植物碳源强化浮床净化效果及对根系微生物群落影响  

Purification Efficiency and Effect on Plant Roots Microbial Community of Enhanced Floating Bed with Plant Carbon Source

作　　者：韩雪宜 王怡[1] 王文怀 朱政 HAN Xue-yi;WANG Yi;WANG Wen-huai;ZHU Zheng(School of Environmental and Municipal Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;Key Laboratory of Northwest Water Resource,Environment and Ecology,Xi’an University of Architecture and Technology,Xi’an 710055,China)

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055 [2]西安建筑科技大学西北水资源与环境生态教育部重点实验室,陕西西安710055

出　　处：《中国给水排水》2023年第3期9-14,共6页China Water & Wastewater

基　　金：国家自然科学基金资助面上项目(52170172);陕西省重点产业创新链(群)项目(2021ZDLSF05-04);西安市科技局社会发展科技创新示范项目(20SFSF0011)。

摘　　要：为解决传统生态浮床对再生水补给景观水体中氮去除效果不佳的问题,在传统生态浮床(T-EFB)基础上引入植物碳源,构建植物碳源强化生态浮床(PCS-EFB),并通过中试考察了两者对再生水补给景观水体水质的净化效果,以及植物碳源对根系微生物菌群的影响。结果表明,PCS-EFB可大幅降低水体中污染物浓度,试验全程对浊度、TN、NO_(3)^(-)-N、藻密度和叶绿素a(Chl-a)的平均去除率分别可达46.52%、62.24%、92.84%、57.51%和63.86%。同时,植物碳源的缓释性与良好的可生化性使其在促进反硝化的同时不会引起水体COD的大幅增加。此外,植物碳源的添加还可提高浮床系统微生物多样性,同时增加Proteobacteria、Chloroflexi、Firmicutes等功能菌的相对丰度,促进水中污染物的去除和降解。因此,植物碳源强化生态浮床可用于以硝酸盐氮为主的景观水体净化,以保障水质和控制富营养化。To solve the problem that traditional ecological floating bed(T-EFB)is not effective in removing nitrogen from the landscape water supplied with reclaimed water,the plant carbon source(PCS)was introduced to an ecological floating bed to construct PCS-EFB.The purification effects on the landscape water supplied with reclaimed water and plant roots microbial community of T-EFB and PCS-EFB were compared.Results showed that PCS-EFB could greatly enhance the removal of pollutants in water.The average removal rates of turbidity,TN,NO_(3)^(-)-N,algae density and Chl-a concentration in PCS-EFB reached 46.52%,62.24%,92.84%,57.51%and 63.86%,respectively.Meanwhile,the sustained release and good biodegradability of PCS could promote the denitrification process without increasing COD in water largely.Moreover,the addition of PCS could improve the microbial diversity,increase the relative abundance of functional bacteria such as Proteobacteria,Chloroflexi and Firmicutes,and then promote the removal and degradation of pollutants in water.Thus,the PCS-EFB is suitable for the purification of the landscape water supplied with reclaimed water,and it is a promising technology for removing nitrate in water,which helps to ensure water quality and control eutrophication.

关 键 词：生态浮床 植物碳源 景观水体 硝酸盐 微生物群落 

分 类 号：TU992[建筑科学—市政工程]