摘要
填料类型对生物滞留系统水质净化效果具有重要影响。通过生物滞留柱试验,以天然土壤、建筑砂为基本填料,以木屑堆肥、沸石和无烟煤为改良材料,研究了种植土砂土比例、种植土中添加木屑堆肥、砂滤层中单独及同时添加沸石和无烟煤等不同填料组合对径流中COD、TP、NH+4-N及NO-3-N的去除效果,并对传统砂土填料及复合填料生物滞留设施在不同进流特征下的水质处理效果进行了系统评价。结果表明:在6种填料组合中,种植土中添加木屑堆肥及砂滤层中同时添加无烟煤和沸石对各污染物的处理效果最好;在7种进流工况下,砂土填料生物滞留设施对COD、TP、NH+4-N、NO-3-N的去除率分别为70.5%~87.5%、50.0%~79.3%、84.7%~96.7%、-110.5%~23.3%,复合填料生物滞留设施的去除率分别为84.0%~93.0%、82.0%~92.0%、80.0%~94.7%、24.3%~90.4%,复合填料生物滞留设施对污染物综合处理效果明显增强,且与传统砂土填料相比,复合填料生物滞留设施受进流特征的影响相对较小。
The type of filler has an important influence to the water purification effect of bioretention system.Through the simulation test of bioretention column,using natural soil and construction sand as basic fillers,sawdust compost,zeolite and anthracite as improved materials,the removal effects of COD(chemical oxygen demand),TP(total phosphorus),NH+4N(ammonia nitrogen)and NO-3N(nitrate nitrogen)by different filler combinations(the sand and soil ratio of planting soil,adding sawdust compost to planting soil,adding zeolite and anthracite separately and simultaneously in sand filter)were studied and the water treatment effect of bioretention of traditional sand filler and composite filler under different inflow characteristics was evaluated.Based on the results,in the six filter combinations,adding sawdust compost in planting soil and simultaneously adding anthracite and zeolite in sand filter layer has the best treatment effect on each pollutant.Under seven inflow conditions,the concentration removal rates of COD,TP,NH+4N and NO-3N by traditional sand and soil fillers bioretention are 70.5%87.5%,50.0%79.3%,84.7%96.7%and-110.5%23.3%respectively,while the concentration removal rates by composite fillers bioretention are 84.0%93.0%,82.0%92.0%,80.0%94.7%and 24.3%90.4%respectively.The comprehensive treatment effect of bioretention system with composite fillers on pollutants is obviously enhanced.In addition,compared with traditional sand and soil fillers bioretention,the influence of inflow characteristics to the treatment effect of runoff pollutants of composite fillers bioretention is relatively less.
作者
潘俊奎
刘燕
屈昱安
高建平
张续光
PAN Junkui;LIU Yan;QU Yu’an;GAO Jianping;ZHANG Xuguang(School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;School of Economics and Management,Chongqing Jiaotong University,Chongqing 400074,China;Chongqing Vocational College of Architectural Engineering,Chongqing 400072,China)
出处
《人民黄河》
CAS
北大核心
2020年第8期93-99,共7页
Yellow River
基金
重庆市自然科学基金资助项目(cstc2018jcyjAX0445,cstc2019jcyj-msxmX0694)
重庆市教委科研基金资助项目(KJQN201904302)。
关键词
生物滞留
径流污染
复合填料
去除率
bioretention
runoff pollution
composite filler
removal rate
