长期运行无植物生物滞留池的渗透及脱氮性能  

Permeability and Denitrification Performance of Unplanted Bioretention Cells with Long-Term Operation

作　　者：齐明亮 刘全諹 王亚军[2] QI Mingliang;LIU Quanyang;WANG Yajun(Gansu Academy of Eco-environmental Sciences,730000;School of Civil Engineering,Lanzhou University of Technology,730050:Lanzhou,China)

机构地区：[1]甘肃省生态环境科学设计研究院,730000 [2]兰州理工大学土木工程学院,甘肃兰州730050

出　　处：《水处理技术》2021年第10期29-32,共4页Technology of Water Treatment

基　　金：国家自然科学基金项目(41967043);甘肃省自然科学基金项目(20JR5RA461);甘肃省高等学校产业支撑引导项目(2020C-40)。

摘　　要：为探究长期污水处理条件下无植物生物滞留池(BRC)渗透性能及脱氮性能之间的变化规律,通过对系统渗透系数及氮素含量变化的长期监测考察其相关性。结果表明,无植物生物滞留池在长期污水处理运行过程中,TN去除率随着渗透系数的降低而降低,当渗透系数稳定在0.14~0.16 mm/s时,TN去除率最高,仅达到34%;对于COD和TP等其他污染物相去除率对稳定,分别在82.5%和97.5%。比较而言,氮素较低的去除率成为BRC系统的主要约束性指标。本研究结果可为通过提高渗透性能增强生物滞留池的脱氮性能提供参考和借鉴。In order to explore the variation between the permeability and denitrification performance of bioretention cells(BRC) under long-term sewage treatment conditions, the correlation was investigated through long-term monitoring of the system permeability coefficient and nitrogen content changes.The results showed that the TN removal rate of the bioretention cells decreased with the decrease of the permeability coefficient during the long-term sewage treatment operation. When the permeability coefficient was stable at 0.14~0.16 mm/s, the TN removal rate was the highest, reaching only 34%.The removal rate of other pollutants such as COD and TP was stable at 82.5% and 97.5%, respectively. In comparison, the lower nitrogen removal rate had become the main binding indicator of the BRC. The research results can provide references for enhancing the denitrification performance of BRC by improving permeability.

关 键 词：生物滞留池 渗透系数 基质堵塞 脱氮性能 

分 类 号：X703.1[环境科学与工程—环境工程]