CN1196033A - Process for treating surplus activated sludge - Google Patents

Process for treating surplus activated sludge Download PDF

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Publication number
CN1196033A
CN1196033A CN96196796A CN96196796A CN1196033A CN 1196033 A CN1196033 A CN 1196033A CN 96196796 A CN96196796 A CN 96196796A CN 96196796 A CN96196796 A CN 96196796A CN 1196033 A CN1196033 A CN 1196033A
Authority
CN
China
Prior art keywords
active sludge
residual active
sulfate
sludge
activated sludge
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.)
Pending
Application number
CN96196796A
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Chinese (zh)
Inventor
弗拉基米尔·帕夫洛维奇·格鲁丹宁
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.)
Alexander Pavlovic Anisimov
Original Assignee
Alexander Pavlovic Anisimov
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 Alexander Pavlovic Anisimov filed Critical Alexander Pavlovic Anisimov
Publication of CN1196033A publication Critical patent/CN1196033A/en
Pending legal-status Critical Current

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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
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • C02F11/143—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • C02F11/143—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances
    • C02F11/145—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances using calcium compounds
    • 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
    • D21C11/0064—Aspects concerning the production and the treatment of green and white liquors, e.g. causticizing green liquor

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Treatment Of Sludge (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

The present invention relates to a process for treating settlings formed during the biological purification of municipal and industrial waste water and may be used in various fields of industry, in particular in paper and pulp production. A pre-thickened surplus activated sludge is subjected to treatment with white slime obtained at the state of causticizing green liquour in the sulfate-pulp production, while stirring. White slime is used in a volume ratio to the surplus activated sludge equal to 1 : 5 - 10. Thereupon, the sludge so treated is subjected to dehydration by filtering, preferably at a temperature of between 75 and 104 DEG C. The dehydrated settlings are dried and burned down. An ash residue so obtained as well as a clarified alkaline hydrolyzate are used in the manufacturing process of the sulfate-pulp production. The present process for treating the surplus activated sludge allows intensification of the filtration process, avoiding the use of expensive chemical reagents, a complete utilization of products obtained when treating the sludge as well as utilization of the sulfate-pulp production waste, that is white slime, with simplification of the production procedures and techniques and significant reduction of material costs.

Description

Handle the method for residual active sludge
Technical field
The present invention relates to the sedimental method that a kind of processing generates in biopurification municipal wastewater and trade effluent process, can also be used for various industrial circles, especially papermaking and pulp production.
Background technology
Known severally handle remaining active sludge, then by filtering and precipitation makes it to be separated into water and thick sedimental method with special reagent.In most of the cases, the reagent that is used for this purposes has iron(ic) chloride and lime white (to see people such as O.l.Yakovleva " sewage disposal ", " Lesnaya Promyshlennost ", Moscow, 1975, the 40-43 page or leaf), various ammonium salts (are seen United States Patent (USP) 4240904, International Classification C02F11/14,1980), and the organic compound (inventors certificate the 827424th of the Soviet Union of seing before, International Classification C02F11/14,1981).
Also known several by means of filtering and flocculating aids, make residual active sludge be separated into water and thick settling, handle the method for residual active sludge, flocculating aids can be a mineral compound, for example Wingdale, gypsum (seeing above-mentioned USSR (Union of Soviet Socialist Republics) inventors certificate the 827424th), or macromolecular organic compound (are seen English Patent the 1466185th as the multipolymer of acrylamide and methacrylic acid derivative, International Classification C02C3/00,1977).
The major defect of aforesaid method is to need to use expensive chemical reagent, and don't regenerates them.
Described the immediate prior art that is used to handle residual active sludge in one approach, carried out preliminary precipitation after being included in filtration, handled with reagent avoiding.The settling that dehydrating residual active sludge is obtained is handled on filter cloth with alkali lye or white sulfate liquor.In this case, after it is evaporated, can from residual active sludge, obtain highly spissated alkali lye, burn settling (Soviet Union's inventors certificate the 1038287th that sees before, International Classification C02F11/14,1983) then.
The main drawback of known process method is that efficient is low, and is long to the time that settling carries out processed by filtration, and this is because above-mentioned settling contains stable water, and has very high filtration resistance.In addition, known treatment process need be used expensive alkali lye (seeing Yu.N.Nelepin, " sulfate pulping production ", " Lesnaya Promyshlennost ", Moscow, 1990, the 531 pages).
The present invention's general introduction
In order to solve the problems referred to above that prior art exists, the present invention has been proposed, the object of the present invention is to provide a kind of method of new processing residual active sludge, this method can be strengthened sedimental processed by filtering, avoid using expensive chemical reagent, utilize the processing product (clarifying alkaline hydrolysis product and residue ash content) so obtain fully, and utilize refuse in the sulfate pulping production with minimum expense.
By utilizing the white clay that obtains in the sulfate pulping production process causticization green liquor stage, by stirring remaining active sludge is carried out the prethickening processing, and by filter, dry and burn the dehydration settling, the volume ratio that makes dehydration obtain white clay and residual active sludge is 1: 5-10, thus realize above-mentioned technical purpose of the present invention.
The difference of the present invention and known technology is, the invention provides a kind of method of handling the residual active sludge after the pre-dehydration, this method utilization white clay that the causticization green liquor stage obtains in the sulfate pulping production process, stir remaining active sludge to carry out pre-processed, white clay and residual active sludge volume ratio are 1: 5-10.
The used white clay of above-mentioned processing residual active sludge method is the refuse during sulfate pulping is produced, and this refuse is that density is 1.25-1.35Kg/dm 3Black suspension, the weight percent of its chemical composition is as follows:
CaCO 3 - 38.50
NaOH - 3.30
Na 2S - 1.48
Na 2CO 3 - 1.85
H 2O - 51.85
Other impurity-3.02
As everyone knows, in the sulfate pulping production process, the regeneration waste black liquor can form the frit that major ingredient is a yellow soda ash (the mineral substance composition of waste black liquor).Then, dissolve this frit, the green liquor that obtains is thus carried out causticization, obtain a kind of white liquid and precipitation of calcium carbonate, i.e. white clay by adding calcium oxide.Usually, require subsequently white clay to be cleaned (Soviet Union's inventors certificate the 827424th that sees before, C02F11/14,1981) repeatedly with fresh water and special-purpose chemical reagent.Not only make this process complicated, also increased cost and adopt fresh water and expensive organic compound to clean.
The method according to this invention uses white clay can solve this two problems simultaneously, on the one hand, greatly reduces the expense of handling residual active sludge, on the other hand, reduces the expense of utilizing white clay significantly.
The salt that the hydrolysate of the available virtually completely sludge organism organic moiety (weight percent of dried residuum is no more than 83%) of alkalescence and amino acid, amino alcohol and some protein derivatives form, by means of the white clay that contains alkaline matter, the residual active sludge after the preliminary precipitation thickening is handled.When abundant stirring, be white clay energy uniform distribution in undecomposed big fiber of major ingredient with lime carbonate, solid particulate accounts for the per-cent of dry weight up to 17% in the residual active sludge.Can change the sedimentary unfavorable structure of residual active sludge like this, (that is to say, under the condition of handling without special agent) promptly under normal operation, contain stable water, and have very high filtration resistance.Solid particulate in the residual active sludge and big fiber combine with calcium carbonate granule, make solid phase and liquid phase separation by filtration, make solid phase lose water.Therefore, the method according to this invention, on the one hand, the white clay of producing in the refuse from sulfate pulping can replace expensive alkaline reagents, and on the other hand, it also has the function of flocculating aids.
Embodiments of the present invention are as follows.
Radially or in the vertical pond residual active sludge is carried out the prethickening processing at one.Most preferably, thickening is handled and is lasted till that the concentration of residual active sludge is up to 13-40g/l.After the thickening, residual active sludge is transported in the mixing tank, and stir on the limit there the limit remaining active sludge of lime mud treatment.The volume ratio of white clay and residual active sludge is 1: 5-10, this ratio can make after-filtration efficient maximum.When usefulness is less than the lime mud treatment mud of above-mentioned amount, can reduce filtering rate significantly.Use the white clay that surpasses the aforementioned proportion amount can not reach technique effect of the present invention.Most preferably, under 75-104 ℃ temperature, stir.Can also use the following lesser temps of room temperature, but in this case, treating processes will prolong.The processing of being carried out can make the biological organic moiety of residual active sludge all decompose.Then, the mixture that obtains thus is transported in a vacuum filter or the pressure filter dewaters, contain the solid particulate that exists in alkaline hydrolysis product, undecomposed fiber and the residual active sludge in this mixture, and after stirring equally distributed lime carbonate in the sludgd deposition composition granule.Need not subsequent disposal, just can make and filter the clarifying alkaline hydrolysis product that obtains is used for sulfate pulping in the reagent regeneration stage production cycle.Drain the settling after the dehydration that forms on its surface from the surface of strainer fast, in a drying drum, this settling is carried out heated drying subsequently, and in an incinerator, burn.The residue ash content that contains calcium oxide can be used for the production cycle of sulfate pulping in the green liquor causticizing stage.
Realize best mode of the present invention
After the suspension sedimentation that makes 5 liters of residual active sludges, adding concentration is 30g/l radially in the pond at one, and 0.75 liter white clay suspension fully stirred 15 minutes under 95 ℃ temperature.The mixture that obtains thus is transported in the vacuum filter, and settling is carried out processed.In this case, filtering rate is 40 liters/meter 2/ minute.Clarifying alkaline hydrolysis product is drained, be used for the sulfate pulping production cycle.The dehydration settling that filter surfaces forms is removed, and under 850 ℃ temperature, carried out drying and incinerating and fall.With the residue ash delivery that obtains to the green liquor causticizing stage.
Industrial applicibility
The method of processing residual active sludge of the present invention has been strengthened filter process, can avoid using high Expensive chemical reagent (refuse of producing by consuming sulfate pulp) utilizes lignin-sludge fully The time product (using the basic hydrolysis product of ash content and clarification) that obtains, and sulfate pulp is given birth to The refuse that produces, i.e. white clay, thus simplified production process and production technology, and obviously reduced material The material expense. In order to compare, providing the existing methods filtering rate is 4 liters/meter2/ minute. In addition, Method of the present invention has also reduced the time of dehydration, and has reduced thus the energy that dehydration consumes Amount.

Claims (3)

1, a kind of method of handling residual active sludge, wherein residual active sludge is carried out prethickening and by filtering it carried out processed, settling after the dehydration is carried out drying and burns, wherein before filtering, by stirring, with the white clay that the sulfate pulping production process causticization green liquor stage obtains, the residual active sludge behind the prethickening to be handled, the volume ratio of white clay and residual active sludge is 1: 5-10.
2, the method for claim 1, it is 13-40g/l that the concentration that proceeds to residual active sludge is handled in wherein above-mentioned thickening.
3, method as claimed in claim 1 or 2 is wherein carried out above-mentioned processing with white clay under 75-104 ℃ temperature.
CN96196796A 1995-07-18 1996-02-12 Process for treating surplus activated sludge Pending CN1196033A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU9595112218A RU2079454C1 (en) 1995-07-18 1995-07-18 Method of processing excessive activated sludge
RU95112218 1995-07-18

Publications (1)

Publication Number Publication Date
CN1196033A true CN1196033A (en) 1998-10-14

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ID=20170155

Family Applications (1)

Application Number Title Priority Date Filing Date
CN96196796A Pending CN1196033A (en) 1995-07-18 1996-02-12 Process for treating surplus activated sludge

Country Status (11)

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EP (1) EP0842125A1 (en)
JP (1) JPH11510090A (en)
KR (1) KR19990028251A (en)
CN (1) CN1196033A (en)
AU (1) AU4680296A (en)
BR (1) BR9609736A (en)
CA (1) CA2224683A1 (en)
FI (1) FI980091A0 (en)
NO (1) NO980210L (en)
RU (1) RU2079454C1 (en)
WO (1) WO1997003928A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1295399C (en) * 2003-12-01 2007-01-17 中国农业科学院土壤肥料研究所 Technology of repairing rock dome using mixed polymer of daily sludge and waste plastics
CN102491618A (en) * 2011-11-29 2012-06-13 曾秀仪 Depth dehydration method for residual sludge
CN104066885A (en) * 2011-11-04 2014-09-24 维美德公司 Method for the causticizing process for producing white liquor
CN106396308A (en) * 2016-10-27 2017-02-15 环境保护部华南环境科学研究所 Excess activated sludge recycling method
CN110424179A (en) * 2019-08-26 2019-11-08 华南理工大学 A kind of modified method for being used as papermaking filler of solid waste after paper mill sludge burns
CN112726252A (en) * 2020-11-30 2021-04-30 山东华泰纸业股份有限公司 Comprehensive utilization method of waste residues of paper mill
CN112796144A (en) * 2020-12-28 2021-05-14 山东泗水金立得纸业有限公司 Method for recycling kaolin from sludge of carbon-free copy paper production line

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109279758B (en) * 2018-11-21 2021-08-10 湖南骏泰新材料科技有限责任公司 Efficient green mud washing method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2410394A1 (en) * 1973-03-07 1974-09-12 Andco Inc PROCESS FOR DRAINING AN AQUATIC SLUDGE OF DISPERSED, FINELY CRUSHED SOLIDS
US4030968A (en) * 1975-12-22 1977-06-21 Consolidated-Bathurst Limited Disposal of paper pulp mill sludge
NL7707081A (en) * 1977-06-27 1978-12-29 Stamicarbon METHOD FOR THE BIOLOGICAL PURIFICATION OF WASTE WATER.
DE3043518C2 (en) * 1979-11-20 1985-08-01 Amurskij celljulozno-kartonnyj kombinat, Amursk Process for the recovery of waste water precipitation or residues
SU1038287A1 (en) * 1979-11-20 1983-08-30 Всесоюзное научно-производственное объединение целлюлозно-бумажной промышленности Method of treating excessive active slurry

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1295399C (en) * 2003-12-01 2007-01-17 中国农业科学院土壤肥料研究所 Technology of repairing rock dome using mixed polymer of daily sludge and waste plastics
CN104066885A (en) * 2011-11-04 2014-09-24 维美德公司 Method for the causticizing process for producing white liquor
CN104066885B (en) * 2011-11-04 2015-10-21 维美德公司 Causticization process prepares the method for white liquid
CN102491618A (en) * 2011-11-29 2012-06-13 曾秀仪 Depth dehydration method for residual sludge
CN106396308A (en) * 2016-10-27 2017-02-15 环境保护部华南环境科学研究所 Excess activated sludge recycling method
CN106396308B (en) * 2016-10-27 2019-12-31 环境保护部华南环境科学研究所 Recycling method of residual activated sludge
CN110424179A (en) * 2019-08-26 2019-11-08 华南理工大学 A kind of modified method for being used as papermaking filler of solid waste after paper mill sludge burns
CN112726252A (en) * 2020-11-30 2021-04-30 山东华泰纸业股份有限公司 Comprehensive utilization method of waste residues of paper mill
CN112796144A (en) * 2020-12-28 2021-05-14 山东泗水金立得纸业有限公司 Method for recycling kaolin from sludge of carbon-free copy paper production line

Also Published As

Publication number Publication date
AU4680296A (en) 1997-02-18
JPH11510090A (en) 1999-09-07
FI980091A (en) 1998-01-16
RU2079454C1 (en) 1997-05-20
NO980210D0 (en) 1998-01-16
EP0842125A1 (en) 1998-05-20
KR19990028251A (en) 1999-04-15
CA2224683A1 (en) 1997-02-06
WO1997003928A1 (en) 1997-02-06
NO980210L (en) 1998-01-16
BR9609736A (en) 1999-12-21
FI980091A0 (en) 1998-01-16

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