Hydraulic and pollutant removal performance of stormwater filters under variable wetting and drying regimes

2007 ◽  
Vol 56 (12) ◽  
pp. 11-19 ◽  
Author(s):  
B.E. Hatt ◽  
T.D. Fletcher ◽  
A. Deletic
Keyword(s):  
Pollutant Removal ◽  
Stormwater Treatment ◽  
Ecological Health ◽  
Infiltration Capacity ◽  
Treatment Technology ◽  
Wetting And Drying ◽  
Treatment Performance ◽  
Current Design ◽  
Receiving Waters ◽  
Drying Regime

Biofiltration systems are an effective stormwater treatment technology. However, their robustness is yet to be tested, particularly their performance following extended dry periods. The hydraulic and treatment performance of five different non-vegetated, soil-based filters under varying periods of inundation and drying was assessed. The infiltration capacity of the filters decreased during wet periods and increased following dry periods, most probably due to swelling and shrinkage of the filter media. Treatment of sediment, heavy metals and phosphorus was not influenced by the wetting and drying regime. However, outflow concentrations of nitrogen were significantly higher upon re-wetting following extended dry periods compared with wet periods. This result has implications for current design practices, as these nitrogen pulses could negatively impact the ecological health of downstream receiving waters.

Hydraulic and treatment performance of pervious pavements under variable drying and wetting regimes

2011 ◽  
Vol 64 (8) ◽  
pp. 1692-1699 ◽  
Author(s):  
C. F. Yong ◽  
A. Deletic ◽  
T. D. Fletcher ◽  
M. R. Grace
Keyword(s):  
Suspended Solids ◽  
High Flow ◽  
Pollutant Removal ◽  
Low Flow ◽  
Storm Event ◽  
Stormwater Treatment ◽  
Storm Events ◽  
Treatment Technology ◽  
Porous Asphalt ◽  
Treatment Performance

Pervious pavements are an effective stormwater treatment technology. However, their performance under variable drying and wetting conditions have yet to be tested, particularly under a continuous time scale. This paper reports on the clogging behaviour and pollutant removal efficiency of three pervious pavement types over 26 accelerated years. These pavements were monolithic porous asphalt (PA), Permapave (PP) and modular Hydrapave (HP). Over a cycle of 13 days, the period of which was equivalent to the average annual Brisbane, Australia rainfall (1,200 mm), the pavements were randomly dosed with four different flows. Drying events of 3 h duration were simulated during each flow. Inflow and outflow samples were collected and analysed for Total Suspended Solids (TSS), Total Phosphorus (TP) and Total Nitrogen (TN). To evaluate the rate of clogging, a 1 in 5 year Brisbane storm event was simulated in the 6th, 8th, 12th, 16th, 20th and 24th week. Under normal dosing conditions, none of the pavements showed signs of clogging even after 15 years. However, under storm conditions, both PA and HP started to clog after 12 years, while PP showed no signs of clogging after 26 years. The drying and various flow events showed no effects in TSS removal, with all systems achieving a removal of approximately 100%. The average TP removal was 20% for all flows except for low flow, which had a significant amount of leaching over time. Leaching from TN was also observed during all flows except high flow. The TSS, TP and TN results observed during storm events were similar to that of high flow.

Facilities for treatment of stormwater runoff from highways

2003 ◽  
Vol 48 (9) ◽  
pp. 113-121 ◽  
Author(s):  
G. Aldheimer ◽  
K. Bennerstedt
Keyword(s):  
Stormwater Runoff ◽  
Water Bodies ◽  
Water Inflow ◽  
Stormwater Treatment ◽  
Treatment Technology ◽  
Water Company ◽  
Receiving Waters ◽  
Technology Competition ◽  
Under Construction ◽  
The City

Stormwater is the major water inflow to many water bodies in Stockholm. Stockholm City has adopted a strategy, which defines the need to treat different kinds of stormwater entering different receiving waters. The Stockholm Water Company has tested various ways of treating stormwater. In 2000, the City of Stockholm arranged a stormwater treatment technology competition. Prizes were awarded to four winning entries. One installation was completed in 2001 and another is now under construction.

Filter media for stormwater treatment and recycling: the influence of hydraulic properties of flow on pollutant removal

2006 ◽  
Vol 54 (6-7) ◽  
pp. 263-271 ◽  
Author(s):  
B.E. Hatt ◽  
N. Siriwardene ◽  
A. Deletic ◽  
T.D. Fletcher
Keyword(s):  
Removal Efficiency ◽  
Pollutant Removal ◽  
Control Measures ◽  
Stormwater Treatment ◽  
Filter Media ◽  
Infiltration Capacity ◽  
Detention Time ◽  
The Individual ◽  
The Impact ◽  
Pollutant Removal Efficiency

Improved urban water management in Australia is of national importance. Water resources are stretched and urban runoff is a recognized leading cause of degradation of urban waterways. Stormwater recycling is an option that can contribute to easing these problems. Biofilters are effective structural stormwater pollution control measures with the potential for integration into stormwater treatment and recycling systems. However, premature clogging of biofilters is a major problem, with resulting decreased infiltration capacity (and hence the volume of stormwater the system can detain) and increased detention time. This paper presents preliminary findings with respect to the effect of clogging on pollutant removal efficiency in conventional stormwater filter media. A one-dimensional laboratory rig was used to investigate the impact of clogging on pollutant removal efficiency in a conventional biofiltration filter media (gravel over sand). Both the individual gravel layer and the overall multi-filter were highly efficient at removing suspended solids and particulate-associated pollutants. This removal efficiency was consistent, even as the filters became clogged. Removal of dissolved nutrients was more variable, with little reduction in concentrations overall. Although preliminary, these results challenge the concept that increased detention time improves the treatment performance of stormwater filtration systems.

Retrofitting Stormwater Ponds for Water Quality Control

1992 ◽  
Vol 27 (2) ◽  
pp. 403-422 ◽  
Author(s):  
J. Marsalek ◽  
W. E. Watt ◽  
D. Henry
Keyword(s):  
Water Quality ◽  
Structural Changes ◽  
Ecosystem Approach ◽  
Pollutant Removal ◽  
Stormwater Treatment ◽  
Water Quality Control ◽  
Peak Shaving ◽  
Aquatic Life ◽  
Stormwater Ponds ◽  
Receiving Waters

Abstract During the last 15 years, many stormwater ponds were built in Canada. These ponds were designed to control runoff flows by peak shaving and thereby prevent flooding resulting from urbanization, but they are ineffective in protection of water quality in the receiving waters. Thus, one of the emerging challenges in urban water management is the retrofitting of existing stormwater ponds to meet the current environmental concerns. The retrofitting measures proposed include changes in flow regimes, storage pool volumes and flow velocities, achievable by structural changes in inlet, storage and outlet structures; treatment of runoff by sedimentation or filtration; enhancement of biological processes contributing to pollutant removal through longer detentions and introduction of aquatic plants; and, improvement of aquatic life habitat. A case is made for an ecosystem approach where the pond is one element in the urban stormwater treatment train which controls catchment, pond and receiving waters.

scholarly journals Improving the Treatment Performance of Low Impact Development Practices—Comparison of Sand and Bioretention Soil Mixtures Using Column Experiments

Water ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1210
Author(s):  
Abtin Shahrokh Hamedani ◽  
Arianne Bazilio ◽  
Hanieh Soleimanifar ◽  
Heather Shipley ◽  
Marcio Giacomoni
Keyword(s):  
Phosphorus Removal ◽  
Low Impact Development ◽  
Pollutant Removal ◽  
Control Measures ◽  
Column Experiments ◽  
Removal Rates ◽  
Treatment Performance ◽  
Soil Mixtures ◽  
Limestone Sand ◽  
The Impact

Low impact development (LID) practices, such as bioretention and sand filter basins, are stormwater control measures designed to mitigate the adverse impacts of urbanization on stormwater. LID treatment performance is highly dependent on the media characteristics. The literature suggests that bioretention media often leach nutrients in the stormwater effluent. The objective of this study was to analyze the treatment performance of different sand and bioretention soil mixtures. Specifically, this investigation aimed to answer whether the use of limestone and recycled glass could improve the treatment performance of bioretention systems. Column experiments were designed to assess (1) the removal efficiencies of different sand and bioretention soil mixtures and (2) the impact of plant uptake on removal rates. Enhanced pollutant removal was observed for the custom blends with addition of limestone sand, indicating mean dissolved and total phosphorus removal of 44.5% and 32.6% respectively, while the conventional bioretention soil mixtures leached phosphorus. Moreover, improved treatment of dissolved and total copper was achieved with mean removal rates of 70.7% and 93.4%, respectively. The results suggest that the nutrient effluent concentration decreased with the addition of plants, with mean phosphorus removal of 72.4%, and mean nitrogen removal of 22% for the limestone blend.

scholarly journals Hydrologic Modelling of Construction Site Sediment Control Pond Using SWMM

2021 ◽  
Author(s):  
Renata Krasnova
Keyword(s):  
Stormwater Management ◽  
Current Control ◽  
Control Measures ◽  
Background Information ◽  
Construction Site ◽  
Stormwater Treatment ◽  
Hydrologic Modelling ◽  
Sediment Control ◽  
Sources Of Pollution ◽  
Receiving Waters

Construction activities have been identified as one of the major sources of pollution to receiving waters. Although Erosion and Sediment Control (ESC) measures reduce the amount of sediment exported from construction sites, there are still significant concerns regarding the sufficiency of current control measures to protect receiving waters. This study documents the work completed to monitor and model the performance of a typical stormwater management facility used for erosion and sediment control in suburban construction site. The main objective of this study is to provide background information regarding the performance of stormwater management facilities for treating urban construction runoff prior to discharging to receiving water bodies. The RUNOFF and STORAGE TREATMENT blocks of EPA's stormwater management model (PCSWMM4.4) were used to simulate the quantity and quality of stormwater run-off from the area under construction and assess the performance of stormwater treatment facility (Ballymore Pond) located in Richmond Hill, Ontario. The performance of the construction site sediment control pond was found to be unsatisfactory due to the high outflow concentration of suspended solids. Some specific recommendations to improve its effectiveness have been made.

scholarly journals Hydrologic Modelling of Construction Site Sediment Control Pond Using SWMM

2021 ◽  
Author(s):  
Renata Krasnova
Keyword(s):  
Stormwater Management ◽  
Current Control ◽  
Control Measures ◽  
Background Information ◽  
Construction Site ◽  
Stormwater Treatment ◽  
Hydrologic Modelling ◽  
Sediment Control ◽  
Sources Of Pollution ◽  
Receiving Waters

Construction activities have been identified as one of the major sources of pollution to receiving waters. Although Erosion and Sediment Control (ESC) measures reduce the amount of sediment exported from construction sites, there are still significant concerns regarding the sufficiency of current control measures to protect receiving waters. This study documents the work completed to monitor and model the performance of a typical stormwater management facility used for erosion and sediment control in suburban construction site. The main objective of this study is to provide background information regarding the performance of stormwater management facilities for treating urban construction runoff prior to discharging to receiving water bodies. The RUNOFF and STORAGE TREATMENT blocks of EPA's stormwater management model (PCSWMM4.4) were used to simulate the quantity and quality of stormwater run-off from the area under construction and assess the performance of stormwater treatment facility (Ballymore Pond) located in Richmond Hill, Ontario. The performance of the construction site sediment control pond was found to be unsatisfactory due to the high outflow concentration of suspended solids. Some specific recommendations to improve its effectiveness have been made.

Performance of enviss™ stormwater filters: results of a laboratory trial

2012 ◽  
Vol 66 (4) ◽  
pp. 719-727 ◽  
Author(s):  
K. Bratières ◽  
C. Schang ◽  
A. Deletić ◽  
D. T. McCarthy
Keyword(s):  
Heavy Metals ◽  
Detrimental Effect ◽  
Loading Rate ◽  
Stormwater Treatment ◽  
Nutrient Treatment ◽  
Treatment Performance ◽  
Testing Period ◽  
Harvesting Systems ◽  
Laboratory Trial ◽  
Almost All

An experimental study was undertaken by Monash University to develop and test enviss™ stormwater treatment and harvesting technologies – non-vegetated filtration systems with an extremely low footprint. This paper focuses on the water quality and hydraulic performance of two systems tested over a ‘year’ of operation in a Melbourne climate: (1) REUSE enviss™ filters, designed for stormwater harvesting systems for non-potable supply substitution, and (2) WSUD enviss™ filters, developed to treat urban stormwater prior to discharge to downstream systems. The presence of chlorine as a disinfection agent proved to be very efficient for the removal of microorganisms in REUSE enviss™ filters. WSUD enviss™ filters had the benefit of providing an elevated nutrient treatment performance, due to an extended depth of filter media. However, nutrient outflow concentrations (total nitrogen (TN) in particular) were found to increase during the testing period. Also, extended dry weather periods were found to have a detrimental effect on the treatment performance of almost all pollutants for both filters (nutrients, Escherichia coli and heavy metals). Although hydraulic conductivity results indicated two or three sediment trap replacements per year are required to maintain filtration rates, it is expected that the compressed loading rate schedule overestimated this maintenance frequency.

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