Liquid purification or separation – Processes – Treatment by living organism
Patent
1991-09-26
1993-03-02
Wyse, Thomas
Liquid purification or separation
Processes
Treatment by living organism
210610, 210631, 210903, C02F 330
Patent
active
051906554
ABSTRACT:
The present invention relates to a process at the purification of water, in particular sewage water, comprising a nitrification process and a denitrification process during simultaneous decomposition of a pre-precipitated sludge of sewage water. The invention is characterized in that decomposed sludge or solutions of sludge of a chemical pre-precipitation of sewage water is added as a source of carbon at the denitrification step.
REFERENCES:
patent: 3617540 (1971-11-01), Bishop et al.
patent: 3846293 (1974-11-01), Campbell
patent: 4240904 (1980-12-01), Dassen
patent: 4488967 (1984-12-01), Block et al.
patent: 4787978 (1988-11-01), Nicol
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