NEIGAE OpenIR  > 湿地与全球变化学科组
An innovative wood-chip-framework substrate used as slow-release carbon source to treat high-strength nitrogen wastewater
H. Li, Z. F. Chi, B. X. Yan, L. Cheng and J. Z. Li; Li H(李怀)
2017
发表期刊Journal of Environmental Sciences
卷号51页码:275-283
摘要Removal of nitrogen in wastewater before discharge into receiving water courses is an important consideration in treatment systems. However, nitrogen removal efficiency is usually limited due to the low carbon/nitrogen (C/N) ratio. A common solution is to add external carbon sources, but amount of liquid is difficult to determine. Therefore, a combined wood-chip-framework substrate (with wood, slag and gravel) as a slow-release carbon source was constructed in baffled subsurface-flow constructed wetlands to overcome the problem. Results show that the removal rate of ammonia nitrogen (NH4+-N), total nitrogen (TN) and chemical oxygen demand (COD) could reach 37.5%-85%, 57.4%-86%, 32.4%-78%, respectively, indicating the combined substrate could diffuse sufficient oxygen for the nitrification process (slag and gravel zone) and provide carbon source for denitrification process (wood-chip zone). The nitrification and denitrification were determined according to the location of slag/gravel and wood-chip, respectively. Nitrogen removal was efficient at the steady phase before a shock loading using slag-wood-gravel combined substrate because of nitrification-denitrification process, while nitrogen removal was efficient under a shock loading with wood-slag-gravel combined substrate because of ANAMMOX process. This study provides a newidea for wetland treatment of high-strength nitrogen wastewater. (C) 2016 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
DOI10.1016/j.jes.2016.07.008
引用统计
文献类型期刊论文
条目标识符http://ir.iga.ac.cn/handle/131322/7575
专题湿地与全球变化学科组
通讯作者Li H(李怀)
推荐引用方式
GB/T 7714
H. Li, Z. F. Chi, B. X. Yan, L. Cheng and J. Z. Li,Li H. An innovative wood-chip-framework substrate used as slow-release carbon source to treat high-strength nitrogen wastewater[J]. Journal of Environmental Sciences,2017,51:275-283.
APA H. Li, Z. F. Chi, B. X. Yan, L. Cheng and J. Z. Li,&李怀.(2017).An innovative wood-chip-framework substrate used as slow-release carbon source to treat high-strength nitrogen wastewater.Journal of Environmental Sciences,51,275-283.
MLA H. Li, Z. F. Chi, B. X. Yan, L. Cheng and J. Z. Li,et al."An innovative wood-chip-framework substrate used as slow-release carbon source to treat high-strength nitrogen wastewater".Journal of Environmental Sciences 51(2017):275-283.
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