KR101482214B1 - Apparatus and method for continuous filtering - Google Patents

Abstract

The present invention provides an apparatus for continuous filtering and a method for continuous filtering, wherein a scrubber arm is operated to effectively remove particulate matters or organic matters contained in wastewater. The apparatus for continuous filtering comprises: i) a main body applied to accommodate wastewater; ii) floating particulate filter materials accommodated in the main body and applied to filter wastewater and provide purified water; iii) a wastewater entrance installed on the side surface of the main body to supply wastewater continuously; iv) a purified water exit installed on the side surface higher than the wastewater entrance, faced to the filter materials and discharging purified water continuously; v) a sludge discharge hole intercommunicating with the bottom of the main body to discharge sludge filtered from wastewater; vi) a hollow pipe installed at a center inside the main body, placed higher than the wastewater entrance and separated from the side surface to extend vertically long; vii) a screw placed inside the hollow pipe; and viii) a scrubber arm placed below the screw to be coaxially connected to the screw, placed higher than the wastewater entrance, directly facing the bottom and having a turning radius larger than that of the screw.

Description

[0001] APPARATUS AND METHOD FOR CONTINUOUS FILTERING [0002]

The present invention relates to a continuous filtration apparatus and a continuous filtration method. More particularly, the present invention relates to a continuous filtration apparatus and a continuous filtration method in which a scrubber arm operates to effectively remove particulate matter or organic matter contained in wastewater.

Filtration is a process to remove particulate pollutants present in water by water treatment process to treat wastewater. If the particulate matter or organic matter in the wastewater is untreated and discharged, it will deplete dissolved oxygen in the river.

Examples of the filtration method for treating wastewater include biologically activated sludge method and physical sand filtration method. The biological activated sludge process requires a skilled operator due to the relatively large processing equipment and complicated operating method. Also, in the physical sand filtration method, the loss head of the filtration device increases and the filtration capacity decreases after a certain time. Therefore, a backwashing process is required to remove particulate matter excessively attached to the filter material.

The present invention provides a continuous filtration apparatus capable of effectively separating particulate matter and organic substances excessively adhered to a filter material through rotation of a scrubber arm, moving the filter material from a lower end to an upper end, and continuously filtering. Further, it is intended to provide a continuous filtration method using the above-described continuous filtration apparatus.

A continuous filtration apparatus according to an embodiment of the present invention comprises i) a main body adapted to receive wastewater, ii) porthole granular filter materials applied in the main body to filter wastewater to provide purified water, iii) Iv) a purified water outlet which is disposed on the side higher than the inlet of the wastewater and which is opposed to the filter materials and continuously discharges the purified water, v) a filtration unit for filtering the wastewater from the wastewater, Vi) a sludge outlet for discharging the sludge, vi) a hollow tube which is located at an inner center of the body and which is located higher than the wastewater inlet and which is spaced apart from the side and extending up and down, vii) a screw located inside the hollow tube, and viii) Is positioned coaxially with the screw and is located above the wastewater inlet and directly opposite the bottom, And a scrubber arm having a radius of curvature.

The scrubber arm may include at least one arm member extending in a second direction orthogonal to the first direction in which the screw extends. Wherein the at least one arm member comprises a plurality of arm members and wherein the plurality of arm members comprise i) a first arm member, and ii) a second arm member intersecting coaxially with the first arm member at a predetermined angle with the first arm member, And may include an arm member. The arm member may be formed in a linear shape or a planar shape. The arm member may include: i) a first arm portion extending longitudinally along a second direction; and ii) a second arm portion connected to the first arm portion and extending lengthwise along a third direction orthogonal to the second direction.

The distance between the lower end of the hollow tube and the scrubber arm may be more than the distance between the hollow tube and the body. The ratio of the distance between the lower end of the hollow tube and the scrubber arm to the distance between the hollow tube and the body may be 1.0 to 1.5. The upper end of the screw may be positioned higher than the upper end of the hollow tube. A plurality of protrusions may be formed on the outer surface of the hollow tube.

The continuous filtration method according to an embodiment of the present invention comprises the steps of: i) providing the continuous filtration apparatus described above; ii) filling the body with a floating particle filter material; and iii) Introducing the wastewater into the main body through the wastewater inlet, iv) passing the introduced wastewater through the porthole granular filter material to induce the particulate matter contained in the wastewater to adhere to the porthole granular filter material, v) V) removing the particulate matter attached to the floating particulate filter material by the rotating scrubber arm, vii) precipitating the separated particulate matter, viii) removing the screw Continuously circulating the suspended particulate filter material above and below the main body, and ix) discharging the precipitated particulate matter through the sludge outlet .

The wastewater can be continuously filtered while moving the floating particulate filter material from the bottom to the top using a continuous filtration device. Further, the particulate matter contained in the wastewater can be desorbed from the filter material by operating the scrubber arm. Therefore, wastewater can be continuously treated without backwashing.

1 is a schematic perspective view of a continuous filtration apparatus according to a first embodiment of the present invention.
FIG. 2 is a schematic cross-sectional view of the continuous filtration apparatus of FIG. 1 taken along line II-II.
3 is a schematic flow chart of the operation method of the continuous filtration apparatus of FIG.
4 is a schematic operational state diagram of the continuous filtration apparatus of FIG.
5 to 8 are schematic perspective views of a continuous filtration apparatus according to the second to fifth embodiments of the present invention.
9 is a graph showing changes in the concentration of organic substances in influent and effluent according to Experimental Example 1 and Comparative Example 1 of the present invention.
10 is a graph showing changes in concentration of particulate matter in influent and effluent according to Experimental Example 2 and Comparative Example 2 of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms as used herein include plural forms as long as the phrases do not expressly express the opposite meaning thereto. Means that a particular feature, region, integer, step, operation, element and / or component is specified, and that other specific features, regions, integers, steps, operations, elements, components, and / And the like.

Unless otherwise defined, all terms including technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Commonly used predefined terms are further interpreted as having a meaning consistent with the relevant technical literature and the present disclosure, and are not to be construed as ideal or very formal meanings unless defined otherwise.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

1 schematically shows a continuous filtration apparatus 100 according to a first embodiment of the present invention. The structure of the continuous filtration apparatus 100 of FIG. 1 is merely for illustrating the present invention, and the present invention is not limited thereto. Therefore, the structure of the continuous filtration apparatus 100 can be modified in other forms.

1, the continuous filtration apparatus 100 includes a main body 10, a floating particle filter material 20, an wastewater inlet 30, a purified water outlet 40, a sludge outlet 50, (60), a screw (70), and a scrubber arm (80). In addition, the continuous filtration apparatus 100 may further include other components as needed. On the other hand, the continuous filtration apparatus 100 can be connected to the motor M and driven.

As shown in Fig. 1, the main body 10 has a cylindrical shape elongated in the z-axis direction. The wastewater inlet 30 is provided on the side of the main body 10 to continuously supply wastewater. The purified water outlet 40 is installed on the side of the main body 10 higher than the wastewater inlet 30 to discharge the filtered purified water. That is, the wastewater flows into the main body 10 through the wastewater inlet 30 and is filtered while passing between the pile-up granular filter materials 20, and then discharged to the purified water outlet 40.

The floating granular filter material 20 functions to filter the wastewater and provide purified water. The floating granular filter material 20 may be made of a hydrophilic material accommodated in the main body 10 and having a specific gravity lower than that of water. That is, the floating particulate filter material 20 can be made of polypropylene (PP) or polyethylene (PE) having high hydrophilicity. More preferably, the porthole granular filter material 20 can be made of polypropylene. Further, the floating particle filter material 20 can be filled in the main body 10 at a porosity of 50% or less. If the porosity is too high, the discharge of purified water may not be smooth. Conversely, if the porosity is too low, the filtration capacity of the continuous filtration device may be small. Therefore, it is preferable to fill the floating particulate filter material 20 with a porosity of 35% to 45%.

The wastewater inlet 30 is installed on the side surface of the main body 10. The purified water outlet 40 is installed at a side surface of the main body 10 higher than the wastewater inlet 30. The wastewater inlet 30 and the purified water outlet 40 can be additionally installed on the side of the main body 10 when the inflow and outflow amount of the wastewater increases.

The sludge discharge port (50) communicates with the bottom of the main body (10) to discharge the sludge that is filtered by the wastewater. The sludge outlet (50) can be additionally installed on the bottom of the main body (10) when the inflow or outflow amount of the wastewater increases. In addition, the sludge outlet 50 may be inclined at a predetermined angle to collect the sludge in a desired direction.

The hollow tube (60) is located at the center of the inside of the main body (10) higher than the wastewater inlet (30). The hollow tube 60 has a cylindrical shape elongated in the z-axis direction, and the screw 70 is located inside the hollow tube 60. Thus, the diameter of the hollow tube 60 may vary depending on the diameter of the screw 70. [

The screw 70 can be automatically rotated in connection with the motor M. [ If the continuous filtration apparatus 100 is small, the screw 70 may be manually rotated. The gap between the hollow tube (60) and the screw (70) is preferably smaller than the diameter of the pillar-shaped granular filter material (20). If the distance between the hollow tube 60 and the screw 70 is larger than the diameter of the floating particulate filter material 20, the floating particulate filter material 20 is removed between the screw 70 and the hollow tube 60 I can go out. That is, the net exchange rate of the sub-type granular filter material 20 can be reduced. Therefore, it is preferable to adjust the interval between the hollow tube 60 and the screw 70 to the above-mentioned range.

The scrubber arm 80 is located at the bottom of the screw 70 and directly opposes the bottom of the body 10. The scrubber arm 80 includes a linearly formed arm member 801 extending in a direction perpendicular to the direction in which the screw 70 extends. The arm members 801 can be provided in one or more than one. The scrubber arm 80 can be formed so as to maximize the agitating force of the floating particle filter material 20. For example, protrusions (not shown) may be formed on the surface of the scrubber arm 80 to generate frictional force with the floating particulate filter material 20. Therefore, the particulate matter 201 adhering to the floating particulate filter material 20 can be more effectively removed from the floating particulate filter material 20. The scrubber arm 80 is connected coaxially with the screw 70 and has a turning radius greater than the turning radius of the screw 70. If the rotation radius of the scrubber arm 80 is smaller than the rotation radius of the screw 70, the rotation of the wastewater occurs only in a part of the main body 10, and the portion where the rotational force of the scrubber arm 80 does not affect is increased. Therefore, the rotational force of the scrubber arm 80 does not partially act on the floating particulate filter material 20 to which the particulate matter 201 is attached, so that the particulate matter 201 is removed from the floating particulate filter material 20 And the stirring of the floating granular particulate filter material 20 may not be performed smoothly. Hereinafter, the internal structure of the continuous filtration apparatus 100 of FIG. 1 will be described in more detail with reference to FIG.

FIG. 2 schematically shows a cross-sectional structure of the continuous filtration apparatus 100 cut along the line II-II in FIG. In other words, FIG. 2 shows the continuous filtration apparatus 100 taken along the zx plane direction in an enlarged view.

The distance d1 between the lower end portion 603 of the hollow tube 60 and the scrubber arm 80 is not less than the distance d2 between the hollow tube 60 and the main body 10 as shown in FIG. The amount of the floating particulate filter material 20 located between the hollow tube 60 and the scrubber arm 80 is small when the separation distance d1 is smaller than the separation distance d2. That is, the circulation rate at which the sub-type particulate filter material 20 moves to the upper portion of the main body 10 through the screw 70 and circulates inside the main body 10 can be reduced. Therefore, it is preferable that the separation distance d1 and the separation distance d2 satisfy the above-described relationship. More specifically, the ratio of the separation distance d1 to the separation distance d2 is preferably 1.0 to 1.5.

The upper end 701 of the screw 70 is positioned higher than the upper end 601 of the hollow tube 60. Since the upper end portion 701 of the screw 70 is positioned higher than the upper end portion 601 of the hollow tube 60, the floating granular filter material 20 rising through the hollow tube 60 can be more easily moved to the hollow tube 60 To the upper part. That is, when the floating particulate filter material 20 moves upward by the screw 70 and exits the screw 70, the hollow tube 60 surrounding the screw 70 is not disturbed. Therefore, the floating particulate filter material 20 can smoothly escape from the screw 70 smoothly.

As shown in FIG. 2, the screw 70 is connected to the motor M and rotates to move the floating particle filter material 20 in the direction of the arrow. That is, the floating particle filter material 20 existing in the lower portion of the main body 10 is conveyed to the upper portion of the main body 10 by the screw 70. The suspended particulate particulate filter material 20 transported upward moves gravity toward the bottom of the body 10 by its own weight. As a result, the floating particulate filter material 20 is continuously circulated in the main body 10 through the rotation of the screw 70. Hereinafter, the continuous filtration method of the continuous filtration apparatus 100 will be described in more detail with reference to FIG.

Fig. 3 schematically shows a flow chart of the filtration method of the continuous filtration apparatus of Fig. The filtration method of the continuous filtration apparatus of FIG. 3 is merely for illustrating the present invention, and the present invention is not limited thereto. Therefore, the filtration method of the continuous filtration apparatus can be modified in other forms.

As shown in Fig. 3, first, in step S10, a continuous filtration apparatus is provided. The continuous filtration device may be provided in plural depending on the amount of wastewater to be purified. Here, the continuous filtration apparatus 100 of FIG. 1 can be used as the continuous filtration apparatus. Next, in step S20, the continuous filtration apparatus is filled with a floating particulate filter material. The suspended particle filter material having a specific gravity lower than the specific gravity of water is floated on the wastewater to form a floating particle granular filter material layer.

In step S30, the wastewater enters the main body through the wastewater inlet provided on the lower side of the main body. The wastewater then rises and spreads to the front of the floating particulate filter material layer. Thus, the wastewater is in direct contact with the floating particulate filter material. Next, in step S40, the wastewater passes between the floating particle filter material. The wastewater is convected by the rotational force of a scrubber arm or the like. In step S50, the particulate matter contained in the wastewater is adhered to the surface of the floating particulate filter material. In this case, the particulate matter adheres to the surface of the floating particulate filter material to form a microorganism membrane while growing, and the microorganism membrane gradually grows over time.

In step S60, the motor is operated to operate the screw and the scrubber arm connected to the motor. In this case, the rotational speed may be 10 rpm to 25 rpm. When the rotation speed is too large or too small, it is difficult to separate the microbial membrane from the surface of the floating particle filter material. Therefore, it is preferable to set the rotational speed of the motor at the above-mentioned speed to operate at a constant speed.

Next, in step S70, the excessively grown microbial film attached to the surface of the pelletized particulate filter material is desorbed by the rotation of the scrubber arm to form a microbial film having a constant thickness. On the other hand, the desorbed microbial film is deposited on the bottom surface of the main body.

In step S80, the floating particle filter material in the lower part of the main body is moved upward from the lower part of the main body by screws. Then, the floating particulate filter material moves back to the lower part of the main body. That is, the floating granular filter material continuously circulates the inside of the body through the screw and continuously filters the wastewater.

Finally, in step S90, the particulate matter desorbed in the above-described step is discharged through the sludge discharge port. Hereinafter, the circulation mechanism of the floating particulate filter material 20 through the operating state diagram of the continuous filtration apparatus 100 will be described in more detail with reference to FIG.

Fig. 4 schematically shows the operating state of the continuous filtration apparatus 100 of Fig. Each of the enlargement circles in FIG. 4 shows a state in which particulate matter 201 is attached to the floating particle filter material 20. The operational state of the continuous filtration apparatus 100 of FIG. 4 is merely for illustrating the present invention, and the present invention is not limited thereto. Therefore, the operation state of the continuous filtration apparatus 100 can be modified in other forms.

The particulate matter 201 contained in the wastewater is agglomerated and adhered to the surface of the floating particulate filter material 20 rising by the screw 70 as shown in the left enlargement circle of Fig. As shown in the right enlargement circle of FIG. 4, when the time passes, the particulate matter 201 adhering to the floating particulate filter material 20 gradually grows to form a microbial film and gradually grows larger. In this case, the pores formed between the floating particulate filter materials 20 are gradually clogged by the microbial film and clogging occurs. The occlusion phenomenon increases the loss head in the filtration device and significantly reduces the filtration ability of the filtration device. Further, if the loss head continues, the function of the filtration device is lost, and untreated wastewater can be discharged to the purified water outlet.

Conventionally, in order to solve such a blocking phenomenon, the backwashing process for removing the microbial membrane passing through the pile-up granular filter material is carried out by alternately feeding water into the main body in the opposite direction, or the filter material is replaced in a short cycle. However, the backwashing process has a problem in that the time and cost required for the wastewater filtration are large. Further, since the method of replacing the floating particulate filter material can not immediately confirm the clogging phenomenon of the floating particulate filter material, there is a problem that the purification efficiency is rapidly lowered when the clogging phenomenon occurs. In addition, there is a problem in that the cost for a separate processor and a new filter material is rapidly increased.

In contrast thereto, the continuous filtration apparatus 100 according to an embodiment of the present invention uses the screw 70 and the scrubber arm 80. More specifically, when the particulate matter 201 attached to the floating particulate filter material 20 grows into a microbial membrane, the motor M is operated to rotate the screw 70 and the scrubber arm 80.

The scrubber arm 80 rotates the pillared particulate filter material layer at a slow speed and removes the microorganism membrane attached to the pillared particulate filter 20 from the pillared particulate filter 20. That is, the microbial membrane can be desorbed from the floating granular filter 20 by the flow force of the fluid generated by the rotation of the scrubber arm 80 or the rotating force of the floating granular filter material 20 itself. The desorbed particulate matter 201 is precipitated by gravity. That is, the microbial film attached to the floating particulate filter material 20 is formed into a microbial film having a constant thickness while being stirred by the rotation of the scrubber arm 80.

The screw 70 transfers the floating particulate filter material 20 having the microbial film formed thereon by the scrubber arm 80 to the upper side of the main body 10 from the lower side of the main body 10. The floating granular particulate filter material 20 transported upward moves gravity from the upper side to the lower side of the main body 10. [ That is, the floating particulate filter material 20 is continuously moved from the lower side to the upper side of the main body 10 through the rotation of the screw 70, and circulates inside the main body 10. That is, since the particulate matter 201 contained in the wastewater is separated from the floating particulate filter material 20 naturally by the scrubber arm 80, the continuous filtration apparatus 100 can omit the backwashing process. The process of moving the floating particulate filter material 20 from which the particulate matter 201 has been removed to the upper side through the screw 70 is repeated to continuously perform the filtration process without exchanging the floating particulate filter material 20 can do.

Therefore, when the continuous filtration apparatus 100 is used, the water treatment efficiency of the wastewater is improved and it is not necessary to use the backwashing facility, so that the installation area and the operation cost are unnecessary. On the other hand, the desorbed particulate matter 201 is precipitated and discharged through the sludge outlet 50. Hereinafter, other embodiments of the screw 70 and the scrubber arm 80 will be described in more detail with reference to FIGS.

Fig. 5 schematically shows a continuous filtration apparatus 200 according to a second embodiment of the present invention. The structure of the continuous filtration apparatus 200 of FIG. 5 is similar to that of the continuous filtration apparatus 100 of FIG. 1 except for the scrubber arm 803, so that the same reference numerals are used for the same portions, It is omitted.

As shown in FIG. 5, the scrubber arm 803 of the continuous filtration apparatus 200 includes arm members 8031 and 8033. The arm members 8031 and 8033 include a first arm member 8031 and a second arm member 8033. The first arm member 8031 extends in a direction perpendicular to the direction in which the screw 70 extends. The second arm member 8033 has a predetermined angle with the first arm member 8031. The arm members 8031 and 8033 are formed while crossing each other. Although two arm members 8031 and 8033 are shown in Fig. 5, the arm members 8031 and 8033 can be deformed into various angles and numbers.

The continuous filtration apparatus 200 smoothly circulates the particulate matter 201 and the particulate particulate filter materials 20 by using a plurality of arm members 8031 and 8033. Therefore, the continuous filtration apparatus 200 can remove the microbial membrane adhered and grown on the subtype particulate filter material 20 relatively quickly from the particulate particulate filter material 20, so that the filtration efficiency of the continuous filtration apparatus 200 can be improved Can be improved.

6 schematically shows a continuous filtration apparatus 300 according to a third embodiment of the present invention. The structure of the continuous filtration apparatus 300 of FIG. 6 is similar to that of the continuous filtration apparatus 100 of FIG. 1 except for the scrubber arm 805, and thus the same reference numerals are used for the same portions, It is omitted.

As shown in FIG. 6, the scrubber arm 805 of the continuous filtration apparatus 300 includes arm members 8051 and 8053. The first arm member 8051 and the second arm member 8053 cross each other. The first arm member 8051 is connected to an arm portion 8055 extending in the y-axis direction and an arm portion 8057 extending in the x-axis direction, and an arm portion 8057 extending in the x- (8059). The second arm member 8053 has the same shape as the first arm member 8051 and forms a predetermined angle with the first arm member 8051. Although FIG. 6 shows two arm members 8051 and 8053, the arm members 8051 and 8053 may be modified in various forms.

The arm member 8051 induces irregular movement of the wastewater through the rotation of the arm portions 8055, 8057, 8059 extending in various directions to generate a disturbing fluid flow. Therefore, the floating particulate filter materials 20 and the microbial membrane are well separated to improve the water treatment efficiency.

7 schematically shows a continuous filtration apparatus 400 according to a fourth embodiment of the present invention. The structure of the continuous filtration apparatus 400 of FIG. 7 is similar to that of the continuous filtration apparatus 100 of FIG. 1 except for the scrubber arm 807, so that the same reference numerals are used for the same parts, It is omitted.

As shown in FIG. 7, the scrubber arm 807 of the continuous filtration apparatus 400 includes planar wings 8071. The planar wings 8071 may have a flat surface shape or may have a shape bent at a predetermined angle.

Since the wafers 8071 of the planar shape are used to rotate the wastewater, the flow disturbance of the wastewater stored in the main body 10 becomes large, and the motion of the particulate matter 201 contained in the wastewater becomes active. Therefore, a larger amount of wastewater can be treated within the same time, so that the treatment efficiency of wastewater can be improved.

8 schematically shows a continuous filtration apparatus 500 according to a fifth embodiment of the present invention. The structure of the continuous filtration apparatus 500 of FIG. 8 is similar to that of the continuous filtration apparatus 100 of FIG. 1 except for the hollow tube 605, so that the same reference numerals are used for the same portions, It is omitted.

As shown in FIG. 8, the hollow tube 605 includes a protrusion 6051. The protrusion 6051 can be integrally manufactured through the molding process with the hollow tube 605. [ The projection shape of the protrusion 6051 may be formed in various shapes such as a sphere, an ellipse, a polyhedron, and a cross. As a result, the floating particulate filter materials 20 collide with the protruding portions 6051, so that the particulate matter 201 can be desorbed well. In other words, when the floating particulate filter material 20 moves downward from the upper portion of the main body 10, a frictional force is generated by colliding with the projecting portion 6051. As a result, the microbial film formed on the surface of the floating particulate filter material 20 can be efficiently removed. Therefore, the microbial membrane can be efficiently removed using the hollow tube 605 of the continuous filtration apparatus 500.

Hereinafter, the present invention will be described in more detail with reference to experimental examples. These experimental examples are only for illustrating the present invention. The present invention is not limited thereto.

Concentration experiment of organic matter

Experimental Example 1

A continuous filtration apparatus having the same structure as in Fig. 1 was produced. The experiment was carried out using a continuous filtration device. The volume of the main body of the continuous filtration apparatus was set to 2 L, the inflow amount of wastewater was 21 L / day, the inflow rate was 0.37 cm / min, the wastewater retention time was 27.33 min and the rotation speed of the motor was 21 rpm. The main body of the continuous filtration apparatus described above was filled with a floating particle filter material and wastewater was injected. Then, the screw and the scrubber arm were rotated to flow the wastewater in the main body. Concentrations of organic substances were sampled in a conical tube at three times a day at the same time once a day for 38 days by the water pollution process test method (CODmn method). The average value was calculated from the measured values. The details of the experiments are easily understood by those skilled in the art to which the present invention belongs, so that detailed description thereof will be omitted.

Comparative Example 1

Experiments were carried out in the same manner as in Experimental Example 1, except that the scrubber arm was not operated.

Experimental results of concentration changes of organic substances

9 schematically shows a graph comparing the filtration efficiencies of Experimental Example 1 and Comparative Example 1 of the present invention. More specifically, FIG. 9 shows the results of the difference in the concentration of organic substances in the influent and effluent of the continuous filtration apparatus of Experimental Example 1 and Comparative Example 1 of the present invention. In Fig. 9, the rhombus represents the inflow concentration, and the square represents the outflow concentration.

As shown in FIG. 9, the concentration of the organic material contained in the wastewater was changed from the inflow concentration of about 18 mg / L to the effluent concentration of about 6 mg / L in the section of Experimental Example 1. That is, it was confirmed that about 67% of the organic material was removed. In contrast, in the comparative example, the concentration of the organic substance gradually increased with time. It can be seen that this phenomenon is caused by the increase of the loss head due to the leakage or occlusion of some microbial membranes at the upper part of the filter. In addition, it was confirmed that uneven flow phenomenon occurs in the filter material, and the concentration of the organic material in the effluent water is relatively high. After 50 days, the organic matter contained in the wastewater was changed to an effluent concentration of about 10 mg / L at an influent concentration of about 18 mg / L. That is, in the comparative example, about 44% of the organic material was removed. Therefore, it can be seen that the organic material can be removed more effectively than the organic material of Comparative Example 1.

Concentration change experiment of particulate matter

Experimental Example 2

The suspended filter device manufactured by the method of Experimental Example 1 was filled with a floating granular filter material and wastewater was introduced. The concentration of particulate matter in effluent was measured and the concentration of particulate matter in influent and effluent was checked. The concentration of particulate matter was sampled in a conical tube at three times a day at the same time once a day and measured for 37 days by the water pollution process test method (CODmn method). The average value was calculated from the measured values. The remaining experimental procedure was the same as Experimental Example 1 described above.

Comparative Example 2

Experiments were carried out in the same manner as in Experimental Example 2, except that the scrubber arm was not operated.

Experimental results of concentration change of particulate matter

Fig. 10 schematically shows the comparison of the filtration efficiencies of Experimental Example 2 and Comparative Example 2 of the present invention. More specifically, FIG. 10 shows the concentration difference of particulate matter between the influent and the effluent in the continuous filtration apparatus according to Experimental Example 2 and Comparative Example 2 of the present invention. In Fig. 10, the rhombus represents the inflow concentration and the square represents the outflow concentration.

In Experimental Example 2, the concentration of particulate matter was reduced from about 25 mg / L to about 6 mg / L. That is, the removal rate of the particulate matter is about 76%, which is relatively high. In contrast, in the comparative example, the concentration of the particulate matter was reduced from about 25 mg / L to about 9 mg / L, and the particulate matter removal rate was about 64%. Therefore, it can be confirmed that the removal efficiency of the particulate matter is better than that of Comparative Example 2.

In addition, in the dotted circle of FIG. 10, in Comparative Example 2, it was found that some particulate matter was discharged into the effluent while being occluded by the particulate matter. Therefore, it can be seen that Experimental Example 2 stably filters the particulate matter contained in the wastewater.

It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the following claims.

10. Body
20. Floating granular filter material
30. Wastewater inlet
40. Purification water outlet
50. Sludge outlet
60, 605. Hollow tube
70. Screw
80, 803, 805, 807. Scrubber arms
201. Particulate matter
601. Hollow tube top
603. Bottom of hollow tube
701. Screw top
6051. Protrusions
801, 8031, 8033, 8051, 8053. The arm member
8055, 8057, 8059. The dark portion
8071. Wings

Claims (10)

A body adapted to receive wastewater,
Floating particulate filter materials accommodated in the body and adapted to filter the wastewater to provide purified water,
A wastewater inlet provided at a side of the main body to continuously supply the wastewater,
A purified water outlet which is installed on the side surface higher than the wastewater inlet and faces the filter materials and continuously discharges the purified water,
A sludge discharge port communicating with the bottom of the main body to discharge the sludge filtered from the wastewater,
A hollow tube disposed at an inner center of the body and positioned higher than the wastewater inlet and spaced apart from the side,
A screw located inside the hollow tube, and
A scraper arm positioned coaxially with the screw and located above the wastewater inlet and directly opposite the bottom and having a turning radius greater than the turning radius of the screw,
/ RTI >
Wherein the scrubber arm includes at least one arm member extending in a second direction orthogonal to a first direction in which the screw extends. delete The method of claim 1,
Wherein the at least one arm member comprises a plurality of arm members,
Wherein the plurality of arm members
The first arm member, and
A second arm member that intersects the first arm member at the predetermined angle with the first arm member and coaxial with the first arm member;
And a continuous filtration device. The method of claim 1,
Wherein the arm member is formed in a linear or planar shape. The method of claim 1,
The arm member
A first arm portion extending along the second direction,
A second arm portion connected to the first arm portion and extending in a third direction orthogonal to the second direction,
And a continuous filtration device. The method of claim 1,
Wherein a distance between a lower end of the hollow tube and the scrubber arm is equal to or greater than a distance between the hollow tube and the main body. The method of claim 6,
Wherein a ratio of a distance between a lower end of the hollow tube to a distance between the hollow tube and the body and a distance between the lower end of the hollow tube and the scrubber arm is 1.0 to 1.5. The method of claim 1,
Wherein the upper end of the screw is located higher than the upper end of the hollow tube. The method of claim 1,
And a plurality of protrusions are formed on the outer surface of the hollow tube. Providing a continuous filtration device according to claim < RTI ID = 0.0 > 1, <
Filling the body with the floating particle filter material,
Flowing wastewater through the wastewater inlet to the main body filled with the floating particulate filter material,
Passing the flowing wastewater through the pillar-shaped granular filter material to induce particulate matter contained in the wastewater to adhere to the pillar-shaped granular filter material,
Operating the motor to rotate the screw connected to the motor and the scrubber arm,
The particulate matter attached to the floating particulate filter material is removed by the rotating scrubber arm,
Precipitating the desorbed particulate matter,
Continuously circulating the floating particle filter material above and below the main body by the screw; and
And discharging the precipitated particulate matter through the sludge outlet.

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