DE2306178A1 - Processing and filtering waste water - using granulated or ground foamed polyurethane as flotation agent or as filtering auxiliary - Google Patents

Processing and filtering waste water - using granulated or ground foamed polyurethane as flotation agent or as filtering auxiliary

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Publication number
DE2306178A1
DE2306178A1 DE2306178A DE2306178A DE2306178A1 DE 2306178 A1 DE2306178 A1 DE 2306178A1 DE 2306178 A DE2306178 A DE 2306178A DE 2306178 A DE2306178 A DE 2306178A DE 2306178 A1 DE2306178 A1 DE 2306178A1
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DE
Germany
Prior art keywords
filtering
flotation agent
polyurethane
waste water
flotation
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.)
Pending
Application number
DE2306178A
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German (de)
Inventor
Auf Nichtnennung Antrag
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Individual
Original Assignee
Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to DE2306178A priority Critical patent/DE2306178A1/en
Publication of DE2306178A1 publication Critical patent/DE2306178A1/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03DFLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00Flotation
    • B03D1/001Flotation agents
    • B03D1/004Organic compounds
    • B03D1/016Macromolecular compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03DFLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00Flotation
    • B03D1/02Froth-flotation processes
    • B03D1/023Carrier flotation; Flotation of a carrier material to which the target material attaches

Landscapes

  • Water Treatment By Sorption (AREA)
  • Physical Water Treatments (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

Flotation agent consisting of opt. granulated or finely ground foamed polyurethane is used in waste water processing and clarifying and also acts as a filtering auxiliary in waste water filtering. The foamed polyurethane has adsorptive capacity for C cpds. including oils and fats and is capable of transporting all pollutants to water surface. It may be used together with dissociation agent, e.g. acids, Fe2(SO4), Al2(SO4)3 and/or flocculants and/or pH regulators and may be replaced by foamed phenol resin or by foamed polystyrene.

Description

" Flotationsmittel aus Polyurethan Die Flotation ist als liufbereitungcverfahren vor allem in der Hüttentechnik bekannt, Als Flotationsmittel finden dort z.B. Alkoholsulfate, salze von Fettsäuren, Holzteeröle ect. Verwendung. Als Flotationsbas wird Luft verwendet Auch finden als Flotationsmittel sogenannte Flotationsschäumer, z.3. Kresole Verwendung, die einen besonders schnell zerfallenen schaum bilden. "Flotation agent made of polyurethane Flotation is used as a purification process mainly known in metallurgical engineering, e.g. alcohol sulfates are found there as flotation agents, salts of fatty acids, wood tar oils ect. Use. Air is used as the flotation base So-called flotation frothers, e.g. 3. Cresol usage, which form a foam that disintegrates particularly quickly.

In der Abwassertechnik erden neben mechanischer Abwasserbehandlung und Flockungsmittel vor allem Fällungsmittel verwandt.In wastewater engineering, in addition to mechanical wastewater treatment, grounding and flocculants mainly related to precipitants.

Die aus dem Abwasser zu entfernenden Fremdstoffe werden sedimentiert.The foreign matter to be removed from the wastewater is sedimented.

Jenen des höheren spezifischen Gewichtes der meisten ochMutzstoffe und der zu Ver--endung kommenden oft hochmolekularen Flockungsmittel als liasser, erfolgt die Sedimentation. Hingegen frei gesetzte Öle steinen zur Wasseroberfläche auf Andere Stoffe wieder verbleiben schwebend in einer mittleren Phase Eine eindeutige Trennung von Wasser und Schmutzstoffe erfolgt in den meisten Fällen nicht, oder erst nach sehr langen Jtandzeiten von zei bis acht Stunuen, in manchen Fällen bis vierundzwanzig Stunden.Those of the higher specific gravity of most of the pollutants and the high-molecular flocculants that often end up as a liquid, sedimentation takes place. In contrast, released oils stone the surface of the water on other substances again remain floating in a middle phase A clear one Separation of water and pollutants does not take place in most cases, or only after very long periods of ten to eight hours, in some cases up to Twenty-four hours.

Der Erfindung liegt die Aufgabe zugrunde, ein Flotationsmittel zu schaffen, dass zum einen adsorbtive Kräfte besitzt, zum anderen besonders in der Abwasseraufbereitungstechnik eingesetzt werden kann, dabei aber biologisch unbedenklich ist0 Auch soll die Flotation sehr rasch geschehen, ohne daß zusätzlich ein Flotationsgas verwendet wird0 Es wird mit dieser Erfindung vorgeschlagen, geschäumtes Polyurethan als Flotationsmittel einzusetzen0 Der Polyurethanschaum wird gemahlen. Durch die feine Körnung vergrößert sich die adsorbtive Oberfläche0 Es werden besonders gut Kohlenstoffverbindungen adsorbiert0 Bei seinem Je: zur Jasseroberfläche belädtsich das vorgeschlagene Flotationsmittel mit den im Wasser enthaltenen chmutzstoffen, Es ist also in der Lage,spezifisch leichtere, gleiche und spezifisch schwerere Stoffe als Wasser gemeinsam zur Wasseroberflohe zu transportieren.The invention is based on the object of providing a flotation agent create that on the one hand has adsorbing forces, on the other hand especially in the Sewage treatment technology can be used, but biologically harmless ist0 The flotation should also take place very quickly without the need for an additional flotation gas It is proposed with this invention, foamed polyurethane to be used as a flotation agent0 The polyurethane foam is ground. Through the fine grain size increases the adsorbent surface0 It will be particularly good Carbon compounds adsorbed0 At his Je: to the surface of the Jasser the proposed flotation agent is loaded with the pollutants contained in the water, It is therefore capable of specifically lighter, identical and specifically heavier substances to transport water together to the water flea.

Werden gleichzeitig FlockunCshilfsmittel eingesetzt, so lagern sich diese sowohl an den Scmutzstoffen als auch an den Polyurethanteilchen an und schaffen damit eine Verbindung0 Die Schmutzstoffe werden vom Polyurethan also regelrecht in Schlepp genommen Öle und Fette und eine Vielzahl von Kohlestoffverbindungen dabei sogar adsorbiert0 Das Polyurethan dient zur Unterstützung der Abwasseraufbereitungsverfahren.If flocculants are used at the same time, they will accumulate this on both the dirt and the polyurethane particles and create with it a connection0 The pollutants are thus literally made by the polyurethane Taken in tow with oils and fats and a multitude of carbon compounds even adsorbed0 The polyurethane is used to support wastewater treatment processes.

Der Zeitpunkt der Zugabe des Folyurethansin das Abwasser kann jeder Zeit erfolgen.Everyone can decide when to add the polyurethane to the wastewater Time.

Das Polyurethan ist im wasser fast unbegrenzt schwimmfähig.The polyurethane floats almost indefinitely in water.

In Gegenfahrt von Tensiden verliert es allerdings seine Schwimmfähigkeit von innerhalb 24 Stunden0 5 kann sowohl vor der Zugabe anderer Chemikalien oder mit denen gemeinsam oder nachfolgend in das Abwasser eingerührt werden, Entscheident ist, daß dieses Flotationsmittel mit allen im Abwasser enthaltenen, zu flotierenden Teilchen während des Rührvorganges in direkte oder über Flockungsmittel in indirekte Berührung kommt, Die Zugabe des Polyurethans in das Abwasser, zusammen mit den geeigneten Spaltmitteln, zusammen mit den basischen oder alkaliscllen Chemikalien zur pH- fertregulierung, zusammen mit den Flockungsmitteln (kationaktiven, anionaktiven oder Nichtionogenen) hat sich experimentell entgegen aller Erwartungen bewährt, Es zeigte sich, daß Polyurethan sich hier auch als Träger der Chemikalien zur Abwasserbehandlung anbietet, Durch seine adsorbtiven Eigenschaften kann es begrenzt auch als Flockungsmittel angesprochen werden.However, when the surfactants travel in the opposite direction, it loses its buoyancy within 24 hours0 5 can both before the addition of other chemicals or with which are stirred into the wastewater jointly or subsequently, decision-maker is that this flotation agent with all contained in the wastewater to be floated Particles during the stirring process in direct or via flocculants in indirect Contact comes, The addition of the polyurethane to the sewage, along with the appropriate Breakdown agents, together with basic or alkaline chemicals for pH down regulation, together with the flocculants (cationic, anionic or nonionic) has proven itself experimentally against all expectations. It was found that polyurethane also offers itself here as a carrier of chemicals for wastewater treatment, by its adsorbing properties can also be addressed as a flocculant to a limited extent will.

Durch die Flotation gelangen alle Verschmutzungen des Abwassers an die Wasseroberfläche und können z.B. mit Skimmer leicht abgenommen werden. Das Polyurethan kann bis zur Erschöpfung seinerAdsorbtionsfähigkeit wieder' verwandt werden.All contaminants in the wastewater arrive through flotation the water surface and can easily be removed with a skimmer, for example. The polyurethane can be used again until its adsorption capacity is exhausted.

Die Klarifizierung des Abwassers mit Hilfe dieses Flotationsmittels ist so groß, daß in den meisten Fällen auf die apparativen, sehr aufwendigen und langwierigen Filterationen,verzichtet werden kann.The clarification of the wastewater with the help of this flotation agent is so large that in most cases the apparatus, very expensive and lengthy filtering operations can be dispensed with.

Der gesamte Flotationsprozess ist innerhalb 10 Minuten bis 1/2 Stunde abgeschlossen.The entire flotation process is within 10 minutes to 1/2 hour closed.

Die bisher übliche Sedimentation dagegen kann ja ie oben beschrieben bis zu 24 Stunden einnehmen.The sedimentation that has been customary up to now, on the other hand, can be described as above take for up to 24 hours.

Soll das Abwasser noch durch einen Filter laufen, so genügt hier ein grobes Filterfließ. Vorteilhaft ist auch hier die Flotation, wenn das Abwasser aus dem Behälter nch unten abgelassen wird. So durchfließt zunächst ungehindert das geklärte Abwasser z.B. 90,1 r den Filter und erst dann folgt der vom Polyurethan gebildete Flotations- oder Filterkuchen.If the wastewater is to run through a filter, one is sufficient here coarse filter flow. Flotation is also advantageous here when the wastewater is out the container is drained to the bottom. So it flows through unhindered at first clarified wastewater e.g. 90.1 r the filter and only then does that of the polyurethane follow formed flotation or filter cakes.

Die Filtrationszeit ist mit diesem Flotationsmittel lvesentlich verkürzt, gegenüber herkömmlichen Verfahrensweisen.The filtration time is significantly reduced with this flotation agent, compared to conventional procedures.

Das Polyuretiian kann auch im Filtrationsprozess als Filterhilfsmittel angesprochen erden.The polyurethane can also be used as a filter aid in the filtration process ground addressed.

Fließt z.B. das Abwasser noch bevor das Polyurethan flotiert ist, durch den Filter, so hat auch schon hier das Filtrat einen besonders hohen Reinheitsgrad,wie er zu diesem Zeitpunkt des @asseraufbereitungsverfahrens, ohne daß adsorbtiv wirkende Polyuretnan,nicht erreicht würde.For example, if the wastewater flows before the polyurethane is floated, through the filter, the filtrate has a particularly high degree of purity here too, like he at this point in the water treatment process without any adsorbing effects Polyurethane, would not be achieved.

Claims (5)

A n s p r ü c h eExpectations 1.) Flotationsmittel dadurch gekennzeichnet, daß es aus geschäumten Polyurethan besteht.1.) Flotation agent characterized in that it is made of foamed Polyurethane is made. 2.) Flotationsmittel nach Anspruch 1 dadurch gekennzeichnet, daß es gekörnt oder fein gemahlen ist.2.) flotation agent according to claim 1, characterized in that it grained or finely ground. 3.) Flotationsmittel nach Anspruch 1 dadurch gekennzeichnet, daß das Polyurethan unter gleichzeitiger Verwendung von Spaltmitteln (z.B. Säuren, Eisen (III)-sulfat, Aluminiumsulfat) oder und Flockungsmitteln, oder und Chemikalien zur pH-Wertregulierung in Abwasser zur Aufbereitung verwendet wird.3.) flotation agent according to claim 1, characterized in that the Polyurethane with the simultaneous use of splitting agents (e.g. acids, iron (III) sulfate, aluminum sulfate) or and flocculants, or and chemicals for pH regulation in wastewater is used for treatment. 4.) Flotationsmittel nach Anspruch 1-3 dadurch gekennzeichnet, daß anstelle von geschäumten Polyurethan geschäumtes Phenolharz verwendet wird.4.) flotation agent according to claims 1-3, characterized in that instead of foamed polyurethane foamed phenolic resin is used. 5.) Flotationsmittel nach Anspruch 1-3 dadurch gekennzeichnet, daß anstelle von Polyurethan geschäumtes Polystyrol verwendet wird.5.) flotation agent according to claims 1-3, characterized in that instead of polyurethane foamed polystyrene is used.
DE2306178A 1973-02-08 1973-02-08 Processing and filtering waste water - using granulated or ground foamed polyurethane as flotation agent or as filtering auxiliary Pending DE2306178A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2306178A DE2306178A1 (en) 1973-02-08 1973-02-08 Processing and filtering waste water - using granulated or ground foamed polyurethane as flotation agent or as filtering auxiliary

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2306178A DE2306178A1 (en) 1973-02-08 1973-02-08 Processing and filtering waste water - using granulated or ground foamed polyurethane as flotation agent or as filtering auxiliary

Publications (1)

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DE2306178A1 true DE2306178A1 (en) 1974-08-15

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4055490A (en) * 1975-06-24 1977-10-25 Seisuikogyo Co., Ltd. Activated sludge process
DE2939813A1 (en) * 1979-08-29 1981-04-02 BBC AG Brown, Boveri & Cie., Baden, Aargau FLOTATION METHOD FOR WASTEWATER PURIFICATION

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4055490A (en) * 1975-06-24 1977-10-25 Seisuikogyo Co., Ltd. Activated sludge process
DE2939813A1 (en) * 1979-08-29 1981-04-02 BBC AG Brown, Boveri & Cie., Baden, Aargau FLOTATION METHOD FOR WASTEWATER PURIFICATION
US4311595A (en) * 1979-08-29 1982-01-19 Bbc, Brown, Boveri & Company, Limited Flotation process for purification of waste water

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