Related Experiment Video
Updated: Jun 1, 2026
13:23
A Protocol for Collecting and Constructing Soil Core Lysimeters
Published on: June 6, 2016
Effect of layers composition on leachate property from functional layer embedded landfill
Ziyang Lou1, Junheng Feng, Shenghao Zhong
1School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, PR China.
Bioresource Technology
|May 21, 2011
Summary
Functional layers embedded landfills (FLELs) show efficiency in reducing leachate strength and accelerating waste biodegradation. Layer 2 offers immediate pollutant removal, while Layer 1 promotes long-term microbial activity for better landfill management.
Area of Science:
- Environmental Engineering
- Waste Management
- Geotechnical Engineering
Background:
- Landfills generate leachate, a pollutant that requires effective management.
- Functional layers embedded landfills (FLELs) are designed to mitigate leachate issues at the source.
- Optimizing FLEL design is crucial for efficient waste biodegradation and pollutant reduction.
Purpose of the Study:
- To evaluate the efficiency of two FLEL configurations, LR1 (Layers 1 and 2) and LR2 (double Layer 1), in reducing leachate strength.
- To assess the impact of these configurations on accelerating the waste biodegradation process.
- To determine the optimal layer composition for different landfill types.
Main Methods:
- Comparison of cumulative Chemical Oxygen Demand (COD), Ammonia Nitrogen (NH3-N), leachate quantity, and landfill settlement between LR1 and LR2.
- Analysis of leachate effluent concentrations at the end of the operation period.
- Evaluation of pollutant removal mechanisms within Layer 1 and Layer 2.
Main Results:
- LR1 demonstrated significantly lower cumulative COD (63.0%), NH3-N (34.6%), leachate quantity (94.8%), and settlement (80.4%) compared to LR2.
- Leachate effluent concentrations were comparable in both LR1 and LR2 by the end of the study.
- Layer 2 provided immediate physical-chemical pollutant removal, while Layer 1 enhanced long-term microbial activity.
Conclusions:
- FLELs are effective in reducing leachate strength and promoting waste biodegradation.
- Layer 2 is suitable for immediate pollutant removal, particularly in plain landfills.
- Layer 1 is beneficial for long-term pollutant removal through enhanced microbial activity, making it suitable for valley landfills.
More Related Videos
Related Concept Videos
01:27Microbial Leaching
Microbial leaching, also known as bioleaching, is an environmentally favorable method for extracting metals from low-grade ores using specific microorganisms. This biotechnological approach is particularly valuable for mining operations targeting copper, gold, and uranium, where traditional extraction methods may be economically or environmentally impractical.Copper Leaching and Microbial CatalysisIn copper bioleaching, crushed ore is arranged into heaps and irrigated with a dilute sulfuric...
00:56Extraction: Advanced Methods
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is formed in...
01:19Acid Mine Drainage
Mining activities that disturb sulfide-rich rocks, particularly those containing pyrite (FeS₂), initiate a cascade of geochemical and microbiological processes with serious environmental implications. When exposed to air and water, pyrite undergoes oxidation, releasing sulfate, ultimately forming sulfuric acid and mobilizing heavy metals into surrounding water systems. This phenomenon, known as acid mine drainage (AMD), results in low pH waters laden with toxic elements that threaten aquatic...
01:30Biological Treatment of Effluent and Waste Water
Biological wastewater treatment relies on the metabolic activity of microorganisms to remove pollutants from sewage. In modern treatment systems, this process is organized into sequential stages that progressively reduce solid material, dissolved organic matter, and microbial contamination. Each stage plays a distinct role in improving water quality and preparing the effluent for safe discharge or reuse.Primary and Secondary TreatmentPrimary treatment is a physical process that removes large...
01:30Thematic Layering in GIS
In the past, planning projects such as schools or public facilities required extensive manual effort to gather and compile data. Information such as property boundaries, soil characteristics, road networks, zoning regulations, and flood zones had to be sourced individually from courthouses, utility providers, and registry offices. Assembling these datasets into a coherent format often took several months, delaying project timelines.The introduction of Geographic Information Systems (GIS)...