植物净化床对双龙湖水体有机污染物的去除效果分析

Analysis of the efficiency of organic contamination removal by planting purify beds in Shuanglong Lake

通过对双龙湖A、B两座植物净化床2004年6月至2005年5月间的进出水监测数据进行分析,确定植物净化床对水体有机污染物去除效果的年际变化。结果表明,A、B两座植物净化床对CODMn、总磷(TP)、氨氮(NH3-N)、总氮(TN)均有很好的去除效果,对CODMn的平均去除率为71.41%和72.58%,出水水质平均为2.47和2.36mg·L-1;TP的平均去除率为83.01%和84.70%,出水水质平均为0.033和0.037mg·L-1;NH3-N的平均去除率为89.28%和90.30%,出水水质平均为0.125和0.141mg·L-1;TN的平均去除率为60.90%和65.48%,出水水质平均为1.204和1.268mg·L-1。对硝态氮(NO3-N)的去除效果较差,平均去除率为6.91%和32.47%,出水水质平均为0.407和0.637mg·L-1。分析CODMn、TP、NH3-N、TN和NO3-N去除效果的季节变化发现,各指标的去除效果和季节变化有一定关系。最后,作者对植物净化床的运行控制提出了相关建议。

To evaluate pollutants removal capacity of organic contamination removal of planting purify beds, through water quality analysis of the two planting purify beds A ＆ B that collected from June 2004 to May 2005. The results showed that the two planting purify beds could effectively reduce output of chemical oxygen demand （ CODMn ）, Total Phosphorous （ TP ）, NH3-N, Total Nitrogen （ TN ） . The average removal ratio of CODMn, TP, NH3-N and TN by the beds A ＆ B is 71.41% and 72.58%, 83.01% and 84.70%, 89.28% and 90.30%, and 60.90% and 65.48% respectively; And the average effluent quality of CODMn, TP, NH3-N and TN is 2.47 and 2.36 mg·L^-1, 0.033 and 0.037 mg·L^-1, 0.125 and 0.141 mg·L^-1, 1.204 and 1.268 mg·L^-1 respectively. The effectively reduce output of NO3-N is not better, and average removal ratio by the beds A ＆ B is 6.91% and 32.47%, and the average effluent quality is 0.407 and 0.637 mg·L^-1 respectively. Annual variation analysis showed that CODMn, TP, NH3-N, TN and NO3-N reduction efficiencies displayed seasonal variations. Finally, the author proposed the correlation suggestion for the planting purify bed＇s running control.