FI130747B1 - Precipitating organic pollutants from aqueous liquids - Google Patents

Precipitating organic pollutants from aqueous liquids

Info

Publication number
FI130747B1
FI130747B1 FI20195067A FI20195067A FI130747B1 FI 130747 B1 FI130747 B1 FI 130747B1 FI 20195067 A FI20195067 A FI 20195067A FI 20195067 A FI20195067 A FI 20195067A FI 130747 B1 FI130747 B1 FI 130747B1
Authority
FI
Finland
Prior art keywords
organic pollutants
filtrate
aqueous liquids
precipitating organic
bleaching
Prior art date
Application number
FI20195067A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI20195067A1 (en
Inventor
Ari Poukka
Original Assignee
Metsae Fibre Oy
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 Metsae Fibre Oy filed Critical Metsae Fibre Oy
Priority to FI20195067A priority Critical patent/FI130747B1/en
Priority to PCT/FI2020/050054 priority patent/WO2020157385A1/en
Publication of FI20195067A1 publication Critical patent/FI20195067A1/en
Application granted granted Critical
Publication of FI130747B1 publication Critical patent/FI130747B1/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • 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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0021—Introduction of various effluents, e.g. waste waters, into the pulping, recovery and regeneration cycle (closed-cycle)
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/06—Controlling or monitoring parameters in water treatment pH
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S210/00—Liquid purification or separation
    • Y10S210/928—Paper mill waste, e.g. white water, black liquor treated

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)
  • Paper (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

The invention concerns a method for precipitating organic pollutants from aqueous liquids used in process stages for bleaching or de-lignifying pulp in a pulp mill. The method comprises the steps of adjusting the pH of an acid aqueous liquid received from a bleaching or de-lignifying process stage in a pulp mill to alkaline by adding at least one agent containing calcium, precipitating organic pollutants in a precipitation stage from the alkalated aqueous liquid, and reducing the pH of the filtrate from said precipitation stage to a value of 6 – 9 by adding at least one acid agent to said filtrate. With the inventive method, organic pollutants are effectively removed and COD levels of the filtrate are significantly lowered compared with traditional processes. The processing of effluents and wastewater thus become simplified.
FI20195067A 2019-02-01 2019-02-01 Precipitating organic pollutants from aqueous liquids FI130747B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FI20195067A FI130747B1 (en) 2019-02-01 2019-02-01 Precipitating organic pollutants from aqueous liquids
PCT/FI2020/050054 WO2020157385A1 (en) 2019-02-01 2020-01-30 Precipitating organic pollutants from aqueous liquids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20195067A FI130747B1 (en) 2019-02-01 2019-02-01 Precipitating organic pollutants from aqueous liquids

Publications (2)

Publication Number Publication Date
FI20195067A1 FI20195067A1 (en) 2020-08-02
FI130747B1 true FI130747B1 (en) 2024-02-26

Family

ID=69528864

Family Applications (1)

Application Number Title Priority Date Filing Date
FI20195067A FI130747B1 (en) 2019-02-01 2019-02-01 Precipitating organic pollutants from aqueous liquids

Country Status (2)

Country Link
FI (1) FI130747B1 (en)
WO (1) WO2020157385A1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT392635B (en) * 1988-10-04 1991-05-10 Leykam Muerztaler Papier METHOD FOR DISPOSAL OF WASTEWATER FROM CELLULAR FACTORIES
FI128111B (en) * 2012-11-09 2019-10-15 Upm Kymmene Corp A method and a system for treating liquid flows at a chemical pulp mill
CN108083483A (en) * 2016-11-19 2018-05-29 湖南唯美环境工程股份有限公司 A kind of papermaking or the decoloration treatment method of dyeing waste water

Also Published As

Publication number Publication date
WO2020157385A1 (en) 2020-08-06
FI20195067A1 (en) 2020-08-02

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