C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 3/00 (2006.01) C02F 3/08 (2006.01) C02F 3/12 (2006.01) C02F 3/22 (2006.01)
Patent
CA 2164932
In the biological purification of sewage water or drinking water,it is known to purify the water in a filter bed of granular filter medium, wherein the filter medium is transported from the bottom of the bed to its upper side with the aid of air, so as to obtain a continuously working filter. It is suggested in accordance with the invention that the amount of filter medium to be transported is divided into two or more parts which are transported in parallel, so as to prevent the flow conditions in the transport tube having a negative effect on the reactivity of the filter bed by decreasing the bacteria strain.
Dans la purification biologique des eaux d'égout ou de l'eau potable, on purifie généralement l'eau dans un lit filtrant constitué d'un milieu filtrant granulaire. Ce milieu filtrant est transporté depuis le fond du lit jusqu'à sa surface supérieure à l'aide d'air de façon à obtenir un filtre à action continue. Selon l'invention, on suggère que la quantité du milieu filtrant à transporter soit divisée en deux parties ou davantage qui sont transportées en parallèle de façon à prévenir certaines conditions d'écoulement dans le tube de transport ayant un effet négatif sur la réactivité du lit filtrant, qui se traduit par la diminution des souches bactériennes.
Hagrot Magnus
Jonsson Kurt
Lenvik Lennart
Oskarsson Jonas
Nordic Water Products Ab
Sim & Mcburney
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