WO2020217841A1 - Agent de purification d'eau et procédé de purification d'eau - Google Patents

Agent de purification d'eau et procédé de purification d'eau Download PDF

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Publication number
WO2020217841A1
WO2020217841A1 PCT/JP2020/013647 JP2020013647W WO2020217841A1 WO 2020217841 A1 WO2020217841 A1 WO 2020217841A1 JP 2020013647 W JP2020013647 W JP 2020013647W WO 2020217841 A1 WO2020217841 A1 WO 2020217841A1
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Prior art keywords
water
jute
purifying agent
particle diameter
cumulative
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PCT/JP2020/013647
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English (en)
Japanese (ja)
Inventor
修二 大橋
泰祐 廣芝
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Dexerials Corp
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Dexerials Corp
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Priority to CN202080030302.7A priority Critical patent/CN113710342B/zh
Publication of WO2020217841A1 publication Critical patent/WO2020217841A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/01—Separation of suspended solid particles from liquids by sedimentation using flocculating agents
    • 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
    • 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
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56—Macromolecular compounds
    • 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
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • 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
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • C02F1/62—Heavy metal compounds
    • 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
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • C02F1/62—Heavy metal compounds
    • C02F1/64—Heavy metal compounds of iron or manganese

Definitions

  • the present invention relates to a water purifying agent and a water purifying method using the water purifying agent.
  • inorganic flocculants such as iron chloride, aluminum sulfate, and polyaluminum chloride (PAC) for insolubilizing inorganic ions
  • PAC polyaluminum chloride
  • the amount of the inorganic flocculant added can be reduced by using a flocculant composed of polyaluminum chloride having a specific basicity and a dimethyldiallylammonium chloride-based polymer (for example, Patent Document 1). reference).
  • a water purifying agent composed of a granulated product containing a mixture of Nagasaku jute powder and a polymer flocculant, wherein the median diameter (D 50 ) of the granulated product is 250 ⁇ m or more and 850 ⁇ m or less.
  • D 50 median diameter
  • Patent Document 2 discloses a water purification performance capable of reducing the concentration of inorganic ions to a desired concentration or less in a short time, but the amount of the inorganic flocculant used for the insolubilization treatment of inorganic ions is used. There is no description or suggestion about the effect of reduction and reduction of sludge generation amount, and water that has excellent water purification performance, can reduce the amount of inorganic flocculant used, and can reduce sludge generation amount by reducing sludge water content. The provision of a purifying agent has been desired.
  • An object of the present invention is to solve the above-mentioned problems in the past and to achieve the following objects. That is, an object of the present invention is to provide a water purifying agent which is excellent in water purification performance, can reduce the amount of inorganic flocculant used, and can reduce the amount of sludge generated due to a decrease in sludge water content.
  • a water purifying agent composed of granules containing a mixture of Nagasaku Jute powder and a polymer flocculant.
  • the water purifying agent is characterized in that the cumulative 10% volume particle diameter D 10 of the granulated product is 100 ⁇ m or more and 400 ⁇ m or less, and the cumulative 90% volume particle diameter D 90 is 800 ⁇ m or more and 1,200 ⁇ m or less.
  • ⁇ 9> Dissolve the water purifying agent according to any one of ⁇ 1> to ⁇ 7> in water to obtain a dispersion of Nagasaku Homa powder and a polymer flocculant, and use it as wastewater containing inorganic unnecessary substances. It is a water purification method characterized by removing inorganic unnecessary substances in wastewater by providing the dispersion liquid.
  • ⁇ 11> Insolubilization treatment for at least one of nickel ion, fluorine ion, iron ion, copper ion, zinc ion, chromium ion, arsenic ion, cadmium ion, tin ion, and lead ion in the inorganic unnecessary substance.
  • ⁇ 12> The water purification method according to ⁇ 11>, wherein the amount of the inorganic flocculant used in the insolubilization treatment is 4,500 ppm or less.
  • the above-mentioned problems in the prior art can be solved, the above object can be achieved, the water purification performance is excellent, the amount of the inorganic flocculant used can be reduced, and the sludge due to the reduction of the sludge water content can be reduced. It is possible to provide a water purifying agent that can reduce the amount of water generated.
  • FIG. 1 is a diagram showing the identification numbers of "Jute No. 3" and "Jute” used in the present invention.
  • the water purifying agent of the present invention is a water purifying agent composed of a granulated product containing a mixture of Nagasaku bran powder and a polymer flocculant, and the cumulative 10% volume particle diameter D 10 of the granulated product is 100 ⁇ m. It is 400 ⁇ m or less, and the cumulative 90% volume particle diameter D 90 is 800 ⁇ m or more and 1,200 ⁇ m or less.
  • the present inventors have diligently studied a water purification agent containing plant powder in order to provide a water purification agent having excellent water purification performance.
  • the cumulative 10% volume particle diameter D 10 and the cumulative 90% volume particle diameter D 90 of the granulated product obtained by kneading the Nagasaku sludge powder and the polymer flocculant are within a specific range. It was found that the water purification performance is excellent, the amount of inorganic coagulant used can be reduced, and the amount of sludge generated can be reduced by reducing the sludge water content.
  • the present invention targets industrial wastewater, for example, industrial wastewater containing inorganic unnecessary substances such as nickel, fluorine, iron, copper, zinc, chromium, arsenic, cadmium, tin, and lead.
  • inorganic unnecessary substances such as nickel, fluorine, iron, copper, zinc, chromium, arsenic, cadmium, tin, and lead.
  • purification of water the inorganic ions such as nickel ions, fluorine ions, and iron ions in the inorganic unnecessary substances are insolubilized by an inorganic flocculant, and the suspended solid matter (in the present invention, " (Also referred to as "microfloc) is formed, the microfloc is coagulated and settled, and solid-liquid separation is performed.
  • the particle size of the granulated product can be made relatively large, but the cumulative 10% volume particle diameter D 10 of the granulated product exceeds 400 ⁇ m and is cumulative. If the 90% volume particle diameter D 90 exceeds 1200 ⁇ m, the sedimentation speed becomes high, and the adsorption effect of the granulated product cannot be sufficiently exerted. Therefore, the granulated products having a cumulative 10% volume particle diameter D 10 and a cumulative 90% volume particle diameter D 90 in a specific range can fully utilize the characteristics of Nagasaku edible hemp and have a sufficient adsorption effect of microfloc. It shows excellent water purification performance, and it is thought that the amount of inorganic coagulant used for insolubilizing inorganic ions can be reduced, and the amount of sludge generated can be reduced by reducing the sludge water content.
  • the granulated product specified in the present invention can be preferably produced by the production method described later.
  • the specific configuration of the water purifying agent will be described.
  • the Nagasaku Jute powder has a high cation exchange function and has pores capable of adsorbing microflocs in wastewater containing the inorganic ions, and thus can be preferably used.
  • leaves or stems can be preferably used as the site of Jute.
  • the "Jute No. 4" has the following characteristics.
  • Characteristic characteristics: Medium-Jute No. 4 is a regular long-fruited jute. It is a green stem, the stem is cylindrical, the shape of a needle with dispersed leaves, the handle of the leaf is green, the corner with the main stem is small, and there are lateral buds and jute.
  • the calyx is green, long-fruited cylinder, five chambers, and the seeds are late-ripening varieties.
  • the polymer flocculant is not particularly limited as long as it has an effect of removing the inorganic unnecessary substances in the wastewater, as in the case of Nagasaku chlorophyll, and can be appropriately selected depending on the intended purpose.
  • polyacrylamide PAM
  • a partially hydrolyzed salt of polyacrylamide, polyamine, sodium alginate, sodium polyacrylate, sodium carboxymethyl cellulose (CMC) salt and the like can be mentioned.
  • polyacrylamide is preferable.
  • the polyacrylamide include those having an acrylate or a carboxylic acid salt.
  • polyacrylamide a commercially available product can be used, and examples of the commercially available product include Flopan AN934 (polyacrylamide having an acrylate in the side chain) and Flopan AN913 (polyacrylamide having a carboxylate in the side chain). ) (Both are manufactured by SNF Co., Ltd.).
  • the mass composition ratio of the long moon jute powder to the polymer flocculant is preferably 9: 1 to 1: 9, more preferably 5: 5 to 1: 9, and even more preferably 3: 7 to 1: 9. Within this mass composition ratio range, excellent water purification performance with a sufficient adsorption effect of microflocs is exhibited.
  • the mass composition ratio can be calculated based on the dry mass.
  • the granulated product exhibits the following characteristics.
  • Cumulative 10% volume particle diameter D 10 , cumulative 90% volume particle diameter D 90 The cumulative 10% volume particle diameter D 10 of the granulated product specified in the present invention is 100 ⁇ m or more and 400 ⁇ m or less, and the cumulative 90% volume particle diameter D 90 is 800 ⁇ m or more and 1,200 ⁇ m or less.
  • the cumulative 10% volume particle diameter D 10 of the granulated product is 100 ⁇ m or more and 400 ⁇ m or less, and the cumulative 90% volume particle diameter D 90 is 800 ⁇ m or less, the adsorption effect of microfloc by the powder of Nagasaku jute is sufficient. It can be demonstrated.
  • the cumulative 10% volume particle diameter D 10 of the granulated product is less than 100 ⁇ m, fine powder is generated, and there is a concern that a defect during manufacturing or dust generation during charging may occur.
  • D 90 exceeds 1200 ⁇ m, insoluble matter is generated, and there is a concern that the piping may be clogged and the water treatment efficiency may be deteriorated.
  • D 10 is more than 400 ⁇ m and D 90 is less than 800 ⁇ m, D 50 (median diameter) of the granulated product may be out of the region where good water purification performance is exhibited.
  • the measured small particles 10% cumulative particle size of 10% accumulation unit from the side volume particle diameter D 10 on the basis of the volume-based particle size distribution small particles measured based on the volume-based particle size distribution
  • the particle size of the 90% cumulative part from the side is called the cumulative 90% volume particle size D 90 .
  • the D 10 and D 90 can be measured by, for example, a commercially available particle size distribution measuring device such as Master Sizar 2000 (manufactured by Malvern Instruments).
  • the granulated product specified in the present invention is formed into a sheet by a kneading step of mixing the Nagasaku yellow hemp powder and the polymer flocculant, adding water and kneading to obtain a kneaded product, and a stretching method.
  • Manufacture including a stretching / sheeting step of forming into a sheet to obtain a sheet-shaped molded product, a drying step of drying the sheet-shaped molded product to obtain a dried sheet, and a crushing step of crushing the dried sheet.
  • a classification step of classifying the granulated product by a sieve may be included.
  • the present inventors have experimentally confirmed that if a shearing force (share) is applied too strongly to the kneaded material during granulation, the polymer flocculant enters the porous portion of the fibers of Nagasaku Jute.
  • the granulated product has a porous shape in which voids (porous) with many holes are present due to the fiber structure of Jute.
  • the share of the kneaded product could be controlled, and the granulated product produced by such the stretching / sheeting process had a length in contact with the wastewater. It was found that the porous part of jute could be sufficiently secured and that it showed a good adsorption effect on inorganic unnecessary substances.
  • the kneaded product is gradually stretched by a roller, and a sheet-shaped molded product having a predetermined thickness is formed step by step.
  • a molded product while maintaining a good viscosity of the kneaded product, and this may also be effective in exerting the adsorption effect of Nagasaku Jute. I suspect there isn't.
  • the dried product of Nagasaku Jute is coarsely pulverized, then finely pulverized to obtain a powder of Nagasaku Jute of a desired size, and then the obtained powder of Nagasaku Jute and high polymer are obtained.
  • Mix with a molecular flocculant add water and knead.
  • the amount of water added it is preferable to add, for example, about three times the mass of the total mass of the Nagasaku jute powder and the polymer flocculant.
  • the kneading is preferably performed by using a mixer, for example, a vertical mixer such as a planetary mixer, and setting the rotation speed and the time within a predetermined range.
  • the rotation speed and time during kneading in the mixer can be appropriately set in consideration of conditions such as the mixing ratio of the Nagasaku jute powder and the polymer flocculant.
  • the rotation speed is 20 rpm to 150 rpm.
  • the time is preferably 5 to 25 minutes.
  • the obtained kneaded product may be stretched to a thickness of 4 mm to 20 mm, preferably about 10 mm by a stretching method using a roller, and molded into a sheet shape.
  • Conditions such as the mixing ratio of Nagasaku jute powder and polymer, the amount of water added, the mixing speed (the number of rotations of the mixer at the time of kneading), the mixing time (the kneading time in the mixer), or the stretching / stretching in the kneading step.
  • the stretching conditions in the sheeting step By appropriately changing the stretching conditions in the sheeting step, the share of the kneaded product can be controlled.
  • the drying step it is preferable to dry the obtained molded product at a temperature of 80 ° C. to 150 ° C. for 2 hours to 12 hours using a multi-stage hot air dryer.
  • a pulverizer for example, an air flow type ultrafine pulverizer so that the median diameter is in the range of 250 ⁇ m to 850 ⁇ m.
  • the crushed powder is subjected to a classification machine, for example, a vibration sieving machine or a cartridge type sieving machine, and the cumulative 10% volume particle diameter D 10 is 100 ⁇ m or more and 400 ⁇ m or less, and the cumulative 90% volume particle diameter.
  • D 90 is 800 ⁇ m or more and 1,200 ⁇ m or less.
  • the granules having a particle size of 100 ⁇ m or more and 1,200 ⁇ m or less are used by sieving to positively separate and eliminate (cut) the granules having a particle size of less than 100 ⁇ m and the granules having a particle size of more than 1200 ⁇ m. Then, it is more preferable.
  • the above-mentioned water purification agent of the present invention is dissolved in water to obtain a dispersion liquid of Nagasaku Homa powder and a polymer flocculant, and the dispersion liquid is used for wastewater to be discharged.
  • the inorganic unnecessary substance include an inorganic unnecessary substance having at least one of nickel, fluorine, iron, copper, zinc, chromium, arsenic, cadmium, tin, and lead.
  • Microflocs are formed by insolubilizing inorganic ions such as nickel ions, fluorine ions, and iron ions in the inorganic unnecessary substances in the wastewater by adding an inorganic flocculant.
  • the dispersion liquid prepared as an aqueous solution of 0.1% by mass to 0.2% by mass is provided to the waste water.
  • the wastewater is purified by coagulating and sedimenting the microflocs and removing the sediment separated by sedimentation.
  • a base is added to the wastewater to make the wastewater basic, and then an inorganic flocculant is added to insolubilize the inorganic ions.
  • the inorganic flocculant examples include ferric chloride, polyferric sulfate, ferrous sulfate, aluminum sulfate, polyaluminum chloride (PAC), and slaked lime.
  • the amount of the inorganic coagulant used is not particularly limited and varies depending on the type of wastewater, the amount of inorganic unnecessary substances in the wastewater, the type of the inorganic coagulant, etc., and cannot be unconditionally specified, but is 4,500 ppm or less. It is preferable, and 4,000 ppm or less is more preferable.
  • the polymer flocculant may be added alone after the base is added to the wastewater and the inorganic flocculant is added and before the water purifying agent of the present invention is added. If the polymer flocculant is added alone before the water purifying agent of the present invention is added, the floc size of the microfloc in the wastewater can be increased.
  • Example 1 ⁇ Drainage> As the wastewater to be treated, Zn and Ni-based raw water wastewater (Zn concentration: 300 ppm, Ni concentration: 100 ppm) was used.
  • the obtained kneaded product was stretched by a roller using a press machine (Komatsu Industries Corp., 45t press machine) to prepare a sheet-shaped molded product having a thickness of about 10 mm.
  • This molded product was dried at 120 ° C. for 3 hours and further at 150 ° C. for 2 hours using a multi-stage hot air dryer (rack type oven device manufactured by Nanyo Seisakusho Co., Ltd.).
  • the dried sheet was pulverized using an airflow type ultrafine pulverizer (selenium mirror manufactured by Masuko Sangyo Co., Ltd.).
  • (A) was mixed at a ratio of 60%, (B) at 20%, and (C) at a ratio of 20% as follows, and the cumulative 10% volume particle diameter of the granulated product was obtained.
  • the D 10 was adjusted to 282 ⁇ m, and the cumulative 90% volume particle diameter D 90 was adjusted to 962 ⁇ m.
  • the cumulative 10% volume particle diameter D 10 and the cumulative 90% volume particle diameter D 90 were measured by Master Sizar 2000 (manufactured by Malvern Instruments).
  • (A) Those having a particle size larger than 1000 ⁇ m are removed by sieving with a nominal opening of 1 mm (mesh No.
  • ⁇ Sludge moisture content> The test water was filtered and collected, and the mass A of the sludge was measured. Subsequently, the mass B of the sludge dried in an oven at 105 ° C. (water content of 0.05% or less) was measured. Here, a heat-drying moisture meter MX-50 (manufactured by A & D Co., Ltd.) was used to confirm the amount of water. From these, the sludge water content was determined by dividing the mass (AB) of water contained in the sludge by the mass (A) of the sludge to obtain a percentage.
  • Example 2 In the ⁇ primary agglutination> of Example 1, purification treatment was performed in the same manner as in Example 1 except that the amount of polyaluminum chloride (PAC) added was changed to 4,375 ppm, and "Zn concentration and Ni concentration", “Amount of suspended solids (SS)” and “sludge moisture content” were measured. The results are shown in Table 1.
  • PAC polyaluminum chloride
  • Example 3 In the ⁇ primary agglutination> of Example 1, purification treatment was performed in the same manner as in Example 1 except that the amount of polyaluminum chloride (PAC) added was changed to 3,750 ppm, and "Zn concentration and Ni concentration", “Amount of suspended solids (SS)” and “sludge moisture content” were measured. The results are shown in Table 1.
  • PAC polyaluminum chloride
  • Example 4 In the ⁇ manufacturing method of water purifying agent >> of Example 1, (A) is mixed at a ratio of 60%, (B) is mixed at a ratio of 20%, and (C) is mixed at a ratio of 20% as follows to produce a granulated product. Granules were obtained in the same manner as in Example 1 except that the cumulative 10% volume particle diameter D 10 was adjusted to 100 ⁇ m and the cumulative 90% volume particle diameter D 90 was adjusted to 800 ⁇ m. The cumulative 10% volume particle diameter D 10 and the cumulative 90% volume particle diameter D 90 were measured by Master Sizar 2000 (manufactured by Malvern Instruments). (A) Those having a particle size larger than 850 ⁇ m are removed by sieving with a nominal opening of 850 ⁇ m (mesh No.
  • Example 5 In the ⁇ manufacturing method of water purifying agent >> of Example 1, (A) is mixed at a ratio of 60%, (B) is mixed at a ratio of 20%, and (C) is mixed at a ratio of 20% as follows to produce a granulated product.
  • a granulated product was obtained in the same manner as in Example 1 except that the cumulative 10% volume particle diameter D 10 was adjusted to 400 ⁇ m and the cumulative 90% volume particle diameter D 90 was adjusted to 1200 ⁇ m.
  • the cumulative 10% volume particle diameter D 10 and the cumulative 90% volume particle diameter D 90 were measured by Master Sizar 2000 (manufactured by Malvern Instruments).
  • Example 6 In the ⁇ manufacturing method of water purifying agent >> of Example 1, (A) is mixed at a ratio of 60%, (B) is mixed at a ratio of 20%, and (C) is mixed at a ratio of 20% as follows to produce a granulated product. Granules were obtained in the same manner as in Example 1 except that the cumulative 10% volume particle diameter D 10 was adjusted to 200 ⁇ m and the cumulative 90% volume particle diameter D 90 was adjusted to 900 ⁇ m. The cumulative 10% volume particle diameter D 10 and the cumulative 90% volume particle diameter D 90 were measured by Master Sizar 2000 (manufactured by Malvern Instruments).
  • Example 7 In the ⁇ manufacturing method of water purifying agent >> of Example 1, (A) is mixed at a ratio of 60%, (B) is mixed at a ratio of 20%, and (C) is mixed at a ratio of 20% as follows to produce a granulated product. Granules were obtained in the same manner as in Example 1 except that the cumulative 10% volume particle diameter D 10 was adjusted to 350 ⁇ m and the cumulative 90% volume particle diameter D 90 was adjusted to 1100 ⁇ m. The cumulative 10% volume particle diameter D 10 and the cumulative 90% volume particle diameter D 90 were measured by Master Sizar 2000 (manufactured by Malvern Instruments). (A) Those having a particle size larger than 1000 ⁇ m are removed by sieving with a nominal opening of 1 mm (mesh No.
  • Example 8 In the same manner as in Example 1 except that 750 g of Nagasaku jute powder and 6750 g of polymer flocculant (polyacrylamide (PAM1)) were changed in ⁇ Method for producing water purifying agent >> of Example 1. A granulated product having a mass composition ratio of Nagasaku jute and a polymer flocculant of 1: 9 was obtained, and this granulated product was used as a water purifying agent A2. Purification treatment was performed in the same manner as in Example 2 except that the obtained water purifying agent A2 was used, and "Zn concentration and Ni concentration", "amount of suspended solids (SS)", and "sludge water content”. was measured. The results are shown in Table 2.
  • Example 9 In the same manner as in Example 1 except that 2250 g of Nagasaku Jute powder and 5250 g of polymer flocculant (polyacrylamide (PAM1)) were changed in ⁇ Method for producing water purifying agent >> of Example 1. A granulated product having a mass composition ratio of Nagasaku jute and a polymer flocculant of 3: 7 was obtained, and this granulated product was used as a water purifying agent A3. Purification treatment was performed in the same manner as in Example 2 except that the obtained water purifying agent A3 was used, and "Zn concentration and Ni concentration", "amount of suspended solids (SS)", and "sludge water content”. was measured. The results are shown in Table 2.
  • Example 10 In the ⁇ method for producing a water purifying agent >> of Example 1, the polymer flocculant (polyacrylamide (PAM1)) was replaced with a polymer flocculant (polyacrylamide (PAM2), trade name: Flopan AN934, NS Co., Ltd. A granulated product was obtained in the same manner as in Example 1 except that it was changed to F, polyacrylamide having an acrylate in the side chain. Purification treatment was performed in the same manner as in Example 2 except that the water purifying agent A4 composed of the obtained granulated product was used, and "Zn concentration and Ni concentration", “amount of suspended solids (SS)", and "Sludge moisture content” was measured. The results are shown in Table 2.
  • Example 1 the water purifying agent A5 composed of the polymer flocculant A (N-110, manufactured by MT Aquapolymer Co., Ltd.) was used instead of the water purifying agent A1 in the same manner as in Example 1. Purification treatment was performed, and "Zn concentration and Ni concentration”, “amount of suspended solids (SS)”, and "sludge water content” were measured. The results are shown in Table 3.
  • Example 2 (Comparative Example 2) In Example 2, the water purifying agent A5 composed of the polymer flocculant A (N-110, manufactured by MT Aquapolymer Co., Ltd.) was used instead of the water purifying agent A1 in the same manner as in Example 2. Purification treatment was performed, and "Zn concentration and Ni concentration”, “amount of suspended solids (SS)”, and "sludge water content” were measured. The results are shown in Table 3.
  • Example 3 (Comparative Example 3)
  • the water purifying agent A5 composed of the polymer flocculant A (N-110, manufactured by MT Aquapolymer Co., Ltd.) was used instead of the water purifying agent A1 in the same manner as in Example 3. Purification treatment was performed, and "Zn concentration and Ni concentration”, “amount of suspended solids (SS)", and "sludge water content” were measured. The results are shown in Table 3.
  • Example 4 In the ⁇ manufacturing method of water purifying agent >> of Example 1, (A) is mixed at a ratio of 60%, (B) at 20%, and (C) at a ratio of 20% as follows, and the granulated product A granulated product was obtained in the same manner as in Example 1 except that the cumulative 10% volume particle diameter D 10 was 90 ⁇ m and the cumulative 90% volume particle diameter D 90 was adjusted to 790 ⁇ m. The cumulative 10% volume particle diameter D 10 and the cumulative 90% volume particle diameter D 90 were measured by Master Sizar 2000 (manufactured by Malvern Instruments). (A) 60% of the total amount of granulated material is sieved with a nominal opening of 710 ⁇ m (mesh No.
  • Example 5 In the ⁇ manufacturing method of water purifying agent >> of Example 1, (A) is mixed at a ratio of 60%, (B) is mixed at a ratio of 20%, and (C) is mixed at a ratio of 20% as follows to produce a granulated product.
  • a granulated product was obtained in the same manner as in Example 1 except that the cumulative 10% volume particle diameter D 10 was adjusted to 410 ⁇ m and the cumulative 90% volume particle diameter D 90 was adjusted to 1210 ⁇ m.
  • the cumulative 10% volume particle diameter D 10 and the cumulative 90% volume particle diameter D 90 were measured by Master Sizar 2000 (manufactured by Malvern Instruments).
  • Example 6 In the ⁇ manufacturing method of water purifying agent >> of Example 1, (A) is mixed at a ratio of 60%, (B) is mixed at a ratio of 20%, and (C) is mixed at a ratio of 20% as follows to produce a granulated product. Granules were obtained in the same manner as in Example 1 except that the cumulative 10% volume particle diameter D 10 was 90 ⁇ m and the cumulative 90% volume particle diameter D 90 was adjusted to 962 ⁇ m. The cumulative 10% volume particle diameter D 10 and the cumulative 90% volume particle diameter D 90 were measured by Master Sizar 2000 (manufactured by Malvern Instruments). (A) Those having a particle size larger than 850 ⁇ m are removed by sieving with a nominal opening of 850 ⁇ m (mesh No.
  • Example 7 In the ⁇ manufacturing method of water purifying agent >> of Example 1, (A) is mixed at a ratio of 60%, (B) is mixed at a ratio of 20%, and (C) is mixed at a ratio of 20% as follows to produce a granulated product. Granules were obtained in the same manner as in Example 1 except that the cumulative 10% volume particle diameter D 10 was 282 ⁇ m and the cumulative 90% volume particle diameter D 90 was adjusted to 790 ⁇ m. The cumulative 10% volume particle diameter D 10 and the cumulative 90% volume particle diameter D 90 were measured by Master Sizar 2000 (manufactured by Malvern Instruments).
  • Example 8 In the ⁇ manufacturing method of water purifying agent >> of Example 1, (A) is mixed at a ratio of 60%, (B) is mixed at a ratio of 20%, and (C) is mixed at a ratio of 20% as follows to produce a granulated product. A granulated product was obtained in the same manner as in Example 1 except that the cumulative 10% volume particle diameter D 10 was 410 ⁇ m and the cumulative 90% volume particle diameter D 90 was adjusted to 962 ⁇ m. The cumulative 10% volume particle diameter D 10 and the cumulative 90% volume particle diameter D 90 were measured by Master Sizar 2000 (manufactured by Malvern Instruments). (A) Those having a particle diameter larger than 1 mm are removed by sieving with a nominal opening of 1 mm (mesh No.
  • Example 9 In the ⁇ manufacturing method of water purifying agent >> of Example 1, (A) is mixed at a ratio of 60%, (B) is mixed at a ratio of 20%, and (C) is mixed at a ratio of 20% as follows to produce a granulated product. Granules were obtained in the same manner as in Example 1 except that the cumulative 10% volume particle diameter D 10 was 282 ⁇ m and the cumulative 90% volume particle diameter D 90 was adjusted to 1210 ⁇ m. The cumulative 10% volume particle diameter D 10 and the cumulative 90% volume particle diameter D 90 were measured by Master Sizar 2000 (manufactured by Malvern Instruments). (A) Those having a particle size larger than 300 ⁇ m are removed by sieving with a nominal opening of 300 ⁇ m (mesh No.
  • Example 10 Comparative Example 10
  • the purification treatment was performed in the same manner as in Example 2 except that the water purifying agent A6 made of Nagasaku sludge was used instead of the water purifying agent A1, and "Zn concentration and Ni concentration” and “suspended solids” were performed. "Amount of substance (SS)” and "sludge water content” were measured. The results are shown in Table 4.
  • the obtained kneaded product was stretched by a roller using a press machine (Komatsu Industries Corp., 45t press machine) to prepare a sheet-shaped molded product having a thickness of about 10 mm.
  • This molded product was dried at 120 ° C. for 3 hours and further at 150 ° C. for 2 hours using a multi-stage hot air dryer (rack type oven device manufactured by Nanyo Seisakusho Co., Ltd.).
  • the dried sheet was pulverized using an airflow type ultrafine pulverizer (selenium mirror manufactured by Masuko Sangyo Co., Ltd.).
  • (A) was mixed at a ratio of 60%, (B) at 20%, and (c) at a ratio of 20% as follows, and the cumulative 10% volume particle diameter of the granulated product was obtained.
  • the D 10 was adjusted to 282 ⁇ m, and the cumulative 90% volume particle diameter D 90 was adjusted to 962 ⁇ m.
  • the cumulative 10% volume particle diameter D 10 and the cumulative 90% volume particle diameter D 90 were measured by Master Sizar 2000 (manufactured by Malvern Instruments).
  • (A) Those having a particle size larger than 1000 ⁇ m are removed by sieving with a nominal opening of 1 mm (mesh No.
  • the obtained water purifying agent B1 was dissolved in water to prepare a dispersion of a 0.1% by mass aqueous solution. This dispersion was added dropwise to the wastewater composed of the supernatant containing microflocs and the precipitate at a rate of 3 mL / min with stirring. At this time, the water purifying agent B1 was added so as to be 4.5 ppm with respect to the solid content in the wastewater.
  • the method for measuring the "solid content” was obtained by measuring the slurry concentration in the wastewater with a moisture meter and calculating back.
  • Example 12 In Example 11, purification treatment was performed in the same manner as in Example 11 except that the amount of slaked lime added in ⁇ primary agglutination> was changed to 1,800 ppm, and the "F concentration” and “amount of suspended solids (SS)” were obtained. , And “sludge moisture content” were measured. The results are shown in Table 5.
  • Example 13 In Example 11, purification treatment was performed in the same manner as in Example 11 except that the amount of slaked lime added in ⁇ primary agglutination> was changed to 1,600 ppm, and the “F concentration” and “amount of suspended solids (SS)” were obtained. , And “sludge moisture content” were measured. The results are shown in Table 5.
  • Example 14 In the ⁇ manufacturing method of water purifying agent >> of Example 11, (A) is mixed at a ratio of 60%, (B) is mixed at a ratio of 20%, and (C) is mixed at a ratio of 20% as follows to produce a granulated product. Granules were obtained in the same manner as in Example 1 except that the cumulative 10% volume particle diameter D 10 was adjusted to 200 ⁇ m and the cumulative 90% volume particle diameter D 90 was adjusted to 900 ⁇ m. The cumulative 10% volume particle diameter D 10 and the cumulative 90% volume particle diameter D 90 were measured by Master Sizar 2000 (manufactured by Malvern Instruments).
  • Example 15 ⁇ Drainage> As the wastewater to be treated, plating-based raw water wastewater (Cu concentration: 100 ppm) was used.
  • Example 1 purification treatment was performed in the same manner as in Example 1 except that 6 ppm of the water purifying agent A1 was added, and the “Cu concentration” was measured as follows, and the same as in Example 1. Then, “amount of suspended solids (SS)” and “sludge water content” were measured. The results are shown in Table 6.
  • Example 16 In Example 15, purification treatment was performed in the same manner as in Example 15 except that FeCl 2 as an inorganic agglutinant in ⁇ primary agglutination> was not added, and the "Cu concentration” and “suspended solids (SS)” were determined. “Amount” and “sludge moisture content” were measured. The results are shown in Table 6.
  • Example 12 Comparative Example 12
  • the water purifying agent A5 composed of the polymer flocculant A (A-120, manufactured by MT Aqua Polymer Co., Ltd.) was used instead of the water purifying agent A1 in Example 16. Purification treatment was performed, and "Cu concentration”, “amount of suspended solids (SS)”, and “sludge water content” were measured. The results are shown in Table 6.
  • the water purifying agent of the present invention is excellent in water purification performance, the amount of the inorganic flocculant used can be reduced, and the amount of sludge generated by reducing the sludge water content can be reduced. It was confirmed that it could be planned.
  • the water purification agent of the present invention has excellent water purification performance, can reduce the amount of inorganic flocculant used, and can reduce the amount of sludge generated by reducing the sludge water content. Therefore, wastewater treatment, water purification treatment and sludge can be reduced. Can be suitably used for concentration and the like.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Removal Of Specific Substances (AREA)
  • Water Treatment By Sorption (AREA)

Abstract

L'invention concerne un agent de purification d'eau qui est composé d'un matériau granulé comprenant un mélange de poudre de Corchorus olitorius et d'un coagulant polymère, le matériau granulé ayant un diamètre de particule volumique Ｄ１０ de 10 % cumulé de 100 à 400 µm, et un diamètre de particule volumique Ｄ９０ de 90 % cumulé compris entre 800 et 1200 µm.
PCT/JP2020/013647 2019-04-26 2020-03-26 Agent de purification d'eau et procédé de purification d'eau Ceased WO2020217841A1 (fr)

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Publication number Priority date Publication date Assignee Title
JP2002263406A (ja) * 2001-03-13 2002-09-17 Yashio:Kk 凝集剤及びその製造方法
JP2015221406A (ja) * 2014-05-22 2015-12-10 黒崎白土工業株式会社 汚水処理剤
WO2016158433A1 (fr) * 2015-03-30 2016-10-06 デクセリアルズ株式会社 Agent et procédé de purification de l'eau
WO2016158256A1 (fr) * 2015-03-30 2016-10-06 デクセリアルズ株式会社 Agent d'épuration d'eau et procédé d'épuration d'eau
WO2018051849A1 (fr) * 2016-09-15 2018-03-22 デクセリアルズ株式会社 Dispersion pour purification de l'eau ainsi que procédé de fabrication celle-ci, et procédé de traitement des eaux usées

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Publication number Priority date Publication date Assignee Title
EP1486463B1 (fr) * 2003-06-10 2016-08-10 Toda Kogyo Corporation Particules composites de fer, procédés pour la production de celles-ci et pour la décontamination du sol ou des eaux souterraines avec celles-ci
JP2016052654A (ja) * 2015-10-05 2016-04-14 月島機械株式会社 浄水処理方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002263406A (ja) * 2001-03-13 2002-09-17 Yashio:Kk 凝集剤及びその製造方法
JP2015221406A (ja) * 2014-05-22 2015-12-10 黒崎白土工業株式会社 汚水処理剤
WO2016158433A1 (fr) * 2015-03-30 2016-10-06 デクセリアルズ株式会社 Agent et procédé de purification de l'eau
WO2016158256A1 (fr) * 2015-03-30 2016-10-06 デクセリアルズ株式会社 Agent d'épuration d'eau et procédé d'épuration d'eau
WO2018051849A1 (fr) * 2016-09-15 2018-03-22 デクセリアルズ株式会社 Dispersion pour purification de l'eau ainsi que procédé de fabrication celle-ci, et procédé de traitement des eaux usées

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CN113710342A (zh) 2021-11-26
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CN113710342B (zh) 2023-02-24
TW202039050A (zh) 2020-11-01

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