C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
362/12
C02F 3/00 (2006.01) C02F 3/02 (2006.01) C02F 3/04 (2006.01) C02F 3/28 (2006.01) C02F 3/30 (2006.01) C02F 3/34 (2006.01)
Patent
CA 1056963
ABSTRACT OF THE DISCLOSURE There are disclosed a process for removing impurities dissolved in water, and more particularly organic nitrogen compounds,nitrates, nitrites and ammonium compounds utilising biological processes, comprising the steps of passing in the presence of a normal atmosphere the water to be purified in downwardly flowing manner through a system which ensures ammonification and nitrification, then passing said water in the presence of a nitrogen atmosphere through a system which physically expels oxygen, then passing said water once again in the presence of a nitrogen atmosphere through a system which biologically reduces nitrates, and finally after draining off the gases formed from the impurities, removing purified water and an apparatus for carrying out said process.
266556
Baensch Ulrich
Benedetto-Castro Luis-Alberto
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