Storm drain assembly with disposable filter cartridge

DETAILED DESCRIPTION The present invention is a disposable filter cartridge for a storm drain and the filter system that uses the improved filter cartridge.
The filter cartridge has a pillow structure, wherein a water permeable scrim bag surrounds loose oil absorbing fibers.
The oil absorbing fibers are preferably fabricated from melt blown polypropylene.
The filter cartridge is placed in a filter cage that directs water flow through the filter cartridge yet prevents debris from reaching the filter cartridge.
The filter cage is suspended below the grate of the storm drain by suspension elements such as chains or rods.
The top of each of the suspension elements terminate at an attachment element that engages the grate of the storm grate.
As a result, the filter cage and filter cartridge are suspended directly from the storm drain grate.
By suspending the filter cartridge directly from the grate of a storm drain, the filter cartridge is positioned directly in line with the flow of water entering the storm drain.
Furthermore, by suspending the filter cartridge from the grate, the designed orientation of the grate is not disturbed and the grate remains at or below street level.