净水技术2024，Vol.43Issue(7)：157-166,10.DOI:10.15890/j.cnki.jsjs.2024.07.019
较长时段尺度下4种配方介质土生物滞留系统的运行机制与效能
Operation Mechanism and Efficiency of Bioretention System Constructed with 4 Prepared Media Soil under a Longer Time-Span
摘要
Abstract
In order to explore the operation mechanism and efficiency of bioretention system under a longer timespa,four bioretention systems built with different prepared media soil were designed.The results showed that the four systems still had good removal rate on total nitrogen(TN)and nitrate nitrogen(NO3--N)during a 22-month operating period.When the soil-sand ratio was 7∶3,the depth of the filler layer was 400 mm,7.5%nutrient soil was added,the highest removal rates of ammonia nitrogen,TN,NO3--N,chemical oxygen demand(CODCr)and TP(total phosphorus)appeared,reaching 88.83%,88.89%,93.16%,93.10%and 94.69%,respectively.Different construction methods had an effect on the content of extracellular polymeric substances(EPS)and electron transfer activity(ETSA).The increase of EPS could accelerate the electron transfer rate,thereby improving the denitrification efficiency.Correlation analysis showed that the infiltration rate of the bioretention system was significantly negatively correlated with the removal of TN and NO3--N(p＜0.05),while the protein(PN)and NO3--N were significantly positively correlated with the TN removal rate(p＜0.05).The results provided a technical reference for improving the running efficiency and more scientific construction of bioretention systems.关键词
生物滞留系统/较长时段运行/介质土/机制/效能Key words
bioretention system/longer time-span operation/media soil/mechanism/efficiency分类
建筑与水利引用本文复制引用
王书敏,童愚,马晓慧,谢畔,张成才,李强..较长时段尺度下4种配方介质土生物滞留系统的运行机制与效能[J].净水技术,2024,43(7):157-166,10.基金项目
重庆市住房和城乡建设委员会重庆市建设科技项目(城科字2020第5-1) （城科字2020第5-1）
重庆市教委科学技术研究项目(KJZD-M202001302) （KJZD-M202001302）
