KR101458533B1 - System For Reducing Sludge Using Metabolic Uncoupler - Google Patents

Abstract

The present invention relates to a bioreactor in which a wastewater is introduced and a biological treatment process is performed; A sedimentation tank into which the treated water is introduced from the bioreactor to perform solid-liquid separation; And a sludge reduction tank for introducing the separated sludge into the sedimentation tank through solid-liquid separation and introducing a metabolic uncoupler into the sludge reducing tank to reduce sludge. Reduction system.

Description

{System For Reducing Sludge Using Metabolic Uncoupler}

In the present invention, sludge generated in the biological treatment process of wastewater and wastewater is reduced by using a metabolic uncoupler or the like to reduce or eliminate the disposal amount of the sludge and to reduce the amount of sludge that can be returned to a state suitable for biological treatment ≪ / RTI >

Generally, various processes are applied to the treatment of wastewater under organic conditions, for example, an active sludge treatment method is proposed. This activated sludge treatment method is a method of decomposing and treating an organic matter in the water to be treated by a biological action of an activated sludge. In this activated sludge treatment method, a large amount of microorganisms, which have grown in the process of biological decomposition treatment of organic matter, occur as sludge.

The sludge generated in such a large amount is separated and recovered by a settling tank and a part of the sludge is returned to the biological treatment process, but in addition, the part is disposed as surplus sludge. As a disposal method of surplus sludge, a method of concentrating excess sludge and dehydrating it and disposing it according to incineration or plug back is mainly used.

On the other hand, in disposal by plug back, it is difficult to secure a landfill repository for industrial waste, and the amount of such surplus sludge increases year by year, and the treatment cost also increases year by year. In the case of disposal by incineration, the water content of the excess sludge is high, so the fuel cost for incinerating the excess sludge becomes large, resulting in energy and environmental problems. In other words, besides disposal, disposal of surplus sludge is required.

For example, Korean Patent Registration No. 10-393284 discloses a process for completely decomposing organic matters in a short period of time by introducing high-temperature steam as a pretreatment thermal decomposition tank and fusing with an added alkali agent. It suggests a chemical treatment method that can reduce the time required for decomposition, input energy, and reduce necessary site.

However, according to the above-mentioned technology, there is a problem in that when the alkaline agent is over-treated to reduce the amount of sludge, there is a problem in the discharge water quality and there is a problem in that it is not environmentally friendly and the energy is excessively consumed by using the high- And there is a problem that it is difficult to expect a sufficient amount of sludge reduction by such a technique.

Korean Patent Registration No. 10-393284

Disclosure of the Invention The present invention has been made to solve the problems of the prior art as described above, and it is an object of the present invention to provide a sludge weight reduction system capable of sufficiently reducing sludge without affecting discharged water quality by using a proper metabolic uncoupler To provide.

According to an aspect of the present invention, there is provided a sludge reduction system using a metabolic uncoupler, the sludge weight reduction system comprising: a bioreactor in which a wastewater flows into a biological treatment process; A sedimentation tank into which the treated water is introduced from the bioreactor to perform solid-liquid separation; A sludge reducing tank for introducing the separated sludge into the sedimentation tank through solid-liquid separation and introducing a metabolic uncoupler to reduce sludge;

And a control unit.

Preferably, the metabolic uncoupler is selected from the group consisting of 2,4-dichlorophenol, 2,4-dinichlorophenol, para-nitrophenol, pentachlorophenol, (2,4,5-trichlorophenol), or a mixture thereof.

Preferably, the sludge reduction tank is in communication with the sludge inflow line through the settling tank, and is communicated by the bioreactor and the sludge return line, and is communicated by the infusion line with the chemical tank in which the metabolic uncoupler is installed. Do.

Preferably, the sludge reduction tank is provided with a rotation axis, which is located inside the sludge reduction tank, to which a rotational force is applied by the driving motor. A magnetic force applying unit integrally rotating with the rotation shaft and having at least one magnet mounted on an end thereof; And a plurality of magnetic impact particles disposed below the sludge reduction tank and having a magnetic property.

More preferably, the rotation shaft is located inside the sludge reduction tank, and the magnetic force applying unit is composed of a plate body integrally rotating with the rotation shaft on the magnetic impact particles and a magnet mounted on the plate body frame.

More preferably, the plate body is formed with a plurality of plate inlet holes in a radial shape, and a plurality of plate guide ends are formed in each plate inlet hole so as to form an upward slope.

More preferably, a plurality of vibrating bars are formed on the lower surface of the sludge reduction tank so that vibration energy is generated by the impact of the magnetic impact particles interlocked by the magnetic force applying unit.

As described above, the sludge weight loss system using the metabolic uncoupler according to the present invention controls the synthesis of the microbial cells originally by reacting the metabolic uncoupler with the excess sludge produced in the biological reactor to reduce the sludge weight loss efficiency . ≪ / RTI >

In addition, the sludge weight loss system using the metabolic uncoupler according to the present invention has an advantage that the sludge can be reduced without affecting the discharged water quality by adding physical treatment in addition to the metabolic uncoupler.

1 is a schematic view showing a basic example of the present invention,
2 is a schematic view showing the action mechanism of the metabolic uncoupler,
3 is a schematic view showing one embodiment of a sludge reduction tank in one embodiment of the present invention,
FIG. 4 is a perspective view showing a magnetic force applying unit in FIG. 3,
5 is an operational state diagram of a sludge reduction tank as another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a sludge reduction system according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, a sludge weight loss system 1 using a metabolic uncoupler according to the present invention includes a biological reactor 2 in which lower and wastewater flows and a biological treatment process is performed; A sedimentation tank 3 into which the treated water is introduced from the bioreactor 2 and solid-liquid separation is performed; And a sludge reduction tank 4 for introducing the separated sludge into the sedimentation tank 3 through solid-liquid separation and injecting a metabolic uncoupler to reduce sludge.

That is, according to the present invention, the excess sludge generated in the treatment process of the waste water by the biological reaction in the bioreactor 2 is allowed to react with the metabolic uncoupler in the sludge reduction tank 4 to reduce the sludge And the solubilized sludge is returned to the bioreactor 2 or treated for post-treatment such as cake-making.

As shown in FIG. 1, the bioreactor 2 comprises a bottom and a wastewater inflow line 11 on one side to allow the bottom and wastewater to flow therein. The bioreactor 2 removes nitrogen, phosphorus, And discharges the water to the settling tank 3 through the process water discharge line 12. Various known technologies can be applied to the bioreactor 2. For example, the bioreactor 2 is not shown in the drawing, but it can be configured to perform the biological treatment process by the anaerobic tank, anoxic tank, and aerobic tank.

In the sedimentation tank 3, the treated water introduced from the bioreactor 2 is sifted through solid-liquid separation through a specific gravity. The sludge thus filtered is introduced into the sludge inflow line 13 by the sludge reduction tank 4, As shown in FIG.

In the sludge reduction tank 4, a metabolic uncoupler is injected into the sludge so that the sludge reduction reaction is performed. The sludge reduction tank 4 includes a metabolic uncoupler The metabolic uncoupler of the chemical tank 5 through the chemical tank 5 and the infusion line 16 through the opening and closing valve not shown in the drawing but formed in the infusion line 16, (4).

The sludge reduction tank 4 communicates with the bioreactor 2 and the sludge return line 15 to transport a portion of the sludge solubilized in the sludge reduction tank 4 to the bioreactor 2 . In addition, the sludge not conveyed through the sludge discharge line (14) is allowed to be discharged to the outside so as to be treated by a post-process such as cake-making.

The metabolic uncoupler injected into the sludge reduction tank 4 is a part of the energy generated from the substrate by energy uncoupling the energy mechanism of catabolism and anabolism associated with ATP Thereby preventing sludge from being synthesized by the microbial cells.

That is, as shown in FIG. 2, when the metabolic uncoupler is introduced in the process of converting the organic material A into carbon dioxide, water B and sludge S, the amount of carbon dioxide and water B increases And the amount of sludge S is reduced.

Preferably, the metabolic uncoupler is selected from the group consisting of 2,4-dichlorophenol, 2,4-dinichlorophenol, para-nitrophenol, pentachlorophenol, (2,4,5-trichlorophenol), or a mixture thereof.

On the other hand, when the sludge is chemically reduced by only the metabolic uncoupler, there is a problem in the quality of the discharged water. In the present invention, in addition to the chemical sludge loss by the metabolic uncoupler, The amount of the metabolic uncoupler can be optimally reduced by reducing the amount of sludge so that the amount of sludge can be reduced without affecting the discharged water quality.

As shown in FIG. 3, the sludge reduction tank 4 is provided with a rotation shaft 41, which is located inside the sludge reduction tank 4 and is rotated by a driving motor m, A magnetic force application portion 42 having one end or more of the magnet 422 mounted on the end thereof and a plurality of magnetic impact particles 43 disposed below the magnetic force application portion 42 and magnetized .

That is, in the sludge reduction tank 4 of the present embodiment, in addition to the reduction of the chemical sludge by the metabolic uncoupler, the magnetic impact particles 42 (43) interlocked by the magnetic force of the magnetic force applying unit 42 The sludge S is pulverized by striking the sludge S so as to physically reduce the volume of the sludge and the sludge S conveyed to the bioreactor 2 is solubilized in a state suitable for biological treatment, . Here, solubilization refers to modifying the sludge to a state suitable for biologically treating the sludge, which means pulverizing the microorganisms constituting most of the sludge.

The magnetic force application unit 42 is located inside the sludge reduction tank 4 and the magnetic force application unit 42 is disposed inside the sludge reduction tank 4, (421) integrally rotatingly connected to the rotation shaft (41) at the upper part of the shaft (43) and at least one magnet (422) mounted on the edge of the plate body (421).

In this embodiment, the control shaft 411 is formed on the rotary shaft 41 so that the plate body 421, which integrally rotates with the rotary shaft 41, is engaged with the control jaw 411 in the upward and downward directions.

The plate body 421 is coupled to the rotary shaft 41 so as to rotate integrally with the rotary shaft 41, as well as to enable the upper and lower interlocking, as shown in FIG. Although not shown in the drawing, the plate body 421 and the rotary shaft 41 are engaged with gears at the lower portion of the control jaw 411, so that the rotational force of the rotary shaft 41 is transmitted to the plate body 421 At the same time, the upper and lower interlocking of the plate body 421 is also made possible.

The reason why the plate body 421 is interlocked with the rotation shaft 41 is that the action of the magnetic impact particles 43 at the lower portion of the plate body 421 to crush the sludge S by striking the plate body 421 The amount of the sludge S flowing into the lower portion of the sludge S is lowered.

A plurality of plate inlet holes 421-1 are radially formed in the plate body 421 and a plurality of plate body lead ends 421-2 are formed in the plate body inlet holes 121-1 so as to form an upward slope As shown in FIG. 4, the plate-shaped inlet holes 421-1 are formed in the radial direction from the rim of the disc-shaped plate body 421 and are composed of a plurality of radial plates.

The plate-shaped inductors 421-2 are configured to form the same slope in the same direction in the plate-shaped inlet holes 421-1. The plate-shaped inductors 421-2 are formed by rotating the plate 421, 2, the sludge S and the metabolic uncoupler M reacting with the sludge S are introduced into the plate body inflow hole 421-1. In other words, when counterclockwise rotational force is applied to the plate body 421 in the drawing, the sludge S and the metabolic reaction body 422 reacting with each other are introduced into the respective plate inlet holes 421-1 by the plate- So that the uncoupler M is introduced.

The magnetic impact particles 43 disposed on the undersurface of the sludge reduction tank 4 and the magnetic force applying portion 42 disposed on the lower surface of the sludge weight reducing tank 4 when the magnetic force application portion 42 is not in operation, The rotation of the magnetic force applying unit 42 is applied to the lower surface of the plate body 421 by the sludge S and the metabolic uncoupler M, So that the magnetic impact particles 43 strike the sludge S so that the sludge S and the metabolic uncoupler M function well as a stirrer.

The magnetic impact particles 43 are made of magnetic material so that rotation of the magnetic force applying portion 42 is generated by the magnet 422 of the magnetic force applying portion 42 when the magnetic force applying portion 42 is rotated. So that the sludge S is hit. The magnetic impact particles 43 may be made of various materials as long as they are magnetized.

5 shows an operation example of the sludge reduction tank 4. When the amount of inflow sludge S is large in the sludge reduction tank 4, The magnetic force applying unit 42 may be excessively floated upward in the sludge weight reducing tank 4 as the amount of the sludge S is increased and the magnetic force of the magnetic force applying unit 42 may become insignificant, The efficiency may be deteriorated. In order to prevent this, when the sludge S treated with the sludge return line 15 is discharged while being operated, non-uniform treatment can be performed.

Here, the non-uniform treatment means that the sludge S whose solubility has deteriorated can be returned by failing to uncouple and crush the sludge S sufficiently. Also, excessive unloading and crushing of the entire sludge contained in the sludge reduction tank 4 may require excessive metabolic uncouplers or excessive energy consumption.

As described above, the control jaw 411 is formed on the rotary shaft 41 to restrict the upward movement of the magnetic force applying unit 42. The position sensor 412 is formed in the control jaw 411 and the sludge return line 15 is provided with an on-off valve. The position sensor 412 and the on- The control unit 6 may be connected to the motor m so that the present invention can be controlled manually or automatically.

According to the operation example of this embodiment having such a configuration, the motor m drives the magnetic force applying unit 42 under the control of the control unit 6. By the rotation of the magnetic force applying unit 42, The sludge S and the metabolic uncoupler M are introduced into the plate body inlet hole 421-1 as shown in FIG. And flows up to the jaw 411 upward.

The magnetic striking particles 43 strike the sludge located under the plate body 421 in the range where the magnetic force of the magnetic force applying unit 42 is applied to the sludge returning line 42 ). In addition, when the magnetic force applying unit 42 reaches the control jaw 411, the position sensing sensor 412 senses it and automatically transmits the sensing signal to the control unit 6, Maintains the operation of the continuous magnetic force applying unit 42 in such a state for a preset time so as to sufficiently stir the sludge with the metabolic uncoupler in the space formed by the lower portion of the valve body 421 and the sludge reduction tank 4 And is pulverized by the magnetic impact particles 43 so as to be reformed into solubilized sludge. The control unit 6 turns on the on-off valve to discharge the solubilized sludge S through the sludge return line 15 when a predetermined time has elapsed during the operation. That is, only the solubilized sludge S is returned to the bioreactor 2.

In this way, only the sludge S sufficiently solubilized by the operation of the present embodiment can be transported, and the efficiency of the process can be improved. In terms of energy, the sludge reduction tank 4 is formed by the lower surface of the magnetic force applying portion 42 and the sludge reducing tank 4 The sludge stored in the total sludge weight reducing tank 4 can be processed sequentially only by energy that can be sufficiently operated only in the space.

5, a plurality of vibrating bars 44 protrude from the lower surface of the sludge reduction tank 4, and a plurality of vibrating bars 44 protrude from the bottom surface of the sludge reducing tank 4 to strike the magnetic impact particles 43 interlocked by the magnetic force applying unit 42 Thereby generating vibration energy in the vibrating bar 44. [0050]

The magnetic impact particles 43 subjected to the rotational force by the magnetic force application unit 42 strike the vibration bar 44 during the movement and the impact causes vibrations to be generated in the vibration bar 44, So that the vibration energy is directly transmitted to the sludge. In this way, vibration energy is directly transmitted to the sludge by the vibrating bar 44, thereby doubling the microbial pulverization efficiency, that is, the available efficiency, which occupies most of the sludge. It is to be understood that the vibrating bar 44 may be made of various elastic materials.

While the present invention has been described with reference to the particular embodiments and drawings, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Various modifications and changes may be made.

1: System 2 of the present invention: bioreactor
3: Sedimentation tank 4: Sludge reduction tank

Claims (7)

A biological reactor in which wastewater is introduced and a biological treatment process is performed;
A sedimentation tank into which the treated water is introduced from the bioreactor to perform solid-liquid separation; And
And is separated from the sedimentation tank by solid-liquid separation through a chemical tank communicating with the sedimentation tank and a sludge inflow line and communicating with the bioreactor and a sludge return line by a chemical tank and an injection line in which a metabolic uncoupler is embedded, And a sludge reduction tank for reducing the sludge by introducing a metabolic uncoupler into the sludge,
The sludge-
A plurality of magnetic impact particles disposed at a lower portion of the sludge reduction tank and magnetically coupled to the rotation shaft integrally with the rotation shaft at a position above the magnetic impact particles, And a magnetic force applying unit including a plate and a magnet mounted on at least one edge of the plate,
Wherein a plurality of plate inlet holes are formed radially in the plate body, and a plurality of plate guide ends are formed in each plate inlet hole to form an upward slope gradient.
The method according to claim 1,
The metabolic uncoupler may be selected from the group consisting of 2,4-dichlorophenol, 2,4-dinichlorophenol, para-nitrophenol, pentachlorophenol, trichlorophenol, (2,4,5-trichlorophenol), or a mixture thereof. The sludge weight reduction system using the metabolic uncoupler.
delete delete delete delete The method according to claim 1,
Wherein a plurality of vibrating bars are formed on the lower surface of the sludge reduction tank so that vibrational energy is generated by the impact of the magnetic impact particles interlocked by the magnetic force applying unit. Weight loss system.

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