Nutrient pollution is a widespread and challenging problem in urban stormwater management. Stormwater runoff carries nitrogen and phosphorus from fertilizer, pet waste and other sources to receiving waters where these nutrients can contribute to harmful algal blooms. Existing stormwater treatment technologies, which were developed to target total suspended solids (TSS), total phosphorus, and dissolved metals, do not reduce nitrogen concentrations in a significant way.
We are seeking technologies to remove nitrogen from urban stormwater runoff that can be used in combination with existing treatment methods, like bioretention, biofiltration or filtration.
- Capable of reliably removing at least 50% of total nitrogen from urban stormwater
- Can be deployed in urban stormwater drainage systems
- Does not export pollutants, including sediment, phosphorus, or metals
- A passive approach that does not require chemical or energy inputs
- Accommodates treatment flow rates in the range of 1-2 gpm per square foot of treatment area
- Capable of removing phosphorus as well as nitrogen
Oldcastle Infrastructure is part of CRH, the leading global diversified building materials business. We are the #1 manufacturer of concrete products in North America, offering a range of precast concrete and polymer-based products such as underground vaults, drainage pipe and structures, utility enclosures and modular precast structures, which are supplied to the water, energy, communications, transportation and building structures markets.
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