The invention relates to a facility for filtering saltwater including a perforated slab (6), defining: an upper chamber (10) housing a filtering material resting on said slab (6), and a lower chamber (11) for collecting the filtered water, characterised in that said slab (11) is made of fibrous concrete, optionally prestressed, said concrete having: a compressive strength of 50 to 250 MPa; a bending strength of 5 to 60 MPa; and a Young's modulus of 40 to 60 GPa.
B01D 24/40 - Feed or discharge devices for feeding
B01D 24/42 - Feed or discharge devices for discharging filtrate
2.
DEVICE FOR COATING WITH A FLOCCULATING POLYMER MATERIAL IN THE LIQUID STATE OF BALLAST PARTICLES USED FOR THE TREATMENT OF WATER BY BALLASTED FLOCCULATION, AND CORRESPONDING FACILITY
The invention relates to a device for coating with a flocculating polymer material in the liquid state of ballast particles used for the treatment of water by ballasted flocculation, said device comprising: a chamber; means for introducing said particles into said chamber; means for injecting said polymer in the liquid state into said chamber; means for bringing said particles into contact with said polymer in the liquid state; and means for discharging particles coated with said polymer, these being located on the periphery of said chamber.
B01J 2/00 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic
C02F 1/52 - Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
Ultra rapid water treatment process and corresponding installation. The invention relates to an ultra rapid process for treating water within a treatment installation, said process comprising: - a step of injecting at least one adsorbent charge into said water; a step of mixing said water and said at least one adsorbent charge within an agitated zone (21). According to the invention, such a process comprises: - a first step of filtration of the mixture obtained in said mixing step at a rate between 50 and 200 m/h within at least one filtration unit (24) comprising a plurality of flexible fibres; - a step of recirculating said at least one adsorbent charge upstream of said agitated zone (21); the adsorbent charge concentration of the mixture of said water and of said at least one adsorbent charge being between 0.05 and 10 grams of adsorbent charge per litre of water.
Biologically treated wastewater is directed as mixed liquor from the treatment tank to a bottom portion of a downstream filtration tank having at least one submerged membrane module that extends across substantially the entire cross sectional area of the filtration tank Mixed liquor is directed from the bottom of the filtration tank upwardly into the membrane module such that substantially all of the mixed liquor received in the bottom of the filtration tank flows through the membrane module, producing a permeate stream The remaining mixed liquor from the membrane module is recirculated to the treatment tank Once the mixed liquor in the filtration tank makes one pass through the membrane module the mixed liquor is recycled back to the treatment tank and generally not permitted to be recycled back through the membrane module without first returning to the treatment tank.
B01D 61/00 - Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltrationApparatus, accessories or auxiliary operations specially adapted therefor
C02F 1/44 - Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
The invention relates to a process that includes a pretreatment for obtaining water of very high quality as feed stock for a subsequent treatment. According to the invention, said pretreatment includes at least: a first filtration step on granular filters; a step of measuring the value of at least one item of information representative of the quality of said water at the outlet of each of said granular filters; a step of comparing said measured value with a predetermined threshold value; and a second filtration step, for filtering said water coming from said granular filters (said second step being implemented when said measured value is above or below said threshold value).
The invention relates to a method for treating water charged with colloidal impurities, either dissolved or suspended, in a treatment plant, wherein said method comprises: the step of contacting said water, in an advanced oxidation area (10), with hydrogen peroxide in the presence of at least one transition-metal salt; a flocculation step that comprises contacting said water, in a flocculation area (12), with at least one flocculation additive and with at least one ballast comprising at least one non-soluble granular material denser than water and used as a biomass carrier; the step of feeding the water and floc mixture thus obtained into a settling area (14); the step of separating the treated water at the upper portion of said settling area (14) from a mixture of sludge and ballast resulting from the settling of said flocs; the step of extracting the sludge and ballast mixture at the lower portion (23) of said settling area (24); and the step of recycling at least a portion of the sludge into said advanced oxidation area (10).
The invention relates to a flotation water treatment plant comprising at least: an inlet zone (31) for the water to be treated, which is coagulated and flocculated beforehand; a mixing zone (32), for mixing pressurized and then depressurized water with said water to be treated; a flotation zone (35) separated from said mixing zone by a wall; a clarified-water take-up zone (36) provided in the lower part of said flotation zone (35). According to the technique shown here, said mixing zone accommodates (32) at least one spray nozzle (40, 91, 92) for spraying said pressurized water, said spray nozzle (40, 91, 92) lying close to a panel (33), at least part of which has perforations (331), said panel separating said inlet zone (31) from said mixing zone (32).
The technique proposed here relates to a water treatment device comprising raw water inlet means (24), treated water discharge means (17, 28) and an essentially parallelepipedal frame (10) having a bottom and a cover element (11), said frame (10) defining at least: a biological treatment zone (12) accommodating a plurality of biological discs (16); and a filtration zone (13) accommodating at least one drum filter (21), at least one part of which has perforations, and sludge collecting means (33), said biological discs (16) and said drum filter (21) both being mounted essentially on the same axis (X) and having approximately the same outside diameters, the device further including means (22) for conveying a partly biologically purified flow coming from said biological treatment zone (12) within said drum filter (21). According to the technique proposed here, such a device includes means for declogging said perforations of said drum filter (21) which comprise at least means for blowing pressurized air on the periphery of said drum filter (21).
C02F 3/08 - Aerobic processes using moving contact bodies
B01D 33/067 - Construction of the filtering drums, e.g. mounting or sealing arrangements
B01D 33/073 - Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for inward flow filtration
9.
ASSEMBLY OF ULTRAFILTRATION OR MICROFILTRATION MEMBRANE MODULES, AND CORRESPONDING MEMBRANE MODULE, STRUCTURE AND MAINTENANCE METHOD
The technique of the present invention relates to membrane modules for the ultrafiltration or microfiltration of liquids such as water, that include at least one assembly of membrane modules extending essentially in a vertical plane and at least one duct, said modules each including an elongated module body provided at both opposite ends with lower and upper removable end pieces each having at least one tapping for connection to a tapping of said duct. According to this technique, the ducts of this assembly essentially extend in said vertical plane.
The invention relates to a method for processing water in a plant that comprises the steps of contact water, a ballast and a flocculation agent in a flocculation area (1) for forming a flocculate, introducing the mixture thus formed into a deposition area (11), separating the processes water, extracting the sludge and ballast mixture in the lower portion of the deposition area (1) and feeding it to an agitation area for intermediate mixture (19), extracting the sludge and ballast mixture present therein (19) an submitting it to a sludge/ballast separation step (26) by hydro-cycloning, recycling the underflow in the flocculation area (1) extracting a portion of the sludge for the underflow and recirculating the other portion into the intermediate area (19), characterised in that it comprises the step of continuously measuring at least one parameter representative of the impurity concentration in the water before or during its entry in the flocculation area, and the step of using the results of the measurement thus made in order to continuously derive the ballast amount to be used in order to obtain processed water having a predetermined quality.
A method or process for treating wastewater containing high organics, silica, boron, hardness, and suspended and dissolved solids. The method includes degasifying the wastewater for the removal of dissolved gases and thereafter chemically softening the wastewater. After the chemical softening step, the wastewater is directed through a media filter or membrane which removes additional solids and precipitants. Thereafter the wastewater is directed through a sodium ion exchange that further softens the wastewater. The effluent from the ion exchange is directed through a cartridge filter and the effluent from the cartridge filter is directed through one or more reverse osmosis units. At a selected phase of the process, prior to the wastewater reaching the reverse osmosis unit or units, the pH of the wastewater is raised and maintained such that the pH of the wastewater reaching a reverse osmosis unit is at a pH greater than 10.5.
B01D 61/00 - Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltrationApparatus, accessories or auxiliary operations specially adapted therefor
The present invention relates to tappings, wherein the structure comprises a frame (8, 8a) holding a lower manifold (5), an intermediate manifold (6a) and an upper manifold (7) extending essentially horizontally, each manifold comprising tappings and including connection members (10) for connecting at least some tappings of each of said membranes modules (1) to the tappings of said manifolds (5, 6, 7). According to the invention, said connection members (10) includes tapping Tees (12) provided at least on one of said manifolds (6a), and at least a first set of removable tubular members (9, 10, 11, 13) adapted for connecting the membrane modules of a first type (1) to said manifolds.
A water treatment method using a biological reactor to break down the nitrogen-based pollution contained in said water, said reactor comprising a biomass aerated by aeration means, said treatment comprising simultaneous nitrification/denitrification phases, characterized in that said treatment implements two aeration modes: a continuous aeration mode; a sequential aeration mode in which the aeration interruption is triggered when the ammonia concentration reaches a low predetermined threshold while the aeration is activated when the ammonia concentration reaches a high predetermined threshold, the switching from one aeration mode to the other being activated according to the nitrate concentration in said water, said continuous aeration mode being activated when said nitrate concentration reaches a low predetermined threshold, and said sequential aeration mode being activated when said nitrate concentration reaches a high predetermined threshold.
The present invention comprises an apparatus and method for evaporating a liquid to produce a product liquid and a vapor. Liquid is evaporated under the influence of a heat transfer medium in a heat exchanger comprised of a bank of tube plates formed from corrugated sheets. Vapor produced is separated from product liquid by a vapor collector which causes vapor to flow upward and into the collector from a downward-flowing product liquid and vapor stream. Backsplash entrainment into the vapor collector is prevented by an anti-backsplash device disposed between the vapor collector and a reservoir into which product liquid flows.
The invention relates to a water treatment process comprising a first pre-treatment step which produces pretreated water and sludge, wherein said pretreated water undergoes at least one filtration step, at least one of which is a membrane filtration step, and wherein said filtration step produces waste, characterized in that said waste derived from said membrane filtration step undergoes a treatment phase which includes at least one coagulation-flocculation step followed by a second decanting step which produces sludge, wherein said coagulation-flocculation step is preceded by at least one step of adsorption onto said sludge derived from the pretreatment or the decanting step, wherein said adsorption step is aimed at removing the phosphonates contained in said water derived from said membrane filtration step.
The subject of the invention is a biofilm support component intended to be immersed in a biological water purification reactor, comprising a tubular envelope having two end openings that communicate with each other via a channel, said envelope having an inner surface delimiting said channel and an outer surface, said envelope having a series of corrugations that form deformations of said inner surface and of said outer surface, characterized in that said envelope has a length less than or equal to 15 mm and in that the volume of said corrugations that form deformations of said inner surface (131) and the volume of said corrugations that form deformations of said outer surface (132) each represent between 20 % and 29% of the total volume of said envelope.
MEMBRANE REACTOR FOR THE TREATMENT OF LIQUID EFFLUENTS, COMPRISING A MEMBRANE FOR DIFFUSION OF AN OXIDIZING GAS AND A SELECTIVE MEMBRANE, DEFINING A REACTION SPACE BETWEEN SAID MEMBRANES
The subject of the invention is a membrane reactor for the treatment of liquid effluents containing organic pollutants, of the type comprising at least one porous membrane (3) for the diffusion of an oxidizing gas, characterized in that it includes at least one selective membrane (2), (4) of said pollutants, which selective membrane defines, with said porous membrane for the diffusion of an oxidizing gas, a reaction space (31) into which said liquid effluents are injected, said reactor having means (34) for extracting retentates from said reaction space (31) and a space (32) for recovering the treated effluents, which space is separated from said reaction space (31) by said selective membrane or membranes (2), (4).
B01D 53/22 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by diffusion
The subject of the invention is a method of treating water by flocculation (4)/settling (5), comprising a step (3) for injecting a ballast and a step (7) for recirculating said ballast, characterized in that it includes a step (11) for continuously measuring the concentration of said ballast and a step of comparing said measurement with reference values. The subject of the invention is also a water treatment plant for implementing the method.
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