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Removal of nitrogen from rainwater runoff by bioretention cells filled with modified collapsible loess
Ecological Engineering ( IF 3.8 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.ecoleng.2020.106065
Jiaqing Xiong , Jiajia Zhou , Jianqiang Li , Guoqing Sun , Xiaochang C. Wang , Shengxia An , Wanqin Li , Jie Wang

Abstract The construction of bioretention facilities in collapsible loess areas faces some problems such as low infiltration rate of rainwater runoff and system blockage, which seriously affect the treatment effect of bioretention cell on rainwater runoff. According to the different filler matrix, three bioretention cells with improved filler were constructed, the 1# bioretention system was filled with 50% of the construction waste mixed with 50% loess, and the 2# bioretention system was filled with 50% concrete sand mixed with 50% loess, the 3# bioretention system was filled with 45% concrete sand +10% wood chips +45% loess mixed in the bioretention cell. The results show that the removal rate of NH4+-N is the highest when the height of the inundation zone of the bioretention cell is 600 mm (more than 98%). The change of hydraulic load and submerged zone height had a significant effect on the removal rate of NO3−-N in bioretention cell (P

中文翻译:

填充改性湿陷性黄土的生物滞留池去除雨水径流中的氮

摘要 湿陷性黄土地区生物滞留设施建设面临雨水径流入渗率低、系统堵塞等问题,严重影响了生物滞留池对雨水径流的处理效果。根据不同的填料基体,建造三个改进填料的生物滞留单元,1#生物滞留系统填充50%建筑垃圾掺50%黄土,2#生物滞留系统填充50%混凝土砂混合3#生物滞留系统用50%黄土填充45%混凝土砂+10%木屑+45%黄土混合在生物滞留室中。结果表明,当生物滞留池淹没区高度为600 mm时,NH4+-N的去除率最高(98%以上)。
更新日期:2020-12-01
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