Nitrogen processing gradients in subsurface-flow treatment wetlands—influence of wastewater characteristics

Tanner, Chris C.; Kadlec, Robert H.; Gibbs, Max M.; Sukias, J.P.S.; Nguyen, M. L.

doi:10.1016/s0925-8574(02)00011-3

Cited by 167 publications

(63 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Compared to conventional wastewater treatment technologies, CWs have economical and eco-friendly advantages due to their low-cost, easy operation and low maintenance (Puigagut et al, 2008;Faulwetter et al, 2009). Constructed wetland systems have already been used in the treatment of a wide range of wastewaters originated from domestic (Bahgat et al, 1999;Decamp and Warren, 2001;Keffala and Ghrabi, 2005;Nurk et al, 2005;Reyes-Contreras et al, 2012;Adrados et al, 2014;Younger and Henderson, 2014), industrial (Calheiros et al, 2007;Tao et al, 2007;Younger and Henderson, 2014), and agricultural sources (Nguyen, 2000;Tanner et al, 2002;Yeh et al, 2009;Liu et al, 2013a), as well as landfill leachate (Kozub and Liehr, 1999;Sundberg et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Removal of antibiotics and antibiotic resistance genes from domestic sewage by constructed wetlands: Optimization of wetland substrates and hydraulic loading

Chen

Wei

Liu

et al. 2016

Science of The Total Environment

233

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Removal of antibiotics and antibiotic resistance genes from domestic sewage by constructed wetlands: Optimization of wetland substrates and hydraulic loading

Chen

Wei

Liu

et al. 2016

Science of The Total Environment

233

View full text Add to dashboard Cite

“…These forms of N are of course subject to transformations between different organic and inorganic forms via microbial processes (nitrification, denitrification, anammox and DNRA), assimilation by plants and microbes, adsorption to particulate phases (particularly NH 4 -N), and settling and storage of particulate TON in the wetland. We did not have sufficient data about relative changes in N species or balance between different processes to be able to usefully infer sequential processing rates (e.g., [39]) in these large and highly dynamic systems.…”

Section: Discussionmentioning

confidence: 99%

Effectiveness of a Natural Headwater Wetland for Reducing Agricultural Nitrogen Loads

Uuemaa

Palliser

Hughes

et al. 2018

Water

View full text Add to dashboard Cite

Natural wetlands can play a key role in controlling non-point source pollution, but quantifying their capacity to reduce contaminant loads is often challenging due to diffuse and variable inflows. The nitrogen removal performance of a small natural headwater wetland in a pastoral agricultural catchment in Waikato, New Zealand was assessed over a two-year period (2011)(2012)(2013). Flow and water quality samples were collected at the wetland upper and lower locations, and piezometers sampled inside and outside the wetland. A simple dynamic model operating on an hourly time step was used to assess wetland removal performance for key N species. Hourly measurements of inflow, outflow, rainfall and Penman-Monteith evapotranspiration estimates were used to calculate dynamic water balance for the wetland. A dynamic N mass balance was calculated for each N component by coupling influent concentrations to the dynamic water balance and applying a first order areal removal coefficient (k 20 ) adjusted to the ambient temperature. Flow and water quality monitoring showed that wetland was mainly groundwater fed. The concentrations of oxidised nitrogen (NO x -N, Total Organic Nitrogen (TON) and Total-N (TN) were lower at the outlet of the wetland regardless of flow conditions or seasonality, even during winter storms. The model estimation showed that the wetland could reduce net NO x -N, NH 4 -N, TON and TN loads by 76%, 73%, 26% and 57%, respectively.

show abstract

“…High NH 4 -N concentrations were observed in the experimental river with concentrations >20 mg L −1 at CR. Ammonium oxidation requires oxygen, which contributes to low dissolved oxygen levels in water and sediments (Tanner et al 2002). The depletion of oxygen by NH 4 oxidation in sediments at the river boundary provides a favorable anoxic environment conducive to methanogenic Archaea activity (Chen et al 2010a, b).…”

Section: Spatial Variation Of Ch 4 and N 2 O Emissionsmentioning

confidence: 99%

Spatial and temporal variability in nitrous oxide and methane emissions in urban riparian zones of the Pearl River Delta

Zhang

Huang

Yang

et al. 2015

Environ Sci Pollut Res

View full text Add to dashboard Cite

Spatial and temporal variability in nitrous oxide and methane emissions were quantified in three seasons using closed chambers in three riparian zone locations of three branches of the Pearl River, Guangzhou, China. The sampling sites were selected in a rapidly developing urban area of Guangzhou and represented a pollution gradient. The results show that urban riparian landscapes can be large source areas for CH 4 and N 2 O, with fluxes of −0.035 ∼ 32.30 mg m −2 h −1 and −5.49 ∼ 37.31 μg m −2 h −1 , respectively. River water quality, sediment texture, and NH 4 -N and NO 3 -N concentrations correlated with N 2 O and CH 4 emission rates. The riparian zones of the more seriously polluted tributaries showed higher greenhouse gas fluxes than that of the less polluted main stem of the Pearl River. Rain events increased emissions of CH 4 by 6.5∼21.3 times and N 2 O by 2.2∼5.7 times. The lower concentrations of heavy metals increased the activity of denitrifying enzymes while inhibited the methane producing pathways. This work demonstrates that rapidly developing urban areas are an important source of greenhouse gas emissions, which is conditioned by various environmental factors.

show abstract

Nitrogen processing gradients in subsurface-flow treatment wetlands—influence of wastewater characteristics

Cited by 167 publications

References 29 publications

Removal of antibiotics and antibiotic resistance genes from domestic sewage by constructed wetlands: Optimization of wetland substrates and hydraulic loading

Removal of antibiotics and antibiotic resistance genes from domestic sewage by constructed wetlands: Optimization of wetland substrates and hydraulic loading

Effectiveness of a Natural Headwater Wetland for Reducing Agricultural Nitrogen Loads

Spatial and temporal variability in nitrous oxide and methane emissions in urban riparian zones of the Pearl River Delta

Contact Info

Product

Resources

About