Electrical current generation from a continuous flow macrophyte biocathode sediment microbial fuel cell (mSMFC) during t
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RESEARCH ARTICLE
Electrical current generation from a continuous flow macrophyte biocathode sediment microbial fuel cell (mSMFC) during the degradation of pollutants in urban river sediment Felix Tetteh Kabutey 1,2 & Jing Ding 1 & Qingliang Zhao 1 & Philip Antwi 3 & Frank Koblah Quashie 1 Received: 13 March 2020 / Accepted: 18 June 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract A new type of sediment microbial fuel cell (SMFC) with floating macrophyte Limnobium laevigatum, Pistia stratiotes, or Lemna minor L. biocathode was constructed and assessed in three phases at different hydraulic retention time (HRT) for electrical current generation during the degradation of urban river sediment. The results showed a highest voltage output of 0.88 ± 0.1 V, maximum power density of 80.22 mW m−3, highest columbic efficiency of 15.3%, normalized energy recovery of 0.030 kWh m−3 , and normalized energy production of 0.005 kWh m−3 in the Lemna minor L. SMFC during phase 3 at HRT of 48 h, respectively. Highest removal efficiencies of total chemical oxygen demand of 80%, nitrite of 99%, ammonia of 93%, and phosphorus of 94% were achieved in Lemna minor L. system, and 99% of nitrate removal and 99% of sulfate removal were achieved in Pistia stratiotes and Limnobium laevigatum system during the SMFC operation, respectively. Pistia stratiotes exhibited the highest growth in terms of biomass and tap root system of 29.35 g and 12.2 cm to produce the maximum dissolved oxygen of 16.85 ± 0.2 mg L−1 compared with other macrophytes. The predominant bacterial phylum Proteobacteria of 62.86% and genus Exiguobacterium of 17.48% were identified in Limnobium laevigatum system, while the class Gammaproteobacteria of 28.77% was observed in the control SMFC. The integration of technologies with the continuous flow operation shows promising prospect in the remediation of polluted urban river sediments along with the generation of electrical current. Keywords Sediment microbial fuel cell . Floating macrophyte biocathode . Urban river sediment . Pollutant removal . Electrical current
Responsible Editor: Weiming Zhang Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11356-020-09812-y) contains supplementary material, which is available to authorized users. * Qingliang Zhao [email protected]; [email protected] Felix Tetteh Kabutey [email protected]
1
State Key Laboratory of Urban Water Resources and Environments (SKLURE), Harbin Institute of Technology, Harbin 150090, China
2
Council for Scientific and Industrial Research-Institute for Scientific and Technological Information (CSIR–INSTI), P. O. Box M–32, Accra, Ghana
3
Jiangxi Key Laboratory of Mining & Metallurgy Environmental Pollution Control, School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, People’s Republic of China
Jing Ding [email protected] Philip Antwi [email protected] Frank Koblah Quashie [email protected]
Environ Sci Pollut Res
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