不同覆盖度生态浮床净化污染水体的效果

Purification effects of different-coverage ecological floating beds on water pollution

利用生态浮床处理富营养化水体,结果表明:生态浮床对水体中总氮(TN)、总磷(TP)、高锰酸盐指数(CODMn)和五日生化需氧量(BOD5)的去除效果均较高,可达75%以上;除TP外,各处理的TN、CODMn、BOD5去除率与覆盖度呈正相关;TP因初始浓度较低,试验终期各覆盖度处理间去除率基本无差异;各处理的溶解氧(DO)含量以0%覆盖度上升最明显,其他处理增幅较小,且呈现覆盖度越高,DO增幅越小的特点。

The eutrophic water was treated by ecological floating bed. The results showed that the removal effects of TN,TP, CODMn and BOD; were higher, reached more than 75 %;the removal rates of TN,CODMn and BOD5 were positively correlated with coverage, except TP;the TP removal rates at the end of experiment had no difference among the coverage treatments because of lower initial concentration. Compared with other treatments, the DO content with 0% coverage increased obviously, and with the coverage increased, the DO increment was smaller.