Method for wastewater treatment in fluidized bed biological reac

Details Method for wastewater treatment in fluidized bed biological reac Method for wastewater treatment in fluidized bed biological reac

1980-08-12

1982-03-30

Wyse, Thomas G.

Liquid purification or separation

Processes

Treatment by living organism

210618, 210903, C02F 306

Patent

active

043222960

ABSTRACT:
Wastewater is subjected to biological reaction in a bed containing the biological reaction bacteria on a particulate carrier wherein the lower portion of the bed is fluidized while the upper portion is maintained as a fixed bed. When the fixed bed portion becomes clogged with cellular material, the entire bed is fluidized and wash water is passed through the bed to remove excess cellular material. The method is applicable to advanced wastewater treatment, both secondary treatment for BOD removal, and tertiary treatment for nitrification and/or denitrification. The method is particularly advantageous for treatment of wastewater supplied at varying flow rates.

REFERENCES:
patent: 3347052 (1968-03-01), Fan et al.
patent: 3846289 (1974-11-01), Jeris et al.
patent: 4009098 (1974-11-01), Jeris
patent: 4009099 (1977-02-01), Jeris
patent: 4086162 (1978-04-01), Benzaria
patent: 4157959 (1979-06-01), Wen et al.
patent: 4253947 (1981-03-01), Fan et al.

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