KR100540012B1 - Ds-lt system - Google Patents

Abstract

The present invention relates to a post-treatment apparatus and method for treating residual organic matter and nitrogen after high concentration wastewater treatment. And / or treating the remaining organic substances and nitrogen by selectively combining them according to the characteristics of the high concentration wastewater, such as systemizing the / C filter treatment or systemizing the MBR-denitrification filter treatment-ozone treatment. By using the method, not only the overall process rotation speed and the water treatment time for water treatment meeting the water treatment standards can be shortened, but also in the high concentration wastewater treatment apparatus, the whole treatment may be performed when additional equipment is installed to increase the water treatment efficiency. The process must be stopped, but the post process does not affect the existing treatment process. It is possible to install and to efficiently process the organic material and nitrogen as excellent in terms of its effectiveness.

Therefore, the after-treatment apparatus and method for wastewater according to the present invention have the effect of improving the water quality and securing stable treatment efficiency by treating the remaining organic substances and nitrogen after being treated in the existing process.

Description

High concentration wastewater after-treatment device and its method {DS-LT SYSTEM}

The present invention relates to a post-treatment apparatus and method for treating residual organic matter and nitrogen after high concentration wastewater treatment, and to systemize MBR-denitrification filter treatment or ozone treatment-A to treat residual organic matter and nitrogen even after high concentration wastewater treatment. And / or treating the remaining organic substances and nitrogen by selectively combining them according to the characteristics of the high concentration wastewater, such as systemizing the / C filter treatment or systemizing the MBR-denitrification filter treatment-ozone treatment. By using the method, not only the overall process rotation speed and the water treatment time for water treatment meeting the water treatment standards can be shortened, but also in the high concentration wastewater treatment apparatus, the whole treatment may be performed when additional equipment is installed to increase the water treatment efficiency. The process must be stopped, but the post process does not affect the existing treatment process. It is possible to install and to efficiently process the organic material and nitrogen as excellent in terms of its effectiveness.

Therefore, the after-treatment apparatus and method for wastewater according to the present invention have the effect of improving the water quality and securing stable treatment efficiency by treating the remaining organic substances and nitrogen after being treated in the existing process.

Membrane separation process separates materials without phase change compared to the existing process, so the process is simple and energy-efficient compared to other separation processes, and suspended materials, colloids, enzymes, proteins, Organic solvents, salts, and the like may be separated, and specific components may be separated and concentrated in a mixed gas. Due to these advantages, various applications such as raw material separation and concentration in the food industry, production of ultrapure water applied to boiler and semiconductor cleaning processes, recovery of effective materials in wastewater, and recycling technologies are in progress.

  Membrane separation process is simpler than other processes, so the process design and facility expansion are convenient, and the volume of the facility itself can be reduced, thus minimizing installation area. In particular, when the wastewater is treated using the membrane separation process, the amount of sludge generated can be minimized because the use of chemicals is small in the treatment process, and the treated water obtained in the membrane process can be used as raw water or directly in the manufacturing process depending on the water quality. In addition, the capacity of the concentrated wastewater can be reduced to less than 10% of the total generated wastewater, so the membrane separation process is the core technology for the development of a zero discharge wastewater treatment system.

When the membrane process and the filter treatment method are used, the existing high concentration wastewater treatment does not efficiently process organic materials and nitrogen, and needs to be processed through the whole process again, thus inducing time reduction according to the rotation speed and the rotation speed. It can be done efficiently.

In order to achieve the above object, the present invention additionally installs a post-treatment device in an existing high concentration wastewater treatment system, and proceeds sequentially with a post-treatment after high concentration wastewater treatment, thereby efficiently processing organic materials and nitrogen, thereby rotating the process. It is an object of the present invention to provide a post-treatment apparatus and method for high concentration wastewater that can lead to shortening of water and time.

In order to achieve the above object, the present invention has the following technical configuration.

After the MBR and the denitrification filter treatment, or after the ozone treatment and A / C filter, or after the MBR and the denitrification filter treatment, the wastewater is subjected to post-treatment by ozone treatment. ,

An inlet pipe 1 for introducing wastewater; An equalization tank 2 for supplying the wastewater to the MBR tank 5 using the first pump 21 while maintaining a constant amount of the introduced wastewater; An MBR tank 5 for membrane-processing the wastewater pumped from the equalization tank 2 using the air supplied from the air supply 43; A denitrification filter 6 which receives wastewater from the MBR tank 5 by the second pump 40 and performs denitrification by a filter installed therein; Or a discharge pump 71 for discharging the treated water to the outside from the treated water tank 7 for storing the denitrified final treated water, or

Remove the MBR tank 5 located between the equalization tank 2 and the denitrification filter 6, and instead of using the MBR tank 5, pressurize using the first pump 21 in the equalization tank 2. An ozone contact tank 3 for inducing contact between the wastewater and ozone flowing from the ozone generator 31; A substitutes for the denitrification filter 6, which is connected to the ozone treatment tank 4 and the second pump 40 for receiving ozone from the wastewater transferred from the ozone contact tank 3 by receiving air from the stirring blower 42. / C filter 6-1 is configured, or

An ozone contact tank 3 for inducing contact with ozone flowing from the ozone generator 31 between the legendary denitrification filter 6 and the treatment water tank 7; It is characterized in that the ozone treatment tank (4) for receiving ozone from the waste water conveyed from the ozone contact tank (3) by receiving air from the stirring blower (42).

Looking at the complete mechanical coupling configuration according to the above device configuration with reference to the drawings,

MBR  + Denitrification filter device

As shown in FIG. 1, the aftertreatment apparatus for treating residual organic materials and nitrogen after high concentration wastewater treatment includes an inlet pipe 1 for introducing wastewater; An equalization tank 2 for supplying the wastewater to the MBR tank 5 using the first pump 21 while maintaining a constant amount of the introduced wastewater; An MBR tank 5 for membrane-processing the wastewater pumped from the equalization tank 2 using the air supplied from the air supply 43; A denitrification filter 6 for receiving wastewater from the MBR tank 5 by the second pump 40 and performing denitrification treatment; It is composed of a treatment water tank (7) for storing the denitrified final treatment water and a discharge pump (71) for discharging the treatment water from the treatment water tank (7) to the outside through the discharge pipe (72).

Ozone unit + A / C filter unit

As shown in Figure 2, the inlet pipe 1 for introducing waste water; An equalization tank 2 for pumping the wastewater into the ozone contact tank 3 using the first pump 21 while maintaining a constant amount of the introduced wastewater; An ozone contact tank (3) for inducing contact between the wastewater pumped from the equalization tank (2) and ozone flowing from the ozone generator (31); An ozone treatment tank (4) for ozone treatment of the wastewater transferred from the ozone contact tank (3) by receiving air from the stirring blower (42); An A / C filter 6-1 for filtering the wastewater pumped from the ozone treatment tank 4 by the second pump 40; It consists of a treatment water tank (7) for storing the final treated water filtered, discharge pump (71) and discharge pipe (72). The filter installed inside the A / C filter 6-1 is characterized in that formed by mixing 20 to 40% by weight of zeolite, 60 to 80 activated carbon.

MBR  + Denitrification filter device  + Ozone system

As shown in Figure 3, the inlet pipe (1) for introducing the waste water; An equalization tank 2 for supplying the wastewater to the MBR tank 5 using the first pump 21 while maintaining a constant amount of the introduced wastewater; An MBR tank 5 for membrane-processing the wastewater pumped from the equalization tank 2 using the air supplied from the air supply 43; A denitrification filter 6 for receiving wastewater from the MBR tank 5 by the second pump 40 and performing denitrification treatment; An ozone contact tank 3 for inducing contact of ozone flowing from the ozone generator 31; An ozone treatment tank (4) for ozone treatment of the wastewater transferred from the ozone contact tank (3) by receiving air from the stirring blower (42); It consists of a treatment water tank (7) for storing the final treated water pumped from the ozone treatment water tank (4) through the third pump (41), a discharge pump (71) and a discharge pipe (72).

Looking at the post-treatment process of wastewater according to the device configuration,

Wastewater containing organic substances and nitrogen remaining after the high concentration wastewater treatment is introduced into the equalization tank (2) through the inflow pipe (1), and the introduced wastewater is introduced into the MBR tank (5) using the first pump (21). By removing the pollutants generated on the surface of the membrane and supplying air into the wastewater while supplying air from the lower air supplier 43, the wastewater is membrane treated, and the treated wastewater is denitrified using the second pump 40. The treated water pumped to the filter 6 and finally filtered in the denitrification filter 6 is transferred to the treated water tank 7 and discharged using the discharge pump 71, or

Instead of removing the MBR tank 5 from the treatment apparatus and using the MBR tank 5, the wastewater to be treated after being introduced into the equalization tank 2 is subjected to the ozone contact tank 3 using the first pump 21. ), The ozone supplied from the ozone generator 31 and the wastewater introduced from the equalization tank 2 are sufficiently brought into contact with the ozone treatment tank 4, and the air supplied from the stirring blower 42 is used. And ozone treatment with stirring, and the ozonated wastewater is pumped to the A / C filter 6-1 by the second pump 40 and filtered. Finally, the filtered wastewater is transferred to the treatment tank 7. Discharged to the discharge pump 71, or

The waste water denitrified by the denitrification filter 6 described above is not directly transferred to the treatment water tank 7, but the ozone supplied from the ozone generator 31 is sufficiently brought into contact with the waste water in the ozone contact tank 3. Transfer to the treatment tank (4), in the ozone treatment tank (4) to ozonate the waste water while stirring by the air supplied from the stirring blower (42), the treated waste water is transferred to the treatment tank (7) to discharge pump Discharge treatment to (71).

In the MBR tank (5), the wastewater is treated using an immersion membrane module. At this time, the solvent permeability increases at high pressure, but contaminants are strongly bound inside the membrane to accelerate the contamination, and thus, the proper pressure must be maintained. The material has to be considered according to the treatment situation because the solvent permeability and exclusion rate vary according to the hydrophilicity and hydrophobicity of the membrane, the distribution of coating charge on the surface of the membrane, the surface roughness, porosity and particle size distribution. The structure and design of the membrane module is due to the velocity of the fluid at the membrane surface, and low flow rates increase concentration polarization and contamination and consequently decrease permeability, requiring frequent cleaning. Therefore, the linear velocity in the membrane module should be increased to minimize the concentration polarization phenomenon and maintain the flow state to reduce the accumulation of suspended matter. Typical types of membrane modules are tubular, hollow fiber, spiral wound, and plate and frame. The selection of a suitable module according to the treatment target is an important factor for economical and efficient processing. .

The denitrification filter 6 uses a method of nitrifying ammonia using nitrifying microorganisms, reducing nitric acid to nitrogen gas using a denitrifying microorganism, and releasing it into the air, thereby reducing nitrogen in the reaction system.

By treating the residual organic material and nitrogen after the high concentration wastewater treatment using the separation membrane and the filter as described above, it is possible to reduce the processing time and cost in the shortest time in treating the high concentration wastewater.

As described above, the post-stage treatment apparatus and method according to the high concentration wastewater treatment according to the present invention efficiently treat organic substances and nitrogen remaining in the high concentration wastewater treatment, resulting in more efficient treatment of organic substances and nitrogen than conventional treatment methods. It contributes to stable treatment water quality and water quality improvement.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic diagram of an aftertreatment apparatus for wastewater of a first embodiment according to the present invention.

Fig. 2 is a schematic diagram of an aftertreatment apparatus for wastewater according to a second embodiment of the present invention.

Fig. 3 is a schematic diagram of an aftertreatment apparatus for wastewater of a third embodiment embodiment according to the present invention.

Explanation of the main symbols in the drawings

1: inflow pipe 2: equalization tank 3: ozone contact tank

4: ozone treated water 5: MBR bath 6: denitrification filter

6-1: A / C filter 7: Treatment tank 21: First pump

31 ozone generator 41 third pump 42 stirring blower

43: air supply 44: second pump 71: discharge pump

72: discharge pipe

Claims (6)

An inlet pipe 1 for introducing wastewater; An equalization tank 2 for supplying the wastewater using the first pump 21 while maintaining a constant amount of the introduced wastewater; An MBR tank 5 for membrane-processing the wastewater pumped from the equalization tank 2 using the air supplied from the air supply 43; The wastewater is supplied from the MBR tank 5 by the third pump 41 to the denitrification filter 6 for denitrification by a filter installed therein, or to induce contact with ozone introduced from the ozone generator 31. An ozone contact tank 3; A that replaces the denitrification filter 6, which is connected to the ozone treatment tank 4 and the third pump 41 for receiving ozone from the wastewater transferred from the ozone contact tank 3 by receiving air from the stirring blower 42. After discharged to the / C filter (6-1), the discharge pump for discharging the treated water from the treated water tank (7) and the treated water tank (7) for storing the denitrified final treated water to the outside through the discharge pipe (72) ( 71, an ozone contact tank (3) for inducing contact with the ozone flowing from the ozone generator (31) between the denitrification filter (6) and the treatment water tank (7); In further comprising an ozone treatment tank (4) for receiving ozone from the waste water conveyed from the ozone contact tank (3) by receiving air from the stirring blower (42), The A / C filter (6-1) is a high concentration wastewater after-treatment device, characterized in that formed by mixing 20 to 40% by weight zeolite, 60 to 80% by weight activated carbon. delete delete Wastewater containing organic substances and nitrogen remaining after the high concentration wastewater treatment is introduced into the equalization tank through the inlet pipe 1, and the introduced wastewater is discharged into the MBR tank 5 using the first pump 21. The wastewater is membrane-treated by supplying air from the lower air supplier 43 and supplying air from the lower surface air supply 43 to the membrane surface contaminants and supplying the air into the wastewater. The denitrification filter 6 is transported, and the treated water finally denitrified by the denitrification filter 6 is transferred to the treatment water tank 7 or by the first pump 21 to the ozone contact tank 3. The ozone supplied from the ozone generator 31 and the wastewater introduced from the equalization tank 2 are sufficiently brought into contact with the ozone treatment tank 4, and the ozone treatment is carried out while stirring using the air supplied from the stirring blower 42. A / C filtration replacing the denitrification filter 6 with the wastewater treated with ozone by the second pump 40 In the water treatment process, which is pumped to the air conditioner 6-1 and finally filtered, the waste water is transferred to the treatment water tank 7 and discharged through the discharge pipe 72 using the discharge pump 71. The waste water denitrified by the denitrification filter 6 transfers the ozone supplied from the ozone generator 31 and the waste water to the ozone treatment tank 4 by making sufficient contact with the ozone contact tank 3, and the ozone treatment tank ( In 4), ozone treatment of wastewater is carried out while stirring by air supplied from the stirring blower 42, and the treated wastewater is pumped to the treatment water tank 7 through the third pump 41 and discharged to the discharge pump 71. High concentration wastewater after-treatment method characterized in that the treatment. delete delete