Orege

Orege, Societe a Responsabilite Limitee

Pascal Gendrot

Patrice Capeau

Michel Lopez

The invention relates to a method and a device for anaerobic digestion from an organic liquid sludge (), comprising, in a known manner, a step of hydrolysis/acidogenesis of the sludge in a digester (), a step of acetogenesis for producing acetate from the hydrolysed sludge and a step of methanogenesis from the acetates for producing methane. The method comprises an initial step of creating a hydrolysed sludge emulsion () obtained by means of the impact of the sludge with gas () injected into the sludge, then continuously supplying the hydrolysed sludge to a reactor () pressurised in line relative to the digester, before discharging said sludge from the reactor via a member () generating a pressure drop in the hydrolysed sludge, the initial stage being repeated at least once before supplying the, and/or via the, digester.

Method and device for anaerobic digestion

The invention relates to a method and a device for continuously or semi-continuously treating/dehydrating organic sludge (}, wherein a three-phase emulsion of air, solid matter and water is produced by injecting air () into the sludge, introducing a flocculant (, F) into said emulsion in order to create a floc () and then degassing said floc at atmospheric pressure. The floc is degassed by soft impact of the floc on itself or on an energy absorbing shutter (, C), braking the floc, and the floc matured in this way is recovered in a filtration and/or decanting device ().

Treatment method and device for dehydration of organic sludges

The invention relates to a method and device for clarifying water by means treatment of the colloidal structures contained in a liquid and/or a sludge supplied in a continuous flow at a flow rate of Q=V/hour. The flow is sprayed into a chamber under overpressure conditions in relation to atmospheric pressure, said chamber having a volume v&#x3c;V/20, and air being injected simultaneously therein at a flow rate d.

Water clarification method and device

Treating and conditioning liquid sludge and a solidified sludge cake obtained thereby are disclosed. A first emulsion of sludge is formed in an in-line container fed at a first flow rate Q owing to the impact of the sludge with air injected into the container at a rate Q', where Q&#x2032;&#x3e;5Q, in a first region which has a small volume of less than 0.05 m3. The first emulsion is then transferred into a second region of the container extending over a first length, and is then discharged via a component which generates a head loss in a chamber extending over a second length. A flocculant is injected in order to obtain a second coagulated emulsion, which is at least partially degasified. The matter in suspension in the second emulsion obtained in this way is then filtered or decanted.

Method and device for treating liquid sludge and filter cakes obtained by said method

A method and a device for the continuous purification of a domestic or industrial water stream. After passing through a biological reactor to obtain a sludge of between 4 and 12 g/l of Dry Solids, the method involves feeding a series of chambers separated by restrictions at a flow rate q, injecting air into a second chamber at a flow rate Q&#x3e;q, in order to obtain an emulsion, injecting a flocculant into a third chamber, and recovering the degassed emulsion in a drain pan. Flocculated and aerated sludge floats on top, such that the remaining liquid centrate has a Dry Solids content less than 100 mg/l and has a positive redox potential &#x3e;50 mV and a value greater than 100 mV relative to the redox potential of the sludge at the inlet of the chambers, and is reinjected upstream from or into the biological reactor.

Method and device for purifying domestic or industrial water

The continuous treatment of a flow of organic liquid sludge is disclosed. Following the optional addition of granular mineral matter to the flow, the sludge is injected at a rate q into a column of air which is at overpressure relative to atmospheric pressure. The air column is circulating at a rate Q&#x3e;5q in a chamber extending over a specific length in order to create a fluidized bed, in which the sludge is aerolized, between air supply piping upstream of the sludge injection and an outlet reservoir downstream of the fluidized bed, the reservoir being substantially at atmospheric pressure. A flocculant is introduced continuously downstream of the chamber into the fluidized bed in order to aggregate the organic matter before the solid part obtained in this way is separated from the liquid part, the resulting solid part thus being deodorized.

Method of deodorizing sludge and device for performing said method

The invention relates to a method and device for clarifying water by means treatment of the colloidal structures contained in a liquid and/or a sludge supplied in a continuous flow at a flow rate of Q=V/hour. The flow is sprayed into a chamber () under overpressure conditions in relation to atmospheric pressure, said chamber () having a volume v&#x3c;V/20, and air () being injected simultaneously therein at a flow rate d.

Treating an organic effluent is disclosed. The effluent is fed in a continuous flow at a rate q via a first chamber maintained at a first pressure and/or directly through a first narrowing to a second chamber or container maintained at a second medium pressure by the injection of air into the second chamber at a rate Q in order to obtain an emulsion in the second chamber. A head loss is generated in the emulsion optionally modified by a second and/or third narrowing or a feed valve for a third chamber maintained at a third pressure in the region immediately downstream of the second or third narrowing and/or valve. A flocculant is injected into the region of the third chamber. The emulsion at atmospheric pressure then being degasified and the emulsion thus degasified being recovered in a filtration or decanting device.

Method and device for treating an organic effluent

The invention relates to a method for separating the liquid part from the suspended matter in a sludge supplied in a continuous flow at a flow rate of Q=V/hour. The flow is divided into at least two partial flows which are sprayed on top of one another into a sealed chamber of volume v&#x3c;V/20, simultaneously injecting air therein at a flow rate d, said chamber being kept under overpressure conditions. The suspended matter of the thus treated flow is then left to decant in a collection container, with the cake or solid part falling to the bottom and separating from the liquid part which is continuously discharged.

Method for separating liquid from suspended matter in a sludge and device for same

The invention relates to a method and a device for purifying liquid effluents, in which water is separated from substances by performing, in a single vertical enclosure (), a vertical bubbling in the effluents fed at a flow rate d. The enclosure has a free surface and includes at least two compartments () communicating together for enabling a circulation between the compartments successively from the top to the bottom and from the bottom to the top between the lower portion thereof and a medium level at a flow rate D at least three times higher than the flow rate d. The supernatant phase is continuously discharged and a hydraulic or gaseous chemical oxidation of said effluents is simultaneously carried out in the same enclosure, the chemical oxidation rate and the bubble flow rate and size being selected in order to progressively obtain a separation of the solid/liquid and liquid/liquid phases at the surface of the enclosure for obtaining a COD below a predetermined threshold.

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Jouy en Josas, France

Pascal Gendrot