FI130747B1 - Precipitating organic pollutants from aqueous liquids - Google Patents
Precipitating organic pollutants from aqueous liquidsInfo
- 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
Links
- 239000007788 liquid Substances 0.000 title abstract 4
- 239000002957 persistent organic pollutant Substances 0.000 title abstract 4
- 230000001376 precipitating effect Effects 0.000 title abstract 3
- 238000000034 method Methods 0.000 abstract 6
- 239000000706 filtrate Substances 0.000 abstract 3
- 239000002253 acid Substances 0.000 abstract 2
- 238000004061 bleaching Methods 0.000 abstract 2
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- 238000001556 precipitation Methods 0.000 abstract 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract 1
- 229910052791 calcium Inorganic materials 0.000 abstract 1
- 239000011575 calcium Substances 0.000 abstract 1
- 239000002351 wastewater Substances 0.000 abstract 1
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.
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)
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 |
-
2019
- 2019-02-01 FI FI20195067A patent/FI130747B1/en active
-
2020
- 2020-01-30 WO PCT/FI2020/050054 patent/WO2020157385A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2020157385A1 (en) | 2020-08-06 |
FI20195067A1 (en) | 2020-08-02 |
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