FR2242335A1 - Water purification and sterilization - using chlorination and flocculation by ferrous cpd(s) in reverse order to normal or simultaneously - Google Patents

Water purification and sterilization - using chlorination and flocculation by ferrous cpd(s) in reverse order to normal or simultaneously

Info

Publication number
FR2242335A1
FR2242335A1 FR7429339A FR7429339A FR2242335A1 FR 2242335 A1 FR2242335 A1 FR 2242335A1 FR 7429339 A FR7429339 A FR 7429339A FR 7429339 A FR7429339 A FR 7429339A FR 2242335 A1 FR2242335 A1 FR 2242335A1
Authority
FR
France
Prior art keywords
ferrous
added
active chlorine
esp
source
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
FR7429339A
Other languages
French (fr)
Other versions
FR2242335B1 (en
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.)
Solvay SA
Original Assignee
Solvay 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 Solvay SA filed Critical Solvay SA
Publication of FR2242335A1 publication Critical patent/FR2242335A1/en
Application granted granted Critical
Publication of FR2242335B1 publication Critical patent/FR2242335B1/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
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
    • 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
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)

Abstract

The quantity of active chlorine used is sufficient to overcome the reaction threshold and reacts with the ferrous salt(s) to form other ferrous cpds. The flocculant salt(s), the optional oxidn. promoter and the source of active chlorine may be added simultaneously esp. as a premixt., or the source of active chlorine added after the other agents. The ferrous salt used is esp. ferrous chloride, the oxidn. promoter is HCl in stoichiometric quantities relative to the ferrous chloride and the source of active chlorine is sodium hypochlorite. When the last is added after the other additives, the pH value of the finished prodt. is 7.5-8; when all agents are added as a premix simultaneously, the pH value is 6-7, esp. 6. There is significant improvement esp. in terms of pH control compared to conventional method where active chlorine source is added before the flocculant(s).
FR7429339A 1973-09-04 1974-08-23 Water purification and sterilization - using chlorination and flocculation by ferrous cpd(s) in reverse order to normal or simultaneously Granted FR2242335A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE135288A BE804425A (en) 1973-09-04 1973-09-04 WATER TREATMENT AND STERILIZATION PROCESS

Publications (2)

Publication Number Publication Date
FR2242335A1 true FR2242335A1 (en) 1975-03-28
FR2242335B1 FR2242335B1 (en) 1979-01-05

Family

ID=3842182

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7429339A Granted FR2242335A1 (en) 1973-09-04 1974-08-23 Water purification and sterilization - using chlorination and flocculation by ferrous cpd(s) in reverse order to normal or simultaneously

Country Status (5)

Country Link
BE (1) BE804425A (en)
CH (1) CH593211A5 (en)
ES (1) ES429313A1 (en)
FR (1) FR2242335A1 (en)
IT (1) IT1017785B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2385650A1 (en) * 1977-03-29 1978-10-27 Courtaulds Ltd COLORED AQUEOUS EFFLUENT TREATMENT

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113371879A (en) * 2021-06-16 2021-09-10 华融化学股份有限公司 Pretreatment method of wastewater containing vinyl chloride

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2385650A1 (en) * 1977-03-29 1978-10-27 Courtaulds Ltd COLORED AQUEOUS EFFLUENT TREATMENT

Also Published As

Publication number Publication date
BE804425A (en) 1974-03-04
ES429313A1 (en) 1976-08-16
IT1017785B (en) 1977-08-10
FR2242335B1 (en) 1979-01-05
CH593211A5 (en) 1977-11-30

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Legal Events

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ST Notification of lapse