JP4761447B2 - Method and apparatus for treating manganese-containing water - Google Patents

Description

  The present invention relates to a method and an apparatus for treating water containing soluble manganese, and in particular, in water purification, industrial water treatment, sewage treatment, wastewater treatment, oxidation of soluble manganese and removal of oxidized manganese. The present invention relates to a water treatment method and apparatus.

  Separation of a flocculant tank equipped with a stirrer, a floc forming tank equipped with a stirrer, a sedimentation tank, a means for pulling out the sediment from the bottom of the sedimentation tank, and a cyclone for separating the pulled sediment by specific gravity and particle size In the coagulation sedimentation apparatus equipped with the means, an oxidizing agent, an acid or alkali for pH adjustment, an inorganic coagulant are added to the water to be treated in the coagulation tank, and the organic polymer coagulant and the settling accelerator are added in the floc formation tank. , The suspended matter in the water to be treated and the sedimentation accelerator are aggregated, separated by precipitation in a sedimentation tank, and the aggregated and settled precipitate is separated into sludge and sedimentation promoter by a separating means such as a cyclone. Thereafter, a coagulation sedimentation apparatus is known in which a sedimentation accelerator is transported to a coagulation tank and reused (for example, Patent Documents 1 and 2). In such a coagulating sedimentation apparatus, as the oxidizing agent, for example, sodium hypochlorite, chlorine dioxide, permanganic acid or the like is used, and as the acid or alkali for pH adjustment, for example, sulfuric acid, hydrochloric acid, hydroxide Sodium, slaked lime, soda ash and the like are used, and as the aggregating agent, for example, polyaluminum chloride (hereinafter sometimes abbreviated as PAC), sulfate band, ferric sulfate, ferric chloride and the like are used. As the settling accelerator, granular materials (silica sand) mainly composed of silicon dioxide are used.

By the way, the reason why the oxidizing agent is added to the water to be treated is that the soluble metals such as iron and manganese are changed to oxides and can be removed by coagulation precipitation or filtration treatment. Further, when a chlorinating agent is used as the oxidizing agent, there are also purposes such as decomposition of organic substances, sterilization, and algaecidal. Moreover, as a method for removing soluble iron and manganese, there is also a method by filtration in which a chlorine agent is added to the water to be treated and the water is passed through a manganese sand filtration device.
JP 2000-334209 A JP 2004-267855 A

  The soluble manganese contained in the water to be treated cannot be completely oxidized by the chlorinating agent alone, so use potassium permanganate or both chlorinating agent and potassium permanganate to make manganese insoluble. There is a case where a treatment to form an oxide is performed. If the pH of the water to be treated is 10 or more, manganese can be oxidized with chlorine alone. However, if a large amount of alkali is used to raise the pH, the pH of the water to be treated is usually in terms of drainage standards. Therefore, it is necessary to add acid such as sulfuric acid and hydrochloric acid, which is disadvantageous in terms of economy.

  In addition, if potassium permanganate is used, it is easy to oxidize soluble manganese, but potassium permanganate needs to dissolve the powder and it is difficult to control the injection rate. Absent. When combined with a chlorinating agent, the injection rate can be controlled somewhat easily, but the problem that two types of drugs must always be used remains.

  Furthermore, in the case of the filtration method using manganese sand, manganese can be oxidized and removed using only a chlorine agent. However, if the water to be treated contains a high concentration of turbidity or iron, it is oxidized in the previous stage. A coagulation sedimentation treatment including a treatment or a pressure levitation treatment is required, and the treatment system becomes large and complicated.

  Therefore, an object of the present invention is to oxidize and remove soluble manganese easily and efficiently by using a coagulation-precipitation treatment in which a settling accelerator is circulated and using only a chlorinating agent as an oxidizing agent. An object of the present invention is to provide a method and apparatus for treating manganese-containing water that can be made.

  In order to solve the above-mentioned problems, a method for treating manganese-containing water according to the present invention includes a flocculation tank equipped with a stirrer, a floc-forming tank equipped with a stirrer, a precipitation tank, and a puller that draws sediment from the lower part of the precipitation tank. And separation means for separating the extracted sediment into sludge and sedimentation promoter (for example, a cyclone that separates the sediment by specific gravity and particle size), and chlorine is added to the treated water containing manganese in the coagulation tank. Add a coagulant and an inorganic flocculant, add a polymer flocculant and a sedimentation accelerator in the floc forming tank, agglomerate the suspended matter in the water to be treated and the sedimentation accelerator, and separate the precipitate in the sedimentation tank. In addition, after separating the coagulated sediment into sludge and sedimentation promoting material by a separation means, the sedimentation promoting material is transported to a floc forming tank and reused by using a coagulation sedimentation apparatus that treats manganese-containing water. And sedimentation promoter And it comprises a method which comprises using a particulate material containing manganese oxide.

  Further, another method for treating manganese-containing water according to the present invention comprises a coagulation tank equipped with a stirrer, a floc-forming tank equipped with a stirrer, a precipitation tank, a drawing means for pulling out the precipitate from the lower part of the precipitation tank, and a drawing means. And separating means for separating the sediment into sludge and a settling accelerator, and adding a chlorine agent, an inorganic flocculant and a settling accelerator to the water to be treated containing manganese in the coagulation tank, A polymer flocculant is added to agglomerate suspended substances in the water to be treated and the settling accelerator, and the precipitate is separated in a sedimentation tank. A method of treating manganese-containing water using a coagulation sedimentation apparatus that transports and reuses a settling accelerator after being separated into a coagulation tank, wherein a particulate matter containing manganese oxide is used as the settling accelerator. It consists of the method.

  Furthermore, another method for treating manganese-containing water according to the present invention comprises a mixing tank equipped with a stirrer, a coagulation tank equipped with a stirrer, a floc forming tank equipped with a stirrer, a precipitation tank, and a lower part of the precipitation tank. It is equipped with a drawing means for pulling out the precipitate and a separating means for separating the drawn precipitate into sludge and a settling accelerator, and adding a chlorine agent and a settling accelerator to the treated water containing manganese in the mixing tank and agglomerating Add an inorganic flocculant in the tank, add a polymer flocculant in the floc forming tank, agglomerate the suspended matter in the water to be treated and the sedimentation accelerator, precipitate and separate in the sedimentation tank, and further agglomerate A method in which manganese-containing water is treated using a coagulation sedimentation apparatus in which a sedimentation precipitate is separated into sludge and a sedimentation accelerator by a separation means, and then the sedimentation accelerator is transported to a mixing tank and reused. Granules containing manganese oxide as a promoter It comprises a method which comprises using a.

  That is, the method for treating manganese-containing water according to the present invention is characterized in that a particulate matter containing manganese oxide is used as the sedimentation accelerator, although the addition and recovery positions of the sedimentation accelerator are different.

  As the particulate matter containing manganese oxide, a particulate matter covered with manganese oxide can be used, and as the particulate matter covered with manganese oxide, for example, so-called manganese sand is used. be able to. Or the granular material formed with manganese oxide itself can also be used as a granular material containing the said manganese oxide.

  Moreover, as a chlorine agent added to the said to-be-processed water, any of sodium hypochlorite, a liquefied chlorine solution, and chlorine dioxide can be used, for example.

  In addition, sodium hypochlorite is used as the chlorinating agent to be added to the water to be treated, and a means for measuring the free chlorine concentration in the treated water from the precipitation tank outlet (that is, a residual chlorine concentration meter) is provided. The injection rate of sodium hypochlorite can be controlled to be 0.1 to 1.0 mg / L.

  The manganese-containing water treatment apparatus according to the present invention comprises a flocculant tank equipped with a stirrer, a floc-forming tank equipped with a stirrer, a precipitation tank, a drawing means for pulling out the precipitate from the lower part of the precipitation tank, and the drawn precipitate as sludge. And a separation means for separating into a sedimentation accelerator, a chlorine agent and an inorganic flocculant are added to the water to be treated containing manganese in the coagulation tank, and the polymer flocculant and the sedimentation accelerator are added in the floc forming tank. Added, the suspended matter in the water to be treated and the sedimentation accelerator are aggregated, separated by precipitation in a sedimentation tank, and the aggregated and settled precipitate is separated into sludge and sedimentation accelerator by a separating means, and then settled. A device for treating manganese-containing water using a coagulation sedimentation device that transports and reuses a promoter to a floc forming tank, wherein the sedimentation promoter comprises a particulate matter containing manganese oxide. Become.

  Further, another manganese-containing water treatment apparatus according to the present invention comprises a coagulation tank equipped with a stirrer, a floc-forming tank equipped with a stirrer, a precipitation tank, a drawing means for drawing the precipitate from the bottom of the precipitation tank, and a drawing machine. And separating means for separating the sediment into sludge and a settling accelerator, and adding a chlorine agent, an inorganic flocculant and a settling accelerator to the water to be treated containing manganese in the coagulation tank, A polymer flocculant is added to agglomerate suspended substances in the water to be treated and the settling accelerator, and the precipitate is separated in a sedimentation tank. An apparatus for treating manganese-containing water using a coagulation sedimentation apparatus that transports and reuses a settling accelerator to a coagulation tank after separation, wherein the settling accelerator consists of particulate matter containing manganese oxide It consists of a device.

  Furthermore, another manganese-containing water treatment apparatus according to the present invention includes a mixing tank equipped with a stirrer, a flocculant tank equipped with a stirrer, a floc forming tank equipped with a stirrer, a precipitation tank, and a lower part of the precipitation tank. It is equipped with a drawing means for pulling out the precipitate and a separating means for separating the drawn precipitate into sludge and a settling accelerator, and adding a chlorine agent and a settling accelerator to the treated water containing manganese in the mixing tank and agglomerating Add an inorganic flocculant in the tank, add a polymer flocculant in the floc forming tank, agglomerate the suspended matter in the water to be treated and the sedimentation accelerator, precipitate and separate in the sedimentation tank, and further agglomerate An apparatus for treating manganese-containing water using a coagulating sedimentation apparatus that separates the sedimented sediment into sludge and sedimentation promoting material by a separating means, and then transports the sedimentation promoting material to a mixing tank for reuse. Is the accelerator a particulate material containing manganese oxide? It consists device according to claim made.

  That is, the manganese-containing water treatment apparatus according to the present invention is characterized in that, although the settling accelerators are added and recovered at different positions, the settling accelerators are made of particulate matter containing manganese oxide.

  The particulate matter containing manganese oxide can be composed of particulate matter covered with manganese oxide. Examples of the particulate matter covered with manganese oxide include so-called manganese sand and so on. can do. Or it can also be set as the structure which consists of a granular material formed with manganese oxide itself as a granular material containing the said manganese oxide.

  Moreover, the chlorine agent added to the said to-be-processed water can be either a sodium hypochlorite, a liquefied chlorine solution, and chlorine dioxide, for example.

  Further, the chlorine agent added to the water to be treated is composed of sodium hypochlorite, and has means for measuring the free chlorine concentration in the treated water from the precipitation tank outlet, and the value in the measuring means is 0.1 to A structure having means for controlling the injection rate of sodium hypochlorite so as to be 1.0 mg / L.

  In the method and apparatus for treating manganese-containing water according to the present invention, the particle size of the sedimentation accelerator made of particulate matter containing manganese oxide is not particularly limited, but an average particle size of 20 to 200 μm is treated. It is preferable from the aspect of the effect.

  According to the method and apparatus for treating manganese-containing water according to the present invention, when treating the water to be treated containing soluble manganese using the coagulation sedimentation treatment, the sedimentation accelerator made of particulate matter containing manganese oxide is used. This makes it possible to oxidize soluble manganese using only a chlorinating agent as an oxidizing agent and to remove the oxidized manganese. Therefore, it becomes possible to oxidize and remove soluble manganese easily and efficiently.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described based on examples with reference to the drawings.
In the water purification treatment using dam water as raw water, the coagulation sedimentation treatment and the oxidation and removal of iron and manganese in the present invention were performed as a pretreatment for the microfiltration (MF membrane filtration) treatment. When performing membrane filtration treatment, if raw metal (treated water) contains a soluble metal, especially manganese, it is oxidized on the membrane surface and clogs pores that allow water to penetrate (fouling). ). Therefore, it is desirable that the soluble metal be oxidized before membrane filtration, and if possible be removed after being converted into an oxide. In addition, although it was set as microfiltration here, it is possible to employ | adopt turbidity filtration methods, such as slow filtration, rapid filtration, and ultrafiltration.

  This raw water contains iron and manganese eluted from dam bottom mud in addition to suspended components (turbidity), chromaticity, and organic matter, and iron or manganese is removed after oxidation or after oxidation before performing microfiltration. (In particular, in the present invention, soluble manganese is to be removed). Therefore, soluble iron, manganese oxidation, oxidized iron and manganese were removed by the method and apparatus according to the present invention before the microfiltration. In the method and apparatus according to the present invention, turbidity, chromaticity, and organic contaminants can be removed at the same time by the coagulation sedimentation process, which is the original function.

  Specific embodiments of the method and apparatus according to the present invention are shown in FIGS. FIG. 1 shows the apparatus flow of Example 1, and the flow itself of FIG. 1 is the same as that of the conventional method, and the sedimentation accelerator used is ordinary silica sand (conventional method), or silica sand is coated with manganese oxide. The only difference is the manganese sand (Example 1). In Example 2 shown in FIG. 2, the addition position (return position) of the settling accelerator was changed from the flock formation tank to the aggregation tank. The sedimentation accelerator was manganese sand. In Example 3 shown in FIG. 3, the mixing tank was installed in the front | former stage of the coagulation tank, and the addition position (return position) of the sedimentation accelerator was used as the mixing tank. The sedimentation accelerator was manganese sand.

First, the apparatus configuration of Examples 1 to 3 shown in FIGS. 1 to 3 will be described.
In the manganese-containing water treatment apparatus 1 of Example 1 shown in FIG. 1, the coagulation sedimentation apparatus 2 includes a coagulation tank 4 provided with a stirrer 3, a flock formation tank 6 provided with a stirrer 5, and an upper part in the tank. A sedimentation tank 8 provided with an inclined plate 7; a sludge circulation pump 11 as an extraction means 10 for extracting the precipitate 9 from the lower part of the precipitation tank 8; and an extraction line 12 thereof; And a cyclone 13 as a separating means for separating them. Raw water 14 as water to be treated containing soluble manganese is introduced into the coagulation tank 4, and chlorine water 15 (sodium hypochlorite in the illustrated example) is added to the water to be treated containing manganese in the coagulation tank 4. Inorganic flocculant 16 (in the illustrated example, polyaluminum chloride [PAC]) is added through each pump 17, 18, and in floc forming tank 6, polymer flocculant 19 (in this example, Nonionic acrylamide polymer) is added via the pump 20, and the sedimentation promoting material 21 is added, and the suspended matter in the water to be treated and the sedimentation promoting material 21 are aggregated and separated in the sedimentation tank 8. Further, after the precipitate 9 that has been further agglomerated and precipitated is separated into the sludge 22 and the sedimentation promoting material 21 by the cyclone 13 as the separating means, the separated sedimentation promoting material 21 is transported to the floc forming tank 6 and reused. It is adapted to be. In the conventional method, silica sand was used as a sedimentation accelerator, but manganese sand was used in Example 1 of the present invention. Similarly in Examples 2 and 3, manganese sand was used as a sedimentation accelerator.

  In the manganese-containing water treatment apparatus 41 of Example 2 shown in FIG. 2, the addition position (return position) of the settling accelerator 21 is changed from the flock formation tank 6 to the aggregation tank 4, and the other configurations are substantially. It was the same as Example 1 shown in FIG. In the manganese-containing water treatment apparatus 51 of Example 3 shown in FIG. 3, a mixing tank 53 equipped with a stirrer 52 is installed in the preceding stage of the coagulation tank 4, and the addition position (return position) of the settling accelerator 21 is set in the mixing tank. 53. Other configurations are substantially the same as those of the first embodiment shown in FIG.

  In these apparatuses shown in FIGS. 1 to 3, the free chlorine concentration in the treated water 23 from the upper part (exit) of the settling tank 8 can be automatically measured by the residual chlorine concentration meter 24. Is introduced into the microfiltration device 26 through the filtration inlet valve 25 and filtered. The filtered treated water 27 is temporarily stored in a backwash water tank 29 via a treated water valve 28 and then sent to a predetermined destination as purified water 30. The purified water 30 stored in the backwash water tank 29 can be sent to the microfiltration device 26 by the pump 32 as backwash water 31, and the backwash drainage 33 after backwashing is the backwash drain valve 34. It is supposed to be discharged through.

The specifications and operating conditions of the above device are as follows.
・ Processed water volume: 9.5m ³ / h
・ Raw water turbidity: 3.7-4.5 degrees, average turbidity 4.0 degrees ・ Coagulation sedimentation equipment: Skid body dimensions: 2.3mW × 1.5mD × 3.4mH
Mixing tank: Installed only for the equipment shown in Fig. 3.
Coagulation tank: 0.44m ³ with stirrer
Flock formation tank: 0.50m ³ with stirrer
Sedimentation tank: 0.50m ³ (surface area 0.25m ² , 0.5m x 0.5m)
Sludge circulation rate: 0.5m ³ / h
・ Sludge concentration tank: 1m ³ (not shown)
・ Chlorine: Sodium hypochlorite, added so that the concentration of free chlorine in the treated water is 0.7 mg / L ・ Flocculant: PAC, injection rate 20-50 mg / L
・ Agglomeration aid: Nonionic acrylamide polymer, molecular weight 16 million,
Injection rate 0.2-0.5mg / L
・ Settling accelerator: Conventional method: Silica sand
Examples 1-3 of the present invention: Manganese sand

  Table 1 shows the manganese concentration and iron concentration in the treated water of the conventional method and Examples 1 to 3 of the present invention. The raw water is the concentration of soluble manganese and iron, and the other is the concentration of total manganese and total iron. As shown in Table 1, in any of Examples 1 to 3, it can be seen that the manganese and iron concentrations can be reduced as compared with the conventional method. For reference, tap water quality standards are 0.3 mg / L for iron and 0.05 mg / L for manganese.

  The method and apparatus for treating manganese-containing water according to the present invention can be applied to any water purification treatment, industrial water treatment, sewage treatment, wastewater treatment, etc. that require removal of soluble manganese.

It is an equipment distribution diagram of a processing device of manganese content water concerning Example 1 of the present invention. It is an equipment distribution diagram of a processing device of manganese content water concerning Example 2 of the present invention. It is an equipment distribution diagram of a processing device of manganese content water concerning Example 3 of the present invention.

Explanation of symbols

1, 41, 51 Manganese-containing water treatment apparatus 2 Coagulation sedimentation apparatus 3 Agitation machine 4 Coagulation tank 5 Agitation machine 6 Flock formation tank 7 Slope plate 8 Sedimentation tank 9 Precipitate 10 Extraction means 11 Sludge circulation pump 12 Extraction line 13 Separation means Cyclone 14 as raw water 15 as treated water 15 Sodium hypochlorite 16 as chlorinating agent Polyaluminum chloride (PAC) as inorganic flocculant
17, 18 and 20 Pump 19 Polymer 21 as polymer flocculant 22 Settling accelerator 22 Sludge 23 Treated water 24 Residual chlorine concentration meter 25 Filtration inlet valve 26 Microfiltration device 27 Filtered treated water 28 Treated water valve 29 Backwash water tank 30 Clean water 31 Backwash water 32 Pump 33 Backwash drainage 34 Backwash drainage valve 52 Stirrer 53 Mixing tank

Claims (16)

  A flocculation tank equipped with a stirrer, a floc forming tank equipped with a stirrer, a precipitation tank, a drawing means for pulling out the precipitate from the lower part of the settling tank, and a separating means for separating the drawn precipitate into sludge and a settling accelerator. In addition, a chlorine agent and an inorganic flocculant are added to the water to be treated containing manganese in the coagulation tank, a polymer flocculant and a settling accelerator are added in the floc forming tank, and suspended substances and sediment in the water to be treated The accelerating material is agglomerated and separated in a sedimentation tank, and the agglomerated sediment is separated into sludge and sedimentation promoting material by separation means, and then the sedimentation promoting material is transported to the floc forming tank for reuse. A method for treating manganese-containing water using a coagulating sedimentation apparatus, wherein a particulate matter containing manganese oxide is used as a settling accelerator.   A flocculation tank equipped with a stirrer, a floc forming tank equipped with a stirrer, a precipitation tank, a drawing means for pulling out the precipitate from the lower part of the settling tank, and a separating means for separating the drawn precipitate into sludge and a settling accelerator. In addition, a chlorine agent, an inorganic flocculant, and a settling accelerator are added to the water to be treated containing manganese in the coagulation tank, a polymer flocculant is added in the floc forming tank, and suspended matter and sediment in the water to be treated The accelerating material is agglomerated and separated in a sedimentation tank, and the agglomerated sediment is separated into sludge and sedimentation promoting material by a separating means, and then the sedimentation promoting material is transported to the aggregation tank and reused. A method for treating manganese-containing water using a coagulation sedimentation apparatus, wherein a particulate matter containing manganese oxide is used as a settling accelerator.   A mixing tank equipped with a stirrer, a coagulation tank equipped with a stirrer, a floc forming tank equipped with a stirrer, a sedimentation tank, a drawing means for pulling out the sediment from the bottom of the sedimentation tank, and a sludge and a sedimentation promoting material And a separation means for separating the chlorinating agent into the water to be treated containing manganese in the mixing tank, adding a chlorinating agent and a settling accelerator, adding an inorganic flocculant in the flocculating tank, and polymer in the floc forming tank. A flocculant is added to suspend the suspended solids in the water to be treated and the sedimentation accelerator, and the precipitate is separated by precipitation in a sedimentation tank. Further, the aggregated and settled precipitate is separated into sludge and sedimentation accelerator by a separating means. Then, a method for treating manganese-containing water using a coagulation sedimentation apparatus that transports and reuses a settling accelerator to a mixing tank, characterized in that a particulate matter containing manganese oxide is used as the settling accelerator. Method for treating manganese-containing water.   The method for treating manganese-containing water according to any one of claims 1 to 3, wherein a particulate material covered with manganese oxide is used as the particulate matter containing manganese oxide.   The method for treating manganese-containing water according to claim 4, wherein the particulate matter covered with the manganese oxide is manganese sand.   The processing method of manganese containing water in any one of Claims 1-3 using the granular material formed with manganese oxide itself as a granular material containing the said manganese oxide.   The method for treating manganese-containing water according to any one of claims 1 to 6, wherein any one of sodium hypochlorite, a liquefied chlorine solution, and chlorine dioxide is used as a chlorine agent to be added to the water to be treated.   Using sodium hypochlorite as a chlorinating agent to be added to the water to be treated, a means for measuring the free chlorine concentration in the treated water from the outlet of the precipitation tank is provided so that the value becomes 0.1 to 1.0 mg / L. The method for treating manganese-containing water according to any one of claims 1 to 7, wherein the injection rate of sodium hypochlorite is controlled.   A flocculation tank equipped with a stirrer, a floc forming tank equipped with a stirrer, a precipitation tank, a drawing means for pulling out the precipitate from the lower part of the settling tank, and a separating means for separating the drawn precipitate into sludge and a settling accelerator. In addition, a chlorine agent and an inorganic flocculant are added to the water to be treated containing manganese in the coagulation tank, a polymer flocculant and a settling accelerator are added in the floc forming tank, and suspended substances and sediment in the water to be treated The accelerating material is agglomerated and separated in a sedimentation tank, and the agglomerated sediment is separated into sludge and sedimentation promoting material by separation means, and then the sedimentation promoting material is transported to the floc forming tank for reuse. An apparatus for treating manganese-containing water using an aggregating and precipitating apparatus, wherein the settling accelerator comprises a granular material containing manganese oxide.   A flocculation tank equipped with a stirrer, a floc forming tank equipped with a stirrer, a precipitation tank, a drawing means for pulling out the precipitate from the lower part of the settling tank, and a separating means for separating the drawn precipitate into sludge and a settling accelerator. In addition, a chlorine agent, an inorganic flocculant, and a settling accelerator are added to the water to be treated containing manganese in the coagulation tank, a polymer flocculant is added in the floc forming tank, and suspended matter and sediment in the water to be treated The accelerating material is agglomerated and separated in a sedimentation tank, and the agglomerated sediment is separated into sludge and sedimentation promoting material by a separating means, and then the sedimentation promoting material is transported to the aggregation tank and reused. An apparatus for treating manganese-containing water using a coagulating sedimentation apparatus, wherein the settling accelerator is made of a granular material containing manganese oxide.   A mixing tank equipped with a stirrer, a coagulation tank equipped with a stirrer, a floc forming tank equipped with a stirrer, a sedimentation tank, a drawing means for pulling out the sediment from the bottom of the sedimentation tank, and a sludge and a sedimentation promoting material And a separation means for separating the chlorinating agent into the water to be treated containing manganese in the mixing tank, adding a chlorinating agent and a settling accelerator, adding an inorganic flocculant in the flocculating tank, and polymer in the floc forming tank. A flocculant is added to suspend the suspended solids in the water to be treated and the sedimentation accelerator, and the precipitate is separated by precipitation in a sedimentation tank. Further, the aggregated and settled precipitate is separated into sludge and sedimentation accelerator by a separating means. Then, the apparatus for treating manganese-containing water using a coagulation sedimentation apparatus that transports and reuses the sedimentation accelerator to a mixing tank, wherein the sedimentation accelerator is made of a granular material containing manganese oxide. Manganese-containing water treatment equipment.   The processing apparatus for manganese-containing water according to any one of claims 9 to 11, wherein the particulate matter containing manganese oxide is composed of particulate matter covered with manganese oxide.   The apparatus for treating manganese-containing water according to claim 12, wherein the particulate matter covered with the manganese oxide is manganese sand.   The apparatus for treating manganese-containing water according to any one of claims 9 to 11, wherein the particulate matter containing manganese oxide is composed of particulate matter formed of manganese oxide itself.   The treatment apparatus for manganese-containing water according to any one of claims 9 to 14, wherein the chlorine agent added to the water to be treated is any one of sodium hypochlorite, a liquefied chlorine solution, and chlorine dioxide.   The chlorinating agent added to the water to be treated is composed of sodium hypochlorite, has a means for measuring the free chlorine concentration in the treated water from the outlet of the precipitation tank, and the value in the measuring means is 0.1 to 1.0 mg The processing apparatus of manganese containing water in any one of Claims 9-15 which has a means to control the injection rate of sodium hypochlorite so that it may become / L.

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