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Abstract

This work presents a new hybrid technology for treating wastewater along with electricity generation. The main objective of this work was to integrate a microbial fuel cell (MFC) into a horizontal subsurface constructed wetland (HSSF-CW-MFC) at a pilot scale for improving the wastewater treatment performance of HSSF-CW. The HSSF-CW-MFC was tested on three different organic loading rates: 0.15, 0.30, and 0.52 kg COD/m3/d at a set hydraulic retention time. The HSSF-CW-MFC was further studied for establishing the influence of electron transfer using conductive material (artificial electron acceptor) on wastewater treatment performance. During the efficient electron transfer (system run in closed-circuit operation), 33.7% higher chemical oxygen demand (COD) removal was achieved in comparison to the hindered electron transfer (system run in open circuit) condition. The results illustrate that efficient electron transfer from bottom anaerobic zones to the aerobic zone of the HSSF-CW helps in enhancing the treatment performance. The maximum power and current densities achieved were 11.67 mW/m3and 17.15 mA/m3, respectively.

Item Type:	Article
Authors/Creators:	Srivastava, P and Abbassi, R and Garaniya, V and Lewis, T and Yadav, AK
Keywords:	constructed wetland, microbial fuel cell, constructed wetland-microbial fuel cell, open circuit, closed circuit
Journal or Publication Title:	Journal of Water Process Engineering
Publisher:	Elsevier
ISSN:	2214-7144
DOI / ID Number:	https://doi.org/10.1016/j.jwpe.2019.100994
Copyright Information:	© 2019 Elsevier Ltd. All rights reserved.
Related URLs:	Google Scholar: Garaniya, V UTAS Profile: Garaniya, V UTAS Profile: Lewis, T
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