Effects of dissolved oxygen and influent COD/N ratios on nitrogen removal in horizontal subsurface flow constructed wetland

被引：127

作者：

Ding, Yi ^{[2
]}

Song, Xinshan ^{[2
]}

Wang, Yuhui ^{[2
]}

Yan, Denghua ^{[1
]}

机构：

[1] China Inst Water Resources & Hydropower Res, Beijing 100038, Peoples R China

[2] Donghua Univ, Coll Environm Sci Engn, Shanghai 201620, Peoples R China

来源：

ECOLOGICAL ENGINEERING | 2012年 / 46卷

基金：

中国国家自然科学基金; 上海市自然科学基金;

关键词：

Carbon extracting solution; COD/N ratio; Dissolved oxygen; Horizontal sub-surface flow constructed wetland; Nitrification-denitrification; Nitrogen removal; NITRATE REMOVAL; PERFORMANCE; RATES;

D O I：

10.1016/j.ecoleng.2012.06.002

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Horizontal subsurface flow constructed wetland (SSF CW) provides good conditions to denitrification but the ability of this system to nitrify NH4+-N is limited. The performance response of SSF CW to simulated wastewater with different COD/N (chemical oxygen demand: TN in influent) ratios was studied during an 8-month period in greenhouse conditions to improve the removal of NH4+-N. In this study, several wetland litters were hydrolyzed to get relevant carbon extracting solution, which was applied to the wetland systems. During the nitrification process, the variation of dissolved oxygen (DO) with COD/N ratios had a significant effect on the removal of NH4+-N. It was found that the total nitrogen (TN) removal efficiency increased with COD/N ratios. Appropriate control of the carbon or nitrogen source concentration and the COD/N ratio in the influent could achieve the optimal nitrogen removal. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：107 / 111

页数：5

共 19 条

[1] Long term performance of a constructed wetland for landfill leachate treatment [J].

Bulc, Tjasa G. .

ECOLOGICAL ENGINEERING, 2006, 26 (04) :365-374

[2] Performance of experimental horizontal subsurface flow constructed wetlands fed with dissolved or particulate organic matter [J].

Caselles-Osorio, Aracelly ;

Garcia, Joan .

WATER RESEARCH, 2006, 40 (19) :3603-3611

[3] Nitrate removal and DO levels in batch wetland mesocosms:: Cattail (Typha spp.) versus bulrush (Scirpus spp.) [J].

Gebremariam, Seyoum Yami ;

Beutel, Marc W. .

ECOLOGICAL ENGINEERING, 2008, 34 (01) :1-6

[4] Denitrification potential and carbon quality of four aquatic plants in wetland microcosms [J].

Hume, NP ;

Fleming, MS ;

Horne, AJ .

SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 2002, 66 (05) :1706-1712

[5] Plant carbohydrate limitation on nitrate reduction in wetland microcosms [J].

Hume, NP ;

Fleming, MS ;

Horne, AJ .

WATER RESEARCH, 2002, 36 (03) :577-584

[6] Nitrate removal in wetland microcosms [J].

Ingersoll, TL ;

Baker, LA .

WATER RESEARCH, 1998, 32 (03) :677-684

[7]

Kadlec R. H., 1996, Treatment Wetlands

[8] The role of plant uptake on the removal of organic matter and nutrients in subsurface flow constructed wetlands: a simulation study [J].

Langergraber, G .

WATER SCIENCE AND TECHNOLOGY, 2005, 51 (09) :213-223

[9] Effects of macrophytes and external carbon sources on nitrate removal from groundwater in constructed wetlands [J].

Lin, YF ;

Jing, SR ;

Wang, TW ;

Lee, DY .

ENVIRONMENTAL POLLUTION, 2002, 119 (03) :413-420

[10] Features of promising technologies for pretreatment of lignocellulosic biomass [J].

Mosier, N ;

Wyman, C ;

Dale, B ;

Elander, R ;

Lee, YY ;

Holtzapple, M ;

Ladisch, M .

BIORESOURCE TECHNOLOGY, 2005, 96 (06) :673-686

← 1 2 →