生物滞留系统的水文效应与污染物的去除研究

通过调查生物滞留系统发现,系统水文效应主要与系统土壤结构、设计深度,填料配比及渗透性能、设施表面积与排水面积的比值、气候等因素相关。系统脱氮除磷效果与填料特性、饱和区控制和水力停留时间等因素密切相关,TSS去除率通常可达60%,粪大肠菌、大肠杆菌去除率可达约70%,而金属离子的去除则与植被种类密切相关。

STUDY ON HYDROLOGICAL EFFECTS AND POLLUTANT REMOVAL OF BIORETENTION SYSTEMS

By studying bioretention system，it was found that the system's hydrological effect was mainly concerned with soil structure，the depth of design system，filling ratio，permeability，the ratio of facilities surface area to drainage area，climate and other relevant factors． Its nitrogen and phosphorus removal effience was relevent to the properties of the fillers，the saturated zone control，hydraulic retention time and other factors． The removal rate of TSS was usually up to 60%，fecal coliform，escherichia coli removal rate could reach about 70%． Metal ion removal and vegetation types were closely related．