Carbon filtration process and apparatus for removing PCB's...

Details Carbon filtration process and apparatus for removing PCB's... Carbon filtration process and apparatus for removing PCB's...

2007-01-02

2007-01-02

Barry, Chester T. (Department: 1724)

Liquid purification or separation

Processes

Treatment by living organism

C210S694000, C210S670000, C210S678000, C210S748080, C210S265000, C210S275000

Reexamination Certificate

active

11045840

ABSTRACT:
Process and apparatus for treating wastewater from a sewer system including the steps of: (A) removing solids contained in the influent to create solids-depleted preliminary effluent (PrE) and to protect downstream systems from premature failure due to wear from solid particles; (B) removing suspended solids from the PrE to produce a suspended solids-depleted primary effluent (PE); (C) treating the PE biologically by exposing it to bacteria-supporting media that removes soluble organic material, thereby creating trickling filter effluent (TFE); (D) separating the bacterial organisms by settling to create a secondary effluent (SE); (E) subjecting the SE to tertiary treatment including granular activated carbon pressure filters to remove PCB's and other compounds and create a carbon filter effluent; (F) disinfecting the CFE to create a final effluent (FE); and (G) discharging the FE to a receiving environment, separately settling and disposing the backwash solids in a backwash clarifier.

REFERENCES:
patent: 4172781 (1979-10-01), Walk et al.
patent: 4292176 (1981-09-01), Grutsch et al.
patent: 4568463 (1986-02-01), Klein
patent: 5298172 (1994-03-01), Smith
patent: 6503404 (2003-01-01), Ghalib
patent: 6921489 (2005-07-01), Albertson
United States Environmental Protection Agency,Wastewater Technology Fact Sheet, Sep. 2000, EPA 832-F-00-017.

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