多氧态垂直流人工湿地系统的构建及其污染物去除特性  

Construction of vertical flow constructed wetland system with multi-aerobicand anerobic zones and its removal characteristics on pollutant

作　　者：申志强 徐嫚嫚 王欣 张琴[1] 白少元[1,3] SHEN Zhiqiang;XU Manman;WANG Xin;ZHANG Qin;BAI Shaoyuan(Guilin University of Technology,Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology,Guilin 541000,China;Xinxiang Water Treatment,Energy Saving and Emission Reduction Engineering Technology Research Center,School of Materials Science and Engineering,Henan Polytechnic University,Xinxiang 453003,China;Guilin University of Technology,Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety Guarantee in Karst Region,Guilin 541000,China)

机构地区：[1]桂林理工大学,广西环境污染控制理论与技术重点实验室,桂林541000 [2]河南工学院材料科学与工程学院,新乡市水处理节能减排工程技术研究中心,新乡453003 [3]桂林理工大学,广西岩溶地区水污染控制与用水安全保障协同创新中心,桂林541000

出　　处：《环境工程学报》2024年第4期1151-1160,共10页Chinese Journal of Environmental Engineering

基　　金：广西重点研发“聚居型漓江洲岛生态环境负碳修复关键技术研究与示范”(桂科AB22080067);国家自然科学基金(52260024)

摘　　要：针对传统垂直流人工湿地因缺少厌氧及缺氧环境,反硝化能力较弱的问题,本研究对传统垂直流人工湿地系统进行了结构改造,构建为分内、外两层的多氧态垂直流人工湿地,在不降低其原有硝化能力的同时,通过增加系统的厌氧及缺氧体积,提升其反硝化能力。对该湿地系统在不同水饱和比、不同HRT条件下的污染物去除效率、基质中微生物群落结构演变规律以及氮循环功能基因的分布特征等进行的研究表明:当外层水饱和比为1:2,HRT为24 h时,多氧态垂直流湿地系统对NH_(4)^(+)-N和COD的净化效果最好;系统氮循环功能微生物的数量在外层中的分布高于内层,且对系统的硝化和反硝化功能均有促进作用,可提升系统总的氮去除效率。以上研究结果可以为多氧态垂直流人工湿地系统的推广和应用提供参考。Aiming at the problem that the traditional vertical flow constructed wetland has weak nitrogen removal ability due to the lack of anaerobic and anoxic environment,in this study,the structure of the traditional vertical flow constructed wetland system was reconstructed,and a vertical flow constructed wetland system with inner and outer double-layer construction and multi-aerobic and anerobic zones was built.The denitrification ability of this wetland system was strengthened by increasing its anaerobic and anoxic volume,and its original nitrification capacity did not change.At different water saturation ratio and hydraulic residence time,the pollutant removal efficiency,matrix microbial community structure and the distribution characteristics of nitrogen cycling functional genes in the matrix of wetland system the evolution were studied.The results showed that the best removal rates of NH_(4)^(+)-N and COD occurred when the water saturation ratio of the outer layer was 1:2 and the hydraulic residence time was 24 h;the abundance of nitrogen cycling functional microorganisms in the outer layer of the system was higher than that in the inner layer,which could promote both nitrification and denitrification functions of the system and raise the nitrogen removal rate of the system.The results of this study can provide a reference and basis for the popularization and application of vertical flow constructed wetland system with multi-aerobic and anerobic zones.

关 键 词：多氧态垂直流人工湿地 水饱和比 去除效率 功能菌 功能基因 

分 类 号：X703[环境科学与工程—环境工程]