人工快速渗滤系统对降雨径流净化效果研究  

Study on Purification Effect of Artificial Rapid Infiltration System on Rainfall Runoff

作　　者：刘素玮 张铁坚[1] 刘俊良[1] LIU Suwei;ZHANG Tiejian;LIU Juniang(School of Urban and Rural Construction,Hebei Agricultural University,Baoding 071000,China)

机构地区：[1]河北农业大学城乡建设学院,河北保定071000

出　　处：《水处理技术》2023年第10期19-24,共6页Technology of Water Treatment

基　　金：河北省水利科研计划项目(2020-55);河北省住房和城乡建设厅建设科技研究项目(2022-2020)。

摘　　要：为提高人工快速渗滤系统的净化效果,选取绿沸石、牡蛎壳、黏土陶粒三种填料对径流中COD、氨氮、总磷等污染物进行等温吸附、动力学吸附试验,并进行Langmuir和Freundlich等温吸附模型拟合。结果表明,Langmuir和Freundlich模型均能较好拟合各填料对径流中各污染物的吸附特征,对氨氮及COD饱和吸附量由大到小依次为:绿沸石>黏土陶粒>牡蛎壳;对总磷饱和吸附量由大到小依次为:牡蛎壳>黏土陶粒>绿沸石。并以牡蛎壳及黏土陶粒作为特殊填料进行小试试验。实验结果表明,新型填料的人工快速渗滤系统对COD、氨氮、总氮、总磷的去除率分别为92.5%、77.4%、77.0%、75.6%,相较于传统填料的人工快速渗滤系统有较好的去除效果,可将牡蛎壳及黏土陶粒作为人工快速渗滤系统的特殊填料。In order to improve the purification effect of the artificial rapid infiltration system,green zeolite,oyster shell and clay ceramsite were selected for isothermal adsorption and dynamic adsorption tests on COD,ammonia nitrogen,total phosphorus and other pollutants in runoff,and Langmuir and Freundlich isotherm adsorption models were fitted.The results show that Langmuir and Freundlich models can better fit the adsorption characteristics of each filler to each pollutant in the runoff.The saturated adsorption capacity of ammonia nitrogen and COD is in the order of green zeolite>clay ceramsite>oyster shell from large to small;The order of saturated adsorption capacity for total phosphorus is:oyster shell>clay ceramsite>green zeolite.The oyster shell and clay ceramsite were used as special fillers in the pilot test.The test results show that the removal rates of COD,ammonia nitrogen,total nitrogen and total phosphorus by the artificial rapid infiltration system with the new filler are 92.5%,77.4%,77.0%and 75.6%respectively,which is better than that by the artificial rapid infiltration system with the traditional filler.The oyster shell and clay ceramsite can be used as special fillers for the artificial rapid infiltration system.

关 键 词：人工快速渗滤系统 黏土陶粒 牡蛎壳 径流污染 净化性能 

分 类 号：X703[环境科学与工程—环境工程]