Patent ID: 11878923
Assignee: VEOLIA WATER SOLUTIONS & TECHNOLOGIES SUPPORT
Field: Environmental technology (Chemistry)
Classification: CPC C  Y | IPC C

Claim 0:
1. A system for biologically treating wastewater comprising:
a tank comprising a point of entry for the wastewater to be treated and an exit point for treated wastewater;
a shaft disposed in the tank;
a rotating drum having a wall with one or more openings formed therein and supported on the shaft and configured to be partially submerged in the wastewater in the tank where less than one-half of the drum's internal volume contains the wastewater;
a drive for rotatively driving the drum;
media configured to support a biofilm disposed in the drum and retained in the drum as the drum is rotatively driven;
the media occupying a volume of from 30% to 80% of the internal volume of the rotating drum;
at least one hollow tube disposed in the rotating drum and secured to the wall of the rotating drum, the at least one hollow tube extending generally parallel to the shaft;
the at least one hollow tube includes one or more orifices formed in a section of the tube; and
wherein the drum and the at least one hollow tube are configured to alternatively fill the at least one hollow tube with air and wastewater in response to the drum being rotatively driven.