巢湖市东环城河底泥释放特性研究

Study on Characteristics of the Sediment Release in the East of the Round-the-city River in Chao Hu

本次实验在室内静态模拟条件下,研究不同的温度和溶解氧浓度水平下巢湖市东环城河底泥COD、NH3-N、TN和TP释放特性。结果表明:温度为20℃时,COD释放量最大,10℃时最小。厌氧状态下COD释放量远大于好氧状态;随着温度的升高,底泥NH3-N、TN、TP释放量不断增大,上覆水中溶解氧浓度逐渐降低,底泥NH3-N、TN、TP释放量逐渐增加;上覆水体NH3-N含量与TN浓度呈正相关。

Under the condition of indoor static simulation, this experiment researches the properties of sediment in the east of the round-the-city river in Chao Hu release COD. NH3-N, TN and TP, at different temperatures and dissolved oxygen concentration levels. Results show that： when the temperature is 20℃ ,the quantity of sediment release COD reaches a maximum, the 10℃ is minimum. And the quantity of releasing COD in anaerobic condition is far greater than the aerobic condition. With the increase of temperature, the release of NH3 - N. TN. TP in sediment continuously increased, and when the overlying water dissolved oxygen concentration decreases gradually, the quantity of Sediment release NH3-N. TN. TP is gradually increasing. The correlation with NH3-N content and concentration of TN are positively significant.