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WO1987002595A1 - Procede d'epuration d'eau et utilisation de celui-ci - Google Patents

Procede d'epuration d'eau et utilisation de celui-ci Download PDF

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Publication number
WO1987002595A1
WO1987002595A1 PCT/SE1986/000500 SE8600500W WO8702595A1 WO 1987002595 A1 WO1987002595 A1 WO 1987002595A1 SE 8600500 W SE8600500 W SE 8600500W WO 8702595 A1 WO8702595 A1 WO 8702595A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
waste
means according
filter cloth
purification
Prior art date
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.)
Ceased
Application number
PCT/SE1986/000500
Other languages
English (en)
Inventor
Hans Eriksson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO1987002595A1 publication Critical patent/WO1987002595A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/04—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are impervious for filtering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
    • B01D33/463—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
    • B01D33/466—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element scrapers

Definitions

  • the present invention relates to a means for purifying water in sewage disposal plants, certain washing facilities or other facilities where water or some other liquid is polluted by particles and/or oil.
  • a plant for purifying waste water comprises one or more purification steps. Purification may be carried out by mechanical, biological and/or chemical means. Before reaching these steps the waste water generally passes through a course grid to remove any large particles. An aerated sand trap follows, where sedimentation of heavier particles occurs and these are removed mechanically, usually by means of scrapers and pumps. Sedimentation also occurs in subsequent basins, after which organic sub ⁇ stances are broken down by oxidation with oxygen from the air and bac ⁇ terial activity. Chemicals may be added as nutrient for bacteria cultures and to cause flocculation.
  • a sewage disposal plant is usually dimensioned for 4-5 times the normal quantity of water.
  • oil- which has become lodged in the drainage system may be released.
  • Oil spills due to some other cause seem to occur in municipal wastewater treatment plants on average about once or twice a year.
  • Oil in sufficient quan ⁇ tities can put the biological purification system out of function for up to a month. If the quantity of water exceeds the capacity of the plant, unpurified water is released to the receiver, which is a drawbac if this has low capacity.
  • oil released from the wastewater system has been known to incur expensive clearance efforts over vast expanses of water.
  • the means In relation to the space it requires, and its cost, the means has a large capacity. It can be applied in an overflow channel in the event of considerable quantities of water, thus enabling the wastewater exceeding the plant capacity to also be cleaned to a considerable extent.
  • the means according to the present invention comprises a continuous filter oloth movable in a substantially vertical plane, inclined in the direction of flow of the wastewater.
  • the waste filtered from the liquid and remaining on the filter cloth is transported upwardly out of the water and removed at the upper end of the device.
  • Figure 1 is a block diagram showing the purification steps in a con ⁇ ventional wastewater disposal plant and Figure 2 shows a means according to the invention.
  • FIG 1 shows the flowchart for a conventional purification plant, the arrows 20, 30, 40, 50 and 60 showing through-flow of the water.
  • a waste- water disposal plant may consist of one or more of the blocks shown in Figure 1.
  • the wastewater first passes a course grid and sand trap 22, where solid particles down to a certain size are removed depending on the dimensions of the grid opening.
  • the water 30 then passes sedimentation basins 32.
  • the water 40 is cleaned by biological means 42. Oxygen from the air is added as shown by the arrow 41, and sludge is removed at 43. Part of the sludge 43 is returned through pipe 44 to the biological cleaning step 42 in order to return the bacteria cultures.
  • the water 50 leaving this stage is purified by means of flocculation, using chemicals and sedimentation 52.
  • the arrow 51 indicates the addition of chemicals.
  • the sludge 53 is separated off and the purified water 60 can be re-used or supplied to a receiver.
  • FIG. 2 shows the means 1 according to the invention, for purifying wastewater A.
  • the means 1 consists of a continuous filter cloth 2 which moves clockwise in a vertical plane in a channel having vertical sides and a horizontal bottom.
  • the filter cloth rests on rollers 6,7,8,9 . or metal rods in a frame which can be lifted out of the water, and is driven by a roller above the water.
  • the filter cloth 2 is deflected so as to form an upper part moving in upward direction, an upper part moving in downward direction and a lower part moving in downward direction.
  • the lower, downwardly moving part may be divided into several sections as is indi ⁇ cated by the roller 9.
  • the upwardly moving part of the filter cloth 2 is inclined in the direction of flow of the water.
  • the type of means normally used for such filters are provided to control its tension prevent imbalance. If necessary rubber seals may rest on the filter to form a seal between the filter and the bottom and sides of the channel. Any sludge remaining on the filter can be removed by a scraper 3 and/or nozzles 4 for pressurized air or water directed towards the clean side of the filter.
  • the sludge removed from the filter falls down onto a conveyor 12 moving transversely to the filter cloth, preferably a conveyor consisting of the same type of filter cloth as the inclined filter cloth. The sludge is thus drained at the same time.
  • the rinsing water is collected in a trough located below the conveyor and is returned to the channel upstream of the purification means, or continues to the next purification step.
  • the sludge is carried further for processing.
  • the filter cloth dimen- sions, the mesh size, inclination and speed of travel of the cloth, the latter preferably being variable, should be adjusted to the quantity of water, the concentration and nature of the contaminants in the waste ⁇ water, pressure drop and the degree of purity required for the water leaving the means.
  • the wastewater A is supplied on top of the upper part of the upwardly moving filter cloth 2. Sludge is deposited on the filter cloth 2 and when the sludge on the filter reaches the upper, downwardly moving portion, it is scraped off by the scraper 3. The sludge scraped off is then treated in a special arrangement.
  • the scraper 3 may be located at some other point along the filter cloth. However, it is preferable for it to be located at a raised part of the means 1, i.e. to the right in Figure 2. After the scraping means, water or possibly an organic solution is lushed through the cloth 2 from the uncoated side, from nozzles 4.
  • the nozzle arrangement 4 is preferably located at the downwardly moving, lower por ⁇ tion of the cloth 2.
  • the cloth 2 is dimensioned to deal with a predetermined quantity of sludge, estimated by calculation.
  • "Sludge” is used here in its widest sense and may cover inorganic or organic waste.
  • the cloth may be up to 15 m in width, but in most cases a width of one or two meters is suffi ⁇ cient. For small quantities of water, for instance from automobile washing facilities, cloth widths of less than a meter may be suitable.
  • the mesh, wire dimension and weave should be suited to the composition of the wastewater and the required degree of purification. Examples of
  • 2 standard mesh sizes are 0.5-2 mm .
  • the wire dimension may be varied.
  • the filter cloth may also be in two layers. It should preferably be made of synthetic fibres since oil and biological substances adhere better than to metal. This type of cloth can also be used for polluted liquids consisting of or containing acid or lye.
  • a filter cloth according to the invention treats the contaminating particles gently so that they are not disintegrated, thus achieving efficient purification of the wastewater.
  • the means according to the invention may constitute a separate purifi ⁇ cation unit for cleaning wastewater from automobile workshops, automobile washing facilities and other industrial applications.
  • the means may also form part of a sewage disposal plant, for instance, where it may replace or supplement one or more cleansing steps. It preferable replaces the mechanical cleansing step, i.e. the step designated 32 in Figure 1. Besides the above-mentioned advantages of the means according to the invention, its superior ability to deal with oily waste should also be emphasized.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Water Treatment By Sorption (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Biological Treatment Of Waste Water (AREA)

Abstract

Les usines d'épuration des eaux usées exigent beaucoup de place et sont coûteuses car le temps de transit est long et des ressources importantes sont nécessaires pour éliminer les sédiments. L'invention prévoit un moyen d'épuration (1) sous forme d'une toile de filtrage continue qui ramasse les particules et l'huile au-dessus d'un certain seuil de viscosité. Elle permet de remplacer les moyens mécaniques utilisés actuellement, réduisant ainsi les coûts encourus par une usine de traitement des eaux usées. Le moyen d'épuration (1) remplace ou simplifie l'une ou plusieurs des étapes d'épuration.
PCT/SE1986/000500 1985-10-31 1986-10-31 Procede d'epuration d'eau et utilisation de celui-ci Ceased WO1987002595A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8505141A SE8505141L (sv) 1985-10-31 1985-10-31 Anordning vid vattenrening
SE8505141-5 1985-10-31

Publications (1)

Publication Number Publication Date
WO1987002595A1 true WO1987002595A1 (fr) 1987-05-07

Family

ID=20361974

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1986/000500 Ceased WO1987002595A1 (fr) 1985-10-31 1986-10-31 Procede d'epuration d'eau et utilisation de celui-ci

Country Status (5)

Country Link
EP (1) EP0243441A1 (fr)
AU (1) AU6593586A (fr)
ES (1) ES2002908A6 (fr)
SE (1) SE8505141L (fr)
WO (1) WO1987002595A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29611811U1 (de) * 1996-07-06 1996-09-12 SCHÜTT GmbH & Co. Umwelt Engineering KG, 36169 Rasdorf Filtrationsanlage
DE19727984A1 (de) * 1997-07-01 1999-01-07 Henning Marschler Vorrichtung zum Entfernen von Schwimmschlamm aus Abwasser-Klärbecken
WO2013112060A1 (fr) 2012-01-27 2013-08-01 Columbeanu Ion Liant hydraulique à base de sulfate de calcium, procédé de production de ce dernier et applications spécifiques associées

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3508659A (en) * 1969-04-02 1970-04-28 Us Interior Cantilevered traveling screen
DE2701759A1 (de) * 1977-01-18 1978-07-20 Akzo Gmbh Verfahren zur trennung von mischungen ineinander unloeslicher fluessigkeiten
US4191653A (en) * 1979-02-27 1980-03-04 Hampton Quentin L Self washing belt strainer
EP0108717A2 (fr) * 1982-11-05 1984-05-16 Fuchs Maschinenbau Dispositif pour nettoyer des eaux usées

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3508659A (en) * 1969-04-02 1970-04-28 Us Interior Cantilevered traveling screen
DE2701759A1 (de) * 1977-01-18 1978-07-20 Akzo Gmbh Verfahren zur trennung von mischungen ineinander unloeslicher fluessigkeiten
US4191653A (en) * 1979-02-27 1980-03-04 Hampton Quentin L Self washing belt strainer
EP0108717A2 (fr) * 1982-11-05 1984-05-16 Fuchs Maschinenbau Dispositif pour nettoyer des eaux usées

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29611811U1 (de) * 1996-07-06 1996-09-12 SCHÜTT GmbH & Co. Umwelt Engineering KG, 36169 Rasdorf Filtrationsanlage
DE19727984A1 (de) * 1997-07-01 1999-01-07 Henning Marschler Vorrichtung zum Entfernen von Schwimmschlamm aus Abwasser-Klärbecken
DE19727984C2 (de) * 1997-07-01 2000-05-04 Henning Marschler Förderband-Vorrichtung zum Entfernen von Schwimmschlamm aus Abwasser-Klärbecken
WO2013112060A1 (fr) 2012-01-27 2013-08-01 Columbeanu Ion Liant hydraulique à base de sulfate de calcium, procédé de production de ce dernier et applications spécifiques associées

Also Published As

Publication number Publication date
AU6593586A (en) 1987-05-19
SE8505141L (sv) 1987-05-01
SE8505141D0 (sv) 1985-10-31
EP0243441A1 (fr) 1987-11-04
ES2002908A6 (es) 1988-10-01

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