Eco-Electrogenic Engineered Flow through Wetland System for Tertiary Treatment of Acidogenic Effluents from Biohydrogen Production
Publication: Journal of Hazardous, Toxic, and Radioactive Waste
Volume 24, Issue 3
Abstract
Ecological intervention is used for a diverse range of applications to provide sustainable solutions toward restoring natural capital. Eco-electrogenic engineered wetland systems (EEWSs), coupled with a microbial fuel cell (MFC), were designed and operated to utilize the natural ecological abilities by way of mimicking nutrient cycles to obtain the requisite treatment. An EEWS, designed with floating, emergent, and submerged aquatic macrophytes integrated with an electrode assembly, was studied for the treatment of fermented wastewater (generated from biohydrogen production using food waste). The experiment was carried out with 250 and 500 mg/L of organic carbon load, which accounted for combined chemical oxygen demand (COD) removal efficiencies of 87% and 85% and volatile fatty acid (VFA) removal efficiencies of 87% and 80%, respectively. The maximum in situ potential of 1.5 and 1.9 V at the current densities of 17 and 18 mA was recorded, respectively, at 250 and 500 mg/L. The hybrid system showed high efficiency in removing fermented acid-rich effluents and can, therefore, be utilized as a promising polishing/final treatment unit with sustainable footprints.
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Acknowledgments
This research was funded by the Department of Biotechnology (DBT), Government of India (No. BT/HRD/35/01/02/2018). D. K. Y. duly acknowledges CSIR for providing a fellowship. The authors wish to thank the Director of CSIR-IICT (Manuscript No. IICT/Pubs./2019/046), for providing all the required facilities to carry out this work.
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Published In
Journal of Hazardous, Toxic, and Radioactive Waste
Volume 24 • Issue 3 • July 2020
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Sep 30, 2019
Accepted: Jan 7, 2020
Published online: Apr 22, 2020
Published in print: Jul 1, 2020
Discussion open until: Sep 22, 2020
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