[1]仇付国,夏鑫,刘玉君,等.活性炭改良生物滞留系统基质强化氮的去除[J].中国给水排水,2023,39(17):124-130.
　QIUFu-guo,XIAXin,LIUYu-jun,et al.Activated Carbon for Modification of Bioretention System Substrate to Enhance Nitrogen Removal[J].China Water & Wastewater,2023,39(17):124-130.
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活性炭改良生物滞留系统基质强化氮的去除

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第39卷 期数: 2023年第17期 页码: 124-130 栏目: 出版日期: 2023-09-01
Title:
Activated Carbon for Modification of Bioretention System Substrate to Enhance Nitrogen Removal
作者:
仇付国， 夏鑫， 刘玉君， 付昆明
（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 100044）
Author(s):
QIU　Fu-guo， XIA　Xin， LIU　Yu-jun， FU　Kun-ming
（Key Laboratory of Urban Stormwater System and Water Environment ， Beijing University of Civil Engineering and Architecture， Beijing 100044， China）
关键词:
生物滞留系统;  改性活性炭;  强化除氮;  内部淹没饱和区;  前期干燥时间
Keywords:
bioretention system;  modified activated carbon;  enhanced nitrogen removal;  internal submerged saturation zone;  antecedent drying time
摘要:
为解决传统雨水生物滞留系统出水氮淋失的难题，采用活性炭对系统填料进行改良，强化生物滞留系统对氮的去除效果。首先分别采用ZnCl2溶液和给水厂污泥盐酸浸出液对颗粒活性炭进行改性，以提高活性炭对NO3--N的吸附效果；然后将质量比为20%的改性活性炭和12%的给水厂污泥掺入滞留系统砂土基质中，考察基质改良后系统对氮、磷的去除效果。通过滞留柱模拟试验评估改良系统在无淹没饱和区及较长前期干燥时间下对氮、磷的去除效果，结果表明，改良生物滞留系统在无淹没饱和区时对NO3--N、TN和TP的去除率分别可达到90.98%、72.65%和95.85%；在较长前期干燥时间下，改良生物滞留系统能有效减少氮淋失，对TN的去除率可达到44.28%，而对TP的去除率均在97%以上。
Abstract:
This paper used activated carbon to modify the packing media of bioretention system and enhance its nitrogen removal performance to solve the problem of nitrogen leaching from the traditional rainwater bioretention system. Firstly, ZnCl2 solution and hydrochloric acid leaching solution of sludge from water treatment plant were employed to modify granular activated carbon to improve its nitrate nitrogen adsorption capacity. Then, the modified activated carbon (20% by weight) and sludge from water treatment plant (12% by weight) were mixed into the sand media of the bioretention system to investigate the removal performance of nitrogen and phosphorus. The performance of the modified system for nitrogen and phosphorus removal were evaluated by the retention column experiment under the condition of no internal submerged saturation zone and long antecedent drying time. When there was no internal submerged saturation zone in the modified system, the removal rates of NO3--N, TN and TP reached 90.98%, 72.65% and 95.85%, respectively. Under the long antecedent drying time, the modified bioretention system effectively reduced nitrogen leaching, the removal rate of TN reached 44.28%, and the removal rate of TP was above 97%.

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更新日期/Last Update: 2023-09-01