Stormwater Treatment Evaluation of a Constructed Floating Wetland after Two Years Operation in an Urban Catchment

Walker, Chris; Tondera, Katharina; Lucke, Terry

doi:10.3390/su9101687

Cited by 41 publications

(22 citation statements)

References 13 publications

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“…For treatment of urban stormwater runoff, FWS CWs are mostly used. Walker et al [75], in their two-year field study, used a FWS design to treat stormwater runoff from an existing urban area in Queensland, Australia. However, there are some examples of the utilization of HSSF and VSSF designs as well.…”

Section: Stormwater Runoffmentioning

confidence: 99%

“…where EMC in and EMC out are respectively the pollutant EMCs measured at the inlet and outlet of the system, µ EMCin and µ EMCout represent the mean of EMCs measured respectively at the inlets and at the outlets of the CW. Walker et al [75] calculated these two efficiencies by taking into account some of the common pollutants detected in urban runoff (TSS, TN, TP, NH 3 -N, NO 3 -N, NO x -N), measured over two years (Table 3).…”

Section: Stormwater Runoffmentioning

confidence: 99%

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Sustainable Management and Successful Application of Constructed Wetlands: A Critical Review

Gorgoglione

Torretta

2018

Sustainability

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Constructed wetlands (CWs) are affordable and reliable green technologies for the treatment of various types of wastewater. Compared to conventional treatment systems, CWs offer an environmental-friendly approach, are low cost, have fewer operational and maintenance requirements, and have a high potential for being applied in developing countries; particularly in small rural communities. However, the sustainable management and successful application of these systems remain a challenge. Therefore, after briefly giving basic information on wetlands and summarizing the classification and use of current CWs, this study aims to provide sustainable solutions for the performance and applications of CWs. To accomplish this objective, design and management parameters of CWs, including macrophyte species, media types, water level, hydraulic retention time (HRT), and hydraulic loading rate (HLR), are discussed. The current study collects and presents results of more than 120 case studies from around the world. This work provides a tool for researchers and decision-makers for using CWs to treat wastewater in a particular area. This study presents an aid for informed analysis, decision-making, and communication.

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Section: Stormwater Runoffmentioning

confidence: 99%

Section: Stormwater Runoffmentioning

confidence: 99%

Sustainable Management and Successful Application of Constructed Wetlands: A Critical Review

Gorgoglione

Torretta

2018

Sustainability

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“…Constructed Floating Wetlands (CFWs) are an innovative stormwater treatment technology, designed to mimic both the structure and function of naturally occurring floating wetlands [1]. CFWs consist of buoyant artificial medium which floats on the water surface and is planted with emergent wetland plants.…”

Section: Introductionmentioning

confidence: 99%

“…There have been numerous studies undertaken in the past to assess the nutrient removal performance of CFWs for stormwater runoff in freshwater environments such as lakes and ponds [1,2,5,6,7,11]. Headley and Tanner [7] reported on different plant species that had been used in CFWs worldwide for water quality enhancement in freshwater environments.…”

Section: Introductionmentioning

confidence: 99%

Root and Shoot Biomass Growth of Constructed Floating Wetlands Plants in Saline Environments

Sanicola

Lucke

Stewart

et al. 2019

IJERPH

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Constructed Floating Wetlands (CFWs) are increasingly being used globally in freshwater environments such as urban lakes and ponds to remove pollutants from urban stormwater runoff. However, to date there has been limited research into the use and performance of these systems in saline environments. This study compared the root and shoot biomass growth and nutrient uptake of five different plant species, Chrysopogon zizanioides, Baumea juncea, Isolepis nodosa, Phragmites australis and Sarcocornia quinqueflora, in three different saltwater treatments over a 12-week period. The aim of the study was to identify which of the plant species may be most suitable for use in CFWs in saline environments. Plant nutrient uptake testing revealed that Phragmites australis had the greatest percentage increase (1473–2477%) of Nitrogen mass in the shoots in all treatments. Sarcocornia quinqueflora also had impressive Nitrogen mass increase in saltwater showing an increase of 966% (0.208 ± 0.134 g). This suggests that the use of Phragmites australis and Sarcocornia quinqueflora plants in CFWs installed in saline water bodies, with regular harvesting of the shoot mass, may significantly reduce Nitrogen concentrations in the water. Isolepis nodosa had the greatest percentage increase (112% or 0.018 ± 0.020 g) of Phosphorous mass in the shoots in the saltwater treatment. Baumea juncea had the greatest percentage increase (315% or 0.026 ± 0.012 g) of Phosphorous mass in the roots in the saltwater treatment. This suggests that the use of Isolepis nodosa and Baumea juncea plants in CFWs installed in saline water bodies may significantly reduce Phosphorous concentrations in the water if there was a way to harvest both the shoots above and the roots below the CFWs. The study is continuing, and it is anticipated that more information will be available on CFW plants installed in saline environments in the near future.

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“…FTWs are made up of floating matrices (floating bed), which are associated with ecological communities such as macrophytes and microorganisms (Kadlec & Wallace, 2009). The FTWs have been used since the 1900s in the US and 1920 in Japan (Ning et al, 2014), but are currently considered as an affordable and environmentally friendly technology for surface water eco-remediation (Walker et al, 2017).…”

Section: Journal Of Ecological Engineeringmentioning

confidence: 99%

Study on the Application of Floating Beds of Macrophites (Vetiveria zizanioides and Phragmites australis) in Pilot Scale for the Removal of Heavy Metals from Água Forte Stream (Alentejo-Portugal)

Borralho¹,

Gago²,

Almeida³

2020

J. Ecol. Eng.

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The surrounding area of the Roxo stream sub-basin (basin of the Sado River, Portugal) has completely sterile sections, jeopardizing the productivity of the agricultural activities practiced there. This may be due to the inflow of the Água Forte stream, which has characteristics of Acid Mining Drainage (AMD). The objective of this study was to test the efficiency of heavy metal removal from the Água Forte stream using the macrophyte floating bed technology (Vetiveria zizanioides and Phragmites australis) in a pilot plant, monitoring and evaluating the water quality and performance of macrophytes. Two experiments were carried out in 2019 over 6 months (January to June). Both experiments were performed in polyvinyl chloride (PVC) tanks with the nominal capacity of 1 m 3 each. The tanks were filled with about 0.8 m 3 of water coming from the Água Forte stream, which was renewed monthly. The floating beds consisted in a high-density polyethylene floating system and an organic plant support mat filled with a plant density of 285 plants m-2. The heavy metal removal rates obtained from the Vetiveria zizanioides and Phragmites australis floating bed were Fe = 40%; Zn = 33%; Cu = 23%; Mn = 14% and Fe = 27%; Zn = 19%; Mn = 17%; Cu = 14%; respectively. The order of heavy metals accumulation in Vetiveria zizanioides and Phragmites australis in plant biomass was Fe> Zn> Cu> Mn and Fe> Zn> Mn> Cu, respectively. The growth of Vetiveria zizanioides and Phragmites australis in leaf biomass was 7.1 ± 0.3 cm/month and 2.5 ± 0.0 cm/month and in root biomass 3.8 ± 0.1 cm/month and 4.1 ± 0.1 cm/month, respectively. The growth of macrophytes showed the ability to survive in the AMD-containing waters without severe damage in their external and anatomical morphology, although their growth suffered inhibition. The results suggest that the floating bed technology may be an environmentally sustainable alternative, allowing long-term heavy metal removal.

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Stormwater Treatment Evaluation of a Constructed Floating Wetland after Two Years Operation in an Urban Catchment

Cited by 41 publications

References 13 publications

Sustainable Management and Successful Application of Constructed Wetlands: A Critical Review

Sustainable Management and Successful Application of Constructed Wetlands: A Critical Review

Root and Shoot Biomass Growth of Constructed Floating Wetlands Plants in Saline Environments

Study on the Application of Floating Beds of Macrophites (Vetiveria zizanioides and Phragmites australis) in Pilot Scale for the Removal of Heavy Metals from Água Forte Stream (Alentejo-Portugal)

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