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AquaShield Inc. has improved the patented Aqua-Guardian Catch Basin Insert by increasing the treatment flow rates while maintaining TSS and debris removal efficiency. Filtration of fine sediment and associated pollutants transported during the first flush of the storm continues to be the initial level of treatment.
Each Aqua-Guardian Insert includes a sediment collection/storage area within the HDPE structure. Traditionally, the filter media utilized in the Aqua-Guardian Insert is 100% reclaimed hydrophobic cellulose. Perlite and other natural filter materials are also available in easy to remove filter containers. |
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System Operation |
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The Aqua-Guardian Catch Basin Insert is suspended inside the catch basin by a stainless steel support collar, which acts as a funnel to direct runoff water into the sediment collection and storage area. The support collar forms a baffle around the inside of the insert which acts to trap floatable debris, even during overflow conditions.
 Stormwater enters the Aqua-Guardian from the surface and accumulates in the sediment chamber to begin the treatment process of capturing pollutants. As the storm continues, water flows through the locked filter screen standpipe and is dispersed over the filter media where fine sediment, petroleum hydrocarbons, nutrients (phosphates) and heavy metals (zinc) are removed before exiting the insert through the base plate.
As the runoff increases, water rises in the sediment chamber to the level of the “filter screen outlets” built into the perimeter of HDPE structure. Removal, or treatment, of sediment and debris continues at increased flow rates as shown in the Aqua-Guardian Catch Basin Insert Sizing Chart. The internal high-flow bypass openings at the top of the structure reduce the possibility of water backing onto the surface. The baffle formed by the stainless steel support collar prevents captured floatable debris from exiting through the overflow holes.
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