Process for biologically purifying waste waters

Details Process for biologically purifying waste waters Process for biologically purifying waste waters

1992-04-01

1994-02-22

Wyse, Thomas

Liquid purification or separation

Processes

Treatment by living organism

210624, 210746, 210903, C02F 312

Patent

active

052884066

ABSTRACT:
A continuous process by which waste water containing low to high concentrations of organic constituents and total nitrogen is biologically purified to such an extent that the organic constituents are minimized, the content of total nitrogen is completely nitrified, if it exceeds the assimilation demand, and the nitrate formed is reduced by aerating the waste water or exposing it to oxygen while not exceeding a preselected redox potential. In the subject process, the expenditure on the oxygen introduction and the expenditure on the denitrification are minimized. Further, the amount of excess sludge produced is extremely small.

REFERENCES:
patent: 3725258 (1973-04-01), Spector et al.
patent: 4277342 (1981-07-01), Hayes et al.
patent: 4548715 (1985-10-01), Stein
patent: 4659471 (1987-04-01), Molin et al.
patent: 4731185 (1988-03-01), Chen et al.
patent: 4810386 (1989-03-01), Copa et al.
patent: 4849108 (1989-07-01), de Wilde et al.
patent: 4859341 (1989-08-01), Schreiber
"Conversion and Elimination of Nitrogen in Wastewater", in Korrespondenz Abwasser, vol. 34, No. 1, pp. 77-85 (1987).

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