寒冷地区多级垂直流人工湿地系统设计及氮磷去除效率
为了解决北方寒冷地区人工湿地冬季效率低、运行不稳定的问题,设计建设了两个多级垂直流人工湿地系统(multistage vertical-flow constructed wetlands,MVCWs),处理北京房山区居民生活污水,通过工程设计以及添加碳源强化系统脱氮效果,增加磷吸附基质等措施,提高系统稳定性和污染物的去除效率。研究结果表明,湿地系统Ⅰ化学需氧量(chemical oxygen demand,COD)的平均去除率为87.3%;总磷(total phosphorus,TP)的平均去除率为91.9%;总氮(total nitrogen,TN)的平均去除率为68.9%,能够全年稳定运行...
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Published in | 农业工程学报 Vol. 32; no. 23; pp. 218 - 225 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
中国农业大学资源与环境学院,北京,100193%北京通州京环环境服务有限公司,北京,101100
2016
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Subjects | |
Online Access | Get full text |
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Summary: | 为了解决北方寒冷地区人工湿地冬季效率低、运行不稳定的问题,设计建设了两个多级垂直流人工湿地系统(multistage vertical-flow constructed wetlands,MVCWs),处理北京房山区居民生活污水,通过工程设计以及添加碳源强化系统脱氮效果,增加磷吸附基质等措施,提高系统稳定性和污染物的去除效率。研究结果表明,湿地系统Ⅰ化学需氧量(chemical oxygen demand,COD)的平均去除率为87.3%;总磷(total phosphorus,TP)的平均去除率为91.9%;总氮(total nitrogen,TN)的平均去除率为68.9%,能够全年稳定运行。湿地系统Ⅱ采取半间歇式运行方式,在0.5 m3/(m2·d)的水力负荷条件下,对COD、TN、TP的平均去除率分别为92.5%、53.8%、77.2%。湿地系统Ⅱ厌氧单元添加62 kg木块后,COD/TN从0.93上升到1.85,比添加31 kg木块单元对TN的去除率提高15.6%。木块作为厌氧阶段的外加碳源,有效促进了垂直流人工湿地系统对氮的去除。通过垂直流人工湿地多级合理的单元设计,在厌氧阶段添加碳源有利于反硝化脱氮以及添加吸附磷的基质,提高冬季没有植物参与时高效除氮、磷,有效地保证对各种污染物的去除效率。使该研究中的人工湿地系统能够全年稳定运行,该研究结果可为人工湿地在中国北方的推广应用提供参考。 |
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Bibliography: | Wang Yong1, Zhang Baoli1, Tang Can2, Lu Jing1, Liu Hao1, Wu Wenliang1, Chen Qing1 (1. College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China; 2. Beijing Tongzhou District Environmental Services co., LTD, Beijing 101100, China) 11-2047/S wetlands; wastewater; nitrogen; phosphorus; vertical-flow constructed wetland; external carbon source; denitrification; cold area In order to solve the problems of low efficiency and unstable operation of constructed wetland in winter, 2 multistage vertical-flow constructed wetlands(MVCWs) systems were designed and constructed for treating the sewage of the residents in Fangshan District, Beijing City. Through the engineering design, adding extra carbon(C) source for denitrification effect, and increasing phosphorus(P) adsorption matrix, the system stability and the removal efficiency of pollutants were improved. MVCWs I was designed for the hydraulic loading of 70 m3/d at Houshiyang Village sewage treatment station in Fangshan Distr |
ISSN: | 1002-6819 |
DOI: | 10.11975/j.issn.1002-6819.2016.23.030 |