Long-term assessment on performance and seasonal optimal operation of a full-scale integrated multiple constructed wetland-pond system

Pu, Yashuai; Li, Yiping; Zhu, Lixin; Cheng, Yu; Nuamah, Linda A.; Zhang, Haikuo; Chen, Hongwei; Du, Guanchao; Song, Congqing

doi:10.1016/j.scitotenv.2022.161219

Cited by 15 publications

(2 citation statements)

References 41 publications

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“…Temperature is a vital factor that significantly influences removal efficiency . The daily average temperature exhibited a positive correlation with the removal efficiency of COD, NH 4 + -N, and TP.…”

Section: Results and Analysismentioning

confidence: 98%

Study on the Effect of AO-Coupled Constructed Wetlands on Conventional and Trace Organic Pollutant Treatment

Cai,

Zeng,

Lin

et al. 2023

ACS Omega

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In this study, a pilot-scale integrated process was developed, which combined the integrated biological contact oxidation technology (AO) and the improved constructed wetland technology. The results showed significant removal efficiency for both conventional and trace organic pollutants. The average removal efficiencies for COD, NH4 +-N, and TP were 78.52, 85.95, and 49.47%, respectively. For trace organic pollutants, triclocarban, triclosan, and sulfadiazine, the removal efficiencies reached 60.14, 57.42, and 84.29%, respectively. The AO stage played a crucial role in removing trace organic pollutants, achieving removal efficiencies of 37.28, 43.44, and 83.82% for triclocarban, triclosan, and sulfadiazine, respectively. Subsequent treatment using improved constructed wetland technology with coal slag + gravel fillers demonstrated the highest removal efficiency, with average efficiencies of 68.66, 63.38, and 81.32% for triclocarban, triclosan, and sulfadiazine, respectively. Correlation analysis revealed positive correlations between temperature, precipitation, and the removal efficiency of COD, NH4 +-N, and TP, while negative correlations were observed with the removal efficiency of triclocarban, triclosan, and sulfadiazine. Furthermore, the influent concentrations of triclocarban and triclosan were significantly negatively correlated with the removal efficiency of COD and TP. The presence of triclocarban and triclosan potentially reduced the microbial diversity and hindered sludge sedimentation performance.

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Section: Results and Analysismentioning

confidence: 98%

Study on the Effect of AO-Coupled Constructed Wetlands on Conventional and Trace Organic Pollutant Treatment

Cai,

Zeng,

Lin

et al. 2023

ACS Omega

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“…At present, the research on organic matter in water mostly focuses on conventional indicators such as chemical oxygen demand (COD) and biochemical oxygen demand (BOD 5 ) [ 8 ], which could only comprehensively reflect the total amount of organic matter in water, and was difficult to further understand the composition of organic matter. Besides the reagents used were easy to cause secondary pollution.…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal evolution of dissolved organic matter (DOM) and its response to environmental factors and human activities

Liu,

Tian,

Chen

et al. 2023

PLoS ONE

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The South-to-North Water Diversion East Project (SNWDP-E) is an effective way to realize the optimal allocation of water resources in China. The North Dasha River (NDR) is the reverse recharge section that receives water from the Yufu River to the Wohushan Reservoir transfer project line in the SNWDP. However, the dissolved organic matter (DOM) evolution mechanism of seasonal water transfer projects on tributary waters has not been fully elucidated. In this paper, the NDR is the main object, and the changes in the composition and distribution of spectral characteristics during the winter water transfer period (WT) as well as during the summer non-water transfer period (NWT) are investigated by parallel factor analysis (PARAFAC). The results showed that the water connectivity caused by water transfer reduces the environmental heterogeneity of waters in the basin, as evidenced by the ammonia nitrogen (NH4+-N) and total phosphorus (TP) in the water body were significantly lower (p<0.05, p<0.01) during the water transfer period than the non-water transfer period. In addition, the fluorescence intensity of DOM was significantly lower in the WT than the NWT (p<0.05) and was mainly composed of humic substances generated from endogenous sources with high stability. While the NWT was disturbed by anthropogenic activities leading to significant differences in DOM composition in different functional areas. Based on the redundancy analysis (RDA) and multiple regression analysis, it was found that the evolution of the protein-like components is dominated by chemical oxygen demand (COD) and NH4+-N factors during the WT. While the NWT is mainly dominated by total nitrogen (TN) and TP factors for the evolution of the humic-like components. This study helps to elucidate the impact of water transfer projects on the trunk basin and contribute to the regulation and management of inter-basin water transfer projects.

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Recent advances and prospects of constructed wetlands in cold climates: a review from 2013 to 2023

Li,

Ren,

Kou

et al. 2024

Environ Sci Pollut Res

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Long-term assessment on performance and seasonal optimal operation of a full-scale integrated multiple constructed wetland-pond system

Cited by 15 publications

References 41 publications

Study on the Effect of AO-Coupled Constructed Wetlands on Conventional and Trace Organic Pollutant Treatment

Study on the Effect of AO-Coupled Constructed Wetlands on Conventional and Trace Organic Pollutant Treatment

Spatiotemporal evolution of dissolved organic matter (DOM) and its response to environmental factors and human activities

Recent advances and prospects of constructed wetlands in cold climates: a review from 2013 to 2023

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