A recent nationwide study reports that most stormwater pollutants are approximately 45% dissolved... more A recent nationwide study reports that most stormwater pollutants are approximately 45% dissolved. Stormwater filtration does not have a mechanism to consistently capture dissolved pollutants over the life-cycle of a treatment practice, and therefore a large portion of the pollutant load is entering our soils untreated. This presentation will discuss proven amendments for capturing dissolved pollutants including iron and compost. Data from laboratory and field studies will be shown and case studies of field applications will be examined.
All in-text references underlined in blue are linked to publications on ResearchGate, letting you... more All in-text references underlined in blue are linked to publications on ResearchGate, letting you access and read them immediately.
Most treatment practices for urban runoff utilize either settling or filtration to remove compoun... more Most treatment practices for urban runoff utilize either settling or filtration to remove compounds associated with particulates (e.g., phosphorus) while dissolved substances are typically not captured. Dissolved phosphorus, for example, represents an average of 35-45% of total phosphorus in stormwater but can be more than 95% at some locations. Previous research has shown that a combination of sand filtration with 0.3 to 5% by weight steel wool can capture 34% to 81% dissolved phosphorus (1). In this study, iron filings were tested as an enhancement to sand filtration for removing dissolved phosphorus for synthetic stormwater. Iron filings sand columns capture on average between 35% and 93% dissolved phosphorus, depending on the fraction of iron filings used, which is significantly more than C 33 sand alone. A field application of an iron-enhanced sand filter was installed in Maplewood, Minnesota using approximately 5% iron filings by weight with the purpose of removing both total and dissolved phosphorus from stormwater runoff. A model developed from the column studies is used to predict the phosphorus removal in the field application.
University of Minnesota Ph.D. dissertation. 2017. Major: Civil Engineering. Advisors: John Gulliv... more University of Minnesota Ph.D. dissertation. 2017. Major: Civil Engineering. Advisors: John Gulliver, William Arnold. 1 computer file (PDF); 145 pages.
All in-text references underlined in blue are linked to publications on ResearchGate, letting you... more All in-text references underlined in blue are linked to publications on ResearchGate, letting you access and read them immediately.
University of Minnesota Water Resources Center, Minnesota Stormwater Research Council, Anoka Cons... more University of Minnesota Water Resources Center, Minnesota Stormwater Research Council, Anoka Conservation District
Maintenance of stormwater treatment practices is critical to preserve their function and performa... more Maintenance of stormwater treatment practices is critical to preserve their function and performance. The performance of a stormwater treatment practice, however, must be determined before maintenance can be properly selected and scheduled. Stormwater managers, engineers, and staff need standardized methods to assess and maintain existing stormwater treatment practices. This paper will discuss methods from a NEW online manual developed specifically to help users assess performance and schedule maintenance for stormwater treatment practices such as stormwater ponds, bioretention facilities, infiltration basins, swales, and filter strips. The methods discussed will also help with permitting and reporting requirements such as total maximum daily loads (TMDLs) and anti-degradation requirements, which are often based on the mass balance of pollutant loads, pollutant removal rates, and/or numeric water quality goals. This paper will also include a brief discussion of actual maintenance fr...
This manual was created with funding provided by the Minnesota Pollution Control Agency, project ... more This manual was created with funding provided by the Minnesota Pollution Control Agency, project number 347-6053. Funding for partner projects was provided by the Minnesota Metropolitan Council Environmental Services, project number 347-6054, and the Minnesota Local Road Research Board, contract number 81655 Work Order 162, project number 536-6270. In-kind assistance provided by Dakota County through a study funded by the Water Environment Research Foundation was appreciated.
A recent nationwide study reports that most stormwater pollutants are approximately 45% dissolved... more A recent nationwide study reports that most stormwater pollutants are approximately 45% dissolved. Stormwater filtration does not have a mechanism to consistently capture dissolved pollutants over the life-cycle of a treatment practice, and therefore a large portion of the pollutant load is entering our soils untreated. This presentation will discuss proven amendments for capturing dissolved pollutants including iron and compost. Data from laboratory and field studies will be shown and case studies of field applications will be examined.
All in-text references underlined in blue are linked to publications on ResearchGate, letting you... more All in-text references underlined in blue are linked to publications on ResearchGate, letting you access and read them immediately.
Most treatment practices for urban runoff utilize either settling or filtration to remove compoun... more Most treatment practices for urban runoff utilize either settling or filtration to remove compounds associated with particulates (e.g., phosphorus) while dissolved substances are typically not captured. Dissolved phosphorus, for example, represents an average of 35-45% of total phosphorus in stormwater but can be more than 95% at some locations. Previous research has shown that a combination of sand filtration with 0.3 to 5% by weight steel wool can capture 34% to 81% dissolved phosphorus (1). In this study, iron filings were tested as an enhancement to sand filtration for removing dissolved phosphorus for synthetic stormwater. Iron filings sand columns capture on average between 35% and 93% dissolved phosphorus, depending on the fraction of iron filings used, which is significantly more than C 33 sand alone. A field application of an iron-enhanced sand filter was installed in Maplewood, Minnesota using approximately 5% iron filings by weight with the purpose of removing both total and dissolved phosphorus from stormwater runoff. A model developed from the column studies is used to predict the phosphorus removal in the field application.
University of Minnesota Ph.D. dissertation. 2017. Major: Civil Engineering. Advisors: John Gulliv... more University of Minnesota Ph.D. dissertation. 2017. Major: Civil Engineering. Advisors: John Gulliver, William Arnold. 1 computer file (PDF); 145 pages.
All in-text references underlined in blue are linked to publications on ResearchGate, letting you... more All in-text references underlined in blue are linked to publications on ResearchGate, letting you access and read them immediately.
University of Minnesota Water Resources Center, Minnesota Stormwater Research Council, Anoka Cons... more University of Minnesota Water Resources Center, Minnesota Stormwater Research Council, Anoka Conservation District
Maintenance of stormwater treatment practices is critical to preserve their function and performa... more Maintenance of stormwater treatment practices is critical to preserve their function and performance. The performance of a stormwater treatment practice, however, must be determined before maintenance can be properly selected and scheduled. Stormwater managers, engineers, and staff need standardized methods to assess and maintain existing stormwater treatment practices. This paper will discuss methods from a NEW online manual developed specifically to help users assess performance and schedule maintenance for stormwater treatment practices such as stormwater ponds, bioretention facilities, infiltration basins, swales, and filter strips. The methods discussed will also help with permitting and reporting requirements such as total maximum daily loads (TMDLs) and anti-degradation requirements, which are often based on the mass balance of pollutant loads, pollutant removal rates, and/or numeric water quality goals. This paper will also include a brief discussion of actual maintenance fr...
This manual was created with funding provided by the Minnesota Pollution Control Agency, project ... more This manual was created with funding provided by the Minnesota Pollution Control Agency, project number 347-6053. Funding for partner projects was provided by the Minnesota Metropolitan Council Environmental Services, project number 347-6054, and the Minnesota Local Road Research Board, contract number 81655 Work Order 162, project number 536-6270. In-kind assistance provided by Dakota County through a study funded by the Water Environment Research Foundation was appreciated.
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