WO2010109556A1 - Procédé et système de traitement de l'eau - Google Patents

Procédé et système de traitement de l'eau Download PDF

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Publication number
WO2010109556A1
WO2010109556A1 PCT/JP2009/005279 JP2009005279W WO2010109556A1 WO 2010109556 A1 WO2010109556 A1 WO 2010109556A1 JP 2009005279 W JP2009005279 W JP 2009005279W WO 2010109556 A1 WO2010109556 A1 WO 2010109556A1
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Prior art keywords
water
treated
water treatment
manganese
cod
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PCT/JP2009/005279
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English (en)
Japanese (ja)
Inventor
比留間敏和
木山龍均
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株式会社アサカ理研
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Publication of WO2010109556A1 publication Critical patent/WO2010109556A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
    • 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
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
    • 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
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • 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
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
    • 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
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • 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
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents

Definitions

  • the present invention relates to a water treatment method and a water treatment system, and more particularly to a water treatment method and a water treatment system for removing COD (Chemical Oxygen Demand).
  • COD Chemical Oxygen Demand
  • COD generally used as an indicator of water quality is the amount of oxygen required to oxidize the amount of oxidizable substances in water. COD is also used as a reference value for waste water discharged from, for example, factories. From the viewpoint of environmental protection, total COD regulations are becoming stricter year by year.
  • a flocculant such as aluminum sulfate, PAC, ferric chloride, ferric sulfate, polyferric sulfate or the like is added, and a filtration device or a sedimentation separation device is used.
  • a coagulation separation method to separate.
  • the coagulation separation method has a low COD removal rate, and it is difficult to meet the COD total amount regulations in recent years.
  • activated carbon may be difficult to be adsorbed depending on the type of organic substance (for example, a substance having a strong polarity, a substance having a large molecular structure, etc.), and the removal rate is not sufficient.
  • the COD removal rate is not sufficient with the conventional method, and it is becoming difficult to meet the recent COD emission regulations.
  • an object of the present invention is to provide a water treatment method and a water treatment system capable of solving the conventional problems and removing COD with a high removal rate.
  • the water treatment method and the water treatment system according to the present invention have been realized based on a novel concept that has not been achieved in the past, in which COD is removed by using a manganese-based filter material, as a result of earnest research by the present inventors.
  • Manganese-based filter media have been developed as filter media for removing manganese from water containing manganese as an impurity.
  • the present inventors have realized a novel water treatment method and water treatment system in which COD is removed using a manganese-based filter medium. .
  • the water treatment method of the present invention is a water treatment method for removing COD (Chemical Oxygen Demand), adding a chlorine-based oxidizing agent to water to be treated containing organic matter, passing the water through a manganese-based filter medium, and organic matter. COD is removed by catalytic oxidative decomposition.
  • COD Chemical Oxygen Demand
  • chlorine-based oxidizing agent a general chlorine-based oxidizing agent can be used. Among them, chlorine dioxide (ClO 2 ) is most effective for removing COD.
  • the manganese-based filter medium is preferably a filter medium in which a manganese dioxide (MnO 2 ) crystal is supported on a particulate base material and has the following characteristics.
  • the water treatment method may further have a step of adsorbing and removing organic matter by passing the water to be treated after the catalytic oxidative decomposition through activated carbon, for example, when the COD regulation value is low (that is, when regulation is severe). Further, for example, when the SS concentration is high, a step of adding a flocculant to the water to be treated before passing through the manganese-based filter medium and separating and removing suspended components can be further included.
  • the water treatment system of the present invention is a water treatment system for removing COD (Chemical Oxygen Demand), wherein means for adding a chlorine-based oxidant to water to be treated containing organic matter, and the chlorine-based oxidant includes And a filtering device including a manganese-based filtering material that allows the added water to be treated to flow therethrough.
  • COD Chemical Oxygen Demand
  • the water treatment system may further include an adsorption device including activated carbon that passes the water to be treated after passing through the manganese-based filter material when, for example, the COD regulation value is low (that is, when regulation is severe). .
  • an adsorption device including activated carbon that passes the water to be treated after passing through the manganese-based filter material when, for example, the COD regulation value is low (that is, when regulation is severe).
  • the SS concentration before passing through the manganese-based filter material, means for adding a flocculant to the water to be treated and other filtration for passing the water to be treated to which the flocculant is added And a device.
  • the organic substance can be catalytically oxidatively decomposed to remove COD. Furthermore, by passing water through activated carbon after catalytic oxidative decomposition, it is possible to adsorb the organic components subjected to catalytic oxidative decomposition and reliably remove COD. Further, by removing suspended substances by the coagulation separation method before passing the water through the manganese-based filter medium, the contact oxidizing power of the manganese-based filter medium can be prevented from being lowered and COD can be reliably removed. It becomes possible.
  • FIG. 1 shows an example of a water treatment system 1 according to a preferred embodiment of the present invention.
  • a water treatment system 1 according to the present embodiment includes a raw water tank 2 that stores organic matter-containing water (raw water) that is water to be treated, means 3 for adding a flocculant to the water to be treated, First filtration device 4 for separating suspended substances from treated water, means 5 for supplying a chlorine-based oxidizing agent to treated water, and manganese for catalytic oxidative decomposition of organic substances contained in treated water
  • a second filtering device 6 having a system filter medium and an adsorption device 7 having activated carbon for adsorbing organic substances contained in the water to be treated are provided.
  • Reference numerals 21, 22, and 23 in the figure are pumps for transferring the water to be treated between the apparatuses.
  • the water treatment system 1 includes a tank 8 for storing water to be treated after being treated by the second filtration device 6.
  • a part of the water to be treated stored in the tank 8 is a first liquid that has temporarily stopped water flow as a cleaning liquid for cleaning (so-called backwashing) the filtering material of the first and second filtering devices 4 and 6
  • cleaning supplied to the 2nd filtration apparatuses 4 and 6 is a structure returned to an upstream installation as original raw water.
  • the return destination of the washing wastewater may be the raw water tank 2.
  • the first filtering device 4 has a main role of filtering and separating suspended substances in the water to be treated to which the flocculant is added by the flocculant adding means 3.
  • the first filtration device 4 has a filtration layer through which water flows in the order of anthracite 41, sand (filter material) 42, and filtration gravel 43.
  • the water flow method may be a gravity method or a pressurization method using a pump or the like.
  • anthracite 41 for example, an effective diameter of 1.2 mm and a uniformity coefficient of 1.4 or less can be used.
  • As the sand (filter material) 42 for example, an effective diameter of 0.6 mm and a uniformity coefficient of 1.4 or less can be used.
  • the filter gravel 43 serves as a support layer for the anthracite 41 and the sand (filter material) 42, and has a role for performing water flow and backwashing equally.
  • the filtration gravel 43 can be replaced by a support member having a plurality of water holes or slits.
  • the second filtering device 6 has a main role of catalytically oxidizing and decomposing organic matter in the water to be treated to which the chlorinated oxidant is added by the oxidant adding means 5.
  • the second filtration device 6 has a filtration layer through which water flows in the order of anthracite 61, manganese-based filter material 62, and filtration gravel 63.
  • the water flow method may be a gravity method or a pressurization method using a pump or the like.
  • anthracite 61 for example, an effective diameter of 0.8 mm and a uniformity coefficient of 1.4 or less can be used.
  • the anthracite 61 is provided to prevent suspended substances that could not be removed by the first filtration device 4 from adhering to the manganese-based filter material 62 and inhibiting the contact oxidation.
  • the filtration gravel 63 has the same role as the filtration gravel 43 described above.
  • the manganese-based filter medium 62 can be a filter medium in which a manganese dioxide (MnO 2 ) crystal is supported on a particulate base material, and more preferably a filter medium having the characteristics shown in the following table. is there.
  • SiO 2 is preferably 72.0%
  • Al 2 O 3 is 16.0%
  • MnO 2 is 3.0%
  • K 2 O is 3.0%
  • Na 2 O is 2.0%
  • Others for example, impurities
  • the adsorption device 7 mainly serves to adsorb organic substances contained in the water to be treated.
  • the adsorption device 7 has an activated carbon layer 71 formed of, for example, particulate activated carbon.
  • activated carbon product: ACW8-32 #
  • Serachem Co., Ltd. can be used.
  • the type and shape of the activated carbon are not limited, and any known activated carbon can be used.
  • the flocculant addition means 3 and the oxidant addition means 5 connect flow paths (for example, pipes) 31 and 51 communicating with respective supply sources (not shown) to the flow path of the water to be treated.
  • a chlorine-based oxidizing agent is configured to be added to the water to be treated.
  • the addition amount can be adjusted by the flow rate adjusting means 32, 52 such as a valve.
  • a stirring device such as a line mixer or a stirring tank may be installed.
  • the supply place shown in FIG. 1 is an example, and is not limited to this position.
  • the flocculant may be added at least before the supply to the first filtration device 4, and the oxidizing agent may be added at least before the supply to the second filtration device 6.
  • the addition position of the flocculant is not limited to one, and in order to effectively remove residual turbidity by the anthracite 61 of the second filtration device 6, the first filtration device 4 and the second filtration device 6 A flocculant addition means for adding a flocculant between the two may be newly added.
  • the flocculant examples include inorganic flocculants such as PAC (chemical name: polyaluminum chloride), polyiron (chemical name: polyferric sulfate), sulfate band (chemical name: aluminum sulfate), and polyacrylamide organic flocculants. Agents can be used. Among them, PAC is preferable.
  • the flocculant is added mainly for the purpose of aggregating suspended substances in the water to be treated. The aggregated suspended solids are filtered and separated to lower the TOC (Total Organic Carbon) of the water to be treated and the suspended solids adhere to the manganese-based filter medium 62 to inhibit contact oxidation. To prevent it.
  • TOC Total Organic Carbon
  • chlorine-based oxidizing agent for example, chlorine dioxide (ClO 2 ), hypochlorite such as sodium hypochlorite (NaClO), or potassium permanganate (KMnO 4 ) can be used.
  • the chlorine-based oxidant is added mainly for the purpose of oxidatively decomposing organic substances using the manganese-based filter material 61 as a catalyst.
  • chlorine dioxide (ClO 2 ) is particularly preferable as an oxidizing agent that performs oxidative decomposition of organic matter using the manganese-based filter material 61.
  • the type and quality of treated water (raw water) treated by this system is not particularly limited, and covers various organic matter-containing waters such as general wastewater, industrial wastewater, sewage, river water, groundwater, and lake water. It can be.
  • the raw water treated in the examples described later had a chromaticity of 14.1, a turbidity of 14.11, and a pH of 7.65.
  • pH adjustment can be performed suitably as a pretreatment.
  • the treated water (raw water) to be treated by this system is temporarily stored in the raw water tank 2 and transferred toward the first filtration device 4 by the pump 21, and the flocculant is added by the flocculant adding means 3. Added.
  • the addition amount of the flocculant is set to 5 to 30 mg / l, for example.
  • the water to be treated to which the flocculant is added is supplied to the first filtration device 4, and the suspended substances are separated and removed when passing through the filter medium.
  • the water to be treated (separated liquid) from which the suspended substances have been separated by the first filtration device 4 is added with a chlorine-based oxidizing agent by the oxidizing agent adding means 5.
  • the addition amount of the oxidizing agent is set to, for example, 1.25 mg / l for chlorine dioxide (ClO 2 ) and 5 mg / l for sodium hypochlorite (NaClO).
  • the water to be treated to which the oxidizing agent is added is supplied to the second filtration device 6, and when passing through the manganese-based filter material 61, the organic matter is oxidized and decomposed by chlorine dioxide using the manganese-based filter material 61 as a catalyst. .
  • the water to be treated in which the organic matter is oxidized and decomposed by the second filtration device 6, is temporarily stored in the tank 8 and supplied to the adsorption device 7 by the pump 23. And when passing through the activated carbon layer 71 of the adsorption device 7, the organic matter is adsorbed on the activated carbon.
  • the water to be treated from which COD has been removed in this way is sufficient COD to be discharged, as is apparent from the results of Examples described later.
  • a chlorine-based oxidant is added to water to be treated containing organic matter, and this is passed through the manganese-based filter material 62, whereby the organic matter is catalytically oxidized and decomposed to produce COD. Can be removed.
  • the water to be treated through activated carbon after the catalytic oxidative decomposition by passing the water to be treated through activated carbon after the catalytic oxidative decomposition, it is possible to adsorb the organic components subjected to the catalytic oxidative decomposition and reliably remove COD.
  • it may be difficult to adsorb depending on the type of organic substance for example, a substance with a strong polarity, a substance with a large molecular structure, etc.
  • the COD removal rate by the activated carbon can be improved.
  • the suspended solids are removed by the coagulation separation method, thereby preventing the contact oxidizing power of the manganese-based filter media 62 from being reduced.
  • COD can be reliably removed.
  • Example 1 raw water is treated according to the flow shown in FIG.
  • the main test conditions are shown below.
  • the raw water, the first filtration treatment, the catalytic oxidation separation, and the water to be treated after the adsorption treatment with activated carbon were sampled, and the chromaticity, turbidity, and COD were measured.
  • Table 3 shows the measurement results.
  • the sulfuric acid acidic potassium permanganate method was employ
  • Example 2 This example is Example 2 in which hypochlorous acid was added as an oxidizing agent in place of the chlorine dioxide of Example 1. Other conditions are the same as in Example 1 except that the type of the oxidizing agent is changed. Table 4 shows the chromaticity, turbidity, and COD measurement results of each sampling.
  • This comparative example is a comparative example 1 similar to the example 1 except that the catalytic oxidation was not performed. That is, the flow shown in FIG. 1 is a comparative example in which the second filtration device is omitted and the treated water subjected to the first filtration treatment is passed through activated carbon. Table 5 shows the chromaticity, turbidity, and COD measurement results of each sampling.

Abstract

La présente invention concerne un procédé et un système de traitement de l'eau grâce auxquels la DBO (Demande biochimique en Oxygène) peut être éliminée avec une vitesse d'élimination élevée. Il est possible d'éliminer la DBO avec une vitesse d'élimination élevée au moyen d'une structure dans laquelle un oxydant chloré est ajouté à l'eau qui contient de la matière organique et qui doit être traitée par élimination de la DBO ; l'eau est ensuite transférée à travers un matériau de filtre à base de manganèse (62) ; et la matière organique est décomposée par oxydation catalytique. Il est également possible d'utiliser une structure grâce à laquelle, après décomposition par oxydation catalytique dans ce cas, l'eau est transférée à travers un dispositif d'adsorption (7) contenant du charbon actif (71). Il est en outre possible d'utiliser une structure grâce à laquelle un coagulant est ajouté avant que l'eau ne soit transférée à travers le matériau de filtre à base de manganèse (62) et la matière en suspension est éliminée par un dispositif de filtration (4).
PCT/JP2009/005279 2009-03-24 2009-10-09 Procédé et système de traitement de l'eau WO2010109556A1 (fr)

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JP2009-072124 2009-03-24

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PCT/JP2010/002000 WO2010109838A1 (fr) 2009-03-24 2010-03-19 Procédé et système de traitement de l'eau

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JP (1) JP4786771B2 (fr)
KR (1) KR101426925B1 (fr)
CN (1) CN102361826B (fr)
MY (1) MY155401A (fr)
SG (1) SG174377A1 (fr)
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CN105217769A (zh) * 2014-06-10 2016-01-06 成都润兴消毒药业有限公司 能杀灭粪大肠菌群、降低cod的污水处理剂及制备方法
WO2016092620A1 (fr) * 2014-12-08 2016-06-16 三菱重工業株式会社 Appareil de traitement d'eau
JP2019034288A (ja) * 2017-08-18 2019-03-07 株式会社テクノササヤ 水処理装置
WO2022120432A1 (fr) * 2020-12-10 2022-06-16 Infinite Water Technologies Pty Ltd Procédé de traitement des eaux
CN115353256A (zh) * 2022-08-22 2022-11-18 山东华城工程技术有限公司 一种微污染地表水源水净水处理工艺

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WO2014017500A1 (fr) * 2012-07-24 2014-01-30 ダイキン工業株式会社 Procédé de traitement d'une solution aqueuse contenant des ions d'acide phosphorique
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JP2014094335A (ja) * 2012-11-08 2014-05-22 Mitsubishi Rayon Co Ltd 有機物含有水の処理方法及び処理システム
CN105217769A (zh) * 2014-06-10 2016-01-06 成都润兴消毒药业有限公司 能杀灭粪大肠菌群、降低cod的污水处理剂及制备方法
WO2016092620A1 (fr) * 2014-12-08 2016-06-16 三菱重工業株式会社 Appareil de traitement d'eau
JPWO2016092620A1 (ja) * 2014-12-08 2017-08-03 三菱重工業株式会社 水処理装置
JP2019034288A (ja) * 2017-08-18 2019-03-07 株式会社テクノササヤ 水処理装置
WO2022120432A1 (fr) * 2020-12-10 2022-06-16 Infinite Water Technologies Pty Ltd Procédé de traitement des eaux
GB2616218A (en) * 2020-12-10 2023-08-30 Infinite Water Tech Pty Ltd Process for treating water
CN115353256A (zh) * 2022-08-22 2022-11-18 山东华城工程技术有限公司 一种微污染地表水源水净水处理工艺
CN115353256B (zh) * 2022-08-22 2024-04-16 山东华城工程技术有限公司 一种微污染地表水源水净水处理工艺

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CN102361826A (zh) 2012-02-22
WO2010109838A1 (fr) 2010-09-30
KR101426925B1 (ko) 2014-08-05
SG174377A1 (en) 2011-10-28
MY155401A (en) 2015-10-15

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