Simultaneous nitrate and sulfide removal using a bio-electrochemical system

This study addresses the applicability of simultaneous nitrate and sulfide removal using two-chamber bio-electrochemical systems (BES). The anode and cathode chambers of a BES were fed with the effluent of a sulfate reducing reactor and a nitrate-rich groundwater as an electron donor and acceptor so...

Full description

Saved in:
Bibliographic Details
Published in:Bioelectrochemistry (Amsterdam, Netherlands) Netherlands), 2019-10, Vol.129, p.228-234
Main Authors: Bayrakdar, Alper, Tilahun, Ebrahim, Çalli, Bariş
Format: Article
Language:English
Subjects:
Anodes
Cathodes
Denitrification
Effluents
Electrochemistry
Electrons
Groundwater
Hydrogen sulfide
Nitrate reduction
Nitrates
Oxidation
Sulfate reduction
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This study addresses the applicability of simultaneous nitrate and sulfide removal using two-chamber bio-electrochemical systems (BES). The anode and cathode chambers of a BES were fed with the effluent of a sulfate reducing reactor and a nitrate-rich groundwater as an electron donor and acceptor sources, respectively. BES has been found to be effective for simultaneous removal of sulfide and nitrate coming from different sources and without mixing them. As a result, 10 gS/m /d of sulfide oxidation and 7.26 gN/m /d of nitrate reduction rates were achieved. The number of electrons used for denitrification was more than that of delivered from the anode, especially when the anode chamber was fed with the SRR effluent and operated at pH 7-7.5. It was supposed that H S was used for denitrification in the cathode by passing through the membrane. Another reason for this might be the electrons released from the corroding steel mesh current collector.
ISSN:1567-5394
1878-562X
DOI:10.1016/j.bioelechem.2019.06.003