Proceedings of the 2016 International Conference on Education, Management, Computer and Society

Nitrate Removal from Groundwater by Nanoscale Zero-Valent Iron (NZVI) Coupling Autohydrogenotrophic Denitrification

Authors
Hongyu Wang, Shilu Zhang, Dan Chen, Qiulai He
Corresponding Author
Hongyu Wang
Available Online January 2016.
DOI
https://doi.org/10.2991/emcs-16.2016.333How to use a DOI?
Keywords
Nitrate removal; NZVI; Chemical denitrification; Autohydrogenotrophic denitrification; Coupling system.
Abstract
In this work, the denitrification performance of a bio-reactor based on nanoscale zero-valent iron (NZVI) coupling autohydrogenotrophic denitrification was investigated. A series of bio-reactors were configured by inoculating and acclimating pure culture capable capable of denitrification. Effects of various parameters including nitrate (NO3-_N) loading, NZVI to nitrogen ratio (Fe/N), pH and atmosphere on denitrification were evaluated by batch tests. The results showed that the optimum Fe/N and NO3--N loading were 2.8 and 105 mg/L, respectively. Dentrification process remained unaffected by pH ranging from 6.0 to 9.0, while sharp accumulation of nitrite (NO2-_N) occurred at pH 9.0. Complete NO3-_N removal was obtained by providing both nitrogen (N2) and hydrogen gas (H2). In general, excellent nitrogen removal efficiency was always achieved in the chemical-biological coupling system, indicating that the system had strong stability and adaptability for practical application, which offered both theoretic and technical supports to a new efficient and cost-effective method to eliminate NO3-_N from water.
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Proceedings
International Conference on Education, Management, Computer and Society
Part of series
Advances in Computer Science Research
Publication Date
January 2016
ISBN
978-94-6252-158-2
ISSN
2352-538X
DOI
https://doi.org/10.2991/emcs-16.2016.333How to use a DOI?
Open Access
This is an open access article distributed under the CC BY-NC license.

Cite this article

TY  - CONF
AU  - Hongyu Wang
AU  - Shilu Zhang
AU  - Dan Chen
AU  - Qiulai He
PY  - 2016/01
DA  - 2016/01
TI  - Nitrate Removal from Groundwater by Nanoscale Zero-Valent Iron (NZVI) Coupling Autohydrogenotrophic Denitrification
BT  - International Conference on Education, Management, Computer and Society
PB  - Atlantis Press
SP  - 1346
EP  - 1349
SN  - 2352-538X
UR  - https://doi.org/10.2991/emcs-16.2016.333
DO  - https://doi.org/10.2991/emcs-16.2016.333
ID  - Wang2016/01
ER  -