Abstract: An improved fixed film bioreactor for the purification of water is disclosed. The bioreactor may include an eductor disposed at least partially within a convergence region of a tank. The bioreactor may also include a lift conduit for receiving pressurized water and media components from the eductor. A media cleaning pathway may include the lift conduit and the eductor. The water purification process of the bioreactor may continue in an uninterrupted manner during a media cleaning cycle, which utilizes the media cleaning pathway. Associated methods are also disclosed.

Abstract: A media clarifier may have a passageway, an inlet, an outlet above the inlet, a screen, and a media bed with both compressible and incompressible media. The screen may span the passageway. The media bed may be adjacent to the screen when the media clarifier is in an operational state. Particulate matter is removed from a water stream as it passes through the media bed.

Abstract: A combination biological contactor and self-backwashing filter system for water treatment is disclosed. The system may include a treatment vessel defining an upper chamber and a lower chamber. A biological contactor may be disposed within the upper chamber, and a filter may be disposed in the lower chamber. A contactor outlet conduit and inlet manifold may be used to transfer water from the biological contactor to filter cells within the filter.