蚯蚓粪-土复合基质的种植屋顶对屋面径流污染的控制效果分析  

Effect Analysis of Planting Roof of Vermicompost-Soil Complex Substrates on Roof Runoff Pollution Control

作　　者：姬婧 汪思颖 刘加强[1] 张林军[1] 刘陟 JI Jing;WANG Siying;LIU Jiaqiang;ZHANG Linjun;LIU Zhi(School of Environmental Engineering,Xuzhou Institute of Technology,Xuzhou 221111,China)

机构地区：[1]徐州工程学院环境工程学院

出　　处：《净水技术》2019年第12期122-125,共4页Water Purification Technology

基　　金：大学生创新创业训练计划项目(XCX2018010);徐州市重点研发课题(KC18148)

摘　　要：蚯蚓粪作为一种优质的有机肥料和土壤改良剂,具有比表面积大、排水性高、持水量大和通气性佳等特点。将蚯蚓粪与田园土以不同比例混配获得蚯蚓粪-土复合基质作为屋顶种植基质,并称含有蚯蚓粪种植基质的屋顶为蚯蚓粪种植屋顶,100%田园土的种植屋顶为普通种植屋顶。结合3场实测降雨事件,研究不同雨强下,不同种植屋顶类型对降雨径流量及水质的控制效果。试验结果表明,相同雨强条件下,蚯蚓粪种植屋顶对降雨径流量及水质的控制效果优于普通种植屋顶优于沥青屋顶,蚯蚓粪种植屋顶随着蚯蚓粪-土的混配比例的减少对径流量及水质的控制效果逐渐减小。随着雨强增加,不同类型的种植屋顶对降雨径流量及水质的控制效果减小。在典型中雨情况下,当蚯蚓粪与土混配的比例为2∶1时,综合效益最优,降雨径流削减率可达40.27%以上,相对于沥青屋顶,其对COD、TP、SS和NH 3-N的削减率依次为44.68%、61.08%、42.03%、52.77%。As a kind of high-quality organic fertilizer and soil amendment,vermicompost has the characteristics of high specific surface area,high drainage,high water holding capacity and good ventilation.Vermicompost and general soil were mixed in different proportions to obtain vermicompost-soil complex media as the planting roofing substrate,and the roof containing vermicompost substrate was called vermicompost planting roof,while ordinary planting roof with 100%general soil.Combined with three measured rainfall events,the effects of different planting roof types on rainfall runoff and water quality under different rainfall intensities were studied.Experimental results showed that under the same rain intensity conditions,control effect on rainfall runoff and water quality was better than that of ordinary planting roofs,while asphalt roofs was the worst.The control effect of runoff and water quality was gradually reduced with the decrease of the proportion of vermicompost-soil complex media.With the increase of rain intensity,control effects of different types of planting roofs on rainfall runoff and water quality were reduced.In the typical moderate rain situation,when the ratio of vermicompost to soil was 2∶1,the comprehensive benefit was optimal,rainfall runoff reduction rate could reach 40.27%or more.Compared with asphalt roof,reduction rates of COD,TP,SS and NH 3-N were 44.68%,61.08%,42.03%and 52.77%,respectively.

关 键 词：种植屋顶 蚯蚓粪 混配比 水量水质 

分 类 号：TU992[建筑科学—市政工程]