KR200282778Y1 - An apparatus for advanced wastewater treatment by filtration through sludge suspension - Google Patents

Abstract

The present invention introduces denitrification by introducing inflow water such as domestic sewage and / or waste water into an anoxic tank, nitrifying the denitrified primary treated water into a nitrification tank, and transferring nitrified secondary treated water to a separation tank. The secondary treated water treated by the activated sludge is separated, and the separated tertiary treated water is discharged to the outside, and the tertiary treated water containing some activated sludge is mixed with air and circulated to an anoxic tank. It relates to a waste water treatment apparatus.

According to the present invention, it is possible to produce a small and medium sewage treatment apparatus that does not require a separate sedimentation tank while showing an efficiency similar to that of a large wastewater treatment apparatus.

Description

Advanced sewage treatment system by upflow sludge filtration method {An apparatus for advanced wastewater treatment by filtration through sludge suspension}

The present invention relates to a domestic sewage and wastewater treatment apparatus, and more specifically, an upflow sludge that maximizes its utilization range and treatment efficiency by applying an aerobic upflow aeration contact filtration reaction method while applying an anaerobic anaerobic reaction method. The present invention relates to a sewage and wastewater treatment apparatus using filtration.

In general, various kinds of sewage, industrial waste, and livestock wastewater from various household sewage and manure septic tanks are regulated to be discharged under the condition that BOD (biological oxygen demand) is discharged as much as possible due to environmental pollution. For this purpose, mandatory installation of wastewater purification treatment facilities is required in factories and large apartment complexes that discharge various wastewater and wastewater, and if discharged without proper treatment, it causes red tides and death of fish. Seriously destroying the ecosystem.

In order to solve these problems, various sewage treatment facilities such as septic tanks or combined septic tanks are equipped and used, but it is not easy to keep the effluent quality below environmental regulations. In particular, in large sewage treatment plants, there is no big problem in maintaining the treated water quality below the regulated value mainly by using the activated sludge process, but when attempting to apply the activated sludge method to a small to medium sized source, many technical difficulties are encountered.

When the activated sludge method is applied to small to medium-sized generators, the biggest problem is that the load of influent is not constant, compared to the low amount of wastewater discharged during the day, in the morning, in the evening, in the bathroom, kitchen and shower room for a short time. Due to the large amount of discharged water, the width of the load fluctuations varies greatly. Therefore, in order to apply the activated sludge method, it is necessary to design the size of the device to be larger than the device based on the average daily load, thus increasing the facility investment cost and requiring a large sheet of paper.

In addition, in an area where sewage pipes can be installed, all the sewage generated in the area can be collected in one place and treated with a treatment device using a large activated sludge process to improve the economics. There is a need to install a processing apparatus.

The present invention was derived in order to solve the above-described problems, to prepare the first treatment water by denitrification by inflow of inflow water such as domestic sewage and waste water into an anoxic tank, and the denitrified primary treatment water is introduced into the nitrification tank By nitrifying, the secondary treated water is prepared, and the nitrified secondary treated water is transferred to a separation tank having a “V” shaped cross section to separate the activated sludge and the secondary treated water treated by the activated sludge and tertiaryly. A device for treating domestic sewage and wastewater by producing treated water, discharging the tertiary treated water to the outside, and circulating the tertiary treated water including activated sludge into an anoxic tank using an air pump. There is a technical problem to provide.

1 is a perspective view of a hexahedral sewage treatment apparatus according to the present invention,

2 is a side view of a hexahedral sewage treatment apparatus according to the present invention,

3 is a plan view of a hexahedral sewage treatment apparatus according to the present invention,

4 is a perspective view of a cylindrical sewage treatment apparatus according to the present invention,

5 is a side view of the cylindrical sewage treatment apparatus according to the present invention,

6 is a plan view of a cylindrical sewage treatment apparatus according to the present invention.

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

2: inlet tube 4: screen

6: anoxic tank 8: separation tank

10 nitriding tank 12 air pump

14: diffuser 16: return sludge suction port

18: return sludge pipe 20: treated water collector

22: air outlet 24: discharge pipe

26: first inlet 28: first partition wall

28 ': second partition wall 30: third partition wall

32, 32 ': outlet 34: fourth partition wall

36: second inlet

The present invention is an anoxic tank in which inflow water is introduced to denitrification reaction, a nitriding tank in which the first treatment water treated in the anoxic tank is introduced and the nitrification reaction occurs, and is provided at an inner side of the nitriding tank to supply air to the nitriding tank, and the vaginal Secondary treated water that has passed through the tank is introduced into the separation tank for separating the activated sludge from the secondary treated water, the return sludge suction port provided on one side of the separation tank to suck the third treated water containing the active sludge, the return sludge A return sludge tube which is installed at a suction port and returns the third treated water containing activated sludge sucked into the return sludge suction port to an anoxic tank, and is installed at one side of the return sludge tube and tertiary treated water containing active sludge and air Mixing and discharging the air outlet and the air outlet and the air pump for supplying air to the diffuser (air lift pump) comprising a The features.

In addition, the present invention to prepare the first treatment water by denitrification by introducing the inflow water into the anoxic tank, to prepare the second treatment water by nitrifying the denitrified primary treatment water into the nitrification tank, the nitrified secondary treatment water Is transferred to a separation tank having a V-shaped cross section to separate the activated sludge and the secondary treated water treated by the activated sludge to prepare tertiary treated water, and the tertiary treated water is discharged to the outside and partially The tertiary treated water containing the activated sludge is circulated in an anoxic tank using an air pump.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a hexahedral sewage treatment apparatus according to the present invention, Figure 2 is a side view of the hexahedral sewage treatment apparatus according to the present invention, Figure 3 is a plan view of a hexahedral sewage treatment apparatus according to the present invention, Figure 4 is the present invention 5 is a perspective view of a cylindrical sewage treatment apparatus according to the present invention, FIG. 5 is a side view of the cylindrical sewage treatment apparatus according to the present invention, and FIG. 6 is described together as a plan view of the cylindrical sewage treatment apparatus according to the present invention.

As shown in Figures 1 to 3, the hexahedral sewage treatment apparatus according to the present invention is an inlet pipe 2, the inflow pipe 2, the inflow pipe 2, the inflow water, such as domestic sewage and / or waste water is passed through Screen 4 for removing coarse solids, organic matter, and paper contained in the influent, inflow water passing through the screen 4 is introduced into the oxygen-free tank (6) through which the denitrification reaction, the oxygen-free tank (6) Nitriding tank 10 in which primary treatment water flows in and nitrification occurs, an acid pipe 14 provided at one side of the nitriding tank 10 to supply oxygen to secondary treatment water for nitrifying reaction, and the nitriding tank The secondary treatment water passing through the (10) is introduced into the separation tank (8) for separating the activated sludge from the secondary treatment water, the activated sludge and the third treatment water is provided at the bottom of the separation tank (8) To the suction sludge suction port 16, and the suction sludge suction port 16. Transfer sludge pipe 18, which is connected to and installed to the third treatment water containing the activated sludge introduced into the transfer sludge suction port 16 to the oxygen-free tank (6), is installed on one side of the return sludge pipe 18 and active An air outlet 22 for mixing and discharging tertiary treated water including sludge, an air pump 12 for supplying air to the air outlet 22 and the diffuser 14, and the separation tank 8 It consists of a discharge pipe 24 for discharging the third treatment water separated from the outside.

The sewage treatment apparatus according to the present invention can be manufactured in a hexahedron shape or a cylindrical shape, and the wastewater is supplied from the inlet pipe 2 in a state of being opened and treated by the wastewater to separate the treated water from the activated sludge and sludge. It is made to be. In particular, the hexahedral sewage treatment apparatus as shown in FIG. 1 is configured by separating the interior into an anaerobic tank 6, a separation tank 8, and a nitride tank 10, and having a “V” shaped cross section at the center thereof. Vagina 8 is provided with an anoxic tank 6 provided with an inlet pipe 2, a screen 4, etc. on the left or right side of the tank 8, and the diffuser 14 on the other side facing the tank 8; It consists of a flower tank 10.

In addition, the first separation wall 28 and the second separation wall 28 ′ of the separation tank 10 bounded by the anoxic tank 6 and the nitriding tank 10 are anoxic tank 6 and the nitride tank 10. The height of the first and second separation walls 28 and 28 ′ is the height of the surface of the first and second treatment water to prevent the first and second treatment water from flowing into the separation tank 8. It is installed higher, and the second treatment water subjected to nitrification in the nitriding tank (8) to the lower side of the first separation wall 28 bounded by the nitriding tank (10) to be introduced into the separating tank (8). A first inlet 26 is provided for this purpose. Here, the first inlet 26 is formed higher than the conveying sludge suction port 16 provided to suck the tertiary treated water including the activated sludge to be returned to the oxygen-free tank 6, and separate the separation tank 8 from the nitriding tank 10. As soon as the secondary treatment water flowing into the separation tank 8 is introduced into the separation tank 8, it is not returned to the suction port 16.

On the other hand, the lower edge portion of the separation tank (8) having a cross section of the "V" shape is installed so as to be spaced apart by a predetermined distance or more from the inner bottom surface of the hexahedron forming the trench, the primary treatment water of the anoxic tank (6) To be introduced into the nitriding tank (10).

Referring to the operation of the hexahedral sewage treatment apparatus including such a configuration in detail as follows.

Inflow water such as domestic sewage and / or waste water flows into the screen 4 through the inflow pipe 2, and the inflow water flowing into the screen 4 passes through the screen 4 and is coarse solid and organic. Substances and papers are removed, and the inflow water from which the coarse solids, the organic materials, and the paper are removed is introduced into the oxygen-free tank 6. At this time, the inflow water flowing into the anoxic tank 6 is mixed with the third treated water including the activated sludge returned from the separation tank 8 and the air supplied to the outlet 22 by the air pump 12 and the plug flows It flows inside the anoxic tank 6 by a plug flow. Here, since the oxygen-free tank 6 does not aeration, many oxygen microorganisms inhabiting the active sludge particles generate oxygen from the nitric acid group contained in the influent to denitrate the influent. To prepare primary treated water.

On the other hand, a part of the primary treated water denitrified by the oxygen-free tank (6) is the bottom edge of the sewage treatment apparatus according to the present invention, that is, the bottom edge of the separation tank (8) having a "V" shaped cross section and the Passed through the space between the bottom surface of the sewage treatment device is transferred to the nitriding tank (10).

The primary treated water transferred to the nitriding tank 10 is aerated by the air discharged from the diffuser 14 provided on the bottom surface of the nitriding tank 10 to receive oxygen and to supply oxygen. Is a method of oxidizing the denitrified primary treated water to produce a secondary treated water by performing a nitrification process.

The secondary treated water nitrified by the nitrification process is transferred to the inside of the separation tank 8 through the first inlet 26 provided at one lower end side of the first separation wall 28 of the separation tank 8. Secondary treatment water containing the activated sludge transferred to the separation tank 8 is raised to the water surface of the separation tank 8, is included in the secondary treatment water rising to the water surface of the separation tank (8). The activated sludge which does not rise above a certain height is settled to the lower part of the separation tank 8, and the third treated water except the remaining activated sludge is mixed into the treated water collector 20 and treated with sewage through the discharge pipe 24. Ejected out of the device. Here, the separation tank 8 has a narrow lower end, and the upper end thereof is formed in a wide shape so that the treated water introduced into the first inlet 26 at the lower end of the first separation wall 28 is upper part of the separation tank 8. As it rises, the flow rate decreases and gravity increases to prevent the activated sludge from rising to the surface of the treated water.

On the other hand, when describing the sewage treatment apparatus manufactured in a cylindrical shape is another preferred form of the sewage treatment apparatus according to the present invention.

As shown in Figure 4 to 6, the cylindrical sewage treatment apparatus according to the present invention is basically an inflow pipe 2, inflow water, such as domestic sewage and / or waste water, inflow water from the inflow pipe (2) Is introduced into the anoxic tank 6 through which the denitrification reaction is carried out, the first treatment water having passed through the anoxic tank 6 is introduced into the nitriding tank 10 where the nitrification reaction occurs, and the nitriding tank 10 is provided with a nitriding tank ( A diffuser 14 for supplying air to 10, a secondary treatment water passing through the nitriding tank 10, and a separation tank 8 for separating activated sludge from the secondary treatment water, and the separation tank 8 ) Is provided at the lower end of the sludge and the return sludge suction port 16 which sucks in some tertiary treatment water and the sludge return port 16 connected to the return sludge inlet port 16. Return return which returns tertiary treatment water to be included in anoxic tank 6 The air outlet 22 which is installed at the end of the pipe 18, the return sludge pipe 18 and mixes and discharges the tertiary treated water containing the active sludge and air, the air outlet 22 and the diffuser ( 14) an air pump 12 for supplying air and a discharge pipe 24 for discharging the third treatment water separated from the activated sludge from the separation tank 8 to the outside.

However, since the cylindrical sewage treatment apparatus has a cylindrical shape as a whole, the oxygen-free tank 6, the separation tank 8 and the nitride tank 10 have a structure different from that of the hexahedral sewage treatment apparatus.

The inside of the cylindrical sewage treatment apparatus according to the present invention provides a hollow inverted cone-shaped partition wall to create an inner and outer space based on the inverted cone-shaped partition wall, based on the center of the inner space of the inverted cone-shaped partition wall. The fourth partition wall 34 is installed in the inverted cone-shaped partition wall space so that the left / right space is separated, and the lower end of either side of the left or right side of the fourth partition wall 34 is the cylindrical sewage treatment apparatus. Spaced apart from the bottom surface by a predetermined height so that the inverse cone-shaped partition outer space and the inner space communicate with each other, and the opposite lower end is attached to the bottom surface of the cylindrical sewage treatment device to separate the partition wall and the fourth separation. The inner space and the outer space bounded by the wall 34 are not in contact with each other. Here, the separation tank 8 separates a space in which the lower end of either side of the left side or the right side of the fourth separation wall 34 positioned in the inverse partition-shaped partition inner space is separated from the bottom surface of the cylindrical sewage treatment apparatus at a predetermined height. As such, the other space opposite to the other space is used as the oxygen-free tank 6 and the entire outer space of the partition wall in the form of an inverted cone is used as the nitrification tank 10.

Here, one or more outlets 32 and 32 'are provided at an upper end of the third separation wall 30 providing a boundary between the anoxic tank 6 and the nitriding tank 10 so that the treated water of the anoxic tank 6 can be To be transported to (10).

On the other hand, a plurality of diffusers 14 are installed on the bottom bottom surface of the nitrification tank 10 to discharge the air supplied from the air pump 12, and the separation tank 8 forming a boundary with the fourth separation wall 8. At the bottom of the), a return sludge suction port 16 for returning the treated water including the activated sludge flowing from the nitrification tank 10 to the anoxic tank 6 is provided, and is sucked into the return sludge suction port 16. In order to transfer the treated water including the activated sludge to the anoxic tank (6), it is connected and installed on one side of the return sludge pipe (18) and the return sludge pipe (18) for connecting the return sludge suction port (16) and the anoxic tank (6). And an air outlet 22 for blowing air supplied from the air pump 12 into the conveying sludge tube 18.

Referring to the operation of the cylindrical sewage treatment apparatus including such a configuration as follows.

First, inflow water such as domestic sewage and / or waste water passes through an inflow pipe 2 and flows into an oxygen-free tank 6 located inside the cylindrical sewage treatment apparatus. At this time, the inflow water flowing through the inlet pipe (2) can remove the solids and organic matter by passing through the screen (4) before entering the anoxic tank (6).

On the other hand, the inflow water flowing into the oxygen-free tank (6) is mixed with the air discharged by the tertiary treatment water and the air pump 12, including the activated sludge returned from the separation tank (8) plug flow (plug flow) form Flows inside the oxygen-free tank (6). Here, since the oxygen-free tank 6 does not aeration, many oxygen microorganisms inhabiting the activated sludge particles generate oxygen from the nitric acid group included in the influent to denitrate the influent. The primary treatment water is produced by oxidizing.

On the other hand, a portion of the primary treated water denitrified by the oxygen-free tank (6) is passed to the nitriding tank 10 through the outlets (32, 32 '), the primary transported to the nitriding tank (10) The treated water is supplied with oxygen while being aerated by air discharged from a plurality of diffusers 14 provided on the bottom surface of the nitriding tank 10, and the activated sludge present in the primary treated water supplied with the oxygen is The denitrified primary treated water is oxidized and subjected to nitrification to prepare a secondary treated water.

On the other hand, the secondary treated water nitrified by the nitrification reaction is moved to the other side facing the oxygen-free tank (6) along the circumferential surface of the cylindrical sewage treatment device to the nitriding tank 10 and the lower end of the separation tank (8) The separation tank 8 is passed to the separation tank 8 through the second inlet 36 provided to pass through each other. The secondary treatment water transferred to the separation tank 8 rises to the water surface of the separation tank 8, and the activated sludge contained in the secondary treatment water rising to the water surface of the separation tank 8 is constant. The third treatment water is produced by sedimentation by sedimentation to the lower portion of the separation tank 8 without raising the height. Then, the third treated water from which the activated sludge is removed is discharged to the outside of the cylindrical sewage treatment device through the discharge pipe 24.

Here, the separation tank 8 has a lower end thereof is narrower, and the upper end thereof is made wider so that the treated water introduced into the second inlet 36 at the lower end of the first separation wall 28 is upper part of the separation tank 8. As it rises, the flow rate decreases and gravity increases to prevent the activated sludge from rising to the surface of the treated water.

On the other hand, the return sludge suction port 16 is provided on one side of the second inlet 36 of the separation tank 8 to suck the tertiary treated water including the activated sludge settled. At this time, the tertiary treated water including the sucked activated sludge is transferred to the anaerobic tank 6 along with the returned sludge tube 18 connected to the return sludge suction port 16, and is moved to the anoxic tank 6. The tertiary treated water including sludge is conveyed to the anaerobic tank 6 together with the air discharged from the air outlet 22 connected to one side of the return sludge tube 18.

In the sewage treatment apparatus according to the present invention, the dephosphorization process for removing phosphorus contained in the treated water is performed after the soluble BOD components are fermented in the oxygen-free tank (6) as in the Phostrip process or the Bardenflow process, which are typical methods of the side flow process. Certain microorganisms that can be stored are carried out consuming the fermentation products. Phosphorus storage bacteria (Acinetabacter) formed in the oxygen-free tank (6) consumes the soluble phosphorus components in the aerobic conditions of the nitrification tank and the dephosphorization process is performed. However, if the concentration of phosphorus in the treated water is high and the treatment of phosphorus is insufficient by biological methods alone, chemical treatment is performed by incorporating a metal salt such as alumina sulfate, ferric chloride, or the like into the nitriding tank. You can do it in parallel.

Hereinafter, the present invention will be described in detail through examples. However, the following examples are only for illustrating the present invention in detail and are not intended to limit the scope of the present invention by these examples.

<Example>

After installing a 215 cm wide 599 cm sewage treatment apparatus having the configuration as shown in FIG. 1, the treated water having a BOD of 150 to 200 mg / l was supplied to 14 l / min to the inlet pipe 2. 6 volume of 8.1m ^3, be the volume of the Garden 10 is 12.1m ^3, the volume of the separation vessel 8 diffusers 14 from was 3.8m ^3, the air pump 12 and the air outlet of the ( 22) the air flowing in was 318 l / min.

The treatment capacity of the treated water treated by the sewage treatment apparatus including the above-mentioned structure was <10 mg / l on the basis of 1 ton / day, <10 mg / l of TSS (total rich solids) <10 mg / l, and TN (total water) < 1 mg / l and TP (total phosphorus) of 0.5 to 2.0 mg / l.

As described above, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. Therefore, the exemplary embodiments described above are to be understood as illustrative in all respects and not as restrictive. The scope of the present invention is to be construed that all changes or modifications derived from the meaning and scope of the utility model registration claims to be described later rather than the detailed description and equivalent concepts thereof are included in the scope of the present invention.

The sewage treatment apparatus according to the present invention is bounded by an inverted cone or "V" shaped separation tank separating an activated sludge and treated water from an anoxic tank in which denitrification occurs and a nitrification tank in which nitrification occurs, from a treated water containing activated sludge. By providing each of them on the left or right side, it is possible to provide a medium and small size sewage treatment apparatus that does not require a sedimentation tank while exhibiting an efficiency similar to that of a large wastewater treatment apparatus.

Claims (3)

Oxygen-free tank (6) to be produced as the first treatment water by the inflow water is introduced into the denitrification reaction, nitriding tank (10) to manufacture the second treatment water by the nitrification reaction of the first treatment water treated in the anoxic tank (6) Is provided on the inner side of the nitriding tank 10, the diffuser 14 for supplying air to the nitriding tank 10, the second treatment water subjected to nitrification reaction in the nitriding tank 10 is introduced into the secondary treatment Separation tank (8) for separating the activated sludge from the water to produce a third treatment water, the return sludge suction port (16) provided at one side of the lower end of the separation tank (8) to suck the third treated water containing the activated sludge And a return sludge tube (18) connected to the return sludge suction port (16) to return the third treatment water including the activated sludge sucked into the return sludge suction port (16) to an anaerobic tank (6). It is installed on one side of (18) and the tertiary treated water and activated sludge containing active sludge Air discharge port 22 for mixing and discharging the air, the air pump 12 for supplying air to the air outlet 22 and the diffuser 14 and the third treatment water separated from the activated sludge in the separation tank 8 Sewage treatment apparatus comprising a discharge pipe 24 for discharging the outside. The method of claim 1, Sewage treatment apparatus, characterized in that the separation tank (8) has a "V" shaped cross section. The method of claim 1, Sewage treatment apparatus, characterized in that the sewage treatment device is cylindrical or hexahedral.