| 论文标题： | |
|---|---|
| 作者： | |
| 出版刊物： | |
| 出版日期： | |
| 出版年份： | |
| 卷/期： | |
| DOI： | |
| 论文摘要： | Stormwater runoff greatly contributes to surface water pollution and deterioration of aquatic environment in urban areas. Biofilter, as low impact development (LID) technology, has been widely applied in controlling urban runoff pollution in recent years. A multi-layered biofilter with a saturated zone was employed in this study to test its removal efficiency of pollutants and the effect of saturation time on its performance with the real road runoff. Two groups of columns were built with different vegetations (Zoysia matrella, ZM and a combination of Iris pseudacorus and Z matrella, IZ). During a 2.5-month duration, five times of runoff dosing trials with collected stormwater were conducted at a load of 20-25 L day(-1). All filter systems had effective retention of particulate matters, with the turbidity removals of over 95%. The IZ group performed more efficiently than ZM systems in the removal of total phosphorus (TP), ammonia (NH4-N), nitrate (NO3-N) and turbidity. The mean removal of total nitrogen (TN) and TP was 49.8 +/- 23.8% and 74.8 +/- 9.9% in IZ group, and 42.6 +/- 22.0% and 66.4 +/- 12.2% in ZM group. Saturation time had significant effect on the removal of TN, TP and turbidity, whose concentrations declined with the saturation duration. The performances of biofilters were dynamic, as a function of media depth and retention time. The configuration of saturated zone and optimized depth of media layers (at least 0.75 m) can provide a favorable condition for nitrogen removal under random inflow condition. (C) 2017 Elsevier B.V. All rights reserved. |
以下内容与「星空体育彩票官网正规渠道」同属公开资讯，可按栏目接着查阅相关条目。
本站按公开材料组织页面。需要原文时请核对应栏目发布页。
若从搜索引擎进入，可先确认当前栏目名称，再按需打开相关阅读。
