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Material selection for landfill leachate piping by using a grey target decision-making approach
1Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 611756, China.
Environmental Science and Pollution Research International
|August 20, 2020
Summary
Selecting the best pipe material for landfill leachate transport is crucial. High-density polyethylene (HDPE) and polyvinyl chloride (PVC) pipes are recommended over steel for improved performance and durability in leachate piping systems.
Area of Science:
- Environmental Engineering
- Materials Science
- Civil Engineering
Background:
- Landfill leachate poses risks and requires collection and transport via piping systems.
- Pipe materials can corrode or scale when in contact with leachate, leading to system failures.
- Current material selection is often empirically based, lacking a systematic approach.
Purpose of the Study:
- To develop an indicator system for selecting optimal pipe materials for landfill leachate transport.
- To improve the precision of material selection beyond empirical methods.
- To provide insights for designing robust leachate piping systems.
Main Methods:
- An indicator system incorporating functional, economic, and environmental attributes was developed.
- Four common drainage pipe materials (HDPE, PVC, galvanized steel, seamless steel) were evaluated.
- A grey target decision-making framework was used with experimental data for material ranking.
Main Results:
- High-density polyethylene (HDPE) demonstrated the best overall performance.
- Polyvinyl chloride (PVC) ranked second, followed by galvanized steel and seamless steel.
- The proposed indicator system provided a priority ranking of the tested materials.
Conclusions:
- HDPE is the most suitable material for landfill leachate piping systems based on the evaluation.
- The developed indicator system offers a valid and applicable method for material selection.
- This systematic approach enhances the design of reliable leachate collection and transport infrastructure.
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