JP6153386B2 - Iron / manganese-containing water treatment apparatus and treatment method - Google Patents

Description

  The present invention relates to a treatment apparatus and treatment method for iron / manganese-containing water containing at least one of iron and manganese.

  River water, groundwater, etc., which are water sources, may contain soluble iron and soluble manganese. As a method for removing soluble iron and soluble manganese in such iron / manganese-containing water, a contact manganese sand filtration method is known. The contact manganese sand filtration method is a method in which soluble manganese is precipitated by oxidation and trapped in manganese sand while raw water is passed through the manganese sand filling tank in a downward flow.

  In addition, as a method of performing high-speed treatment of iron / manganese-containing water, while adding chlorine to raw water, an upward flow of, for example, 1,000 m / day or more is applied to an oxidation treatment tank filled with a manganese oxide catalyst. A method is known in which iron and manganese in raw water are oxidized and precipitated by passing water, and the oxidized precipitate is removed by a subsequent filtration membrane (see, for example, Patent Document 1).

  For example, the conventional iron / manganese-containing water treatment apparatus shown in FIG. 3 includes a raw water tank 50, an oxidation treatment tank 52, a membrane filtration device 56, a treatment water tank 58, and an oxidant tank 60. In the iron / manganese-containing water treatment apparatus shown in FIG. 3, manganese oxide is added at an upward flow of, for example, 1,000 m / day or more while adding an oxidizing agent from the oxidizing agent tank 60 to the raw water from the raw water tank 50. Water is passed through the oxidation treatment tank 52 filled with the catalyst. Iron and manganese in the raw water are oxidized and precipitated by the manganese oxide catalyst, and the deposits and the like flowing out from the oxidation treatment tank 52 are removed by the membrane filtration device 56 in the subsequent stage.

  Compared to the contact manganese sand filtration method, the method as shown in FIG. 3 can pass the raw water at a high linear speed, so that the equipment can be downsized and there is less blockage due to turbidity in the raw water. This has the advantage that the frequency of cleaning the oxidation treatment tank can be reduced.

  However, since the water is passed through the oxidation treatment tank 52 at a high linear velocity of 1,000 m / day or more, for example, when air in the raw water enters the oxidation treatment tank 52, the manganese oxide catalyst is combined with the oxidation treatment water. There is a possibility of being discharged. When the oxidized water containing the discharged manganese oxide catalyst is directly filtered by the membrane filtration device 56, especially when an internal pressure type filtration membrane is used, the manganese oxide catalyst is clogged at the inlet of the filtration membrane, and the membrane Processing may not be performed normally.

  Therefore, as a countermeasure, as shown in FIG. 4, a method of installing an intermediate tank 54 in the role of a buffer between the oxidation treatment tank 52 and the membrane filtration device 56 is often adopted. In addition, since it is necessary to separately install a pump 62 for feeding liquid from the tank 54 to the membrane filtration device 56, there is a problem that the installation space of the entire system becomes large. Moreover, even if the intermediate tank 54 is installed, if a large amount of the manganese oxide catalyst flows out, it is introduced into the subsequent membrane filtration device 56 and the filtration membrane is clogged, and cannot be removed by normal backwashing. Problems can arise.

Japanese Patent No. 3786888

  An object of the present invention is to provide a treatment apparatus and treatment method for iron / manganese-containing water that requires a smaller installation space and enables stable operation of a membrane filtration device as compared with a conventional system.

The present invention provides an oxidizing agent adding means for adding an oxidizing agent to iron / manganese-containing water containing at least one of iron and manganese, and manganese dioxide for oxidizing the oxidizing agent-added water to which the oxidizing agent is added. A turbidity removal apparatus having an oxidation treatment tank filled with an oxidation catalyst containing, a screen or a filter for removing turbidity contained in the oxidized oxidation water, and membrane filtration of the turbidity removal water from which the turbidity has been removed It includes a membrane filtration device which, the said oxidizer added water is passed through a flow rate 1,000 m / day or more upflow in the oxidation processing tank processing apparatus of an iron / manganese-containing water that will be passed through to the.

Moreover, in the said iron / manganese containing water processing apparatus, it is preferable to further provide the backwashing means which backwashes the said membrane filtration apparatus and backwashes the said turbidity removal apparatus. The turbidity removing device is preferably a strainer.

Moreover, this invention contains manganese dioxide, the oxidizing agent addition process which adds an oxidizing agent to the iron / manganese containing water containing at least 1 among iron and manganese, and the oxidizing agent addition water to which the said oxidizing agent was added Oxidation process in which water is passed through an oxidation treatment tank filled with an oxidation catalyst for oxidation treatment, and the oxidized treatment water is passed through a turbidity removal device having a screen or a filter to remove contained turbidity. and turbidity removal step of a membrane filtration step of membrane filtration and passed through a turbidity-free water has been removed the contaminants in the membrane filtration units, only including, the oxidizing agent added water, passed through a flow rate of 1, This is a method for treating iron / manganese-containing water that passes through the oxidation treatment tank in an upward flow of 000 m / day or more .

Moreover, in the processing method of the said iron / manganese containing water, it is preferable to further include the backwashing process which backwashes the said membrane filtration apparatus and backwashes the said turbidity removal apparatus. The turbidity removing device is preferably a strainer.

  In the present invention, by providing a turbidity removing device between the oxidation treatment tank and the membrane filtration device, the installation space is smaller than that of the conventional system, and the iron / manganese-containing water capable of stable operation of the membrane filtration device. The processing apparatus and the processing method can be provided.

It is a schematic block diagram which shows an example of the processing apparatus of the iron / manganese containing water which concerns on embodiment of this invention. It is a schematic block diagram which shows the other example of the processing apparatus of the iron / manganese containing water which concerns on embodiment of this invention. It is a schematic block diagram which shows an example of the conventional iron / manganese containing water processing apparatus. It is a schematic block diagram which shows the other example of the processing apparatus of the conventional iron / manganese containing water. It is a figure which shows the processing result of Example 1 and Comparative Example 1.

  Embodiments of the present invention will be described below. This embodiment is an example for carrying out the present invention, and the present invention is not limited to this embodiment.

  An outline of an example of the iron / manganese-containing water treatment apparatus according to the embodiment of the present invention is shown in FIG. The iron / manganese-containing water treatment device 1 includes an oxidation treatment tank 12 filled with an oxidation catalyst containing manganese dioxide, a turbidity removal device 14, and a membrane filtration device 16. The iron / manganese-containing water treatment apparatus 1 may include a raw water tank 10 and a treated water tank 18.

  In the iron / manganese-containing water treatment apparatus 1 of FIG. 1, a raw water pipe 28 is connected to the inlet of the raw water tank 10, and the outlet of the raw water tank 10 and the oxidizing agent added water inlet of the oxidation treatment tank 12 are connected via a pump 22. The raw water supply pipe 30 is connected, the outlet of the oxidation treatment tank 12 and the inlet of the turbidity removal device 14 are connected by the oxidation water pipe 32, and the outlet of the turbidity removal device 14 and the inlet of the membrane filtration device 16 are turbid. The membrane filtered water outlet 34 of the membrane filtration device 16 and the inlet of the treated water tank 18 are connected by a membrane filtered water pipe 36, and the treated water pipe 38 is connected to the treated water outlet of the treated water tank 18. Has been. Further, the backwash water outlet of the treated water tank 18 and the middle of the membrane filtration water pipe 36 are connected by a backwash water pipe 42 via the pump 26, and the membrane filtration device backwash drainage outlet of the membrane filtration device 16 and turbidity removal. The middle of the water pipe 34 is connected by a membrane filtration device backwash drain pipe 44, and a cleaning drain pipe 46 is connected to the cleaning drain outlet of the oxidation treatment tank 12. An outlet of the oxidant tank 20 is connected to the downstream side of the pump 22 of the raw water supply pipe 30 by an oxidant pipe 40 via a pump 24.

  The operation of the iron / manganese-containing water treatment method and the iron / manganese-containing water treatment apparatus 1 according to the present embodiment will be described.

  Iron / manganese-containing water containing at least one of iron and manganese, which is raw water, is stored in the raw water tank 10 through the raw water pipe 28 as necessary. The iron / manganese-containing water is sent to the oxidation treatment tank 12 through the raw water supply pipe 30 by the pump 22, and in the middle of the raw water supply pipe 30, the oxidant from the oxidant tank 20 passes through the oxidant pipe 40 by the pump 24. / Addition to manganese-containing water (oxidizing agent adding step), and sent to the oxidation treatment tank 12 as oxidizing agent added water. In the present embodiment, the oxidant tank 20, the pump 24, and the oxidant pipe 40 function as oxidant addition means.

  In the oxidation treatment tank 12, the oxidant-added water is passed in an upward flow and is oxidized by an oxidation catalyst containing filled manganese dioxide (oxidation treatment step). While the oxidizing agent is added to the iron / manganese-containing water, water is passed through the oxidation treatment tank 12 filled with the oxidation catalyst containing manganese dioxide, so that dissolved iron and dissolved manganese are oxidized and precipitated.

  Oxidized oxidized water is sent from the outlet of the oxidation treatment tank 12 to the turbid removal device 14 through the oxidized treatment water pipe 32, and the turbid removal device 14 includes an oxidation catalyst or the like contained in the oxidized treatment water. Turbidity etc. are removed (turbidity removal process).

  The turbidity-removed water from which turbidity and the like have been removed is sent to the membrane filtration device 16 through the turbidity-removed water pipe 34, and the oxidatively deposited precipitates and the like are subjected to membrane filtration in the membrane filtration device 16 (membrane filtration). Process).

  The membrane filtrate of the membrane filtration device 16 is sent to the treated water tank 18 through the membrane filtrate pipe 36 and stored. A predetermined amount of treated water stored in the treated water tank 18 is discharged through the treated water pipe 38.

  By installing the turbidity removal device 14 between the oxidation treatment tank 12 and the membrane filtration device 16, the turbid matter including the oxidation catalyst that has flowed out without installing an intermediate tank or the like is transferred to the subsequent membrane filtration device 16. Since introduction can be suppressed, stable operation of the membrane filtration device 16 becomes possible, and the installation space of the entire iron / manganese-containing water treatment device can be reduced. Further, it is not necessary to separately install a pump or the like for feeding liquid from the intermediate tank to the membrane filtration device, which leads to a reduction in initial running cost.

  When it is necessary to clean the membrane of the membrane filtration device 16, at least a part of the treated water stored in the treatment water tank 18 is supplied from the membrane filtration water outlet side to the membrane filtration device 16 through the backwash water pipe 42 by the pump 26. Then, the membrane is backwashed (backwashing step). In the present embodiment, the treated water tank 18, the pump 26, and the backwash water pipe 42 function as backwashing means.

  The backwash drainage of the membrane filtration device 16 exits the backwash drainage outlet of the membrane filtration device 16 and is discharged from the middle of the membrane filtration device backwash drainage pipe 44, for example.

  In the present embodiment, it is preferable to perform backwashing of the turbidity removal device 14 when the membrane filtration device 16 is backwashed. When cleaning of the turbidity removal device 14 is also required, at least part of the backwash drainage of the membrane filtration device 16 is removed from the backwash drainage outlet of the membrane filtration device 16 to the membrane filtration device backwash drainage pipe 44, turbidity removal. The turbidity removal device 14 is supplied through the water pipe 34 and the turbidity removal device 14 is backwashed (turbidity removal device backwashing step). In this case, the backwashing step includes a membrane filtration device backwashing step and a turbidity removal device backwashing step, and includes a treated water tank 18, a pump 26, a backwashing water pipe 42, a membrane filtration device backwashing drainage pipe 44, and turbidity removal. The water pipe 34 functions as backwashing means.

  The backwash drainage of the turbidity removal apparatus 14 exits from the backwash drainage outlet of the turbidity removal apparatus 14 and is discharged from the middle of the oxidation-treated water pipe 32, for example.

  In addition, when the oxidation treatment tank 12 needs to be cleaned, at least a part of the raw water stored in the raw water tank 10 is supplied by the pump 22 through the raw water supply pipe 30 to the oxidation treatment tank 12 in an upward flow. The tank 12 is cleaned (cleaning process). In order to remove deposits and the like on the oxidation catalyst when the oxidation treatment tank 12 is washed, the linear velocity exceeds the linear velocity during normal operation, for example, as an upward flow at a higher linear velocity of about 2,000 to 3,500 m / day. The raw water from the aquarium 10 may be passed.

  The iron / manganese-containing water to be treated contains at least one of iron and manganese, preferably contains at least manganese, and usually contains both iron and manganese. The content of soluble iron in the iron / manganese-containing water is, for example, in the range of 0.1 to 10 mg / L, and the content of soluble manganese is, for example, in the range of 0.01 to 5 mg / L.

  Examples of the iron / manganese-containing water to be treated include river water, groundwater, lake water, and the like.

  Examples of the oxidizing agent include sodium hypochlorite, bleached powder, potassium permanganate, chlorine dioxide and the like, and sodium hypochlorite is preferable from the viewpoint of running cost, versatility and the like.

  The amount of oxidant added is, for example, in the range of 0.5 mol to 2 mol with respect to 1 mol of iron for soluble iron in iron / manganese-containing water, The range is from 1 mol to 4 mol with respect to 1 mol of manganese content. If the addition amount of the oxidizing agent is less than the above value, the reaction may be insufficient. If it is excessively added, the cost may be disadvantageous and the amount of trihalomethane generated may increase.

  Examples of the oxidation catalyst containing manganese dioxide include an oxidation catalyst in which manganese dioxide is granular and solid, manganese sand, and the like. Further, the manganese dioxide is not particularly limited, and examples thereof include manganese dioxide having α-type, β-type, ε-type, γ-type, λ-type, δ-type, and R-type crystal structures. From this point, manganese dioxide having a β-type crystal structure is preferable.

The density of the oxidation catalyst containing manganese dioxide is preferably 2.8 g / cm ³ or more. When the density of the oxidation catalyst containing manganese dioxide is less than 2.8 g / cm ³ , the catalyst develops when water is passed at high speed, and the tank height of the oxidation treatment tank 12 may increase.

  The particle diameter of the oxidation catalyst containing manganese dioxide is preferably in the range of 0.4 mm to 2.0 mm. If the particle size of the oxidation catalyst containing manganese dioxide is less than 0.4 mm, the rate of expansion of the catalyst may increase, and particles having a small particle size may flow out. Efficiency may be reduced.

  The water flow velocity by the upward flow in the oxidation treatment tank 12 is, for example, a high linear velocity in the range of 1,000 m / day to 3,600 m / day, and in the range of 1,200 m / day to 2,400 m / day. Preferably there is. If the water flow rate due to the upward flow in the oxidation treatment tank 12 is less than 1,000 m / day, the catalyst may not flow substantially uniformly, and a single flow may occur. If it exceeds 3,600 m / day, There are cases where the expansion rate is increased and the tank height of the oxidation treatment tank 12 is increased.

  The reaction temperature in the oxidation treatment tank 12 is, for example, in the range of 1 ° C to 50 ° C.

  The turbidity removal device 14 is not particularly limited as long as it can capture an oxidation catalyst or the like that is usually about 0.5 mm in diameter. As the turbidity removal device 14, for example, a Y-type strainer, a T-type strainer, a U-type strainer, a safety filter, or the like that can be easily installed in the middle of the piping can be used. When using a strainer, a screen of stainless steel plain weave 20, 30, 40, 60, 80, 100 mesh or the like is suitable for use. When a safety filter is used, a screen with a filtration accuracy of about 100 to 400 μm is suitable for use. .

  The filtration membrane used in the membrane filtration device 16 is not particularly limited as long as it can filter the precipitate deposited by oxidation, and examples thereof include a UF membrane and an MF membrane. From an oxidation catalyst containing manganese dioxide, for example. A UF membrane is preferable from the viewpoint that fine manganese particles (for example, less than 0.1 μm) and the like that have been peeled can be removed.

  In this embodiment, it is preferable that the backwashing of the turbidity removal device 14 is performed together with the backwashing of the membrane filtration device 16, and the backwash drainage of the turbidity removal device 14 is used for cleaning the oxidation treatment tank 12. FIG. 2 shows a schematic configuration of another example of the iron / manganese-containing water treatment apparatus according to this embodiment. The iron / manganese-containing water treatment device 3 is the same as the iron / manganese in FIG. 1 except that the middle of the oxidation treatment water pipe 32 and the washing water inlet of the oxidation treatment tank 12 are connected by the turbidity removal device backwash drainage pipe 48. The structure is the same as that of the manganese-containing water treatment apparatus 1.

  When it is necessary to clean the membrane of the membrane filtration device 16, at least a part of the treated water stored in the treatment water tank 18 is supplied from the membrane filtration water outlet side to the membrane filtration device 16 through the backwash water pipe 42 by the pump 26. The filtration membrane is backwashed (membrane filtration device backwashing step). The backwash drainage of the membrane filtration device 16 exits the backwash drainage outlet of the membrane filtration device 16 and is discharged from the middle of the membrane filtration device backwash drainage pipe 44, for example.

  When cleaning of the turbidity removal device 14 is also required, at least part of the backwash drainage of the membrane filtration device 16 is removed from the backwash drainage outlet of the membrane filtration device 16 to the membrane filtration device backwash drainage pipe 44, turbidity removal. The turbidity removal device 14 is supplied through the water pipe 34 and the turbidity removal device 14 is backwashed (turbidity removal device backwashing step).

  When there is almost no outflow of the oxidation catalyst from the oxidation treatment tank 12 in the oxidation treatment process, and the turbid component etc. are captured by the turbidity removal device 14, the backwash waste water of the turbidity removal device 14 is, for example, turbidity It exits from the backwashing drain outlet of the removing device 14 and is discharged from the middle of the oxidized water pipe 32.

  When the oxidation catalyst flows out of the oxidation treatment tank 12 in the oxidation treatment step and the discharged oxidation catalyst is captured by the turbidity removal device 14, the backwash waste water of the turbidity removal device 14 is discharged from the oxidation treatment tank 12. It may be used for cleaning. In this case, for example, the backwash wastewater from the turbidity removal device 14 is oxidized from the backwash drainage outlet of the turbidity removal device 14 to return the oxidation catalyst captured by the turbidity removal device 14 to the oxidation treatment tank 12 first. It is supplied to the oxidation treatment tank 12 through the treated water pipe 32. Thereafter, the backwash drainage of the turbidity removal apparatus 14 is supplied in an upward flow to the oxidation treatment tank 12 through the turbidity removal apparatus backwash drainage pipe 48, and the oxidation treatment tank 12 is cleaned (cleaning step). The washing waste water in the oxidation treatment tank 12 is discharged through the washing drain pipe 46. In this case, the treatment water tank 18, the pump 26, the backwash water pipe 42, the membrane filtration device backwash drainage pipe 44, the turbidity removal water pipe 34, and the turbidity removal device backwash drainage pipe 48 serve as cleaning means for the oxidation treatment tank 12. Will work. Further, only the step of returning the oxidation catalyst captured by the turbidity removing device 14 to the oxidation treatment tank 12 may be performed in a process different from the cleaning of the oxidation treatment tank 12.

  When the membrane filtration device 16 is backwashed, the turbidity removal device 14 can be backwashed automatically at the same time, so even if the oxidization catalyst that has flowed out is clogged in the turbidity removal device 14, it is bothersome to remove the turbidity. There is no need to perform maintenance by removing the device 14 from the piping, and there is almost no hindrance to the continuous operation of the iron / manganese-containing water treatment device 1. Further, the turbidity removal device backwash waste water can be used for cleaning the oxidation treatment tank 12, and in this case, the oxidization catalyst that has flowed out can be recovered (for example, the recovery rate is approximately 100%). Therefore, there is an advantage that it is not necessary to replenish the oxidation catalyst.

  The backwashing flux of the membrane filtration device 16, the turbidity removal device 14, and the cleaning flux of the oxidation treatment tank 12 may be, for example, about 1.5 to 4 times the normal water flow rate. If the backwashing flux of the membrane filtration device 16 and the turbidity removal device 14 and the cleaning flux of the oxidation treatment tank 12 are less than 1.5 times the normal water flow rate, cleaning may be insufficient. When it exceeds 4 times, the capacity | capacitance of a backwash pump will become large and a running cost may increase.

  In the iron / manganese-containing water treatment method and treatment apparatus according to the present embodiment, as described above, the iron / manganese-containing water is passed through the oxidation treatment tank 12 at a high linear velocity of, for example, 1,000 m / day or more. Of course, it can be applied to a conventional contact manganese sand filtration method in which iron / manganese-containing water is passed through the oxidation treatment tank in a downward flow.

  The water flow velocity by the downward flow in the oxidation treatment tank 12 is, for example, in the range of 120 m / day to 720 m / day, and preferably in the range of 140 m / day to 360 m / day. If the water flow velocity due to the downward flow in the oxidation treatment tank 12 is less than 120 m / day, the device may become large, and if it exceeds 720 m / day, the turbidity becomes clogged and the water cannot pass through immediately. There is.

  The iron / manganese-containing water treatment apparatus and treatment method according to the present embodiment can be suitably applied in, for example, a water purification plant, groundwater use water treatment, and the like.

  Hereinafter, although an example and a comparative example are given and the present invention is explained more concretely in detail, the present invention is not limited to the following examples.

<Example 1>
The iron / manganese-containing water treatment apparatus described in FIG. 2 was used to treat iron / manganese-containing water. As a turbidity removal device, a Y-type strainer (screen is stainless wire plain weave 40 mesh) was installed. In the oxidation treatment tank, water was passed by an upward flow of 1,440 m / day. As an oxidation catalyst containing manganese dioxide, manganese dioxide catalyst particles having a β-type crystal structure with an effective diameter of 0.5 mm and a density of 4.0 g / cm ³ were used. As the filtration membrane, a PVC UF membrane was used, the membrane filtration flux was 2.0 m / day, and the recovery rate of the treated water relative to the raw water was 95%. Backwashing of the membrane filtration device using the treated water is performed once / hour, and backwashing of the turbid removal device using the backwash waste water of the membrane filtration device and washing of the oxidation treatment tank are performed once / week. Done with frequency. FIG. 5 shows changes with time in the transmembrane pressure difference of the membrane filtration device.

  The manganese concentration of the iron / manganese-containing water, which is the raw water treated using the iron / manganese-containing water treatment apparatus shown in FIG. 2, and the manganese concentration of the treated water after 10 days, 100 days, and 196 days were measured. An IPC mass spectrometer (manufactured by PerkinElmer, Inc., NexION) was used for the measurement. The results are shown in Table 1.

<Comparative Example 1>
The iron / manganese-containing water treatment apparatus shown in FIG. 4 was used to treat iron / manganese-containing water. The iron / manganese-containing water treatment apparatus shown in FIG. 4 is a raw water tank 50, an oxidation treatment tank 52, a membrane filtration device 56, and a treatment water tank 58, similarly to the iron / manganese-containing water treatment apparatus shown in FIG. However, the turbidity removal device 14 is not installed between the oxidation treatment tank 52 and the membrane filtration device 56, but an intermediate tank 54 and a pump 62 are installed instead. Backwashing of the membrane filtration apparatus using treated water was performed once / hour. FIG. 5 shows changes with time in the transmembrane pressure difference of the membrane filtration device.

  In the same manner as in Example 1, the manganese concentration of the raw iron / manganese-containing water and the manganese concentration of the treated water after 10 days, 100 days, and 196 days were measured. The results are shown in Table 1.

  As shown in FIG. 5, the use of the iron / manganese-containing water treatment device of Example 1 significantly increased the transmembrane pressure difference of the membrane filtration device as compared with the iron / manganese-containing water treatment device of Comparative Example 1. It became possible to suppress. Further, after 196 days had passed, in Comparative Example 1, the oxidation catalyst flowed out about 10% later, whereas in Example 1, there was almost no decrease in the oxidation catalyst. In addition, regarding the manganese concentration of the treated water, Example 1 was superior as shown in Table 1. Compared to the apparatus of Comparative Example 1, the iron / manganese-containing water treatment apparatus of Example 1 can reduce the installation space by about 30%.

  Thus, in the iron / manganese-containing water treatment device of Example 1, the installation space was smaller than in the iron / manganese-containing water treatment device of Comparative Example 1, and stable operation of the membrane filtration device became possible.

  1,3 Iron / manganese-containing water treatment device, 10,50 raw water tank, 12,52 oxidation treatment tank, 14 turbidity removal device, 16,56 membrane filtration device, 18,58 treatment water tank, 20,60 oxidizer tank, 22, 24, 26, 62 Pump, 28 Raw water piping, 30 Raw water supply piping, 32 Oxidized water piping, 34 Turbidity removal water piping, 36 Membrane filtered water piping, 38 Treated water piping, 40 Oxidant piping, 42 Backwash Water piping, 44 Membrane filtration device backwash drainage piping, 46 Washing drainage piping, 48 Turbidity removal device backwash drainage piping, 54 Intermediate tank.

Claims (6)

An oxidizing agent adding means for adding an oxidizing agent to iron / manganese-containing water containing at least one of iron and manganese;
An oxidation treatment tank filled with an oxidation catalyst containing manganese dioxide, which oxidizes the oxidant-added water to which the oxidant is added;
A turbidity removal apparatus having a screen or filter for removing turbidity contained in the oxidized oxidized water;
A membrane filtration device for membrane filtration of the turbidity-removed water from which the turbidity has been removed;
Equipped with a,
The oxidizing agent added water is passed through a flow rate 1,000 m / day or more upflow in the oxidation processing tank processing apparatus of an iron / manganese-containing water, wherein Rukoto is Rohm. The iron / manganese-containing water treatment apparatus according to claim 1,
A treatment apparatus for iron / manganese-containing water, further comprising backwashing means for backwashing the membrane filtration device and backwashing the turbidity removal device. The iron / manganese-containing water treatment apparatus according to claim 1 or 2,
  The said turbidity removal apparatus is a strainer, The processing apparatus of the iron / manganese containing water characterized by the above-mentioned. An oxidizing agent adding step of adding an oxidizing agent to iron / manganese-containing water containing at least one of iron and manganese;
An oxidation treatment step in which the oxidant-added water to which the oxidant has been added is passed through an oxidation treatment tank filled with an oxidation catalyst containing manganese dioxide to oxidize, and
A turbidity removing step of removing the turbidity contained by passing the oxidized treated water through a turbidity removing device having a screen or a filter ;
A membrane filtration step of passing the turbidity-removed water from which the turbidity has been removed through a membrane filtration device and performing membrane filtration;
Only including,
A method for treating iron / manganese-containing water, wherein the oxidant-added water is passed through the oxidation treatment tank at an upward flow of 1,000 m / day or more . It is a processing method of the iron / manganese containing water of Claim 4 , Comprising:
The method for treating iron / manganese-containing water further includes a backwashing step of backwashing the membrane filtration device and backwashing the turbidity removal device. A method for treating iron / manganese-containing water according to claim 4 or 5,
  The said turbidity removal apparatus is a strainer, The processing method of the iron / manganese containing water characterized by the above-mentioned.

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