磁场/光催化强化人工湿地净化生活污水的试验研究  

Experimental Study on Purification of Domestic Sewage by Magnetic Field/Photocatalytic Enhanced Constructed Wetlands

作　　者：熊烈钞 马荣[1,2] 刘云根 伏川东 卢秀秀 彭丽萍 XIONG Lie-chao;MA Rong;LIU Yun-gen;FU Chuan-dong;LU Xiu-xiu;PENG Li-ping(School of Mechanical Engineering and Transportation,Southwest Forestry University,Kunming 650224,China;Key Laboratory of Ecological Environment Evolution and Pollution Control in Mountainous and Rural Areas of Yunnan Province,Kunming 650224,China)

机构地区：[1]西南林业大学机械与交通学院,昆明650224 [2]云南省山地农村生态环境演变与污染治理重点实验室,昆明650224

出　　处：《科学技术与工程》2024年第3期1301-1311,共11页Science Technology and Engineering

基　　金：云南省科技厅科技计划项目青年项目(202001AU070108);云南省科技厅科技计划项目面上项目(202201AT070048,2019FB070)。

摘　　要：人工湿地已成为广泛运用的污水处理方式,但仍存在效率较低等缺陷,而以人工湿地耦合多种强化工艺已成为近年来的研究热点。分别构建了磁场强化和光催化强化的人工湿地,针对不同进水浓度和水力停留时间(hydraulic retention time,HRT)(24、48、72 h),探究在磁场和光催化强化作用下的人工湿地对污水中TP、PO_(4)^(3-)-P、NH_(4)^(+)-N和COD_(Cr)的去除效果。研究结果表明,施加磁场后可促进人工湿地系统对NH_(4)^(+)-N和COD_(Cr)的去除,当HRT为24~72 h时,磁场强化的人工湿地对NH_(4)^(+)-N和COD_(Cr)的去除率分别能达到58.77%~96.91%、41.16%~85.42%。光催化作用由于大量自由基的生成,对污水中部分污染物降解效果明显,其对TP的去除率最大能达到59.85%,相比传统的人工湿地去除率提高了27.82%;去除NH_(4)^(+)-N和COD_(Cr)的最佳HRT为72 h,其去除率最高分别为67.57%和89.98%,相比传统的人工湿地分别提高了16.77%、21.64%。Constructed wetland has become a widely used sewage treatment method,but there are still defects such as low efficiency,and the coupling of constructed wetland with various strengthening processes has become a research hotspot in recent years.The constructed wetlands enhanced by magnetic field and photocatalysis were constructed respectively,and the removal effects of TP,PO_(4)^(3-)-P,NH_(4)^(+)-N and COD_(Cr) in wastewater by constructed wetlands under different influent concentrations and HRT(hydraulic retention time)(24 h,48 h,72 h)were investigated.The results show that the application of magnetic field can promote the removal of NH_(4)^(+)-N and COD_(Cr) by constructed wetland system.When HRT is 24~72 h,the removal rates of NH_(4)^(+)-N and COD_(Cr) by magnetic field enhanced constructed wetland can reach 58.77%~96.91%and 41.16%~85.42%,respectively.Photocatalysis has obvious degradation effect on some pollutants in sewage due to the formation of a large number of free radicals,and it s removal rate of TP could reach 59.85%,which is 27.82%higher than that of traditional constructed wetland.The optimal HRT for removing NH_(4)^(+)-N and COD_(Cr) was 72 h,and the highest removal rates were 67.57%and 89.98%,respectively,which were 16.77%and 21.64%higher than those of traditional constructed wetlands.

关 键 词：人工湿地 生活污水 光催化 磁场 

分 类 号：X703.1[环境科学与工程—环境工程]