Using Floating Wetland Treatment Systems to Reduce Stormwater Pollution From Urban Developments

Schwammberger, Peter; Walker, Chris; Lucke, Terry

doi:10.21660/2017.31.6532

Cited by 21 publications

(11 citation statements)

References 16 publications

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“…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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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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“…This paper describes the results of a two-year field study undertaken to evaluate the pollution removal performance of a CFW designed to treat stormwater runoff from an existing urban development in Queensland, Australia. Preliminary results of this study were presented in Nichols et al [11] and Schwammberger et al [12].…”

Section: Introductionmentioning

confidence: 71%

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

Walker¹,

Tondera

Lucke

2017

Sustainability

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Constructed Floating Wetlands (CFW) for stormwater treatment are increasingly used to treat urban runoff. However, studies of large-scale systems and the long-term evaluation of their treatment efficiency are scarce. This article presents the final results of a two-year study of the pollutant removal performance of a CFW in a stormwater pond capturing runoff from a low-residential catchment in South-East Queensland (Australia) under subtropical conditions. Although the CFW treatment area to catchment ratio was only 0.14%, the results demonstrated a significant removal of both Total Suspended Solids (TSS) and Total Phosphorus (TP) from the stormwater inflows by the CFW. The efficiency ratios for TSS and TP were 81% and 52%, respectively. While the removal rate for total nitrogen was not significant for the CFW evaluated in this study, the ER was still 17%. However, the ERs for nitrate and nitrogen oxide were both 47%. The study results suggest that it may be possible to increase the pollution removal performance of the CFW by upsizing the system and including intermittent re-aeration zones in the surrounding stormwater pond. The results of this research study clearly demonstrate that CFW can be an effective treatment solution for the removal of pollution from urban stormwater runoff.

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“…When more than one CW type is combined in one facility, this is called a hybrid wetland system. Furthermore, floating treatment wetlands (FTWs) are artificial wetland systems that mimic the water treatment processes occurring in natural floating wetland islands and consist in a floating structure planted with emergent macrophytes [28]. The two key characteristics of CWs are the plant species and the substrate media.…”

Section: The Technology Of Constructed Wetlandsmentioning

confidence: 99%

The Role of Constructed Wetlands as Green Infrastructure for Sustainable Urban Water Management

2019

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Nowadays, it is better understood that the benefits of green infrastructure include a series of ecosystem services, such as cooling, water storage and management, recreation and landscaping, among others. Green technologies are still developing to provide sustainable solutions to the problems that modern cities and peri-urban areas face at an ever-increasing rate and intensity. Constructed wetlands technology is an established green multi-purpose option for water management and wastewater treatment, with numerous effectively proven applications around the world and multiple environmental and economic advantages. These systems can function as water treatment plants, habitat creation sites, urban wildlife refuges, recreational or educational facilities, landscape engineering and ecological art areas. The aim of this article is to highlight the synergies between this green technology and urban areas in order to reconnect cities with nature, to promote circularity in the urban context and to apply innovative wetland designs as landscape infrastructure and water treatment solutions. This approach could be a step further in the effort to mitigate the current degradation process of the urban landscape. Following the concept of green infrastructure, the article presents and suggests ways to integrate wetland technology in the urban environment, namely: (i) stormwater and urban runoff management (storage and treatment of water during storm events) to provide protection from flood incidents, especially considering climate change, (ii) innovative low-impact infrastructure and design solutions for urban wastewater treatment, and (iii) wetland technology for habitat creation and ecosystem services provision.

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Using Floating Wetland Treatment Systems to Reduce Stormwater Pollution From Urban Developments

Cited by 21 publications

References 16 publications

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

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

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

The Role of Constructed Wetlands as Green Infrastructure for Sustainable Urban Water Management

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