CN102381827A - Sludge dehydration assistant, sludge dehydration method and sludge dehydration apparatus - Google Patents
Sludge dehydration assistant, sludge dehydration method and sludge dehydration apparatus Download PDFInfo
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- CN102381827A CN102381827A CN2011102588298A CN201110258829A CN102381827A CN 102381827 A CN102381827 A CN 102381827A CN 2011102588298 A CN2011102588298 A CN 2011102588298A CN 201110258829 A CN201110258829 A CN 201110258829A CN 102381827 A CN102381827 A CN 102381827A
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- 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
- C02F11/147—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using organic substances
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/02—Loose filtering material, e.g. loose fibres
- B01D39/04—Organic material, e.g. cellulose, cotton
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- 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
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- 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
- C02F11/125—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using screw filters
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- 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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
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- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/20—Sludge processing
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
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- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Sludge (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The present invention provides a sludge dehydration assistant, a sludge dehydration method and a sludge dehydration apparatus, wherein the dehydration assistant is used for performing dehydration processing on the sludge difficult to be dehydrated, generated by a draining processing device, characterized in that the sludge dehydration assistant is formed by a plurality of fibers, on the peripheral face of each fiber there are provided 5-20 concave portions extending along the length direction of the fiber, and stripes extend along the length direction of the fiber inside the concave portions. When the sludge is contacted with the dehydration assistant, the stripes can play an effect of a water transporting passage for transporting the water by using capillarity.
Description
Technical field
The dewatering and the sludge dehydration device of the chemical conditioner that uses when the present invention relates to that the mud that produces from the dirty treatment facility of effluent sewerage treatment facility, excrement, other draining treatment facilities carried out processed, the mud that uses this chemical conditioner.
Background technology
In the past, mud that dirty treatment facility, other draining treatment facilities from effluent sewerage treatment facility, excrement produce (below be called " mud "), add organic high-molecular coagulant and carry out the mechanical dehydration processing.But the variation of mode of life in recent years etc. makes mud have difficult dehydration property, handles even therefore carry out mechanical dehydration, also is difficult to reduce the water ratio of mud.Particularly, compare the non-constant of dehydration property of the mud of handling with oxidation ditch process with the excess sludge that mixes raw sludge, active sludge, digested sludge etc.Can think this be because: therefore aeration time is very long in oxidation ditch process, carries out nitrated-denitrification, and considerable fibre composition is decomposed in the mud, and the fibre composition that becomes the nucleus of condensation in the mud reduces.Also have, under the situation of using belt squeezing dewatering machine, this adding pressure type water extracter of filter pressing dehydrator, the separability that dehydrated sludge cake is peeled off from filter cloth is poor; Stop up filter cloth; Therefore cause that filtration is bad, not only can not carry out stable dehydration, also have the problem that filter cloth will take long to of cleaning.
In the dirty treatment facility of excrement, because utilize the filtering net that is located at the biological treatment last stage, in mud, remove most impurity, so fibre composition tails off in the mud that produces, be difficult to reduce the water ratio of mud.
In addition, from the viewpoint that waste utilizes again, the composting of mud has obtained progress.Under the situation of carrying out composting, need the water ratio of object mud be dropped to 40%～60%.In addition, for composting, the medicament that in processed, uses etc. need have biological degradability (can with microbiological degradation).
As the means of the water ratio that reduces mud, proposing has following method: in mud, behind the blend fiber shape thing, add polymer coagulant again and dewater.For example propose to have and in organic sludge, add the method (jp patent publication spy opens the 2002-219500 communique) of carrying out processed behind synthon and the condensing agent etc.Compare with the method for more in the past interpolation waste paper cutting object, this method uses a small amount of addition also can obtain the low dehydrated sludge cake of water ratio.
In mud, mix the method for synthon, can reduce moisture content of the cake to a certain degree.But.According to discovering of the inventor; Synthon to the inadequate situation of the wettability of mud under; If to not having the middle synthon that drop into such as mud storagetank that can fully stir the device in the whole groove; Then in mud, be difficult to out fibre, can not synthon be mixed in the mud equably.Find that in addition even can synthon be mixed in the mud equably, when in water extracter, squeezing, synthon separate from mud, can not help dehydration, therefore can not carry out stable processed.In addition, among fibrous material, there is the material that is difficult to microbiological degradation, also is not suitable for composting sometimes.
In addition, inventor's result of study finds that though its reason is indeterminate, known synthon can not get reducing the effect of moisture content of the cake sometimes basically according to sludge nature, add the solution that synthon do not reach essence just.
As above-mentioned, just studying the technology of using synthon to reduce the water ratio of dehydrated sludge cake.But prior art mostly is to reduce water ratio through starting material, thickness and the length of regulating synthon.But inventor's result of study is found, if starting material, thickness and the length of just merely regulating synthon even difficult dehydration property mud is carried out mechanical dehydration, can not fully reduce the water ratio of dehydrated sludge cake.
Patent documentation: TOHKEMY 2002-219500 communique.
Summary of the invention
The problem that invention will solve
The object of the present invention is to provide a kind of shortcoming that solves above-mentioned known technology and can from difficult dehydration property mud obtain the low dehydrated sludge cake of water ratio chemical conditioner, use the dewatering and the sludge dehydration device of the mud of this chemical conditioner.
The scheme that is used to deal with problems
In order to address the above problem, the result of the wholwe-hearted research of the inventor finds that the cross-sectional shape of fiber can influence the dehydration property of mud.The present invention is based on this discovery and the new sludge dewatering method accomplished.
The inventor finds, uses with chemical conditioner as mud along the fibrous material of fibre axis to the successive streak if having jog at 5～20 places and have above-mentioned recess continuously with filamentary cross-sectional circumference portion, and then the dehydration rate of mud rises.Constituting on the xsect of mud with each fiber of chemical conditioner, there are 5～20 jogs at peripheral part.In recess, be striped to the length direction successive streak that is fiber along fibre axis.
Thereby; The present invention provides a kind of mud to use chemical conditioner, it is characterized in that, above-mentioned mud is formed by many fibril aggregations with chemical conditioner; On the periphery of each fiber, there are 5～20 recesses that extend along the length direction of fiber; Length direction along fiber in above-mentioned recess is extended with striped, and when mud contacted with chemical conditioner with above-mentioned mud, this striped played the effect that utilizes capillary action to carry the moisture transfer passage of moisture.
Above-mentioned mud with chemical conditioner in, preferably, above-mentioned fiber is a regenerated cellulose fibre.Preferably, above-mentioned fiber is not a dryness, and water ratio is in the scope of 30 quality %～80 quality %.In addition, preferably, the length of fiber is 1mm～50mm, and Fibre diameter is 1 μ m～100 μ m.
The present invention provides a kind of dewatering that uses above-mentioned mud with the mud of chemical conditioner.Mud dewatering method of the present invention comprises following mode: with above-mentioned mud with chemical conditioner add in the organic sludge mix after, add polymer coagulant organic sludge condensed, afterwards mechanical dehydration; With after containing chemical conditioner polymer coagulant liquid and adding in the organic sludge, organic sludge is condensed, carry out mechanical dehydration afterwards, the above-mentioned chemical conditioner polymer coagulant liquid mixing sludge that contains forms with chemical conditioner and polymer coagulant; , above-mentioned mud is added in the organic sludge with chemical conditioner and polymer coagulant simultaneously, organic sludge is condensed, carry out mechanical dehydration afterwards.
In addition, the present invention provides a kind of sludge dehydration device that uses above-mentioned mud organic sludge to be carried out mechanical dehydration with chemical conditioner.Sludge dehydration device of the present invention comprises: the mud storagetank; Coagulating bath; The mechanical dehydration machine; The chemical conditioner dispenser device, it is used for above-mentioned mud is fed to organic sludge with chemical conditioner; And the polymer coagulant dissolver, it is used for dissolving the polymer coagulant that is fed to above-mentioned coagulating bath.Above-mentioned chemical conditioner dispenser device via with pipe connection at least one in above-mentioned mud storagetank, above-mentioned coagulating bath, above-mentioned mechanical dehydration machine and above-mentioned polymer coagulant dissolver.Above-mentioned polymer coagulant dissolver is connected in above-mentioned coagulating bath via pipe arrangement.
In sludge dehydration device of the present invention, also can be to be provided with mud in the last stage of above-mentioned mud storagetank and to concentrate trough.Also can be that above-mentioned mud concentrates trough and is connected in above-mentioned chemical conditioner dispenser device.In addition, in sludge dehydration device of the present invention, also can be that the equipment for separating liquid from solid of one group of ellipse with rotation or the filtering and concentrating portions such as filter screen of tilting downwards from the coagulating bath outlet are set between above-mentioned coagulating bath and above-mentioned mechanical dehydration machine.At sludge dehydration device of the present invention, preferably, use spiral pressing dehydrator as above-mentioned mechanical dehydration machine.
The effect of invention
According to the present invention; Through using the sludge dewatering auxiliary agent that constitutes by fiber with special cross-sectional shape; Even under the situation of the mud of difficult dehydration property, compare with the method for adding synthon in the past, can reduce the water ratio of dehydrated sludge cake with a spot of addition well.In addition, the sludge dewatering auxiliary agent of the application of the invention under the situation of carrying out pressurizing and dehydrating, can easily be peeled off the mud mud cake from filter cloth, thereby can prevent that filter cloth from stopping up.
Description of drawings
Fig. 1 representes the flowage structure figure of 1 example of sludge dehydration device of the present invention;
Fig. 2 representes other routine flowage structure figure of sludge dehydration device of the present invention;
Fig. 3 representes other routine flowage structure figure of sludge dehydration device of the present invention;
Fig. 4 is the cross-sectional perspective view that constitutes the fiber of chemical conditioner A, B, E, G (embodiment);
Fig. 5 is the cross-sectional perspective view that constitutes the fiber of chemical conditioner C, D (embodiment);
Fig. 6 is the cross-sectional perspective view that constitutes the fiber of chemical conditioner F (embodiment);
Fig. 7 is the cross-sectional perspective view that constitutes the fiber of chemical conditioner H (embodiment);
Fig. 8 is the cross-sectional perspective view that constitutes the fiber of chemical conditioner I (comparative example);
Fig. 9 is the cross-sectional perspective view that constitutes the fiber of chemical conditioner J, K (market sale article);
Figure 10 is the sectional view expression Fibre diameter, that constitute the fiber of chemical conditioner;
Figure 11 is expression apart from the sectional view degree of depth, that constitute the fiber of chemical conditioner on the summit, deep of the recess that forms striped.
Embodiment
Mud of the present invention is formed by many fibril aggregations with chemical conditioner; On the periphery of each fiber, there are 5～20 recesses that extend along the length direction of fiber; Length direction along fiber in this recess is extended with striped, and when mud contacted with chemical conditioner, this mud played the effect that utilizes capillary action to carry the moisture transfer passage of moisture with striped; Therefore can access excellent water-absorbing property, transmissibility.
In the dress material field of undershirt, sportswear etc., the sticky feelings such as adhesion sense that cause of getting wet when perspiring to eliminate are purpose, study to fiber all the time and give high-hydroscopicity.Therefore moisture is to be absorbed from fiber surface, in order to accelerate absorption rate, adds high surface area and a large amount of water adsorption is got final product.The concavo-convex from the teeth outwards face of multilist more area is big more, the recess on surface can moisture penetration till the fibrous inside during keep moisture here.Therefore, at the dress material field of undershirt, sportswear etc., the preferably fiber of Y type, X type or T type cross-sectional shape.But; The result of inventor's research finds; When the fiber of cutting out Y type, X type or T type cross-sectional shape is used in sludge dewatering; Though can see the reduction of moisture content of the cake to a certain extent, for the so difficult dehydration property mud of the mud of handling with oxidation ditch process, the water ratio of dehydrated sludge cake not necessarily is reduced to satisfied degree.Though its reason is not very clear and definite; But supposition is: the peristome of recess broadens owing to have long curved part on its cross section; So little mud particle occlusion of openings capillary channel; Cause to bring into play effect, when mechanical dehydration, can not bear high squeeze pressure and cause curved part to be destroyed as capillary channel.
The recess that the fiber that in chemical conditioner of the present invention, uses has more than 5 and the preferred length direction of fiber in the periphery upper edge below 10 extends below 20.If the recess of periphery is too much, then can dwindle the peristome area on the contrary, can not bring into play function as chemical conditioner, it is undesirable on cost that difficulty is made in industry.In addition, chemical conditioner of the present invention also can be provided with recess on the fiber periphery of above-mentioned Y type, X type or T type cross-sectional shape.But this fiber has long curved part on its cross section, and the squeeze pressure that bears when therefore carrying out mechanical dehydration destroys curved part easily, should be noted that.
The fiber that in chemical conditioner, uses there is no need to have the recess of equal amts, also can mix to have 5 fibers with upper recess.In addition, also can in the scope of not damaging dehydration property, mix fiber with discontented 5 recesses.
Next, the striped that extends along the staple length direction is described.When mud contacted with chemical conditioner of the present invention, the striped of the recess that extends along the length direction of fiber played the effect that utilizes capillary action to carry the moisture transfer passage of moisture.Compare with the chemical conditioner that uses filamentary material in the past, chemical conditioner of the present invention is because have this capillary action, and its water absorbing properties rises significantly.Though its reason is also indeterminate, can think because: along with the contact surface area of mud and chemical conditioner increases, utilize capillary phenomenon from mud absorption moisture and carry this moisture; And the suitable water molecules of the internal structure of chemical conditioner passes through.
From adding to mud, mix or the viewpoint of operability during dehydration, the length that constitutes each fiber of chemical conditioner is 1mm～50mm, preferred 3mm～20mm, and Fibre diameter is about 1 μ m～100 μ m, preferred 5 μ m～50 μ m.Shown in figure 10, be no matter cross-sectional shape symmetry or the asymmetric longest distance that all refers to the connection convex part summit at this " Fibre diameter ".In addition, such tangent line that connects the adjacent projection summit shown in figure 11 (under the situation of Figure 11 is being D1～D3) preferably in the scope of 0.1 μ m～5 μ m to the vertical range on the summit in the deep of recess.
In addition, the proportion of chemical conditioner under dryness is preferably more than 1.4.Under the situation of proportion discontented 1.4, when treatment of high concentration mud or the stirring of mud storagetank when slow, the contact variation between chemical conditioner and the mud, and uniform mixing needs the long period.
The preferred 30 weight % of the water ratio of chemical conditioner of the present invention～80 weight % are more preferably in the scope of 40 weight %～70 weight %.At water ratio is under the situation below the 30 weight %, relatively poor with the wettability of mud, becomes the uneven state of dispersion of chemical conditioner.In addition, under the situation in the polymer coagulant lixator of after being mixed into, stating, also polymer coagulant dissolves and lysate becomes HV fully sometimes, is difficult to homodisperse chemical conditioner in whole lixator.On the other hand, if water ratio surpasses 80 weight %, the free moisture that then is not infiltrated up in the fiber increases, and when utilizing feed appliance etc. to carry out machinery supplier, is difficult to fixed supply.In addition, because the fibre composition ratio of dispersive dewatered sludge reduces in the mud, so unfavorable at economic aspect.
As the method for the moisture of adjusting chemical conditioner, can preferably use following method.When using the fiber made from the dry spinning method, to shearing with predetermined length behind the adjustment water ratio such as fiber utilization atomizer water spray after making, or shear the back water spray.When using the fiber made from the wet type spinning processes, can replacement solvent, utilize squeezings such as roller after the cleaning, or dryly shear with predetermined length after removing moisture, or carry out drying after shearing.
As the fiber that constitutes chemical conditioner of the present invention, especially preferred regenerated cellulose fibre.As regenerated cellulose fibre, can enumerate out with Mierocrystalline cellulose as regeneration regenerated fiber, secondary cellulose acetate fibers such as the artificial raylande of base polymer, copper rayon fiber, semi-synthetic regenerated fibres such as tri acetic acid fiber cellulose fiber etc.On fiber, form protuberance, summit and be the recess that striated extends, perhaps from the point of easy adjustment water ratio, especially preferred artificial raylande.Regenerated cellulose fibre has biological degradability, in soil, decomposes and disappears, and therefore is suitable for the situation that dehydrated sludge cake as fertilizer sources etc. is utilized again.Even have biological degradability, cotton, flax, wool etc. are not have along the striped of staple length direction extension to be the moisture transfer passage, therefore can not to expect the effect as chemical conditioner.
In the method for the invention, chemical conditioner depends on the concentration of each mud to the addition of mud and changes.In general, the SS in the mud (suspended solids substrate concentration) adds 0.1 weight %～20 weight % as 100, preferably adds 1 weight %～10 weight %.When the addition of chemical conditioner is discontented with 0.1 weight %, can not get effect of the present invention.On the other hand, if surpass 20 weight %, then be difficult to uniform mixing chemical conditioner in mud, this external economic aspect is also unfavorable.
Mix the processed of the mud of chemical conditioner of the present invention and can use common pressure dewatering machine, vacuum hydroextractor, belt squeezing dewatering machine, centrifuge, spiral pressing dehydrator.Particularly in recent years, in the sewage-farm of medium-scale, spiral pressing dehydrator is just obtaining adopting as the water extracter that is used to handle difficult dehydration property mud.When utilizing spiral pressing dehydrator to carry out sludge dewatering treatment, preferably, in mud, adding length is the chemical conditioner of 3mm～20mm, and the scope of 1 weight %～10 weight % is added under preferably the SS in the mud being converted as 100 and with over dry.On the other hand; Even using belt squeezing dewatering machine, centrifuge to carry out under the situation of processed; Also can preferably use the chemical conditioner of length as 3mm～20mm, the scope of 1 weight %～10 weight % is added under preferably the SS in the mud being converted as 100 and with over dry.
Preferably, chemical conditioner of the present invention adds in the mud storagetank and mixes with mud.Under the situation that does not have the mud storagetank, both can add chemical conditioner at the mud that is arranged in any pipeline till the mud of extracting out from thickener arrives water extracter, also can in the mud before the mud enrichment process, add chemical conditioner.
Under the situation in the mud in chemical conditioner being added to mud thickener, mud storagetank, can disposablely be added into above-mentioned addition scope.In addition, under the situation in the mud in adding pipeline to, because mud flows into continuously or off and on, extracts out, so also can suitably append chemical conditioner according to influx, the extraction amount of mud.In addition, under the situation of adding before the water extracter, get final product to add with respect to the mode that is fed to mud discharge in the water extracter and becomes the scope of above-mentioned addition.Can before and after the interpolation that is added on condensing agent of chemical conditioner.But,, more preferably before adding condensing agent, add from the point of uniform mixing chemical conditioner mud.After adding condensing agent, in mud, add under the situation of chemical conditioner, also can add in mud, the mud in the granulation thickener of the downstream of coagulating bath setting in the coagulating bath, any mud of filtration that condenses from the mud behind the mud of coagulating bath.In recent years, develop spiral pressing dehydrator with filtering and concentrating portion.When using the water extracter of this style, the mud that after filtering and concentrating, condenses simultaneously is fed to the position of water extracter main body and adds chemical conditioner, can uniform mixing mud and chemical conditioner.Chemical conditioner both can directly add in the mud with fibrous (being solid), also can add and add in the mud after water forms pulpous state.Situation can be used the feeding mechanism that is suitable for shape and quantitatively add arbitrarily.
In addition, also can add chemical conditioner and polymer coagulant simultaneously.Specifically, in the dissolving operation of polymer coagulant or after the dissolving, the chemical conditioner and the mixing that in the polymer coagulant lixator, drop into predetermined amount get final product.Mud in coagulating bath, form the clod that condenses during, in the polymer coagulant lixator in the homodisperse chemical conditioner of polymer coagulant gets into the clod that condenses.
Fig. 1～Fig. 3 illustrates the flowage structure figure of the device that uses in the dewatering of mud of the present invention.
Fig. 1 is to use 1 example of belt squeezing dewatering machine 4 as the mechanical dehydration machine.In mud thickener 1, seen off to mud storagetank 2 from the bottom of mud thickener 1, store the scheduled time by spissated mud.Thereafter, mud is seen off to coagulating bath 3 from mud storagetank 2.Polymer coagulant adds to the coagulating bath 3 from polymer coagulant lixator 6, mud is condensed and forms the clod that condenses.Then, the clod that condenses (mud) is seen off to water extracter 4, carries out processed and forms dehydrated sludge cake.Pipeline from chemical conditioner dispenser device 5 be connected to mud thickener 1, mud storagetank 2, coagulating bath 3 and the polymer coagulant lixator 6 more than 1, can add chemical conditioner.About chemical conditioner being added to the position in the mud,, select a plurality of grooves and pipeline to get final product respectively or simultaneously according to treatment situation.If add chemical conditioner,, add chemical conditioner to mud when therefore preferably before adding polymer coagulant, perhaps adding polymer coagulant then owing to contact reductions between each mud and the chemical conditioner to the clod that condenses (mud).Therefore, especially preferred is that chemical conditioner is added in mud thickener 1 or the polymer coagulant lysate 6.
Fig. 2 be to use spiral pressing dehydrator 7 as the mechanical dehydration machine, use dual grooved coagulating bath 3-1,3-2 example as coagulating bath.The interpolation of chemical conditioner is identical with embodiment shown in Figure 1.Under the situation of this embodiment, especially preferred is that chemical conditioner adds polymer coagulant after adding the 1st coagulating bath 3-1 in the 2nd coagulating bath, mud and chemical conditioner are entered in the clod that condenses together.
Fig. 3 be to use spiral pressing dehydrator 7 that the latter stage at coagulating bath 3 is provided with filtering and concentrating portion 8 as the mechanical dehydration machine, use dual grooved coagulating bath 3-1,3-2 example as coagulating bath.Utilize filtering and concentrating portion 8, the moisture that agglomerative mud in coagulating bath 3 is contained carries out rough dehydration, and concentrated formation comprises the clod that condenses of chemical conditioner and mud.Filtering and concentrating portion 8 also can be another device that is configured between coagulating bath and the water extracter, the filter screen that for example have the equipment for separating liquid from solid of one group of oval plate of rotation, tilts from coagulating bath outlet downwards or have the granulation thickener that is arranged on the inner band finedraw cartridge filter of coagulating bath.In embodiment shown in Figure 3, the interpolation of chemical conditioner is identical with embodiment shown in Figure 2 to get final product.
As polymer coagulant, can use cationic high-molecular condensing agent, Amphiphatic high polymer agglutinant, anionic polymer coagulant and non-ionic type polymer coagulant.The cationic high-molecular condensing agent is with the polymer coagulant of cationic monomer unit as neccessary composition, has the multipolymer of multipolymer, cationic monomer and the non-ionic monomer of cationic monomer.As cationic monomer, can enumerate out vinylformic acid dimethylamino ethyl ester, dimethylaminoethyl methacrylate, vinylformic acid dimethylamino ethyl ester, dimethylaminoethyl methacrylate or the neutralized salt that they generated of neutralizing, quaternary salt etc.In addition, also can use intramolecularly to contain the unitary cationic high-molecular condensing agent of amidine.As non-ionic monomer, can enumerate out acrylic amide, USAF RH-1, methacrylonitrile, vinyl acetate between to for plastic etc.
The Amphiphatic high polymer condensing agent is cationic monomer unit, anionic property monomeric unit and the unitary interpolymer of non-ionic monomer.As the anionic property monomer, can enumerate out the metal-salt or the ammonium salt of vinylformic acid, methyl-prop diluted acid, methylene-succinic acid, toxilic acid, fumaric acid, 2-acrylic amide-2-methyl propane sulfonic acid, 2-USAF RH-1-2-methyl propane sulfonic acid and their basic metal, earth alkali metal etc.
As the anionic polymer coagulant, can enumerate out the monomeric interpolymers of nonionic shape such as the monomeric interpolymer of partial hydrolysate, anionic property, anionic property monomer and acrylic amide of SEPIGEL 305.Can enumerate out above-mentioned monomer as the anionic property monomer, these anionic property monomers can use separately, also can make up two or more uses.As non-ionic monomer, can enumerate out above-mentioned monomer, these non-ionic monomers can use separately, also can make up two or more uses.Preferably have as multipolymer: acrylic amide acrylate multipolymer, acrylic amide 2-acrylic amide-2-methyl propane sulfonic acid multipolymer.
The non-ionic type polymer coagulant is meant the polymkeric substance or the multipolymer of above-mentioned non-ionic monomer, preferably SEPIGEL 305.
No matter the shape of polymer coagulant is Powdered or emulsion form all can use.
In addition,, that is, in mud, add the cationic high-molecular condensing agent, add the anionic polymer coagulant then as the also applicable double reagent method of the addition means of polymer coagulant.
And then, can also be suitable for and add the method for adding polymer coagulant behind inorganic coagulant or the organic high-molecular coagulant.As inorganic coagulant, can use the Tai-Ace S 150, poly aluminium chloride (PAC), bodied ferric sulfate (gathering iron), iron(ic)chloride or their mixture that are generally used for the sludge treatment technology.As organic high-molecular coagulant, can use condensation is polyamines, Dyhard RU 100 formaldehyde condensation products, polymine, polyvinyl imidazole quinoline (polyvinyl imidazoline), polyvinyl pyridine, diallylamine salt sulfurous gas multipolymer, poly dimethyl allyl ammonium salt, poly dimethyl allyl ammonium salt sulfurous gas multipolymer, poly dimethyl allyl ammonium salt acrylamide copolymer, poly dimethyl allyl ammonium salt diallylamine hydrochloride verivate multipolymer, allyl amine salt polymkeric substance etc.As condensation is the object lesson of polyamines, can enumerate out the condenses etc. of condenses, ammonia and Epicholorohydrin of condenses, Alkylenediamine and Epicholorohydrin of condenses, aniline and the formaldehyde of alkylidene group dichloride and alkylene polyamine.As with the Alkylenediamine of Epicholorohydrin condensation, can enumerate out n n dimetylaniline, diethylamine, methyl propylamine, methylbutylamine, dibutylamine etc.
In mud dewatering method of the present invention, also can in advance the skimmer, the reodorant that in the sludge treatment technology, use usually be immersed in the chemical conditioner.The crushed material etc. that can also in chemical conditioner, mix in addition, other natural fibers.
In mud dewatering method of the present invention, become the mud of dehydration object so long as the mud that produces in the active sludge treatment operation from general draining processing, the dirty processing of excrement, effluent sewerage are handled is just irrelevant with kind.Excess sludge that particularly produces from oxidation ditch process or effluent sewerage digested sludge, the mud that produces from the dirty treatment facility of excrement etc.; Because coagulability is bad; In the processed of the mud of the water ratio that is difficult to reduce dewatered sludge, can give play to effect of the present invention.
Embodiment
Below, specify the present invention with embodiment.
(manufacturing of chemical conditioner)
The chemical conditioner that uses in an embodiment is through following method manufacturing.
< chemical conditioner A >
In the spinning bath that contains sulfuric acid, sodium sulfate, zinc sulfate, through having the spinning nozzle of rounded section, will comprise the cellulosic viscose fiber solution of 8.1wt% (viscose, spinning solution) and extrude continuously, spinning is a cellulosic fibre.Then, the cellulosic fibre importing is comprised the regeneration that stretches in the vitriolic stretching-regeneration bath, thereby obtain the regenerated cellulose strand.Utilize roller clamping regenerated cellulose strand to remove moisture, water ratio is adjusted to 58%, cut off with length 10mm then.
< chemical conditioner B >
Except that the regenerated cellulose strand is cut off with length 1mm, carry out the processing same with chemical conditioner A.
< chemical conditioner C >
Except that carrying out the spinning, carry out the processing same, thereby obtain the regenerated cellulose strand with chemical conditioner A through spinning nozzle with Y type cross section.Temperature with 105 ℃ in moisture eliminator is carried out 2 hours dryings to the regenerated cellulose strand, shears water spray and water ratio is adjusted to 48% afterwards with length 5mm.
< chemical conditioner D >
Except that the regenerated cellulose strand is cut off with length 15mm, carry out the processing same with chemical conditioner C.
< chemical conditioner E >
Except that the regenerated cellulose strand is cut off with length 38mm, carry out the processing same with chemical conditioner A.
< chemical conditioner F >
Use is dissolved in the spinning solution of the mixed solvent of methylene chloride with cellulosetri-acetate sheet (Cellulose triacetate flake), obtains the regenerated cellulose strand.With the cut-out of the regenerated cellulose that obtains with length 5mm.
< chemical conditioner G >
Replacement is pressed with roll-in, and utilizes drying machine, to cut off with length 5mm after 2 hours with 105 ℃ of dryings the regenerated cellulose strand, in addition carries out the processing same with chemical conditioner A.
< chemical conditioner H >
To carry out the regenerated cellulose strand that continuous spinning obtains through spinning nozzle with oval cross-section; Utilize moisture eliminator with 105 ℃ temperature drying 2 hours; Cut off with length 10mm afterwards, water spray and water ratio is adjusted to 54% carries out the processing same with chemical conditioner A in addition.
< chemical conditioner I >
In the spinning solution of chemical conditioner F, add polyoxyethylene glycol,, gained regenerated cellulose strand is cut off with length 5mm, in addition carry out the processing same with chemical conditioner A through having the continuous extruding spinning of spinning nozzle in Y type cross section.
< chemical conditioner J >
Commercially available cuprammonium artificial filament (cupra rayon filament) is cut off with length 10mm.
< chemical conditioner K >
In containing the cellulosic viscose solution of 8.1wt%, add polyoxyethylene glycol and the next synthetic spinning solution of yellow soda ash except that using, carry out the processing same, obtain the regenerated cellulose strand with chemical conditioner A.Utilize drying machine after 2 hours, to cut off the regenerated cellulose strand, water spray and water ratio is adjusted to 43% with length 10mm with 105 ℃ temperature drying.
The water ratio of chemical conditioner is calculated through following method: measure weight (a) g of the chemical conditioner that modulates, weight (b) g of the chemical conditioner measurement is dewatered this chemical conditioner with 105 ℃ of dryings 4 hours after utilizes formula (a-b)/a * 100 (%) to calculate.
Having or not of the recess quantity of fiber and the striped of extension is to utilize microscope to see to wipe and the range estimation counting.
Table 1 illustrates the character of the chemical conditioner that uses in the present embodiment.
(table 1)
The stereographic map that shows the fibre section of the chemical conditioner A～K of place in Fig. 4～9.
Fig. 4 is the stereographic map of chemical conditioner A, B, E, G.On the fibre section, there are a plurality of recesses, in recess, have the striped that extends along the staple length direction.
Fig. 5 is the stereographic map of chemical conditioner C, D.On the fibre section, there are a plurality of recesses, in recess, have the striped that extends along the staple length direction.
Fig. 6 is the stereographic map of chemical conditioner F.On the fibre section, there are a plurality of recesses, in recess, have the striped that extends along the staple length direction.
Fig. 7 is the stereographic map of chemical conditioner H.On the fibre section, there are a plurality of recesses, in recess, have the striped that extends along the staple length direction.
Fig. 8 is the stereographic map of chemical conditioner I.On the fibre section, there are a plurality of recesses, in recess, have the striped that extends along the staple length direction.
Fig. 9 is the stereographic map of chemical conditioner J, K.On the fibre section, there are a plurality of recesses, in recess, have the striped that extends along the staple length direction.
(embodiment 1) (situation that relatively has or not chemical conditioner of the present invention)
Have character shown in the table 2, handle the excess sludge mud that produces from the oxidation ditch process effluent sewerage, with SS as 100 and oven dry weight becomes the mode of 3wt% and adds chemical conditioner A, the adjustment sludge slurry.Then, use polymer coagulant (the methyl chloride season amides/acrylamide copolymer of vinylformic acid dimethylamino ethyl ester, molecular weight 4,000,000 utilizes tap water to be adjusted into 0.2%) to carry out dehydration test.Mud 200ml is put into the beaker of 300ml, add the polymer coagulant of predetermined amount after, carry out No. 10 times between the beaker transfer and mud is condensed.After measuring the size of agglomerative mud, agglomerative mud carried place on the 60 purpose nylon cloths, utilize gravity dehydration, measure the filtration water yield after 30 seconds.Mud after the gravity filtration is clipped between 2 filter cloths, uses the piston-type water extracter with 2kg/cm
3Pressure squeezing one minute.The dehydrated sludge cake that obtains is carried out the evaluation of separability and the measurement of water ratio.The evaluation of separability is carried out as follows: the mud cake amount that range estimation comes off from filter cloth when opening 2 filter cloths after the dehydration; Situation about peeling off basically fully is judged as ◎; Situation about peeling off about half is judged as △; Peel off situation much more half the but that do not peel off fully and be judged as zero, attached on the whole filter cloth and situation about not peeling off is judged as X.Result shown in the table 3.
(comparative example 1,2)
Under the situation of not adding chemical conditioner, carry out dehydration test.Compare with embodiment 1, moisture content of the cake uprises 2～3 points (percentage point).The result is shown in the table 3 in the lump.
(table 2)
| pH | Electric conductivity (mS/m) | TS(g/L) | SS(g/L) | VSS(％) | Fibre composition (%) |
| 6.3 | 68 | 11.6 | 11.4 | 85.4 | 4.7 |
(table 3)
(embodiment 2～9) (other embodiments of the present invention)
Replace chemical conditioner A and use the chemical conditioner shown in the table 4, change the interpolation rate of chemical conditioner, in addition carry out the test identical with embodiment 1.Result shown in the table 4.
(comparative example 3～6) (relatively chemical conditioner)
Add chemical conditioner H, I, K carry out the dehydration test identical with embodiment 1.Dispersion in mud is bad, and the water ratio of mud cake uprises (comparing embodiment 2 and comparative example 5,6, perhaps comparing embodiment 5,6 and comparative example 4) more than 2.The result is shown in the table 4 in the lump.
(table 4)
(embodiment 10) (situation that relatively has or not chemical conditioner of the present invention)
Handle in the digested sludge that produces at effluent sewerage with character shown in the table 5, with SS as 100 and oven dry weight becomes the mode of 2wt% and adds chemical conditioner C, the adjustment sludge slurry.Then, use polymer coagulant (the methyl chloride season amides/acrylamide copolymer of vinylformic acid dimethylamino ethyl ester, molecular weight 3,000,000 utilizes tap water to be adjusted into 0.2%) to carry out the dehydration test identical with embodiment 1.Result shown in the table 6.
(comparative example 7,8)
Under the situation of not adding chemical conditioner C, carry out dehydration test.Compare with embodiment 10, water ratio uprises more than 3.The result is shown in the table 6 in the lump.
(table 5)
| pH | Electric conductivity (mS/m) | TS(g/L) | SS(g/L) | VSS(％) | Fibre composition (%) |
| 7.4 | 732 | 15.2 | 14.3 | 73.8 | 4.1 |
(table 6)
(embodiment 11～15) (other embodiments of the present invention)
Use the chemical conditioner shown in the table 1 except that replacing chemical conditioner C, carry out the test identical with embodiment 10.Result shown in the table 7.
(comparative example 9～14) (relatively chemical conditioner)
Add chemical conditioner I and J, carry out the dehydration test identical with embodiment 10.Dispersion in mud is bad, and the water ratio of mud cake uprises more than 2.The result is shown in the table 7 in the lump.
(table 7)
(embodiment 16～21) (interpolation in the polymer coagulant lysate and situation that relatively has or not chemical conditioner of the present invention; Use the real machine test of spiral pressing dehydrator)
<beaker test >
0.2% aqueous solution 1L with the polymer coagulant that uses among the embodiment 1; Utilize alcohol coagulation test device (jar tester) to stir on one side with 200rpm; Add chemical conditioner A, D, E, continuously stirring 1 hour with oven dry weight 3g (with respect to the amount of 1.5 times of dissolved polymer coagulants) respectively on one side.Observe the dispersion state and the flowability of chemical conditioner in the liquid after 1 hour.Result shown in the table 8.
< real machine test >
Then, the chemical conditioner of 0.2% aqueous solution (tap water) of the polymer coagulant that in the macromolecule dissolution groove, uses among the input embodiment 1 and 1.5 times of amounts of polymer coagulant stirs, mixes, and modulation contains chemical conditioner polymer coagulant liquid.
Then, will have the excess sludge that produces from the dirty treatment facility of excrement of character shown in the table 9 and the mixing sludge mud of coagulating sedimentation mud, and be fed to spiral pressing dehydrator shown in Figure 2 (filter screen diameter of phi 300mm) and dewater through coagulating bath.Utilize spiral pump (mohno-pump) in coagulating bath, to add and contain chemical conditioner polymer coagulant liquid after the modulation, sludge slurry is condensed.In spiral pressing dehydrator, dewater with the condition of revolution speed of screw 0.4rpm, observe the state that the mud that condenses spills from metal sieve plate, measure the water ratio of dehydrated sludge cake.Result shown in the table 10.
(comparative example 14,15)
Use separately polymer coagulant to dewater, do not use chemical conditioner, in addition carry out the test identical with embodiment 16.Result shown in the table 10.
(table 8)
| Test No | The chemical conditioner kind | The dispersion state of chemical conditioner | The flowability of solution |
| 1 | A | Homodisperse | Well |
| 2 | D | Homodisperse | Well |
| 3 | E | Homodisperse | Well |
(table 9)
| pH | Electric conductivity (mS/m) | TS(g/L) | SS(g/L) | VSS(％) | Fibre composition (%) |
| 6.9 | 297 | 15.2 | 13.2 | 71.5 | 4.1 |
(table 10)
(comparative example 16～17)
Except that using chemical conditioner I, J, mix polymer coagulant and chemical conditioner with embodiment 16～21 identically.Result shown in the table 11.Chemical conditioner I, J do not have homodisperse in the polymer coagulant aqueous solution, therefore do not implement the test under the ensuing real machine device.
As shown in table 11; Because do not have homodisperse perhaps to have under the liquid fluidity condition of poor at chemical conditioner; Contain can not the spray volume from killer injecting pump be maintained under the chemical conditioner polymer coagulant liquid constant; So can know to cause pump, other injection line cloggings, be not suitable for this use.
(table 11)
| Test No | The chemical conditioner kind | Dispersion state and mobile |
| Comparative example 16 | I | Homodisperse, but the viscosity high workability of liquid is bad |
| Comparative example 17 | J | Can see and not have the dispersive block on the part |
Claims (14)
1. a mud is used chemical conditioner, it is characterized in that,
Above-mentioned mud is formed by many fibril aggregations with chemical conditioner,
On the periphery of each fiber, there are 5～20 recesses that extend along the length direction of fiber,
Length direction along fiber in above-mentioned recess is extended with striped, and when mud contacted with chemical conditioner with above-mentioned mud, this striped played the effect that utilizes capillary action to carry the moisture transfer passage of moisture.
2. want 1 described mud to use chemical conditioner according to right, it is characterized in that,
Above-mentioned mud is formed by the regenerated cellulose fibre gathering with chemical conditioner, and water ratio is 30 quality %～80 quality %.
3. want 1 described mud to use chemical conditioner according to right, it is characterized in that,
Above-mentioned mud uses the length of chemical conditioner to be 1mm～50mm, and it is 1 μ m～100 μ m that above-mentioned mud uses the Fibre diameter of chemical conditioner.
4. a mud is used chemical conditioner, it is characterized in that,
Above-mentioned mud is formed by many regenerated cellulose fibres gatherings with chemical conditioner,
On the periphery of each fiber, there are 5～20 recesses that form along the length direction of fiber,
Length direction along fiber in above-mentioned recess is extended with striped, and when mud contacted with chemical conditioner with above-mentioned mud, this striped played the effect that utilizes capillary action to carry the moisture transfer passage of moisture,
It is 30 quality %～80 quality % that above-mentioned mud uses the water ratio of chemical conditioner.
5. want 4 described mud to use chemical conditioner according to right, it is characterized in that,
Above-mentioned mud uses the length of chemical conditioner to be 1mm～50mm, and it is 1 μ m～100 μ m that above-mentioned mud uses the Fibre diameter of chemical conditioner.
6. the dewatering of a mud is characterized in that,
With mud with chemical conditioner add in the organic sludge mix after, add polymer coagulant this organic sludge condensed, carry out mechanical dehydration afterwards,
Above-mentioned mud is formed by many fibril aggregations with chemical conditioner; On the periphery of each fiber, there are 5～20 recesses that form along the length direction of fiber; Length direction along fiber in above-mentioned recess is extended with striped; When mud contacted with chemical conditioner with above-mentioned mud, this striped played the effect that utilizes capillary action to carry the moisture transfer passage of moisture.
7. the dewatering of a mud is characterized in that,
With after containing chemical conditioner polymer coagulant liquid and adding in the organic sludge, this organic sludge is condensed, carry out mechanical dehydration afterwards,
The above-mentioned chemical conditioner polymer coagulant liquid mixing sludge that contains forms with chemical conditioner and polymer coagulant,
Above-mentioned mud is formed by many fibril aggregations with chemical conditioner; On the periphery of each fiber, there are 5～20 recesses that form along the length direction of fiber; Length direction along fiber in above-mentioned recess is extended with striped; When mud contacted with chemical conditioner with above-mentioned mud, this striped played the effect that utilizes capillary action to carry the moisture transfer passage of moisture.
8. the dewatering of a mud is characterized in that,
Mud is added in the organic sludge with chemical conditioner and polymer coagulant simultaneously, this organic sludge is condensed, carry out mechanical dehydration afterwards,
Above-mentioned mud is formed by many fibril aggregations with chemical conditioner; On the periphery of each fiber, there are 5～20 recesses that form along the length direction of fiber; Length direction along fiber in above-mentioned recess is extended with striped; When mud contacted with chemical conditioner with above-mentioned mud, this striped played the effect that utilizes capillary action to carry the moisture transfer passage of moisture.
9. according to the dewatering of each described mud in the claim 6 to 8, it is characterized in that,
Above-mentioned mechanical dehydration utilizes spiral pressing dehydrator to carry out.
10. a sludge dehydration device is characterized in that,
This sludge dehydration device is to be used for mud is added to organic sludge and this organic sludge is carried out the device of mechanical dehydration with chemical conditioner,
Above-mentioned mud is formed by many fibril aggregations with chemical conditioner; On the periphery of each fiber, there are 5～20 recesses that form along the length direction of fiber; Length direction along fiber in above-mentioned recess is extended with striped; When mud contacted with chemical conditioner with above-mentioned mud, this striped played the effect that utilizes capillary action to carry the moisture transfer passage of moisture
Above-mentioned sludge dehydration device comprises: the mud storagetank; Coagulating bath; The mechanical dehydration machine; The chemical conditioner dispenser device, it is used for above-mentioned mud is fed to organic sludge with chemical conditioner; And the polymer coagulant dissolver, it is used for dissolving the polymer coagulant that is fed to above-mentioned coagulating bath;
Above-mentioned polymer coagulant dissolver via pipe connection in above-mentioned coagulating bath.
11. sludge dehydration device according to claim 10 is characterized in that,
Be provided with the mud thickener in the last stage of above-mentioned mud storagetank,
Above-mentioned chemical conditioner dispenser device via pipe connection in above-mentioned mud thickener.
12. sludge dehydration device according to claim 10 is characterized in that,
Between above-mentioned coagulating bath and above-mentioned mechanical dehydration machine, be provided with filtering and concentrating portion.
13. sludge dehydration device according to claim 10 is characterized in that,
Above-mentioned mechanical dehydration device is a spiral pressing dehydrator.
14. sludge dehydration device according to claim 10 is characterized in that,
Above-mentioned chemical conditioner dispenser device is connected at least one in above-mentioned mud storagetank, above-mentioned coagulating bath, above-mentioned mechanical dehydration machine and the above-mentioned polymer coagulant dissolver.
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| JP2010193079 | 2010-08-31 | ||
| JP2010-193079 | 2010-08-31 | ||
| JP2011-173205 | 2011-08-08 | ||
| JP2011173205A JP5658107B2 (en) | 2010-08-31 | 2011-08-08 | Sludge dewatering aid and sludge dewatering method and apparatus |
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| CN102381827B CN102381827B (en) | 2015-02-25 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2018192592A1 (en) * | 2017-04-21 | 2018-10-25 | Corporacion Universidad De La Costa Cuc | Chemical process for obtaining a compost product from microbiologically innocuous solid waste, and chemical composition for mixing in said process |
| CN110104923A (en) * | 2019-04-01 | 2019-08-09 | 湖北工业大学 | A kind of penetrating passage construction method of fast dewatering and application |
| CN113666470A (en) * | 2020-05-14 | 2021-11-19 | 迪睿合株式会社 | Wastewater treatment agent and method for producing wastewater treatment agent |
| CN113874093A (en) * | 2019-05-31 | 2021-12-31 | 迪睿合株式会社 | Water treatment agent, method for producing same, and water treatment method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6109225B2 (en) | 2015-03-30 | 2017-04-05 | デクセリアルズ株式会社 | Water purification agent and water purification method |
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| US4559143A (en) * | 1979-07-10 | 1985-12-17 | Nichikeri Chemical Industry Co. Ltd. | Sludge treating method |
| CN2730867Y (en) * | 2004-08-25 | 2005-10-05 | 清华同方股份有限公司 | Moveable mud treatment device |
| CN200967865Y (en) * | 2006-05-11 | 2007-10-31 | 山东亚光纺织集团有限公司 | Easy-wet quick-drying towel |
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- 2011-08-29 KR KR1020110086473A patent/KR20120021241A/en not_active Application Discontinuation
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4559143A (en) * | 1979-07-10 | 1985-12-17 | Nichikeri Chemical Industry Co. Ltd. | Sludge treating method |
| CN2730867Y (en) * | 2004-08-25 | 2005-10-05 | 清华同方股份有限公司 | Moveable mud treatment device |
| CN200967865Y (en) * | 2006-05-11 | 2007-10-31 | 山东亚光纺织集团有限公司 | Easy-wet quick-drying towel |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018192592A1 (en) * | 2017-04-21 | 2018-10-25 | Corporacion Universidad De La Costa Cuc | Chemical process for obtaining a compost product from microbiologically innocuous solid waste, and chemical composition for mixing in said process |
| CN110104923A (en) * | 2019-04-01 | 2019-08-09 | 湖北工业大学 | A kind of penetrating passage construction method of fast dewatering and application |
| CN113874093A (en) * | 2019-05-31 | 2021-12-31 | 迪睿合株式会社 | Water treatment agent, method for producing same, and water treatment method |
| CN113666470A (en) * | 2020-05-14 | 2021-11-19 | 迪睿合株式会社 | Wastewater treatment agent and method for producing wastewater treatment agent |
| CN113666470B (en) * | 2020-05-14 | 2024-04-23 | 迪睿合株式会社 | Wastewater treatment agent and method for producing wastewater treatment agent |
Also Published As
| Publication number | Publication date |
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| KR20120021241A (en) | 2012-03-08 |
| CN102381827B (en) | 2015-02-25 |
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