Patent ID: 11919787
Assignee: OVIVO INC.
Field: Environmental technology (Chemistry)
Classification: CPC C  Y | IPC C

Claim 0:
1. A wastewater treatment system for biological treatment of wastewater including organic sewage, the system including a liquid process configuration for removal of at least nitrogen and for concentrating biomass, in a continuous flow process, with the wastewater and activated sludge moving through the liquid process configuration, comprising:
a plurality of process zones, including a first process zone configured to receive the influent wastewater in continuous flow and to mix the influent wastewater with biomass to produce said activated sludge, which includes a first type of sludge and a second, faster settling sludge that settles faster than the first type of sludge,
a biomass separator downstream of the process zones, positioned to receive activated sludge with the first and second types of sludge, the separator being configured and effective to separate out the second type of sludge from the mixed liquor to produce a first effluent with predominantly the first type of sludge and a second effluent enriched in the second type of sludge, and
a dilution line operable to deliver clarified liquid from the liquid process configuration to join the activated sludge entering the separator for dilution of the flow into the separator to enhance separation.