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Denitrification in a low carbon environment of a constructed wetland incorporating a microbial electrolysis cell
Citation
Srivastava, P and Yadav, AK and Abbassi, R and Garaniya, V and Lewis, T, Denitrification in a low carbon environment of a constructed wetland incorporating a microbial electrolysis cell, Journal of Environmental Chemical Engineering, 6, (4) pp. 5602-5607. ISSN 2213-3437 (2018) [Refereed Article]
Copyright Statement
© 2018 Elsevier Ltd.
DOI: doi:10.1016/j.jece.2018.08.053
Abstract
The main aim of this study was to explore the possibility of denitrification under low carbon conditions in a microbial electrolysis cell (MEC) integrated into a constructed wetland (CW). To our knowledge, this is the first systematic study of the incorporation of an MEC into a CW for enhancing denitrification. CWs are an efficient and low-cost technology for wastewater treatment facing problems in denitrification under low carbon conditions. Two CW-microcosms were fabricated: one included an MEC arrangement with granular graphite electrodes attached to a power source and the other with a microcosm fabricated with normal stone gravel as a control. These microcosms were fed with synthetic wastewater containing 50 mg/l of nitrate-nitrogen (NO3-N) with different ratios of organic carbon. Carbon to nitrogen ratio (C: N) were kept to 2:1, 1:1 and 0.5:1. The maximum concentration of organic carbon was 100 mg/l, subsequently decreased to 50 mg/l to 25 mg/l. The highest percentage removal achieved from CW-MEC in C: N ratios of 2:1 were 69.3% on 0.583 mA applied current, whereas the control microcosm’s removal efficiency on the same C:N was 66.2%. The outcomes of this study show that the NO3-N removal was always higher in the MEC integrated CW compared to the normal CW. The study concludes that the higher denitrification is possible by incorporation of an MEC into a constructed wetland under low carbon condition. This approach can provide a new direction for denitrification enhancement in a CW.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | denitrification, microbial electrolysis cell, constructed wetland-microbial electrolysis cell, electron donor, electrode |
| Research Division: | Engineering |
| Research Group: | Environmental engineering |
| Research Field: | Environmentally sustainable engineering |
| Objective Division: | Manufacturing |
| Objective Group: | Environmentally sustainable manufacturing activities |
| Objective Field: | Management of liquid waste from manufacturing activities (excl. water) |
| UTAS Author: | Srivastava, P (Miss KM Pratiksha Srivastava) |
| UTAS Author: | Garaniya, V (Dr Vikram Garaniya) |
| UTAS Author: | Lewis, T (Associate Professor Trevor Lewis) |
| ID Code: | 128091 |
| Year Published: | 2018 |
| Web of Science® Times Cited: | 11 |
| Deposited By: | NC Maritime Engineering and Hydrodynamics |
| Deposited On: | 2018-09-03 |
| Last Modified: | 2018-11-26 |
| Downloads: | 0 |
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