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Combined landfill leachate treatment methods: an overview
Shamimeh Babaei1, Mohammad Reza Sabour1, Saman Moftakhari Anasori Movahed2
1Faculty of Civil Engineering, K. N. Toosi University of Technology, Tehran, Iran.
Environmental Science and Pollution Research International
|September 12, 2021
Summary
Landfill leachate treatment is challenging. Combining biological and physicochemical methods, like coagulation-flocculation/nanofiltration, offers efficient solutions for leachate contamination.
Area of Science:
- Environmental Science
- Water Treatment Engineering
Background:
- Landfill leachate poses significant environmental and public health risks due to high contamination levels.
- Effective treatment is crucial before discharging leachate into water bodies, presenting a major challenge.
Purpose of the Study:
- To review and compare different landfill leachate treatment methods.
- To evaluate the efficacy of integrated biological and physicochemical treatment strategies.
Main Methods:
- Physicochemical methods (coagulation-flocculation, adsorption, membrane filtration, ozonation, air stripping, AOPs) for mature leachate.
- Biological treatments (MBR, AS, UASB, RBC) for young leachate.
- Analysis of combined biological and physicochemical treatment approaches.
Main Results:
- Physicochemical methods are suitable for mature leachate; biological methods are preferred for young leachate.
- Integrated treatment approaches demonstrate high efficiency.
- Combined coagulation-flocculation/nanofiltration and activated sludge/reverse osmosis show superior performance.
Conclusions:
- Integrated treatment strategies are highly effective for landfill leachate.
- Specific combined methods offer superior efficacy over individual or other integrated approaches for comprehensive leachate management.
