Patent ID: 8323493

Claim:
A filter assembly for wastewater comprising: (a) a housing defining a filtering chamber having an opening for receiving filtering material, a lid operative for closing the opening, an inlet proximate the opening and an outlet distal the inlet; (b) a filter basket having an imperforate portion proximate the open end and a perforate portion downstream of the imperforate portion, the basket removably received in the chamber through the opening in the filtering chamber; (c) a filter cartridge comprising a flexible porous sleeve filled with particulate polymer material and closed at its ends thereof, the cartridge being disposed in the basket and extending into the imperforate portion and into the perforate portion; (d) a bag filter disposed about the basket and removable with the basket, wherein wastewater received through the inlet is caused to flow sequentially through the cartridge, outwardly through the perforate portion of the basket and through the bag filter to the outlet.