Nitrate removal by microbial enhancement in a riparian wetland

Pei, Yuansheng; Zhang, Yang; Tian, Binghui

doi:10.1016/j.biortech.2010.02.005

Cited by 18 publications

(8 citation statements)

References 24 publications

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“…It has been reported that bioaugmentation is a suitable way for accelerating the biodegradation rate in CWs treating various wastewaters even containing toxic contaminants (Zhao et al 2014;Meng et al 2014). The effect of the addition of Bacillus subtilis FY99-01 strains on nitrate removal in a riparian wetland was investigated by Pei et al (2010). Results indicated that B. subtilis FY99-01 efficiently enhanced denitrification with a maximal nitrate removal of 36 %.…”

Section: Bioaugmentationmentioning

confidence: 99%

Strategies and techniques to enhance constructed wetland performance for sustainable wastewater treatment

Fan

Zhang

et al. 2015

Environ Sci Pollut Res

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Constructed wetlands (CWs) have been used as an alternative to conventional technologies for wastewater treatment for more than five decades. Recently, the use of various modified CWs to improve treatment performance has also been reported in the literature. However, the available knowledge on various CW technologies considering the intensified and reliable removal of pollutants is still limited. Hence, this paper aims to provide an overview of the current development of CW strategies and techniques for enhanced wastewater treatment. Basic information on configurations and characteristics of different innovations was summarized. Then, overall treatment performance of those systems and their shortcomings were further discussed. Lastly, future perspectives were also identified for specialists to design more effective and sustainable CWs. This information is used to inspire some novel intensifying methodologies, and benefit the successful applications of potential CW technologies.

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Section: Bioaugmentationmentioning

confidence: 99%

Strategies and techniques to enhance constructed wetland performance for sustainable wastewater treatment

Fan

Zhang

et al. 2015

Environ Sci Pollut Res

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“…[1,2] In previous studies, RWs were divided into two types: (1) wetlands built in terrestrial regions of riparian zones, diverting and receiving lateral flow from the river; [3] and (2) wetlands constructed in river bend, connecting the river through inlet and outlet. [4] The two kinds of RWs are served for ex situ and in situ modification of polluted rivers.…”

Section: Introductionmentioning

confidence: 99%

Anammox bacteria community and nitrogen removal in a strip-like wetland in the riparian zone

Pei

Wang

et al. 2011

Journal of Environmental Science and Health, Part A

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A strip-like wetland was constructed in the riparian zone for investigation of ammonium nitrogen (NH(3)-N) removal in the Peach River. An inner zeolite layer was set in the wetland to adsorb NH(3)-N and further to remove total nitrogen (TN). An oxygen-deficient condition with dissolved oxygen of 0.87-1.60 mg L(-1) was observed in the zeolite layer, which benefits anaerobic ammonium oxidation (anammox) bacteria survival. The community structure of anammox bacteria was analyzed in the zeolite layer. The analysis shows that the anammox bacterial sequences are grouped into three known distinct clusters: Candidatus Brocadia fulgida, Candidatus Brocadia anammoxidans and Candidatus Jettenia asiatica. The intensified test driven by artificial pumping shows that average removal rates of NH(3)-N and TN are 41.6 mg m(-3)d(-1) and 63.2 mg m(-3)d(-1), respectively. The normal test driven by natural hydrodynamics also verifies that NH(3)-N removal mainly happens in the zeolite layer. Microbial mechanism of TN removal in the wetland involves both the autotrophic and heterotrophic process. These results suggest that the strip-like RW can be a cost-effective approach for NH(3)-N removal and can potentially be extended to similar rivers as no extra energy is required to maintain the wetland operation.

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“…It was reported that removal efficiencies for NO À 3 -N and NO À 2 -N increased with C/N ratio [8,20,35]. A significant effect of carbon addition on the nitrate removal was informed for the treatment of nitrate-contaminated wastewater using CWs [8,36,37].…”

Section: Insufficient Carbon Sourcementioning

confidence: 99%

Nitrate removal from tail water by integrated vertical-flow constructed wetlands at a high hydraulic loading rate

Chang¹,

Wu²,

Dai³

et al. 2013

Desalination and Water Treatment

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A B S T R A C TNitrate removal rates of two pilot-scale integrated vertical-flow constructed wetlands (IVCWs) treating tail water, under a hydraulic loading rate (HLR) of 250 mm/d with a mean influent NO À 3 -N concentration of 24.4 mg·L À1 , were evaluated. Mean NO À 3 -N removal efficiencies of 15.5 and 18.5% with mass removal rates of 1.01 g·m À2 ·d À1 and 1.16 g·m À2 ·d À1 for IVCW 1 (planted with Canna indica and Pontederia cordata) and 2 (planted with Typha orientalis and Arundo donax var. versicolor), respectively, were achieved. The removal rate constants as fitted by the first-order area-based model averaged 0.046 and 0.055 m·d À1 , respectively. Since NO À 3 -N was the dominant nitrogen form in the effluent, denitrification was the limiting step in nitrogen removal despite of favorable pH and anaerobic conditions in the wetland beds. Low availability of carbon source, high HLR, and low temperature could be the probable influencing factors for the observed low NO À 3 -N removal efficiencies. However, IVCW could be used to treat tail water for nitrate removal at a comparable high loading rate.

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Nitrate removal by microbial enhancement in a riparian wetland

Cited by 18 publications

References 24 publications

Strategies and techniques to enhance constructed wetland performance for sustainable wastewater treatment

Strategies and techniques to enhance constructed wetland performance for sustainable wastewater treatment

Anammox bacteria community and nitrogen removal in a strip-like wetland in the riparian zone

Nitrate removal from tail water by integrated vertical-flow constructed wetlands at a high hydraulic loading rate

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