Evaluating the performance of coupled MFC-MEC with graphite felt/MWCNTs polyscale electrode in landfill leachate treatme
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RESEARCH ARTICLE
Evaluating the performance of coupled MFC-MEC with graphite felt/MWCNTs polyscale electrode in landfill leachate treatment, and bioelectricity and biogas production Hossein Jafari Mansoorian 1 & Amirhossein Mahvi 1,2 & Ramin Nabizadeh 1,2 & Mahmood Alimohammadi 1,3,4 & Shahrokh Nazmara 1,4 & Kamyar Yaghmaeian 1,2 Received: 7 July 2020 / Accepted: 3 September 2020 # Springer Nature Switzerland AG 2020
Abstract Purpose A bioelectricity producing system was configured by connecting to a microbial electrolysis cell producing hydrogen, in which both systems were without mediator, to treatment the landfill leachate of the and generate bioelectricity and hydrogen. Methods The anode electrode was made with MWCNTs polyscale coating on graphite felt and the cathode electrode with activated carbon coating on carbon cloth. In the MFC-MEC coupled system, the electrodes were connected in series using copper wire. The system was set up in a fed-batch mode and the landfill synthetic leachate was injected into the anode MFC-MEC chamber as fuel. Results In MFC, the highest voltage, current density and power density were 1114 mV, 44.2A/m3 and 49.24 W/m3, respectively. The maximum of the coulombic efficiency system was 94.10%. The highest removed COD, NH4-N and P was 97.38%, 79.56% and 74.61%, respectively. In the MEC, the maximum of voltage input, current density and power density was 1106 mV, 43.88 A/m3and 48.54 W/m3, respectively. The maximum coulombic efficiency system was 125.54%. Also the highest removed COD, NH4-N and P was 97.46%, 78.81% and 76.25%, respectively. The highest biogas production rate and its yield were 39 mL/L.d, and 0.0118 L/g CODrem, respectively. Conclusion This study found that the MFC-MEC coupled system had promising potential for strong wastewaters treatment, such as the leachate of landfill; and the in-site use of generated electricity and the production of useful fuels such as biogas. Keywords Microbial fuel cell . Microbial electrolysis cell . Bioelectricity generation . Biogas production . Polyscale electrode . Leachate treatment
Introduction Controlled landfills are still the most widely used waste disposal methods in developing countries, even if the waste management hierarchy considers this treatment to be the last
resort. Every year, hundreds of thousands of cubic meters of leachate is released from these places. However, the generation of leachates is a critical issue of this landfill. Leachate is commonly generated from precipitation, surface run-off, and infiltration of groundwater percolating through the landfill [1,
* Kamyar Yaghmaeian [email protected]
Shahrokh Nazmara [email protected]
Hossein Jafari Mansoorian [email protected]
1
Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Science, Tehran, Iran
Amirhossein Mahvi [email protected]
2
Center for Solid Waste Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran
Ramin Nabizadeh [email protected]
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