FI101218B - Sätt att fälla ut icke önskvärda substanser ur avloppsvatten - Google Patents

Sätt att fälla ut icke önskvärda substanser ur avloppsvatten Download PDF

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Publication number
FI101218B
FI101218B FI904063A FI904063A FI101218B FI 101218 B FI101218 B FI 101218B FI 904063 A FI904063 A FI 904063A FI 904063 A FI904063 A FI 904063A FI 101218 B FI101218 B FI 101218B
Authority
FI
Finland
Prior art keywords
wastewater
water
value
cod
substances
Prior art date
Application number
FI904063A
Other languages
English (en)
Finnish (fi)
Other versions
FI904063A0 (fi
FI101218B1 (sv
Inventor
Roine Morin
Original Assignee
Sca Moelnlycke Ab
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 Sca Moelnlycke Ab filed Critical Sca Moelnlycke Ab
Publication of FI904063A0 publication Critical patent/FI904063A0/fi
Application granted granted Critical
Publication of FI101218B publication Critical patent/FI101218B/sv
Publication of FI101218B1 publication Critical patent/FI101218B1/sv

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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
    • 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
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
    • C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
    • 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)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Paper (AREA)
  • Removal Of Specific Substances (AREA)
  • Treatment Of Sludge (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)

Claims (4)

1. Sätt att fälla ut icke-önskvärda substanser ur avloppsvatten frän framställning av mekanisk cellulosamassa, företrädesvis kemimekanisk cellulosamassa, sk. CTMP-massa, varvid avloppsvattnet vid pH överstigande 7 försättes med komplex- 5 bindande avgiftningskemikalier för omhändertagande av toxiska substanser, och renas därefter biologiskt i ett eller flera anaeroba och/eller aeroba steg, känneteck-nat av att avgiftningskemikaliema bestar av aluminiumsulfat och/eller jämklorid, att pH-värdet i det frän den biologiska reningen utkommande, avgiftade vattnet sänkes till ett värde under det för utfällning medelst avgiftningskemikaliema optimala pH-10 värdet av 4,5, företrädesvis under 3,0, varigenom icke-önskvärda substanser i det biologiskt renade och avgiftade vattnet utfalles och COD-värdet reduceras.
2. Sätt enligt patentkrav 1, kännetecknat av att före sänkning av pH-värdet blandas det biologiskt renade och avgiftade vattnet med fiberhaltigt avloppsvatten. 15
3. Sätt enligt patentkrav 2, kännetecknat av att det biologiskt renade och avgiftade vattnet blandas med fiberhaltigt vatten.
4. Sätt enligt patentkrav 1-3, kännetecknat av att pH-sänkningen genomföres 20 genom tillsats av syra, företrädesvis sk. restsyra.
FI904063A 1989-08-17 1990-08-16 Sätt att fälla ut icke önskvärda substanser ur avloppsvatten FI101218B1 (sv)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8902764A SE466850B (sv) 1989-08-17 1989-08-17 Saett att faella ut icke oenskvaerda substanser ur avloppsvatten
SE8902764 1989-08-17

Publications (3)

Publication Number Publication Date
FI904063A0 FI904063A0 (fi) 1990-08-16
FI101218B true FI101218B (sv) 1998-05-15
FI101218B1 FI101218B1 (sv) 1998-05-15

Family

ID=20376688

Family Applications (1)

Application Number Title Priority Date Filing Date
FI904063A FI101218B1 (sv) 1989-08-17 1990-08-16 Sätt att fälla ut icke önskvärda substanser ur avloppsvatten

Country Status (2)

Country Link
FI (1) FI101218B1 (sv)
SE (1) SE466850B (sv)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE521847C2 (sv) 2002-04-04 2003-12-09 Kemira Kemi Ab Sätt att behandla restsyra

Also Published As

Publication number Publication date
SE8902764L (sv) 1991-02-18
SE8902764D0 (sv) 1989-08-17
FI904063A0 (fi) 1990-08-16
FI101218B1 (sv) 1998-05-15
SE466850B (sv) 1992-04-13

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Legal Events

Date Code Title Description
GB Transfer or assigment of application

Owner name: SCA M!LNLYCKE AB

HC Name/ company changed in application

Owner name: SCA M!LNLYCKE AB

MM Patent lapsed

Owner name: SCA MOELNLYCKE AB