期刊
ECOLOGICAL ENGINEERING
卷 60, 期 -, 页码 271-275出版社
ELSEVIER
DOI: 10.1016/j.ecoleng.2013.07.024
关键词
Constructed wetland; Influent mode; Nitrogen removal; Hydraulic efficiency; Carbon source distribution
资金
- National Natural Science Foundation of China [51079028]
- National Natural Science Fund for Creative Research Groups [51021006]
- Water Pollution Control Project [2012ZX07205-005]
Influent mode in constructed wetlands can cause changes of hydraulic efficiency and carbon source distribution. In this study, impacts of four influent modes on nitrogen removal were studied by hydraulic tracer test and nutrient distribution analysis. NH4+-N, TN and COD were sampled along the reactors in different layers. Results showed that diffusive inflow contributed highest NH4+-N and TN removal reaching 64.3% and 60.9%, respectively. It proved that diffusive inflow achieved higher effective volume ratio and hydraulic efficiency. Moreover, nutrient distribution analysis implied that diffusive inflow enhanced reaeration causing efficient NH4+-N reduction. Compared with other modes, diffusive inflow has also resulted in well- distributed carbon source for denitrification in bottom layer. In addition, ANOVA test analyzed the significance among influent modes indicating that diffusive inflow had obvious effects on enhancing nitrogen removal. The study documented the feasibility of using diffusive inflow to enhance the treatment by improving hydraulic conditions and carbon source distribution in CWs. (C) 2013 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
Article
Ecology
Development and testing of a mechanistic model for wetland treatment of neutral and polar organic contaminants in oil sands process-affected water
Alexander M. Cancelli, Frank A. P. C. Gobas
Summary: A mechanistic model was developed to assess the removal efficiency of pollutants in a wetland system, particularly in oil sands process-affected water (OSPW). The model simulated wetland mechanisms of chemical removal and showed that sustained wetland treatment is feasible. It is a helpful tool to evaluate the feasibility of treatment systems and to assess trade-offs in wetland design and operation.
ECOLOGICAL ENGINEERING (2024)
Article
Ecology
Analyzing vegetation recovery and erosion status after a large Landslide at Mt. Hakusan, Central Japan
Prakash Singh Thapa, Hiromu Daimaru, Seiji Yanai
Summary: This study assessed the vegetation recovery and erosion condition in a landslide area in central Japan. The results show that the upper slope, where reforestation activities were implemented, has seen significant vegetation recovery and no significant erosion, while the lower slope lacks vegetation and has experienced continued erosion.
ECOLOGICAL ENGINEERING (2024)
Article
Ecology
The role of calcium and alkalinity on phosphorus removal by submerged aquatic vegetation in hardwater wetlands
Mike Jerauld, Forrest Dierberg, Thomas DeBusk, Scott Jackson, Kevin Grace, John Juston
Summary: The Everglades Stormwater Treatment Areas (STAs) are constructed wetlands built to remove phosphorus (P) from agricultural and urban runoff in support of Everglades restoration. Research shows that the levels of calcium (Ca) and alkalinity (Alk) have an impact on phosphorus removal in these wetlands.
ECOLOGICAL ENGINEERING (2024)
Article
Ecology
Effects of increasing complexity in biogeochemistry and hydrology on variability of total phosphorus concentration in models of a low flow subtropical wetland
Kalindhi Larios, Stefan Gerber, Rafael Munoz-Carpena, Patrick Inglett, K. Ramesh Reddy, Michael Chimney
Summary: This study modeled the phosphorus biogeochemical dynamics in one of the best performing Everglades treatment wetlands and found that the complexity of the hydrological system significantly affected the simulated water column P concentration. The modeling tool developed in this study can guide future data collection and optimization efforts for treatment wetlands in the Everglades.
ECOLOGICAL ENGINEERING (2024)
Article
Ecology
An analysis of long-term Everglades Stormwater Treatment Areas performance using structural equation models
Jing Hu, Benjamin Baiser, R. Thomas James, K. Ramesh Reddy
Summary: This study examined the long-term phosphorus retention in Stormwater Treatment Areas (STAs) and identified the factors influencing their performance. The results showed that the operational performance of STAs improved over time. There were notable differences among individual STAs, with the co-precipitation of phosphorus with calcium playing a critical role in one of the STAs. This highlights the complexity of phosphorus removal in STAs and the need for site-specific management strategies.
ECOLOGICAL ENGINEERING (2024)
Article
Ecology
Biogeochemical response of subtropical treatment wetlands to different flow conditions
Odi Villapando, K. R. Reddy, J. King
Summary: The biogeochemical response to different flow conditions within two parallel flow-ways in Everglades Stormwater Treatment Area (STA)-2 was studied. It was found that there was a gradual decrease in the total phosphorus (TP) concentration from inflow to outflow for both emergent aquatic vegetation (EAV) and submerged aquatic vegetation (SAV) dominated systems, with EAV showing a higher reduction rate. Significant increase in TP concentration was observed in the SAV system under no flow condition, possibly due to the production of particulate phosphorus (PP) through various mechanisms.
ECOLOGICAL ENGINEERING (2024)
分享论文
