JP2005066446A - Sewage cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve sewage cleaning efficiency by surely atomizing fat and oil. <P>SOLUTION: The subject sewage cleaner comprises a storage tank 20 that stores fat and oil-containing sewage, a pump 21 that pumps up the sewage in the storage tank 20, a magnetic field applicator 30 that passes the sewage pumped up by the pump 21 and returns the sewage to the storage tank 20 again, and applies magnetic fields to the sewage while the sewage is passing through the applicator 30. The magnetic field applicator 30 comprises a passing pipe 31 through which the sewage passes, magnets M that are installed outside the passing pipe for applying magnetic fields to the sewage passing through the passing pipe 31, and a screw 40 that is installed in the passing pipe 31 and has a rotation axis in the direction of the X-axis of the passing pipe 31. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a sewage purification apparatus for purifying sewage discharged from a meat factory or the like and containing fats and oils.

  In general, for example, in a meat factory, sewage containing fats and oils that are no longer needed and discarded when meat is processed is discharged, and such sewage is, for example, as shown in FIG. Using the purification system Ja, BOD (Biochemical Oxygen Demand), SS (Suspended Solid), n-Hex (n-Hexane Extracted Substance), etc. are removed and reduced. Like to do.

  This purification system Ja first treats sewage in which the size of the filth contained therein is limited to a size of about φ3 mm or less with a filter (not shown) or the like. Then, a relatively large suspended substance (SS) including fats and oils is removed in the pressurized levitation tank 2, and then the resident bacteria are decomposed in the aeration tank 3, and finally stored in the sedimentation tank 4, and the supernatant is obtained. From the river to the river 5 etc. A relatively large suspended substance containing the above fats and oils is stored in the sludge tank 6 and filtered by a filter cloth type dehydrator 7 at an appropriate time to be taken out as a solid component for processing.

  However, in this purification system Ja, a relatively large suspended substance containing fats and oils is filtered and processed by a filter cloth type dehydrator 7, but the fats and oils have a relatively large molecular structure. The filter cloth is likely to be clogged, and therefore, there is a problem that the filter cloth is frequently washed with chemicals, and the processing efficiency is lowered accordingly.

In order to solve such a problem, it is conceivable to refine the oil and fat so that the oil and fat is decomposed as much as possible in the aeration tank 3 instead of the dehydrator 7. For example, a purification device that refines fats and oils is used in the adjustment tank 1.
The inventors of the present application have studied the introduction of an apparatus for purifying sewage that can subdivide fats and oils by applying a magnetic field to the sewage.

As an apparatus for applying a magnetic field to sewage, a device described in, for example, Patent Document 1 (Japanese Patent Laid-Open No. 10-290979) has been known.
As shown in FIG. 8, the sewage purification device Da includes a storage tank 10, an exposure device 11, an activated carbon tank 12, a circulation pipe 13, and a pump 14. Sewage is sent to the storage tank 10 from the sewage sending pipe 10a. The storage tank 10 and the activated carbon tank 12 are connected by a circulation pipe 13, and a pump 14 and an exposure device 11 are interposed in front of the activated carbon tank 12. The sewage in the storage tank 10 is sent to the activated carbon tank 12 through the exposure device 11 by the pump 14.

  In the exposure magnetic device 11, magnetism is imparted to the sewage, and the water molecules bound in the sewage are subdivided by exposing the sewage to magnetism, and thereafter, the activated carbon is used in the activated carbon tank 12 to remove contaminant components in the sewage. In the activated carbon tank 12, the pollutant components are accumulated in the fine pores of the activated carbon. However, by subdividing the bonds between the water molecules, moisture can easily pass through the fine pores of the activated carbon. Even if it accumulates in the micropores, only water can easily pass through the activated carbon, and the number of times of removing the pollutant components adhering to the activated carbon can be reduced. In addition, an air delivery pipe 15 is attached to the activated carbon tank 12 in order to remove the pollutant and to promote biological treatment of the pollutant by bacteria. Air under pressure is sent from the air delivery pipe 15 to the activated carbon tank 12, and the polluted components adhering to the activated carbon are removed by bubbles generated thereby.

JP-A-10-290979

  However, in such a conventional sewage purification apparatus Da, the magnetic field is applied to the sewage by the exposure device 11 to refine water molecules and the like. However, there is a problem that miniaturization is insufficient only by applying magnetism. Therefore, there is a fact that this conventional apparatus cannot be used as it is for the refinement of oils and fats of the purification system Ja as shown in FIG. there were.

  The present invention has been made in view of the above-described problems. The sewage can be used for a sewage purification system containing fats and oils so as to surely refine the fats and oils, improve the purification efficiency of the sewage. An object is to provide a purification device.

  The sewage purification apparatus of the present invention for achieving such an object includes a storage tank in which sewage containing oil and fat is stored, a pump for pumping up the sewage in the storage tank, and sewage pumped up by the pump. In the sewage purification apparatus comprising a magnetic field applicator that applies a magnetic field to the passing sewage by returning to the storage tank again, the magnetic field applicator includes a passage pipe through which the sewage passes, and the passage pipe A magnet is provided on the outside for applying a magnetic field to the sewage passing through the passage tube, and a screw is provided in the passage tube and has a rotation axis in the axial direction of the passage tube.

Therefore, when using this sewage purification apparatus, sewage is stored in the storage tank in advance.
Next, the pump is operated to draw up the sewage from the storage tank, and the sewage is passed through the passage tube of the magnetic field applicator. In the passage tube, a magnetic field is formed by a magnet, and when sewage is sequentially introduced into the passage tube by the pump, the sewage passes through the magnetic field and a screw rotated by the flow of sewage is used. Pass through.
In this case, the sewage is exposed to the magnetic field of the magnet, and the fats and oils in the sewage are refined by the magnetic flux of the magnetic field. At this time, the oil and fat collide with the screw and are cut and refined by the rotation of the screw. In the screw, contaminants other than fats and oils are also refined.
When the fats and oils in the sewage are refined, the surface area of the fats and oils is increased and the oils and fats are easily combined with oxygen, and the decomposition of the fats and oils by resident bacteria is promoted, thereby improving the purification efficiency of the sewage.

  In addition, a plurality of the screws are provided in the axial direction of the passage tube as necessary. Since the fats and oils in the sewage collide with the screw many times and are cut, miniaturization is promoted.

  Further, if necessary, a plurality of magnets are arranged on one outer edge along the axial direction of the passage tube so that either one of the N poles or S poles of these magnets is positioned, while the one outer edge is arranged. A plurality of magnets corresponding to the magnets arranged on the one outer edge are arranged on the other outer edge opposite to each other so that either the N pole or the S pole of these magnets is located. A magnetic force line between N pole and S pole is formed from one outer edge side to the other outer edge along the axial direction, and this magnetic force line is sequentially traversed, so that the oil refinement efficiency is improved.

Furthermore, if necessary, the outlet of the passage pipe is provided at a position higher than the surface of the sewage stored in the storage tank so that the sewage is dropped from the outlet of the passage pipe, It is set as the structure which provided the scattering mechanism which disperses the sewage which falls on the way.
The sewage scatters when falling, and easily binds to oxygen in the atmosphere from the water surface. Therefore, resident bacteria in the sewage more easily decompose oils and fats using oxygen in the atmosphere.

  Further, if necessary, the scattering mechanism is expanded downward from the upper part of the injection port of the injection tube connected to the outlet of the passage tube and having a plurality of injection ports on the outer periphery. A guide body on a funnel that guides the sewage sprayed from the spray port of the tube, and a cone body having a conical surface on which the upper end faces the guide body and the sewage falling from the guide body flows outward. doing.

  The sewage flowing out from the outlet of the passage pipe is jetted from the jet port provided on the outer periphery of the jet pipe. In this case, the sewage injected from the injection port collides with the guide body and is directed downward, collides with the surface of the cone, then flows down the surface of the cone, and the storage tank below the outer periphery of the cone The sewage is diffused at a stroke from the injection pipe, and the fats and oils in the sewage are easily refined. In addition, since it collides with the guide body and is directed downward, and further flows down the surface of the cone, it is possible to lengthen the hover time when the sewage falls, so that the frequency of contact with air increases, The decomposition and oxidation of fats and oils in sewage are promoted, and the purification efficiency of sewage is improved.

  Further, an outward flange is provided on the outer peripheral edge of the cone as required. The sewage flowing down the cone reaches the flange and diffuses outward from the outer periphery of the flange. For this reason, it falls farther than when it is dropped from the outer periphery of the flange as it is, so the frequency of contact with air increases accordingly, the decomposition and oxidation of fats and oils in sewage is promoted, and the purification efficiency of sewage is improved. Can be improved.

As described above, according to the sewage purification apparatus of the present invention, the sewage is pumped and passed through the passage tube of the magnetic field applicator, so in the passage tube, the sewage is exposed to the magnetic field of the magnet to remove the fats and oils in the sewage. In addition to being able to be refined by the magnetic flux of the magnetic field, it can also be cut and refined by the rotation of the screw, so that it can easily bind to oxygen and promote decomposition by resident bacteria, etc. The purification efficiency of sewage can be improved. Further, in the screw, contaminants other than fats and oils are also made finer, and these are also easily oxidized and decomposed, so that the purification efficiency of sewage can be further improved.
In addition, when a scattering mechanism that scatters sewage is provided, sewage scatters when it falls, making it easier to combine with oxygen in the atmosphere from the water surface. Oils and fats can be easily decomposed using oxygen in the atmosphere, and purification efficiency can be improved.

  Hereinafter, based on an accompanying drawing, the purification device of the sewage concerning the best form for carrying out the present invention is explained in detail.

  The sewage purification apparatus according to the embodiment of the present invention shown in FIGS. 1 to 6 is used in the sewage purification system shown in FIG. The sewage purification system J shown in FIG. 6 treats sewage containing fats and oils in which the size of the filth contained therein is limited to a size of about φ3 mm or less in advance by a filter (not shown). A purification apparatus D according to the present embodiment provided as 1a, an aeration tank 3 for microbial treatment of sewage treated by the purification apparatus D, and a settling tank 4 for precipitation treatment of sewage treated in the aeration tank 3 It is prepared for.

  As shown in FIGS. 1 and 6, the basic configuration of the sewage purification apparatus D according to the embodiment of the present invention includes a storage tank 20 in which sewage containing oil and fat is stored and the sewage in the storage tank 20. A pump 21 for frying and a magnetic field applicator 30 for passing the sewage pumped by the pump 21 and returning it to the storage tank 20 and applying a magnetic field to the passing sewage are provided.

The storage tank 20 is poured with raw water of sewage in which the size of filth such as oil and fat contained therein is limited to about φ3 mm in advance by a filter or the like.
The pump 21 is located inside the storage tank 20 and pumps up the sewage and feeds the sewage to a later-described passage pipe 31 of the magnetic field applicator 30, and its discharge pressure is adjusted to about 0.2 MPa. ing.

  As shown in FIGS. 1 and 2, the magnetic field applicator 30 includes a passage pipe 31 through which sewage passes, a magnet M that is provided outside the passage pipe 31 and applies a magnetic field to the sewage that passes through the passage pipe 31, and A screw 40 provided in the passage tube 31 and having a rotation axis in the direction of the axis X of the passage tube 31 is provided.

As shown in FIG. 2, the passage tube 31 is made of, for example, a metal such as stainless steel, and has a straight tube 32 having a horizontal axis, and a pair of T-shaped tubes 33 provided at both ends of the straight tube 32. It has.
The T-shaped tube 33 is formed in a tubular shape having an axis X2 (X) coaxial with the axis X1 (X) of the straight tube 32 and is connected to both ends of the straight tube 32. A connecting portion 35 provided at a right angle to the main body portion 34 is provided on the side portion. The main body 34 has one end 36 connected to the straight pipe 32, and the other end 37 is provided with a bearing 37 a that fixes and supports a later-described rotating shaft 41 of the screw 40.

  Of the pair of T-shaped tubes 33, the connecting portion 35 of one T-shaped tube 33 is configured as an inlet 35 a into which sewage discharged from the pump 21 flows, and the connecting portion 35 of the other T-shaped tube 33 is It is configured as an outlet 35b through which sewage flowing into the passage pipe 31 flows out.

The straight pipe 32 of the passage tube 31 is provided with a plurality of magnets M on the outer edge 38 along the axis X (X1) direction of the passage tube 31 on the outer periphery thereof. S) A plurality of magnets M corresponding to the magnets M arranged on the one outer edge 38 are arranged on the other outer edge 39 opposite to the one outer edge 38 while these one poles are arranged. The N poles (N) and S poles (S) of the magnet M are arranged in a row so that the other pole is located.
In the purification device D according to the embodiment of the present invention, the magnet M arranged on one outer edge 38 has a surface with an S pole, and the magnet M arranged on the other outer edge 39 has an N pole (N). The surface with the is located toward the passage tube 31 side.
In FIG. 2, reference numeral 32 a is a tubular cover that covers each magnet M and is coaxial with the passage pipe 31 to prevent magnetic leakage, and reference numeral 32 b is a holding pipe that is fitted around the passage pipe 31 and holds each magnet M attached thereto.

  The magnet M is formed of, for example, a ceramic ceramic magnet, and causes a magnetic flux of 1000 to 5000 gauss, or 1800 gauss in the embodiment, to act inside the straight pipe 32.

The screw 40 is rotatably provided with respect to the rotation shaft 41. The screw 40 and the rotating shaft 41 are made of metal such as stainless steel, for example. The rotary shaft 41 is provided coaxially with the axis X1 (X) of the straight tube 32 and the axis X2 (X) of the main body portion 34 of the T-shaped tube 33, and both ends thereof are provided on the main body portion 34 of the T-shaped tube 33. It is fixedly supported by a bearing 37a provided at the other end.
A plurality of screws 40 (two in the embodiment) are provided at predetermined intervals in the axial direction. Further, these screws 40 are formed so as to receive sewage flowing through the straight pipe 32 and be rotated in the same direction.

  Further, as shown in FIGS. 1 and 6, the outlet 35 b of the passage pipe 31 is provided at a position higher than the surface of the sewage stored in the storage tank 20 so that the sewage is dropped from the outlet 35 b of the passage pipe 31. It is. A scattering mechanism 45 for scattering the falling sewage is provided in the middle of the path of the falling sewage.

  Specifically, as shown in FIGS. 3 to 5, the scattering mechanism 45 is connected to the left and right outlets of the branch pipe 44 connected to the outlet 35 b of the passage pipe 31 and has a plurality of injection ports 46 a on the outer periphery. , The funnel-shaped guide body 47 that spreads downward from the upper part of the injection port 46a of each injection pipe 46 and guides the sewage injected from the injection port 46a of the injection pipe 46, and the upper end of the guide pipe 46 And a conical body 48 having a conical surface 48a through which the sewage falling from the guide body 47 flows.

As shown in FIGS. 3 to 5, the injection tube 46 is made of, for example, metal, and a conical body 48 is suspended and held at the tip 46 b. A plurality of (in the embodiment, four) injection ports 46 a are provided on the outer periphery of the injection tube 46.
The guide body 47 is formed, for example, by press-molding a metal plate, and is provided with a base end portion 49 that is provided at an upper portion of the guide body 47 and is inserted into the injection pipe 46, and an expansion that is expanded from the base end portion 49. Part 50. The guide body 47 can be moved close to and away from the conical body 48 by adjusting the vertical position of the base end portion 49 with respect to the injection pipe 46, and by a bolt 49a screwed into the base end portion 49 at an appropriate position. It is fixed to the injection pipe 46.

  For example, the cone 48 is formed by press-molding a metal plate. As shown in FIG. 4, the top portion 51 of the cone 48 is joined to the tip 46 b of the injection tube 46, and the joining portion is connected to the bolt 54 and the joint portion. By being tightened and fixed with a nut 55, it is held suspended from the injection pipe 46. As shown in FIGS. 1 and 3, an outward flange 53 is provided on the lower outer peripheral edge 52 of the cone 48.

  Further, the clearance between the lower end edge 50a of the expanding portion 50 of the guide body 47 through which the sewage passes and the conical surface 48a of the conical body 48 expands when the guide body 47 of the scattering mechanism 45 is slid upward. Slide down to zoom out. Thereby, the clearance through which the sewage passes is adjusted, the flow of the sewage is adjusted, and the sewage is easily scattered. The guide body 47 is slid in advance, and the gap through which dirty water passes between the lower end edge 50a of the guide body 47 and the conical surface 48a of the cone 48 is adjusted to a desired size.

Therefore, in this sewage purification system J shown in FIG. 6, raw sewage whose size of oil and fat contained therein is limited to a size of about φ3 mm in advance is processed by a filter or the like. First, sewage is processed with the purification apparatus D which concerns on this Embodiment as an adjustment tank.
In the purification device D according to the present embodiment, raw sewage water containing fat is poured into the storage tank 20 to store the sewage.

In this state, the pump 21 is operated. Thereby, the pump 21 pumps up the sewage stored in the storage tank 20 and feeds the sewage to the passage pipe 31 of the magnetic field applicator 30. When the sewage is fed from the inlet of the passage pipe 31, the sewage is sequentially introduced into the straight pipe 32 via the T-shaped pipe 33 by the pump 21.
At this time, the sewage flowing into the straight pipe 32 rotates the screw 40 and is exposed to a magnetic field formed by the magnet M in the straight pipe 32. The fats and oils in the sewage flowing through the straight pipe 32 are refined by the magnetic flux of the magnetic field, collide with the rotating screw 40 and are cut by the screw 40, and the fats and oils are synergistically refined. Go. Further, since a plurality of magnets M are provided and a magnetic field line between N pole and S pole is formed from one outer edge side to the other outer edge along the axial direction, sewage sequentially traverses this magnetic field line, Therefore, the oil refinement efficiency can be improved. In this case, filths other than fats and oils collide with the rotating screw 40 and are cut by the screw 40 to be refined.

In addition, since a plurality of screws 40 are provided, the fats and oils in the sewage are collided and cut many times with the screw 40, so that also in this respect, the refinement of the fats and oils in the sewage is promoted.
And when the fats and oils in the sewage are refined, the surface area of the fats and oils increases, and it becomes easy to bind to oxygen, and the decomposition by resident bacteria in the fats and oils is easily promoted, and the purification efficiency of the sewage is improved. It is done.

Next, the sewage flowing out from the outlet of the passage pipe 31 flows into the injection pipe 46 of the scattering mechanism 45. The sewage flowing into the injection pipe 46 reaches the tip of the injection pipe 46 and is injected from an injection port 46 a provided on the outer periphery of the injection pipe 46.
The sewage ejected from the ejection port 46 a collides with the guide body 47 and is directed downward, collides with the surface of the cone 48, and then flows down the conical surface 48 a of the cone 48, and the outer periphery of the flange 53. As a result, the outer periphery of the flange 53 falls outward toward the lower storage tank 20.

  In this case, the sewage ejected from the ejection port 46a is oxidized by being combined with oxygen in the atmosphere from the water surface when falling, or resident bacteria in the sewage are refined using oxygen in the atmosphere. Decompose oils and fats. Further, the sewage is diffused from the injection pipe 46 at a stretch, and accordingly, the fats and oils in the sewage are easily refined. Furthermore, since it collides with the guide body 47 and is directed downward, and further flows down the surface of the cone 48, it is possible to lengthen the hover time when the sewage falls, and the contact frequency with the air is increased accordingly. Thus, the decomposition and oxidation of the fats and oils in the sewage are promoted, and the purification efficiency of the sewage is improved.

  Furthermore, since the sewage is dropped in the outward direction from the outer peripheral edge of the flange 53, the sewage falls to a farther position than when it is dropped as it is. It becomes high and decomposition and oxidation of fats and oils in sewage are promoted, and the purification efficiency of sewage is improved.

Next, the sewage falling to the storage tank 20 is mixed with the sewage stored in the storage tank 20 and is circulated again to the magnetic field applicator 30 by the pump 21 to refine the filth. And it sends out to the aeration tank 3 continuously or intermittently by the pump 60 which draws up the sewage provided in the storage tank 20 (adjustment tank 1a).
In the aeration tank 3, air is blown into the accumulated sewage sent from the storage tank 20 in the aeration tank 3 by the blower 3 a. And in the aeration tank 3, fats and oils are decomposed | disassembled into the aerobic microbe among the resident microbes contained in waste water by this blown air, or are oxidized with the said air. Therefore, BOD and SS in sewage are removed and reduced, and the purification efficiency of sewage is improved.
At this time, since the fats and oils are sufficiently refined in the adjustment tank 1a, decomposition and oxidation are efficiently performed in the aeration tank 3, and the purification efficiency of sewage is improved. Moreover, since the contaminant components other than fats and oils are also refined | miniaturized, it becomes easy to be decomposed | disassembled.
Thereby, since fats and oils are refined | miniaturized, the said conventional dehydrator becomes unnecessary and processing efficiency is improved.

  Most of the suspended matter (SS) in the sewage in which air is sufficiently blown in the aeration tank 3 is oxidized into air or decomposed into aerobic bacteria, but those that are difficult to be decomposed such as bone are suspended matter ( SS) will remain. The suspended matter (SS) remaining in the wastewater without being decomposed is precipitated in the settling tank 4. Then, after the suspended matter (SS) is precipitated, removed and reduced in the settling tank 4, the supernatant of the settling tank is discharged into a river or the like.

  The present invention is not limited to the meat factory described above, and is used for various purposes such as treatment of sewage containing manure discharged from a barn where livestock are raised or raw garbage discharged from facilities providing food and drink. Can be extremely useful.

1 is an overall view showing a sewage purification apparatus according to an embodiment of the present invention. It is an expanded sectional view which shows the magnetic field applicator of the purification apparatus of the sewage which concerns on embodiment of this invention. It is a half sectional view showing a scattering mechanism of a sewage purification apparatus according to an embodiment of the present invention. It is a partial cross section figure which shows the principal part of the scattering mechanism of the purification apparatus of the sewage which concerns on embodiment of this invention. It is a figure which shows the state of the position adjustment of a guide body in the scattering mechanism of the purification apparatus of the sewage which concerns on embodiment of this invention. It is a figure which shows the purification system with which the purification apparatus of the sewage which concerns on embodiment of this invention is provided. It is a figure which shows an example of the purification system provided with the conventional waste water purification apparatus. It is a figure which shows an example of the conventional purification apparatus of sewage.

Explanation of symbols

J Sewage purification system D Sewage purification device M Magnet N N pole S S pole X Axis of passage tube X1 Axis of straight tube X2 Axis of T-shaped tube 20 Reservoir 21 Pump 30 Magnetic field applying device 31 Passage tube 32 Straight tube 33 T-shaped tube 34 Main body 35 Connecting portion 35a Inlet 35b Outlet 36 One end 37 of T-shaped tube 37 Other end 37a of T-shaped tube Bearing 38 One outer edge 39 Other outer edge 40 Screw 41 Rotating shaft 44 Branch pipe 45 Scattering mechanism 46 Injection pipe 46a Injection port 47 Guide body 48 Cone body 48a Conical surface 49 Base end part 50 Expanding part 51 Top part 52 Cone lower outer peripheral edge 53 Flange

Claims (7)

A storage tank in which sewage containing fats and oils is stored, a pump for pumping up the sewage in the storage tank, and passing the sewage pumped up by the pump back to the storage tank and applying a magnetic field to the passing sewage In a sewage purification apparatus equipped with a magnetic field applicator that
The magnetic field applicator includes a passage tube through which sewage passes, a magnet provided outside the passage tube to apply a magnetic field to the sewage passing through the passage tube, and an axial direction of the passage tube provided in the passage tube. A sewage purification apparatus comprising a screw having a rotation axis.   The sewage purification apparatus according to claim 1, wherein a plurality of the screws are provided in the axial direction of the passage pipe.   A plurality of magnets are arranged on one outer edge along the axial direction of the passage tube so that either one of the N poles or the S poles of these magnets is positioned, while the other outer edge facing the one outer edge. A plurality of magnets corresponding to the magnets arranged on the outer edge are arranged in such a manner that either the N pole or the S pole of these magnets is positioned. The sewage purification apparatus as described.   The outlet of the passage pipe is provided at a position higher than the surface of the sewage stored in the storage tank, and the sewage is dropped from the outlet of the passage pipe into the storage tank, and falls in the middle of the path of the falling sewage. The sewage purification apparatus according to claim 1, 2 or 3, further comprising a scattering mechanism that scatters the sewage to be discharged.   The scattering mechanism is connected to the outlet of the passage tube and has a plurality of injection ports on the outer periphery, and guides the sewage that is expanded downward from the upper part of the injection tube and injected from the injection port. 5. A funnel-shaped guide body having a conical surface on which an upper end faces the guide body and sewage falling from the guide body flows down on the outer side. Sewage purification equipment.   6. The apparatus for purifying sewage according to claim 5, wherein an outward flange is provided on the lower outer peripheral edge of the cone. The sewage purification apparatus according to claim 5 or 6, wherein the guide body is provided in the injection pipe so as to be able to approach and separate from the cone.

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