Abstract: Disclosed is a process for treating wastewaters including at least one step of aerobic biological treatment of the wastewaters in a biological reactor (3), as well as a step of ozonation during which ozone is injected into one or more circuits (1, 6) arranged to transport a respective fluid into the biological reactor (3). Also disclosed is a device relating thereto.

Abstract: Process and device for dispersing gas in a downward flow of liquid, according to which the liquid is distributed along at least one jet (A) directed downwards, preferably along a plurality of jets; gas is distributed radially (F) towards the liquid jet or jets in order to be entrained by the liquid; and the liquid-gas mixture is channeled into a downflow vertical tube (P).

Abstract: Disclosed is a method and a facility for treating Produced Water stream from a production well of an oil and gas field, the method and facility including: obtaining a first stream by directing the Produced Water stream to a system of separation by physical way; oxidizing the first stream by introducing in the stream an oxidant by contacting the Produced Water stream with an oxidant; and directing the oxidized stream to an aerobic bioreactor, to achieve a biological treatment.

Abstract: Disclosed is a process for treating wastewaters including at least one step of aerobic biological treatment of the wastewaters in a biological reactor (3), as well as a step of ozonation during which ozone is injected into one or more circuits (1, 6) arranged to transport a respective fluid into the biological reactor (3). Also disclosed is a device relating thereto.

Abstract: Process and device for dispersing gas in a downward flow of liquid, according to which the liquid is distributed along at least one jet (A) directed downwards, preferably along a plurality of jets; gas is distributed radially (F) towards the liquid jet or jets in order to be entrained by the liquid; and the liquid-gas mixture is channelled into a downflow vertical tube (P).

Abstract: The invention relates to a biological wastewater purification method using a reactor including a first compartment (2) and a second compartment (4), the lower parts of which are communicated with one another. The water to be treated enters the first compartment, while the second compartment houses aerobic granular sludge at atmospheric pressure. Oxygen-laden gas is injected into the lower part of the second compartment. The granular sludge forms a bed (5) in the second compartment (4) and the reactor operates in a sequential, discontinuous manner in a cycle comprising two phases, namely: a first anaerobic phase during which the first compartment (2) is vacuum-filled with the water to be treated, after which the pressure is abruptly brought to atmospheric pressure in order to discharge a volume of water rapidly into the second compartment (4); and a second aerobic phase during which gas containing oxygen is injected into the second compartment (4).

Abstract: The invention relates to a biological wastewater purification method using a reactor including a first compartment (2) and a second compartment (4), the lower parts of which are communicated with one another. The water to be treated enters the first compartment, while the second compartment houses aerobic granular sludge at atmospheric pressure. Oxygen-laden gas is injected into the lower part of the second compartment. The granular sludge forms a bed (5) in the second compartment (4) and the reactor operates in a sequential, discontinuous manner in a cycle comprising two phases, namely: a first anaerobic phase during which the first compartment (2) is vacuum-filled with the water to be treated, after which the pressure is abruptly brought to atmospheric pressure in order to discharge a volume of water rapidly into the second compartment (4); and a second aerobic phase during which gas containing oxygen is injected into the second compartment (4).

Abstract: The invention concerns a method for purifying aqueous effluents, in particular polluted water, by catalytic oxidation using a three-phase reactor comprising two communicating chambers. The invention is characterised in that it consists in: maintaining the catalyst suspended and continuously circulating it between the two chambers of said reactor, by entrainment under the effect of carrier gas injected into one of said chamber, and in oxidizing the pollutants in contact with the in the other chamber, by injecting a reactive oxidizing gas in said other chamber.

Abstract: A process of catalytic ozonization with molecular ozone or with a gas containing ozone, for the purification of polluted waters, comprising the step of activating the ozone with a catalyst consisting at least of cobalt atoms, in order to achieve the advanced oxidation of the organic pollutants contained in the waters by converting the Total Organic Carbon of the waters into carbon dioxide.