Evaluation of solids removal and optimisation of backwashing for an upflow stormwater filtration system utilising novel floating fibrous media

Hwang, Yuhoon; Seo, Younggyo; Kim, Hyo-Won; Roh, Kunwan; Kim, Do-Gun

doi:10.1080/09593330.2019.1694080

Cited by 4 publications

(6 citation statements)

References 32 publications

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“…In highly controlled laboratory experiments, [21] studied the effectiveness of an up-flow filtration system using a novel polypropylene fibrous media. This new media is highly porous, and forms a floating filtration layer.…”

Section: Discussionmentioning

confidence: 99%

Stormwater Filtration Performance for the Ecosol Storm Pit (Class 2): Statistical Analysis of Field Data

Nejad

Zecchin

2020

Water

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An independent field performance evaluation for a secondary stormwater filtration device, named the Ecosol Strom Pit (Class 2), was performed between May 2017 and July 2019 in an urban catchment in Queensland, Australia. During the testing period, a total of 37 rainfall events were recorded, of which between 15 and 21 events were evaluated as qualifying for the purposes of characterizing the removal efficiency performance of the device. A statistical analysis of the event mean concentrations (EMCs) of the flow streams through the device indicate a statistically significant difference between the influent and effluent streams. A variety of pollutant removal evaluation metrics, including concentration-based and total load-based metrics, were utilized in this study to characterise the efficacy of the device. Two new approaches are proposed for facilitation the analysis: a nonlinear regression approach to more effectively deal with nonlinear patterns in the influent and effluent data and the regression of concentration (ROC), which is an added concentration-based metrics. In summary, the removal efficiencies of the Ecosol Storm Pit (Class 2) were evaluated to be 72–74% for total suspended solids (TSS), 45–50% for total phosphorus (TP), 41–45% for total nitrogen (TN), 27–32% for total heavy metals (THM), 79–85% for total petroleum hydrocarbons (TPH), and 80–88% for total recoverable hydrocarbons (TRH).

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Section: Discussionmentioning

confidence: 99%

Stormwater Filtration Performance for the Ecosol Storm Pit (Class 2): Statistical Analysis of Field Data

Nejad

Zecchin

2020

Water

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“…Many previous research studies revealed that total suspended solids (TSS) mainly removed within the very top layers (surface to 50-200 mm depth) [25,26], but it will lead to the clogging of surface media [27], with a decline of hydrologic conductivity. A pretreatment chamber of suspended solid showed a high removal rate of TSS [28] and it can be a good solution to control the clogging problem in future research. Additionally, the current study mainly focused on the function of different layers, especially the transition layer and drainage layer, and suspended solids have no influence on these two layers.…”

Section: Water Quality Effects Of Each Structural Layermentioning

confidence: 93%

Hydrologic and Pollutant Removal Performance of Media Layers in Bioretention

Yang

Liu

et al. 2020

Water

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The current study was aimed to investigate the filler layer structure in modified bioretention systems. Three different structural layers in bioretention were proposed to evaluate their hydrologic performance and pollutant removal efficiency under different rainfall intensities. These layers were as follows: all three layers (filter, transition, and drainage layers), without transition layer, and without drainage layer. Synthetic stormwater was used for experimental purpose in current work. Results revealed that compared with “all three layers”, runoff control rate of “without transition layer” and “without drainage layer” was reduced by 0 to 7.4%, 0 to 10.1%, and outflow start time was advanced by 6 to 8 min and 1.5 to 4.5 min, respectively. Moreover, CODcr (chemical oxygen demand), NH4+-N (ammonium nitrogen), TN (total nitrogen) and TP (total phosphorus) removal rates were 86.0%, 85.4%, 71.8%, and 68.0%, respectively. Particle size distribution of the fillers revealed that during operation, particle moved downward were mainly within 0.16–0.63 mm size. Findings showed that transition and drainage layer played an important role in runoff control, and total height of the filler layer should not be less than 800 mm. Filter layer effectively reduce runoff pollution but the thickness of the filter layer should not be less than 500 mm. Whereas, transition layer has the function of preventing the filler loss of the filter layer; therefore, proper measures must be taken into consideration during structural optimization.

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“…Harmful chemicals absorbed by the MP that is already toxic could have adverse health effects on humans, as they made their way into marine and freshwater species. Nevertheless, the management of stormwater becomes more complicated when it involves nonpoint source pollution [17]. Stormwater is also associated with aesthetics, aquatic life, impaired recreational use, and public health and safety issues.…”

Section: Stormwater Managementmentioning

confidence: 99%

“…The composition of stormwater runoff, quality, and quantity is highly variable in space and time as it has intermittent nature [28]. This stormwater quality fluctuates and is influenced by the interrelation of several factors, primarily by heavy precipitation [2], runoff that is generated irregularly [17], rainfall duration, antecedent dry days, landuse [29], the surface type and imperviousness, atmospheric and climate conditions, total population, waste disposal practices, the construction activities and rapid urbanization. For instance, the stormwater quality from relatively clear surfaces, such as a rooftop, is generally better than the one that flows over heavy traffic roads.…”

Section: Stormwater Characteristicsmentioning

confidence: 99%

“…Rainfall intensity led to decreased contact time between feed water and media, thus reducing performance [20]. TSS would also discharge better when stagnant water was drained before the backwash [17]. There is infiltration rate recovery following an extended dry period as potentially drying reduces interstitial clogging and pores through surface sediment layer cracking, which causes faster infiltration [28].…”

Section: Future Perspectivesmentioning

confidence: 99%

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A Review on the Application of Granular Filter Media and the Utilization of Agro-Industrial Wastes for Stormwater Quality Improvement

2021

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The stormwater management practices have changed from conveyance-oriented to storage-oriented, as part of the Best Management Practices (BMPs). Still, uncontrolled development increases potential pollutants in the stormwater, which conveys into a water body or river. Continuous improvements in the filtration mechanism would complement stormwater management. For the past decades, there is progress in applying granular filter media for stormwater quality improvement. However, the reports were not systematically reviewed. In this paper, the recent five years research that utilizes granular filter media for improving stormwater quality was retrieved and reviewed. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) was referred to, where Scopus and Web of Sciences, two primary journal databases, were used. Initially, keywords searching strings have resulted in 467 articles, which were further screened. Four themes have been formed: stormwater management, stormwater characteristics, separation mechanisms, and future perspectives. Next, two sub-themes and two sub-sub-themes were further established. Then, 65 articles were included manually to complement the themes developed to explore the potential agro-industrial wastes as sustainable filter media. Therefore, this review has proven that the relatively inexpensive and renewable resources from the agro-industrial wastes can remove pollutants efficiently from the stormwater. Four main criteria affecting filter media performances are also highlighted, including the grain sizes of the media, media bed configuration, hydraulic loading rate, and the suspended solids concentration. Further study on these variables can be beneficial to explore the impact of utilizing agro-based media in stormwater filtration.

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Evaluation of solids removal and optimisation of backwashing for an upflow stormwater filtration system utilising novel floating fibrous media

Cited by 4 publications

References 32 publications

Stormwater Filtration Performance for the Ecosol Storm Pit (Class 2): Statistical Analysis of Field Data

Stormwater Filtration Performance for the Ecosol Storm Pit (Class 2): Statistical Analysis of Field Data

Hydrologic and Pollutant Removal Performance of Media Layers in Bioretention

A Review on the Application of Granular Filter Media and the Utilization of Agro-Industrial Wastes for Stormwater Quality Improvement

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