KR102055267B1 - One tank type wastewater treatment apparatus - Google Patents

Abstract

The present invention relates to a single tank type wastewater treatment apparatus which comprises: a first tank in which an internal space is formed to introduce raw water, and which separates oil and water included in the raw water; a second tank which is placed inside the first tank and has an inlet pipe formed at one side thereof in order to introduce the raw water where the oil and the water are separated in the first tank, and an outlet formed in the lower part thereof in order to discharge condensed solids; a water purification unit which is placed inside the second tank and purifies the raw water introduced to the second tank after separating the oil and the water; a coagulant injection unit which injects the coagulant for condensing the raw water where the oil and the water are separated, into the inside of the second tank; a purified water discharge unit which is connected to the water purification unit and sucks or discharges the purified water purified by the purification unit; a precipitation unit which is placed in the lower part of the first tank and in which the solids discharged through the outlet are deposited; and a solid discharge unit which is connected to the precipitation unit and discharges the solids deposited in the precipitation unit to the outside. The present invention can prevent fouling on the surface of a membrane.

Description

One tank type wastewater treatment apparatus

The present invention relates to a wastewater treatment apparatus of a single tank type, and more particularly, to a single tank to prevent the fouling on the surface of the membrane while at the same time to the oil and water separation and flocculation reaction sedimentation separation of the raw water It relates to a wastewater treatment device of the type.

In the existing wastewater treatment process, MBR (Membrane Bio) is a combination of a biological treatment process to remove organic matter, TN and TP components, and a membrane filtration process to remove particulate matter. Reactor method is generally used.

The MBR process uses a membrane module that selectively passes one or more of the mixed components to separate the workpiece from the treated water.

Examples of the membrane module include a hollow fiber membrane module, a flat plate module, a spiral wound membrane module, and a tubular membrane module. In particular, in the MBR method, the hollow fiber membrane module is mainly used for the convenience of cleaning. Here, the hollow fiber membrane module excludes a material larger than the micropore size from a liquid in which various substances are mixed by using a hollow fiber membrane, which is a thin fiber having a myriad of small micropores on the surface and having empty center spaces, It means a device that can selectively recover only small substances.

However, such a hollow fiber membrane module attempts to reduce costs by excessively increasing the area of the membrane in order to spread more, and as the distance between the hollow fibers of one module increases, fouling between the membranes occurs, causing cleaning. There is a problem that the efficiency is lowered. In addition, as the cleaning efficiency is lowered, there is a problem in that the filtration life of the membrane module is shortened.

In order to solve this problem, like the membrane water treatment device having an air discharge device disclosed in Republic of Korea Patent Publication No. 10-1332684, through the air discharge device for discharging the air accumulated in the header pipe to prevent deterioration of cleaning efficiency It is true.

However, in the case of using the air discharge device as described above, since the generated air circulates in the reaction tank, the separated processed object is suspended and resorbed to the surface of the membrane, thereby causing a problem in that the treatment efficiency is lowered.

In addition, the re-adsorption on the surface of the membrane, there is a problem that the treatment capacity is lowered, so that the replenishment of the membrane and the exchange of the membrane occurs frequently, resulting in high maintenance costs.

Republic of Korea Patent No. 10-1332684 (November 19, 2013)

The present invention has been proposed in order to solve all the problems occurring in the prior art as described above, and in order to prevent the fouling on the surface of the membrane while at the same time the oil and water separation and flocculation reaction sedimentation separation of the raw water. It is to provide a single tank type wastewater treatment apparatus.

Another problem to be solved by the present invention is to provide a single tank type wastewater treatment apparatus to prevent the object to be separated from the reaction tank by the air to be resorbed to the surface of the membrane.

In order to achieve the above object, a single tank type wastewater treatment apparatus according to the present invention is formed with an internal space so that the raw water is introduced, the first tank for separating the oil water (油水) contained in the raw water; A second tank provided inside the first tank and having an inflow pipe for introducing raw water separated from the first tank, and having a discharge port at a lower portion thereof to discharge the aggregated solids; A refining unit provided inside the second tank and purifying the raw water introduced into and separated from the oil water into the second tank; A coagulant injecting unit for injecting a coagulant for flocculating the separated raw water into the second tank; A purified water discharge unit connected to the purification unit and configured to suck and discharge purified water purified by the purification unit; A precipitation unit provided at a lower portion of the first tank and for depositing the solids discharged through the discharge port; And a solid discharge portion connected to the precipitation portion and discharging the solid matter precipitated in the precipitation portion to the outside.

As described above, according to the waste water treatment apparatus in the form of a single tank according to the present invention, it is possible to prevent fouling from occurring on the surface of the membrane and to prevent the object from being resorbed to the membrane. This can reduce manpower and chemical costs and minimize the shortening of the membrane due to frequent cleaning.

1 is a schematic configuration diagram of a single tank type wastewater treatment apparatus according to the present invention.
Figure 2 is an exemplary view showing a plan view of the waste water treatment apparatus of the single tank type according to the present invention.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings that describe exemplary embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, in the following description with reference to the accompanying drawings, the same or corresponding components will be given the same reference numerals and duplicate description thereof will be omitted. do.

1 is a schematic configuration diagram of a single tank type wastewater treatment apparatus according to the present invention, Figure 2 is an exemplary view showing a plan view of a single tank type wastewater treatment apparatus according to the present invention.

Referring to Figure 1, the wastewater treatment apparatus in the form of a single tank according to the present invention is intended to prevent the water surface separation and flocculation sedimentation separation of the raw water at the same time, and prevent the surface of the membrane from being blocked by the treated water. , First tank 10, second tank 20, water purification unit 30, coagulant input unit 40, purified water discharge unit 50, settling unit 60 and solids discharge unit 70 do.

The first tank 10 has an internal space formed so that the raw water flows in, and serves to separate the flowing water contained in the raw water.

Specifically, the first tank 10 is formed in a cylindrical shape with an open upper portion, and raw water flows into the inside through a pipe and a pipe of the pump from the outside. Here, the raw water introduced into the first tank 10 may be any one of industrial wastewater and domestic wastewater.

After the raw water is introduced into the first tank 10, oil and water are separated by its own weight. In other words, oil is separated by the principle that oil rises up and water sinks down.

At this time, the oil separated in the first tank 10 can be removed later by the operator. On the other hand, the water separated in the first tank 10 flows into the second tank 20 through the inlet pipe 21.

The second tank 20 is provided inside the first tank 10, and an inflow pipe 21 for introducing raw water separated from the first tank 10 is formed at one side. The second tank 20 has an outer diameter formed in a shape corresponding to the inner diameter of the first tank 10 and is provided inside the first tank 10. In addition, similar to the first tank 10, the second tank 20 may be formed in a cylindrical shape with an open top.

On the other hand, the inlet pipe 21 formed on one side of the second tank 20 serves to guide the raw water separated from the first tank 10 to the inside of the second tank 20, the raw water separated from the oil It can be composed of a general pipe formed to have a sufficient diameter to pass through.

On the other hand, the inlet pipe 21 is preferably provided on the lower side of the second tank (20). This is because the inlet pipe 21 is located on the lower side of the second tank 20, so that the raw water smoothly penetrates into the inlet pipe 21 by using the natural energy caused by the potential energy due to gravity or water pressure. To do that.

In addition, the lower portion of the second tank 20 is provided with a discharge port 22 to discharge the aggregated solid matter. Here, the aggregated solids are aggregated due to the flocculant introduced by the flocculant inlet unit 40 which will be described later. The sedimented solid water is precipitated in the lower portion of the second tank 20 by its own weight.

The second tank 20 may be formed in a hopper shape so that the aggregated solids (hereinafter, solids) as described above may be smoothly discharged. For this reason, the solid may be smoothly discharged to the precipitation unit 60 to be described later.

In addition, the second tank 20 is provided with a water purification unit 30 for purifying the raw water introduced by separating the flow of water from the first tank 10.

The water purification unit 30 includes a support member 31, an elastic member 32, a frame portion 33, and a membrane 34.

Support member 31 is installed spaced apart from the bottom surface of the second tank (20). For example, the supporting member 31 is formed in a lattice form, as shown in FIG. 2, so that each end may be installed on the lower inner wall of the second tank 20. However, this is only an example, and the second tank 20 may be installed in various ways such as installing a plurality of frames perpendicular to the bottom surface of the second tank 20, and installing a supporting member 31 at the ends of the plurality of frames. It can be installed spaced apart from the bottom surface.

The supporting member 31 is positioned below the frame portion 32 to which the membrane 33 is coupled. Accordingly, it serves to support the frame portion 32 provided on the upper portion.

The elastic member 32 is supported on the upper portion of the support member 31. The elastic member 110 may be made of any one of a spring or a vibrator. Detailed description of the elastic member 32 will be described later.

The frame part 33 is provided above the elastic member 32 to vibrate by the elastic member 32. The frame part 33 is formed in a frame shape, and a plurality of membranes 34 are provided therein.

In this case, the frame part 33 may be formed in a rectangular frame shape, for example, but the present invention is not limited thereto. That is, the frame part 33 may be formed in various shapes such as a hexagonal frame as well as a rectangular frame shape.

Therefore, as the frame part 33 is formed in the form of an open frame, the raw water separated from the water flows into the plurality of membranes 34 provided therein.

Here, the plurality of membranes 34 provided in the inside of the frame part 33 serves to purify the raw water introduced into the second tank 20 by flowing oil. The membrane 34 may be made of a hollow hollow fiber membrane made of a hollow fiber membrane in the form of a bundle, inserted into the upper cap and the lower cap, and then bonded with an adhesive or the like.

However, this is merely an example, and any one of a flat and frame membrane, a spiral-wound membrane, and a tubular membrane may be applied.

In addition, although the membrane 34 is not shown in detail in the drawing, a bracket or a separate frame may be provided and fixed to the inside of the frame part 33. At this time, the membrane 34 is preferably provided inside the frame portion 33 to be removable for easy replacement.

On the other hand, the upper end of the membrane 34 is connected to the purified water discharge portion (50).

The purified water discharge part 50 is for suctioning and discharging purified water purified through the membrane 34, the suction pipe 51 connected to the upper end of each of the membrane 34, and the membrane 34 through the suction pipe 51. It is composed of a discharge pump 52 for discharging the purified water from the suction after discharging. In other words, the purified water purified through the membrane 34 may be discharged to the outside through the suction pipe 51 and the discharge pump 52. As such, the technique of connecting the pipe to the membrane 34 and discharging it to the outside is a well-known technique, and thus a detailed description thereof will be omitted.

On the other hand, the discharge pump 52 may use a known pump that can be operated intermittently. And, if the suction pipe 51 is a configuration for sucking and discharging the purified water through the discharge pump 52 does not matter any configuration.

The purified water discharged to the outside through the suction pipe 51 and the discharge pump 52 may be maintained in a suitable state through the A / C as shown in FIG. Here, A / C is an air conditioner that makes the use of high quality water treatment facilities, humidity control, air purification, and airflow adjustment in a proper state, and thus the detailed description thereof will be omitted.

On the other hand, although not shown in the drawings, when the purified water is discharged through the suction pipe 51, the discharge pump 52 and the A / C, a sterilization unit (U / V) to be provided to purify the purified water discharged once more It may be.

At this time, the sterilization unit may be made of any one of the UV-Lamp or UV-LED that emits ultraviolet rays to sterilize.

Accordingly, the purified water purified by the membrane 34 may be sucked and discharged through the suction pipe 51 and the discharge pump 52 to be recycled.

The coagulant inlet unit 40 serves to inject a coagulant that aggregates the separated raw water into the second tank 20. The coagulant inlet 40 is a second tank 20 of the second tank 20 by using a supply pipe 41 is introduced into the second tank 20 and the supply pump 42 provided on one side of the supply pipe 41. Feed the flocculant inside. Here, the flocculant is for the chemical treatment of raw water, it is possible to use a variety of known chemicals that aggregate the fine toxic substances contained in the raw water.

On the other hand, the supply pump 42 may use a known pump that can be operated intermittently. In addition, the supply pipe 41 does not have any problem as long as it is a configuration that can be smoothly supplied to the second tank 20 through the supply pump 42.

Precipitation unit 60 is provided in the lower portion of the first tank 10, the solid discharged through the outlet 22 is precipitated in the lower portion. The precipitation unit 60 is formed to have an inclination angle to prevent the deposition of precipitated solids. Preferably, the precipitation unit 60 has a conical shape, that is, a 'V' shape in the lower portion of the first tank 10, and surrounds the lower outer surface of the second tank 20 formed in a hopper shape.

In addition, the precipitation unit 60 serves to temporarily store the solids discharged from the second tank 20 when the solids formed by aggregation in the second tank 20 are discharged downward by the weight and the own weight. Done.

The solid discharge part 70 is connected to the settling part 60, and is settled in the settling part 60, and receives and stores the solid material temporarily stored therein, and serves to discharge it to the outside. The solid discharge part 70 may be configured to include a discharge valve 71, discharge pipe 72 and the solid storage unit (73).

The discharge pipe 72 is connected in communication with the settling unit 60 and the solid storage unit 73, and guides the solids precipitated in the settling unit 60 to be transferred to the solid storage unit 73. The discharge pipe 72 is opened and closed by the opening and closing operation of the discharge valve 71.

The discharge valve 71 is installed on the path of the discharge pipe 72 to intermittently open and close.

At this time, the operation of the MBR treatment method is usually operated for 8 minutes and 2 minutes of rest. The discharge pump 71 is operated during two minutes of rest time to open the discharge pipe 72 when the single tank waste water treatment apparatus of the present invention has two minutes of rest after 8 minutes of operation. On the other hand, when the 2-minute rest time is finished, the discharge pipe 72 is closed.

Accordingly, the solid matter (sludge) can be discharged by opening and closing frequently several times in a day, so that the moisture content becomes smaller than when discharging the solid material at once, and the user's convenience can be achieved.

On the other hand, it is preferable that a control device (not shown) for controlling the opening and closing operation of the discharge valve 71 is provided. In addition, it is preferable that the above-described supply pump 42 and discharge pump 52 are also set to operate under the control of a control device (not shown). Such a control device (not shown) is attached to the outer surface of the first tank 10 or installed at an appropriate position of the work space, and the opening and closing operation of the supply pump 42, the discharge pump 52 and the discharge valve 71 is performed. It is preferable that a predetermined set value is stored for control. In addition, the control device (not shown) controls the opening and closing operations of the supply pump 42, the discharge pump 52, and the discharge valve 71 according to a predetermined procedure.

The solid storage unit 73 is for discharging and storing the solids discharged through the discharge pipe 72 by the discharge valve 71 is opened, for example, may be made of a sludge box. The solid storage unit 73 has been described as being included in the solid discharge unit 70, but this is only an example, and is not a problem even if provided separately.

Therefore, according to the present invention as described above, the oil-water separation and flocculation reaction sedimentation separation of the raw water is carried out at the same time, thereby reducing the installation cost by simplifying the conventional treatment process, the solids (sludge) of The technical difficulties of the treatment can be solved, so there is no difficulty in maintenance even without the expertise in treating the wastewater.

However, such a single tank type wastewater treatment apparatus has the above advantages, but the surface of the membrane 33 is blocked by the untreated water, that is, there is a problem that fouling phenomenon occurs.

Accordingly, the air injection unit 100 for generating bubbles may be further provided. That is, the surface of the membrane 34 may be prevented from fouling (fouling) through the air injection unit 100 that generates bubbles, and the workpieces attached to the surface of the membrane 34 may be cleaned. .

The air injection unit 100 is positioned below the support member 31 and serves to clean the workpiece attached to the membrane 34 by spraying air toward the membrane 34.

Specifically, the air injection unit 100, as shown in Figure 1, the air supply means 101, the air supply pipe 102 and the air hole 103 for supplying air supplied from the air supply means 101 It may include.

The air supply means 101 serves to supply air to the air supply pipe 102. The air supply means 101 may use, for example, an air blower or a compressor, but is not limited thereto and may use various known air supply means.

The air supply pipe 102 is a pipe through which the air supplied from the air supply means 101 is transported, and is positioned below the support member 31. The air supply pipe 102 is preferably formed in a portion corresponding to the membrane 34 is located below the support member 31. In addition, the air supply pipe 102 is formed with a plurality of air holes 103 in the portion located below the support member (31). Here, the air ball 103 may be formed to have a predetermined number and a predetermined size on one side of the air supply pipe (102). This, the air hole 103 is preferably formed in the number and size of the air generated by the air supply means 101 can be smoothly supplied to the membrane (34) side.

Therefore, the air injection unit 100 generates air bubbles by injecting air supplied through the air supply means 101 to the membrane 34 through the air holes 103 provided in the air supply pipe 102. .

Bubbles generated by the air injection unit 100 collide with the raw water and the coagulant present in the second tank 20 to improve the coagulation effect. In addition, the bubbles generated by the air injection unit 100 also serves to clean the workpieces attached to the membrane 33.

However, in the case of using the air injection unit 100 as described above, as the air bubbles (bubbles) are collected at the top, they are agglomerated, and the object to be treated may be resorbed on the surface of the membrane 34.

Accordingly, the elastic member 32 may be provided between the support member 31 and the frame portion 33 to double the cleaning efficiency of the membrane 34.

Specifically, the elastic member 32 is supported between the support member 31 and the frame portion 33 so as to activate the fluidity of the frame portion 33 by vibration.

The elastic member 32 may be made of a spring (S) of the coil shape, is placed on the upper surface of the support member 31 and the lower portion of the frame portion 33, and activates the fluidity of the frame portion 33 by vibration By doing so, the workpiece attached to the surface of the membrane 34 is not resorbed.

When the spring (S) is generated by the air (air) raised to the air injection unit 100 and bubbles are generated, the spring (S) is vibrated by the generated pressure and bubbles. In addition, as the spring S vibrates, the frame part 33 also vibrates.

On the other hand, in order to adjust the pressure of the bubbles generated from the air injection unit 100, one side of the air supply pipe 102 may be provided with a pressure adjusting unit (not shown). Such a pressure regulator may be composed of, for example, a pressure sensor and a control valve, and may operate under the control of the above-described control device (not shown).

Meanwhile, in FIG. 1, two springs S are shown between the supporting member 31 and the frame part 33. However, this is only an example, and the spring S may not be a problem as long as it is a number for efficiently vibrating the frame part 33 through the vibration generated by the air injection part 100.

Therefore, the coagulation effect is increased by the air bubbles (bubbles) generated from the air injection unit 100, the cleaning effect of the membrane 34 can be improved, and the frame portion 33 as the spring S vibrates. ) Also vibrates to shake off the membrane 34, thereby increasing the effect of cleaning the object to be attached to the membrane 34. That is, fouling can be prevented from occurring on the surface of the membrane 34.

In addition, as the spring S vibrates by the air injection part 100, the frame part 33 also vibrates so that the object to be treated is not resorbed to the membrane 34.

On the other hand, the elastic member 32 may include not only the spring (S), but also the vibrator (V).

As shown in FIG. 1, a vibrator V may be provided at one side of the support member 31 to cause vibration of the frame part 33 and the membrane 34. Here, the vibrator (V) is a general air vibrator, it can operate through the surplus air of the air supply pipe (102). By vibrating the vibrator (V) it is possible to activate the fluidity of the frame portion 33 to prevent the re-adsorption of the workpiece attached to the membrane 34.

In the drawings, the spring S and the vibrator V are shown as being provided at the same time. However, this is only an example, and only one of the spring S or the vibrator V may be provided as necessary.

Therefore, according to the waste water treatment apparatus in the form of a single tank according to the present invention, the fouling is prevented from occurring on the surface of the membrane, and the object is not resorbed to the membrane. And it can reduce the chemical cost, and minimize the endurance of the membrane due to frequent cleaning.

Although the invention made by the present inventors has been described in detail according to the above embodiments, the present invention is not limited to the above embodiments, and of course, various changes can be made without departing from the gist of the invention.

10: first tank 20: second tank
30: water purification part 31: support member
32: elastic member 33: frame portion
34: membrane 40: flocculant administration
50: purified water discharge part 60: precipitation part
70: solids discharge part 100: air jet part
S: Spring V: Vibrator

Claims (5)

A first tank having an internal space formed so that raw water flows in, and separating oil water contained in the raw water;
A second tank provided inside the first tank and having an inflow pipe for introducing raw water separated from the first tank, and having a discharge port at a lower portion thereof to discharge the aggregated solids;
A water purification unit provided inside the second tank to purify the raw water introduced into the second tank by flowing water;
A coagulant injecting unit for injecting a coagulant for flocculating the separated raw water into the second tank;
A purified water discharge unit connected to the purified water unit and configured to suck and discharge purified water purified by the purified water unit;
A precipitation unit provided at a lower portion of the first tank and configured to precipitate the solids discharged through the discharge port; And
Is connected to the settling portion, after receiving and storing the solids precipitated in the settling portion, including a solid discharge portion for discharging to the outside,
The water purification unit
A supporting member spaced apart from the bottom surface of the second tank;
An elastic member carried on top of the support member;
A frame portion provided on an upper portion of the elastic member to vibrate by the elastic member; And
Removably provided inside the frame portion, and includes a plurality of membranes in the form of a hollow fiber membrane to purify the raw water introduced by flowing out of water,
The second tank
Located in the lower portion of the support member, and sprays air from the lower side to the upper side to clean the workpiece attached to the membrane, and includes an air injection unit to increase the cohesive efficiency of the raw water and the flocculant,
The elastic member is
The waste water treatment apparatus of the single tank type characterized in that for activating the fluidity of the frame portion by the vibration by the air of the air injection unit, so that the workpiece attached to the membrane is not resorbed. delete The method of claim 1, wherein the flocculant input unit
Supplying a flocculant into the inside of the second tank by using a supply pump provided on one side of the supply pipe introduced into the second tank,
The purified water discharge unit
A suction pipe connected to an upper end of each of the membranes; And
And a discharge pump for discharging the purified water through the suction pipe and discharging the purified water to the outside. delete delete

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