Effects of plant biomass on nitrate removal and transformation of carbon sources in subsurface-flow constructed wetlands

Wen, Yue; Chen, Yi; Zheng, Nan; Yang, Dianhai; Zhou, Qi

doi:10.1016/j.biortech.2010.04.068

Cited by 125 publications

(56 citation statements)

References 29 publications

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“…With regard to COD, TN and TOC, it was found that the CW1 (SF-CW) and CW6 (HSSF-CW without plants) performed worse than the other four CWs including two HSSF-CWs and two VSSF-CWs. Subsurface flow and planting were beneficial to the removal of nutrients, which is consistent to some previous studies (Brix, 1994;Lin et al, 2002b;Wen et al, 2010;Vymazal, 2011;Carvalho et al, 2014). For 8 detected antibiotics, CW4 and CW5 (HSSF-CWs with different plants) performed better than the other four CWs, with CW1 being the worst (Fig.…”

Section: Performance Comparison Among the Mesocosm-scale Cwssupporting

confidence: 91%

Removal of antibiotics and antibiotic resistance genes from domestic sewage by constructed wetlands: Effect of flow configuration and plant species

Chen

Ying

Wei

et al. 2016

Science of The Total Environment

179

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Section: Performance Comparison Among the Mesocosm-scale Cwssupporting

confidence: 91%

Removal of antibiotics and antibiotic resistance genes from domestic sewage by constructed wetlands: Effect of flow configuration and plant species

Chen

Ying

Wei

et al. 2016

Science of The Total Environment

179

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“…in VF wetlands when the carbon source in the influent is sufficient, which agrees with many previous studies (Lin et al 2002;Bastviken et al 2007;Wen et al 2010). Xiong et al (2005) think that organics are far more diverse than could result from a single, low-molecularweight organic carbon source, indicating that a variety of sources are required to satisfy the needs of diverse types of denitrifying bacteria.…”

Section: Tn Removal In Constructed Vf Wetland Reactorssupporting

confidence: 89%

“…glucose, methanol, sodium acetate and tartaric acid) and the neotype carbon sources (e.g. newspaper, wheat straw, plant materials and food industry wastewater) as external carbon sources can enhance denitrification efficiency under conditions of low C/N and limited organic carbon CWs (Ståhl 2000;Lin et al 2002;Hume et al 2002a, b;Rustige and Nolde 2007;Wen et al 2010). Because of the high costs of traditional carbon sources, it is necessary to focus on the neotype carbon sources.…”

mentioning

confidence: 98%

“…Hu et al (2009) found that supplying liquid carbon sources (glucose, sucrose, citric acid and mannitol) resulted in the increase of the soil N 2 O emissions. Besides, Wen et al (2010) demonstrated that using the alkali-pretreated and alkaliunpretreated litters as organic carbon sources for nitrate removal in CWs stimulated N 2 O fluxes. The nitrate removal rates were greatly affected by the composition of plant biomass as well as the quantity and quality of the available organics during the initial stage.…”

mentioning

confidence: 98%

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Effects of Plant Material as Carbon Sources on TN Removal Efficiency and N2O Flux in Vertical-Flow-Constructed Wetlands

Zhang

Zhao

Mei

et al. 2014

Water Air Soil Pollut

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A nitrate-dominant synthetic wastewater simulating slightly polluted water with low C/N and poor biochemical availability was treated in lab-scale vertical-flow (VF)-constructed wetlands, which had Phragmites australis planted with different types of external carbon sources: Platanus acerifolia leaf litters, P. australis litters, glucose and a blank test with no external carbon sources. A comparison of the TN removal and N 2 O flux performances among the four wetland reactors indicated higher TN removal efficiencies and N 2 O release fluxes in the VF wetland columns with external carbon sources, as measured by the percentage removal of TN (P. acerifolia leaf litters 82.49 %, P. australis litters 70.55 %, glucose 62.50 % and blank 46.45 %) and N 2 O flux (P. acerifolia leaf litters 2275.22 μg·m −2 ·h −1 , P. australis litters 1920.53 μg·m −2 ·h −1 , glucose 1598.57 μg·m −2 ·h −1 and blank 1192.08 μg·m −2 ·h −1 ). This was primarily because of an improved supply of organic carbon from the external carbon sources for heterotrophic denitrification. And, the nitrogen released from the decomposition of plant materials resulted in the N 2 O release fluxes to some extent. However, employing P. acerifolia leaf litters and P. australis litters as external carbon sources caused net increases in organics of the final effluent water. Overall, the results not only demonstrated the potential of using external plant carbon sources in VF wetlands to enhance the TN removal efficiency but also showed a risk of excessive organic release and greater N 2 O flux feedback to global warming. Hence, future studies are needed to optimise the quantity and method for adding external carbon sources to VF-constructed wetlands so that sufficient nitrate removal efficiency is achieved and the N 2 O flux and organic pollution are minimised.

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“…Chu and Wang (2011) reported that, under the average influent of TN 52.6 mg/L, TN removal was only 1%-20% when using a moving bed biofilm reactor to treat low C/N ratio wastewater (3.7-4.2). Due to insufficient carbon levels, TN removal could be inhibited when the influent C/N ratio is low when sequencing batch membrane bioreactors (SBMBRs) (Zhang et al, 2006), SBR (Kim et al, 2008), and wetlands (Wen et al, 2010) are used for treatment. Therefore, the wastewater with a low C/N ratio in the present study would not be able to supply enough degradable carbon to act as an electronic donor for denitrification if conventional methods were used.…”

Section: C/n Ratio In Turtle Aquaculture Wastewatermentioning

confidence: 99%

Treatment of turtle aquaculture effluent by an improved multi-soil-layer system

Song

Huang

et al. 2015

J. Zhejiang Univ. Sci. B

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Abstract:Concentrated turtle aquaculture effluent poses an environmental threat to water bodies, and therefore needs to be treated prior to disposal. This study was conducted to assess the effect of multi-soil-layer (MSL) systems treating turtle aquaculture effluent with adding different amounts of sludge. Four MSL systems were constructed with dry weight ratios of sludge with 0%, 5%, 10%, and 20% (MSL 1, MSL 2, MSL 3, and MSL 4, respectively). The turtle aquaculture effluent had an average chemical oxygen demand ( -N removal efficiencies of MSL 4 were 70.3%, 66.5%, and 72.7%, respectively. To further interpret the contribution of microorganisms to the removal, the microbial community compositions and diversities of the four MSL systems were measured. Comparisons of the denaturing gradient gel electrophoresis (DGGE) profiles revealed that the amount of nitrifying bacteria and diversity in MSL 4 were higher than those in the other three systems. We concluded that adding 20% of sludge improved the NH 4 + -N removal and stability of the system for nitrification, due to the enrichment of the nitrifying bacteria in MSL 4.

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Effects of plant biomass on nitrate removal and transformation of carbon sources in subsurface-flow constructed wetlands

Cited by 125 publications

References 29 publications

Removal of antibiotics and antibiotic resistance genes from domestic sewage by constructed wetlands: Effect of flow configuration and plant species

Removal of antibiotics and antibiotic resistance genes from domestic sewage by constructed wetlands: Effect of flow configuration and plant species

Effects of Plant Material as Carbon Sources on TN Removal Efficiency and N2O Flux in Vertical-Flow-Constructed Wetlands

Treatment of turtle aquaculture effluent by an improved multi-soil-layer system

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