基于初期雨水径流氮磷去除效果的生物滞留设施填料层研究  

Filling Layer's Optimal Ratio of Bioretention Facilities Based on Removal Effect of Nitrogen and Phosphorus in Initial Rainwater Runoff

作　　者：张彤 冯燕[1] 何明智 古正刚 柏茜 ZHANG Tong;FENG Yan;HE Ming-zhi;GU Zheng-gang;BAI Xi(Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650504, China;Kunming Hengchang Real Estate Co., Ltd, Kunming 650100, China;Yunnan Vocational College of Transportation, Kunming 650503, China)

机构地区：[1]昆明理工大学建筑工程学院,云南昆明650504 [2]昆明恒畅置业有限公司,云南昆明650100 [3]云南交通运输职业学院,云南昆明650503.

出　　处：《中国农村水利水电》2020年第6期82-86,共5页China Rural Water and Hydropower

基　　金：昆明理工大学引进人才科研启动基金项目(KKSY201506058)。

摘　　要：针对生物滞留设施对于初期雨水径流中磷与氨氮去除效果不佳的问题,设置了四组填料层改良装置。装置填料层中沙砾、红壤土、钢渣-稻壳炭组合填料比例分别为:1号,80%∶10%∶10%;2号,80%∶3%∶17%;3号,90%∶3%∶7%;4号,85%∶5%∶10%。通过实验室模拟降雨初期径流,测得装置出水中磷与氨氮浓度、pH和装置的渗透系数,以确定改良型生物滞留设施去除磷与氨氮的去除效果,以及填料层的最优比例。研究结果表明:钢渣-稻壳炭组合填料对磷与氨氮的去除具有提升作用;4号装置去除磷与氨氮效果稳定,平均去除率大于85%,且出水pH以及渗透系数都符合相关规定,故选取沙砾、红壤土、组合填料比例为:85%∶5%∶10%为基质改良型生物滞留设施的最佳填料比。In order to solve the problem of poor removal of phosphorus and ammonia nitrogen in runoff by bioretention facilities,four groups of filling layer improvement devices are installed.The ratios of gravel,red loam,steel slag and rice husk carbon in the packing layer of the device are:1#,80%∶10%∶10%;2#,80%∶3%∶17%;3#,90%∶3%∶7%;4#,85%∶5%∶10%.By using the laboratory simulation of rainfall runoff,the phosphorus and ammonia nitrogen concentration,pH and the permeability coefficient of the four devices are measured to determine the best removal rate of phosphorus and ammonia nitrogen in the modified bioretention devices,and the optimal ratio of the filler layer.The results show that the combination of steel slag and rice hull carbon has an effect on the removal of phosphorus and ammonia nitrogen.The removal of phosphorus and ammonia nitrogen in the 4#device is stable,the average removal rate of phosphorus and ammonia nitrogen is more than 85%,and the effluent pH and permeability coefficients are in compliance with relevant regulations.The proportions of gravel,red loam and combined filler are selected as 85%and 5%.10%is the optimum filler ratio of modified bioretention facilities.

关 键 词：海绵城市 生物滞留设施 组合填料 填料层比例 磷 氨氮 

分 类 号：TV121[水利工程—水文学及水资源] X53[环境科学与工程—环境工程]