摘要
以初滤池、垂直流人工湿地、光催化反应池构建的复合系统为研究对象,设计进水水质为低污染水,针对湿地设置3种水力负荷(0.8、1.2、2.0 m^(3)·m^(-2)·d^(-1)),针对光催化反应池设置3种因素3个水平[紫外光照时间(3、6、9 h)、pH(4、6、8)及曝气量(0、2.5、5.0 L·min^(-1))]的正交试验,研究该系统对低污染水中氨氮(NH_(4)^(+)-N)、总氮(TN)、正磷(PO_(4)^(3-)-P)和总磷(TP)的去除效果.结果表明:(1)湿地在1.2 m^(3)·m^(-2)·d^(-1)水力负荷下对NH_(4)^(+)-N、TN、PO_(4)^(3-)-P和TP的去除率分别为54.73%、63.52%、75.66%和47.27%,对污染物具有较好的去除效果;(2)光催化材料表面的TiO2纳米颗粒可为材料中催化剂的稳定性提供条件;(3)当光催化反应器pH为8、曝气量为2.5 L·min^(-1)、光照时间为9 h时,该复合系统对TP的去除率达65.00%,比单一垂直流人工湿地在1.2 m^(3)·m^(-2)·d^(-1)水力负荷下的去除率(47.27%)提高了17.73%.该研究可为低污染水的治理和生态修复提供参考.
In order to study the purification effect of a combined system of primary filter, vertical flow constructed wetland and photocatalytic reactor on low-polluted water, removal rates of total nitrogen(TN), NH_(4)^(+)-N, total phosphorous(TP) and PO_(4)^(3-)-P were measured under 3 hydraulic loads(0.8, 1.2 and 2.0 m^(3)·m^(-2)·d^(-1)). And an orthogonal test with 3 factors under 3 levels [ultraviolet irradiation time(3, 6 and 9 h), pH value(4, 6 and 8) and aeration rate(0, 2.5 and 5.0 L·min^(-1))] was established for the photocatalytic reactor. The results showed that(1) under the hydraulic load of 1.2 m^(3)·m^(-2)·d^(-1), the removal rates of the system on NH_(4)^(+)-N, TN, PO_(4)^(3-)-P and TP were 54.73%, 63.52%, 75.56% and 47.27%, respectively, demonstrating good purification effect on the pollutants.(2) TiO2nanoparticles on the surface of the photocatalytic material were contributed to the stability of the catalysts in the material by creating a favorable condition.(3) when the photocatalytic reactor was aerated at 2.5 L·min^(-1) and illuminated for 9 h at pH 8, the TP removal rate of the system reached 65.00%, which was 17.73% higher than that of single vertical flow constructed wetland under the hydraulic load of 1.2 m^(3)·m^(-2)·d^(-1). This study provided a reference for the treatment and ecological restoration of low-polluted wastewater.
作者
郑淑君
王铁运
王妍
刘云根
马荣
ZHENG Shujun;WANG Tieyun;WANG Yan;LIU Yungen;MA Rong(College of Ecology and Environment,Southwest Forestry University,Kunming,Yunnan 650224,China;Yunnan Key Laboratory of Ecological Environment Evolution and Pollution Control in Mountainous Rural Areas,Kunming,Yunnan 650224,China;College of Machinery and Transport,Southwest Forestry University,Kunming,Yunnan 650224,China)
出处
《福建农林大学学报（自然科学版）》
CSCD
北大核心
2023年第2期265-271,共7页
Journal of Fujian Agriculture and Forestry University:Natural Science Edition
基金
云南省高原湿地保护修复与生态服务重点实验室开放基金项目(202105AG070002)
云南省科技计划面上项目(202001AU070108)。
关键词
低污染水
人工湿地
氮
磷
光催化
low-polluted water
constructed wetland
nitrogen
phosphorus
photocatalysis
