Plasma Treatment of Industrial Landfill Leachate by Atmospheric Pressure Dielectric Barrier Discharges

ZHAO Di; WANG Dacheng; YAN Gui; MA Hong; XIONG Xiaojing; LUO Jinjing...

Plasma Science and Technology > 2011 > 13(5): 612-616.

ZHAO Di, WANG Dacheng, YAN Gui, MA Hong, XIONG Xiaojing, LUO Jinjing.... Plasma Treatment of Industrial Landfill Leachate by Atmospheric Pressure Dielectric Barrier Discharges[J]. Plasma Science and Technology, 2011, 13(5): 612-616.

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Plasma Treatment of Industrial Landfill Leachate by Atmospheric Pressure Dielectric Barrier Discharges

1 College of Photoelectrical Engineering, Changchun University of Science and Technology, Changchun 130022, China 2 Fujian Key Laboratory for Plasma and Magnetic Resonance, Department of Aeronautics, School of Physics and Mechanical & Electrical Engineering, Xiamen University, Xiamen 361005, China 3 College of Science, Changchun University of Science and Technology, Changchun 130022, China 4 State Key Laboratory of Marine Environmental Science, College of Marine Science & Environmental Science, Xiamen University, Xiamen 361005, China 5 The Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

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Received Date: September 11, 2010

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Abstract

Abstract

An dielectric barrier discharge (DBD) system in atmospheric pressure utilized for the treatment of industrial landfill leachate is reported. The discharge parameters, such as the operating frequency, gas flow rate, and treating duration, were found to affect significantly the removal of ammonia nitrogen (AN) in industrial landfill leachate. An increase in treating duration leads to an obvious increase in the removal efficiency of AN (up to 83%) and the leachate color changed from deep grey-black to transparent. Thus the dielectric barrier discharges in atmospheric pressure could degrade the landfill leachate effectively. Typical waveforms of both applied voltage and discharge current were also presented for analyzing the discharge processes under different discharge parameters. Optical emission spectra measurements indicate that oxidation species generated in oxygen DBD plasma play a crucial role in removing AN, oxidizing organic and inorganic substances and decolorizing the landfill leachate.
- DBD plasma,
- landfill leachate,
- ammonia nitrogen,
- optical emission spectra

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