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Organic and nitrogen load removal from bio-treated landfill leachates by a dual-anode system

Abstract

This paper describes and discusses the feasibility and practicability of anodic oxidation integrated with electrocoagulation process by the dual-anode system for the disposal of biologically pretreated landfill leachate. The effect of anode materials, applied voltage, and current applied on iron anode for organic matter and ammonia removal was investigated in batch operating mode. Continuous operation systems with or without inner circulation were conducted to evaluate long-term removal performance and energy cost of this system. The results revealed that 75% of organic matter and 80% of ammonia was removed from the leachate after 2 h treatment of dual-anode system when a current of 1.6 A was applied on the iron anode. The composition of iron-precipitates transformed from amorphous to crystalline ferric oxide particles when the current applied on iron anode increased. For a 5-day test, the removal of 78% COD and 99.7% ammonia was obtained in continuous operation mode with energy consumption of 25.6 kWh m-3, which implied the feasibility and sustainability of this technology to meet the disposal requirements of landfill leachate.

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Publication details

The article was accepted on 06 Oct 2018 and first published on 08 Oct 2018


Article type: Paper
DOI: 10.1039/C8EW00686E
Citation: Environ. Sci.: Water Res. Technol., 2018, Accepted Manuscript
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    Organic and nitrogen load removal from bio-treated landfill leachates by a dual-anode system

    J. Ding, J. Jiang, L. Wei, Y. Geng, Q. Zhao, Y. Yuan and D. D. Dionysiou, Environ. Sci.: Water Res. Technol., 2018, Accepted Manuscript , DOI: 10.1039/C8EW00686E

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