Degradation of organic pollutants in leachate from a garbage incineration plant: Exploring Electrochemical oxidation for the treatment of membrane bioreactor (MBR) effluent

Authors

  • Md Nuralam Hossain School of Environment and Ecology, Chongqing University, Chongqing 400045, P. R. China
  • Xiao-lan Zeng School of Environment and Ecology, Chongqing University, Chongqing 400045, P. R. China
  • Ding Wen-chuan School of Environment and Ecology, Chongqing University, Chongqing 400045, P. R. China
  • Liang Cheng School of Environment and Ecology, Chongqing University, Chongqing 400045, P. R. China

DOI:

https://doi.org/10.48422/IMIST.PRSM/ajees-v8i2.29368

Keywords:

Organic pollutants, leachate, electrochemical oxidation, membrane bioreactor, waste incineration plant

Abstract

Leachate is one of the significant environmental pollutions in municipal solid waste incineration plants (MSWIP), requiring efficient treatment to achieve the discharge standard. Upon treatment of this leachate from MSWIP in the MBR, the resultant effluent contains a large amount of recalcitrant organic pollutants characterized by the high concentration of chemical oxygen demand (COD) and resists biological degradation. Thus, the electrochemical oxidation technology to oxidize such pollutants was introduced. This study studied the degradation of organic contaminants in leachate from the MBR effluent in MSWIP. Electrochemical oxidation (EO) degradation was stimulated in a batch electrochemical reactor employing graphite carbon electrodes as anode and cathode without an electrolyte. The effect of working variables such as current density, electrolysis time (up to 240 min), the inter-electrode distance between the electrode and initial solution pH were studied. The COD removal rate of 83% was obtained at the current density of 0.8 A/m2, and an operation time of 180 min. The optimal inter-electrode distances and the initial pH were 2cm and 5.04, respectively. It was found that the elevated current densities, high electrolysis time, and alkaline conditions substantially affected the COD removal efficiency. The EO is a useful technology for the degradation of recalcitrant organic pollutants in the MBR effluent for leachate treatment

Author Biographies

Md Nuralam Hossain, School of Environment and Ecology, Chongqing University, Chongqing 400045, P. R. China

Md. Nuralam Hossain, who works as a Doctoral Researcher with the Department of Environmental Engineering under the school Environment and Ecology at Chongqing University, China. His current research interests are wastewater treatment, landfill leachate
treatment, SWM, climate change, and its impacts assessment for sustainable development. He has
published over 30 articles in reputed indexed journals and few are submitted. He has been serving
as a reviewer, peer reviewer with a few scientific societies and editorial board members. In addition, he
has been working as a Guest Editor for a special issue with a few journals.

Xiao-lan Zeng, School of Environment and Ecology, Chongqing University, Chongqing 400045, P. R. China

Professor Dr. Xiaolan Zeng, working as Professor, with the Department of water science and engineering under the school of the environment and ecology at Chongqing University. Her research interest on wastewater treatment, SWM.

She is the corresponding author of this manuscript.

Ding Wen-chuan, School of Environment and Ecology, Chongqing University, Chongqing 400045, P. R. China

Professor Dr. Ding Wen-chuan, working as Professor, with the Department of environmental engineering under the school of environment and ecology at Chongqing University. Her research interest on wastewater treatment, SWM.

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Published

01-07-2022

Issue

Vol. 8 No. 2 (2022)

Section

Articles