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生物滞留系统去除氮的影响因素研究
引用本文:仇付国,王珂,李林彬,王娟丽.生物滞留系统去除氮的影响因素研究[J].科学技术与工程,2018,18(4).
作者姓名:仇付国  王珂  李林彬  王娟丽
作者单位:北京建筑大学城市雨水系统与水环境教育部重点实验室,北京建筑大学城市雨水系统与水环境教育部重点实验室,北京建筑大学城市雨水系统与水环境教育部重点实验室,北京建筑大学城市雨水系统与水环境教育部重点实验室
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目),住房和城乡建设部科学技术项目,北京建筑大学科学研究基金
摘    要:传统雨水生物滞留系统对氮的去除很不稳定,为了提高硝氮和总氮的去除效果,尝试在生物滞留系统底部增加内部淹没区,提供所需的缺氧环境并延长系统内雨水的停留时间,改善系统的除氮能力。对有淹没区运行条件下进水有机物浓度和滞留时间除氮的影响进行了试验。结果表明系统在有淹没区和无淹没区运行条件下,对NH4+-N的平均去除率均在90%以上。无淹没区时系统对NO3--N的去除率为21%。有淹没区时(滞留时间2 h)系统对NO3--N和TN的去除作用显著提高到74%和78%。淹没运行时进水中COD浓度可以显著影响NO3--N的去除效果,当COD浓度为0-100 mg/L,NO3--N(7-9 mg/L)去除率随COD浓度的增加而显著升高。滞留时间对NO3--N去除效果的影响较为明显,滞留时间从1 h增加到8 h,系统的NO3--N平均去除率从21%增加到93%。

关 键 词:海绵城市  生物滞留系统    COD
收稿时间:2017/6/29 0:00:00
修稿时间:2017/8/28 0:00:00

Study on the factors affecting the removal efficiency of Nitrogen in bioretention
qiu fu guo,and.Study on the factors affecting the removal efficiency of Nitrogen in bioretention[J].Science Technology and Engineering,2018,18(4).
Authors:qiu fu guo  and
Affiliation:Beijing University of Civil Engineering and Architecture,,,
Abstract:The traditional bioretention system is very unstable to remove nitrogen from rainwater. Aiming at increase the removal efficiency of nitrogen, the internal submerged zone (ISZ) at the bottom of the bioretention was established to provide the anoxic environment and to prolong the retention time of rainwater in the system. The effect of COD concentration and retention time on nitrogen removal was investigated. The results showed that the average removal rate of NH4+-N was above 90% at conditions with and without ISZ. The removal rate of NO3--N was 21% by bioretention without ISZ, whereas the removal of NO3--N and TN significantly increased to 74% and 78% by bioretention with ISZ at the retention time of 2 h. At COD 0-100 mg/L, the removal rate of NO3--N (7-9 mg/L) increased significantly with the increase of COD level in the influent. The effect of retention time on NO3--N removal was marked, the average removal rate of NO3--N increased from 21% to 93% when the retention time increased from 1 h to 8 h.
Keywords:sponge  city  bioretention  nitrogen  COD
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