Effect and Mechanism of the Integrated Ecological Floating Bed on Eutrophic Water Treatment
Publication: Journal of Environmental Engineering
Volume 147, Issue 8
Abstract
A series of floating beds consisting of biounits were constructed for eutrophic water treatment in the field. Dynamic changes in water quality under each treatment were monitored to investigate treatment performance, and the mass balances of nitrogen (N) and phosphorus (P) in the integrated ecological floating bed (IEFB) were studied to reveal the interaction mechanisms operating within the beds. Water quality improvement was examined under different biounit arrangements to optimize configuration parameters. The test results showed that the concentrations of total nitrogen (TN) and total phosphorus (TP) declined linearly during the first 6 days, and the highest removal of TN (58.9%) and TP (59.1%) was observed in the IEFB, in which TN and TP removal rates reached up to 0.407 and , respectively. The mass balance analysis of N/P indicated that TN was mainly removed through microbial denitrification (72.5%), with sedimentation accounting for 59.1% of TP removal. Compared with each independent biounit, the IEFB composed of multiple biounits exhibited superior performance in eutrophic water purification. The removal of N and P in the IEFB mainly depended on the bacteria and algae attached to the artificial carrier medium. Meanwhile, the aquatic animal unit enhanced the removal efficiency of TN and TP from the water by means of inorganization of particle N and P, which simultaneously improved water diaphaneity.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This work was supported by the National Natural Science Foundation of China (No. 42077108) and Scientific Research Program Funded by Shaanxi Provincial Education Department (No. 20JK0783).
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Published In
Journal of Environmental Engineering
Volume 147 • Issue 8 • August 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Nov 11, 2020
Accepted: Mar 10, 2021
Published online: May 26, 2021
Published in print: Aug 1, 2021
Discussion open until: Oct 26, 2021
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