Filtration Mode

• Influent wastewater/wet weather flow enters the filter by gravity
• Stationary cloth media disks are completely submerged
• Solids deposit on the outside of the cloth media forming a mat as filtrate flows through the media
• Tank liquid level rises as headloss builds due to the collection of solids
• Filtrate is collected in the hollow center tube and discharged over an effluent weir
• Heavier solids settle to the specifically designed hoppered tank bottom

Backwash Mode

• Solids are backwashed at a predetermined liquid level or time
• Backwash shoes directly contact the cloth media and solids are removed by vacuum pressure using a backwash pump
• Disks rotate slowly and two disks are backwashed at a time (unless a single disk is utilized)
• Filtration is not interrupted
• Backwash water is directed to waste handling facilities (thickening, digester, etc.)

Solids Wasting Mode

• Heavier solids in the collection hopper are removed on an intermittent basis
• Backwash/Solids Pump provides suction to the solids collection manifold for wasting of settled solids
• Solids are pumped back to the waste handling facilities (thickening, digesters, etc.)

Floatable Wasting Mode

• Floatable scum is allowed to collect on the water surface
• After a preset number of backwashes, the water level is allowed to rise above the preset high level
• As the water level increases, floating scum is removed by flowing over the scum removal weir
• Scum wasting water is directed to the plant’s waste handling facility