. Up to now, sanitary landfills have been the main method of solid waste disposal all around the world. There are currently hundreds of thousands of active, closed, and abandoned landfills worldwide, all associated with potential environmental risks. Advanced landfill technologies have been developed to ensure the safe and stable operation of landfills, and to effectively process the leachate, gas and heat generated by landfills, thereby realizing resource utilization. Overall, the field of advanced technologies in landfills is advancing towards sustainable waste management and resource recovery, offering a huge development space and application prospects.

This Special Issue concerning the advanced technologies in landfills is therefore proposed. We welcome both fundamental research and practical approaches to the problems and challenges faced by researchers, practitioners, and/or government policymakers. Well-documented case studies are also welcome when the authors indicate the wider application of their results. This Special Issue is expected to provide a forum for the discussion and presentation of solutions with respect to advanced technologies in landfills around the world. The following are some of the major areas which could be addressed in this Special Issue:

  • Composite liner performance;
  • Closure cover;
  • Cutoff wall;
  • Slope stability;
  • Stabilization of solid wastes;
  • Leachate treatment;
  • Gas collection;
  • Heat recovery;
  • Resource utilization;
  • Land contamination and remediation;
  • Laboratory and field testing methods;
  • Field monitoring;
  • Environmental assessment;
  • New and emerging issues and technologies.

Dr. Shi Shu
Dr. Yuping Li
Guest Editors

Manuscript Submission Information

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Keywords

  • landfill
  • municipal solid waste
  • fly ash
  • composite liner
  • slope stability
  • closure cover
  • leachate treatment
  • gas collection
  • heat recovery

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Published Papers (2 papers)

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Research

24 pages, 10783 KiB  
Article
Stability Analysis of the Landfill Slope with an Engineered Berm Under Composite Failure Mode
by Xiaobo Ruan, Yulong Li, Yu-Shan Luo, Hongwei Wang, Jiajia Chen and Zhongjun Ding
Appl. Sci. 2024, 14(24), 11515; https://doi.org/10.3390/app142411515 - 10 Dec 2024
Viewed by 699
Abstract
In order to increase the capacity of landfills while ensuring a certain degree of stability of such structures, an engineered berm is typically constructed at the front slope of the landfill. For this type of landfill slopes, this paper primarily focuses on the [...] Read more.
In order to increase the capacity of landfills while ensuring a certain degree of stability of such structures, an engineered berm is typically constructed at the front slope of the landfill. For this type of landfill slopes, this paper primarily focuses on the construction and verification of stability assessment models for such structures. Initially, the calculation models of the safety factor were established, considering over and under berm failure modes separately. Subsequently, through error analysis, it was determined that it is feasible to evaluate the stability of this type of landfills by substituting the true safety factor with the average safety factor obtained from the calculation model. The analysis for parameters and slip surfaces was then conducted to investigate the impact of parameters associated with the engineered berm on the landfill slope stability. Finally, a visual comparison and brief discussion were conducted on the average safety factors under translational and composite failure modes. Thus, the critical failure modes under specific working conditions can be reasonably ascertained, which holds significant practical implications for enhancing the reliability of stability assessment of such landfill slopes. Full article
(This article belongs to the Special Issue Advanced Technologies in Landfills)
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16 pages, 3979 KiB  
Article
Analytical Model for Contaminant Transport in the CGCW and Aquifer Dual-Domain System Considering GMB Holes
by Long Ran, Guijun Wan, Hao Ding and Haijian Xie
Appl. Sci. 2024, 14(22), 10280; https://doi.org/10.3390/app142210280 - 8 Nov 2024
Viewed by 622
Abstract
Composite geomembrane cut-off walls (CGCW) have been widely used for the remediation of polluted sites, especially where the environmental conditions are complex. Accurate predictions of the GMB hole leakage and CGCW performance are essential for engineering design and cost control. This paper establishes [...] Read more.
Composite geomembrane cut-off walls (CGCW) have been widely used for the remediation of polluted sites, especially where the environmental conditions are complex. Accurate predictions of the GMB hole leakage and CGCW performance are essential for engineering design and cost control. This paper establishes empirical equations to predict the leakages through the CGCWs based on the numerical models. Additionally, an analytical solution for contaminant migration through the CGCW is proposed considering the effects of GMB holes. The accuracy of the established equations and analytical solution is verified by the numerical models. The key effects of the GMB thickness (TG), head loss (HG), cut-off wall hydraulic conductivity (kG), hole radius (rG) and shape on the leakage and CGCW performance are investigated. The results show that compared with other hole shapes, the leakage through the circular hole is lowest. This is mainly because the shape factor for the circular hole is 1.15–1.3 times lower than that for other shapes of holes with the same area. Additionally, the effects of the hole geometric properties and head loss on the CGCW performance can be more significant when the cut-off wall hydraulic coefficient is small. For example, the breakthrough time differences between the cases with rG = 0.005 m and 0.05 m are 0.8 and 5.0 years when kG = 10−10 and 10−9 m/s, respectively. This is because the impermeability of the CGCW is good when kG is small. This will weaken the impacts of the hole geometric properties on the leakage. The proposed empirical equations and analytical solution can provide effective suggestions for the design of the CGCW in different GMB hole cases. Full article
(This article belongs to the Special Issue Advanced Technologies in Landfills)
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