CN102633424A - Sludge dewatering method - Google Patents
Sludge dewatering method Download PDFInfo
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- CN102633424A CN102633424A CN2012100286476A CN201210028647A CN102633424A CN 102633424 A CN102633424 A CN 102633424A CN 2012100286476 A CN2012100286476 A CN 2012100286476A CN 201210028647 A CN201210028647 A CN 201210028647A CN 102633424 A CN102633424 A CN 102633424A
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- Prior art keywords
- mud
- sludge
- phosphoric acid
- slaked lime
- waste water
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- 239000010802 sludge Substances 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 26
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 49
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 49
- 235000011116 calcium hydroxide Nutrition 0.000 claims abstract description 49
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 49
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000002351 wastewater Substances 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 239000001506 calcium phosphate Substances 0.000 claims abstract description 15
- 229910000389 calcium phosphate Inorganic materials 0.000 claims abstract description 15
- 235000011010 calcium phosphates Nutrition 0.000 claims abstract description 15
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 15
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 claims abstract description 15
- 239000002699 waste material Substances 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 238000005530 etching Methods 0.000 claims abstract description 6
- 150000007524 organic acids Chemical class 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims description 35
- 230000018044 dehydration Effects 0.000 claims description 27
- 238000006297 dehydration reaction Methods 0.000 claims description 27
- UUVBYOGFRMMMQL-UHFFFAOYSA-N calcium;phosphoric acid Chemical compound [Ca].OP(O)(O)=O UUVBYOGFRMMMQL-UHFFFAOYSA-N 0.000 claims description 19
- 150000001398 aluminium Chemical class 0.000 claims description 13
- 239000000701 coagulant Substances 0.000 claims description 10
- 230000001112 coagulating effect Effects 0.000 claims description 6
- 239000012065 filter cake Substances 0.000 abstract description 8
- 239000010815 organic waste Substances 0.000 abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000007787 solid Substances 0.000 description 5
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 239000012488 sample solution Substances 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 206010034719 Personality change Diseases 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 239000010786 composite waste Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- Treatment Of Sludge (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention aims to provide a sludge dewatering method which helps to improve a dewatering property through addition of a small amount of slaked lime while enabling the amount of a dewatering sludge filter cake not to be increased. According to the sludge dewatering method, a dewatering device is adopted to dewater mixed sludge of excess sludge and sludge containing calcium phosphate, generated during treatment of organic waste water. The method is characterized in that 100~2000mg/L slaked lime is added into the mixed sludge for dewatering. The organic waste water refers to developing waste liquid, resist stripping waste water, organic acid etching waste water and the like in a liquid crystal device manufacturing factory. The sludge containing calcium phosphate is generated through phosphoric acid insoluble treatment of phosphoric acid etching waste water by using slaked lime in the liquid crystal device manufacturing factory, etc.
Description
Technical field
The present invention relates to a kind of mud dewatering method, especially relate to a kind of unnecessary mud that is produced in the active sludge treatment of organic wastewater and mixing sludge that contains the mud of calcium phosphate of being directed against and carry out dehydration method.
Background technology
The unnecessary mud that is produced when organic wastewaters such as sewage are carried out active sludge treatment is because its dehydration property is poor, so in most cases carrying out dewatering through water extracter after the coagulating treatment with coagulating agent.For example, a kind of technical scheme of in mud, adding iron(ic)chloride and slaked lime and adopting pressure filter to dewater is disclosed in patent documentation 1.In patent documentation 1, for adding proportion, be 1.58% unnecessary mud with respect to sludge concentration, iron(ic)chloride is 10%, and (weight %, down with), slaked lime are 10% (embodiment 2); With respect to sludge concentration is 2.54% unnecessary mud, and iron(ic)chloride is 12%, slaked lime is 45% (embodiment 3).
The prior art document
Patent documentation
Patent documentation 1: japanese kokai publication hei 6-99200 number
Summary of the invention
The slaked lime amount of adding when as stated, in the past adopting water extracter to be directed against the mud that is produced in the active sludge treatment of organic wastewater to dewater nearly 10～45%.Therefore, the problem that amount increases and the filter cake handling increases that has the dewatered sludge filter cake.The object of the present invention is to provide a kind of can be through adding a small amount of slaked lime improves dehydration property under the situation that the amount that does not make the dewatered sludge filter cake increases mud dewatering method.
The mud dewatering method of technical scheme 1 of the present invention; It adopts water extracter to be directed against unnecessary mud that organic wastewater produces and the mixing sludge that contains the phosphoric acid calcium mud of calcium phosphate when active sludge treatment to dewater; It is characterized in that the slaked lime that in this mixing sludge, adds 100～2000mg/L dewaters.
The mud dewatering method of technical scheme 2 of the present invention, it is in technical scheme 1 described mud dewatering method, adds the slaked lime of 200～500mg/L.
The mud dewatering method of technical scheme 3 of the present invention; It is in technical scheme 1 or 2 described mud dewatering methods; Organic wastewater is meant that development waste liquid, the resist of liquid-crystal display manufacturing works peel off at least a in waste water and the organic acid etching waste water, and phosphoric acid calcium mud is meant with slaked lime the phosphoric acid etch waste water of these liquid-crystal display manufacturing works is carried out the phosphoric acid calcium mud that phosphoric acid does not produce in the dissolving treatment procedures.
The mud dewatering method of technical scheme 4 of the present invention; It is in technical scheme 3 described mud dewatering methods, said unnecessary mud, said phosphoric acid calcium mud with from adopt aluminium class coagulating agent to through slaked lime the phosphoric acid etch waste liquid is carried out phosphoric acid not the dehydration filtrating of active sludge treatment water and the said mixing sludge of the treating water during the dissolving processing, organic wastewater carry out that the said slaked lime of interpolation dewaters in the mixing sludge of coagulate sludge of operation of coagulating treatment.
The dehydration property of the unnecessary mud that in the active sludge treatment of organic wastewater, produces is poor, but it is good to contain the dehydration property of mud of calcium phosphate.Therefore, through mixing unnecessary mud and the mud that contains calcium phosphate, can improve the dehydration property of mud.In the present invention, to the mixing sludge of this unnecessary mud and phosphoric acid calcium mud, add the slaked lime of 100～2000mg/L.So carry out,, can find that the dehydration property of mixing sludge is significantly increased to make dehydration property have the mixing sludge that improves to a certain degree to add a small amount of slaked lime through calcium phosphate.The present invention accomplishes with regard to being based on above-mentioned opinion.
Description of drawings
Fig. 1 is expression embodiment result and comparative example result's a graphic representation.
Fig. 2 is expression embodiment result and comparative example result's a graphic representation.
Fig. 3 is expression embodiment result and comparative example result's a graphic representation.
Embodiment
Below, further explain the present invention.
In the present invention; Add in the unnecessary mud that when the active sludge treatment of organic wastewater, produces and the mixing sludge of mud that contains calcium phosphate 100～2000mg/L slaked lime (, mixing sludge is added slaked lime so that add slaked lime concentration in the mud of back and become 100～2000mg/L) and dewater.Therefore, the present invention preferably be applicable to organic wastewater active sludge treatment in the waste water treatment process that phosphoric acid calcium mud produces.As above-mentioned waste water treatment process, can enumerate the treatment process of waste water in the electronic unit manufacturing processes such as liquid-crystal display.
In liquid-crystal display manufacturing works,, carry out active sludge treatment and produce unnecessary mud to organic waste liquids such as development waste liquid, resist stripping waste liquor, organic acid etching waste liquors.In addition, adopt slaked lime, the phosphoric acid etch waste liquid is carried out not dissolving processing of phosphoric acid, produce the mud that contains calcium phosphate.
The blending ratio of unnecessary mud and phosphoric acid calcium mud; Preferred phosphoric acid calcium mud is 70～95 weight parts as solid state component with respect to 100 weight part mixing sludge solid state components; Be preferably 80～92 weight parts especially, especially be preferably about 85～90 weight parts.In addition; The concentration of the unnecessary mud that usually in the active sludge treatment of liquid-crystal display manufacturing works waste water, is produced is about 0.6～1.5 weight %, is about 20～30 weight % in the concentration of the phosphoric acid calcium mud that uses slaked lime that phosphoric acid etch waste water is not produced in the dissolving treatment process.As far as both volume mixture ratios, calcium phosphate mud is generally about 10～40 volume %, and the concentration of mixing sludge is generally 3～12 weight %, is in particular about 5～10 weight %.
When the present invention is applied to the processing of liquid-crystal display manufacturing works waste water; Can be with the unnecessary mud and phosphoric acid calcium mud of organic property active sludge treatment the two mix and form mixing sludge; After also can adding the coagulate sludge of going up aluminium class coagulating agent such as using PAC (Poly aluminum Chloride (PAC)), Tai-Ace S 150 and generating again this three is mixed the formation mixing sludge, after in above-mentioned mixing sludge, adding slaked lime, carry out processed.The coagulate sludge that adopts this aluminium class coagulating agent to be produced is meant and adopts aluminium class coagulating agent to slaked lime the phosphoric acid etch waste liquid being carried out the not dehydration of active sludge treatment water and the above-mentioned mixing sludge of the treating water during the dissolving processing, the organic wastewater mud of filtrating and producing when carrying out coagulating treatment of phosphoric acid.
To above-mentioned both or three or and then add other mud and the mixing sludge that forms, add the slaked lime of 100～2000mg/L.This addition is about about 0.3～2.6 weight % with respect to the mud solid state component amount of mixing sludge, is common below 1/10 of slaked lime addition in the past.In addition, the preferred addition of slaked lime is 100～1000mg/L, is preferably 200～600mg/L especially, especially is preferably 200～500mg/L.In addition, preferred so that add pH behind the slaked lime and become 10～11 mode and set the slaked lime addition.
Slaked lime both can be used as the powder interpolation and also can be used as the slurry interpolation.The interpolation place of slaked lime both can also can be from the way in the sludge carrier pipe road of storage tank to water extracter at the storage tank of mixing sludge.
As water extracter, adopt the water extracter arbitrarily in pressure filter (filter press), belt press (belt press), centrifuge, electroosmotic dewatering machine, screw press, the many disk filters etc. all can.
As the addition of slaked lime, can in above-mentioned scope, regulate based on the dehydration property (for example, filter cake moisture content after the processed or mud separability) of the mixing sludge behind the interpolation slaked lime.
Based on the present invention, through adding a small amount of slaked lime, the dehydration property of mud significantly improves as stated, and therefore, the increase of dewatered sludge filter cake amount is also considerably less.Even also improve the reason of dehydration property less about the addition of slaked lime, do not obtain fully clearly as yet, but infer it possibly is because the result who reacts with certain mode between calcium phosphate in the mixing sludge and the slaked lime.
As stated, preferred the present invention is applicable to the processing of liquid-crystal display manufacturing works waste water.
In liquid crystal manufacturing works; The mixing sludge that adopts pressure filter that the coagulate sludge that is mixed with phosphoric acid calcium mud, produced based on aluminium class coagulating agent and the unnecessary mud of organic property are formed dewaters, but its mixture ratio every day changes according to the manufacturing state on the same day.When the ratio of above-mentioned organic type of mud increased, dehydration property deterioration in most cases for example, was difficult to peel off mud or water ratio uprises from filter cloth sometimes, can't obtain sludge filter cake when serious and directly discharged with aqueous form.
Usually; In place's retention basin, store and carry out pressure filter when dehydration when the mud with a plurality of treatment systems stockpiles as mixing sludge; The mud amount of stockpiling of each treatment system changes according to operating condition at that time, and sludge character also changes day by day to some extent under this influence.As far as dehydration proterties based on water extracter, also receive the influence that this sludge character changes, the water ratio that can produce filter cake increases considerably the separability deterioration of perhaps peeling off from filter cloth.
When dehydration proterties generation deterioration, the sludge quantity of discharging from each treatment system through adjusting basically waits and solves reply, but also is difficult to sometimes regulate through treatment system.
Based on the present invention, the dehydration property of the mixing sludge of the unnecessary mud of organic property active sludge treatment and phosphoric acid calcium mud significantly improves, and also can fully reduce the water ratio of dewatered cake even the proterties of each mud changes.
In addition, the present invention can also be applicable to the processed from the mud that wastewater treatment produced beyond the liquid-crystal display manufacturing works waste water.
Embodiment
Below, describe to embodiment and comparative example.
[embodiment 1～3, comparative example 1]
Through using small-sized water extracter, judge that the dehydration property when in the mixing sludge that is mixed by following mud, adding Powdered slaked lime improves effect: the composite waste that development waste-water, the resist of liquid-crystal display manufacturing works are peeled off waste water and organic acid etching waste water carries out the unnecessary mud of active sludge treatment; From the phosphoric acid that the phosphoric acid etch waste water of these liquid-crystal display manufacturing works is carried out through the slaked lime phosphoric acid calcium mud of dissolving treatment process not; And adopt aluminium class coagulating agent and the coagulating treatment mud that produces.Adopt the coagulate sludge that this aluminium class coagulating agent produced (below; Sometimes also claim " aluminium class coagulate sludge "), be meant and adopt PAC (Poly aluminum Chloride (PAC)) to the phosphoric acid etch waste liquid being carried out the not dehydration of active sludge treatment water and the above-mentioned mixing sludge of the treating water during the dissolving processing, the organic wastewater mud of filtrating and being produced when carrying out coagulating treatment of phosphoric acid with slaked lime.
In addition, SS (suspended solids) concentration in the above-mentioned unnecessary mud is that 0.9 weight %, VSS/SS are about 0.90 (wherein SS is that " suspended solids ", VSS are " VSS ").The SS concentration of phosphoric acid calcium mud is that 22 weight %, VSS/SS are about 0.05, P
2O
5/ SS is that about 0.38, CaO/SS is about 0.52.The SS concentration that adopts the coagulate sludge that aluminium class coagulating agent produced is that 3 weight %, VSS/SS are that about 0.35, Al/SS is about 0.1.
The specification and the operating condition of small-sized water extracter are as follows.
Filtration area: 100cm
2(one plane type)
Filter thickness: 15mm
Chamber space: 150cm
3
Use filter cloth: nylon-type filter cloth, monofilament braiding
Filter pressure: 0.4MPa
Filtration time: 40 minutes
Squeeze pressure: 0.3MPa
The squeezing time: 40 minutes
According to the unnecessary mud of the mixed of table 1, phosphoric acid calcium mud (below; Sometimes be designated as " calcium phosphate mud ") and aluminium class coagulate sludge; The addition of setting slaked lime is 0mg/L, 250mg/L, 500mg/L, 1000mg/L or 2000mg/L, and measures the water ratio and average filtration velocity of the dewatered cake when adopting above-mentioned small-sized water extracter to dewater.
Table 1
(in embodiment 1～3 and comparative example 1, be: unnecessary mud/aluminium class coagulate sludge=45/55 volume ratio)
The result is shown among Fig. 1,2.The graphic representation that will mark as parameter with the data medium-slaking lime adding proportion (0mg/L, 250mg/L or 500mg/L) of Fig. 1 in addition, is shown among Fig. 3.In addition, the pH with mixing sludge behind the interpolation slaked lime is shown in Table 2.
The relation of table 2 slaked lime adding proportion and pH
Like Fig. 1, shown in 2, through adding 100～2000mg/L, particularly 200～1000mg/L, the especially slaked lime about 200～500mg/L, the water ratio of dewatered cake is fully reduced, filtration velocity also increases.In addition, as shown in Figure 3, the ratio of calcium phosphate mud is high more, and then the water ratio of dewatered cake is low more.
The dehydration property of mixing sludge test when replacing slaked lime with NaOH
In the mixing sludge of the aluminium class coagulate sludge of the calcium phosphate mud of the above-mentioned unnecessary mud that is mixed with 30 weight %, 34 weight % and 36 weight %, add slaked lime or NaOH, measured the dehydration property and the turbidity of the mud behind the interpolation alkali when pH carried out various the change.As NaOH, used the aqueous solution of 5 weight %.As the desired value of dehydration property, used CST (capillary suction time) value.As turbidity, use path length to measure as the cuvette (cell) of 20mm and through the 660nm wavelength.
The CST value is to be employed in the value that disposes many measuring instruments to the pair of electrodes contact on the two sides that is clipped in filter paper (CST meter) on the above-below direction of filter paper and measured (Capillary Suction Time (capillary suction time): second).This CST value is measured through following mode.The filter paper front end (tip) of above-mentioned CST meter impregnated in the sample solutions such as primary sludge or dehydration filtrating.At this moment, according to capillary phenomenon, sample solution is drunk up, but if the position that rises to electrode contact then two interpolars can be in switch-on regime.Thereby, through measuring sample solution through too much time between the counter electrode contact, translational speed that can test samples solution, and can grasp the proterties of sample solution according to the size of this time.This elapsed time is CST value and the dehydration property index that becomes mud.The result of this test is shown in Table 3.
Table 3
(※) add the 5 weight % aqueous solution and regulate pH
As shown in table 3, replace slaked lime if add NaOH, then cause the CST value to increase along with the increase of NaOH addition, dehydration property reduces.
Claims (4)
1. mud dewatering method, it adopts water extracter to be directed against organic wastewater unnecessary mud that when active sludge treatment, produces and the mixing sludge that contains the phosphoric acid calcium mud of calcium phosphate to dewater, it is characterized in that,
The slaked lime that in this mixing sludge, adds 100～2000mg/L dewaters.
2. mud dewatering method as claimed in claim 1 is characterized in that,
Add the slaked lime of 200～500mg/L.
3. according to claim 1 or claim 2 mud dewatering method is characterized in that,
Organic wastewater is meant that development waste liquid, the resist of liquid-crystal display manufacturing works peel off at least a in waste water and the organic acid etching waste water,
Phosphoric acid calcium mud is meant with slaked lime the phosphoric acid etch waste water of these liquid-crystal display manufacturing works is carried out the phosphoric acid calcium mud that phosphoric acid does not produce in the dissolving treatment procedures.
4. mud dewatering method as claimed in claim 3 is characterized in that,
Said unnecessary mud, said phosphoric acid calcium mud with from adopt aluminium class coagulating agent to through slaked lime the phosphoric acid etch waste liquid is carried out phosphoric acid not the dehydration filtrating of active sludge treatment water and the said mixing sludge of the treating water during the dissolving processing, organic wastewater carry out that the said slaked lime of interpolation dewaters in the mixing sludge of coagulate sludge of operation of coagulating treatment.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-026943 | 2011-02-10 | ||
| JP2011026943A JP5828208B2 (en) | 2011-02-10 | 2011-02-10 | Sludge dewatering method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102633424A true CN102633424A (en) | 2012-08-15 |
| CN102633424B CN102633424B (en) | 2016-03-23 |
Family
ID=46618026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210028647.6A Expired - Fee Related CN102633424B (en) | 2011-02-10 | 2012-02-07 | Mud dewatering method |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5828208B2 (en) |
| CN (1) | CN102633424B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103011549A (en) * | 2013-01-14 | 2013-04-03 | 杭州万得斯环保科技有限公司 | Efficient inorganic environment-friendly conditioner for deep dewatering of sludge |
| CN104692609A (en) * | 2013-12-06 | 2015-06-10 | 赵雪莲 | Soil-water mixture dispensing method applicable to vacuum dehydration |
| RU2576202C2 (en) * | 2014-07-15 | 2016-02-27 | Сивун Игорь Викторович | Method for processing sludge waste |
| CN111748819A (en) * | 2020-06-18 | 2020-10-09 | 河海大学 | Rust inhibitor prepared from phosphorus-containing sludge, and preparation method and application thereof |
| CN117023944A (en) * | 2023-10-08 | 2023-11-10 | 杭州尚善若水环保科技有限公司 | Sludge mixing dehydration method in LCD manufacturing industry |
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| JP7107714B2 (en) * | 2018-03-24 | 2022-07-27 | 株式会社日吉 | Slurry property measuring device and slurry property measuring method |
| CN115259597A (en) * | 2022-08-01 | 2022-11-01 | 无锡国联环保科技股份有限公司 | Acid-base type pyrohydrolysis method and system for municipal sludge |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103011549A (en) * | 2013-01-14 | 2013-04-03 | 杭州万得斯环保科技有限公司 | Efficient inorganic environment-friendly conditioner for deep dewatering of sludge |
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| CN104692609A (en) * | 2013-12-06 | 2015-06-10 | 赵雪莲 | Soil-water mixture dispensing method applicable to vacuum dehydration |
| RU2576202C2 (en) * | 2014-07-15 | 2016-02-27 | Сивун Игорь Викторович | Method for processing sludge waste |
| CN111748819A (en) * | 2020-06-18 | 2020-10-09 | 河海大学 | Rust inhibitor prepared from phosphorus-containing sludge, and preparation method and application thereof |
| CN117023944A (en) * | 2023-10-08 | 2023-11-10 | 杭州尚善若水环保科技有限公司 | Sludge mixing dehydration method in LCD manufacturing industry |
| CN117023944B (en) * | 2023-10-08 | 2024-01-23 | 杭州尚善若水环保科技有限公司 | Sludge mixing dehydration method in LCD manufacturing industry |
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| CN102633424B (en) | 2016-03-23 |
| JP5828208B2 (en) | 2015-12-02 |
| JP2012166117A (en) | 2012-09-06 |
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