DE1816932C3 - Process for the purification of waste water with a flotation stage - Google Patents

Process for the purification of waste water with a flotation stage

Info

Publication number
DE1816932C3
DE1816932C3 DE1816932A DE1816932A DE1816932C3 DE 1816932 C3 DE1816932 C3 DE 1816932C3 DE 1816932 A DE1816932 A DE 1816932A DE 1816932 A DE1816932 A DE 1816932A DE 1816932 C3 DE1816932 C3 DE 1816932C3
Authority
DE
Germany
Prior art keywords
flotation
added
wastewater
purification
sludge
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.)
Expired
Application number
DE1816932A
Other languages
German (de)
Other versions
DE1816932B2 (en
DE1816932A1 (en
Inventor
Rainer Dr.-Ing. 2807 Achim Born
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
Priority to DE1816932A priority Critical patent/DE1816932C3/en
Priority to NL6919007A priority patent/NL6919007A/xx
Priority to ES374847A priority patent/ES374847A1/en
Priority to FR6944880A priority patent/FR2027060A1/en
Priority to CH1922869A priority patent/CH500140A/en
Publication of DE1816932A1 publication Critical patent/DE1816932A1/en
Publication of DE1816932B2 publication Critical patent/DE1816932B2/en
Application granted granted Critical
Publication of DE1816932C3 publication Critical patent/DE1816932C3/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1205—Particular type of activated sludge processes
    • C02F3/1215—Combinations of activated sludge treatment with precipitation, flocculation, coagulation and separation of phosphates
    • 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
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Analytical Chemistry (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Physical Water Treatments (AREA)
  • Paper (AREA)

Description

Die Erfindung bezieht sich auf ein Verfahren zur Reinigung von Abwasser mit einer Flotationssiufe für das Rohabwasser und/oder das von Grobstoff befreite Rohabwasser.The invention relates to a method for cleaning waste water with a flotation stage for the raw sewage and / or the raw sewage freed from coarse material.

Es ist schon bekannt. Eisen- oder Aluminiumhydroxydflocken als flotierbare Substanz zur Reinigung von Abwasser zu benutzen.It is already known. Iron or aluminum hydroxide flakes to use as a floatable substance for purifying wastewater.

Die Flotation von Abwasser ist grundsätzlich insbesondere aus der Papierabwasserreinigung bekannt. Der Erfindung Hegt dabei die Aufgabe zugrunde, den Flotationseffekt erheblich zu erhöhen, indem die praktisch nicht flotierbaien gelösten und kolloidalen Verschmutzungsanteile der organischen Verschmutzung mitausflotiert werden, insgesamt also ein höherer Anteil der gesamten organischen Verschmutzung durch die Flotation von dem Abwasser abgetrennt wird.The flotation of wastewater is known in particular from paper wastewater treatment. The invention is based on the object of significantly increasing the flotation effect by the practically non-floating dissolved and colloidal pollution fractions of organic pollution are also floated out, so overall a higher proportion of the total organic pollution by the flotation is separated from the wastewater.

Die Lösung dieser Aufgabe besteht darin, daß dem Abwasser als flotierbare Substanzen mit der Fähigkeit, gelöste bzw. im anschließenden kolloidalen Bereich vorliegende organische Stoffe adsorptiv zu binden, erfindungsgemäß biologisch aktiver organischer Schlamm zugesetzt wird. Dieser Schlamm zeichnet sich einerseits durch seine hohe Fähigkeit aus, gelöste bzw. kolloidal vorliegende organische Schmutzungen adsorptiv zu binden, und zum anderen ist er floiierbar.
Der gegenüber der SE-PS 2 Π 366, die die Verwendung von Aluminiumsulfat und Eisenchlorid vorsieht, erreichte technische Fortschritt ist im wesentlichen darin zu sehen, daß der in der Abwasserreinigung anfallende biologisch aktive organische Schlamm praktisch kostenlos als Flotationsmittel zur Verfugung stehtThe solution to this problem is that according to the invention biologically active organic sludge is added to the wastewater as flotable substances with the ability to adsorptively bind dissolved organic substances or organic substances present in the subsequent colloidal area. This sludge is characterized on the one hand by its high ability to adsorptively bind dissolved or colloidal organic dirt, and on the other hand it is floatable.
The technical progress achieved in relation to SE-PS 2 Π 366, which provides for the use of aluminum sulfate and ferric chloride, is essentially to be seen in the fact that the biologically active organic sludge obtained in wastewater treatment is available practically free of charge as a flotation agent

Da bei der Flotation als Trennprozeß einerseits eine Verarmung des Abwassers an Feststoffen und somit an Adsorptionsflächen stattfindet, andererseits jedoch die Adsorption in Abhängigkeit von der Zeit und den Kontaktmöglichkeiten steht, kann es erforderlich sein, den aktiven Schlamm nicht nur zu Verfahrensbeginn dem Rohabwasser zuzusetzen. Aus diesem Grunde kann es in Abweichung der in der Abwassertechnik üblichen Flotationspraxis notwendig werden, das Abwasser mehrstufig in hintereinandergeschalteten Flotationskammern zu flotieren, wobei jeder Fiotationskammer erneut biologisch aktiver organischer Schlamm zugesetzt wird. Gegebenenfalls kann dabei wenigstens ein Teil des Feststoffaustrages einer nachfolgenden Flotationskammer der vorhergehenden Flotationskammer wieder zugeleitet werden. Diese mehrstufige Flotation ist sinnvoll, um eine Verarmung des Abwassers an Feststoffen und somit an Adsorptionsflächen zu vermeiden.Since in flotation as a separation process, on the one hand, there is a depletion of the wastewater in solids and thus in Adsorption takes place, on the other hand, however, the adsorption as a function of time and the If contact is available, it may be necessary to use the active sludge not only at the start of the process to add to the raw sewage. For this reason it can deviate from what is usual in wastewater engineering Flotation practice become necessary to float the wastewater in multiple stages in flotation chambers connected in series, with each flotation chamber biologically active organic sludge is added again. If necessary, at least one Part of the solids discharge of a subsequent flotation chamber of the preceding flotation chamber be fed back. This multi-stage flotation is useful in order to prevent the wastewater from becoming impoverished Avoid solids and thus on adsorption surfaces.

Die Erfindung sieht ferner vor, daß dem Abwasser zusätzlich an sich bekannte organische und/oder anorganische Flockungshilfsmittel, insbesondere organische Polymere, zugegeben werden. Zweckmäßig werden die Flockungshilfsmittel dabei in der letzten Kammer zugegeben, in der das Abwasser schon den weitestgehendcn Reinigungsgrad erhalten hat, damit durch die Flockungshilfsmittel ein guter Restaustrag ermöglicht wird.The invention also provides that the waste water also known per se organic and / or inorganic flocculants, in particular organic polymers, are added. Appropriate the flocculants are added in the last chamber, in which the wastewater is already the has received the greatest possible degree of purification, so that the flocculation aids ensure a good residual discharge is made possible.

Es ist auch möglich, zwischen den einzelnen Flotationskammern besondere Reaktionsräume vorzusehen, in denen die Flockungshilfsmittel zugesetzt werden.
Der biologisch aktive organische Schlamm einer der Flotationsstufe kann einer biologischen Stufe als Überschußschlamm entnommen werden. Bei einem solchen Verfahren mit nachgeschalteter biologischer Stufe kann es auch sinnvoll sein, die in den letzten Flotationskainmern zugesetzten Schlammengen nicht restlos auszuflotieren, sondern an die biologische Stufe weiterzugeben.It is also possible to provide special reaction spaces between the individual flotation chambers, in which the flocculants are added.
The biologically active organic sludge of one of the flotation stages can be removed from a biological stage as excess sludge. In such a process with a downstream biological stage, it can also be useful not to completely float the sludge quantities added in the last flotation chambers, but to pass them on to the biological stage.

Sofern keine hinreichende Menge Überschußschlamrn vorhanden ist oder aber keine nachbiologische Stufe existiert, der aktiver organischer Schlamm entnommen werden kann, ist nach einem weiteren Merkmal der Erfindung vorgesehen, daß ein Teil des Feststoffaustrages durch Sauerstoffzufuhr in einem oder mehreren Reaktionsräumen aktiviert und dem Flotationskreislauf wieder zugesetzt wird.Unless there is a sufficient amount of excess sludge or no post-biological sludge Stage exists from which active organic sludge can be removed is after another Feature of the invention provided that part of the solids discharge by oxygen supply in one or activated several reaction chambers and added to the flotation circuit again.

Claims (6)

Patentansprüche:Patent claims: 1. Verfahren zur Reinigung von Abwasser mit einer Flotationsstufe für das Rohabwasser und/oder das von Grobstoff befreite Rohabwasser, dadurch gekennzeichnet, daß dem Abwasser als flotierbare Substanz biologisch aktiver organischer Schlamm zugesetzt wird.1. Process for the purification of wastewater with a flotation stage for the raw wastewater and / or the raw sewage freed from coarse material, characterized in that the sewage Biologically active organic sludge is added as a floatable substance. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Abwasser mehrstufig in hintereinandergeschalteten Flotationskammern flotiert wird, wobei jeder Flotationskammer emeut biologisch aktiver organischer Schlamm zugesetzt wird.2. The method according to claim 1, characterized in that that the wastewater is floated in multiple stages in flotation chambers connected in series, biologically active organic sludge is again added to each flotation chamber. 3. Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß wenigstens ein Teil des Feststoffaustrages einer nachfolgenden Flotationskammer der vorhergehenden Flotationskammer wieder zugeleitet wird.3. The method according to any one of claims 1 or 2, characterized in that at least part of the Solids discharge from a subsequent flotation chamber of the preceding flotation chamber is fed back in. 4. Verfahren nach einem der Ansprüche 1 bis 3, daurch gekennzeichnet, daß dem Abwasser zusätzlich an sich bekannte organische und/oder anorganische Flockungshilfsmittel, insbesondere organische Polymere, zugegeben werden.4. The method according to any one of claims 1 to 3, characterized in that the wastewater in addition organic and / or inorganic flocculants known per se, in particular organic ones Polymers, are added. 5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Flockungshilfsmittel in der letzten Flotationskammer zugegeben werden.5. The method according to claim 4, characterized in that the flocculants in the last Flotation chamber are added. 6. Verfahren nach einem der Ansprüche 1 bis 5, daurch gekennzeichnet, daß ein Teil des Feststoffaustrages durch Sauerstoffzufuhr in einem oder mehreren Reaktionsräumen aktiviert und dem Flotationskreislauf wieder zugesetzt wird.6. The method according to any one of claims 1 to 5, characterized in that part of the solids discharge activated by supplying oxygen in one or more reaction chambers and added to the flotation circuit again.
DE1816932A 1968-12-24 1968-12-24 Process for the purification of waste water with a flotation stage Expired DE1816932C3 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE1816932A DE1816932C3 (en) 1968-12-24 1968-12-24 Process for the purification of waste water with a flotation stage
NL6919007A NL6919007A (en) 1968-12-24 1969-12-18
ES374847A ES374847A1 (en) 1968-12-24 1969-12-23 Procedure for wastewater purification. (Machine-translation by Google Translate, not legally binding)
FR6944880A FR2027060A1 (en) 1968-12-24 1969-12-24 Purification of effluent by treatment with - a flotation agent
CH1922869A CH500140A (en) 1968-12-24 1969-12-24 Process for the purification of waste water with a flotation stage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1816932A DE1816932C3 (en) 1968-12-24 1968-12-24 Process for the purification of waste water with a flotation stage

Publications (3)

Publication Number Publication Date
DE1816932A1 DE1816932A1 (en) 1970-07-02
DE1816932B2 DE1816932B2 (en) 1978-06-01
DE1816932C3 true DE1816932C3 (en) 1979-02-08

Family

ID=5717358

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1816932A Expired DE1816932C3 (en) 1968-12-24 1968-12-24 Process for the purification of waste water with a flotation stage

Country Status (5)

Country Link
CH (1) CH500140A (en)
DE (1) DE1816932C3 (en)
ES (1) ES374847A1 (en)
FR (1) FR2027060A1 (en)
NL (1) NL6919007A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7701608A (en) * 1977-02-16 1978-08-18 Pielkenrood Vinitex Bv METHOD AND SYSTEM FOR THE TREATMENT OF LIQUIDS, IN PARTICULAR WASTE WATER
US4239620A (en) * 1979-04-16 1980-12-16 Mobil Oil Corporation Cyanide removal from wastewaters
CH656374A5 (en) * 1981-12-18 1986-06-30 Benno Perren METHOD FOR CONTINUOUSLY SEPARATING SUBSTANCES CONTAINED IN A POLLUTED LIQUID, AND DEVICE FOR CARRYING OUT THE METHOD.
DE3712032C1 (en) * 1987-04-09 1988-11-24 Franz Dipl-Ing Koeppl Process and plant for the treatment of dissolved and undissolved substances containing recycled industrial waste water

Also Published As

Publication number Publication date
DE1816932B2 (en) 1978-06-01
ES374847A1 (en) 1972-01-16
CH500140A (en) 1970-12-15
NL6919007A (en) 1970-06-26
FR2027060A1 (en) 1970-09-25
DE1816932A1 (en) 1970-07-02

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Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
8339 Ceased/non-payment of the annual fee