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WO2008130208A1 - Agent pour solidifier des boues d'égout ou d'eaux usées et matériau de construction fabriqué à partir de ces boues - Google Patents

Agent pour solidifier des boues d'égout ou d'eaux usées et matériau de construction fabriqué à partir de ces boues Download PDF

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Publication number
WO2008130208A1
WO2008130208A1 PCT/KR2008/002340 KR2008002340W WO2008130208A1 WO 2008130208 A1 WO2008130208 A1 WO 2008130208A1 KR 2008002340 W KR2008002340 W KR 2008002340W WO 2008130208 A1 WO2008130208 A1 WO 2008130208A1
Authority
WO
WIPO (PCT)
Prior art keywords
solidifying agent
sludge
sewage
wastewater sludge
solidifying
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2008/002340
Other languages
English (en)
Inventor
Jai-Sam Lim
Jong-Hak Kim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ENVIVE Co Ltd
Original Assignee
ENVIVE Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ENVIVE Co Ltd filed Critical ENVIVE Co Ltd
Publication of WO2008130208A1 publication Critical patent/WO2008130208A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/008—Sludge treatment by fixation or solidification
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B1/00—Dumping solid waste
    • B09B1/004—Covering of dumping sites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09C—RECLAMATION OF CONTAMINATED SOIL
    • B09C1/00—Reclamation of contaminated soil
    • B09C1/08—Reclamation of contaminated soil chemically
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/021—Ash cements, e.g. fly ash cements ; Cements based on incineration residues, e.g. alkali-activated slags from waste incineration ; Kiln dust cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/08—Slag cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/10—Lime cements or magnesium oxide cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00767—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes
    • 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
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/30—Landfill technologies aiming to mitigate methane emissions
    • 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
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

  • the present invention relates to an agent for solidifying sewage or wastewater sludge and a construction material manufactured thereby, and more particularly, to a solidifying agent, which simultaneously causes not only the solidification of sewage or wastewater sludge but also foaming expansion, so that water is instantaneously absorbed and sludge is dispersed and solidified, and to a construction material, which is manufactured by solidifying the sewage or wastewater sludge using the solidifying agent and includes waste landfill cover material, road sub-base layer material, construction aggregate, retaining wall backfill material, paving blocks, boundary stone, bricks, or exterior material.
  • a solidifying agent which simultaneously causes not only the solidification of sewage or wastewater sludge but also foaming expansion, so that water is instantaneously absorbed and sludge is dispersed and solidified
  • a construction material which is manufactured by solidifying the sewage or wastewater sludge using the solidifying agent and includes waste landfill cover material, road sub-base layer material, construction aggregate, retaining wall backfill material, paving
  • sewage or wastewater sludge (alias dehydrated cake) is solid matter having high water content obtained by separating floating material in water, forming at the time of sewage or wastewater treatment, from liquid and concentrating it.
  • sewage or wastewater sludge is solid matter having high water content obtained by separating floating material in water, forming at the time of sewage or wastewater treatment, from liquid and concentrating it.
  • Ktrean Patent No. 551250 registered by the present inventors, discloses an agent for solidifying sewage or wastewater sludge and a construction material manufactured thereby.
  • the above solidifying agent is advantageous because pollutants are solidified using an inorganic binder and then collected with paraffin, thereby ultimately realizing stable solidified matter.
  • the degree of dispersion of the solidified matter is low and the solidified matter has an inclination to agglomerate into a lump during the solidification, limitations are imposed on obtaining solidified matter which is dried up to the inner portion thereof.
  • the present invention provides an agent for solidifying sewage or wastewater sludge, which eliminates solidification inhibitors around a target to be solidified and is coupled with a solidification accelerator which is economical and usable in practice, thus facilitating the solidification of sewage or wastewater sludge.
  • the present invention provides a construction material, which is manufactured by solidifying sewage or wastewater sludge using the above solidifying agent and includes waste landfill cover material, road sub-base layer material, construction aggregate, retaining wall backfill material, paving blocks, boundary stone, bricks, or exterior material.
  • the present invention enables the reuse of sewage or wastewater sludge, which is difficult to dispose of, thus decreasing environmental pollution.
  • a solidifying agent may comprise 70-90 wt% of at least one inorganic material selected from the group consisting of cement, quicklime, gypsum, slag, and fly ash; 0.1-10 wt% of at least one metallic material selected from the group consisting of magnesium-based powder and aluminum-based powder; 0.2-10.0 wt% of at least one absorbent material selected from the group consisting of super absorbent polymers and silica gel; and 2.0-10.0 wt% of at least one carrier selected from the group consisting of diatomite, talc, zeolite, and acid clay.
  • the solidifying agent of the present invention may further comprise 0.1-10.0 wt% of at least one organic material selected from the group consisting of paraffin, stearic acid, and wax.
  • the solidifying agent of the present invention may further comprise 0.1-10.0 wt% of at least one reaction accelerator selected from the group consisting of calcium chloride, sulfonic acid-based water-reducing agents, and lignin-based water-reducing agents.
  • a construction material manufactured using the solidifying agent of the present invention may be manufactured by mixing the aforementioned solidifying agent with dehydrated sewage or wastewater sludge or concentrated sewage or wastewater sludge to thus prepare a mixture which is then naturally cured or dried, wherein the solidifying agent may be mixed in an amount of 3-15 wt% based on the total weight of the dehydrated sewage or wastewater sludge or concentrated sewage or wastewater sludge.
  • a construction material manufactured using the solidifying agent of the present invention may be manufactured by mixing 50-67 wt% of the aforementioned construction material with 33-50 wt% of the solidifying agent to prepare a mixture, which is then mixed in an amount of 3-25 wt% based on the total weight of the dehydrated sewage or wastewater sludge or concentrated sewage or wastewater sludge.
  • the solidifying agent simultaneously causes not only typical solidification but also foaming expansion when solidifying sewage or wastewater sludge, thus instantaneously absorbing water and dispersing sludge, thereby reducing the drying time and stabilizing and solidifying the sludge.
  • the sewage or wastewater sludge which is solidified using the solidifying agent of the present invention, is forcibly or naturally dried, it can be reused such that it aids the dispersion of sludge while playing a role as a carrier upon the solidification treatment of sludge, thereby decreasing the amount of solidifying agent to be added and the amount of sludge to be disposed of.
  • the sewage or wastewater sludge which is solidified using the solidifying agent of the present invention, can be applied in various construction material forms, specifically, can be used as landfill cover material, road sub-base layer material, construction aggregate or retaining wall backfill material, and further, can be molded into paving blocks, boundary stone, bricks or exterior material, thus decreasing environmental pollution.
  • FIG. 1 shows the state of sludge, which is subjected to dehydration in a sewage treatment plant
  • FIG. 2 shows the sludge, which is solidified using the solidifying agent according to the present invention
  • FIG. 3 shows the water content depending on the mixing ratio of the solidifying agent according to the present invention
  • FIG. 4 shows the unoonfined compressive strength depending on the mixing ratio of the solidifying agent according to the present invention
  • FIG. 5 shows the coefficient of water permeability depending on the mixing ratio of the solidifying agent according to the present invention
  • FIG. 6 shows a mixer (twin type) for use in mixing the solidifying agent according to the present invention with sewage or wastewater sludge, according to an embodiment of the present invention.
  • FIG. 7 shows a mixer (ribbon type) for use in mixing the solidifying agent according to the present invention with sewage or wastewater sludge, according to another embodiment of the present invention. Best Mode for Carrying Out the Invention
  • a solidifying agent is composed of an inorganic material and an accelerating admixture, the accelerating admixture including a metallic material, an absorbent material, a carrier, an organic material, and a reaction accelerator.
  • the solidifying agent according to the present invention comprises 70-90 wt% of at least one inorganic material selected from the group consisting of cement, quicklime, gypsum, slag, and fly ash; 0.1-10 wt% of at least one metallic material selected from the group consisting of magnesium-based powder and aluminum-based powder; 0.2-10.0 wt% of at least one absorbent material selected from the group consisting of super absorbent polymers and silica gel; 2.0-10.0 wt% of at least one carrier selected from the group consisting of diatomite, talc, zeolite, and acid clay; 0.1-10 wt% of at least one organic material selected from the group consisting of paraffin, stearic acid, and wax; and 0.1-10
  • the inorganic material is at least one selected from the group consisting of cement, quicklime, gypsum, slag, and fly ash.
  • the inorganic material for the solidifying agent according to the present invention is not limited to the above examples.
  • the metallic material is at least one selected from the group consisting of magnesium-based powder and aluminum-based powder.
  • the metallic material for the solidifying agent according to the present invention is not limited to the above examples.
  • the amount of metallic material when the amount of metallic material is less than 0.1 wt% based on the total weight of the solidifying agent, the effect of drying acceleration by metallic heating and foaming expansion due to the reaction with the inorganic material become insignificant. In contrast, when the amount of metallic material exceeds 10 wt%, economic benefits are negated. Thus, it is preferred that the amount of metallic material fall within the above range.
  • the absorbent material is at least one selected from the group consisting of super absorbent polymers and silica gel.
  • the absorbent material for the solidifying agent according to the present invention is not limited to the above examples.
  • the amount of absorbent material when the amount of absorbent material is less than 0.1 wt% based on the total weight of the solidifying agent, its ability to absorb water becomes insignificant. In contrast, when the amount of absorbent material exceeds 10 wt%, water is previously absorbed before dispersion and heating, and thus the reaction may be somewhat retarded. Hence, it is preferred that the amount of absorbent material fall within the above range.
  • the carrier is at least one selected from the group consisting of diatomite, talc, zeolite, and acid clay.
  • the carrier for the solidifying agent according to the present invention is not limited to the above examples.
  • the organic material is at least one selected from the group consisting of paraffin, stearic acid, and wax.
  • the organic material for the solidifying agent according to the present invention is not limited to the above examples.
  • the reaction accelerator is at least one selected from the group consisting of calcium chloride, sulfonic acid-based water-reducing agents, and lignin-based water-reducing agents.
  • the reaction accelerator for the solidifying agent according to the present invention is not limited to the above examples.
  • the amount of reaction accelerator when the amount of reaction accelerator is less than 0.1 wt% based on the total weight of the solidifying agent, the effect of binding acceleration of the mixing components is insignificant. In contrast, when the amount of reaction accelerator exceeds 10 wt%, economic benefits are negated. Hence, it is preferred that the amount of reaction accelerator fall within the above range.
  • cement functions to aid the binding of particles and decrease the gap between particles, thus inhibiting the scattering of the particles and blocking the leaching of harmful material, thereby preventing the generation of offensive odors. Further, cement imparts strength to construction material, which is manufactured using the solidifying agent of the present invention, as mentioned later, and improves water permeability.
  • Fly ash which is generated in a power plant or an incineration plant, is preferably used, and functions to aid the absorption of water from sludge, deodorization, and a pozz)lan reaction.
  • Slag exhibits hydraulic activity in the presence of an alkaline or sulfate activator upon action with the solidifying agent composition according to the present invention by mixing it with water of sewage sludge.
  • the magnesium powder and/or aluminum powder function to discharge water from soil particles while expanding sewage sludge through metallic heating.
  • the super absorbent polymer which is a resin that absorbs tens to hundreds of times its weight of water, functions to absorb water from soil particles so that sludge particles are uniformly dispersed without adhering to each other upon stirring, thus accelerating the drying.
  • Silica gel having high absorption efficiency, acts with paraffin or stearic acid, so that the drying time can be reduced when heat is applied to dry the sludge.
  • Diatomite which is a porous material, is used as a carrier for absorbing 3-4 times its weight of water upon solidification of the sludge, and thus, it can hold the discharged water to retard re-penetration of such water into soil particles, and the particles are dispersed.
  • Talc is hydrophobic but has affinity for organic material, and thus is attached with the organic material but is hydrophobic for water contained in the sludge when mixed with the sludge, ultimately dispersing the particles upon stirring.
  • Zeolite which is a porous material, functions to efficiently adsorb heavy metals, in particular, mercury, zinc, cadmium, etc., contained in the sludge. Further, zeolite has adsorption selectivity to ammonia, thus exhibiting the effect of removing offensive odors.
  • Acid clay has high absorption power and water absorption efficiency, thus exhibiting an effect of drying the sludge.
  • Paraffin, stearic acid, and wax function to aid the dispersion of the particles.
  • the calcium chloride, sulfonic acid-based water-reducing agent, and lignin-based water-reducing agent function to accelerate the curing reaction of the sludge.
  • cement or quicklime which is an inorganic material contained in the solidifying agent, performs a hydration reaction and a heating reaction with water present in the sewage or wastewater sludge.
  • the metallic material in the accelerating admixture creates an ion exchange phenomenon between the free calcium ion (Ca + ) of Ca(OH) and the monovalent ion of a target material. As such, the ion
  • a new poz»lan reaction product such as calcium silicate hydrate (CSH, CaO-SiO -H O compound), calcium aluminate hydrate (CAH, CaO-Al O -H O compound), or calcium aluminate (CA, CaO-Al O compound), is
  • the soil particles of the sludge generate foaming gas such that the agglomerated particles expand.
  • the molecules of the super absorbent polymer in the accelerating admixture are instantaneously adsorbed on the surface of the sewage sludge, thus imparting a negative charge thereto. While the sewage sludge particles imparted with the negative charge are separated, water accumulated in the sewage sludge is discharged.
  • the carrier including diatomite or the like, belonging to the accelerating admixture, acts, and further, an ettringite layer is formed on the surface of the sludge particles using an inorganic curing agent and gypsum for imparting the sludge with a high dispersion effect and a retardation effect (granulation of the particles is retarded via an inorganic solidification reaction).
  • this layer plays a role in retarding the agglomeration of the sludge, thereby increasing the drying efficiency.
  • zeolite contained in the accelerating admixture absorbs ammonia gas, thereby reducing the offensive odor of the sludge.
  • the solidifying agent according to the present invention is mixed with concentrated sludge or dehydrated sludge in a sewage or wastewater treatment plant at an appropriate mixing ratio, after which drying is conducted, thus solidifying the sludge.
  • the solidifying agent of the present invention be mixed with the sewage or wastewater sludge.
  • the solidifying agent and the sewage or wastewater sludge may be mixed through typical mixing means.
  • the mixing means include, but are not limited to, a twin type mixer and a ribbon type mixer, as illustrated in FIGS. 6 and 7, respectively.
  • a Henschell mixer and a non-gravitational mixer may be examples thereof.
  • the solidifying agent according to the present invention when the solidifying agent according to the present invention is mixed in an amount of 3-15 wt% based on the total weight of the concentrated or dehydrated sewage or wastewater sludge through a typical process, the sewage or wastewater sludge is solidified and is then naturally cured or dried for a predetermined period of time, resulting in solidified sludge.
  • a typical dryer may be used for rapid drying.
  • the sludge thus dried and solidified may be used as waste landfill cover material, road sub- base layer material, construction aggregate or retaining wall backfill material, and further, may be molded into paving blocks, boundary stone, bricks or exterior material.
  • the solidifying agent according to the present invention may be used to solidify any material containing a large amount of water, in addition to the solidification of the sewage or wastewater sludge.
  • first construction material which is manufactured by solidifying the sewage or wastewater sludge using the solidifying agent of the present invention (first solidifying agent)
  • first solidifying agent may be used as an agent for solidifying sewage or wastewater sludge (second solidifying agent) by mixing it with the solidifying agent (first solidifying agent) at an appropriate mixing ratio.
  • the solidifying agent of the present invention is mixed with 50-67 wt% of the construction material of the present invention (first construction material), after which the mixture thus obtained is used in an amount of 3-25 wt% based on the total weight of the dehydrated sewage or wastewater sludge or concentrated sewage or wastewater sludge to solidify sewage or wastewater sludge, whereby the sewage or wastewater sludge thus solidified may be used as a construction material (second construction material).
  • the second solidifying agent is used in an amount of 15-25 wt% based on the total weight of the dehydrated sewage or wastewater sludge or concentrated sewage or wastewater sludge, thus manufacturing a construction material (second construction material).
  • the construction material according to the present invention may be used as road sub-base layer material or construction aggregate, and as well, may be reused to solidify the sewage or wastewater sludge.
  • the construction material according to the present invention is used to solidify the sewage or wastewater sludge, thereby decreasing the amount of agent required to solidify sewage or wastewater sludge.
  • Example 4 were mixed, after which this mixture was loaded into a ribbon type mixer along with 10 kg of dehydrated sewage or wastewater sludge cake, mixed for 5 min, and naturally dried for 2 days, thus obtaining solidified sludge.
  • the coefficient of water permeability was decreased in proportion to the increase in the mixing ratio of the solidifying agent, and was also decreased in proportion to the increase in the curing time.
  • the decrement in the coefficient of water permeability for the first period up to 14 days was seen to be greater than that for the second period between 14 days and 28 days, and the coefficient of water permeability was shown to gently decrease after 14 days.
  • the compressive strength of the sewage or wastewater sludge solidified using the solidifying agent of the present invention is observed to be 0.5 kg/cm 2 or more after curing for 7 days, as shown in Table 2.
  • Unoonfined compressive strength necessary for the movement of construction machines is typically set to 0.5 kg/cm 2 , but the sludge solidified with the solidifying agent of the present invention can ensure sufficient movement of machines in the case where it is used as daily and intermediate cover materials in waste landfills.
  • the mixing ratio of the components of the solidifying agent is specified in the embodiments, but may be varied depending on the end use. However, such variations should not be understood separately from the technical spirit or scope of the present invention, and should not depart from the scope and spirit of the invention as disclosed in the accompanying claims.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Soil Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Combustion & Propulsion (AREA)
  • Treatment Of Sludge (AREA)

Abstract

L'invention concerne un agent solidifiant pour solidifier des boues d'égout ou d'eaux usées et un matériau de construction fabriqué à partir de ces boues. L'agent solidifiant comprend 70 à 90 % en poids de matière minérale; 0,1 à 10 % en poids de matière métallique; 0,2 à 10 en poids de matière absorbante; et 2 à 10 % en poids d'un support, et le matériau de construction est fabriqué par mélange des boues d'égout ou d'eaux usées et de 3 à 15 % en poids d'agent solidifiant sur la base du poids total des boues. Lors de la solidification de ces boues, l'agent solidifiant entraîne non seulement une solidification classique mais aussi une expansion par moussage, ce qui a pour effet d'absorber instantanément l'eau et de disperser la boue, d'où une réduction du temps de séchage, stabilisant et solidifiant ainsi la boue. La boue d'égout, qui est solidifiée au moyen de l'agent solidifiant, peut être utilisée diversement en tant que matériau de construction, notamment comme matériau de revêtement d'une décharge, comme matériau de couche de base sous-jacente, comme agrégat de construction, ou comme matériau de remblai d'un mur de soutènement.
PCT/KR2008/002340 2007-04-24 2008-04-24 Agent pour solidifier des boues d'égout ou d'eaux usées et matériau de construction fabriqué à partir de ces boues Ceased WO2008130208A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR20070040019A KR100812828B1 (ko) 2007-04-24 2007-04-24 하ㆍ폐수슬러지를 고형화시키는 고화제(파라픽스) 및 이를이용하여 제조되는 복토재
KR10-2007-0040019 2007-04-24

Publications (1)

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WO2008130208A1 true WO2008130208A1 (fr) 2008-10-30

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PCT/KR2008/002340 Ceased WO2008130208A1 (fr) 2007-04-24 2008-04-24 Agent pour solidifier des boues d'égout ou d'eaux usées et matériau de construction fabriqué à partir de ces boues

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WO (1) WO2008130208A1 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102050559A (zh) * 2010-06-29 2011-05-11 中国石油天然气股份有限公司 一种含油污泥浓缩剂及其制备和应用
WO2011015889A3 (fr) * 2009-08-03 2011-05-19 Milli Spanovic Dispositif et procédé pour le traitement de solutions concentrées issues d'eaux usées drainées de déchets communaux et industriels
WO2011148205A1 (fr) * 2010-05-27 2011-12-01 Miiii Spanovic Dispositif et traitement de formation de conglomérats siliceux solidifiés provenant du traitement de boues
EP2407440A1 (fr) * 2010-07-16 2012-01-18 Recoval Belgium Procédé de recyclage des eaux usées à partir d'un procédé de traitement de laitier d'acier inoxydable
FR3029195A1 (fr) * 2014-11-27 2016-06-03 Stephane Delheur Nouvelle composition pour faciliter le transport des boues
DE102016110866A1 (de) 2016-06-14 2017-12-14 Omid Akhavas Ökologischer Mulch, Verfahren und Vorrichtung zu dessen Herstellung sowie dessen Verwendung
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CN114478058A (zh) * 2022-01-10 2022-05-13 中国石化集团南京化学工业有限公司 一种提高化工废水可生化性的污泥炭基微电解填料及其制法和应用

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FR3029195A1 (fr) * 2014-11-27 2016-06-03 Stephane Delheur Nouvelle composition pour faciliter le transport des boues
DE102016110866A1 (de) 2016-06-14 2017-12-14 Omid Akhavas Ökologischer Mulch, Verfahren und Vorrichtung zu dessen Herstellung sowie dessen Verwendung
CN109437800A (zh) * 2018-12-11 2019-03-08 湖南昌迅科技环保股份有限公司 一种以盐石膏为原料制备的膨胀回填料及其制备方法
CN110000184A (zh) * 2019-04-15 2019-07-12 浙江理工大学 一种用于生活垃圾填埋场中间覆盖层的材料及其制备方法
CN111675453A (zh) * 2020-04-30 2020-09-18 兴源环境科技股份有限公司 一种湖泊底泥固化剂
CN111675453B (zh) * 2020-04-30 2022-06-24 兴源环境科技股份有限公司 一种湖泊底泥固化剂
CN113511694A (zh) * 2021-05-21 2021-10-19 南京乐透思环保科技有限公司 一种复合海绵材料及其制备方法和在处理高盐、高热值废水中的应用
CN114478058A (zh) * 2022-01-10 2022-05-13 中国石化集团南京化学工业有限公司 一种提高化工废水可生化性的污泥炭基微电解填料及其制法和应用

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