Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
  • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
  • B03D3/00—Differential sedimentation
• • 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
• • 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
  • C02F1/5272—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using specific organic precipitants
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
  • C08L33/24—Homopolymers or copolymers of amides or imides
  • C08L33/26—Homopolymers or copolymers of acrylamide or methacrylamide
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2101/00—Nature of the contaminant
  • C02F2101/10—Inorganic compounds
  • C02F2101/20—Heavy metals or heavy metal compounds

Definitions

• the present invention relates to a plant-derived water purification agent used for purification of water such as industrial wastewater, and a water purification method using the water purification agent.
• the present invention provides a water purification agent having a desired performance at a low cost and with a stable and repeatable accuracy when wastewater purification using a plant-derived water purification agent is performed using an automated purification device. It is an object of the present invention to provide a water purification agent that can be suitably used for an automated purification device that can be supplied well, and a water purification method using the water purification agent.
• Means for solving the problems are as follows. That is, ⁇ 1> A water purifier characterized by being a granulated product containing a mixture of plant powder and a polymer flocculant. ⁇ 2> The water purifier according to ⁇ 1>, wherein the plant is at least one of Nagatoro burlap and Morohea. ⁇ 3> The water purifier according to any one of ⁇ 1> to ⁇ 2>, wherein the polymer flocculant is polyacrylamide. ⁇ 4> The water purification agent according to any one of ⁇ 1> to ⁇ 3>, wherein the bulk specific gravity of the water purification agent is 0.4 g / cm 3 or more.
• ⁇ 5> The water according to ⁇ 4>, wherein the variation of the bulk specific gravity of the water purifier (the ratio of the difference between the maximum value and the minimum value of the bulk specific gravity with respect to the minimum value of the bulk specific gravity) is 4.5% or less. It is a cleaning agent.
• the content ratio of the plant powder to the polymer flocculant in the water purification agent is 1/1 to 9/1 in terms of mass ratio (plant powder / polymer flocculant). > The water purifier according to any one of the above.
• a water purification agent pulverizes a dried plant to obtain a plant powder having a number average particle size of 250 ⁇ m or less, and the plant powder and the polymer flocculant are mixed, and water is added to knead.
• a water purification agent according to any one of ⁇ 1> to ⁇ 6> which is produced by a production method including a granulation step of obtaining a granulated product by extrusion granulation.
• the water purifier according to any one of ⁇ 1> to ⁇ 7> is dissolved in water to obtain a dispersion of plant powder and a polymer flocculant, and the dispersion is used for drainage. It is a water purification method characterized by removing inorganic unnecessary substances.
• the above-mentioned problems can be solved and the above-mentioned object can be achieved, and when the wastewater purification treatment using a plant-derived water purification agent is performed using an automated purification device, the cost is low.
• a water purification agent that can be suitably used in an automated purification apparatus that can stably and repeatedly supply a water purification agent having a desired performance, and a water purification method using the water purification agent. Can be provided.
• the water purification agent of the present invention comprises a granulated product containing a mixture of plant powder and a polymer flocculant.
• purification of water refers to removing industrial wastewater, particularly inorganic industrial wastewater, and removing unnecessary substances such as nickel, copper, and fluorine in the wastewater.
• inorganic unnecessary substances in the wastewater are agglomerated and separated by the water purification agent.
• the wastewater is purified.
• the plant is not particularly limited as long as it can agglomerate and separate unnecessary materials (nickel, copper, fluorine, etc.) in the wastewater.
• unnecessary materials nickel, copper, fluorine, etc.
• Nagase Hemp, Morohaya, Komatsuna Examples include trefoil, mizuna and spinach.
• long-bellied burlap (Chrysanthemum) and Moroheiya are preferable, and long-bellied burlap, which showed good results in the examples described below, can be used more preferably.
• any part of leaves, stems and roots can be used, but leaves can be used more preferably.
• the polymer flocculant is not particularly limited as long as it exhibits an effect of removing unnecessary substances (nickel, copper, fluorine, etc.) in the waste water, as in the case of the above-mentioned plant.
• polyacrylamide, polyacrylamide Partially hydrolyzed salts, sodium alginate, sodium polyacrylate, CMC (carboxymethylcellulose) sodium salt and the like can be mentioned.
• polyacrylamide can be preferably used.
• commercially available Flopan AN 905, Flopan AN 926, Flopan AN 956 (manufactured by SNF Corporation) and the like can be used.
• a water purification agent having a desired performance can be stably and repeatedly supplied in an automated purification device. it can.
• the present inventors have studied an automated system in a wastewater purification apparatus using a water purification agent made of plant powder.
• a water purification agent made of plant powder and a polymer flocculant is used, the following problems occur. I found it to happen.
• various water purification agents used for wastewater purification treatment are stored in an automatic feeder, then quantified by a quantifier, and a predetermined amount of water purification agent is supplied to the wastewater in the reaction tank. Is done.
• the water purification agent is solid, it is once dissolved in the dissolution tank before being sent to the reaction tank, and then sent to the reaction tank.
• the solid water purifier in the automatic feeder is quantified by a quantifier and charged into a dissolution tank, where it is stirred and dissolved with a predetermined amount of water, and then the dispersion is sent to the reaction tank and drained. To be served.
• the apparatus is preferably as compact as possible, and it is preferable that the number of automatic feeders used is small.
• the cleaning agent cannot be repeatedly weighed with high accuracy. Furthermore, since the plant powder has a particularly low bulk specific gravity value, when an attempt is made to quantify the water purifier containing the plant powder having such a small bulk specific gravity value in an automatic feeder, it is quantified to a constant mass. Since it is necessary to put a water purifier into the vessel, it takes time and electric power for quantification. There are many demerits in measuring a water purifier having a low bulk specific gravity with an automatic feeder.
• the present inventors have found an aspect of a water purifying agent that can be suitably used in an automated purifying apparatus that purifies water. That is, the present inventors have found that a water purification agent comprising a granulated product containing a mixture of plant powder and a polymer flocculant can solve the above problem.
• the water purification agent of the present invention is a granulated product, it has good fluidity and does not cause clogging in an automatic feeder or a quantifier, and can stably supply the quantified water purification agent to the dissolution tank. it can.
• the water purification agent of the present invention granulates the plant powder and the polymer flocculant at a desired ratio, the water purification effect as expected can be obtained.
• the mixture of the plant powder and the polymer flocculant is granulated, the water purification agent of the present invention has a high value of the bulk specific gravity to a certain extent, and there is little variation in the value of the bulk specific gravity. It has become.
• the water purification agent of the present invention Since there is little variation in the value of the bulk specific gravity of the water purification agent, a water purification agent with little unevenness in the water purification performance can be obtained even when the determination is repeated.
• the water purification agent of the present invention is used in an automated purification device, it is possible to solve the problem caused by the difference in specific gravity between the plant powder and the polymer flocculant, and the plant powder and the polymer flocculant are contained in a desired blending ratio.
• the water purification agent thus obtained can be repeatedly weighed with high accuracy.
• the value of the bulk specific gravity of the water purifying agent of the present invention is considerably higher than the value of the bulk specific gravity of the water purifying agent obtained by simply mixing the plant powder and the polymer flocculant (described later). This is shown by the results of Examples 1 to 3 compared with Comparative Examples 1 to 3), which reduces the time and power required for quantification, and can be applied to an automated purification apparatus. Is effectively planned.
• the content ratio of the plant powder to the polymer flocculant in the water purification agent is preferably 1/1 to 9/1 in terms of mass ratio (plant powder / polymer flocculant).
• the content ratio of the plant powder in the water purification agent is preferably 1/1 or more in terms of mass ratio (plant powder / polymer flocculant).
• the mass ratio (plant powder / polymer flocculant) is preferably 9/1 or less.
• the diameter of the granulated product is more preferably 1 mm or less and the length is preferably 1 mm or less.
• the bulk specific gravity of the water purifier is preferably 0.4 g / cm 3 or more.
• the bulk specific gravity of the water purifier is 0.4 g / cm 3 or more, the time and power required for quantification can be suppressed, and the application to the automated purifier is effective. Can be aimed at.
• the bulk specific gravity can be determined as follows.
• the bulk specific gravity can be measured using a powder tester PT-N type (manufactured by Hosokawa Micron). Gently place a 100 cc sample in a 100 cc stainless steel cup, measure the specific gravity of the sample at that time, and obtain the bulk specific gravity.
• the variation of the bulk specific gravity of the water purifier (the ratio of the difference between the maximum value and the minimum value of the bulk specific gravity with respect to the minimum value of the bulk specific gravity) is preferably 4.5% or less.
• the variation in the bulk specific gravity of the water purifier is 4.5% or less, the water purifier having no unevenness in the water purifying performance with less variation in the blending ratio is repeated. It can be supplied with high accuracy and can be effectively applied to an automated purification apparatus.
• the variation in the bulk specific gravity can be obtained as follows.
• a water purification agent as a measurement sample is put into a bag of a certain size (for example, a 700 mm ⁇ 500 mm plastic bag), and the mouth of the bag is heat sealed. At that time, in the next vibration operation, the amount of the water purifying agent to be put in the bag is taken into consideration so as to secure a space where the water purifying agent can freely move. Next, the water purifier contained in the bag is vibrated up and down to such an extent that the granulated material does not collapse, and then samples are taken out from five points including the upper and lower portions of the bag, and the bulk specific gravity is measured. The maximum and minimum values of bulk specific gravity are recorded, and the variation is obtained by the following calculation based on the maximum and minimum values. (Difference between maximum and minimum bulk specific gravity / minimum bulk specific gravity) x 100
• the water purification agent is a plant powder production process for pulverizing a dried plant to obtain a plant powder having a number average particle size of 250 ⁇ m or less, mixing a polymer flocculant with the plant powder, adding water, kneading, and extruding. It is manufactured by a manufacturing method including a granulation step of obtaining a granulated product by granulation.
• the dried plant is pulverized using, for example, an atomizer (hammer mill, manufactured by Dalton) so that the number average particle diameter is 250 ⁇ m or less.
• the number average particle diameter can be measured using, for example, Morphologi G3 (manufactured by Malvern).
• a polymer flocculant is prepared.
• the size of the polymer flocculant may be equal to or smaller than the size of the granulated product, and can be used as it is if a commercially available product is smaller than the size of the granulated product.
• the size is larger than the size of the granulated product, for example, it may be pulverized to a desired size using an atomizer (hammer mill, manufactured by Dalton).
• the amount of water added is preferably 15% by mass to 250% by mass of water with respect to the total mass of the plant powder and the polymer flocculant, for example.
• a guideline for adding water to the mixture it is preferable that when the mixture to which water is added is held by hand, the shape remains without being easily dissolved.
• the amount of water added since the polymer flocculant absorbs a lot of water, the higher the mixing ratio of the polymer flocculant, the larger the amount of water added.
• the mass ratio (plant powder / polymer
• the mass ratio 15% by weight of water is added to the total weight of the mixture, and for a mixture mixed at 3/1, 20% by weight of water. And 82% by weight of water is added to the mixture mixed at 1/1.
• a commercially available granulating apparatus can be used, For example, an extrusion-type granulator (Dalton disk pelleter) is mentioned. After kneading, the kneaded product is extruded with a granulator to obtain a granulated product.
• the diameter of the granulated product is preferably 3 mm or less.
• the granulated product is dried with a fluidized bed dryer until the water content becomes 5% or less. Then, it is trimmed so that it may become predetermined length (preferably length of 2 mm or less) with a power mill P3 type crusher (made by Showa Chemical Machine Works). In this way, a water purification agent comprising a granulated product obtained by mixing the plant powder of the present invention and the polymer flocculant is obtained.
• Water purification method In the water purification method of the present invention, the above-described water purification agent of the present invention is dissolved in water to obtain a dispersion of plant powder and a polymer flocculant, and the dispersion is used for drainage, so that an inorganic system in the wastewater is unnecessary. This is a method for removing objects.
• the water purifier is quantified by a quantifier and then supplied to a dissolution tank. Then, the dispersion liquid of the water purifier obtained by being dissolved in a predetermined amount of water is sent to the reaction tank and used for drainage.
• inorganic unnecessary substances for example, nickel, copper, fluorine, etc.
• the waste water is purified.
• the bulk specific gravity was measured using a powder tester PT-N type (manufactured by Hosokawa Micron Corporation). A 100 cc sample was gently put into a 100 cc stainless cup, and the specific gravity of the sample at that time was measured to obtain a bulk specific gravity. [Variation of bulk specific gravity] The water purification agent as a measurement sample was put in a 700 mm ⁇ 500 mm plastic bag, and the bag mouth was heat-sealed. Next, the water purifier contained in the bag was vibrated up and down, and then samples were taken out from five points including the upper and lower portions of the bag, and each bulk specific gravity was measured. The maximum value and the minimum value of the bulk specific gravity were recorded, and the variation was obtained by the following calculation based on the maximum value and the minimum value. (Difference between maximum and minimum bulk specific gravity / minimum bulk specific gravity) x 100
• Example 1 Chinese oak burlap was dried by sun drying until the water content was 5% or less. Next, the dried plant was pulverized with an atomizer (hammer mill, manufactured by Dalton Co.) until the number average particle size became 250 ⁇ m or less to obtain a plant powder.
• an atomizer hammer mill, manufactured by Dalton Co.
• polyacrylamide powder (Flopan AN 956, manufactured by SNF Co., Ltd.) was used as the polymer flocculant.
• Plant powder The polymer flocculant is mixed so that the mass ratio (plant powder / polymer flocculant) is 1/1, and the mixing ratio of the plant flocculant is water with respect to the total mass of the mixture.
• the kneaded product was extruded and granulated using an extrusion granulator (Dalton disk pelleter).
• the granule having a diameter of about 2 mm was obtained by setting the die size ( ⁇ ) of the granulator to 2 mm.
• This granulated product was dried to a water content of 5% or less with a fluidized bed dryer, and then the length (L) was cut off with a power mill P3 type crusher at about 2 mm to obtain a granulated product 1.
• Example 2 In Example 1, the plant powder and the polymer flocculant were mixed so that the mass ratio (plant powder / polymer flocculant) of the mixture ratio of plant powder: polymer flocculant was 3/1.
• a water purifier was obtained in the same manner as in Example 1 except that 20% by mass of water was added to the total mass and kneaded.
• the bulk specific gravity value maximum value, minimum value
• the variation in bulk specific gravity were determined, and the effectiveness of application to an automatic feeder was also evaluated. The results are shown in Table 1.
• Example 3 In Example 1, the plant powder and the polymer flocculant were mixed so that the mass ratio (plant powder / polymer flocculant) of the mixture ratio of plant powder: polymer flocculant was 9/1.
• a water purifier was obtained in the same manner as in Example 1 except that 15% by mass of water was added to the total mass and kneaded.
• the bulk specific gravity value maximum value, minimum value
• the variation in bulk specific gravity were determined, and the effectiveness of application to an automatic feeder was also evaluated. The results are shown in Table 1.
• Comparative Example 1 Using the plant powder and the polymer flocculant of Example 1, the plant powder and the polymer flocculant were mixed so that the mass ratio (plant powder / polymer flocculant) was 1/1. A non-granulated water purification agent mixed with a flocculant was used as Comparative Example 1. In the same manner as in Example 1, the bulk specific gravity value (maximum value, minimum value) and the variation in bulk specific gravity were determined, and the effectiveness of application to an automatic feeder was also evaluated. The results are shown in Table 1.
• Comparative Example 2 In Comparative Example 1, a non-granulated product was obtained in the same manner as in Comparative Example 1, except that the mixing ratio of plant powder: polymer flocculant was 3/1 (mass powder / polymer flocculant). Water purifier was obtained. In the same manner as in Example 1, the bulk specific gravity value (maximum value, minimum value) and the variation in bulk specific gravity were determined, and the effectiveness of application to an automatic feeder was also evaluated. The results are shown in Table 1.
• Comparative Example 3 In Comparative Example 1, a non-granulated product was obtained in the same manner as in Comparative Example 1 except that the mixing ratio of plant powder: polymer flocculant was 9/1 (mass powder / polymer flocculant). Water purifier was obtained. In the same manner as in Example 1, the bulk specific gravity value (maximum value, minimum value) and the variation in bulk specific gravity were determined, and the effectiveness of application to an automatic feeder was also evaluated. The results are shown in Table 1.
• the water purifier of the present invention comprising a granulated product of a mixture of plant powder and polymer flocculant has a high bulk specific gravity value and a small variation in bulk specific gravity value.
• the bulk specific gravity of the powder of Nagatoro burlap is 0.15 g / cm 3
• the bulk specific gravity of the polymer flocculant is 0.75 g / cm 3 .
• Bulk density of these mixtures as shown in Comparative Examples 1 to 3, 0.18g / cm 3 ⁇ 0.33g / cm 3 order.
• the water purifier of the present invention is a granulated product of these mixtures, the bulk specific gravity value can be increased several stages.
• the water purification performance of the water purification agents of the examples was evaluated by a method of coagulating and precipitating nickel ions from an acidic solution in which 20 ppm of nickel ions were dissolved. First, 50 ppm of ferric chloride was added while stirring the solution at 150 rpm using a jar tester, and then sodium hydroxide was added to adjust the pH to 9 to 10 to perform primary aggregation. Next, water consisting only of the water purifying agent of Example 1 and the water purifying agent of Comparative Example 1 as the secondary agglomeration and the polymer flocculant used in Example 1 (Flopan AN 956 manufactured by SNF Corporation).
• Comparative Example 4 Using a purifying agent (referred to as Comparative Example 4), 10 ppm each was added, and the rotational speed was 50 rpm, followed by stirring for 2 minutes. Supernatant water 1 minute after the stirring was stopped was collected, and the nickel concentration was measured with Lambda ( ⁇ ) 9000 (manufactured by Kyoritsu Riken). The results are shown in Table 2.

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• Life Sciences & Earth Sciences (AREA)
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• Environmental & Geological Engineering (AREA)
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• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Separation Of Suspended Particles By Flocculating Agents (AREA)

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• 2014
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