RU95107659A - Process fro purifying aqueous waste pulp at forest industry enterprises - Google Patents

Process fro purifying aqueous waste pulp at forest industry enterprises

Info

Publication number
RU95107659A
RU95107659A RU95107659/25A RU95107659A RU95107659A RU 95107659 A RU95107659 A RU 95107659A RU 95107659/25 A RU95107659/25 A RU 95107659/25A RU 95107659 A RU95107659 A RU 95107659A RU 95107659 A RU95107659 A RU 95107659A
Authority
RU
Russia
Prior art keywords
aqueous waste
added
waste pulp
forest industry
industry enterprises
Prior art date
Application number
RU95107659/25A
Other languages
Russian (ru)
Inventor
Йокинен Симо
Fi]
Лайне Эйя
Original Assignee
Кемира Ой (FI)
Кемира Ой
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 Кемира Ой (FI), Кемира Ой filed Critical Кемира Ой (FI)
Publication of RU95107659A publication Critical patent/RU95107659A/en

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
    • C02F1/52—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
    • C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
    • 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
    • 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
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material

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 Sludge (AREA)

Abstract

FIELD: chemical industry. SUBSTANCE: claimed invention describes process for improving aqueous slime so that prior to stage of mechanical dehydration, two components are added to said slime to increase its ability of being dehydrated. Aqueous coagulating mixture containing trivalent iron and organic polymer having molecular weight of less than 1,000,000 are added and polyelectrolyte having molecular weight of greater than 3,000,000 is then added. EFFECT: more efficient purification process.

Claims (1)

Изобретение относится к способу улучшения очистки водного шлама. Сущность изобретения: перед стадией механического обезвоживания к водному шламу добавляют два компонента для увеличения его способности к обезвоживанию. Сначала добавляют водную коагулирующую смесь, содержащую соль трехвалентного железа и органический полимер с мол.м. менее 1000000, а затем добавляют полиэлектролит с мол.м. более 3000000.The invention relates to a method for improving the treatment of water sludge. The inventive before the stage of mechanical dehydration to the water sludge add two components to increase its ability to dehydrate. First, an aqueous coagulating mixture is added containing a ferric salt and an organic polymer with a mol.m. less than 1,000,000, and then add a polyelectrolyte with a mol.m. more than 3,000,000.
RU95107659/25A 1992-07-21 1993-07-21 Process fro purifying aqueous waste pulp at forest industry enterprises RU95107659A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI923315 1992-07-21
FI923315A FI923315A (en) 1992-07-21 1992-07-21 FOERFARANDE FOER FOERBAETTRANDE AV AVLAPPSVATTENSLAMMENS VATTENAVSKILJNINGSFOERMAOGA

Publications (1)

Publication Number Publication Date
RU95107659A true RU95107659A (en) 1996-12-20

Family

ID=8535637

Family Applications (1)

Application Number Title Priority Date Filing Date
RU95107659/25A RU95107659A (en) 1992-07-21 1993-07-21 Process fro purifying aqueous waste pulp at forest industry enterprises

Country Status (7)

Country Link
EP (1) EP0649390A1 (en)
JP (1) JPH07508924A (en)
AU (1) AU4572293A (en)
CA (1) CA2140631A1 (en)
FI (1) FI923315A (en)
RU (1) RU95107659A (en)
WO (1) WO1994002424A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2487085C2 (en) * 2007-10-15 2013-07-10 Налко Компани Method of increasing flow of water from settling tank of process of treating tar sands through membrane separation and water treatment system

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9411444D0 (en) * 1994-06-08 1994-07-27 Cdm Ab Dewatering of suspensions
GB2322128B (en) * 1997-02-18 2001-08-15 Acideka S A Mixed coagulants
BE1012286A3 (en) * 1997-02-28 2000-09-05 Acideka S A Method for producing composite coagulants to clarify water, compositecoagulants obtained using said method and water clarification method withsaid composite coagulants
NL1005503C2 (en) * 1997-03-12 2000-02-23 Acideka Production of mixed coagulants for water clarification - comprising addition of a water-soluble cationic polymer derived from one or more vinyl monomer to an inorganic coagulant
US6685834B1 (en) * 1999-12-20 2004-02-03 Kruger, Inc. Method for conditioning and dewatering thermophilic aerobically digested biosolids
CN105217757A (en) * 2015-10-22 2016-01-06 石家庄蓝江生物环保科技有限公司 Inorganic whisker coagulating agent and its production and use
EP3638630B1 (en) * 2017-06-13 2023-06-07 Kemira Oyj Method for treating sludge
CN114763272A (en) * 2021-01-12 2022-07-19 轩德(深圳)环保科技有限公司 Sludge reduction and harmless treatment method for composite coagulation solid-liquid separation

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3642619A (en) * 1970-08-31 1972-02-15 Calgon Corp Conditioning sewage waste sludges for dewatering
GB1512022A (en) * 1976-08-05 1978-05-24 Hemlab Ag Flocculating agents for water treatment
US4251363A (en) * 1979-09-11 1981-02-17 American Cyanamid Company Anionic polymeric flocculant combinations for settling phosphate slimes
DE3820110A1 (en) * 1988-06-13 1989-12-14 Nalco Chemical Co Process for dewatering sewage sludges
GB9021565D0 (en) * 1990-10-04 1990-11-21 Allied Colloids Ltd Dewatering compositions and processes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2487085C2 (en) * 2007-10-15 2013-07-10 Налко Компани Method of increasing flow of water from settling tank of process of treating tar sands through membrane separation and water treatment system
RU2487085C9 (en) * 2007-10-15 2013-09-27 Налко Компани Method of increasing flow of water from settling tank of process of treating tar sands through membrane separation and water treatment system

Also Published As

Publication number Publication date
FI923315A (en) 1994-01-22
WO1994002424A1 (en) 1994-02-03
EP0649390A1 (en) 1995-04-26
AU4572293A (en) 1994-02-14
JPH07508924A (en) 1995-10-05
FI923315A0 (en) 1992-07-21
CA2140631A1 (en) 1994-02-03

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