Process and apparatus for removal of nitrate from surface and gr

Details Process and apparatus for removal of nitrate from surface and gr Process and apparatus for removal of nitrate from surface and gr

1986-05-30

1988-07-12

Castel, Benoit

Liquid purification or separation

Processes

Treatment by living organism

210605, 210611, 210 93, 210150, 210202, 210247, 2102571, 210261, 210903, 435182, C02F 330, C02F 334

Patent

active

047568313

ABSTRACT:
Process for recovering nitrate from surface and ground water, in particular drinking water, by means of biological denitrification, in which the nitrates contained in the water are reduced to gaseous nitrogen in a reactor by means of a biocatalyst having immobilized cells trapped in a gel or polymer. The "micrococcus denitrificans" that is preferably used requires for its metabolism added hydrogen and carbon that is present in the water in the form of dissolved carbon dioxide. Using a biocatalyst of immobilized cells and of the bacterial strain used, expensive after-purification is unnecessary because of increased bacterial count in the pure water outlet, and no undesirable by-products are formed.

REFERENCES:
patent: 4469599 (1984-09-01), Gros et al.
patent: 4576718 (1986-03-01), Reischl et al.
Hollo et al.; "Denitrification and Removal of Heavy Metals from Waste Water by Immmobilized Microorganisms"; found in (Mar. 1979).

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