EP0541586A1 - Epuration d'eaux usees chargees d'huile et de graisse - Google Patents

Epuration d'eaux usees chargees d'huile et de graisse

Info

Publication number
EP0541586A1
EP0541586A1 EP19910912911 EP91912911A EP0541586A1 EP 0541586 A1 EP0541586 A1 EP 0541586A1 EP 19910912911 EP19910912911 EP 19910912911 EP 91912911 A EP91912911 A EP 91912911A EP 0541586 A1 EP0541586 A1 EP 0541586A1
Authority
EP
European Patent Office
Prior art keywords
waste water
talc
oil
grease
wastewater
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.)
Withdrawn
Application number
EP19910912911
Other languages
German (de)
English (en)
Inventor
Norbert Wamser
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.)
Naintsch Mineralwerke GmbH
Original Assignee
Naintsch Mineralwerke 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 Naintsch Mineralwerke GmbH filed Critical Naintsch Mineralwerke GmbH
Publication of EP0541586A1 publication Critical patent/EP0541586A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/0202—Separation of non-miscible liquids by ab- or adsorption
    • 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
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents

Definitions

  • the invention relates to the use of talc as an agent for cleaning oil and grease-laden wastewater.
  • Flocculation is understood as a comprehensive term for all those processes in which emulsified or suspended substances are separated off, whereas the precipitation relates to the removal of dissolved substances.
  • Flocculants are substances which, after dissolving in water, are converted into voluminous precipitates and well destabilize suspensions or emulsions. However, this creates an additional volume of sludge, which must be treated further.
  • Flotation is understood to mean the floating of a substance in a liquid, due to the introduction of the smallest possible gas bubbles. After the flotate has accumulated on the surface of the liquid, it can be removed from the system by means of surface clearers.
  • Another option for cleaning oily wastewater is to use specially adapted natural microorganisms. Due to the biological metabolism, this is a real disposal in which the pollutants are actually broken down and not just relocated. The However, the rate of degradation is strongly dependent on the temperature and the nutrient supply and can also take several years.
  • Adsorption methods are also frequently used for wastewater treatment, the hydrocarbons being bound to activated carbon or to adsorber resins.
  • the adsorption on mica materials (DE-OS 1 167 278) or on an organophilic clay (DE-OS 37 19 929) has also already been investigated.
  • US Pat. No. 4,332,693 proposes a chemical agent for the treatment of oily emulsions in industrial waste water, which consists of a multicomponent mixture with a predominant proportion of acid-activated bentonite, untreated bentonite, lime and aluminum sulfate as well as small amounts of adipic acid, talc and flocculant.
  • the subsequent disposal of the loaded materials is usually carried out by incineration or by regeneration of the adsorbent using a stripper.
  • talc with a certain grain size is an excellent means of separating oils and fats from wastewater loaded with them.
  • talc according to the invention as an adsorbent can expediently be carried out in all companies which produce large amounts of waste water which is contaminated with high oil and fat loads.
  • the contaminated waste water from leather factories, slaughterhouses, refineries, large paint shops and the like are particularly suitable for the waste water treatment according to the invention.
  • Practical tests have shown that the use of talc as an adsorbent gives good results for both animal and mineral fats; both types are well bound to the talc.
  • the amount of finely divided talc used will primarily depend on the concentration of the contaminant to be removed in the wastewater. This amount of talc can be of the order of magnitude be about 100 mg per 1 liter of waste water.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Water Treatment By Sorption (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

Du talc à grains fins d'une granulométrie de 90 à 3 mum convient remarquablement bien, comme adsorbant, au nettoyage d'eaux chargées d'huile et de graisse, en particulier provenant de tanneries, d'abattoirs, de raffineries, d'ateliers de peinture industriels et analogues.
EP19910912911 1990-07-27 1991-07-24 Epuration d'eaux usees chargees d'huile et de graisse Withdrawn EP0541586A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT158190A AT394030B (de) 1990-07-27 1990-07-27 Reinigung von oel- und fettbeladenem abwasser
AT1581/90 1990-07-27

Publications (1)

Publication Number Publication Date
EP0541586A1 true EP0541586A1 (fr) 1993-05-19

Family

ID=3516510

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910912911 Withdrawn EP0541586A1 (fr) 1990-07-27 1991-07-24 Epuration d'eaux usees chargees d'huile et de graisse

Country Status (9)

Country Link
EP (1) EP0541586A1 (fr)
JP (1) JPH06506390A (fr)
AT (1) AT394030B (fr)
AU (1) AU8099191A (fr)
CA (1) CA2088142A1 (fr)
HU (1) HUT67593A (fr)
PL (1) PL297649A1 (fr)
SK (1) SK3493A3 (fr)
WO (1) WO1992002459A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE145192T1 (de) * 1993-03-11 1996-11-15 Naintsch Mineralwerke Verbesserte methode zur reinigung von abwasser unter anwendung von belebtem schlamm zur vergrösserung der reinigungsausbeuten
AT401383B (de) * 1993-03-11 1996-08-26 Naintsch Mineralwerke Verfahren zur verringerung des schlammvolumens in der biologischen abwasserreinigung und mittel hiefür
AT139U1 (de) * 1994-06-01 1995-03-27 Naintsch Mineralwerke Verfahren zur biologischen abwasserreinigung, mittel und vorrichtung hierfuer

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2744451A1 (de) * 1977-10-03 1979-04-12 Dieter Knauer Verschlusseinrichtung fuer fenster, tueren o.dgl. oeffnungen
US4332693A (en) * 1978-01-06 1982-06-01 American Colloid Company Agent for the purification of waste waters and process for its production
DE3043480A1 (de) * 1980-11-18 1982-07-08 Justin Hüppe GmbH, 2900 Oldenburg Rolladen
US4496374A (en) * 1983-02-23 1985-01-29 Parker Chemical Company Compound and process for denaturing high solids paints

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9202459A1 *

Also Published As

Publication number Publication date
SK3493A3 (en) 1993-10-06
WO1992002459A1 (fr) 1992-02-20
AU8099191A (en) 1992-03-02
ATA158190A (de) 1991-07-15
CA2088142A1 (fr) 1992-01-28
PL297649A1 (fr) 1992-07-13
AT394030B (de) 1992-01-27
JPH06506390A (ja) 1994-07-21
HUT67593A (en) 1995-04-28
HU9300206D0 (en) 1993-09-28

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19930916

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