Nutrient uptake by constructed floating wetland plants during the construction phase of an urban residential development

Using Constructed Floating Wetlands to Remove Nutrients from a Waste Stabilization Pond

“…In order to evaluate the plant response and growth rates of the individual plant species in the wastewater, the plants were monitored for a period of 12 months from January 2019 to January 2020 using a similar method to that used by Schwammberger et al (2019). The original study plan only allowed for intensive and continual plant monitoring and analysis for a period of eight months (January-August 2019) due to budgetary and logistical constraints.…”

“…A selection of the dried plant samples described above was prepared and sent to the University of Queensland (Australia) laboratories for nutrient analysis using a similar method to that used by Schwammberger et al [17]. Five of the ten dried plant samples were collected in January and August, and three of the five dried plant samples collected from the intermediate sampling visits were randomly selected for nutrient analysis.…”

“…This indicates that the nutrient concentration within the plant tissue may be influenced by a number of factors. Schwammberger et al [17] suggested that the nutrient concentration within the plant tissue may be positively correlated to the nutrient concentration in the in situ water environment. Therefore, it was hypothesized that the nutrient concentration of the plant tissues in the current study would be greater than the concentrations found in previous studies using stormwater or simulated waters, and this appears to be the case.…”

Wetlands for environmental protection

“…In order to capture and treat stormwater in an eco‐friendly manner, urban communities have started to use CWs. Stormwater runoff during the construction phase of 45‐ha residential development was treated in sedge ( Carex appressa ) plants planted large‐scale constructed floating wetlands and the results demonstrated that the CW uptake large amounts of TN (20.20 ± 2.07 kg over the 16‐months study period) (Schwammberger, Lucke, Walker, & Trueman, 2019). Rahman, Roberts, Grace, Kessler, & Cook, 2019 studied the role of natural organic carbon and acetate on two competing nitrate reduction pathways (denitrification and dissimilatory nitrate reduction to ammonium (DNRA)) in constructed stormwater urban wetlands, and this study concluded that the nitrate reduction was enhanced more by addition of natural organic carbon than acetate.…”

Distributed treatment systems

“…Schwammberger, Lucke, Walker, and Trueman (2019) utilized tall sedge ( Carex appressa ) as a medium in constructed floating wetlands (CFW) for nutrient removal from stormwater runoff into a 2.6 hectacre lake during the construction of a residential area. Over the course of the 16‐month study, researchers found that CFW1 exhibited 20.20 kg of N uptake and 12.59 kg of K uptake, while CFW2 exhibited 15.00 kg of N uptake and 7.2 kg of K uptake, thus indicated the benefits of utilizing a CFW for nutrient removal from stormwater during construction.…”