Wang, X.; Zhu, H.; Yan, B.; Shutes, B.; Bañuelos, G.; Wen, H.

Bioaugmented constructed wetlands for denitrification of saline wastewater: a boost for both microorganisms and plants

Article

Wang, X., Zhu, H., Yan, B., Shutes, B., Bañuelos, G. and Wen, H. 2020. Bioaugmented constructed wetlands for denitrification of saline wastewater: a boost for both microorganisms and plants. Environment International. 138. https://doi.org/10.1016/j.envint.2020.105628

Publication dates
Type	Article
Title	Bioaugmented constructed wetlands for denitrification of saline wastewater: a boost for both microorganisms and plants
Authors	Wang, X., Zhu, H., Yan, B., Shutes, B., Bañuelos, G. and Wen, H.
Abstract	The inhibition of salt stress on plant and microbial functions has led to the reduction of nitrogen removal capacity of constructed wetlands (CWs) under saline conditions. The mechanisms and effectiveness of bioaugmented CW (Bio-CW) microcosms with a salt-tolerant microbial inoculum were evaluated for nitrogen removal at different salinity levels. The results showed that the denitrification capacity of CWs was improved under saline conditions by adding the salt-tolerant microbial inoculum. At an EC of 15 mS/cm, the removal percentages of ammonia nitrogen (NH -N) and total nitrogen (TN) in Bio-CW microcosms (95.7% and 99.4%) on Day 5 were significantly (p < 0.05) higher than that in unbioaugmented CW (un-Bio-CW) microcosms (68.5% and 76.4%), respectively. The high throughput sequencing data of substrate samples indicated that the microbial community in the CWs was changed by the addition of the salt-tolerant microbial inoculum and the frequency of bacteria with nitrogen removal function was increased in the CWs. Furthermore, both growth and the TN accumulation capacity of plants in Bio-CW microcosms were promoted compared with the un-Bio-CW microcosms. In conclusion, the addition of the salt-tolerant microbial inoculum can enhance the nitrogen removal efficiency of CWs under saline condition via boosting the function of both microorganisms and plants. [Abstract copyright: Copyright © 2020 The Authors. Published by Elsevier Ltd.. All rights reserved.]
Keywords	Alishewanella sp., constructed wetlands, denitrifying bacteria, microbial augmentation, Saline wastewater
Publisher	Elsevier
Journal	Environment International
ISSN	0160-4120
Online	08 Mar 2020
Print	31 May 2020
Publication process dates
Deposited	24 Mar 2020
Accepted	01 Mar 2020
Output status	Published
Publisher's version	1-s2.0-S0160412020303706-main.pdf License CC BY-NC-ND 4.0
Copyright Statement	© 2020 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license.
Digital Object Identifier (DOI)	https://doi.org/10.1016/j.envint.2020.105628
Language	English

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