CN102557367A - Method for recycling and safely disposing aluminum-salt containing coagulated sludge - Google Patents

Method for recycling and safely disposing aluminum-salt containing coagulated sludge Download PDF

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CN102557367A
CN102557367A CN2012100228362A CN201210022836A CN102557367A CN 102557367 A CN102557367 A CN 102557367A CN 2012100228362 A CN2012100228362 A CN 2012100228362A CN 201210022836 A CN201210022836 A CN 201210022836A CN 102557367 A CN102557367 A CN 102557367A
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sludge
mud
salt
printing
sewage
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CN2012100228362A
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CN102557367B (en
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耿金菊
任洪强
许柯
丁丽丽
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南京大学
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Abstract

The invention provides a method for recycling and safely disposing aluminum-salt containing coagulated sludge, comprising the following steps: recycling aluminum-salt containing textile dyeing sludge by adopting the acid leaching process, concentrating the aluminum-salt containing textile dyeing sludge under the force of gravity, pumping the aluminum-salt containing textile dyeing sludge into a sludge treating pool for treating, adding 0.5mol/L sulfuric acid, fully mixing to make the aluminum-salt containing textile dyeing sludge and the sulfuric acid react until the sludge and the water are layered, dewatering by using a centrifugal machine, recycling the recovered aluminum salt, adding acidic bentonite and heptahydrate ferrous sulfate, adding cement serving as the curing agent, fly ash and cinder into the separated textile dyeing sludge to cure the textile dyeing sludge, curing and maintaining the textile dyeing sludge, and landfilling sanitarily. The method has the advantages that pollutants can be sealed, the emission of pollutants can be reduced to the maximum extent, the physical and mechanical properties and the operating performance of the pollutants can be improved, the solubility of pollutants can be reduced, the recycling and the regeneration of the aluminum salt in the coagulated sludge is realized, the addition amount of the aluminum salt is reduced, and the aluminum-salt containing coagulated sludge can be recycled and disposed harmlessly. In addition, the method can be operated on site and has low cost.

Description

A kind of resource utilization of aluminate coagulating mud and safe disposal method
Technical field
The present invention relates to a kind of resource utilization and safe disposal method of aluminate coagulating mud, this method is applicable to the innoxious and recycling treatment of the aluminate coagulating mud that produces with the aluminum salt processing in the dyeing waste water.
Background technology
Printing and dyeing sludge is owing to contain dyestuff, slurry, auxiliary agent etc., and composition is very complicated, and wherein the structure of dyestuff has heavy metal elements such as nitro and aminocompound and copper, chromium, zinc, arsenic, has bigger bio-toxicity, and is very strong to the pollution of environment.The method of sludge disposal mainly contains landfill, burns, fills out sea and recycling at present.Printing and dyeing sludge after the dehydration owing to wherein contain a large amount of heavy metal ion and some other chemical agent, so and be not suitable for agricultural and soil utilization, in general can only carry out sanitary landfill and handle.
Printing and dyeing sludge belongs to high-moisture percentage (75%~85%), high organic, the very poor meta-alkalescence material of soil mechanical properties, and printing and dyeing sludge is with after rainwater mixes, and organicly flows out with percolate, follow-up percolate is handled caused disadvantageous effect.Aluminium salt in the printing and dyeing sludge mainly comes from adding of aluminum salt in the sewage treatment process.In with the process of aluminium salt, certainly lead to a large amount of aluminum chemistry mud that contain as coagulating agent.At present, generally be to carry out landfill for the treatment process of this printing and dyeing sludge, this kind method of disposal is easy generation of secondary pollution not only, and the landfill yard soil also is difficult for obtaining from now on.As far back as the seventies in 20th century, mud acidification technology has been applied to American market, and also there is application in Japan.Acidization reclaims the aluminium salt in the water purification mud; Not only can significantly reduce the quantity discharged of sewage sludge solid; The aluminum salt that reclaims can continue to be applied to the coagulating treatment process of trade effluent through regenerating, thereby utilization has very important significance to resources effective.Yet because the large usage quantity of acid receives certain restriction in the application.
Thereby must carry out the landfill of to march into the arena after stable curing is handled to the printing and dyeing sludge that contains aluminium salt.The stable curing method is a kind of cheapness, feasible sludge treatment technology; Can reduce the mud flowability, improve sludge intensity, stablize in the mud pollutent such as heavy metal; It not only can be used as the pretreatment process of mud sanitary landfill, ultimate disposal and utilization, and the solidified sludge bulking also can transfer soil material to and carries out resource utilization and utilize.
Summary of the invention
The objective of the invention is to deficiency to prior art; A kind of resource utilization and stable curing method that contains aluminate coagulating mud is provided; Realize recycling of aluminium salt; Reduce murder by poisoning pollutents such as holding a large amount of organic pollutants of containing and heavy metal in the aluminate coagulating mud, thereby make mud can satisfy the requirement of landfill yard landfill, and improve the environmental quality of sludge landfill.
The stable curing method of aluminate coagulating mud of the present invention is characterized in that this method comprises following operation steps:
(1) with acid leaching process aluminium salt printing and dyeing sludge is carried out recycling treatment, concrete grammar is the printing and dyeing sludge that contains aluminium salt to be pumped in the sludge treatment pond handle, and it is carried out gravity concentrate; To reduce the water ratio of mud; Dwindle the volume of mud, add the sulfuric acid that concentration is 0.5mol/L again, make the pH value of printing and dyeing sludge reach 3; Thorough mixing reacts to the muddy water layering; The aluminium salt recovery in the sewage of upper strata reaches more than 80%, adopts the mud after whizzer is carried acidleach to dewater, and separates in upper strata sewage to the other treating pond;
(2) with adding cement, flyash and cinder in the printing and dyeing sludge after separating in the step (1) as solidifying agent; The formation flco stirs; To solidify printing and dyeing sludge; Reduce heavy metal and COD concentration in the mud printing and dyeing leach liquor, the mass ratio of above-mentioned materials is a printing and dyeing sludge 1: cement 0.1~0.3: flyash 0.1~0.2: cinder 0.1~0.35;
(3) after stirring finishes above-mentioned mud is cleaned out the sludge treatment pond, place the square mould, divide three times filler, each filler must can carry out the filler second time, the demoulding in 24 hours after the mud moulding, the In Shade continuation maintenance of cured block after ram-jolt and compacting;
(4) Acidic Bentonite is ground into the 300-500 order; Input is from step (1) in the isolated sewage; Stir and it was mixed fully in 15 minutes, remove wherein solubility COD, the mass ratio of the Acidic Bentonite consumption of sewage and input is 1000: 1~1000: 10;
(5) in step (4), add an amount of iron vitriol in the sewage after the processing; Stir and it was dissolved fully in 15 minutes; The water quality of further purifying waste water, the mass ratio of the sewage after the processing and the iron vitriol of adding is 1000: 1, discharges the sewage after purifying treatment afterwards;
(6) treat that sludge curing piece maintenance in the step (2) after 5-7 days, carries out sanitary landfill to it.
Further, the mass ratio of each moity is a printing and dyeing sludge 1 in the step of this stable curing method (2): cement 0.2: flyash 0.15: cinder 0.2.
Further, the mass ratio of the Acidic Bentonite consumption of sewage and input is 1000: 5 in the step of this stable curing method (4).
Further, the curing time of sludge curing piece is 6 days in the step of this stable curing method (6).
Concentrating is in order to reduce the water ratio of mud, to dwindle the volume of mud, and adding concentration is the sulfuric acid of 0.5mol/L; It not only regulates pH, but also sulfate ion is provided, make it with printing and dyeing sludge in the aluminium composition be combined into the flocculation agent of solubility aluminum sulfate salt; Thereby reach the Tai-Ace S 150 that the aluminium composition that makes in the mud is converted into solubility; Thereby separate with mud, and to add the vitriol oil be thermopositive reaction, help aluminium stripping reaction; Aluminium salt recyclable regenerative after the stripping utilizes, so the present invention is preferably, and to add concentration be the sulfuric acid of 0.5mol/L.Through dehydration, can further dwindle the volume of mud.
Solidification and stabilization method is a kind of cheapness, feasible sludge treatment technology; Can reduce the mud flowability, improve sludge intensity, stablize in the mud pollutent such as heavy metal; It not only can be used as the pretreatment process of mud sanitary landfill, ultimate disposal and utilization, and the solidified sludge bulking also can transfer soil material to and carries out resource utilization and utilize.
Cement has good solidification effect to printing and dyeing sludge, the Ca (OH) that its hydration reaction produces 2, hydraulicity material such as ettringite and hydrated calcium silicate, make cured product have good mechanical property.But when utilizing cement treated to contain the mud of a large amount of organic pollutants, organic pollutant has hindered the hydration reaction of cement, solidification effect has been received seriously influence, as delay time of coagulation, intensity form to lag behind the Stability Failure of pollutent etc.The sludge curing piece has strong basicity simultaneously, and it contacts the water quality that can endanger the ecosystem with water body.
Can reduce above-mentioned disadvantageous effect and in treating processes, add other curing subsidiary material.Flyash and cinder are formed the novel solidifying agent mud of solidification treatment municipal sewage plant effectively as solidifying subsidiary material with cement.Flyash is that a kind of that coal dust forms behind high-temp combustion has mineral ion commutativity and adsorption and decoloration like pozzolana mixed material, can adsorb the pollution substance in the mud to a certain extent.SiO in flyash and the cinder 2And Al 2O 3Composition has activity under the excitation of alkali, generate the ettringite class material of silicates, and cured block intensity is increased.
It is low to utilize Acidic Bentonite to carry out cost of sewage disposal, and absorption is strong with flocculation ability, and the settling time is shorter.PH value in the iron vitriol adjustable alkaline water of suitable amounts organically combines with suspended substance in the water, and accelerate precipitation, purifies water.Through test of many times, the mass ratio of the sewage after the processing and the iron vitriol of adding is 1000: 5 among the present invention, can either guarantee the effect that purifies water to prevent to produce too much deposition again, influences the water treatment effect.Add Acidic Bentonite and iron vitriol sewage is handled, make its allow compliance with emission standards, avoid contaminate environment.
The stable curing method of this aluminate coagulating mud is handled printing and dyeing sludge through interpolation cement, flyash, cinder as solidifying agent; Formed cured block has the better physical mechanical property; Ultimate compression strength is 330kPa, and water ratio all remains on 44.6%, meets the landfill disposal requirement.Heavy metal and COD concentration are compared before solidifying in the mud leach liquor after curing simultaneously is stable; All have largely and reduce; Leaching toxicity in curing back satisfies national standard " the Hazardous wastes judging standard leaches toxicity and differentiates ", and (GB5085.3-2007), solidifying agent has fixed action preferably to pollutent such as heavy metal and COD in the mud.
The invention has the beneficial effects as follows: can seal pollutent, farthest reduce the release of pollutent, and improve the physico-mechanical properties and the processing property of refuse; Reduce the solubility of pollutent; Execute-in-place is feasible, and cost is low, realizes the recycling of aluminium salt in the coagulate sludge simultaneously; Reduce the dosage of aluminium salt, realize the innoxious and recycling treatment of aluminate coagulating mud synchronously.
Embodiment
Below by concrete embodiment technical scheme of the present invention is described further.Following examples do not constitute qualification of the present invention.
Embodiment 1
(1) with acid leaching process aluminium salt printing and dyeing sludge is carried out recycling treatment, concrete grammar is the printing and dyeing sludge that contains aluminium salt to be pumped in the sludge treatment pond handle, and it is carried out gravity concentrate; To reduce the water ratio of mud; Dwindle the volume of mud, add the sulfuric acid that concentration is 0.5mol/L again, make the pH value of printing and dyeing sludge reach 3; Thorough mixing reacts to the muddy water layering; The aluminium salt recovery in the sewage of upper strata reaches 80~90%, adopts whizzer that it is dewatered, and separates in upper strata sewage to the other treating pond;
(2) with adding cement, flyash and cinder in the printing and dyeing sludge after separating in the step (1) as solidifying agent; The formation flco stirs; To solidify printing and dyeing sludge; Reduce heavy metal and COD concentration in the mud printing and dyeing leach liquor, the mass ratio of above-mentioned materials is a printing and dyeing sludge 1: cement 0.1: flyash 0.1: cinder 0.1;
(3) after stirring finishes above-mentioned mud is cleaned out the sludge treatment pond, place the square mould, divide three times filler, each filler must can carry out the filler second time, the demoulding in 24 hours after the mud moulding, the In Shade continuation maintenance of cured block after ram-jolt and compacting;
(4) Acidic Bentonite is ground into 300 orders, drops into from step (1) in the isolated sewage, stir and it was mixed fully in 15 minutes, remove wherein solubility COD, the mass ratio of the Acidic Bentonite consumption of sewage and input is 1000: 1;
(5) in step (4), add an amount of iron vitriol in the sewage after the processing; Stir and it was dissolved fully in 15 minutes; The water quality of further purifying waste water, the mass ratio of the sewage after the processing and the iron vitriol of adding is 1000: 1, discharges the sewage after purifying treatment afterwards; Its complete allow compliance with emission standards can not have a negative impact to surrounding environment;
(6) treat that sludge curing piece maintenance in the step (2) after 5 days, carries out sanitary landfill to it.
(GB/T5086.2-1997) carry out stabilization front and back mud according to " solid waste leaches the horizontal succusion of toxicity leaching method " and leach toxicity test; The heavy metal concentration and the rapid sealing degestion that adopt ICP (inductively coupled plasma emmission spectrum) to measure in the leach liquor are measured COD concentration in the leach liquor; Test-results is seen table 1, solidifies back leaching toxicity and satisfies national standard " the Hazardous wastes judging standard leaches toxicity and differentiates " (GB5085.3-2007).
COD and heavy metal concentration (mg/L) in table 1 leach liquor
Annotate: L is not for detecting, and B is GB/T5086.2-1997.
Adopt pressure testing machine to measure cured block ultimate compression strength, the result sees table 2, meets landfill disposal and requires (landfill disposal>50kPa, banket processing>100kPa) of building.
Table 2 cured block ultimate compression strength
Embodiment 2
(1) with acid leaching process aluminium salt printing and dyeing sludge is carried out recycling treatment, concrete grammar is the printing and dyeing sludge that contains aluminium salt to be pumped in the sludge treatment pond handle, and it is carried out gravity concentrate; To reduce the water ratio of mud; Dwindle the volume of mud, add the sulfuric acid that concentration is 0.5mol/L again, make the pH value of printing and dyeing sludge reach 3; Thorough mixing reacts to the muddy water layering; The aluminium salt recovery in the sewage of upper strata reaches 80~97%, adopts whizzer that it is dewatered, and separates in upper strata sewage to the other treating pond;
(2) with adding cement, flyash and cinder in the printing and dyeing sludge after separating in the step (1) as solidifying agent; The formation flco stirs; To solidify printing and dyeing sludge; Reduce heavy metal and COD concentration in the mud printing and dyeing leach liquor, the mass ratio of above-mentioned materials is a printing and dyeing sludge 1: cement 0.2: flyash 0.15: cinder 0.2;
(3) after stirring finishes above-mentioned mud is cleaned out the sludge treatment pond, place the square mould, divide three times filler, each filler must can carry out the filler second time, the demoulding in 24 hours after the mud moulding, the In Shade continuation maintenance of cured block after ram-jolt and compacting;
(4) Acidic Bentonite is ground into 400 orders, drops into from step (1) in the isolated sewage, stir and it was mixed fully in 15 minutes, remove wherein solubility COD, the mass ratio of the Acidic Bentonite consumption of sewage and input is 1000: 5;
(5) in step (4), add an amount of iron vitriol in the sewage after the processing; Stir and it was dissolved fully in 15 minutes; The water quality of further purifying waste water, the mass ratio of the sewage after the processing and the iron vitriol of adding is 1000: 1, discharges the sewage after purifying treatment afterwards; Its complete allow compliance with emission standards can not have a negative impact to surrounding environment;
(6) treat that sludge curing piece maintenance in the step (2) after 6 days, carries out sanitary landfill to it.
(GB/T5086.2-1997) carry out stabilization front and back mud according to " solid waste leaches the horizontal succusion of toxicity leaching method " and leach toxicity test; The heavy metal concentration and the rapid sealing degestion that adopt ICP (inductively coupled plasma emmission spectrum) to measure in the leach liquor are measured COD concentration in the leach liquor; Test-results is seen table 3, solidifies back leaching toxicity and satisfies national standard " the Hazardous wastes judging standard leaches toxicity and differentiates " (GB5085.3-2007).
COD and heavy metal concentration (mg/L) in table 3 leach liquor
Annotate: L is not for detecting, and B is GB/T5086.2-1997.
Adopt pressure testing machine to measure cured block ultimate compression strength, the result sees table 4, meets landfill disposal and requires (landfill disposal>50kPa, banket processing>100kPa) of building.
Table 4 cured block ultimate compression strength
Embodiment 3
(1) with acid leaching process aluminium salt printing and dyeing sludge is carried out recycling treatment, concrete grammar is the printing and dyeing sludge that contains aluminium salt to be pumped in the sludge treatment pond handle, and it is carried out gravity concentrate; To reduce the water ratio of mud; Dwindle the volume of mud, add the sulfuric acid that concentration is 0.5mol/L again, make the pH value of printing and dyeing sludge reach 3; Thorough mixing reacts to the muddy water layering; The aluminium salt recovery in the sewage of upper strata reaches 80~97%, adopts whizzer that it is dewatered, and separates in upper strata sewage to the other treating pond;
(2) with adding cement, flyash and cinder in the printing and dyeing sludge after separating in the step (1) as solidifying agent; The formation flco stirs; To solidify printing and dyeing sludge; Reduce heavy metal and COD concentration in the mud printing and dyeing leach liquor, the mass ratio of above-mentioned materials is a printing and dyeing sludge 1: cement 0.3: flyash 0.2: cinder 0.35;
(3) after stirring finishes above-mentioned mud is cleaned out the sludge treatment pond, place the square mould, divide three times filler, each filler must can carry out the filler second time, the demoulding in 24 hours after the mud moulding, the In Shade continuation maintenance of cured block after ram-jolt and compacting;
(4) Acidic Bentonite is ground into 500 orders, drops into from step (1) in the isolated sewage, stir and it was mixed fully in 15 minutes, remove wherein solubility COD, the mass ratio of the Acidic Bentonite consumption of sewage and input is 1000: 10;
(5) in step (4), add an amount of iron vitriol in the sewage after the processing; Stir and it was dissolved fully in 15 minutes; The water quality of further purifying waste water, the mass ratio of the sewage after the processing and the iron vitriol of adding is 1000: 1, discharges the sewage after purifying treatment afterwards; Its complete allow compliance with emission standards can not have a negative impact to surrounding environment;
(6) treat that sludge curing piece maintenance in the step (2) after 7 days, carries out sanitary landfill to it.
(GB/T5086.2-1997) carry out stabilization front and back mud according to " solid waste leaches the horizontal succusion of toxicity leaching method " and leach toxicity test; The heavy metal concentration and the rapid sealing degestion that adopt ICP (inductively coupled plasma emmission spectrum) to measure in the leach liquor are measured COD concentration in the leach liquor; Test-results is seen table 5, solidifies back leaching toxicity and satisfies national standard " the Hazardous wastes judging standard leaches toxicity and differentiates " (GB5085.3-2007).
COD and heavy metal concentration (mg/L) in table 5 leach liquor
Annotate: L is not for detecting, and B is GB/T5086.2-1997.
Adopt pressure testing machine to measure cured block ultimate compression strength, the result sees table 6, meets landfill disposal and requires (landfill disposal>50kPa, banket processing>100kPa) of building.
Table 6 cured block ultimate compression strength
To those skilled in the art; Under this patent design and specific embodiment enlightenment, some distortion that can directly derive or associate from this patent disclosure and general knowledge, those of ordinary skills will recognize also can adopt additive method; Or the substituting of known technology commonly used in the prior art; And the unsubstantiality of the mutual various combination between characteristic or the like changes, and can be employed equally, can both realize this patent representation function and effect; Launch for example no longer one by one to describe in detail, all belong to this patent protection domain.

Claims (4)

1. the resource utilization of an aluminate coagulating mud and safe disposal method is characterized in that this method comprises following operation steps:
(1) with acid leaching process aluminium salt printing and dyeing sludge is carried out recycling treatment, concrete grammar is the printing and dyeing sludge that contains aluminium salt to be pumped in the sludge treatment pond handle, and it is carried out gravity concentrate; To reduce the water ratio of mud; Dwindle the volume of mud, add the sulfuric acid that concentration is 0.5mol/L again, make the pH value of printing and dyeing sludge reach 3; Thorough mixing reacts to the muddy water layering; The aluminium salt recovery in the sewage of upper strata reaches 80~90%, adopts whizzer that it is dewatered, and separates in upper strata sewage to the other treating pond;
(2) with adding cement, flyash and cinder in the printing and dyeing sludge after separating in the step (1) as solidifying agent; The formation flco stirs; To solidify printing and dyeing sludge; Reduce heavy metal and COD concentration in the mud printing and dyeing leach liquor, the mass ratio of above-mentioned materials is a printing and dyeing sludge 1: cement 0.1~0.3: flyash 0.1~0.2: cinder 0.1~0.35.
(3) after stirring finishes above-mentioned mud is cleaned out the sludge treatment pond, place the square mould, divide three times filler, each filler must can carry out the filler second time, the demoulding in 24 hours after the mud moulding, the In Shade continuation maintenance of cured block after ram-jolt and compacting;
(4) Acidic Bentonite is ground into the 300-500 order; Input is from step (1) in the isolated sewage; Stir and it was mixed fully in 15 minutes, remove wherein solubility COD, the mass ratio of the Acidic Bentonite consumption of sewage and input is 1000: 1~1000: 10;
(5) in step (4), add an amount of iron vitriol in the sewage after the processing; Stir and it was dissolved fully in 15 minutes; The water quality of further purifying waste water, the mass ratio of the sewage after the processing and the iron vitriol of adding is 1000: 1, discharges the sewage after purifying treatment afterwards;
(6) treat that sludge curing piece maintenance in the step (2) after 5-7 days, carries out sanitary landfill to it.
2. the stable curing method of aluminate coagulating mud according to claim 1 is characterized in that the mass ratio of each moity in the step (2) of this stable curing method is a printing and dyeing sludge 1: cement 0.2: flyash 0.15: cinder 0.2.
3. according to the stable curing method of the described aluminate coagulating mud of claim 1-2, it is characterized in that the mass ratio of the Acidic Bentonite consumption of sewage and input in the step (4) of this stable curing method is 1000: 5.
4. according to the stable curing method of the described aluminate coagulating mud of claim 1-3, it is characterized in that the curing time of the middle sludge curing piece of step (6) of this stable curing method is 6 days.
CN 201210022836 2012-02-02 2012-02-02 Method for recycling and safely disposing aluminum-salt containing coagulated sludge CN102557367B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104692602A (en) * 2015-02-13 2015-06-10 南京大学 Aluminum salt cyclic hardening regeneration system for coagulated sludge and method of processing coagulated sludge
CN104773785A (en) * 2015-04-30 2015-07-15 长安大学 Method for removing fluorinion in water body
CN107628742A (en) * 2017-11-01 2018-01-26 葛洲坝中固科技股份有限公司 A kind of method of Chemical Pretreatment solidification and stabilization press filtration processing leather-making mud

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JP2000140890A (en) * 1998-11-10 2000-05-23 Nec Corp Method and device for decreasing insoluble aluminum compound in waste water treatment
CN1532148A (en) * 2003-03-25 2004-09-29 顾永明 Method for recovering coagulant from aluminium containing mud
CN101693540A (en) * 2009-10-19 2010-04-14 中国地质大学(武汉) Method for preparing modified bentonite flocculating agent
CN101885575A (en) * 2010-07-02 2010-11-17 广东工业大学 Solidification/stabilization treatment method for papermaking sludge
CN101979350A (en) * 2010-11-01 2011-02-23 江苏宜净环保有限公司 Physical and chemical sludge recycling and reducing method

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Publication number Priority date Publication date Assignee Title
JP2000140890A (en) * 1998-11-10 2000-05-23 Nec Corp Method and device for decreasing insoluble aluminum compound in waste water treatment
CN1532148A (en) * 2003-03-25 2004-09-29 顾永明 Method for recovering coagulant from aluminium containing mud
CN101693540A (en) * 2009-10-19 2010-04-14 中国地质大学(武汉) Method for preparing modified bentonite flocculating agent
CN101885575A (en) * 2010-07-02 2010-11-17 广东工业大学 Solidification/stabilization treatment method for papermaking sludge
CN101979350A (en) * 2010-11-01 2011-02-23 江苏宜净环保有限公司 Physical and chemical sludge recycling and reducing method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104692602A (en) * 2015-02-13 2015-06-10 南京大学 Aluminum salt cyclic hardening regeneration system for coagulated sludge and method of processing coagulated sludge
CN104692602B (en) * 2015-02-13 2016-08-17 南京大学 A kind of coagulation mud aluminium salt cyclic hardening regenerative system and the method processing coagulation mud
CN104773785A (en) * 2015-04-30 2015-07-15 长安大学 Method for removing fluorinion in water body
CN107628742A (en) * 2017-11-01 2018-01-26 葛洲坝中固科技股份有限公司 A kind of method of Chemical Pretreatment solidification and stabilization press filtration processing leather-making mud

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