芦苇碳源-表面流人工湿地对农田退水脱氮的长期效能研究

常洋; 王彤; 王海燕; 储昭升; 杭前宇; 刘凯; 侯泽英

doi:10.3969/j.issn.1674-991X.2016.05.067

芦苇碳源-表面流人工湿地对农田退水脱氮的长期效能研究

doi: 10.3969/j.issn.1674-991X.2016.05.067

常洋^1,2,
王彤¹,
王海燕^2,3*, ,,
储昭升^2,4,
杭前宇^2,3,
刘凯^2,5,
侯泽英^2,4

1.
长安大学环境科学与工程学院
2.
环境基准与风险评估国家重点研究室,中国环境科学研究院
3.
中国环境科学研究院水污染控制技术研究中心
4.
中国环境科学研究院湖泊生态环境创新基地
5.
河南理工大学材料科学与工程学院

详细信息

通讯作者:
王海燕 E-mail: wanghy@craes.org.cn

中图分类号: X703.1
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出版历程
- 收稿日期: 2016-03-10
- 修回日期: 2016-04-20
- 刊出日期: 2016-09-20

The Long-term Nitrogen Removal Efficiency from Agricultural Runoff in Phragmites Australis Packed Surface Flow Constructed Wetland

Chang yang^1,2,
WANG Tong¹,
WANG Haiyan^{2,3*
, ,},
CHU Zhaosheng^2,4,
HANG Qianyu^2,3,
LIU Kai^2,5,
HOU Zeying^2,4

1.
School of Environmental Science and Engineering, Chang’an University
2.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences
3.
Research Center for Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences
4.
Research Center of Lake Eco-Environments, Chinese Research Academy of Environmental Sciences
5.
School of Materials Science and Engineering, Henan Polytechnic University

More Information

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

摘要

摘要: 针对农田退水NO₃^--N占比高、C/N低，氮污染难以去除的问题，将经济易得的芦苇(Phragmites australis)茎叶碎段装填在表面流人工湿地(packed surface flow construct wetland，PSFW)的表层作为外加碳源，以研究其长期运行情况下的脱氮效能。结果表明：第29~149天，外加芦苇茎叶碎段的PSFW的脱氮效能明显高于无芦苇茎叶碎段的空白PSFW₀；进水NO₃^--N和TN浓度分别为(16.4±1.0)和(17.7±2.0)mg/L，HRT按3、4和2 d运行时，HRT为4 d时脱氮效能最优，PSFW对NO₃^--N和TN去除率分别为(87.4±6.0)%和(74.1±6.0)%，PSFW₀去除率仅为(14.4±4.0)%和(14.4±3.0)%；第150~269天，PSFW的脱氮效能稍高于PSFW₀，在进水NO₃^--N和TN浓度分别为(10.4±1.0)和(10.8±1.0)mg/L，HRT按3、2和1 d运行时，HRT为3 d时脱氮效能最优，PSFW对NO₃^--N和TN的去除率分别为(91.9±7.0)%和(90.2±7.0)%，PSFW₀去除率分别为(91.3±5.0)%和(86.4±6.0)%。第270~334天，PSFW的脱氮效能稍低于PSFW₀；进水NO₃^--N和TN浓度分别为(5.7±0.4)和(7.2±0.8)mg/L，HRT为3 d时，PSFW对NO₃^--N和TN的去除率分别为(88.6±10.0)%和(82.5±7.0)%，PSFW₀去除率分别为(94.0±6.0)%和(87.8±3.0)%。
- 芦苇 /
- 植物碳源 /
- 表面流人工湿地 /
- 农田退水 /
- 脱氮
Abstract: The low C/N ratio and high nitrate proportion characteristics of agricultural runoff makes its nitrate removal difficult. To resolve such problem, the economically and easily obtained Phragmites australis stems and leaves were applied and packed in the surface layer of the surface flow constructed wetland (PSFW) as external carbon sources to study the long-term nitrogen removal from agricultural runoff. Compared with control PSFW₀, obviously higher nitrate removal efficiency was observed in Phragmites australis packed PSFW during 29-149 d operation. When the influent NO₃^--N and TN were (16.4±1.0) mg/L and (17.7±2.0) mg/L and the HRTs were 2 d, 3 d and 4 d, the highest nitrogen removal efficiency was achieved under 4 d HRT condition, and the NO₃^--N and TN removal efficiency in PSFW were (87.4±6.0)% and (74.1%±6.0)%. Those removal in PSFW₀ were (14.4±4.0)% and (14.4±3.0)% respectively. Slight higher denitrification efficiency was obtained in PSFW than that in PSFW₀ during 150-269 d operation. When the influent NO₃^--N and TN were (10.4±1.0) mg/L and (10.8±1.0) mg/L and the HRTs were 3 d, 2d and 1d, the highest nitrogen removal efficiency was achieved under 3d HRT condition, and the NO₃^--N and TN removal efficiency in PSFW were (91.9±7.0)% and (90.2±7.0)%. Those removal were (91.3±5.0)% and (86.4±6.0)% in PSFW₀ accordingly. Slight lower denitrification efficiency was obtained in PSFW than that in PSFW₀ during 270-334 d operation. When the influent NO₃^--N and TN were (5.7±0.4) mg/L and (7.2±0.8) mg/L and the HRT was 3 d, the NO₃^--N and TN removal efficiency in PSFW were (88.6±10.0)% and (82.5±7.0)%. Those removal were (94.0±6.0)%和(87.8±3.0)% in PSFW₀ accordingly.
- tPhragmites australis /
- plant carbon source /
- surface flow constructed wetland /
- agricultural runoff /
- nitrogen removal