垂直流芦苇床过滤器在改善地表水质中的表现

Performance of the Vertical Flow Reed-Bed Filter in Improving Surface Water Quality

关键词:  过滤器  芦苇  水质  磷  正磷酸盐  土壤分析

Key words:  filter  reed-bed  water quality  phosphorus  ortho-phosphate  soil sample analysis

摘要:

2007年8月在荷兰莱顿赖恩市垂直流芦苇床过滤器改善地表水水质试验系统,选定1个大型过滤器(ZFLR-1)和2个小型过滤器(ZFLR-3h和ZFLR-4h)实地采集10个水份样本和36个土壤样本分析其中总磷和正磷酸盐含量变化,了解垂直芦苇床过滤器对磷有效去除产生的直接影响。结果表明,所有水样经过滤器处理后总磷和正磷酸盐系数都比进入过滤器前的水样降低,过滤器对磷有较高的去除率。在采集水样的3个过滤器中,过滤器ZFLR-3h有最高的总磷和正磷酸盐去除率。土壤样本分析得出芦苇床过滤器主要通过吸附作用去除水中的磷成分,过滤器不同吸附物质组成对磷去除有直接影响。

Abstract:

A full scale experimental vertical flow reed bed filter was designed to undertaken in Leidsche Rijn for three years.In Aug.2007, ten water samples were collected from one big filter (ZFLR-1) and two small filters (ZFLR-3h, ZFLR 4h) on the field.Those filters were selected before sample collection.At the same time, thirty-six soil samples were also collected.The purpose of this project is aim to analyze change of TP and Ortho-phosphate concentration from influent to effluent and to understand that filters have influence on phosphorus removal.The laboratory analyses assume the phosphorus removal that has been controlled effectively as the concentration of TP and Ortho-phosphate of effluent is smaller than influent in filters.Filter ZFLR-3h has the highest phosphorus removal percentage on three chosen filters.The objectives of soil sample analysis are to measure phosphorus removal through vertical flow reed bed filter mainly by adsorption.The concentration of iron and calcium is crucial to phosphorus removal because they are added as adsorbent media.