人工水草技术对北运河城区段水质净化效果分析  

Analysis on Water Purification Effect of Artificial Aquatic Plant Technology in the Urban Section of North Canal

作　　者：刘然 李绍飞 王冰 胡韵爽 董立新[2] LIU Ran;LI Shaofei;WANG Bing;HU Yunshuang;DONG Lixin(College of Hydraulic Engineering,Tianjin Agricultural University,300384;Tianjin Water Conservancy Research Institute,300061:Tianjin,China)

机构地区：[1]天津农学院水利工程学院,300384 [2]天津市水利科学研究院,天津300061

出　　处：《水处理技术》2023年第1期113-117,共5页Technology of Water Treatment

基　　金：“十三五”国家水体污染控制与治理重大专项“北运河城区段水质改善技术与示范”(2017ZX07106003);天津市研究生创新项目(2021YJSS134)。

摘　　要：针对北运河城区段水质污染特征,优选人工水草、优化运行参数,为后续示范工程中的人工水草工艺提供设计依据。选取市面常见的三种人工水草,开展挂膜试验及不同浓度的污水净化试验,优选人工水草。模拟北运河河道水流,分析水力停留时间、运行体积比、挂膜方式及进水浓度等不同运行参数,对水质净化效果的影响。超细碳纤维对高浓度污水中氨氮、总磷和COD的水力负荷参数分别为1.12、0.13、12.71 mg/(L·h),对中、低浓度污水中氨氮的水力负荷参数分别为0.58、0.40 mg/(L·h),是优势人工水草。综合考虑净化效果和工程造价,在后续北运河城区段示范工程中,人工水草工艺的设计运行参数为:城区段河道自然挂膜、水力停留时间7 h、运行体积比25%。河道进水浓度越高,净化效果越好。According to the water pollution characteristics of the urban section of the North Canal,the artificial aquatic plants were preferably selected and the operating parameters were optimized to provide a design basis for the artificial water plant process in the subsequent demonstration project.Three kinds of artificial aquatic plants commonly found in the market were selected to carry out the hanging membranes tests,and different concentrations of sewage purification were tested to optimize the artificial aquatic plants.The effects of different operating parameters on the water purification were analyzed by simulating the flow in the North Canal,such as hydraulic retention time,operating volume ratio,hanging membranes method,and inlet concentration.The hydraulic loading parameters of ultrafine carbon fiber for NH_(3)-N,TP,and COD in the high-concentration sewage were 1.12,0.13 and 12.71 mg/(L·h),respectively.The hydraulic load parameters of NH3-N in medium and low-concentration sewage were 0.58 mg/(L·h)and 0.40 mg/(L·h),respectively.Considering the purification effect and project cost comprehensively,the design operation parameters of the artificial water grass process in the subsequent demonstration project of North Canal City are as follows:natural hanging membrane,hydraulic retention time of7 h,and operation volume ratio of 25%.The higher the inflow concentration of river water,the better the purification effect.

关 键 词：人工水草 优选 运行参数 北运河 水力停留时间 运行体积比 

分 类 号：X522[环境科学与工程—环境工程]