Method for biologically removing nitrogen from wastewater

Details Method for biologically removing nitrogen from wastewater Method for biologically removing nitrogen from wastewater

1991-09-09

1993-05-25

Wyse, Thomas

Liquid purification or separation

Processes

Treatment by living organism

210610, 210621, 210629, 210903, 210906, C02F 330

Patent

active

052136817

ABSTRACT:
The present invention relates to a system and method for biologically removing nitrogen from wastewater. Both the system and method entails forming a mixed liquor and transferring the mixed liquor to a series of nitrogen removal stages. Each nitrogen removal stage includes both anoxic and aerobic treatment zones. Mixed liquor is recycled back and forth between the anoxic and aerobic treatment zone of each stage. Because of this basic flow scheme, the process gives rise to a high reactor rate and highly efficient nitrogen removal process.

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patent: 4867883 (1989-09-01), Daigger et al.
patent: 4948510 (1990-08-01), Todd et al.
patent: 5022993 (1991-06-01), Williamson
patent: 5137636 (1992-08-01), Bundgaard
patent: 5160043 (1992-11-01), Kos

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