Process for the biological purification of waste waters

Details Process for the biological purification of waste waters Process for the biological purification of waste waters

1988-07-18

1990-04-10

Fisher, Richard V.

Liquid purification or separation

Processes

Treatment by living organism

210615, 210617, 210622, 210623, C02F 330

Patent

active

049158414

ABSTRACT:
Process for the psychrophilic biological purification of waste waters having medium-low concentrations of polluting substances. The process comprises a first anaerobic treatment step with an expanded mud bed of U.A.S.B. type at a low flow rate, a second treatment step comprising a fluid-bed treatment on a fine support at a high flow rate, and a final treatment step comprising anaerobic treatment for the nitrification and oxydation of the various substances reduced in the previous treatments. The flow is then recycled to the upstream steps for the removal of possible nutrients, such as nitrogen and phosphorus.

REFERENCES:
patent: 936464 (1909-10-01), Lucas
patent: 978889 (1910-12-01), Imhoff
patent: 3112261 (1963-11-01), Porter et al.
patent: 3293174 (1966-12-01), Robjohns
patent: 4344848 (1982-08-01), Hukulinen
patent: 4366059 (1982-12-01), Witt et al.
patent: 4627917 (1986-12-01), Morper
patent: 4743376 (1988-05-01), Elmuleh et al.

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