WO2017209353A1 - Water treatment apparatus using external housing-type membrane bioreactor - Google Patents

Abstract

The present invention relates to a water treatment apparatus, which can be applied to the field of treating, by using a membrane bioreactor (MBR), heavy water, discharged after service water is used, such as sewage, wastewater, industrial wastewater, and livestock wastewater, and the present invention presents: a hybrid water treatment apparatus capable of selectively applying a filtering method of a separation membrane module according to a change in the flowrate of filtered water produced; a configuration for optimizing self-cleaning without withdrawing the MBR, a specific withdrawal and accommodation configuration for the installation and separation of the MBR, and a configuration for optimized sealing of a housing; and, simultaneously, a configuration allowing cleaning balls or a moving carrier to collide with the surface of a separation membrane, thereby removing contaminants, and a configuration capable of implementing water treatment without stopping the whole process while one MBR is cleaned, since the MBRs are accommodated in each independently provided housing.

Description

Water treatment device using external housing type membrane bioreactor

The present invention relates to a water treatment apparatus that may be applied to the field of heavy water treatment discharged after using a constant, including sewage, sewage, industrial wastewater and livestock wastewater using a membrane bioreactor.

In general, wastewater containing organic pollutants, nitrogen, and phosphorus depletes dissolved oxygen in the water, destroying the aquatic ecosystem, and eutrophicating the water in lakes and reservoirs. Therefore, in order to prevent water pollution in rivers, contaminants and organic nutrients contained in the waste water should be removed before they enter the body of the river or the like.

As a treatment method of wastewater treatment facilities to remove this, many biological treatment methods that are excellent in economics are being applied. Among the biological treatment methods, organic matters using microorganisms such as activated sludge method and advanced treatment are being removed. Proliferated microorganisms are generated as waste sludge.

As a representative biological treatment method, activated sludge method grows as microorganisms ingest and decompose organic matter in wastewater and proceed to nitrification as wastewater is continuously injected into aeration tank. As a result, some of the precipitate is returned to the aeration tank (or other reaction tank) in the form of activated sludge, and some excess sludge is discarded, so that the amount of microorganisms in the aeration tank is maintained at an appropriate level to remove nitrogen, phosphorus, etc. together with organic matter decomposition in the wastewater. .

This activated sludge method is combined with membrane bioreactor (MBR) to maintain microorganisms in high concentrations to increase organic matter, nitrogen and phosphorus treatment efficiency, and to reduce sludge bulking and sedimentation efficiency that may occur according to the settling basin. I prevent it beforehand.

The present applicant has proposed a water treatment apparatus capable of horizontal storage or withdrawal of MBR through Korean Patent No. 1044350 (prior invention 1), and effectively reduce fouling through Korean Patent No. 1068205 (prior invention 2). An MBR bath assembly is presented.

The two registered patents do not have an MBR installed in the aerobic tank, but are separately installed at the rear end of the aerobic tank. Such an external MBR method can independently control the MBR to increase the efficiency of the water treatment process.

On the other hand, in the operation of the MBR-type water treatment apparatus, when fouling (fouling) on the membrane surface of the membrane is increased, the membrane pressure of the membrane is increased to reduce the filtration efficiency. Conventionally, the method of discharging the filtrate by continuously applying a constant pressure to the filtrate discharge side of the separation membrane, this method is applied to the same pressure irrespective of the membrane differential pressure, the filtrate is increased when the membrane differential pressure is increased There is a high risk of reduced emissions or damaged membranes.

In particular, although the above-described water treatment apparatus of each of the above-described inventions carries out the horizontally withdrawal and storage of the MBR in the housing or the cleaning process using the cleaning air in the housing, the withdrawal and storage of such MBR is not only very troublesome. The cleaning process using the cleaning air has a low cleaning efficiency, which is a factor for lowering the overall water treatment efficiency because the cleaning process has to be performed frequently.

In addition, the water treatment apparatus of each of the preceding inventions, when the operation by the manpower is carried out when the installation and removal of the MBR, or withdrawal and storage horizontally in the housing for the status check or maintenance of the membrane bioreactor, etc. This extremely unstable and cumbersome problem is exposed.

In addition, the water treatment apparatus of the present invention requires a significant sealing efficiency in the closed state of the side door of the housing for drawing and receiving the MBR because the inside of the housing must be completely sealed during the water treatment process. Accordingly, the door is fastened by a plurality of bolts, in which the frequent fastening and disassembly of the bolts for opening and closing the housing doors causes a problem of water leakage caused by the expansion of the screw grooves.

The present invention is to solve the above problems and has the following object.

First, the present invention by selectively applying the gravity filtration method and the pump-type filtration method according to the fluctuation of the filtration water production flow treated by the separation membrane, while maintaining the filtration water production flow rate at a certain level to prevent damage to the membrane and reduce the power cost It is possible to provide a water treatment device that can extend the life of the separator.

Second, an object of the present invention is to provide a water treatment apparatus that can improve the filtration efficiency of the MBR tank by presenting the optimal filtration process and washing process of the MBR tank.

Third, if the MBR itself is contaminated in the process of treating wastewater by the MBR and the water treatment efficiency is lowered, an object of the present invention is to provide a water treatment apparatus equipped with a configuration to enable self-cleaning without drawing out the MBR to the outside. have.

Fourth, an object of the present invention is to provide a water treatment apparatus that provides a dedicated transport means for performing horizontal withdrawal and storage of the MBR in the housing so that the withdrawal and storage of the MBR can be performed more stably and conveniently.

Fifth, an object of the present invention is to provide a water treatment apparatus for improving the sealing efficiency of the housing during water treatment by providing a fastening means and sealing means for the side door of the housing for drawing out and storing the MBR.

Sixth, the present invention provides a water treatment apparatus that allows the washing ball and the fluid carrier to be convection (circulated) in an optimal form together with air bubbles generated and raised by the air diffuser unit to remove contaminants attached to the separator itself. The purpose is to provide.

Seventh, the present invention aims to provide a water treatment apparatus which does not need to stop the whole process while washing one MBR.

In order to achieve each of the above objects, the present invention has the following solution.

The present invention to achieve the first object, the aerobic tank to induce nitrification of raw water; And an MBR tank provided at a rear end of the aerobic tank and filtering raw water through a gravity filtration process using a water head difference between the raw water and the membrane module while using the membrane module. The MBR tank includes the membrane module. A filtrate discharge pipe provided at one side to discharge the filtrate filtered by the separation membrane, a filtrate flow meter provided at one side of the filtrate discharge pipe to measure the filtrate flow rate passing through the filtrate discharge pipe, and provided at one end of the filtrate discharge pipe to the separation membrane And a filtrate pump for discharging the filtrate generated by the filtrate, and determining whether the filtrate flow rate measured by the filtrate flow meter satisfies a preset standard flow rate, and the filtrate water according to whether the filtrate flow rate measured is satisfied. It comprises a control device for controlling the operation of the pump, The apparatus operates the filtrate pump when the filtrate flow rate measured by the flowmeter is less than the reference flow rate to allow the pump type filtration process to proceed, and stops the operation of the filtrate pump when the measured filtrate flow rate is higher than the standard flow rate, and the measured filtrate If the flow rate is more than the reference flow rate gravity filtration process is carried out, if the measured filtration water flow rate is less than the reference flow rate is configured to proceed with the gravity filtration process and the pump type filtration process at the same time.

Here, the present invention is a raw material supply pipe for supplying the exhaled raw water of the exhalation tank and the MBR tank, suspended material measuring sensor for measuring the MLSS concentration of the exhaled raw water provided on one side of the raw water supply pipe or provided in the MBR tank It is further provided, wherein the control unit is configured to reduce the inflow of raw water when the measured MLSS concentration is less than the predetermined reference concentration, and to increase the inflow of raw water when the measured MLSS concentration is greater than the predetermined reference concentration.

In addition, the present invention is further provided with a differential pressure gauge for measuring the membrane pressure difference of the membrane on one side of the filtered water discharge pipe, the control device discharges all the concentrated sludge in the MBR tank when the membrane differential pressure of the membrane exceeds a predetermined reference pressure Water treatment apparatus using MBR characterized in that the control to be returned to the aerobic tank.

In order to achieve the second object, the present invention is further provided with a differential pressure gauge for measuring the membrane pressure difference of the membrane on one side of the filtered water discharge pipe, the control device stops the filtration process if the membrane pressure difference of the membrane is greater than the predetermined washing differential pressure; The MBR bath is controlled to proceed with the washing process, and the water level in the MBR bath during the washing process is configured to be maintained at 1/3 level of the level of the filtration process.

On the other hand, the present invention is further provided with a coagulant supply device on one side of the MBR tank to remove the phosphorus component contained in the aerobic raw water, it is configured to supply a coagulant to the MBR tank through the coagulant supply device.

In particular, the exhaled raw water of the aerobic tank is configured to be supplied upstream through the bottom of the MBR tank.

In addition, the present invention is provided with a sludge convection movement path plate for smooth convection movement of the sludge in the reaction tank of the MBR tank, the sludge convection movement path plate is configured in the vertical direction on the side of the reactor.

On the other hand, the present invention is provided with an MBR tank cover for blocking sludge odor outflow on the top of the MBR tank or is provided with a supply and exhaust device.

In addition, the present invention is provided with a sludge leak sensor on one side of the filtered water discharge pipe, when the sludge is discharged included in the filtered water due to breakage or breakage of the membrane module, the sludge leak sensor detects this, the control device is a sludge leak When the sensor detects sludge in the filtrate, it is configured to stop the operation of the filtrate pump or to close the filtrate valve.

At the same time, the present invention is configured on one side of the MBR tank, the overflow water discharge pipe for gravity filtration process and the overflow water discharge pipe for pump type filtration process independently.

In order to achieve the third object, the present invention provides a water treatment apparatus in which a membrane bioreactor is installed inside a housing to discharge waste water supplied from an aerobic tank by means of a membrane bioreactor, wherein the membrane bioreactor is treated with water. The housing is connected to the cleaning driving unit which is driven when the membrane bioreactor itself is contaminated to clean the membrane bioreactor.

In addition, the washing driving unit, the washing water supply unit which is a supply source of the washing water, including a washing water supply line for allowing the washing water to proceed to the housing; A pump installed at the washing water supply unit and the washing water supply line of the housing to advance the washing water to the housing; It is electrically connected to the pump is configured to include a controller for controlling the supply of the washing water and the drainage and the amount and time of supply of the washing water.

In order to achieve the fourth object of the present invention, an opening is formed in a lateral direction to draw out and receive a membrane bioreactor horizontally, and the water treatment apparatus is provided with a door for opening and closing the opening. An inner rail installed at a lower side thereof so that the membrane bioreactor is mounted to slide in the direction of the opening in the housing; The membrane bioreactor, which is disposed outside the housing and has a top rail disposed at a height corresponding to the top surface of the inner rail for slide transfer of the membrane bioreactor, is transferred by the inner rail, and is further transferred by the outer rail. And a conveying means to draw the membrane bioreactor horizontally.

Here, the transfer means, the upper surface is positioned at a height corresponding to the upper surface of the inner rail, the outer rail disposed in the same longitudinal direction as the longitudinal direction of the inner rail to transfer the membrane bioreactor to the outside of the housing; When the outer rail is mounted and fixed to the membrane bioreactor is transferred to the outer rail is configured to include a mobile bogie to move the membrane bioreactor to the desired point.

In order to achieve the fifth object of the present invention, a plurality of fastening means are installed on the outside of the opening to fix the door after the door seals the opening to the housing, and the fastening means is coupled to the housing to secure the door. It comprises a fastening bolt penetrating, and an eye nut screwed to the fastening bolt penetrating the door to close the door to the housing.

In addition, the fastening bolt is hinged to the housing is installed so as to rotate angularly, a fastening groove formed by opening to the outside at the point through which the fastening bolt of the door is formed to form a fastening bolt after the door is in close contact with the opening of the housing. After inserting into the fastening groove, the eye nut is configured to be fastened.

In particular, the door is coupled to the sealing member for sealing the inner space of the housing to the surface in close contact with the opening of the housing, the sealing member is applied to the rubber plate material of a single area larger than the opening area of the opening at least.

In order to achieve the sixth object of the present invention, an MBR provided with an air diffuser unit to generate air bubbles in the lower side of the separation membrane unit is housed and disposed inside the housing, and the waste water supplied from the aerobic tank is discharged by water treatment by the MBR. In the water treatment apparatus, a washing ball or a fluid carrier is introduced into the housing to remove the contaminants of the separator by spraying the cleaning ball or the fluid carrier with air bubbles and contacting the separator when the MBR is washed. It is configured, the bottom edge of the housing is formed with a chamber having an inclination angle is configured so that the washing ball or fluid carrier convection in the housing can proceed to the lower side of the diffuser unit without remaining in the corner of the housing.

In addition, an overflow recovery pipe for transporting excess sludge to an aerobic tank is formed inside the housing, and at the inlet of the overflow recovery pipe, a mesh screen having a hole formed at least smaller than a washing ball or a fluid carrier is installed so that the sludge overflows. It is configured to prevent the washing ball or the fluid carrier from flowing out when it is discharged through the recovery pipe, and a bubbler is installed at the bottom of the mesh screen, and the washing ball or the fluid carrier is generated by the air bubbles generated by the bubbler. By preventing the adherence to the mesh screen, the wash ball or flowable carrier is configured to not interfere with sludge discharge.

In order to achieve the seventh object, the present invention provides a water treatment apparatus in which an MBR is installed inside a housing to discharge wastewater supplied from an aerobic tank by water treatment. A plurality of independent spaces are partitioned and installed, MBR is disposed in each of the housings or independent spaces, and pipes for receiving water from an aerobic tank are installed in each of the housings or independent spaces, respectively. Each supply line is installed and configured.

As described above, according to the present invention, the filtration water production flow rate can be kept constant by applying a gravity filtration process or simultaneously applying the gravity filtration process and the pump filtration process according to the variation of the filtration water flow rate produced by the membrane module.

In addition, the present invention can optimize the filtration process by controlling the inflow of the raw water according to the MLSS concentration of the aerobic raw water and selectively discharge the concentrated sludge in the MBR tank according to the membrane pressure of the membrane.

Meanwhile, the present invention enables self-cleaning by washing water without withdrawing MBR from the water treatment point, so that the washing process can be carried out more quickly and simply. In particular, the effect of obtaining high washing efficiency by washing water can be obtained. There is.

In addition, the present invention is provided with a dedicated transport means for drawing and storing the MBR horizontally over the inside and outside of the housing to obtain the effect that the operation for drawing and storing the MBR is more easily and stably performed.

At the same time, the present invention has the effect of improving the fastening means for fastening the door to the housing, the sealing efficiency of the inner space of the housing is improved by the sealing member installed inside the door to prevent water leakage during the water treatment process.

In addition, the present invention is convection (circulation) with excellent efficiency inside the housing is attached to the MBR by the washing ball or the fluid carrier to increase the removal efficiency of the remaining contaminants can be expected more excellent water treatment effect.

In particular, the present invention does not interfere with the operation of the other MBR even if one MBR is taken out of the housing cell, so that only the corresponding MBR may be cleaned without affecting the overall water treatment apparatus.

1 is a block diagram of a first embodiment of a water treatment apparatus of the present invention.

2 is a block diagram of a water treatment device according to a first embodiment of the present invention.

3 is a plan view of a first embodiment of a water treatment apparatus of the present invention.

4 is a block diagram of a water treatment system cleaning system of a second embodiment of the present invention;

Figure 5 is a flow chart of the water treatment process of Example 2 of the present invention.

Figure 6 is a perspective view of the second embodiment of the water treatment apparatus of the present invention in an open state.

Figure 7 is a perspective view of a sealed state 2 water treatment device of the present invention.

8 is a side view of a second embodiment of a water treatment apparatus of the present invention.

9 is an exemplary view of the use of the second embodiment of the water treatment apparatus of the present invention.

Figure 10 is an enlarged perspective view of the fastening means of the second embodiment of the water treatment apparatus of the present invention.

11 is an enlarged cross-sectional view of a fastening means of a second embodiment of a water treatment apparatus of the present invention.

12 is an enlarged view of a main part of a water treatment device of a third embodiment of the present invention;

13 is a block diagram of a fourth embodiment of a water treatment device of the present invention.

<Explanation of symbols for the main parts of the drawings>

Example 1

10: Exhalation Tank 11: Raw Water Supply Pipe

100: MBR tank 111: sludge convection movement path plate

112: overflow recovery pipe 113: flocculant supply unit

120: MBR 121: membrane module

122: diffuser 123: filtered water discharge pipe

124: filtered water pump 210: control device

220: filtered water flow meter 230: suspended solids measuring sensor

240: differential pressure gauge 250: filtrate valve

Example 2

1: Exhalation tank 2: Cleaning drive part

3: washing water supply line 4: washing water supply

5: pump 6: controller

7: reservoir tank 8: chemical supply line

9: chemical storage tank 10: housing

11: door 12: opening

20: membrane bioreactor 21: diffuser

30: transfer means 31: inner rail

32: outer rail 33: moving cart

40: fastening means 41: fastening bolt

42: eye nut 50: sealing member

Example 3

10: fluid carrier 130: overflow recovery tube

200: housing 250: chamfer

300: MBR 310: membrane unit

320: air diffuser unit 400: bubbler

410 mesh screen

Example 4

100: aerobic tank 110: supply pipe

111, 112: gauges 113, 114: valves

120: drain pipe 130: overflow recovery pipe

200, 202: housing 220: filtered water discharge pipe

Embodiments of the present invention as described above will be described in detail with reference to the accompanying drawings.

<Example 1>

In Example 1, a hybrid water treatment apparatus capable of selectively applying a filtration method of a membrane module according to a change in filtered water production flow rate is provided.

The membrane module is provided in a form immersed in the MBR tank, by using the filtration characteristics of the membrane to filter the solids contained in the raw water to produce the filtered water. The filtration process by the membrane module is usually carried out by gravity or pump type. Gravity type is the method of filtering by using the head difference between the raw water and the membrane module in the MBR tank, pump type is a method of producing the filtered water using a pump provided on the filtered water discharge side of the membrane module.

On the other hand, the membrane is fouling (fouling) increases as the operation progresses, the filtration efficiency is lowered, the decrease in filtration efficiency means a decrease in the filtered water production flow rate of the membrane. As mentioned above, the filtration process of the membrane module is operated by gravity or pump type. When the pump type is operated, a constant pressure is applied regardless of the increase in the membrane differential pressure or the decrease in the filtrate production flow as described in the Background Art. In this way, it is difficult to maintain the filtered water production flow at a certain level. In addition, despite the increase in the membrane differential pressure due to fouling or the like, as a constant pressure is applied to the separator, a pressure that is substantially applied to the separator increases, thereby causing a problem that the separator is broken.

In Example 1, a water treatment apparatus capable of selectively applying a hybrid filtration process to apply a gravity filtration process or a gravity filtration process and a pump filtration process at the same time in response to a change in the filtered water production flow rate is provided.

With reference to the drawings will be described in detail a hybrid water treatment apparatus according to a first embodiment of the present invention.

1 is a block diagram of a hybrid water treatment device according to the present invention, FIG. 2 is a block diagram of a hybrid water treatment device according to the present invention, and FIG. 3 is a plan view of a hybrid water treatment device according to the present invention.

Referring to Figure 1, the water treatment apparatus according to the present invention comprises an aerobic tank 10 and the MBR tank (100).

The aerobic tank 10 serves to convert ammonia nitrogen contained in raw water into nitrate nitrogen under aerobic conditions. The MBR tank 100 is provided at the rear end of the exhalation tank 10 to receive the raw water treated by the exhalation tank 10, and to filter the solids and the like contained in the raw water using the membrane module 121. Do it. The MBR tank 100 may be provided in plural, in which case the exhaled raw water of the aerobic tank 10 is supplied in an upward flow through the bottom of each MBR tank 100.

The MBR tank 100 is configured in detail, including a reaction tank and the MBR (120). The reactor provides a mounting space of the MBR 120 and provides a space in which the filtration process by the MBR 120 proceeds, and the MBR 120 is provided in the reactor and is supplied from the aeration tank 10. To filter the solids contained in the raw water.

The MBR 120 may include a plurality of separator modules 121, and an air diffuser 122 may be provided at a lower end of the plurality of separator modules 121 to supply air to the separator module 121. The separator applied to the separator module 121 may be composed of a flat membrane or a hollow fiber membrane.

One side of the separation membrane module 121 is provided with a filtered water discharge pipe 123 through which the filtered water filtered by the separation membrane is discharged. The filtered water filtered by the separation membrane is stored in a filtered water tank (not shown) via the filtered water discharge pipe 123.

In the filtration process by the MBR 120, the production flow rate of the filtered water produced by the membrane module 121 is measured in real time, and the method of the filtration process is determined according to the measured filtered water production flow rate. In the present invention, the method of the filtration process means a method in which a gravity filtration process or a gravity filtration process and a pump-type filtration process are mixed, and a gravity filtration process or a gravity filtration process and a pump is performed according to the fluctuation of the filtrate production flow rate. The filtration process proceeds in a manner that mixed filtration process is used.

To this end, as shown in FIG. 2, one side of the filtrate discharge pipe 123 is provided with a filtrate flow meter 220 for measuring the flow rate of the filtrate passing through the filtrate discharge pipe 123 and one end of the filtrate discharge pipe 123. It is provided with a filtered water pump 124 for discharging the filtered water generated by the separation membrane to the filtered water tank. In addition, one side of the MBR tank 100 determines whether the measured filtrate flow rate satisfies a predetermined reference flow rate and controls the operation of the filtrate pump 124 according to whether the measured filtrate flow rate meets the reference flow rate. The control device 210 is provided.

Under such a configuration, the control device 210 operates the filtrate pump 124 when the filtrate flow rate measured by the flowmeter 220 is less than the reference flow rate, and the measured filtrate flow rate meets or exceeds the reference flow rate. If above, the operation of the filtered water pump 124 is stopped.

On the other hand, MBR tank 100 according to the present invention is basically operated by gravity filtration process. Accordingly, if the measured filtrate flow rate is greater than or equal to the reference flow rate, the filtrate pump 124 does not operate and only the gravity filtration process proceeds. If the measured filtrate flow rate is less than the reference flow rate, the gravity filtration process proceeds and the filtrate pump 124 ), The pump type filtration process proceeds. That is, if the measured filtrate flow rate is greater than or equal to the reference flow rate, the gravity filtration process is performed. If the measured filtrate flow rate is less than the standard flow rate, the gravity filtration process and the pump type filtration process are simultaneously performed.

In setting the standard flow rate for the filtered water flow rate, the temperature of the raw water should be taken into consideration, and as the temperature of the raw water increases as the temperature of the raw water increases, it is desirable to increase the filtered water flow rate. In one embodiment, the filtrate flow rate may be set to 20 Lmh if the temperature of the raw water is 15 ℃, 40 Lmh may be set if the temperature of the raw water, 30 ℃.

As such, even though the filtered water production flow rate of the separation membrane is decreased due to the fouling of the separation membrane, as the pump type filtration process proceeds in parallel with the gravity filtration process, it is possible to maintain a constant level of the filtered water production flow rate.

In the above, the structure which can selectively apply the method of a filtration process according to the fluctuation | variation of the filtration water production flow was demonstrated. On the other hand, the present invention proposes a configuration for implementing the optimal filtration process and washing process of the MBR tank 100 in addition to the selective application of the above-described filtration process method.

In order to optimize the filtration process of the MBR tank 100, the concentration of mixed liquor suspended solids (MLSS) of the aerated raw water supplied from the aerobic tank 10 must be controlled to an appropriate level, and the concentrated sludge in the MBR tank 100 is It should be kept at a certain level.

To this end, one side of the raw water supply pipe 11 for supplying the exhaled raw water to the MBR tank 100 or in the MBR tank is provided with a suspended solids measuring sensor 230 for measuring the MLSS concentration of the exhaled raw water, One side of the filtered water discharge pipe 123 is provided with a differential pressure gauge 240 for measuring the membrane differential pressure of the membrane. Under such a configuration, the control device 210 controls the flow rate of the exhaled raw water according to the MLSS concentration measured by the suspended matter measuring sensor 230. Specifically, when the measured MLSS concentration is less than the predetermined reference concentration, the inflow of raw water is reduced, and when the measured MLSS concentration is larger than the preset reference concentration, the inflow of raw water is increased. On the other hand, the differential pressure gauge 240 continuously measures the membrane pressure difference of the membrane, the control unit 210 discharges all the concentrated sludge in the MBR tank 100 when the membrane pressure difference of the membrane exceeds a preset reference differential pressure It controls so that it may be conveyed to the aerobic tank 10. Here, the suspended matter measuring sensor 230 may be provided in the aerobic tank 10 or the MBR tank 100.

The inflow of raw water is selectively controlled according to the MLSS concentration of aerobic raw water, and the concentrated sludge is selectively discharged and returned according to the membrane pressure of the separator, thereby improving the efficiency of the filtration process. For reference, apart from being returned to the aeration tank 10 of the concentrated sludge, a part of the concentrated sludge (for example, 1.2 to 2.5%) in the MBR tank 100 is transferred to the MBR tank 100 through a concentrated sludge outlet (not shown). ) It is drawn out and discarded.

On the other hand, the membrane pressure difference of the membrane measured by the differential pressure gauge 240 is also used as a criterion for determining whether the washing process is in progress. In one embodiment, when the membrane differential pressure of the membrane is greater than the predetermined washing differential pressure, the control device 210 may control the MBR tank 100 to stop the filtration process and proceed with the washing process. During the washing process, the water level in the MBR tank 100 is in one embodiment lower than the water level of the filtration process, it is preferable to maintain at a level 1/3 of the water level of the filtration process, convection is actively proceeded at this water level.

On the other hand, a coagulant supply device 113 may be further provided on one side of the MBR tank 100 to remove the phosphorus component contained in the exhaled raw water, PAC, ALUM through the coagulant supply device 113 A flocculant, such as this, can be supplied to the MBR tank 100. The flocculant supply device 113 may be composed of a flocculant storage tank, a flocculant supply pump, a line mixer, and the like. In addition, one side of the MBR tank 100 may be further provided with an overflow recovery pipe 112 for recovering the over-supply aerobic raw water to the aerobic tank 10.

In addition, the upper portion of the MBR tank 100 is provided with an MBR tank cover 270 or an air supply / exhaust device (not shown) to block sludge odor outflow, and sludge inside the reaction tank of the MBR tank 100. Sludge convection movement path plate 111 is provided to facilitate the convection movement of the sludge convection movement path plate 111 is disposed in the vertical direction on the side of the reactor (see Fig. 3).

In addition, a sludge leak sensor 260 is provided at one side of the filtered water discharge pipe 123. When the sludge is discharged by being included in the filtered water due to breakage or breakage of the membrane module 121, the sludge leak sensor 260 detects this, and the control device 210 in the filtered water by the sludge leak sensor 260. When the sludge is detected, the operation of the filtrate pump 241 is stopped or the filtrate valve 250 is blocked.

In addition, the one side of the MBR tank is provided with the overflow water discharge pipe for gravity filtration process and the overflow water discharge pipe for pump type filtration process independently.

<Example 2>

In the present Example 2, a configuration in which self-cleaning is optimized without withdrawing the MBR, a detailed configuration of the withdrawal and storage for installation and removal of the MBR, and an optimized sealing configuration of the housing are presented.

4 is a configuration diagram of a washing system of a water treatment device according to the present invention.

Referring to the drawings, the water treatment apparatus according to the present invention includes a housing 10 having a door 11, an MBR 20 disposed inside the housing 10, and the MBR 20 in the housing 10. Conveying means 30 for drawing out and receiving, and fastening means 40 for fastening the door 11 to the housing 10.

It is well known that such a water treatment device is used to purify waste water which is transferred from the aerobic tank 1 and supplied to the housing 10, and the water treatment by the MBR 20 is performed in the housing 10. When the MBR 20 itself is contaminated, the MBR 20 is cleaned.

In order to clean the MBR 20, the water treatment apparatus according to the present invention is driven when the MBR 20 itself is contaminated so that the cleaning driving unit 2 is connected to the housing 10 to clean the MBR 20. Is installed.

The washing driving unit 2 includes a washing water supply unit 4, a pump 5, and a controller 6.

The washing water supply unit 4 is a source of washing water, and is applied as a supply source using a water pipe, or a supply source for supplying a certain amount of washing water if necessary after storing a constant amount of water in the storage tank 7. Can be applied as In particular, the washing water supply unit 4 is configured to include a washing water supply line (3) to allow the washing water to proceed to the housing (10).

In this case, the washing water means that the common water or the membrane filtration water and the cleaning chemical are mixed, and the washing water is supplied to the washing water supply line 3 for cleaning as shown in FIG. Can be supplied.

Alternatively, the cleaning chemicals may be introduced into the storage tank in which the constant is stored to form the washing water in advance, or at the same time as supplying the constant to the housing 10 and forming a separate chemical liquid supply line into the housing 10. You can also supply cleaning chemicals.

In the figure, reference numeral 8 denotes a chemical liquid supply line, and reference numeral 9 denotes a chemical liquid tank in which cleaning chemicals are stored.

The pump 5 is installed in the washing water supply unit 4 and the washing water supply line 3 of the housing 10 to advance the washing water to the housing 10. Is appropriately selected corresponding to the standard of the water treatment apparatus.

The controller 6 is electrically connected to the pump 5 to control the supply of the washing water and the control of the drainage, and the amount and timing of the washing water supply. Such a controller 6 is interlocked with the entire system for driving the water treatment device to determine the time of cleaning of the MBR 20 to control and control the cleaning drive.

5 is a flow chart of the water treatment process of the water treatment apparatus according to the present invention.

Referring to the drawings, in the water treatment process of the water treatment apparatus, when wastewater is received from the aerobic tank 1 into the housing 10, the MBR 20 inside the housing 10 is driven to drive the water treatment. )

If contaminants are gradually attached to the surface of the MBR 20 as time passes during the driving of the water treatment, the filtration pressure of the MBR 20 is increased.

The increase in the filtration pressure of the MBR 20 inside the housing 10 is a cleaning point of the MBR 20. To this end, the controller 6 drives the washing water supply unit 4 to supply the washing water into the housing. After that, (S30) the MBR 20 is driven to perform the cleaning drive. (S40)

At this time, the cleaning time can be set by the controller 6 at a predetermined number of times or a predetermined number of times per unit time, or by the MBR 20 filtration pressure setting. In addition, the cleaning is circulated in accordance with the air flow of the MBR (20) air diffuser 21 in the housing 10, and the series of water that is drained after continuously cleaning the surface of the MBR (20) (S50) You have a cycle.

Thereafter, when the cleaning is completed according to the preset time, number of times, or the filtration pressure of the MBR 20, the controller 6 cuts off the supply of the washing water, and the waste water is supplied from the exhalation tank 1 to perform the water treatment process. do.

Figure 6 is an open state perspective view of the water treatment apparatus according to the present invention, Figure 7 is a sealed state perspective view of the water treatment apparatus according to the present invention, Figure 8 is a side view of the water treatment apparatus according to the present invention, Figure 9 is a water treatment according to the present invention An illustration of the state of use of the device. 10 is an enlarged perspective view of the fastening means of the water treatment apparatus according to the present invention, and FIG. 11 is an enlarged cross-sectional view of the fastening means of the water treatment apparatus according to the present invention.

Referring to the drawings, the water treatment apparatus has an opening 12 formed in the lateral direction of the housing 10 to draw out and receive the MBR 20 horizontally from the housing 10. Here, the opening 12 is formed with a space area for the MBR 20 to enter and exit.

In addition, the housing 10 includes a door 11 for opening and closing the opening 12, the door 11 having a surface area of at least larger than the space area of the opening 12 in the form of a panel. It is natural to be formed.

The MBR (20) is a configuration using a membrane in place of the sedimentation tank used as the final treatment step of the existing biological treatment process, the MBR (20) maintains the high microbial concentration in the reactor to improve the treatment efficiency of organic matter, nitrogen components, etc. Elevation is as well known.

The transfer means 30 is configured to include an inner rail 31 installed on the bottom surface of the inner space (S) of the housing (10). At this time, the inner rail 31 is a configuration for sliding the MBR 20 is mounted in the direction of the open portion 12 in the housing 10.

In addition, the transfer means 30 is disposed outside the housing 10 to further transport the MBR 20 horizontally transferred by the inner rail 31 to draw out the MBR 20 to the outside, or In order to transfer to the inner rail 31 by transporting the MBR 20 is completed, such as cleaning or maintenance.

To this end, the transfer means 30 is composed of an outer rail 32, the moving cart 33.

The outer rail 32 is positioned at a height corresponding to the upper surface of the inner rail 31 (the same height in the drawing), is disposed in the same length direction as the longitudinal direction of the inner rail 31.

The moving cart 33 is fixed to the outer rail 32 is mounted, is configured to move the MBR 20 to the desired point when the MBR 20 is transferred to the outer rail (32).

In the figure, reference numeral 34 denotes a caster for the movement of the moving trolley 33, and reference numeral 35 denotes a handle for the operator to move the moving trolley 33.

The fastening means 40 includes a plurality of fastening means outside the opening 12 of the housing 10 to fix the door 11 after the door 11 seals the opening 12 of the housing 10. The fastening means 40 is installed. To this end, the fastening means 40 is composed of a fastening bolt 41, the eye nut 42.

The fastening bolt 41 is coupled to the housing 10 and formed to have a length for penetrating the door 11. In particular, the fastening bolt 41 is hingedly coupled to the housing 10 is installed so as to rotate angularly.

At this time, the through-hole through which the fastening bolt 41 of the door 11 penetrates as the fastening bolt 41 is rotated angularly is opened outward so that the fastening bolt 41 can be angularly rotated and fitted. Grooves 13 are formed.

The eye nut 42 closely attaches the door 11 to the opening 12 of the housing 10, and then rotates the fastening bolt 41 to the fastening groove 13 to be inserted into the fastening groove 13, and the fastening groove 13. After being inserted into the screw is screwed to the end of the protruding fastening bolt (41) to close the door 11 to the opening 12 of the housing 10 to seal the interior space (S) of the housing (10).

In this way, the fastening bolts 41 are installed in the housing 10 and the eye nuts 42 are fastened to eliminate damage of the fastening bolts themselves (breakage of the bolt head generated when the bolts are fastened). Due to the characteristics of the eye nut 42, screwing with the fastening bolt 41 can be performed more conveniently.

In addition, the door 11 as described above is formed in a considerable weight when the size of the housing 10 is enlarged, so that either side of the left or right side is hinged (hinging) with the housing 10 to be configured in a swinging manner. It may be.

In the above-described configuration, the door 11 has a sealing member 50 coupled to the surface in close contact with the opening 12 of the housing 10.

Here, the sealing member 50 may be formed in the shape of a rubber ring in the form of a rectangular frame at the point of contact of the opening 12 and the door 11 of the housing 10, but in order to obtain a more excellent sealing efficiency The sealing member 50 is applied to a rubber sheet of a single area which is at least larger than the opening area of the opening 12.

<Example 3>

In Example 3, the cleaning ball or the fluid carrier collides with the surface of the separator to present a constitution of a physical washing process to remove contaminants.

Figure 12 is an enlarged view of the main part showing the configuration using the washing ball in the water treatment apparatus according to the present invention.

Referring to the drawings, the water treatment apparatus is provided with a chamfer 250 at a predetermined inclination angle along the bottom edge of the housing 200. According to this structure, the cleaning ball or the fluid carrier 10 in physical contact with the surface of each separator of the membrane unit 310 is prevented from gathering at the edge of the bottom edge to prevent the cleaning ball or the fluid carrier 10 from being collected. It can be used efficiently, thus reducing fouling.

In detail, the washing ball or the fluid carrier 10 is swept away by the air bubbles rising from the air diffuser unit 320 and ascends into the separator unit 310 to descend largely convex to the outside of the MBR 300. At this time, the convection force is hardly applied to the bottom edge edge of the housing 200, so that the washing ball or the fluid carrier 10 located in this portion does not convection but only stops or rotates locally. As a result, the efficiency of use decreases.

Accordingly, the inclined chamfer 250 is installed in this portion, and as shown by the arrow in FIG. 12, the washing ball or the fluid carrier 10 moves along the inclination of the chamfer 250 to the lower portion of the diffuser unit 320. Pulled in. In this case, the chamfer 250 may be attached to a separate inclined plate by welding or the like, or may be integrally formed with the housing 200.

On the other hand, inside the housing 200, a mesh screen (410) formed with a hole having a predetermined size is installed adjacent to the inlet of the overflow recovery pipe 130 for transferring the excess sludge to the aerobic tank so that the sludge is overflow overflow pipe Preventing the flushing of the washing ball or the fluid carrier 10 when discharged through the 130 may increase the use efficiency of the washing ball or the fluid carrier 10 to reduce fouling.

Also, in order to prevent the cleaning ball or the fluid carrier 10 from being attached to the mesh screen 410 to prevent sludge discharge, the bubbler 400 may be attached to the bottom of the mesh screen 410 to prevent the sludge from being discharged. Air bubbles released from 400 may cause the wash ball or flowable carrier 10 to be separated from the mesh screen 410.

As described above, the manner of the present embodiment using the washing ball or the fluid carrier may be implemented in combination with the above-described Examples 1 and 2.

<Example 4>

In Example 4, an MBR is accommodated in each independently configured housing so that a water treatment can be performed without stopping the entire process while washing one MBR.

13 is an overall configuration diagram showing a configuration in which a plurality of independent housings of the water treatment apparatus according to the present invention are installed.

Referring to the drawings, the housings 200 and 202 are provided in plural numbers (two in the drawing, which can be enlarged according to water treatment capacity), and are separately partitioned and installed in each of the housings 200 and 202. The MBR is installed.

In this case, each of the housings 200 and 202 is configured to receive water from the aerobic tank 100 through the supply pipe 110 and to receive the water therein, and the supply pipe 110 includes various pipes for controlling supply. And it is natural that the valves 111 and 112 are installed, and the valves 113 and 114 are installed at positions connected to the housings 200 and 202.

As the water treatment apparatus is well known, when the water supplied through the aerobic tank 100 is filtered by the MBR, the filtered water is discharged through the filtered water discharge pipe 220, and the unfiltered water is overflowed with the overflow recovery pipe 130. It is recovered to the aeration tank 100 through the drain pipe 120. That is, in the water treatment process, the entire water supplied from the aeration tank 100 to the housings 200 and 202 is discharged to the outside when filtered by the MBR to obtain the desired filtered water, and the unfiltered water is the aeration tank 100. To form a cycle to be fed back into the housings 200 and 202 and continuously filtered.

As such, the water treatment apparatus in which the MBRs are accommodated in the plurality of independent housings 200 and 202 does not interfere with the operation of the other MBRs even if one MBR is withdrawn from the housings 200 and 202. Only the corresponding MBR can be cleaned without affecting it.

In the present embodiment, the housings 200 and 202 are illustrated as being disposed in a plurality of numbers, but may be configured by being divided into a plurality of independent spaces (each space is kept in a closed state) in a single housing. It is to be noted that the independent space is to perform a separate housing function.

The configuration of this embodiment to which the plurality of independent water treatment configurations are applied can be applied in combination with Embodiments 1 to 3 described above.

Claims (20)

Hogi-jo, which induces nitrification of raw water; And an MBR bath provided at the rear end of the aerobic tank and filtering raw water through a gravity filtration process using a water head difference between the raw water and the membrane module while using a membrane module. The MBR tank, A filtrate discharge pipe provided at one side of the membrane module and discharging the filtrate filtered by the membrane, a filtrate flow meter provided at one side of the filtrate discharge pipe and measuring a filtrate flow rate passing through the filtrate discharge pipe, and at one end of the filtrate discharge pipe And a filtrate pump for discharging the filtrate generated by the separation membrane into the filtrate tank, and determining whether the filtrate flow rate measured by the filtrate flow meter satisfies a preset standard flow rate and whether the filtrate flow rate measured is met. And a control device for controlling the operation of the filtrate pump, wherein the control device operates a filtrate pump when the amount of filtrate flow rate measured by the flowmeter is less than a reference flow rate, so that a pump type filtration process is performed. If the measured filtrate flow rate is above the standard flow rate, The operation stops, and if the measured filtrate flow rate is more than the standard flow rate, the gravity filtration process is performed. If the measured filtrate flow rate is less than the standard flow rate, the external filtration type is characterized in that the gravity filtration process and the pump type filtration process are performed at the same time. Water treatment device using MBR. According to claim 1, Raw material supply pipe for supplying the exhaled raw water of the aerobic tank and the floating material measuring sensor for measuring the MLSS concentration of the aerobic raw water provided on one side of the raw water supply pipe or provided in the MBR tank More is provided, The controller may reduce the inflow of raw water if the measured MLSS concentration is less than the preset reference concentration, and increase the inflow of raw water if the measured MLSS concentration is greater than the preset reference concentration. Used water treatment device. According to claim 1, One side of the filtered water discharge pipe is further provided with a differential pressure gauge for measuring the membrane pressure difference of the membrane, The control device is a water treatment device using an external housing-type MBR characterized in that if the membrane differential pressure of the separation membrane exceeds a predetermined reference differential pressure to discharge all the concentrated sludge in the MBR tank to be returned to the aerobic tank. According to claim 1, One side of the filtered water discharge pipe is further provided with a differential pressure gauge for measuring the membrane pressure difference of the membrane, The control device stops the filtration process when the membrane differential pressure of the membrane is greater than the predetermined washing differential pressure and controls the MBR bath so that the washing process proceeds, and the water level in the MBR bath during the washing process is 1/3 of the level of the filtration process. Water treatment device using an external housing type MBR, characterized in that maintained at the level. The method of claim 1, wherein a flocculant supply device is further provided on one side of the MBR tank to remove the phosphorus component contained in the exhaled raw water, the flocculant is supplied to the MBR tank through the flocculant supply device Water treatment device using external housing type MBR. The water treatment apparatus according to claim 1, wherein the exhaled raw water of the aerobic tank is supplied upward through the bottom of the MBR tank. According to claim 1, wherein the sludge convection movement path plate is provided in the reaction tank of the MBR tank to facilitate the convection movement of the sludge, the sludge convection movement path plate is disposed in the vertical direction on the side of the reactor outer housing Water treatment device using type MBR. The water treatment apparatus using an external housing type MBR according to claim 1, wherein an MBR tank cover for blocking sludge odor outflow is provided on the upper portion of the MBR tank, or an air supply / exhaust device is provided. According to claim 1, wherein the sludge leak sensor is provided on one side of the filtered water discharge pipe, when the sludge is discharged included in the filtered water due to breakage or breakage of the membrane module, the sludge leak sensor detects this, the control device is sludge When the sludge in the filtrate is detected by the leak sensor, the water treatment device using an external housing type MBR to stop the operation of the filtrate pump or block the filtrate valve. The water treatment apparatus using an external housing type MBR according to claim 1, wherein the overflow water discharge pipe for the gravity filtration process and the overflow water discharge pipe for the pump type filtration process are independently provided on one side of the MBR tank. In the water treatment apparatus installed in the housing so that the waste water supplied from the exhalation tank is treated by the MBR to discharge the waste water, The water treatment apparatus using an external housing type MBR is installed in the housing to which the water treatment by the MBR is performed is connected to a cleaning driving unit which is driven when the MBR itself is contaminated to clean the MBR. The method of claim 11, wherein the cleaning driving unit A washing water supply unit which is a supply source of washing water composed of water and washing chemicals, and includes a washing water supply line for allowing the washing water to proceed to the housing; A pump installed at the washing water supply unit and the washing water supply line of the housing to advance the washing water to the housing; And a controller electrically connected to the pump to control the supply and drainage of the washing water and the amount of the washing water supplied and the time of supply of the washing water. In the water treatment apparatus is provided with an opening in the lateral direction to draw out and receive the MBR horizontally, and having a door for opening and closing the opening, An inner rail installed at a lower portion of the inner space of the housing and mounted on the MBR to slide in the direction of the opening in the housing; Is disposed outside of the housing, the outer rail is provided with the upper surface to be arranged at a height corresponding to the upper surface of the inner rail for the MBR slide transfer, the MBR conveyed by the inner rail is further conveyed by the outer rail to horizontally MBR Water treatment apparatus using an external housing-type MBR comprising a; transfer means to be withdrawn. The method of claim 13, wherein the transfer means An outer rail having an upper surface positioned at a height corresponding to an upper surface of the inner rail and disposed in the same longitudinal direction as the longitudinal direction of the inner rail to move the MBR out of the housing; The external rail is mounted and fixed so that the moving bogie to move the MBR to a desired point when the MBR is transferred to the external rail; Water treatment apparatus using an external housing type MBR comprising a. The method of claim 11 or 13, wherein the housing A plurality of fastening means are installed on the outside of the opening to fix the door after the door is closed, and the fastening means is coupled to the housing to the fastening bolt penetrating the door and the fastening bolt penetrating the door. Water treatment device using an external housing-type MBR characterized in that it comprises an eye nut screwed to close the door to the housing. The method of claim 15, wherein the fastening bolt It is hinged to the housing and installed to rotate at an angle, and a fastening groove formed by opening outward is formed at a point through which the fastening bolt of the door penetrates. The door is closely attached to the opening of the housing, and then the fastening bolt is inserted into the fastening groove. Water treatment device using an external housing-type MBR, characterized in that the nut is configured to be fastened. The method of claim 15, wherein the door Sealing member for sealing the inner space of the housing is coupled to the surface in close contact with the opening of the housing, the sealing member is an outer housing type MBR characterized in that applied to the rubber plate material of a single area larger than at least the opening area of the opening. Water treatment device using the. In a water treatment apparatus in which an MBR provided with an air disperser unit for generating air bubbles below the separation membrane unit is housed and disposed in a housing, and the waste water supplied from an exhalation tank is treated by water and discharged by an MBR. When the washing ball or the fluid carrier is introduced into the housing to wash the MBR, the washing ball or the fluid carrier is sprayed together with the air bubbles by the air diffuser unit to contact the separation membrane to detach the contaminants of the separation membrane. A chamber having an inclination angle is formed at the bottom edge of the housing so that the washing ball or the fluid carrier which is convection in the housing is configured to proceed to the lower side of the diffuser unit without remaining at the edge of the housing. Water treatment device. The method of claim 18, An overflow recovery pipe for transporting excess sludge to an aerobic tank is formed inside the housing, and a mesh screen having a hole formed at least smaller than a washing ball or a fluid carrier is installed at an inlet of the overflow recovery pipe so that the sludge is overflowed. It is configured to prevent the flushing of the washing ball or the fluid carrier with the discharge when discharged through, A bubbler is installed at the bottom of the mesh screen to prevent the washing ball or the fluid carrier from adhering to the mesh screen by the air bubbles generated and raised by the bubbler so that the cleaning ball or the fluid carrier does not interfere with the sludge discharge. Water treatment apparatus using an external housing-type MBR, characterized in that configured. In the water treatment apparatus installed in the housing so that the waste water supplied from the exhalation tank is treated by the MBR to discharge the waste water, The housing may be provided in plural or a plurality of independent spaces may be partitioned and installed in a single housing, and an MBR may be disposed in each of the housings or the independent spaces. Pipes for receiving the supply is configured to each of the water treatment apparatus using an external housing-type MBR characterized in that the cleaning air supply line is installed and configured respectively.

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