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Effects of Recirculation on Mature Landfill Leachate

LI Jing-jing

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Abstract

A laboratory scale bioreactor with a recirculation system was developed to simulate treating aged refuse from a landfill in Shanghai.Study with bioreactor focused on its removal of the pollutants in leachate in terms of NH3-N,BOD and COD with various recirculation ratios and under different temperatures and loadings.The findings revealed that by increasing hydraulic loading it would be possible to significantly improve removal of total nitrogen(TN)though removal efficiencies of COD and NH3-N could be inhibited,thus indicating recirculation would be an approach to upgrading TN-removing of a mature landfill leachate.However scarcity of carbon source in mature leachate is still a limiting factor for nitrogen removal.

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What this paper is about

A laboratory scale bioreactor with a recirculation system was developed to simulate treating aged refuse from a landfill in Shanghai.Study with bioreactor focused on its removal of the pollutants in leachate in terms of NH3-N,BOD and COD with various recirculation ratios and under different temperatures and loadings.The findings revealed that by increasing hydraulic loading it would be possible to significantly improve removal of total nitrogen(TN)though removal efficiencies of COD and NH3-N could be inhibited,thus indicating recirculation would be an approach to upgrading TN-removing of a mature landfill leachate.However scarcity of carbon source in mature leachate is still a limiting factor for nitrogen removal.

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Available abstract

A laboratory scale bioreactor with a recirculation system was developed to simulate treating aged refuse from a landfill in Shanghai.Study with bioreactor focused on its removal of the pollutants in leachate in terms of NH3-N,BOD and COD with various recirculation ratios and under different temperatures and loadings.The findings revealed that by increasing hydraulic loading it would be possible to significantly improve removal of total nitrogen(TN)though removal efficiencies of COD and NH3-N could be inhibited,thus indicating recirculation would be an approach to upgrading TN-removing of a mature landfill leachate.However scarcity of carbon source in mature leachate is still a limiting factor for nitrogen removal.

Key concepts: Leachate, Bioreactor landfill, Pollutant, Environmental science, Bioreactor, Environmental engineering, Waste management, Nitrogen

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