摘要
降雨间隔和填料是生物滞留设施污染物净化效果的关键影响因素,研究在不同降雨间隔(2、7 d和15 d)和不同进水污染物负荷条件下,研究了3种不同组合方式填料的生物滞留设施对污染物的净化效果。结果表明:降雨间隔对NO-3-N的去除效果影响最大,降雨间隔越久,越不利于NO-3-N的去除,甚至出现去除率为负的现象;长降雨间隔(15 d)下,CODCr去除率有所降低;氨氮和TP的去除效果受降雨间隔影响较小。锰砂+麦饭石+沸石+土壤混合填料与其余两种组合方式填料相比,能够提升生物滞留设施的抗干旱能力和抗污染物负荷冲击能力,在高降雨间隔(15 d)下能保持较优的CODCr去除率(90%左右)和较稳定的NO-3-N去除能力,在不同污染物负荷下NO-3-N去除率较优(40%以上)。研究结果可为杭州地区生物滞留设施合理设计及应用提供参考。
Rainfall interval and packings are the essential factors impacting on the pollutant purification effectiveness of bioretention facilities.In this study,the performance of bioretention facilities with three different packing combinations on pollutants was investigated under different rainfall intervals(2,7 days and 15 days)and different influent pollutant loading conditions.The results showed that:the rainfall interval had the greatest influence on the removal effect of NO-3-N,the longer the rainfall interval was,the more unfavorable the NO-3-N removal was,and there was even the phenomenon of a negative removal rate.The removal rate of CODCr decreased under long rainfall interval(15 days),and the removal effect of ammonia nitrogen and TP was slightly influenced by rainfall interval.Compared with the rest two packing combinations,manganese sand+maifanite+zeolite+soil hybrid packing could improve the drought resistance and pollutant load impact resistance of bioretention facilities,maintained superior CODCr removal rate(around 90%)and stable NO-3-N removal capacity under high rainfall interval(15 days),and NO-3-N removal rate was higher(more than—143—40%)under different pollutant loads.The study results can provide a reference for the reasonable design and application of biological detention facilities in Hangzhou.
作者
王琦
颉亚玮
王永
谢宇菲
刘宏远
WANG Qi;XIE Yawei;WANG Yong;XIE Yufei;LIU Hongyuan(College of Civil Engineering,Zhejiang University of Technology,Hangzhou 310023,China;Zhejiang Urban Water Industry Association,Hangzhou 310009,China;Zhejiang Urban&Rural Planning Design Institute,Hangzhou 310030,China)
出处
《净水技术》
CAS
2024年第3期143-151,共9页
Water Purification Technology
基金
国家自然科学基金项目(52070111,52170093)
浙江省自然科学基金资助项目(LY22E080010)
关键词
生物滞留设施
组合填料
降雨间隔
污染物负荷
雨水净化
bioretention facility
combined packing
rainfall interval
pollutant load rainwater purification
