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| Comparison of purification ability of aquatic plants under different concentrations of nitrogen and phosphorus in tailrace of livestock wastewater |
| Received:July 16, 2020 |
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| KeyWord:aquatic plants;floating island;nitrogen and phosphorus;purification ability;livestock wastewater |
| Author Name | Affiliation | E-mail | | FENG You | Qilu University of Technology(Shandong Academy of Sciences), Shandong Analysis and Test Center, Key Laboratory for Applied Technology of Sophisticated Analytical Instrument of Shandong Province, Jinan 250014, China | | | CHEN Qing-feng | Qilu University of Technology(Shandong Academy of Sciences), Shandong Analysis and Test Center, Key Laboratory for Applied Technology of Sophisticated Analytical Instrument of Shandong Province, Jinan 250014, China
College of Geography and Environment, Shandong Normal University, Jinan 250014, China | chensdcn@163.com | | LI Jin-ye | Qilu University of Technology(Shandong Academy of Sciences), Shandong Analysis and Test Center, Key Laboratory for Applied Technology of Sophisticated Analytical Instrument of Shandong Province, Jinan 250014, China | | | GUO Bei-bei | Qilu University of Technology(Shandong Academy of Sciences), Shandong Analysis and Test Center, Key Laboratory for Applied Technology of Sophisticated Analytical Instrument of Shandong Province, Jinan 250014, China | | | LIU Ting | Qilu University of Technology(Shandong Academy of Sciences), Shandong Analysis and Test Center, Key Laboratory for Applied Technology of Sophisticated Analytical Instrument of Shandong Province, Jinan 250014, China | | | LI Lei | Qilu University of Technology(Shandong Academy of Sciences), Shandong Analysis and Test Center, Key Laboratory for Applied Technology of Sophisticated Analytical Instrument of Shandong Province, Jinan 250014, China | |
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| Abstract: |
| In order to screen the dominant species of ecological floating island suitable for different concentrations of nitrogen and phosphorus in tailrace of livestock and poultry wastewater, 5 kinds of effluents, such as Oenanthe javanica, Eichhornia crassipes, Iris sibirica, Thalia dealbata, and Iris pseudacorus and 3 kinds of submerged plants, such as Myriophyllum verticillatum, Elodea nuttallii, and Ceratophyllum demersum were selected. The growth characteristics of these 8 plants under different concentrations of nitrogen and phosphorus and their removal efficiency of ammonia nitrogen, total phosphorus, and chemical oxygen demand(COD) in water were investigated using simulation experiments. Curve regression and Principal Component Analysis were carried out to obtain the comprehensive evaluation of plant purification function. Results showed that the removal ability of Eichhornia crassipes and Thalia dealbata was significantly higher than that of other aquatic plants at low concentration of nitrogen and phosphorus(NH4+-N:80~120 mg·L-1, TP:8~16 mg·L-1). Oenanthe javanica and Iris pseudacorus had significant advantages in removing high concentration of nitrogen and phosphorus (NH4+-N:180~220 mg·L-1, TP:30~35 mg·L-1)and also had good adaptability. Myriophyllum verticillatum had better purification effect on submerged plants, and its biomass increased significantly(P<0.05). Although Eichhornia crassipes has good purification capacity, it can easily cause secondary environmental problems; therefore, it is advisable to choose carefully and adjust measures according to local conditions. |
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