Phosphorus Removal, Metals Dynamics, and Hydraulics in Stormwater Bioretention Systems Amended with Drinking Water Treatment Residuals

Ament, Michael R.; Roy, Eric D.; Yuan, Yongping; Hurley, Stephanie

doi:10.1061/jswbay.0000980

Cited by 8 publications

(9 citation statements)

References 66 publications

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“…In the experiment, the WTR media was compared to a control consisting of washed gravel, pea stones, sand, and compost. When the experiment was terminated, Ament et al (2022) could observe that all P species were reduced in both filter media, but higher for all P species in the WTR media, probably due to P saturation of the control. Ament et al (2022) also investigated the water flow through the bioretention media and whether they would leach heavy metals.…”

Section: Water Treatment Residualsmentioning

confidence: 97%

“…When the experiment was terminated, Ament et al (2022) could observe that all P species were reduced in both filter media, but higher for all P species in the WTR media, probably due to P saturation of the control. Ament et al (2022) also investigated the water flow through the bioretention media and whether they would leach heavy metals. Ament et al (2022) reported that there were nothing affecting the hydraulic performance of the WTR media, nor of the control.…”

Section: Water Treatment Residualsmentioning

confidence: 97%

“…Water treatment residuals (WTR), a by-product generated in drinking water production when Al-or Fe-based coagulants are In a field experiment, WTR were tested in a bioretention experiment described by Ament et al (2022). The aim with the investigation was to study the removal of various P species, e.g., soluble reactive P, dissolved organic P, particulate P, and total-P present in storm water from a road.…”

Section: Water Treatment Residualsmentioning

confidence: 99%

“…Ament et al (2022) also investigated the water flow through the bioretention media and whether they would leach heavy metals. Ament et al (2022) reported that there were nothing affecting the hydraulic performance of the WTR media, nor of the control. Ament et al (2022) concluded that WTR effectively could reduce and retain P species without interference from hydraulic performances (Table 6).…”

Section: Water Treatment Residualsmentioning

confidence: 99%

See 3 more Smart Citations

Filter media for storm water treatment in sustainable cities: A review

Westholm

2023

Front. Chem. Eng.

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Section: Water Treatment Residualsmentioning

confidence: 97%

Section: Water Treatment Residualsmentioning

confidence: 97%

Section: Water Treatment Residualsmentioning

confidence: 99%

Section: Water Treatment Residualsmentioning

confidence: 99%

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Filter media for storm water treatment in sustainable cities: A review

Westholm

2023

Front. Chem. Eng.

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“…DWTRs are a byproduct of water treatment production [20] that have many promising environmental applications [21]. They have been incorporated into biofiltration media [22] and constructed wetlands [23] to remove P from incoming stormwater. DWTRs typically contains high amounts of amorphous aluminum (Al) and iron (Fe) minerals formed from Aland Fe-based coagulants [24].…”

Section: Introductionmentioning

confidence: 99%

Field Application of Spent Lime Water Treatment Residual for the Removal of Phosphorus and other Pollutants in Urban Stormwater Runoff

Pilgrim¹,

Kuster²,

Huser

2022

Water

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The threat of anthropogenic eutrophication and harmful algal blooms in lakes requires the development of innovative stormwater best management practices (BMPs) to reduce the external loading of phosphorus (P). This paper presents the findings of a 5-year study of a full-scale P removal structure constructed in Minnesota, USA with spent lime drinking water treatment residual (DWTR), a by-product of water softening at a local water treatment plant. Influent and effluent water samples were collected by auto-samplers during 43 storm events during the growing season. Samples were analyzed for P constituents, heavy metals, total suspended solids (TSS), and pH. Toxicity of the effluent was assessed using Ceriodaphnia dubia. Flow-weighted removal effectiveness was calculated for each storm event. Overall, the spent lime DWTR reduced total P loading by 70.9%, dissolved reactive P by 78.5%, dissolved P by 74.7%, and TSS by 58.5%. A significant reduction in heavy metals was also observed. Toxicity tests indicated the aquatic toxicity of the effluent treated with spent lime DWTR was not different from untreated stormwater. This study provided long-term real-world data that demonstrated that a full-scale P removal structure with spent lime DWTR significantly reduced P and other pollutants in stormwater discharging to an urban lake. Therefore, spent lime DWTR, which is currently treated as a waste product, is a promising filter material for stormwater treatment.

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Nitrogen removal performance in roadside stormwater bioretention cells amended with drinking water treatment residuals

et al. 2023

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Bioretention cells, a type of green stormwater infrastructure, have been shown to reduce runoff volumes and remove a variety of pollutants. The ability of bioretention cells to remove nitrogen and phosphorus, however, is variable and bioretention soil media can act as a net exporter of nutrients. This is concerning as excess loading of nitrogen and phosphorus can lead to eutrophication of surface waters, which green stormwater infrastructure is intended to ameliorate. Drinking water treatment residuals (DWTR), metal (hydr)oxide‐rich byproducts of the drinking water treatment process, have been studied as an amendment to bioretention soil media due to their high phosphorus sorption capacity. However, very few studies have specifically addressed the effects that DWTRs may have on nitrogen removal performance within bioretention cells. Here, we investigated the effects of DWTR amendment on nitrogen removal in bioretention cells treating stormwater in a roadside setting. We tested the capacity for three different DWTRs to either retain or leach dissolved inorganic nitrogen in the laboratory, and also conducted a full‐scale field experiment where DWTR‐amended bioretention cells and experimental controls were monitored for influent and effluent nitrogen concentrations over two field seasons. We found that DWTRs alone exhibit some capacity to leach nitrate and ammonium, but when integrated into sand‐ and compost‐based bioretention soil media DWTRs have little to no effect on the removal of nitrogen in bioretention cells. These results suggest that DWTRs can be used in bioretention media for enhanced phosphorus retention without risk of contributing to nitrogen export in bioretention effluent.This article is protected by copyright. All rights reserved

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Phosphorus Removal, Metals Dynamics, and Hydraulics in Stormwater Bioretention Systems Amended with Drinking Water Treatment Residuals

Cited by 8 publications

References 66 publications

Filter media for storm water treatment in sustainable cities: A review

Filter media for storm water treatment in sustainable cities: A review

Field Application of Spent Lime Water Treatment Residual for the Removal of Phosphorus and other Pollutants in Urban Stormwater Runoff

Nitrogen removal performance in roadside stormwater bioretention cells amended with drinking water treatment residuals

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