Full-Scale Up-Flo® Stormwater Filter Field Verification Tests

Cai, Yezhao; Pitt, Robert; Bruenjes, Judy; Andoh, Robert

doi:10.1061/9780784412947.292

Cited by 1 publication

(6 citation statements)

References 6 publications

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“…Figures 7 and 8 show similar data for total nitrogen, also obtained by Cai (2015) at a parking lot site. Again, the large particles have high total nitrogen, likely due to their large organic content.…”

Section: Chemical Oxygen Demand and Nutrientssupporting

confidence: 67%

“…At some industrial sites, larger particles may be of metallic material instead of soil or organic material, with a less distinct nutrient increase with the large particle sizes. Figure 5 shows the accumulative contributions of different particle size ranges, while Figure 6 shows the particulate strengths for parking lot stormwater samples collected by Cai (2015). The largest size range has the largest strengths compared to other particle sizes, likely due to the organic content of this size range.…”

Section: Specific Gravity Of Stormwater Particlesmentioning

confidence: 99%

“…In a stormwater treatability study at an urban parking lot, Cai (2015) collected composite samples at the influent and effluent for an upflow treatment system at a parking lot in Tuscaloosa, Alabama. This was a complete mass balance analysis, so captured sediment was also evaluated.…”

Section: Specific Gravity Of Stormwater Particlesmentioning

confidence: 99%

“…In a stormwater treatability study at an urban parking lot, Cai (2015) collected composite samples in high density polyethylene bottles from the influent and effluent locations of the treatment controls. After each targeted storm event, the samples were brought to the laboratory as soon as possible and either cooled in a sample refrigerator or immediately processed.…”

Section: Pollutant Strengths By Particle Sizementioning

confidence: 99%

“…Bulk density of stormwater particulates was determined by analyzing collected sediment from stormwater control devices (Cai 2015). This material was air dried and then sieved into separate particle size ranges.…”

Section: Specific Gravity Of Stormwater Particlesmentioning

confidence: 99%

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Southeastern United States Observations of Stormwater Pollutant Strengths by Particle Size

Pitt

Clark

Cai

et al. 2017

JWMM

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This paper summarizes the results of several stormwater research projects that investigated particulate pollutant strengths for different particle size ranges. This paper builds on the previous paper simultaneously published describing particle size distributions of stormwater particulates (Pitt et al. 2016). The pollutant strength information presented in this paper, along with the particle size distribution in the other paper, is critical when understanding the routing of stormwater particulates through urban systems and especially when calculating the expected performance of stormwater controls. The pollutant concentrations commonly have a bimodal distribution, with higher values for small particles (due to large surface areas) and sometimes for large particles (such as for polycyclic aromatic hydrocarbons, PAHs, that are strongly associated with large organic debris). In most cases, the majority of the stormwater pollutant masses at outfalls are associated with small and moderate-sized particulates (usually from ~10 µm to 200 µm) which are effectively transported through drainage systems. Stormwater controls that focus on larger particles (such as >300 µm) that are more abundant at source areas may have less effective benefits on discharged stormwater quality as they only contribute small fractions of the total particulate mass after being poorly transported through most drainage systems. Treatability tests show that effective removal of particulate-bound stormwater pollutants requires the control of the small particles, usually down to ~10 µm in size. Pre-treatment stormwater controls that focus on larger particles reduce maintenance issues and provide other benefits, but need to be supplemented with additional controls that are effective in the removal of small particles, usually in a treatment train arrangement.

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Section: Chemical Oxygen Demand and Nutrientssupporting

confidence: 67%

Section: Specific Gravity Of Stormwater Particlesmentioning

confidence: 99%

Section: Specific Gravity Of Stormwater Particlesmentioning

confidence: 99%

Section: Pollutant Strengths By Particle Sizementioning

confidence: 99%

Section: Specific Gravity Of Stormwater Particlesmentioning

confidence: 99%

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