芦苇碳源投加量对表面流人工湿地中试系统强化脱氮启动的影响

张恒亮; 朱铁群; 王海燕; 储昭升; 杭前宇; 侯泽英

doi:10.3969/j.issn.1674-991X.2017.03.047

芦苇碳源投加量对表面流人工湿地中试系统强化脱氮启动的影响

doi: 10.3969/j.issn.1674-991X.2017.03.047

张恒亮^1,2,3,
朱铁群¹,
王海燕^2,3,*, ,,
储昭升^2,4,
杭前宇^2,3,
侯泽英^2,4

^1. 华北水利水电大学环境与市政工程学院,河南郑州 450045
^2. 环境基准与风险评估国家重点实验室,中国环境科学研究院,北京 100012
^3. 中国环境科学研究院水污染控制技术研究中心,北京 100012
^4. 湖泊水污染治理与生态修复技术国家工程实验室,中国环境科学研究院,北京 100012

详细信息

作者简介:
张恒亮(1990—),男,硕士研究生, 1079092104@qq.com

通讯作者:
王海燕 E-mail: wanghy@craes.org.cn

中图分类号: X703
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出版历程
- 收稿日期: 2017-01-07
- 刊出日期: 2017-05-20

Influence of Phragmites australis carbon dosage on enhanced nitrogen removal start-up of pilot-scale surface flow constructed wetland

ZHANG Hengliang^1,2,3,
ZHU Tiequn¹,
WANG Haiyan^{2,3,*
, ,},
CHU Zhaosheng^2,4,
HANG Qianyu^2,3,
HOU Zeying^2,4

^1. School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
^2. State Key Laboratory of Environment Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
^3. Research Center for Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
^4. National Engineering Laboratory of Lake Water Pollution Control and Ecological Restoration Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China

More Information

Corresponding author: Haiyan WANG E-mail: wanghy@craes.org.cn

摘要

摘要: 针对农田退水C/N较低的问题,采取表面流人工湿地投加缓释型植物碳源芦苇强化反硝化脱氮。模拟农田退水水质为:N $O 3 -$ -N浓度,(8.00±1.00)mg/L;TN浓度,(9.00±1.00)mg/L;N $H 4 +$ -N浓度,(0.70±0.10)mg/L;N $O 2 -$ -N浓度,0.01 mg/L;TP浓度,(1.00±0.05)mg/L。设计了3组中试湿地:空白组湿地为不加芦苇碎段的对照湿地;1 ^#湿地为芦苇碎段面积占强化反硝化湿地段面积的1/4;2 ^#湿地为芦苇碎段面积占强化反硝化湿地段面积的1/2。采用静态方式进行为期40 d的启动试验。结果表明:启动前期(第1~18天),空白组湿地、1 ^#湿地和2 ^#湿地N $O 3 -$ -N的去除率分别达到84.2%(第18天)、89.1%(第18天)和97.8%(第7天);TN的去除率分别达到75.1%(第15天)、79.4%(第15天)和90.0%(第7天)。考虑到湿地N $O 3 -$ -N的利用情况,在试验第18天时补加N $O 3 -$ -N至浓度为(8.00±1.00)mg/L。启动后期(第19~40天),空白组湿地N $O 3 -$ -N和TN的去除率在第40天分别为78.0%和71.4%;1 ^#湿地在第37天分别为92.2%和75.2%;2 ^#湿地在第35天分别为95.8%和77.1%。投加芦苇碳源可大大缩短中试表面流人工湿地的启动期,2 ^#湿地启动较快,且对N $O 3 -$ -N和TN的去除效果明显高于1 ^#湿地和空白组湿地,表明碳源投加越多,启动越快,脱氮效果越好。
- 表面流人工湿地 /
- 中试 /
- 芦苇碳源 /
- 投加量 /
- 强化反硝化脱氮 /
- 启动期
Abstract: Slow-released plant carbon, Phragmites australis pieces, was added to the surface flow constructed wetland (SFW) to enhance the denitrification nitrogen removal of the low C/N ratio agricultural runoff. The characteristics of the simulated agricultural runoff were as follows: (8.00±1.00)mg/L N $O 3 -$ -N, (9.00±1.00)mg/L TN, (0.70±0.10)mg/L N $H 4 +$ -N, 0.01mg/L N $O 2 -$ -N and (1.00±0.05)mg/L TP. Three pilot-scale SFWs were designed for experiment as follows: the blank SFW without Phragmites australis pieces dosage, 1 ^# SFW with 1/4 areal proportion of Phragmites australis pieces to enhanced denitrification wetland and 2 ^# SFW with 1/2 areal proportion of Phragmites australis pieces to enhanced denitrification wetland. A 40-day start-up operation was carried out in static mode. The results showed that the N $O 3 -$ -N removal efficiency increased gradually to 84.2%, 89.1% and 97.8% on the 18 ^th, 18 ^th and 7 ^th day for the blank, 1 ^# and 2 ^# SFW respectively, while their TN removal efficiency gradually increased to 75.1%, 79.4% and 90.0% on the 15 ^th, 15 ^th and 7 ^th day in the early stage (1-18 d). The N $O 3 -$ -N was added to (8.00 ± 1.00) mg/L when it was almost completely consumed on the 18 ^th day. In the latter stage (19-40 d), the N $O 3 -$ -N removal gradually increased to 78.0%, 92.2% and 95.8% on the 40 ^th, 37 ^th and 35 ^th day for the blank, 1 ^# and 2 ^# SFW respectively, while their TN removal efficiency increased gradually to 71.4%, 75.2% and 77.1% accordingly. The start-up period of SFW could be greatly shortened by adding Phragmites australis pieces as carbon source, and 2 ^# SFW started with the higher speed. Moreover, the N $O 3 -$ -N and TN removal rates of 2 ^# SFW were also higher than those of 1 ^# and the blank SFWs. It was indicated that the higher-speed start-up and better nitrogen removal efficiency could be obtained for SFW with more Phragmites australis pieces carbon dosage.
- surface flow constructed wetland /
- pilot scale experiment /
- Phragmites australis carbon source /
- dosage /
- enhanced denitrification for nitrogen removal /
- start-up period

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