L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des

Paul Boulenger

Nicole Angelier

Jean-Pierre Torres

The present invention relates to a method of and an installation for the treatment of a material oxidizable by a biochemical process, in which at least one oxygenation process is applied to a mixture comprising water, the oxidizable material and a biomass, this oxygenation process comprising at least the three following operations:

Method of treatment of an oxidizable material by a biochemical process

An improved process for the purification of effluent is disclosed in which oxygenated effluent is introduced into a treatment zone in which a part of the total amount of biologically activated sludge used in the process is fixed on immersed bacterial beds or discs which are mobile and a further part of said sludge is in suspension in effluent undergoing treatment.

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Grenoble, France

Paul Boulenger