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Nitrogen removal from landfill leachate using single or combined processes.
1State Key Laboratory of Pollution Control & Reclamation, Tongji University, Shanghai, 200092, PR China.
Environmental Technology
|May 24, 2005
Summary
This study shows a new three-compartment system effectively removes ammonia-nitrogen from landfill leachate. This method converts nitrogen into gas, offering a sustainable solution for high-nitrogen waste management.
Area of Science:
- Environmental Science
- Waste Management
- Water Treatment
Background:
- Municipal solid waste (MSW) in Shanghai has high food waste content, leading to ammonia-nitrogen in leachate.
- Ammonia-nitrogen in landfill leachate poses significant environmental challenges.
- Effective nitrogen removal strategies are crucial for sustainable waste management.
Purpose of the Study:
- To investigate the efficiency of different treatment processes for nitrogen removal from landfill leachate.
- To evaluate a novel three-compartment system for managing high ammonia-nitrogen content leachate.
Main Methods:
- Comparison of four nitrogen removal processes: simulated rainfall, direct leachate recycling, aerobic reactor pretreatment, and a three-compartment system.
- The three-compartment system integrates a landfill column, a methane generator, and a nitrifier.
Main Results:
- Simulated rainfall and direct recycling showed minimal nitrogen removal.
- Aerobic reactor pretreatment converted nitrogen primarily into biomass due to high organic loading.
- The three-compartment system successfully converted ammonia-nitrogen into nitrogen gas, achieving effective removal.
Conclusions:
- The three-compartment system is a feasible and effective method for managing nitrogen in landfill leachate from high-nitrogen MSW.
- This system offers a promising solution for mitigating nitrogen pollution from landfills.
- Further research can optimize this integrated approach for broader application.