拼装湿地循环处理对城市水体水质改善的效果  

Effect of recycling treatment of assembled wetland on water quality improvement of urban water body

作　　者：朱成 姚创宏 许元敏 王哲 吴昊远 李久义[4] ZHU Cheng;YAO Chuanghong;XU Yuanmin;WANG Zhe;WU Haoyuan;LI Jiuyi(Tianhe Environmental Technology Co.,Ltd.;Water Affairs Bureau of Gulou District of Nanjing City;Inner Mongolia Road and Bridge Group Co.,Ltd.;School of Environment,Beijing Jiaotong University)

机构地区：[1]南京天河水环境科技有限公司 [2]南京市鼓楼区水务局 [3]内蒙古路桥集团有限责任公司 [4]北京交通大学环境学院

出　　处：《环境工程技术学报》2025年第1期168-175,共8页Journal of Environmental Engineering Technology

基　　金：国家自然科学基金面上项目(51978037)。

摘　　要：近年来,降雨径流造成城市水体有机物和氨氮浓度超标的微污染问题较为突出,影响城市人居与生态环境,亟需开发绿色高效的原位处理技术以满足微污染城市水体水质改善需求。选取城市雨水提升泵站前池为处理水体,在水体内原位设置由动力模块和高效模块组成的循环拼装湿地,通过泵站前池水体循环处理方式,去除水体污染物和提升水体自净能力;通过对拼装湿地不同模块运行水质参数〔化学需氧量(COD)、氨氮、浊度〕的连续监测及水体不同区域耗氧速率和氨氮消除速率测定,探究拼装湿地循环处理对城市微污染水体水质改善的影响。结果表明:1)拼装湿地能够稳定去除约85%的COD和87%的氨氮,水体COD和氨氮浓度分别稳定在2~3和0.2~0.3 mg/L;2)拼装湿地循环处理作用下,泵站前池水体的耗氧速率提升3~10倍,氨氮去除速率提升2~3倍;3)拼装湿地填料表面形成了具有高效脱氮除碳功能的微生物种群,保证了拼装湿地良好的污染物去除性能。拼装湿地循环处理方式不仅借助设备本身的过滤、植物吸收和微生物降解等过程去除污染物,还通过强化气液传质、提升溶解氧水平和提高生化反应速率等方式提升了所处理水体的自净能力。拼装湿地循环处理技术在净化城市河湖水体、改善水体微生态等方面具有推广应用的潜力。In recent years,the micro-pollution problem of excessive organic matter and ammonia nitrogen concentration in urban water caused by rainfall runoff has become more prominent,affecting urban human settlements and ecological environment.It is urgent to develop green and efficient in-situ treatment technology to meet the needs of micro-pollution urban water quality improvement.The front pond of the urban rainwater lifting pump station was selected as the water body for treatment,and a cyclic assembled wetland composed of power module and efficient module was set in situ in the water body.Through the water body circulation treatment of the front pond of the pumping station,the efficient removal of pollutants and the improvement of water body selfpurification capacity were realized.Through the continuous monitoring of water quality parameters(COD,ammonia nitrogen,turbidity)of different modules of assembled wetland and the determination of oxygen consumption rate and ammonia nitrogen elimination rate in different areas of the water body,the influence of recycling treatment of assembled wetland on the water quality improvement of urban micro-polluted water bodies was explored.The results showed that:(1)During the stable operation phase,the removal efficiency of COD and ammonia nitrogen was 85%and 87%,and the effluent of COD and ammonia nitrogen was 2-3 mg/L and 0.2-0.3 mg/L,respectively.(2)Under the cyclic treatment of the assembled wetland,the oxygen consumption and ammonia nitrogen removal rates of the water body of the front pond were increased 3-10 times and 2-3 times,respectively.(3)A microbial community with efficient denitrification and carbon removal capabilities was established on the surface of the wetland's fill material,ensuring the pollutant removal performance of the wetland.The recycling assembly wetland treatment not only utilized the filtration,plant uptake,and microbial degradation processes inherent to remove pollutants,but also improved the self-purification capacity of the treated water body by stre

关 键 词：拼装湿地 泵站前池 氨氮 有机物 耗氧速率 微污染 城市水体 

分 类 号：X703[环境科学与工程—环境工程]