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不同尺度潜流人工湿地对污染河水的净化机制
Mechanism of different scales subsurface flow constructed wetlands for purifying polluted river water
投稿时间:2017-11-01  
DOI:10.12030/j.cjee.201711009
中文关键词:  尺度  净化机制  潜流人工湿地  污染河水
英文关键词:scale  purification mechanism  subsurface flow constructed wetland  polluted river water
基金项目:国家科技重大专项 (2014ZX07305-002-01);陕西省教育厅重点实验室科研计划项目(17JS078);中国博士后科学基金第61批面上项目 (2017M613290XB)
作者单位E-mail
沈莹 西安建筑科技大学环境与市政工程学院西安 710055 452004434@qq.com 
郑于聪 西安建筑科技大学环境与市政工程学院西安 710055  
王晓昌 西安建筑科技大学环境与市政工程学院西安 710055  
贾策 西安建筑科技大学环境与市政工程学院西安 710055  
赵梦云 西安建筑科技大学环境与市政工程学院西安 710055  
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中文摘要:
      为了揭示潜流人工湿地对污染河水的净化机制,通过构建实验室规模和中试规模2种尺度的人工湿地,系统分析了人工湿地净化污染河水过程中的基质特性、微生物特性和植物作用。结果表明,2种尺度人工湿地对悬浮固体(SS 95.86%,94.74%)和有机物(COD 85.29%,80.41%;BOD5 90.60%,89.99%)的去除效果相近,而实验室规模湿地对营养物的去除效果(TN 30.13%,TP 76.89%)优于中试规模湿地(TN 20.27%,TP 52.45%)。实验室规模人工湿地的微生物群落多样性和微生物数量更高,并且具有能够脱氮和降解有机物的特属优势菌种黄杆菌和金黄杆菌。中试规模人工湿地能够更好地为植物生长提供适宜的环境条件,中试规模湿地中的植物生物量(1.47 kg·m-2)高于实验室规模湿地(1.12 kg·m-2),而且植物在湿地氮磷去除中的贡献率(TN 23.55%,TP 8.80%)也高于实验室规模湿地(TN 11.03%,TP 4.46%)。
英文摘要:
      In order to investigate the mechanism of subsurface constructed wetland (SSF CW) for polluted river water purification, a lab scale and a pilot scale SSF CW were constructed to analyze the roles of substrates, microorganism and plants in CW. The results indicated that the two different scales CWs showed similar removal efficiencies for suspended solids (SS 95.86%, 94.74%) and organic matter (COD 85.29%, 80.41%; BOD5 90.60%, 89.99%). However, the lab scale wetland showed higher nutrient removal rates (TN 30.13%, TP 76.89%) than the pilot scale wetland (TN 20.27%, TP 52.45%). Furthermore, the diversity and the number of microbial communities in the lab scale wetland were both higher than those in the pilot scale. The Flavobacterium and Chryseobacterium were only found in the lab scale wetland which could degrade nitrogen and organic matter simultaneously. Finally, the pilot scale CW provided more favorable environment for plants growth than the lab scale. The plants played an important function especially in pilot scale CW for nitrogen and phosphorus removal (TN 23.55%, TP 8.80%), with TN 11.03%, TP 4.46% in lab scale CW.
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