曝气方式对复合人工湿地处理城镇生活污水的影响  

Effect of Aeration Mode on Treatment of Urban Domestic Sewage by Hybrid Constructed Wetland

作　　者：闫飞龙 王怡[1] 王文怀 张恒[1] 寇晓梅[2] 吴世璋 邵甜 牛乐[2] YAN Fei-long;WANG Yi;WANG Wen-huai;ZHANG Heng;KOU Xiao-mei;WU Shi-zhang;SHAO Tian;NIU Le(School of Environmental and Municipal Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;PowerChina Northwest Engineering Corporation Limited,Xi’an 710065,China)

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055 [2]中国电建集团西北勘测设计研究院有限公司,陕西西安710065

出　　处：《中国给水排水》2021年第19期85-90,共6页China Water & Wastewater

基　　金：陕西省重点产业创新链(群)项目(2021ZDLSF05-04);西安市科技局社会发展科技创新示范项目(20SFSF0011)。

摘　　要：针对人工湿地直接处理生活污水时存在供氧不足及其导致的对碳、氮污染物去除效果差的问题,通过组合垂直流人工湿地(VFCW)和水平流人工湿地(HFCW)构建了复合人工湿地(HCW),探究了曝气方式对HCW处理实际生活污水效果的影响,并对HCW系统中污染物的净化机理进行了解析。结果表明,当水力负荷为0.0945 m^(3)/(m^(2)·d)、气水比为6.5∶1时,在连续曝气和间歇曝气方式下,HCW均可实现对生活污水的较好处理。与连续曝气相比,间歇曝气更有利于系统中TN的去除,其出水COD、SS、TN和NH_(4)^(+)-N浓度均可稳定达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)中的一级A标准。HCW中污染物沿程变化规律表明,VFCW上部属于复合系统的高效能区,可实现大部分污染物的去除;其余区域作为复合系统的水质提升区,使得污染物得到进一步净化,从而保证了HCW对城镇生活污水的高效稳定处理。There is a problem of poor carbon and nitrogen removal efficiency caused by insufficient oxygen supply when the domestic sewage is directly treated by the constructed wetland.A hybrid constructed wetland(HCW)was built by combining a vertical-flow constructed wetland(VFCW)and a horizontal-flow constructed wetland(HFCW).Moreover,the effect of aeration mode on the treatment of urban domestic sewage by the HCW was explored,and the purification mechanism of the pollutants in the HCW system was analyzed.When the HLR and gas-water ratio were 0.0945 m^(3)/(m^(2)·d)and 6.5∶1,both the continuous aeration and intermittent aeration could achieve better removal performances of the domestic sewage in the HCW system.Compared with the continuous aeration,the intermittent aeration was more conducive to TN removal in the HCW system,and COD,SS,TN and NH_(4)^(+)-N in the effluent could stably reach the first level A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002).The variations in pollutant concentrations along the HCW system indicated that the upper part of the VFCW belonged to the high-efficiency area of the HCW system and could remove most of the pollutants in the domestic sewage.The other areas of the HCW system served as the water quality improvement areas,which further purified the pollutants in the system,thus ensuring the efficient and stable treatment of the urban domestic sewage by the HCW.

关 键 词：复合人工湿地 城镇生活污水 连续曝气 间歇曝气 高效能区 水质提升区 

分 类 号：TU992[建筑科学—市政工程]