WO1993004003A1 - Procede et dispositif de traitement de liquides pollues - Google Patents

Procede et dispositif de traitement de liquides pollues Download PDF

Info

Publication number
WO1993004003A1
WO1993004003A1 PCT/EP1991/001539 EP9101539W WO9304003A1 WO 1993004003 A1 WO1993004003 A1 WO 1993004003A1 EP 9101539 W EP9101539 W EP 9101539W WO 9304003 A1 WO9304003 A1 WO 9304003A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
container
electrolysis
cathode
inlet
Prior art date
Application number
PCT/EP1991/001539
Other languages
German (de)
English (en)
Inventor
Kai Konradt
Original Assignee
Iwatech Konradt Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Iwatech Konradt Gmbh filed Critical Iwatech Konradt Gmbh
Priority to PCT/EP1991/001539 priority Critical patent/WO1993004003A1/fr
Publication of WO1993004003A1 publication Critical patent/WO1993004003A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • 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
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/465—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electroflotation
    • 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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • 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
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/46104—Devices therefor; Their operating or servicing
    • C02F1/46109—Electrodes
    • C02F2001/46133—Electrodes characterised by the 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
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/46104—Devices therefor; Their operating or servicing
    • C02F1/46109—Electrodes
    • C02F2001/46152—Electrodes characterised by the shape or form
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/06—Controlling or monitoring parameters in water treatment pH

Definitions

  • the invention relates to a method for treating contaminated liquids, in particular pollutants such as heavy metals, oils, fats, hydrocarbons and the like, containing wastewater, gas bubbles being generated in the liquid by electrolytic treatment and adhering to and adhering to them pollutant particles collecting the liquid surface are skimmed off.
  • pollutants such as heavy metals, oils, fats, hydrocarbons and the like
  • the invention also relates to an apparatus for performing this method, with a container for the liquid and an electrolysis device with an anode / cathode arrangement through which the liquid flows.
  • the present invention is therefore based on the object of developing a method of the generic type with which particularly effective and effective treatment of contaminated liquids is possible in a simple and economical manner. Furthermore, a device tion for performing the method can be created, which should be characterized by simple structure and low manufacturing and operating costs.
  • the liquid is placed in a continuous, vertical, bottom-up flow for the duration of the electrolysis treatment.
  • the electrolysis treatment is accordingly carried out, while the liquid in the direction of buoyancy of the electrolytically generated gas bubbles and the pollutant particles (flakes or "Flotate") flows so that the pollutants are carried along on the one hand by the buoyancy of the gas bubbles and on the other hand by the flow of the liquid upwards.
  • the buoyancy of the pollutant particles generated by the gas bubbles is advantageously supported by the liquid flow.
  • the flow in the direction of buoyancy is so slow and practically homogeneous according to the invention that turbulence is avoided.
  • the procedure is characterized by a high effectiveness.
  • the liquid is placed in a continuous, horizontal flow for a flotation phase.
  • the flow velocity of the liquid is also so low that there is an essentially homogeneous, swirl-free flow.
  • the respective flow rate both in the vertical and in the horizontal direction can be changed very simply by adjusting the amount of liquid supplied to match the flow cross sections present.
  • the flotation phase advantageously lasts so long that practically all pollutant particles can collect on the top of the liquid surface. This is the case after about half an hour. Due to the horizontal flow, the pollutants or the floating layer formed by them are also taken horizontally and thus moved to a skimmer, where they are skimmed very carefully and without swirling, i.e. are "stripped" off the liquid surface with a scraper that moves very slowly in the horizontal direction.
  • the pollutant sludge obtained in this way is subsequently dewatered in particular without pressure, that is to say it is poured into a filter container, so that the water still present can drip downward.
  • the pressure-free drainage is advantageous compared to pressure drainage, because this keeps any pollutants, such as oils in particular, from them.
  • the dewatering creates a puncture-proof mass (so-called "mud cake") that dries out almost completely after a further drying time and then one suitable disposal, in particular special waste incineration, can be supplied.
  • the cleaned water can advantageously be introduced directly into the usual sewage system, but - because of the good cleaning - can even be used again, for example for cleaning and / or cooling purposes, for example for street cleaning, toilet flushing and the like.
  • the water drained from the pollutant sludge is preferably returned to the electrolysis treatment.
  • the liquid to be cleaned is subjected to a chemical treatment in particular to precipitate pollutants before the electrolysis treatment.
  • the liquid is first subjected to a pH reduction by adding an acid and then to a pH increase by adding an alkali, or vice versa.
  • the pH is lowered to about 3 and then raised again to about 7 (neutral).
  • This chemical treatment leads to an emulsion splitting, ie to the "breaking up" of the liquid, as a result of which heavy metals in particular, but advantageously also PCB and PAH, are precipitated.
  • the resulting particles can subsequently be separated very effectively by the electrolysis treatment according to the invention.
  • the device according to the invention is characterized in that the electrolysis device is arranged within the liquid container in such a way that the liquid flowing in through an inlet opening flows vertically through the electrolysis device from bottom to top.
  • the container has an elongated, trough-like shape, the inlet opening and the electrolysis device being arranged on a narrow side of the trough-like container and on the opposite side a skimmer for a separating pollutant floating layer and an overflow for the treated liquid.
  • the electrolysis device is completely below the level of the surface of the liquid contained in the container.
  • the liquid continuously supplied via the inlet opening first flows vertically through the electrolysis device, then emerges from it and flows horizontally in the direction of the overflow, as a result of which the separated pollutants are taken along as a layer to the skimming device.
  • a device for chemical precipitation of pollutants which consists of two part containers, is preferably arranged directly upstream of the container, the first part container having an inlet for the liquid to be treated and being connected to the second part container via an overflow, and the lower part of the second partial container has an outlet opening which preferably merges directly into the inlet opening of the container and thus into the electrolysis device.
  • the first part container is equipped with an acid inlet and the second sub-container with an alkali inlet. These inlets have valves which are actuated by a regulating device in order to adjust the acid and / or alkali inlet as a function of actual values of the pH values of the liquid contained in the two partial containers of predetermined pH setpoints.
  • FIG. 2 is a plan view in the direction of arrow II of FIG. 1,
  • FIG. 3 shows a vertical longitudinal section along the line III-III in FIG. 2,
  • FIG. 4 shows a perspective view of a preferred embodiment of a drainage device
  • FIG. 5 shows a vertical cross section through an electrolysis device according to the invention along the line V-V in FIG. 2 and
  • FIG. 6 shows a side view of the electrolysis device in the direction of arrow VI according to FIG. 5.
  • a device according to the invention for treating (cleaning) waste water containing pollutants in particular consists of a trough-like, elongated container 2 with a bottom 4, two longitudinal side walls 6 and 8 and two end walls 10 and 12.
  • the container 2 is preferably made of a fiber-reinforced plastic (eg GRP) and is therefore chemical-resistant (acid-proof) and corrosion-free.
  • the walls 6 to 12 preferably have stiffening ribs 14.
  • a vertical diving wall 16 parallel to the end wall 10 in the vicinity of the one end wall 10 inside the container 2 there is a vertical diving wall 16 parallel to the end wall 10, the lower edge of which forms an opening 18 above the bottom 4 (see in particular FIG. 3). Furthermore, an intermediate wall 20 parallel to these is arranged approximately in the central region between the end wall 10 and the diving wall 16.
  • a first partial container 22 is formed between the end wall 10 and the intermediate wall 20 and a second partial container 24 is formed between the intermediate wall 20 and the immersion wall 16.
  • An inlet 26 for the contaminated liquid to be processed opens into the first partial container 22 .
  • the two sub-containers 22, 24 are connected to one another by an overflow 28, which can be formed by the upper edge of the intermediate wall 20 which is arranged lower than the upper edge of the walls 6 to 12 and the upper edge of the diving wall 16.
  • the opening 18 simultaneously forms an outlet of the second sub-container 24 and an inlet opening for the actual container interior 30.
  • a mixing device in particular in the form of a tube or pipe fan 32, is arranged within each sub-container 22, 24. This is in comparison to mechanical ones, for example driven by an electric motor Mixing devices are advantageous in that very large pollutant flakes are retained (which would otherwise be destroyed by mechanical agitators), because the larger the flakes are, the better they are subsequently separated.
  • an acid inlet 34 opens into the first partial container 22 and an alkali inlet 36 into the second partial container 24.
  • an electrolysis device 38 is now arranged within the container 2 or the interior 30 such that it flows vertically from bottom to top, i.e. from the liquid flowing in the direction of the arrow 40 (see FIG. 3) through the inlet opening 18. is flowed through in the direction of arrow 42.
  • this electrolysis device 38 including all the necessary connections, is advantageously arranged completely below the level of the liquid in the container 2, as a result of which particularly good explosion protection is achieved by avoiding sparking caused by discharges.
  • the electrolysis device 38 in the preferred embodiment of the invention consists of two electrolysis units 38a, 38b detachably held in the container 2, which are arranged side by side between the side walls 6 and 8 and bear against the baffle 16 (see Fig. 3).
  • each electrolysis unit 38a, b has a housing-like holder 52 for an anode / cathode arrangement 54.
  • the holder 52 has a horizontal, in the state inserted into the container 2 (Fig. 3) approximately at the level of the lower edge of the baffle 16 floor 56 and two vertically extending, mutually parallel, opposite end walls 58, with their edges facing the baffle 16 lie against it, so that the holder 52 is essentially closed in this vertical direction by the baffle 16.
  • a vertical intermediate wall 60 extends centrally between the end walls 58.
  • This intermediate wall 60 forms a holding wall for a cathode 62, which in the preferred embodiment consists of two individual plates 64, which are held on both sides of the holding wall 60, in particular made of stainless steel.
  • An anode 66 is arranged on both sides of this cathode 62, each anode 66 being formed by a plurality of plates 68, which are made of aluminum and are parallel to one another and in vertical planes lying perpendicular to the cathode 62.
  • the bottom 56 of the holder 52 has a slot-shaped inlet opening 70 for the liquid, and in its upper area the holder 52 is preferably designed to be completely open for the liquid to exit.
  • a further wall 71 (FIG.
  • the holder 52 is arranged in the container 2 in such a way that the inlet opening 18 merges into the inlet openings 70.
  • the anodes 66 are expediently held in the holder 52 so as to be adjustable in relation to the cathode 62 in order to adjust the electrode spacing.
  • the plates 68 of each anode 66 are connected to one another in the upper and lower region of their edges facing away from the cathode 62 via connecting rods 72.
  • Threaded rods 74 are fastened to these connecting rods 72, which engage in adjusting nuts 76, which in turn are guided in holding profiles 78 with a U-shaped cross section.
  • These holding profiles 78 extend parallel to the intermediate wall 60 between the end walls 58 of the holder 52.
  • the electrode spacing can be adjusted manually or by means of a motor, not shown, by means of a drive motor.
  • the holder 52 expediently consists of a fiber-reinforced plastic, and the parts 72, 74, 76 and 78 which hold the anodes 66 or their plates 68 adjustably also consist of an insulating material, in particular of PVC.
  • the skimming device 44 has at least one liquid arranged above the container 2 transversely to the longitudinal extent of the container and vertically immersed in the floating layer 46 and preferably slightly in the liquid arranged below it.
  • Appropriate scraper 80 which is movably guided in particular by a motor in the direction of a drainage channel 82 arranged upstream of the liquid overflow 48 for the floating layer 46.
  • two such wipers 80 are fastened to rotating drive elements 84, for example chains, which rotate in the direction of the arrows 86 shown in FIG.
  • transverse walls 92 extend between the side walls 6, 8, each parallel to one another and to the end walls 10, 12 are arranged and are spaced with their upper and lower edges from the upper edge of the side walls 6, 8 and from the bottom 4.
  • These transverse walls 92 serve to calm the liquid flowing inside the container 2, which reduces the flotation, i.e. the separation of the pollutants favors, as well as for the mechanical stiffening of the container 2. It is also expedient if the bottom 4 is divided into several sections, each of which has a gradient to the horizontal in different directions.
  • the container 2 has 4 drain valves 94 at the lowest points of the bottom (FIGS. 1 and 2). This configuration facilitates a complete emptying of the container 2 if it e.g. should be required for cleaning purposes.
  • the electrolysis device already described above 38 in particular directly upstream partial containers 22 and 24 are part of a device 96 for the chemical precipitation of pollutants.
  • This device 96 also includes a pH value regulating device 98 which, according to the invention, depending on the actual values of the pH values of the liquid contained in the two partial containers 22, 24, the acid feed 34 and / or the alkali feed 36 regulated by corresponding, not shown valves for setting predetermined pH setpoints.
  • Each partial container 22, 24 is equipped with a corresponding sensor or sensor for recording the actual pH values. The detection of the actual values and the active actuation of the valves of the inlets 34, 36 are indicated in FIG. 3 by dashed lines.
  • a final pH value control device 100 which, in the event of deviations in the actual value of the pH value of the processed liquid which runs off via the overflow 48, from a predetermined pH setpoint range, in particular 6 to 9, or in the event of deviations from a specific target value, in particular the neutral value 7, triggers an alarm message and / or switches off the entire device.
  • This drainage device 102 consists of a filter container 104, the bottom 106 and walls 108 of which consist of a filter material 110 (indicated by hatching in FIG. 4), in particular a filter fabric.
  • a support or frame construction that is not recognizable in FIG. 4 is expediently covered with the filter material 110.
  • a plurality of tubular or shaft-like filter inserts 112 are arranged in a vertical arrangement on the floor 106 within the filter container 104. The walls of these filter inserts 112 are also formed from the filter material 110.
  • the horizontal distance A of the filter inserts 112 from one another and from the walls 108 of the filter container 104 is a maximum of 50 to 60 cm. This is advantageous in that the skimmed pollutant has a so-called "drainage radius" of only approx. 30 cm. This means that water can only get out of the mud over a distance of about 30 cm.
  • the filter inserts 112 advantageously achieve that the sludge can be completely dewatered and aerated even in large quantities of up to several, for example 1 to 2 cubic meters. For emptying, it is advantageous to fasten the filter container 104 to a holder via a pivot bearing 114 so that it can be pivoted in such a way that the container 104 can be tipped out in a simple manner.
  • the liquid to be cleaned which is contaminated with pollutants, in particular wastewater from industrial plants or from scrapyards, is collected in a collecting basin (not shown) and from here by means of a pump (also not shown) via the inlet 26 into the first partial container 22 of the device 96 promoted for chemical treatment.
  • the pH of the wastewater is reduced to about 3 by adding, in particular, sulfuric acid via the acid feed 34.
  • the fluid with the acid is swirled intensively by the tube or tube fan 32.
  • the liquid then passes via the overflow 28 into the second partial container, in which the pH is raised again to 7 (neutral) by adding, in particular, sodium hydroxide solution via the alkali inlet 36.
  • the pH value is regulated via the regulating device 98, which controls the corresponding metering valves for the acid and alkali supply.
  • the regulating device 98 controls the corresponding metering valves for the acid and alkali supply.
  • the waste water flows through the opening 18 into the electrolysis device 38 and in it in the direction of arrows 42 vertically from the bottom up.
  • gas bubbles are generated electrolytically, on which the pollutant particles accumulate and are thus transported upwards.
  • the pollutant particles are indicated by dots in FIG. 3. In this way, the skimmable floating layer 46 is formed on the liquid surface.
  • a final pH value check is carried out via the device 100, which detects the respective actual pH value and, in the event of deviations from a desired value, in particular the neutral value 7, or from a desired value range, in particular 6 to 9 Triggers alarm and / or switches off the entire device. This prevents wastewater with an incorrect pH value from entering the sewage system or being reused.
  • the skimmed pollutant is then filled into the dewatering device 102 (see FIG. 4). Extensive dewatering of the sludge is achieved here through the filter material 110. Depending on the duration of the storage, almost complete drying out can be achieved. This produces a dry substance which, owing to its heavy metal and hydrocarbon content, is expediently burned in a hazardous waste incineration plant.
  • the water dripped from the filter container 104 or the dewatering device 102 is preferably fed again to the first sub-container 22.
  • the invention provides an extremely effective preparation (cleaning) of liquids, in particular of Wastewater achieved, and for the first time it has also been possible to effectively separate PCB and PAH components. Due to the dewatering of the pollutant sludge, the amount of pollutant to be disposed of as special waste (combustion) is advantageously only about 2 ° / 00 (2 per mille) of the liquid originally obtained, so that the costs to be paid for the special waste disposal are just ⁇ if significantly lower.

Abstract

Un procédé et un dispositif servent à traiter des liquides pollués, notamment des eaux usées contenant des polluants. On génère par électrolyse des bulles de gaz dans le liquide et on enlève les particules de polluants qui adhèrent à celles-ci et qui s'accumulent ainsi à la surface du liquide. Le dispositif comprend un récipient (2) de liquide, ainsi qu'une installation électrolytique (38) traversée par un courant de fluide et comprenant un agencement (54) à anodes et à cathodes. L'installation électrolytique (38) est située à l'intérieur du récipient (2) de sorte que le liquide qui y pénètre par un orifice d'admission (18) traverse verticalement l'installation électrolytique (38) de bas en haut, c'est-à-dire dans le sens de l'ascension des bulles de gaz. On obtient ainsi une efficacité de traitement particulièrement élevée.
PCT/EP1991/001539 1991-08-14 1991-08-14 Procede et dispositif de traitement de liquides pollues WO1993004003A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP1991/001539 WO1993004003A1 (fr) 1991-08-14 1991-08-14 Procede et dispositif de traitement de liquides pollues

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1991/001539 WO1993004003A1 (fr) 1991-08-14 1991-08-14 Procede et dispositif de traitement de liquides pollues

Publications (1)

Publication Number Publication Date
WO1993004003A1 true WO1993004003A1 (fr) 1993-03-04

Family

ID=8165603

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1991/001539 WO1993004003A1 (fr) 1991-08-14 1991-08-14 Procede et dispositif de traitement de liquides pollues

Country Status (1)

Country Link
WO (1) WO1993004003A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996015989A1 (fr) * 1994-11-18 1996-05-30 Hls-Elektroautomatiikka Oy Appareil de separation du floc
US6086732A (en) * 1994-11-18 2000-07-11 Bcde Group Waste Management Ltd Oy Flock separating apparatus
ES2272182A1 (es) * 2005-10-03 2007-04-16 Novoltec Automatizacion, S.A. Procedimiento de depuracion de los residuos de la fabricacion de aceite de oliva.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH519444A (de) * 1970-06-02 1972-02-29 Oesterr Alpine Montan Verfahren zur Reinigung von Abwässern
FR2292670A1 (fr) * 1974-11-26 1976-06-25 Valanti Pentti Procede et appareil pour purifier des emulsions et des eaux polluees
DE2627964A1 (de) * 1976-06-23 1978-01-05 Juergen Krampitz Verfahren und vorrichtung zum reinigen von waessrigen fluessigkeiten
FR2382941A1 (fr) * 1977-03-10 1978-10-06 Courtaulds Ltd Procede de separation de particules solides d'un liquide aqueux par electroflottaison et appareil pour la mise en oeuvre dudit procede
EP0402737A2 (fr) * 1989-06-16 1990-12-19 Siebtechnik Gmbh Procédé et dispositif pour le traitement de boues contenant des métaux lourds
DE9108712U1 (fr) * 1990-08-01 1991-12-05 Iwatech Konrad Gmbh, 5600 Wuppertal, De

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH519444A (de) * 1970-06-02 1972-02-29 Oesterr Alpine Montan Verfahren zur Reinigung von Abwässern
FR2292670A1 (fr) * 1974-11-26 1976-06-25 Valanti Pentti Procede et appareil pour purifier des emulsions et des eaux polluees
DE2627964A1 (de) * 1976-06-23 1978-01-05 Juergen Krampitz Verfahren und vorrichtung zum reinigen von waessrigen fluessigkeiten
FR2382941A1 (fr) * 1977-03-10 1978-10-06 Courtaulds Ltd Procede de separation de particules solides d'un liquide aqueux par electroflottaison et appareil pour la mise en oeuvre dudit procede
EP0402737A2 (fr) * 1989-06-16 1990-12-19 Siebtechnik Gmbh Procédé et dispositif pour le traitement de boues contenant des métaux lourds
DE9108712U1 (fr) * 1990-08-01 1991-12-05 Iwatech Konrad Gmbh, 5600 Wuppertal, De
EP0469582A1 (fr) * 1990-08-01 1992-02-05 IWATECH KONRADT GmbH Procédé et dispositif pour le traitement d'eaux polluées

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996015989A1 (fr) * 1994-11-18 1996-05-30 Hls-Elektroautomatiikka Oy Appareil de separation du floc
AU688410B2 (en) * 1994-11-18 1998-03-12 Bcde Group Waste Management Ltd Oy Flock separating apparatus
US5888359A (en) * 1994-11-18 1999-03-30 Hls-Elektroautomatiikka Oy Flock separating apparatus
US6086732A (en) * 1994-11-18 2000-07-11 Bcde Group Waste Management Ltd Oy Flock separating apparatus
NO317206B1 (no) * 1994-11-18 2004-09-20 Bcde Group Waste Man Ltd Oy Flokkulerings-separasjonsapparat
ES2272182A1 (es) * 2005-10-03 2007-04-16 Novoltec Automatizacion, S.A. Procedimiento de depuracion de los residuos de la fabricacion de aceite de oliva.

Similar Documents

Publication Publication Date Title
DE2753064C2 (de) Verfahren zum kontinuierlichen Reinigen einer eine hohe Fremdstoffkonzentration aufweisenden Flüssigkeit
DE4339268C2 (de) Verfahren und Vorrichtung zum Ausfiltern und Rückspülen von Feststoff-Partikeln aus Flüssigkeiten
DE2743963C2 (de) Vorrichtung zum Abscheiden von Stoffen aus verunreinigtem Wasser
EP0148444A2 (fr) Procédé et dispositif de séparation d'un mélange huile-eau
DE3031412A1 (de) Vorrichtung zum nachklaeren von abwasser
DE3338171A1 (de) Verfahren und vorrichtung zum trennen von emulsionen bzw. abtrennen von feststoffen aus einer suspension aus feststoffen und einer fluessigkeit mittels druck- bzw. turbo flotation
EP0248429A2 (fr) Procédé d'extraction de composés organiques de l'eau
DE2904326B2 (de) Verfahren und Vorrichtung zum Deinken von Faserstoffsuspensionen
DE3031773A1 (de) Anlage zur elektrochemischen schmutzwasserreinigung
DE4128843C2 (de) Auswaschbarer filter
DE2402250A1 (de) Vorrichtung zum entmischen einer mischfluessigkeit unter ausnutzung unterschiedlicher dichtewerte
EP0469582B1 (fr) Procédé et dispositif pour le traitement d'eaux polluées
DE2810090A1 (de) Verfahren und vorrichtung zur trennung von festteilchen aus waessrigen fluessigkeiten mittels elektroflotation
DE3124556C2 (de) Verfahren zum Betrieb eines Leichtflüssigkeitsabscheiders für Abwasser und Leichtflüssigkeitsabscheider zu seiner Durchführung
DE4402185A1 (de) Verfahren und Vorrichtung zum Reinigen von Entfettungsmitteln
DE2837554C2 (de) Leichtflüssigkeitsabscheider
EP0569841B1 (fr) Dispositif de séparation de particules de cire de l'eau de circulation d'une cabine de pulvérisation
WO1993004003A1 (fr) Procede et dispositif de traitement de liquides pollues
EP0685431A2 (fr) Procédé et dispositif pour la séparation des sédiments à partir des eaux usées
DD275856B5 (de) Koaleszenzabscheider
DE1917806B2 (de) Vorrichtung zum Ausscheiden von öl aus einem Öl-Wasser-Gemisch
EP0657195A1 (fr) Séparateur des boues et d'huile
DE4231790A1 (de) Verfahren und Vorrichtung zum Aufbereiten von Abwässern
DE3207658A1 (de) Verfahren und vorrichtung zur abtrennung von sand und schlamm aus abwaessern
DE1442452A1 (de) Apparat zum Ausscheiden von Teilchen aus Fluessigkeiten

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU BG BR CA CS FI HU JP KR MC NO PL RO SU US

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
NENP Non-entry into the national phase

Ref country code: CA