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

Claim 3:
4. The wastewater treatment system of claim 3, wherein
bacteria in the first process zone are effective to produce granular biomass as said second type of sludge as well as flocculent biomass as said first type of sludge, the first process zone being anaerobic or anoxic to encourage formation of granular biomass,
the plurality of process zones including at least a second process zone positioned to receive activated sludge in continuous flow from the first process zone, the activated sludge including granular biomass and flocculent biomass,
one of the plurality of process zones being an aerobic zone,
the biomass separator being effective to separate out granular biomass from the activated sludge, so that the separator produces the first effluent as predominantly flocculent biomass and the second effluent enriched in granular biomass, and
a granular recycle line configured to carry a portion of said second effluent from the separator back to the first process zone.