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The StormFilter is a stormwater filtration system containing replaceable, media-filled cartridges filled with filtering media that retain particles and sediments, and adsorb pollutants such as phosphorus, oils and grease, soluble metals, nutrients and organics1 .
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During rain events generating flow rates below the system’s treatment capacity, the operation of the vault with an integrated bypass structure remains the same as that of the standard vault.
When the flow rate exceeds the treatment capacity of the system, the excess flow is diverted to the outlet chamber over the weir wall. By segregating the treatment bay from the high velocity peak flows, the cartridges continue to operate normally which maintains performance and retains settles pollutants.
The evolution and implementation of a more stricter regulatory framework is gradually transforming traditional practices towards integrated stormwater management. Sewer system owners and managers must use new treatment solutions while ensuring the sustainability of infrastructure, in accordance with new environmental requirements. In addition to the removal of total suspended solids (TSS), oils and floating debris, the significant removal of nutrients, soluble metals and hydrocarbons from stormwater is now required.
The performance of the StormFilter filtration system has been verified and approuved by the Washington State Department of Ecology and approved by the MELCC.
StormFilter replaceable filtering cartridges are available in three activation heights to meet the specific hydraulic needs of the project, such as water level and treatment flow rate
Different types of filtering media are available, targeting TSS, phosphorus, soluble metals and nutrients.