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FR2431996A1 - Electrolytically removing chromium from aq. effluent - followed by flocculation and decanting stages - Google Patents

Electrolytically removing chromium from aq. effluent - followed by flocculation and decanting stages

Info

Publication number
FR2431996A1
FR2431996A1 FR7822451A FR7822451A FR2431996A1 FR 2431996 A1 FR2431996 A1 FR 2431996A1 FR 7822451 A FR7822451 A FR 7822451A FR 7822451 A FR7822451 A FR 7822451A FR 2431996 A1 FR2431996 A1 FR 2431996A1
Authority
FR
France
Prior art keywords
effluent
passing
flocculation
followed
removing chromium
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.)
Granted
Application number
FR7822451A
Other languages
French (fr)
Other versions
FR2431996B1 (en
Inventor
Jacques Miquel
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.)
Electricite de France SA
Original Assignee
Electricite de France SA
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 Electricite de France SA filed Critical Electricite de France SA
Priority to FR7822451A priority Critical patent/FR2431996A1/en
Publication of FR2431996A1 publication Critical patent/FR2431996A1/en
Application granted granted Critical
Publication of FR2431996B1 publication Critical patent/FR2431996B1/fr
Granted 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
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • 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
    • C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
    • 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
    • C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4676—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electroreduction
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • 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
    • C02F2001/007—Processes including a sedimentation step
    • 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
    • C02F2101/22—Chromium or chromium compounds, e.g. chromates

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

The process comprises (a) passing the water into an eletrolysis cell having a soluble anode liberating Fe ions; (b) passing the effluent from (a) into a reduction-digassing vessel having fast agitation; (c) passing the effluent from (b) into a flocculation vessel having slow agitation; and (d) passing the effluent from (c) into a decanter in which the solid phase is sepd and part of the solid may be recycled to the flocculator. The process is applied to effluent from electrolytic chroming, tanning, textile mondanting, metal anti-corrosion treatment and from chemical industries. It is both very effective and economic.
FR7822451A 1978-07-28 1978-07-28 Electrolytically removing chromium from aq. effluent - followed by flocculation and decanting stages Granted FR2431996A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7822451A FR2431996A1 (en) 1978-07-28 1978-07-28 Electrolytically removing chromium from aq. effluent - followed by flocculation and decanting stages

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7822451A FR2431996A1 (en) 1978-07-28 1978-07-28 Electrolytically removing chromium from aq. effluent - followed by flocculation and decanting stages

Publications (2)

Publication Number Publication Date
FR2431996A1 true FR2431996A1 (en) 1980-02-22
FR2431996B1 FR2431996B1 (en) 1982-01-22

Family

ID=9211340

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7822451A Granted FR2431996A1 (en) 1978-07-28 1978-07-28 Electrolytically removing chromium from aq. effluent - followed by flocculation and decanting stages

Country Status (1)

Country Link
FR (1) FR2431996A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2431995A1 (en) * 1978-07-27 1980-02-22 Vellas Jean PROCESS FOR THE OLIGODYNAMIC TREATMENT OF LIQUIDS AND DEVICE FOR IMPLEMENTING SAME
FR2489806A1 (en) * 1980-09-11 1982-03-12 Electricite De France Purificn. of seasonal effluent from small settlement e.g. camp sites - by electro-coagulation followed by filtration in textile filter sleeves
DE4024424A1 (en) * 1990-08-01 1992-02-06 Iwatech Konrad Gmbh METHOD AND DEVICE FOR TREATING POLLUTED LIQUIDS
FR2728253A1 (en) * 1994-12-16 1996-06-21 Tovarischestvo S Ogranichennoi Electrochemical purificn. of potable water

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3926754A (en) * 1972-02-11 1975-12-16 Andco Inc Electrochemical contaminant removal from aqueous media
DE2617625A1 (en) * 1976-04-22 1977-10-27 Theo Benning Elektrogeraete Kg Standby batteries periodic testing appts. - has two way invertor used both for battery charge and discharge into mains

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3926754A (en) * 1972-02-11 1975-12-16 Andco Inc Electrochemical contaminant removal from aqueous media
DE2617625A1 (en) * 1976-04-22 1977-10-27 Theo Benning Elektrogeraete Kg Standby batteries periodic testing appts. - has two way invertor used both for battery charge and discharge into mains

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXRV/75 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2431995A1 (en) * 1978-07-27 1980-02-22 Vellas Jean PROCESS FOR THE OLIGODYNAMIC TREATMENT OF LIQUIDS AND DEVICE FOR IMPLEMENTING SAME
FR2489806A1 (en) * 1980-09-11 1982-03-12 Electricite De France Purificn. of seasonal effluent from small settlement e.g. camp sites - by electro-coagulation followed by filtration in textile filter sleeves
DE4024424A1 (en) * 1990-08-01 1992-02-06 Iwatech Konrad Gmbh METHOD AND DEVICE FOR TREATING POLLUTED LIQUIDS
FR2728253A1 (en) * 1994-12-16 1996-06-21 Tovarischestvo S Ogranichennoi Electrochemical purificn. of potable water

Also Published As

Publication number Publication date
FR2431996B1 (en) 1982-01-22

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Legal Events

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