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| Nutrient Removal Rates from Swine Wastewater Using Periphyton-Vallisneria Natan |
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| KeyWord:periphyton; Vallisneria natan; nutrients; removal efficiency; adverse stress |
| Author Name | Affiliation | | GU Xin-yue | College of Life Sciences, South-Central University for Nationalities, Wuhan 430074, China | | HE Yue | College of Life Sciences, South-Central University for Nationalities, Wuhan 430074, China | | ZHANG Xiu-qing | College of Life Sciences, South-Central University for Nationalities, Wuhan 430074, China | | WANG Qing | College of Life Sciences, South-Central University for Nationalities, Wuhan 430074, China | | PEI Guo-feng | College of Life Sciences, South-Central University for Nationalities, Wuhan 430074, China |
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| Abstract: |
| Water plants are often used to remove nutrients from wastewater. This research was conducted to assess the efficiency of nutrient removal from swine wastewater using biological treatment system in a laboratory-scale experiment with periphyton and submerged macrophyte-Vallisneria natan during 32 days. The systems included high, medium and low concentrations of nutrients in wastewater. The maximum removal rates of chemical oxygen demand（COD） were more than 86% at high concentrations. The average phosphorus（P） and nitrogen（N） removal rates were respectively over 62% and 70% for both high and medium concentrations in mixed nutrient systems, greater than in single nutrient systems（59% and 65%）. Changes of physiological activities showed that V. natan suffered a short-term stress at high nutrient concentrations. However, such stresses could be alleviated by the presence of periphyton. In conclusion, the optimum condition for V. natan would be medium concentrations of nutrients with periphyton. |
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