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| Effect of temperature on the ecological floating bed system |
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Abstract In order to investigate the effect of temperature on the ecological floating bed system, the ecological floating bed was constructed to treat heavily polluted river water of Linjiang River. The temperature influenced the ecological floating bed system significantly, among which the effect on the purification of TN and TP could be best described as a notably parabolic relationship. The removal efficiencies of TN and TP increased significantly with the increase in the water temperature from 2 to 29℃, but exhibited a decreasing trend with the increase in temperature was higher than 29℃. In addition, temperature showed a greater effect on TN removal than on TP removal. The optimal operating temperature of the ecological floating bed was 25~29℃, when the average height of plants was 209.9 cm, the average amounts of nutrient storage in plant tissues was 69.84 g/m2 for nitrogen,19.73 g/m2 for phosphorus; and the removal efficiencies of TN and TP were 38.7%~44.1%, 38.6%~43.6%, respectively.
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Received: 08 September 2009
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