Enhanced treatment of landfill leachate with cathodic algal biofilm and oxygen-consuming unit in a hybrid microbial fuel cell system

Khaled Elmaadawy, Jingping Hu, Shengxia Guo, Huijie Hou, Jikun Xu, Dongliang Wang, Ting Liang, Jiakuan Yang, Sha liang, Keke Xiao, Bingchuan Liu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

An innovative cathodic algal biofilm microbial fuel cell equipped with a bioactive oxygen consuming unit (AB-OCU-MFC) was proposed for enhancing the leachate treatment containing biorefractory organic matters and high strength of ammonium nitrogen. The proposed AB-OCU-MFC performed better with regard to COD, NH4+-N, TN removals and algal biomass yield than standalone algal biofilm-MFC and control reactors. AB-OCU-MFC with OCU of 2 cm thickness removed more than 86% of COD, 89.4% of NH4+-N, 76.7% of TN and produced a maximum voltage of 0.39 V and biomass productivity of 1.23 g·L−1·d−1. The High-throughput sequencing of DNA showed a significant change in microbial community of reactors implemented with OCU, in which the ratio of exoelectrogenic bacteria of anode and denitrifying bacteria on cathode were significantly increased. The results obtained by cathodic algal biofilm MFC with low cost and bioactive barrier of OCU, would provide a new sight for practical application of MFC.

Original languageEnglish
Article number123420
JournalBioresource Technology
Volume310
DOIs
StatePublished - Aug 2020
Externally publishedYes

Keywords

  • Landfill leachate
  • Microalgae biofilm
  • Microbial community
  • Microbial fuel cell
  • Oxygen consuming unit

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