US20040025961A1 - Effluent purifying device - Google Patents
Effluent purifying device Download PDFInfo
- Publication number
- US20040025961A1 US20040025961A1 US10/311,572 US31157203A US2004025961A1 US 20040025961 A1 US20040025961 A1 US 20040025961A1 US 31157203 A US31157203 A US 31157203A US 2004025961 A1 US2004025961 A1 US 2004025961A1
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- Prior art keywords
- effluent
- purification plant
- vessel
- tank
- chamber
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0012—Settling tanks making use of filters, e.g. by floating layers of particulate material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
- C02F1/685—Devices for dosing the additives
- C02F1/686—Devices for dosing liquid additives
Definitions
- the subject of the present invention is a plant for the physico-chemical and bacteriological purification of water.
- the effluent purification plant according to the invention includes:
- a pump delivering the effluent in a pulsed manner into a chamber placed on the upper face of the clarification tank;
- At least one metering pump for adding an effluent coagulating or flocculating reactant into said chamber
- a delivery pipe taking the effluent laden with reactants from said chamber into the bottom part of a flocculation vessel placed inside the clarification tank, in which vessel a sludge bed forms, the effluent flowing upward through said bed and being clarified in contact with the latter.
- the plant according to the invention achieves a BOD abatement of more than 70% and excellent filtration of metals.
- BOD or biological oxygen demand which is the oxygen consumption of the microorganisms present in the effluent in order to assimilate the organic substances in this effluent.
- the flocculation vessel comprises a frustoconical upper part extended by a cylindrical lower part into which the pipe runs.
- the effluent laden with reactants is introduced into a region whose volume is relatively restricted, namely the cylindrical part of the flocculation vessel. In this restricted volume, the flocculation is particularly intense.
- the sludge formed by the accumulation of flocs may spill over from the flocculation vessel under the effect of an increase in the load.
- the flocculation takes place dynamically and is self-regulated. This is because, whatever the load to which the plant is subjected, the flocculation always takes place optimally, on the one hand ensuring intense flocculation in the cylindrical part and, on the other part, spilling the excess sludge out of the flocculation vessel.
- the delivery pipe comprises a first tube, one of the ends of which runs into the chamber and the other end of which is provided with radial homogenizing openings above the surface of the frustoconical vessel and a second tube, of larger diameter than the diameter of the first tube, the upper end of which covers the circumferential homogenizing openings of the first tube and the lower end of which runs into the bottom part of the frustoconical vessel.
- the configuration of the delivery pipe allows the effluent and the reactants to be homogeneously mixed before being introduced into the bottom part of the flocculation vessel.
- the lower part of the clarification tank has a frustoconical part which receives the sludge spilling over the flocculation vessel and a pump extracts the sludge collected in the frustoconical part of the clarification vessel.
- the sludge that spills out of the flocculation vessel is collected on a defined surface of the base of the clarification tank.
- This sludge can be easily extracted by a pump. Load variations may therefore be absorbed without any difficulty and the sludge bed is regulated autonomously.
- calibrated openings are provided in the upper part of the clarification tank so as to allow the clarified effluent to be poured into a storage tank surrounding the clarification tank.
- the storage tank surrounds the clarification tank, thereby making it possible to obtain a particularly compact plant in which the ground space occupied is markedly less than the plants of the prior art.
- the lower end of the delivery pipe has a divergent frustoconical section so as to improve the dispersion of the effluent in the sludge bed.
- a filter material is placed between the clarification tank and the storage tank, the clarified effluent flowing through said filter material before being stored in the bottom part of the storage tank.
- the metering pumps introduce reactants into the bottom part of the mixture chamber, upstream of a static mixer placed on an effluent feed pipe, and into the bottom of the cylindrical part of the flocculation vessel, respectively.
- the reactants are therefore introduced into the plant at points where their action is optimum.
- the effluent clarification plant includes:
- a pipe of larger diameter than the delivery pipe and coaxial with the latter, extending between the wall and the filtration vessel.
- the upper edge of the frustoconical part of the flocculation vessel is contiguous with the internal face of the tank.
- the filtration vessel has, on its lower face, openings protected by strainers allowing the filtered water to flow out.
- the filter substance allows residual pollutants at the outlet of the clarification vessel to be reduced.
- a pump sucks the clarified effluent out of the storage tank and introduces it into at least one annular chamber, placed on the external face of the storage tank, containing a granulate that fixes bacteriological elements.
- the clarified effluent is set in motion in an annular chamber containing a granulate that fixes the bacteriological elements.
- the vortex flow undergone by the effluent in the annular chamber allows there to be remarkably good contact between the granulate and the effluent and consequently excellent and rapid fixing of the bacteria.
- the BOD abatement reaches more than 95%.
- the annular chambers are four in number, each communicating with the one adjacent thereto via a conduit.
- Each of the annular chambers contains a granulate with the property of fixing specific bacteria, so that as the effluent passes in succession through the four chambers a remarkably good biological treatment is achieved.
- a recovery pump sucks up the clarified effluent in the upper annular chamber and reinjects it into the lower chambers.
- This recovery pump maintains a regular annular velocity of the effluent in which the granulate is in suspension.
- the storage tank, the clarification tank, the flocculation vessel and the annular chambers are made of plastic.
- FIG. 1 is a sectional view of the plant according to the invention.
- FIG. 2 shows the effluent purification plant according to the invention incorporated into a treatment installation.
- FIG. 3 shows an alternative embodiment of the invention, intended to deliver drinking water in isolated sites.
- the effluent purification plant comprises a cylindrical storage tank 1 .
- a cylindrical clarification tank 2 is placed concentrically inside the tank 1 .
- the clarification tank 2 in its upper part, has uniformly distributed calibrated circular openings 3 and, in its lower part, has a frustoconical section 4 .
- the concentric tanks 1 and 2 are joined by an annular platform 5 on which a filter material 8 rests.
- the annular platform 5 is pierced by uniformly distributed openings 6 .
- the openings 6 are each covered by a strainer 7 .
- a flocculation vessel 12 is placed inside the tank 2 .
- the vessel 12 consists of a frustoconical upper part 13 that has a downwardly decreasing cross section and is extended by a cylindrical lower part 14 .
- the flocculation vessel 12 is provided, on its lower face, with feet 15 that rest on the bottom of the tank 2 .
- An extraction pipe 17 runs between the feet 15 of the flocculation vessel 12 , a pump 18 doing the extraction.
- a chamber 20 is placed on the upper face of the tank 2 .
- the chamber 20 is fed by a pump 21 with effluent to be treated.
- a feed pipe 10 delivers the effluent to be treated into the chamber 20 , the displacement to be made being performed by a pump 21 .
- the feed pipe enters the chamber 20 tangentially, in such a way that the effluent is introduced into the chamber tangentially with an antivortex effect.
- a static mixer 11 is placed in the feed pipe upstream of the chamber 20 .
- Metering pumps 22 , 23 , 24 inject flocculating or coagulating reactants into the bottom part of the chamber 20 , into the feed pipe 10 , upstream of the static mixer 11 , and into the bottom of the cylindrical part of flocculation base 12 , respectively.
- a vertical delivery pipe 25 extends from the chamber 20 into the cylindrical part 14 of the flocculation vessel 12 .
- the delivery pipe 25 comprises a first tube 26 that runs into a second tube 27 of larger diameter than the diameter of the tube 26 .
- the tube 26 runs into the chamber 20 and its lower end is provided with radial openings 28 .
- a hemispherical element 29 blocks off the lower end of the tube 26 .
- the tube 27 covers the openings 28 of the tube 26 and extends down to the cylindrical part of the flocculation vessel 12 .
- the tank 1 receives four superposed annular chambers 31 , 32 , 33 , 34 .
- Each chamber communicates with the chamber that is adjacent to it via a conduit 35 .
- a pump 36 is provided that takes in from the bottom of the tank 1 via a pipe 37 and discharges into the lower annular chamber 31 .
- a recovery pump 39 takes in from the upper annular chamber 34 and delivers into the two intermediate chambers 32 and 33 .
- An air circuit 38 introduces compressed air into each of the annular chambers 31 , 32 , 33 and 34 and into each of the strainers 7 .
- the annular chambers are each equipped with a manhole 41 allowing access to the inside of the chambers.
- the upper annular chamber 34 extends up to the top of the storage tank 1 and is provided with an opening 43 that opens to the outside.
- a reactant is introduced into the effluent upstream of the static mixer, the latter ensuring that the effluent and the reactant are very rapidly mixed.
- Suction of the effluent by the pump 21 takes place intermittently, for example 15 to 30 seconds of suction followed by a rest time of 15 to 60 seconds, so that the effluent is introduced into the chamber 20 in a pulsed manner.
- the pump 22 injects a coagulating or flocculating reactant into the effluent.
- These reactants may be ferric chloride, aluminum sulfate or polymers and they depend on the type of effluent to be treated.
- the action of the pumps 22 and 23 corresponds to an effluent pulsation period.
- the effluent is brought into contact with a sludge bed consisting of flocs.
- the flocs are put into suspension by the pulsations that set the effluent in motion.
- the organic or inorganic pollutants aggregate on these flocs and as the effluent gradually passes through the sludge bed it becomes clarified.
- Introduction of flocculating reactant by the pump 24 makes it possible to intensify the flocculation.
- the clarified effluent Since the clarified effluent has a lower density than the flocs forming the sludge bed, it spills out of the clarification tank via the openings 3 made in the latter.
- This filter substance may consist of particles of quartz, pozzolana, active carbon, diatomaceous earth or pumice stone and makes it possible to reduce the residual load of the effluent after clarification.
- the filter substance may be washed by countercurrently introducing a water/air mixture via the nozzles 9 .
- the introduction of this mixture takes place simultaneously with, and in equal volume as, extraction of the excess sludge by the pump 18 so as not to disturb the clarification dynamics.
- the effluent has undergone a physico-chemical treatment and is therefore clear. It is stored in the lower part of the storage tank.
- the effluent is then sucked up by the pump 36 and, after air has been added, it is discharged tangentially into the annular chamber 31 so as to create a vortex inside this chamber.
- the chamber 31 contains a granulate that fixes the bacteria present in the effluent. Inside the annular chamber, the granulate is put into suspension and agitated under the effect of the vortex flow. By putting this granulate into suspension and agitating it, the bacteriological pollutants present in the effluent are fixed remarkably well.
- the pump 39 sucks up the effluent into the annular chambers 32 , 33 and 34 that communicate via the conduits 35 . It maintains a constant velocity in said annular chambers by reinjecting the effluent sucked up from the upper chamber 34 into the intermediate chambers 32 and 33 .
- Each of the chambers 31 , 32 and 33 contains a specific granulate (active carbon, sand or calibrated polystyrene beads) that acts on a specific bacterium in such a way that when the effluent is extracted from the annular chamber 34 via the opening 43 it has undergone a complete bacteriological treatment.
- the effluent may undergo a subsequent treatment, for example an addition of disinfectant represented by the reference 45 in FIG. 2.
- FIG. 3 shows an embodiment of the invention intended for delivering drinking water in isolated sites.
- the plant according to the invention is fed via a hand pump 50 .
- the tank 2 is divided by two horizontal walls 51 and 52 that define an upper part 47 , an intermediate part 48 and a lower part 49 .
- the upper part has a chamber 20 into which a pipe 25 runs via an opening made in the wall 52 .
- the delivery pipe 25 connects the chamber 20 to the flocculation vessel 12 located in the lower part of the tank 2 .
- the lower end of the pipe 25 has a divergent frustoconical section 57 .
- the flocculation vessel 12 rests on the bottom of the tank 2 and its frustoconical upper part 13 joins the internal wall of the tank 2 .
- the wall 51 is pierced by a circular opening onto which a discharge pipe 56 concentric with the delivery pipe 25 is connected.
- the discharge pipe 56 has radial overflow openings 59 at its upper end and terminates in a filtration tank 60 filled with a filter material such as sand.
- a pipe 66 allows the tank 60 to be filled with filter material.
- the bottom of the filtration tank 60 is provided with openings 61 protected by strainers 62 .
- Each strainer 62 is provided with a cleaning nozzle 65 connected to the pump 50 .
- Each of the upper, intermediate and lower parts of the tank 2 is provided with a draining valve 61 , 62 , 63 .
- the hand pump 50 thanks to a manual three-way valve 67 , can suck up a fluid coming from a well 68 or coming from the intermediate part of the tank 2 .
- this pump delivers either into the upper part of the tank 2 or into a pipe 70 that feeds the cleaning nozzles 65 .
- valves 67 and 68 are set so as to suck up nonpotable water from a well 68 and deliver this water into the upper part of the tank 2 .
- a flocculating or coagulating reactant is introduced into the chamber 20 by a pump (not shown).
- the water is brought into contact with a sludge bed consisting of flocs.
- the divergent frustoconical section of the delivery pipe 25 allows excellent dispersion of the water in the sludge bed. The water is therefore clarified on contact with the fluidized sludge bed.
- the clarified water undergoes a filtration operation.
- the water leaves the tank 60 via the openings 61 protected by the strainer 62 and is stored in the intermediate part 48 .
- the water may be withdrawn via the valve 62 , in order to be consumed.
- the water may also undergo a second clarification cycle by setting the valves 67 and 68 in such a way that the pump 60 sucks up, from the intermediate part 48 , water that has undergone a first clarification cycle and delivers this water into the upper part 47 in order to undergo a further clarification cycle.
- the valves 67 and 68 may also be set in such a way that water is sucked up from the intermediate part 49 and delivered via the pipe 70 into the cleaning nozzles 65 .
- the cleaning nozzles 65 open into the strainers 62 and the water sent countercurrently cleans the filter medium. During this operation, the valve 63 is open.
- the invention thus provides a particularly compact effluent purification plant of low installation costs, while being capable of carrying out excellent physico-chemical and bacteriological purification.
- this purification plant may be installed in the form of a module that incorporates the electronics for controlling the various pumps and rests on a transportable platform.
Abstract
Liquids such as waste water are clarified in a compact unit consisting of a conditioning stage and of a solid/liquid separating stage. In order to allow the liquids to be clarified as completely as possible in a coherent step, the downward flowing suspension under the influence of gravity is forcibly subjected to a substantially vertical acceleration superimposed on the force of gravity. Preferably, the suspension is subjected to a combination of mechanical, magnetic and electric forces. Consequently, not only a largely complete clarification of the liquid is obtained, even when said liquid entrains the most different groups of substances, but also the dwelling time during the solid/liquid separation is shortened, and the dimensions of the clarification reactor are relatively reduced.
Description
- The subject of the present invention is a plant for the physico-chemical and bacteriological purification of water.
- Most industrial effluents are currently discharged into purification stations in order to be treated and purified.
- For this purpose, contracts are drawn up between industrial concerns that discharge effluents and water treatment companies.
- The cost of treating this effluent may be very high for the industrial concerns and may in certain cases exceed the water consumption cost.
- When the responsibility for effluent treatment is thus transferred back to the industrial concerns, it may be envisioned equipping the latter with their own means for treating spent effluents.
- However, current plants for treatment spent effluents are poorly suited to treating spent effluents on the scale of an enterprise that discharges small volumes of water, compared with, for example, a local community.
- This is because current plants comprise several elements which carry out the effluent homogenization, degreasing, coagulation and flocculation operations sequentially. These plants are expensive and take up a large area of ground.
- For these reasons, it is difficult, for an industrial concern, to be equipped with its own installation for purifying its effluents.
- It is an object of the invention to provide an effluent treatment plant which takes up a small amount of space and has a low installation and operating cost, while still achieving a high degree of purification.
- For this purpose, the effluent purification plant according to the invention includes:
- a clarification tank;
- a pump delivering the effluent in a pulsed manner into a chamber placed on the upper face of the clarification tank;
- at least one metering pump for adding an effluent coagulating or flocculating reactant into said chamber; and
- a delivery pipe taking the effluent laden with reactants from said chamber into the bottom part of a flocculation vessel placed inside the clarification tank, in which vessel a sludge bed forms, the effluent flowing upward through said bed and being clarified in contact with the latter.
- By introducing the effluent into the base of the sludge bed, the aggregation of the organic and inorganic pollutants present in the effluent on the flocs constituting the sludge bed is maximized. In addition, the inflow of the effluent in a pulsed manner allows the flocs to be set in motion and increases their aggregation capability. This plant therefore allows very effective flocculation in a short time.
- As a corollary, the consumption of chemical reactants is reduced because the flocculation process has been maximized.
- The plant according to the invention achieves a BOD abatement of more than 70% and excellent filtration of metals.
- One of the major criteria regarding pollution of an effluent is the BOD or biological oxygen demand, which is the oxygen consumption of the microorganisms present in the effluent in order to assimilate the organic substances in this effluent.
- Particularly advantageously, the flocculation vessel comprises a frustoconical upper part extended by a cylindrical lower part into which the pipe runs.
- Because of this particularly advantageous configuration of the flocculation vessel, the effluent laden with reactants is introduced into a region whose volume is relatively restricted, namely the cylindrical part of the flocculation vessel. In this restricted volume, the flocculation is particularly intense.
- Moreover, thanks to the inclined surface of the frustoconical part, the sludge formed by the accumulation of flocs may spill over from the flocculation vessel under the effect of an increase in the load.
- The flocculation takes place dynamically and is self-regulated. This is because, whatever the load to which the plant is subjected, the flocculation always takes place optimally, on the one hand ensuring intense flocculation in the cylindrical part and, on the other part, spilling the excess sludge out of the flocculation vessel.
- According to one particularly advantageous feature of the invention, the delivery pipe comprises a first tube, one of the ends of which runs into the chamber and the other end of which is provided with radial homogenizing openings above the surface of the frustoconical vessel and a second tube, of larger diameter than the diameter of the first tube, the upper end of which covers the circumferential homogenizing openings of the first tube and the lower end of which runs into the bottom part of the frustoconical vessel.
- The configuration of the delivery pipe allows the effluent and the reactants to be homogeneously mixed before being introduced into the bottom part of the flocculation vessel.
- Advantageously, the lower part of the clarification tank has a frustoconical part which receives the sludge spilling over the flocculation vessel and a pump extracts the sludge collected in the frustoconical part of the clarification vessel.
- Thanks to the frustoconical shape of the lower part of the clarification tank, the sludge that spills out of the flocculation vessel is collected on a defined surface of the base of the clarification tank. This sludge can be easily extracted by a pump. Load variations may therefore be absorbed without any difficulty and the sludge bed is regulated autonomously.
- Preferably, calibrated openings are provided in the upper part of the clarification tank so as to allow the clarified effluent to be poured into a storage tank surrounding the clarification tank.
- The storage tank surrounds the clarification tank, thereby making it possible to obtain a particularly compact plant in which the ground space occupied is markedly less than the plants of the prior art.
- Advantageously, the lower end of the delivery pipe has a divergent frustoconical section so as to improve the dispersion of the effluent in the sludge bed.
- According to a preferred embodiment of the invention, a filter material is placed between the clarification tank and the storage tank, the clarified effluent flowing through said filter material before being stored in the bottom part of the storage tank.
- According to an advantageous feature, the metering pumps introduce reactants into the bottom part of the mixture chamber, upstream of a static mixer placed on an effluent feed pipe, and into the bottom of the cylindrical part of the flocculation vessel, respectively. The reactants are therefore introduced into the plant at points where their action is optimum.
- According to advantageous features that the invention may have, the effluent clarification plant includes:
- a filtration vessel containing a filter material placed between the chamber and the flocculation vessel;
- a wall located between the flocculation vessel and the filtration vessel; and
- a pipe, of larger diameter than the delivery pipe and coaxial with the latter, extending between the wall and the filtration vessel.
- Preferably, the upper edge of the frustoconical part of the flocculation vessel is contiguous with the internal face of the tank.
- Preferably, the filtration vessel has, on its lower face, openings protected by strainers allowing the filtered water to flow out.
- The filter substance allows residual pollutants at the outlet of the clarification vessel to be reduced.
- According to one particularly advantageous embodiment of the invention, a pump sucks the clarified effluent out of the storage tank and introduces it into at least one annular chamber, placed on the external face of the storage tank, containing a granulate that fixes bacteriological elements.
- The clarified effluent is set in motion in an annular chamber containing a granulate that fixes the bacteriological elements. The vortex flow undergone by the effluent in the annular chamber allows there to be remarkably good contact between the granulate and the effluent and consequently excellent and rapid fixing of the bacteria. The BOD abatement reaches more than 95%.
- Preferably, the annular chambers are four in number, each communicating with the one adjacent thereto via a conduit.
- Each of the annular chambers contains a granulate with the property of fixing specific bacteria, so that as the effluent passes in succession through the four chambers a remarkably good biological treatment is achieved.
- Advantageously, a recovery pump sucks up the clarified effluent in the upper annular chamber and reinjects it into the lower chambers.
- This recovery pump maintains a regular annular velocity of the effluent in which the granulate is in suspension.
- Preferably, the storage tank, the clarification tank, the flocculation vessel and the annular chambers are made of plastic.
- In order for the invention to be well understood, it will be described below with reference to the appended schematic drawing showing a preferred embodiment of the effluent clarification plant.
- FIG. 1 is a sectional view of the plant according to the invention.
- FIG. 2 shows the effluent purification plant according to the invention incorporated into a treatment installation.
- FIG. 3 shows an alternative embodiment of the invention, intended to deliver drinking water in isolated sites.
- As the sectional view in FIG. 1 shows, the effluent purification plant comprises a
cylindrical storage tank 1. Acylindrical clarification tank 2 is placed concentrically inside thetank 1. Theclarification tank 2, in its upper part, has uniformly distributed calibratedcircular openings 3 and, in its lower part, has a frustoconical section 4. Theconcentric tanks annular platform 5 on which a filter material 8 rests. Theannular platform 5 is pierced by uniformly distributedopenings 6. Theopenings 6 are each covered by a strainer 7. - A
flocculation vessel 12 is placed inside thetank 2. Thevessel 12 consists of a frustoconical upper part 13 that has a downwardly decreasing cross section and is extended by a cylindricallower part 14. Theflocculation vessel 12 is provided, on its lower face, withfeet 15 that rest on the bottom of thetank 2. - An
extraction pipe 17 runs between thefeet 15 of theflocculation vessel 12, apump 18 doing the extraction. - A
chamber 20 is placed on the upper face of thetank 2. Thechamber 20 is fed by apump 21 with effluent to be treated. - A
feed pipe 10 delivers the effluent to be treated into thechamber 20, the displacement to be made being performed by apump 21. - The feed pipe enters the
chamber 20 tangentially, in such a way that the effluent is introduced into the chamber tangentially with an antivortex effect. - A static mixer11 is placed in the feed pipe upstream of the
chamber 20. - Metering pumps22, 23, 24 inject flocculating or coagulating reactants into the bottom part of the
chamber 20, into thefeed pipe 10, upstream of the static mixer 11, and into the bottom of the cylindrical part offlocculation base 12, respectively. - A
vertical delivery pipe 25 extends from thechamber 20 into thecylindrical part 14 of theflocculation vessel 12. Thedelivery pipe 25 comprises afirst tube 26 that runs into asecond tube 27 of larger diameter than the diameter of thetube 26. At its upper end, thetube 26 runs into thechamber 20 and its lower end is provided with radial openings 28. Ahemispherical element 29 blocks off the lower end of thetube 26. Thetube 27 covers the openings 28 of thetube 26 and extends down to the cylindrical part of theflocculation vessel 12. - On its outer face, the
tank 1 receives four superposedannular chambers - Each chamber communicates with the chamber that is adjacent to it via a
conduit 35. - A
pump 36 is provided that takes in from the bottom of thetank 1 via a pipe 37 and discharges into the lowerannular chamber 31. - A
recovery pump 39 takes in from the upperannular chamber 34 and delivers into the twointermediate chambers - An air circuit38 introduces compressed air into each of the
annular chambers - This introduction is performed by a compressor (not shown in the drawing).
- The annular chambers are each equipped with a manhole41 allowing access to the inside of the chambers.
- The upper
annular chamber 34 extends up to the top of thestorage tank 1 and is provided with an opening 43 that opens to the outside. - The operation of the plant described above is as follows: the effluent to be treated firstly undergoes a physico-chemical treatment and then a bacteriological treatment.
- The effluent, coming from a
storage region 45, is sucked up by thepump 21 and introduced into thechamber 20. A reactant is introduced into the effluent upstream of the static mixer, the latter ensuring that the effluent and the reactant are very rapidly mixed. Suction of the effluent by thepump 21 takes place intermittently, for example 15 to 30 seconds of suction followed by a rest time of 15 to 60 seconds, so that the effluent is introduced into thechamber 20 in a pulsed manner. In thechamber 20, thepump 22 injects a coagulating or flocculating reactant into the effluent. These reactants may be ferric chloride, aluminum sulfate or polymers and they depend on the type of effluent to be treated. The action of thepumps - Under the effect of the pulsed delivery by the
pump 21, the effluent laden with reactants is flushed out of thechamber 20 and escapes via thevertical pipe 25. - The openings28 made in the
upper tube 26 of the pipe allow the effluent/reactant solution to be homogenized. - At the bottom of the
delivery pipe 25, the effluent is brought into contact with a sludge bed consisting of flocs. The flocs are put into suspension by the pulsations that set the effluent in motion. On contact with the flocs forming the sludge bed, the organic or inorganic pollutants aggregate on these flocs and as the effluent gradually passes through the sludge bed it becomes clarified. Introduction of flocculating reactant by thepump 24 makes it possible to intensify the flocculation. - In the event of an increase in load, the excess sludge spills out of the flocculation vessel and collects at the center of the frustoconical part4 of the
clarification tank 2. It is extracted by thepump 18. - Since the clarified effluent has a lower density than the flocs forming the sludge bed, it spills out of the clarification tank via the
openings 3 made in the latter. - The clarified effluent spills out into the lower part of the
storage tank 1 which surrounds the clarification tank, flowing through the filter substance 8. - This filter substance may consist of particles of quartz, pozzolana, active carbon, diatomaceous earth or pumice stone and makes it possible to reduce the residual load of the effluent after clarification.
- The filter substance may be washed by countercurrently introducing a water/air mixture via the nozzles9. The introduction of this mixture takes place simultaneously with, and in equal volume as, extraction of the excess sludge by the
pump 18 so as not to disturb the clarification dynamics. - At this point, the effluent has undergone a physico-chemical treatment and is therefore clear. It is stored in the lower part of the storage tank.
- The effluent is then sucked up by the
pump 36 and, after air has been added, it is discharged tangentially into theannular chamber 31 so as to create a vortex inside this chamber. Thechamber 31 contains a granulate that fixes the bacteria present in the effluent. Inside the annular chamber, the granulate is put into suspension and agitated under the effect of the vortex flow. By putting this granulate into suspension and agitating it, the bacteriological pollutants present in the effluent are fixed remarkably well. - The
pump 39 sucks up the effluent into theannular chambers conduits 35. It maintains a constant velocity in said annular chambers by reinjecting the effluent sucked up from theupper chamber 34 into theintermediate chambers chambers annular chamber 34 via the opening 43 it has undergone a complete bacteriological treatment. - The effluent may undergo a subsequent treatment, for example an addition of disinfectant represented by the
reference 45 in FIG. 2. - FIG. 3 shows an embodiment of the invention intended for delivering drinking water in isolated sites.
- The plant according to the invention is fed via a
hand pump 50. - The
tank 2 is divided by twohorizontal walls intermediate part 48 and a lower part 49. - The upper part has a
chamber 20 into which apipe 25 runs via an opening made in thewall 52. - The
delivery pipe 25 connects thechamber 20 to theflocculation vessel 12 located in the lower part of thetank 2. - The lower end of the
pipe 25 has a divergent frustoconical section 57. - The
flocculation vessel 12 rests on the bottom of thetank 2 and its frustoconical upper part 13 joins the internal wall of thetank 2. - The frustoconical part13 of the flocculation vessel is pierced by
overflow openings 55. - The
wall 51 is pierced by a circular opening onto which adischarge pipe 56 concentric with thedelivery pipe 25 is connected. - The
discharge pipe 56 hasradial overflow openings 59 at its upper end and terminates in afiltration tank 60 filled with a filter material such as sand. - A
pipe 66 allows thetank 60 to be filled with filter material. - The bottom of the
filtration tank 60 is provided withopenings 61 protected by strainers 62. - Each strainer62 is provided with a cleaning
nozzle 65 connected to thepump 50. - Each of the upper, intermediate and lower parts of the
tank 2 is provided with a drainingvalve - The
hand pump 50, thanks to a manual three-way valve 67, can suck up a fluid coming from a well 68 or coming from the intermediate part of thetank 2. By means of a manual three-way valve 68, this pump delivers either into the upper part of thetank 2 or into a pipe 70 that feeds thecleaning nozzles 65. - The operation of this embodiment of the invention will now be described.
- The valves67 and 68 are set so as to suck up nonpotable water from a well 68 and deliver this water into the upper part of the
tank 2. - The water undergoes a settling operation and the particles are deposited on the
wall 52. - A flocculating or coagulating reactant is introduced into the
chamber 20 by a pump (not shown). - When a sufficient volume of water has been introduced into the upper part47, the water spills out into the
chamber 20 and then into thedelivery pipe 25 that runs into theflocculation vessel 12. - At the bottom of the
delivery pipe 25, the water is brought into contact with a sludge bed consisting of flocs. The divergent frustoconical section of thedelivery pipe 25 allows excellent dispersion of the water in the sludge bed. The water is therefore clarified on contact with the fluidized sludge bed. - The excess sludge discharges from the
flocculation vessel 12 through theopenings 55 and spills out into the bottom of thetank 2. This sludge may be extracted via thevalve 63. - Under the effect of the pulsed delivery by the
pump 50, the clarified water escapes from the lower part 49 via thedischarge pipe 56 and spills out via theopenings 59 into thefiltration tank 60. - Since the tank is filled with a filter material such as sand, the clarified water undergoes a filtration operation. The water leaves the
tank 60 via theopenings 61 protected by the strainer 62 and is stored in theintermediate part 48. - The water may be withdrawn via the valve62, in order to be consumed.
- The water may also undergo a second clarification cycle by setting the valves67 and 68 in such a way that the
pump 60 sucks up, from theintermediate part 48, water that has undergone a first clarification cycle and delivers this water into the upper part 47 in order to undergo a further clarification cycle. - The valves67 and 68 may also be set in such a way that water is sucked up from the intermediate part 49 and delivered via the pipe 70 into the
cleaning nozzles 65. The cleaning nozzles 65 open into the strainers 62 and the water sent countercurrently cleans the filter medium. During this operation, thevalve 63 is open. - The invention thus provides a particularly compact effluent purification plant of low installation costs, while being capable of carrying out excellent physico-chemical and bacteriological purification.
- It goes without saying that the invention is not limited to the embodiment described above by way of example; rather it encompasses all embodiment variants thereof. Thus, this purification plant may be installed in the form of a module that incorporates the electronics for controlling the various pumps and rests on a transportable platform.
Claims (16)
1. An effluent purification plant comprising a clarification tank (2) characterized in that it includes:
a pump (21, 50) delivering the effluent in a pulsed manner into a chamber (20) placed on the upper face of the clarification tank (2);
at least one metering pump (22, 23, 24) for adding an effluent coagulating or flocculating reactant; and
a pipe (25) taking the effluent laden with reactant(s) from said chamber into the bottom part of a flocculation vessel (12) placed inside the clarification tank, in which vessel a sludge bed forms, the effluent flowing upward through said bed and being clarified in contact with the latter.
2. The effluent purification plant as claimed in claim 1 , characterized in that the flocculation vessel (12) comprises a frustoconical upper part (13) extended by a cylindrical lower part (14) into which the pipe (25) runs.
3. The effluent purification plant as claimed in claim 1 or claim 2 , characterized in that the pipe (25) comprises a first tube (26), one of the ends of which runs into the chamber (20) and the other end of which is provided with radial homogenizing openings (28) and a second tube (27), of larger diameter than the diameter of the first tube (26), the upper end of which covers the homogenizing openings (28) of the first tube and the lower end of which runs into the bottom part of the frustoconical vessel (12).
4. The effluent purification plant as claimed in one of claims 1 to 3 , characterized in that the lower part of the clarification tank (2) has a frustoconical part (4) which receives the sludge spilling over the flocculation vessel.
5. The effluent purification plant as claimed in one of claims 1 to 4 , characterized in that in that a pump (8) extracts the sludge collected in the frustoconical part of the clarification vessel.
6. The effluent purification plant as claimed in one of claims 1 to 5 , characterized in that calibrated openings (3) are provided in the upper part of the clarification tank (2) so as to allow the clarified effluent to be poured into a storage tank surrounding the clarification tank (2).
7. The effluent purification plant as claimed in one of claims 1 to 6 , characterized in that the lower end of the delivery pipe (25) has a divergent frustoconical section.
8. The effluent purification plant as claimed in one of claims 1 to 7 , characterized in that a filter material (8) is placed between the clarification tank (2) and the storage tank (1), the clarified effluent flowing through said filter material before being stored in the bottom part of the storage tank (1).
9. The effluent purification plant as claimed in one of claims 1 to 8 , characterized in that the metering pumps (22, 23, 24) introduce reactants into the bottom part of the chamber (2), upstream of a static mixer (11) placed on an effluent feed pipe (10), and into the bottom of the cylindrical part of the flocculation vessel, respectively.
10. The effluent purification plant as claimed in one of claims 1 to 9 , characterized in that it includes:
a filtration vessel (60) containing a filter material placed between the chamber (20) and the flocculation vessel (12);
a wall (51) located between the flocculation vessel (12) and the filtration vessel (20); and
a discharge pipe (56), of larger diameter than the delivery pipe (25) and coaxial with the latter, extending between the wall (51) and the filtration vessel (20).
11. The effluent purification plant as claimed in claim 10 , characterized in that the upper edge of the frustoconical part (13) of the flocculation vessel (12) is contiguous with the internal face of the tank (2).
12. The effluent purification plant as claimed in claim 10 or claim 11 , characterized in that the filtration vessel (60) has, on its lower face, openings (61) protected by strainers (62) allowing the filtered water to flow out.
13. The effluent purification plant as claimed in one of claims 1 to 12 , characterized in that a pump (36) sucks the clarified effluent out of the storage tank (1) and introduces it into at least one annular chamber (31), placed on the external face of the storage tank, containing a granulate that fixes bacteriological elements.
14. The effluent purification plant as claimed in claim 13 , characterized in that the annular chambers are four in number (31, 32, 33, 34), each communicating with the one adjacent thereto via a conduit (35).
15. The effluent purification plant as claimed in either of claims 13 and 14, characterized in that a recovery pump (39) sucks up the clarified effluent in the upper annular chamber (34) and reinjects it into the lower chambers (31, 32, 33).
16. The effluent purification plant as claimed in either of claims 1 and 15, characterized in that the storage tank (1), the clarification tank (2), the flocculation vessel (12) and the annular chambers are made of plastic.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0007642 | 2000-06-15 | ||
FR0007642A FR2810310B1 (en) | 2000-06-15 | 2000-06-15 | EFFLUENT PURIFICATION DEVICE |
PCT/FR2001/001817 WO2001096246A1 (en) | 2000-06-15 | 2001-06-12 | Effluent purifying device |
Publications (1)
Publication Number | Publication Date |
---|---|
US20040025961A1 true US20040025961A1 (en) | 2004-02-12 |
Family
ID=8851294
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/311,572 Abandoned US20040025961A1 (en) | 2000-06-15 | 2001-06-12 | Effluent purifying device |
Country Status (14)
Country | Link |
---|---|
US (1) | US20040025961A1 (en) |
EP (1) | EP1292542A1 (en) |
JP (1) | JP2004503368A (en) |
KR (1) | KR20030009539A (en) |
CN (1) | CN1443139A (en) |
AP (1) | AP2002002686A0 (en) |
AU (1) | AU2001267632A1 (en) |
BR (1) | BR0111568A (en) |
CA (1) | CA2412487A1 (en) |
EA (1) | EA004018B1 (en) |
FR (1) | FR2810310B1 (en) |
MA (1) | MA26049A1 (en) |
WO (1) | WO2001096246A1 (en) |
ZA (1) | ZA200210208B (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060222104A1 (en) * | 2005-04-05 | 2006-10-05 | Braithwaite Richard N | Feed forward amplifier system and method using the pilot frequency from a positive feedback pilot generation and detection circuit to improve second loop convergence |
US20080185321A1 (en) * | 2005-03-16 | 2008-08-07 | Bernard Beaulieu | Effluent Purifying Plant with Centralized Structure |
US20110192780A1 (en) * | 2006-01-20 | 2011-08-11 | Bernard Beaulieu | Household effluent purufication plant |
WO2012042530A1 (en) * | 2010-09-27 | 2012-04-05 | Tata Consultancy Services Limited | Apparatus for water purification |
AT515773A4 (en) * | 2014-10-24 | 2015-12-15 | Thomas Ing Mag Wurmbrand | filter |
US9782699B2 (en) | 2015-02-27 | 2017-10-10 | Recovered Energy, Inc. | Liquid refinement |
US10343089B2 (en) | 2015-02-27 | 2019-07-09 | Recovered Energy, Inc. | Liquid refinement |
US10343088B2 (en) | 2015-02-27 | 2019-07-09 | Recovered Energy, Inc. | Liquid refinement |
US10384967B2 (en) * | 2014-07-24 | 2019-08-20 | Oasys Water LLC | Water treatment systems and methods |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2899823B1 (en) * | 2006-04-18 | 2008-08-29 | Labono Sas | EFFLUENT PURIFICATION DEVICE |
KR100930827B1 (en) * | 2007-10-25 | 2009-12-10 | 지에스건설 주식회사 | Solid-liquid separator for water treatment |
US8157988B2 (en) | 2008-10-23 | 2012-04-17 | Veolia Water Solutions & Technologies Support | Ballast flocculation and sedimentation water treatment system with simplified sludge recirculation, and process therefor |
WO2011129955A1 (en) * | 2010-04-14 | 2011-10-20 | Univation Technologies, Llc | Apparatus and methods for separating particulates from a liquid |
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US1030366A (en) * | 1911-08-21 | 1912-06-25 | David L Winters | Water-purifying apparatus. |
US5728295A (en) * | 1996-04-19 | 1998-03-17 | Fuji Hunt Photographic Chemicals, Inc. | Apparatus for removing metal ions and/or complexes containing metal ions from a solution |
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FR1081214A (en) * | 1953-04-27 | 1954-12-16 | Entpr Et De Pose Pour Tous Pro | Improvements made to water treatment and settling basins |
BE543014A (en) * | 1954-11-23 | |||
FR2105515A5 (en) * | 1970-09-02 | 1972-04-28 | Sogreah | Extractors for treatment appts - for liquids polluted with mud, sand, fibres |
FR2339575A1 (en) * | 1976-01-30 | 1977-08-26 | Degremont | Treating drinking and industrial water contg. mineral salts - by mixing with precipitating agents in dispersion zone then decanting |
DE3612313A1 (en) * | 1986-04-11 | 1987-10-15 | N A G Innovations Und Umweltte | Process and apparatus for separating the solids from the carrier liquid in suspensions |
FI89703C (en) * | 1989-03-06 | 1993-11-10 | Wiser Oy | Device for the treatment of liquids, especially waste water |
DE4225957C2 (en) * | 1992-08-06 | 1998-12-03 | Adalbert Dr Ing Nagy | Process for purifying liquids and apparatus for carrying out this process |
FR2767523B1 (en) * | 1997-08-25 | 1999-10-15 | Sarl Drive | PURIFICATION STATION WITH SELF-SUPPORTING MODULAR STRUCTURE |
-
2000
- 2000-06-15 FR FR0007642A patent/FR2810310B1/en not_active Expired - Fee Related
-
2001
- 2001-06-12 WO PCT/FR2001/001817 patent/WO2001096246A1/en not_active Application Discontinuation
- 2001-06-12 JP JP2002510393A patent/JP2004503368A/en active Pending
- 2001-06-12 CA CA002412487A patent/CA2412487A1/en not_active Abandoned
- 2001-06-12 CN CN01812942A patent/CN1443139A/en active Pending
- 2001-06-12 EP EP01945403A patent/EP1292542A1/en not_active Withdrawn
- 2001-06-12 KR KR1020027017191A patent/KR20030009539A/en not_active Application Discontinuation
- 2001-06-12 BR BR0111568-5A patent/BR0111568A/en not_active Application Discontinuation
- 2001-06-12 AP APAP/P/2002/002686A patent/AP2002002686A0/en unknown
- 2001-06-12 US US10/311,572 patent/US20040025961A1/en not_active Abandoned
- 2001-06-12 EA EA200300022A patent/EA004018B1/en not_active IP Right Cessation
- 2001-06-12 AU AU2001267632A patent/AU2001267632A1/en not_active Abandoned
-
2002
- 2002-12-16 MA MA26956A patent/MA26049A1/en unknown
- 2002-12-17 ZA ZA200210208A patent/ZA200210208B/en unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US1030366A (en) * | 1911-08-21 | 1912-06-25 | David L Winters | Water-purifying apparatus. |
US5728295A (en) * | 1996-04-19 | 1998-03-17 | Fuji Hunt Photographic Chemicals, Inc. | Apparatus for removing metal ions and/or complexes containing metal ions from a solution |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080185321A1 (en) * | 2005-03-16 | 2008-08-07 | Bernard Beaulieu | Effluent Purifying Plant with Centralized Structure |
US7524415B2 (en) | 2005-03-16 | 2009-04-28 | Bernard Beaulieu | Effluent purifying plant with centralized structure |
US20060222104A1 (en) * | 2005-04-05 | 2006-10-05 | Braithwaite Richard N | Feed forward amplifier system and method using the pilot frequency from a positive feedback pilot generation and detection circuit to improve second loop convergence |
US20110192780A1 (en) * | 2006-01-20 | 2011-08-11 | Bernard Beaulieu | Household effluent purufication plant |
US8048298B2 (en) * | 2006-01-20 | 2011-11-01 | Bernard Beaulieu | Household effluent purification plant |
WO2012042530A1 (en) * | 2010-09-27 | 2012-04-05 | Tata Consultancy Services Limited | Apparatus for water purification |
US10384967B2 (en) * | 2014-07-24 | 2019-08-20 | Oasys Water LLC | Water treatment systems and methods |
AT515773A4 (en) * | 2014-10-24 | 2015-12-15 | Thomas Ing Mag Wurmbrand | filter |
AT515773B1 (en) * | 2014-10-24 | 2015-12-15 | Thomas Ing Mag Wurmbrand | filter |
US9782699B2 (en) | 2015-02-27 | 2017-10-10 | Recovered Energy, Inc. | Liquid refinement |
US9782698B2 (en) | 2015-02-27 | 2017-10-10 | Recovered Energy, Inc. | Liquid refinement |
US9782697B2 (en) | 2015-02-27 | 2017-10-10 | Recovered Energy, Inc. | Liquid refinement |
US10343089B2 (en) | 2015-02-27 | 2019-07-09 | Recovered Energy, Inc. | Liquid refinement |
US10343088B2 (en) | 2015-02-27 | 2019-07-09 | Recovered Energy, Inc. | Liquid refinement |
Also Published As
Publication number | Publication date |
---|---|
EA004018B1 (en) | 2003-12-25 |
JP2004503368A (en) | 2004-02-05 |
AU2001267632A1 (en) | 2001-12-24 |
EA200300022A1 (en) | 2003-04-24 |
CA2412487A1 (en) | 2001-12-20 |
BR0111568A (en) | 2004-07-06 |
CN1443139A (en) | 2003-09-17 |
FR2810310B1 (en) | 2002-07-26 |
KR20030009539A (en) | 2003-01-29 |
ZA200210208B (en) | 2003-11-30 |
FR2810310A1 (en) | 2001-12-21 |
MA26049A1 (en) | 2004-04-01 |
WO2001096246A1 (en) | 2001-12-20 |
AP2002002686A0 (en) | 2002-12-31 |
EP1292542A1 (en) | 2003-03-19 |
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Legal Events
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AS | Assignment |
Owner name: HTCI, FRANCE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BEAULIEU, BERNARD;REEL/FRAME:014310/0754 Effective date: 20030720 |
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STCB | Information on status: application discontinuation |
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