不同水力负荷率对潜流人工湿地内部污染物迁移转化的影响  

Effects of hydraulic loading rate on the migration and transformation of pollutants in subsurface flowing wetlands

作　　者：张荣新[1] 焦玉恩 傅金祥[1] 刘瑞[1] 梁伦彰 徐静怡 ZHANG Rongxin;JIAO Yu’en;FU Jinxiang;LIU Rui;LIANG Lunzhang;XU Jingyi(School of Municipal and Environmental Engineering,Shenyang Jianzhu University,Shenyang Liaoning 110168;Chongqing Sino France Water Supply Co.,Ltd.,Chongqing 404100)

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168 [2]重庆中法供水有限公司,重庆404100

出　　处：《环境污染与防治》2018年第7期748-754,共7页Environmental Pollution & Control

基　　金：国家水体污染控制与治理科技重大专项(No.2014ZX07202-011);沈阳建筑大学科学研究项目(No.2017024)

摘　　要：为深入研究污染物在潜流人工湿地各填料层内的迁移转化规律,提高潜流人工湿地污染物降解效率,考察了4种进水水力负荷率(HLR,0.15、0.35、0.55、0.80 m^3/(m^2·d))下潜流湿地填料层内部不同区域DO、COD和氨氮浓度分布。结果表明:HLR为0.35m^3/(m^2·d)时,湿地内部DO浓度水平最高,湿地系统污染物处理效果最好,COD、氨氮去除率分别为93.32%、90.16%,COD及氨氮的主要降解区域分别为湿地0~60、0~40cm深度处,60cm深度以下DO水平较低,为污染物降解低效区,可研发新技术提高湿地底层DO水平以提高COD及氨氮去除效果。In order to make clear the migration and transformation status of pollutants in the subsurface constructed wetland,and to improve the degradation efficiency of pollutants in constructed wetlands,this paper analyzed the distribution of DO,COD and ammonia nitrogen in different areas of subsurface flow wetland filling layer under four kinds of influent hydraulic loading rate(HLR,0.15,0.35,0.55,0.80 m 3/(m 2·d)).The test results showed that when HLR was 0.35 m 3/(m 2·d),the DO concentration in wetland was the highest,and the wetland system had the best performance on COD and ammonia nitrogen removal,the removal rates were 93.32%and 90.16%respectively.The main degradation areas of COD and ammonia were at the depth of 0-60 and 0-40 cm respectively.The DO level in constructed wetland of below 60 cm depth was relative low,and this area was low efficient for pollutant degradation.New technologies could be developed to increase the level of DO in the bottom of wetland so as to improve the COD and ammonia nitrogen removal efficiency.

关 键 词：潜流人工湿地 水力负荷率 污染物 

分 类 号：X703[环境科学与工程—环境工程]