A PROCESS OF CATALYTIC OZONIZATION FOR THE PURIFICATION OF POLLUTED WATERS

The invention relates to a method for avoiding, or reducing the clogging of filtration membranes, in particular, as used in effluent treatment such as of aqueous wastes, characterised in comprising the addition, to the effluent for filtration, of a natural organic adsorbent for trapping the molecules and particles ...

A method for the biological treatment of effluents contaminated with impurities municipal or industrial origen, characterized in that it employs a single aeration tank (1) with high mass loading in which the raw or mechanically pre-treated effluent is mixed without prior setting, with a free microbial culture of the...

Coagulation/flocculation apparatus for the treatment of a hydraulic flow of any type of liquid upstream of a physical separation element in particular upstream of a flotation unit or of a filtration unit in particular a membrane filtration unit which apparatus comprises at least one coagulator with injection of coag...

The invention relates to a method for washing a filter (F) having at least two layers of filtering media (4 5) for raw water containing components having a tendency to form cakes (M) in particular for seawater the layers of filtering media being supported by a base (6) comprising pass through openings and provide...

THE INVENTION RELATES TO A METHOD FOR DRYING PASTY MATERIALS, IN PARTICULAR SLUDGE FROM WASTEWATER TREATMENT PLANTS, INCLUDING A FIRST INDIRECT DRYING STAGE (1) SUPPLIED WITH A HEAT-TRANSFER FLUID, WHICH OUTPUTS (1A, 1B) PRE-DRIED SLUDGE AND WATER VAPOUR; A STEP (6) OF FORMING SLUDGE AT THE OUTLET OF THE FIRST STAGE...

The invention concerns a device comprising a rotary shaft (2) supported above a layer (C) of material, transversely to the translation direction (A) of the material, and means for turning (3) the material extending at least partly radially relative to the shaft (2) and rotated by said shaft to penetrate into the lay...

The invention concerns a water clarifying device comprising a flotation zone (c), a membrane-based filtering zone (e) and extracting means (d), the flotation zone (c) and the membrane-based filtering zone (e) having a common partition wall (P), the common partition wall (P) including in its lower part an opening (o)...

The invention relates to a method for clarification by flotation of water loaded with material in suspension, characterised in that the clarification treatment is carried out in two successive stages in a single plant. The method comprises a static flocculation step with descending current, integrated with a primary...

The inventive nozzle, comprises, a first releasing stage (1) for producing a pre-release by absorbing from 5 to 20 % of available pressure, a second releasing stage (2) wherein a substantial release is carried out and the pressurised water passes from .a saturation pressure to an output nozzle pressure, an intermedi...

The invention relates to a method for treating fluids, in particular waste waters involving coagulalion/flocculalion, clarification by filtration or flotation stages and a stage of filtration through micro-, ullra. and nanorncmbranes or of llyperfiltration. The inventive method consists in injecting two limes severa...

A method for the treatment and filtration of fluids, i.e. liquid effluents such as raw water containing organic pollutants ID a solution, using gravity separation means (10) such as a decantation and flotation means, and membrane separation means (13) in a finishing stage, wherein a first pulverulent reagent (I) is ...

A method for treating waste water by a membrane bioreactor comprising the steps: a) treating waste water in a bioreactor to produce excess biological sludge and treated water components; b) extracting the biological sludge from the bioreactor; c) causing contact between the biological sludge and dewate...

Method for packaging liquid muds resulting from the treatment of urban and/or industrial waste water according to which the mud is subjected to a mechanical dehydration step followed by a thermal drying step. Ferric chloride and/or quicklime or slaked lime is injected into the mud after the dehydration step and befo...

The invention relates to a method for the floatation-clarification of difficult water, in particular heavily polluted surface water, urban or industrial wastewater, rainwater or any type of water that floats with difficulty, particularly wate r which contains a high percentage of mineral matter or requires the injec...

The invention relates to a silo for storing dried bulk products containing organic materials, in particular for storing dried sludge from residual water treatment plants, said products being subject to self-heating phenomena, wherein said silo includes an outer shell (1) having an upper portion and a lower portion, ...

The invention relates to a water filtration device that comprises a floor (2) above which are provided a first layer (5) of a first medium (A) containing high density grains with a mean diameter Da, and a second layer (6) of a second medium (B) containing grains having a mean diameter Db and a density lower than tha...

The invention aims at enabling, in a catalytic decatenation apparatus, inert particles coated with calcium carbonate to be constantly and systematically extracted from the reactor, with no risk of clogging the discharge pipes. Therefor, said pipes (7"a, 7"b) have an inside diameter ranging between 40 and 60 mm and t...

Process for the treatment of waste water loaded with sulphides and with ammonium, in particular of waste water of urban or industrial origin or materials fed back from digestion, condensates or leachates. The waste water first undergoes a free-culture anoxic treatment (1) via the biological process, according to whi...

The invention relates to a water purification installation comprising: a coagulation area (1); a flocculation area (3); an area (5) for mixing, in an upflow, the flocculated water with pressurised water which is delivered by a microbubble-generating pressurisation-pressure reduction system (8); and a flotation area ...

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Apparatus for solid-liquid gravity separation, particularly of sludge from purification stations comprising a planar, fixed thickening or draining grate (2), to which the sludge is continuously supplied, said sludge being permanently scraped by a scraping system having flexible blades (4), wherein said grate is cons...

Process for the physico-chemical treatment of effluent, especially of surface water intended for consumption, comprising the successive steps of coagu-lation (A), flocculation (B) and settling (C), a contac-ting mass being introduced into the water coming from the coagulation step, and therefore during the flocculat...

Method for disinfecting a filtration works (F) for the pretreatment of salt water, particularly seawater, upstream of a water desalination unit (1) using a reverse osmosis membrane, whereby an operation of disinfecting the filtration works is carried out periodically by adding a bactericidal agent to the water that ...

The invention relates to a method for drying slurry like materials, in particular sludge from wastewater treatment planing including two drying stages, namely: a first indirect drying stage (2) supplied with hot fluid, which receives sludge having an entry dryness Se, and output sludge having an intermediate...

The invention relates to a method of cleaning membrane filters comprising hollow fibres and an inner skin. The inventive method comprises the following steps consisting in: emptying the concentrate compartment in order to release the liquid to be filtered contained therein and the suspended matter, and, subsequently...

The invention relates to a rapid flotation device in particular using dissolved air for treating water laden with suspended matter (MES). The device comprises a mixing area (B) separated from a flotation area (C) by a wall (n) above which the liquid to be treated passes from the mixing area. The bottom portion of th...

An incineration furnace (1) for pasty products or sludge with a bed of granular material fluidised by injecting a gas stream the furnace comprising at least two injection nozzles (6 7) for injecting products into the bed supplied respectively by a pipe provided with a valve (8 9) and linked to the discharge of a sam...

The invention relates to a method for controlling oxygen supply in a tank (2) for biologically treating wastewater by alternating aeration including consecutive cycles, wherein each cycle comprises a first aeration phase and a second anoxic phase for reducing nitrites and nitrates formed during the precedmg aeration...

The invention relates to a static decanter (D) for prethickening liquid sludge in a water treatment plant, in particular wastewater, comprising an inclined bottom (8), the decanter being provided with a liquid sludge supply pump (13), a device for injecting a polymer in the liquid sludge, an overspill discharge (23)...