Laboratory study on stormwater biofiltration: Nutrient and sediment removal in cold temperatures

Blecken, Godecke-Tobias; Zinger, Yaron; Deletić, Ana; Fletcher, Tim D.; Hedström, Annelie; Viklander, Maria

doi:10.1016/j.jhydrol.2010.10.010

Cited by 96 publications

(47 citation statements)

References 42 publications

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“…Each bioretention system was sized at 5% of the catchment area. This dosing method was similar to that used in previous studies [18,28,31]. Synthetic runoff in this study was prepared to mimic local highly polluted runoff characteristics of chemical oxygen demand (COD), organic nitrogen (ON), ammonium-nitrogen (NH4 + -N), nitrate-nitrogen (NO3 − -N) and pH 6.5-7.5 (Table 2), according to Huang et al [32].…”

Section: Experimental Set-upmentioning

confidence: 99%

Effect of Saturated Zone on Nitrogen Removal Processes in Stormwater Bioretention Systems

Wang

Fan

Qin

et al. 2018

Water

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Abstract:The introduction of a saturated zone (SZ) has been recommended to address the issue of nitrogen removal fluctuation in the bioretention system, which is one of the most versatile low-impact development facilities for urban stormwater management. Nine experimental columns were used to characterize the nitrogen concentration variations over the outflow during wetting periods and in SZ during the antecedent drying periods (ADPs), as well as compare removal efficiencies of various nitrogen species in systems with different SZ depths under alternate drying and wetting conditions. Results indicated that NO 3 − -N concentrations in the outflow showed quasi-logistic curve-shaped variations over time: being low (<0.5 mg/L) in the early process, sharply increasing thereafter, and finally flattening around 3.0 mg/L with NO 3 − leaching; NH 4 + -N and organic nitrogen (ON) concentrations were consistently low around 0.5 mg/L and 1.8 mg/L, respectively during the wetting periods. NH 4 + removal efficiency in bioretention systems was consistently high around 80%, not varying with the increasing SZ depth; ON removal efficiency had a slight rise from 57% to 84% and NO 3 − removal efficiency was significantly enhanced from −23% to 62% with the SZ depth increasing from 0 to 600 mm. Deeper SZ could store more runoff and promote more denitrification of NO 3 − and mineralization of ON during the ADPs, providing more "old" water with low NO 3 − and ON concentrations for water exchange with "new" inflow of higher NO 3 − and ON concentrations during the wetting periods. The total nitrogen (TN) removal, a combined result of the instantaneous removal through adsorption and retention in the upper soil layer during the wetting periods and the gradual removal via denitrification and mineralization in SZ during the ADPs, was also improved by increasing the SZ depth; TN removal efficiency was elevated from 35% to 73% when the SZ depth increased from zero to 600 mm.

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Section: Experimental Set-upmentioning

confidence: 99%

Effect of Saturated Zone on Nitrogen Removal Processes in Stormwater Bioretention Systems

Wang

Fan

Qin

et al. 2018

Water

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“…The removal efficiency in non-vegetated biofilters was always not ideal (Blecken et al, 2010;Hunt et al, 2006) and all the more so when consider simultaneous P and N removal. The fate of different species of N and P is variable in biofilters.…”

Section: Introductionmentioning

confidence: 99%

Efficiency promotion and its mechanisms of simultaneous nitrogen and phosphorus removal in stormwater biofilters

Zhou

Cao

et al. 2016

Bioresource Technology

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“…nitrification and denitrification), whose rate is influenced by temperature, work best at 20-35°C, depending on the environment, with minimum nitrification temperatures of between 2 and 5.5°C (Stark 1996). Blecken et al (2010) reported a clear temperature dependency of nitrogen removal processes in vertical-flow wetlands when comparing their performance in a temperature range between 2 and 20°C. Semadeni-Davies (2006) investigated the performance of the pond section of the Bäckaslöv CSW under winter conditions.…”

Section: Seasonal Performance Of the Csw For Pollutant Removalmentioning

confidence: 99%

Effectiveness of a 19-Year Old Combined Pond-Wetland System in Removing Particulate and Dissolved Pollutants

et al. 2017

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This study monitored the stormwater runoff quantity and quality treatment performance of a 6.8 ha 19-year old combined pond-wetland system, located in south Sweden, over one year. The mean volume reductions for 53 storm events for the pond and wetland were 40% and 28%, respectively, while the mean flow reductions were 60% and 76%, respectively. Pollutant concentrations in the influent to the wetland were highly variable. The pond-wetland system could efficiently remove an average of 91%, 80%, 94%, 91%, 83% and 92% of TSS, TP, particulate Cd, Cu, Pb, and Zn, respectively, whereas the removal of particulate and dissolved Ni was highly variable with an average of 67% ± 62% and −5% ± 41%, respectively. The removal of TN, NH 4 -N and NO 3 + NO 2 -N was highly variable with an average of 45% ± 27%, 12% ± 96% and 45% ± 43%, respectively. These removal percentages are high in comparison to other studies and underline that relatively old systems can also provide efficient treatment. Although the pond accounted for a substantial reduction of pollutant concentration, the wetland significantly enhanced both the treatment performance and the peak flow reduction. This underlines that a combined pond/wetland system is a more beneficial solution than a pond only. The pollutant removal efficiency was significantly influenced by some factors including Antecedent Dry Days, seasonal variations, air temperature, retention times, rainfall depth and duration, and peak rainfall intensity.

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Laboratory study on stormwater biofiltration: Nutrient and sediment removal in cold temperatures

Cited by 96 publications

References 42 publications

Effect of Saturated Zone on Nitrogen Removal Processes in Stormwater Bioretention Systems

Effect of Saturated Zone on Nitrogen Removal Processes in Stormwater Bioretention Systems

Efficiency promotion and its mechanisms of simultaneous nitrogen and phosphorus removal in stormwater biofilters

Effectiveness of a 19-Year Old Combined Pond-Wetland System in Removing Particulate and Dissolved Pollutants

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