摘要
河道滞留塘系统是一项适用于中小型污染河流净化的生态技术,目前我国部分中小型河流污染严重,研究河道滞留塘系统对河流污染物的去除特性具有现实意义,但目前尚缺乏系统深入的研究。该研究对实际污染河水进行了一年现场试验研究,通过改变水力停留时间,考察了不同季节、不同河水水质条件下河道滞留塘系统对河水中氨氮(NH3-N)和总磷(TP)的净化效果。结果表明,河道滞留塘系统主要通过颗粒物的重力沉降作用净化河水中的总磷(TP)。在该研究条件下,TP去除率接近30%,去除速率为0.01～0.02 g.h-1.m-2。TP去除速率约为0.003倍的SS去除速率,两者间有较好的相关关系,因此可通过测定滞留塘SS去除速率来预测TP去除速率。但滞留塘系统对NH3-N无显著去除能力。
On-stream detention pond system （OSDPS） is an ecological technology, which is suitable and promising for purification restoration of polluted small-scale streams in China. Studying pollutants removal performance of OSDPS is meaningful. Field study of OSDPS was carried out, in which Hydraulic Retention Time （HRT） was changed and pollutants removal was detected. The results showed that particle settling was the main mechanism of removal of Total Phosphorous （TP）. About 30% TP were removed after OSDPS purification and removal rate of TP varied between 0.01 - 0.02g·h^-1·m^-2. Moreover, removal rate of TP showed an obvious correlation with Suspended Solids （SS）. Removal rate of TP was about 0.003 times as that of SS. So the removal rate of TP could be predicted by testing the removal rate of SS. However, the removal of NH3-N in OSDPS was not obvious.
出处
《生态环境》
CSCD
北大核心
2006年第1期11-14,共4页
Ecology and Environmnet
基金
国家"十五"重大科技专项(2003AA601080)
