KR20110095750A - Wastewater treatment system using filter paper filled with absorbent media coating hydroxide metal salt, and wastewater treatment method using the same - Google Patents

Abstract

PURPOSE: Wastewater treatment facility and method using an adsorption filter medium coated with hydrated metal salt are provided to secure the excellent water quality. CONSTITUTION: A wastewater treatment facility using an adsorption filter medium coated with hydrated metal salt comprises a wastewater inlet, an absorption filter(610), and a wastewater outlet. The absorption filter treats wastewater inflowing through the wastewater inlet by absorbing and filtering. The wastewater outlet discharges the effluent treated by the absorption filter. The absorption filter includes plural supporters filled with the adsorption filter medium coated with the hydrated metal salt.

Description

WASTEWATER TREATMENT SYSTEM USING FILTER PAPER FILLED WITH ABSORBENT MEDIA COATING HYDROXIDE METAL SALT, AND WASTEWATER TREATMENT METHOD USING THE SAME}

The present invention relates to a wastewater treatment facility and a wastewater treatment method for treating wastewater using an adsorption medium, and more particularly, to a wastewater treatment facility and a wastewater treatment method for treating wastewater using an adsorption medium coated with a metal hydroxide salt. will be.

In the case of lakes and stagnant bodies of water, increased concentrations of nitrogen and phosphorus cause odors due to overproduction of algae.

During the sun, dissolved oxygen is saturated in the water due to algae photosynthesis, but at night without sun, photosynthesis ceases and the dissolved oxygen decreases due to the nature of breathing algae.

When the dissolved oxygen is depleted, the algae die, settle, and decay, causing the water quality to deteriorate and lose its value as a source of water. The generation of such algae can be controlled by removing nitrogen (N) and phosphorus (P) which are restriction nutrients.

In Korea, the restriction of nutrients in rivers and lakes is phosphorus, so removing phosphorus is known to prevent the growth of algae. However, algae can be reproduced at very low concentrations, and without sufficient phosphorus, algae cannot be prevented.

Accordingly, an object of the present invention is to provide a single process structure in which filtration and adsorption are simultaneously performed in a wastewater treatment facility, and at the same time, maximize the performance of the adsorption media while ensuring excellent water quality. To provide.

The wastewater treatment facility according to the present invention includes a wastewater inflow unit through which wastewater is introduced; Adsorptive filter paper for treating the wastewater introduced through the wastewater inlet through adsorption and filtration; And it may include a waste water discharge unit for discharging the effluent treated in the adsorption filter paper.

In addition, the adsorptive filter paper may include a plurality of supports and an adsorption mediator that covers the entire metal support with a metal hydroxide, and is filled before the wastewater inflow, thereby treating the wastewater using the adsorption media.

In addition, the wastewater treatment facility may further include an adsorption media supply unit connected to the adsorption filter paper to supply the adsorption media to the adsorption filter paper.

In addition, the wastewater treatment facility is connected to the adsorption filter paper, and when the adsorption filter media has the standard adsorption performance, the adsorption media having the standard adsorption performance is discharged from the adsorption filter paper, and the adsorption media which has the standard adsorption performance is regenerated. The filter medium may further include a filter recovery regeneration unit.

In addition, the adsorption media recovery recovery unit may return the regenerated adsorption media to the adsorption media supply unit.

In addition, the adsorption media supply unit supplies the adsorption media from the upper portion of the adsorption filter paper to the lower portion, and the adsorption media recovery recovery unit receives the adsorption media with the standard adsorption performance from the lower portion of the adsorption filter paper filled in the adsorption filter paper Adsorption media can be carried out while the adsorption reaction is sequentially moved from the top to the bottom of the adsorption filter paper.

In addition, the metal hydroxide metal salt may include any one of iron, aluminum, activated alumina, titanium.

Waste water treatment method according to the invention the waste water inflow step; A treatment step of treating the introduced waste water through adsorption and filtration; And a discharge step of discharging the effluent treated in the treatment step.

In addition, the treating step may include a step of treating the waste water by using an adsorption filter paper filled with a plurality of supports and a metal hydroxide salt coated on the whole of the plurality of supports before the waste water inflow.

In addition, the wastewater treatment method may further include an adsorption media supply step of supplying the adsorption media to the adsorption filter paper.

The wastewater treatment method may further include discharging, from the adsorption filter paper, the adsorption filter having the standard adsorption performance when the adsorption media filled in the adsorption filter paper has the standard adsorption performance. And an adsorption media recovery recovery regeneration step of regenerating adsorption media having the standard adsorption performance.

In addition, the adsorption media recovery recovery step may include the step of returning the regeneration adsorption media to the adsorption media supply unit for performing the adsorption media supply step to be supplied again in the adsorption media supply step.

In addition, the adsorption media supply step is to supply the adsorption media from the top of the adsorption filter paper to the bottom, and the adsorption media recovery recovery step is to receive the adsorption media with the standard adsorptive performance from the bottom of the adsorption filter paper to the adsorption The adsorption media filled in the filter paper may be sequentially moved from the top to the bottom of the adsorption filter paper to perform the adsorption reaction.

According to the present invention, a single process structure can be provided because filtration and adsorption are simultaneously performed in a wastewater treatment plant.

In addition, according to the present invention, there is an effect that can ensure excellent water quality while maximizing the performance of the adsorption medium.

1 is a view showing a wastewater treatment facility for wastewater treatment according to a comparative example of the present invention.
2A and 2B are views for explaining a process concept in which phosphorus in waste water is removed through adsorption in a process of the advanced processing unit shown in FIG. 1.
3 is a view for explaining the time required for treating wastewater through adsorption.
4 is a view for explaining a two-stage advanced processing unit for performing a two-stage advanced processing according to a comparative example of the present invention.
5 is a view for explaining the result of treating the waste water through the adsorption according to the two-stage advanced treatment process of FIG.
FIG. 6 is a view for explaining a phenomenon in which a metal hydroxide is coated on a support in the advanced treatment process illustrated in FIGS. 1 and 4.
7 is a view for explaining an advanced processing unit for performing an advanced processing process according to an embodiment of the present invention.
FIG. 8 is a view for explaining a phenomenon in which a metal hydroxide is coated on a support in the advanced processing unit of FIG. 7.
9 is a view showing the amount of pollutants adsorbed on the adsorption media depending on the adsorption equilibrium concentration.
10 is a view showing the relationship between the adsorption equilibrium concentration and the position (height) of the adsorption medium according to the wastewater treatment facility of the present invention.
11 is a flowchart illustrating a wastewater treatment method according to an embodiment of the present invention.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, only the embodiments are to make the disclosure of the present invention complete, and those skilled in the art to which the present invention pertains. It is provided to fully inform the scope of the invention, and the invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

1 is a view showing a wastewater treatment facility for wastewater treatment according to a comparative example of the present invention. Referring to FIG. 1, the wastewater treatment facility 100 includes a primary treatment unit 110, a secondary treatment unit 120, a sludge treatment unit 130, an advanced treatment unit 140, and disinfection sterilization. The process unit 150 is included.

Referring to FIG. 1, inflow water including waste water flows into the primary treatment process unit 110 to perform primary treatment. The treatment process of the primary treatment unit 110 is headwork (screening), screening (bar rack), bar (com rack), comminutor (grit removal), sedimentation tank (sedimentation tank) and It may include a treatment process using at least one of floatation, and may correspond to a single process or a combination of a plurality of processes.

After the processing of the primary processing unit 110, the processing of the secondary processing unit 120 is performed. The treatment process of the secondary treatment unit 120 may be aerobic or anaerobic suspended-growth strain, aerobic or anaerobic attached-growth strain, biological nutrition-removal ( nutrient-removal modifications, lagoon systems, septic systems, physical-chemical systems, advanced oxidation, membrane filtration and membrane bioreactors bioreactor) may include a treatment process using at least one.

Advanced treatment is performed by the advanced treatment process unit 140 on the treated effluent water of the secondary treatment process unit 120, and sludge treatment process unit 130 is treated to sludge generated in the secondary treatment process unit 120. Sludge treatment process is carried out.

In the treatment process of the advanced treatment unit 140, a coagulant may be injected and the phosphorus in the waste water may be removed by using a metal hydroxide (eg, MOH and M may be any metal) generated through the coagulant injection. The concept of treatment through adsorption is described in more detail in FIGS. 2A and 2B.

Disinfection sterilization process 150 is performed on the effluent water in which the advanced treatment process 140 is performed, and the discharge (eg, metal salt residue) that needs to be discarded is fed back to the primary treatment process unit 110 to perform the first treatment again. The process is carried out. The disinfection sterilization process unit 150 disinfects and / or sterilizes the influent.

The sludge treatment process 130 processes sludge, and the sludge treated water is again subjected to the primary treatment process 110.

2A and 2B are views for explaining a process concept in which phosphorus in waste water is removed through adsorption in the process of the advanced processing unit 140 shown in FIG. 1. Referring to FIG. 2A, the metal hydroxide 220 generated by reacting with the wastewater through the flocculant injection is coated 200 on the support 210, and the wastewater passes through the wastewater from the lower side to the upper direction 240. ) Is removed. In this case, the support 210 may correspond to sand.

The reaction scheme in which phosphorus 230 is removed in the wastewater through the metal hydroxide 220 is represented by Chemical Formula 1 below, and the coagulant may correspond to a metal salt (eg, ferric chloride).

As shown in FIG. 2B, phosphorus in the waste water may be removed by reaction with the metal hydroxide 220 coated on the support 210.

3 is a view for explaining the time required for treating wastewater through adsorption. The adsorption process requires the required reaction time between the adsorption media (i.e., the adsorbent with the metal hydroxide coated on the support) and the waste water, which Figure 3 illustrates.

Referring to FIG. 3, for example, when the concentration of the pollutant contained in the waste water is 1 mg / L before the reaction, the reaction time between the adsorption medium and the waste water is about 4 minutes and the concentration of the pollutant is about 0.3 mg / L, about 10 minutes. At 0.1 mg / L, 0.05 mg / L for 14 minutes, and nearly 0 mg / L for more than 20 minutes.

However, in the case of the comparative example of FIG. 1, since the time required for the reaction is insufficient because phosphorus needs to be removed by adsorption after the metal hydroxide is formed on the site and attached to the support, a two-stage advanced treatment process as shown in FIG. 4 may be introduced. Can be.

4 is a view for explaining a two-stage advanced processing unit for performing a two-stage advanced processing according to a comparative example of the present invention. Referring to FIG. 4, the second stage advanced processing unit 400 may include a first reaction unit 141 and a second reaction unit 142.

The primary reaction process unit 141 injects a coagulant into a filter paper including a support (eg, sand), generates a metal hydroxide produced by reacting with wastewater through the coagulant injection, and generates the metal hydroxide salt to the support. The coated adsorption media can be reacted with wastewater to adsorb / filter and remove phosphorus in the wastewater. In this case, the effective diameter of the sand particles may correspond to 0.9mm and uniformity coefficient (uniformity coefficient) may correspond to 1.5.

The metal hydroxide and phosphorus in the waste water react in a molar ratio of 5: 1 to 40: 1, and the metal of the flocculant is soluble manganese (Mn), aluminum (Al), zinc (Zn), copper (Cu) or iron (Fe). ) Can be used, in particular iron being the representative flocculant when targeting phosphorus (P) and arsenic (As).

The process of the secondary reaction process unit 142 may be performed the same process as the process of the primary reaction process unit 141.

FIG. 5 is a view for explaining a time required for treating wastewater through adsorption according to the two-stage advanced treatment process of FIG. 4. Referring to FIG. 5, the experiment was performed from December 14 to February 10, and shows the concentration of total phosphorus (P: Phosphorus) according to the experiment time of the first stage and the second stage. .

Phosphorus concentrations below the standard concentration (0.05 mg / L) were obtained on January 8 using the single stage advanced treatment process, but below the reference concentrations (0.05 mg / L) using the two stage advanced treatment processes. Phosphorus concentration of was obtained immediately. In the two-stage advanced treatment process, since the adsorption of the metal hydroxide and phosphorus is carried out twice, the reaction time required for the adsorption can be secured, thereby obtaining a phosphorus concentration below the reference concentration.

FIG. 6 is a view for explaining a phenomenon in which a metal hydroxide is coated on a support in the advanced treatment process illustrated in FIGS. 1 and 4. In the advanced treatment process illustrated in FIGS. 1 and 4, when a coagulant is injected, the metal hydroxide 220 is formed to be coated on the plurality of supports 210, and the wastewater passes from the lower portion to the upper portion 240, and the phosphorus in the wastewater ( 230 is removed. However, when the coagulant is injected to produce the metal hydroxide 220, the metal hydroxide 220 is concentrated on the lower portion of the support as shown in FIG. 6, thereby causing head loss and causing causality. The contact time of the adsorbent is short, there is a problem that does not secure the time required for adsorption. Thus, wastewater treatment facilities as shown in FIG. 7 are introduced.

7 is a view for explaining an advanced processing unit for performing an advanced processing process according to an embodiment of the present invention. Referring to FIG. 7, the advanced processing unit 140 includes an adsorptive filter paper 610, an adsorption media supply unit 620, and an adsorption media recovery recovery unit 630.

The adsorption filter paper 610 includes an adsorption media 611 coated with a metal hydroxide on a support. In this case, the metal hydroxide is not produced by adding a coagulant (eg, a metal salt) to the adsorptive filter paper 610, but may be prepared in advance and coated on the support, and the support may correspond to sand. In addition, the metal hydroxide metal salt may include manganese (Mn), aluminum (Al), zinc (Zn), copper (Cu) activated alumina, titanium (Ti) or iron (Fe).

However, a coagulant may be added to the adsorptive filter paper 610 to further generate a metal hydroxide to be coated on the support.

When the wastewater is introduced through the wastewater inlet (not shown), the adsorptive filter paper 610 is filled with the adsorption media, so that the phosphorus in the wastewater may be adsorbed and filtered through the wastewater discharge unit (not shown). In this case, the adsorption filter paper 610 may be designed such that the waste water flows from the lower portion of the adsorption filter paper 610 to the upper portion. That is, the waste water inlet (not shown) may be located below the adsorption filter paper 610, and the waste water discharge part (not shown) may be located above the adsorption filter paper 610, but the scope of the present invention is limited thereto. It doesn't happen.

The adsorption media recovery regeneration unit 630, when the adsorption media is out of performance by continuously removing contaminants such as phosphorus through the adsorption, and recovers the adsorption media with the best performance, remove the solids attached to the adsorption media The adsorption media can be regenerated.

The adsorption media recovery recovery unit 630 may send the regenerated adsorption media to the adsorption media supply unit 620.

The adsorption medium supply unit 620 may additionally supply the adsorption media when the adsorption media with the best performance are recovered by the adsorption media recovery recovery unit 630 and the adsorption media is insufficient. In this case, the supplied adsorption media includes an adsorption media formed by coating a metal hydroxide on a support in advance, and a regenerated adsorption media supplied from the adsorption media recovery recovery unit 630.

The adsorption media supply unit 620 may supply the adsorption media from the upper portion of the adsorption filter paper 610 to the lower portion, and the adsorption media recovery recovery unit 630 is the adsorption of performance under the adsorption filter paper 610 The media can be discharged. As a result, the adsorption media supplied from the adsorption media supply unit 620 may perform the adsorption reaction while sequentially moving from the top to the bottom.

Continuous adsorption media may be discharged / supplemented through the adsorption media supply unit 620 and the adsorption media collection recovery unit 630.

FIG. 8 is a view for explaining a phenomenon in which a metal hydroxide is coated on a support in the advanced processing unit of FIG. 7. In the advanced processing unit 140 of FIG. 7, the metal hydroxide 220 is generated in advance, and then coated on the plurality of supports 210 to prepare adsorption media. Unlike the adsorption media of FIG. 6, the adsorption media shown in FIG. 8 is covered with the metal hydroxide 220 as a whole, so that the contact time required for adsorption can be ensured. It can process phosphorus.

9 is a view showing the amount of pollutants adsorbed on the adsorption media depending on the adsorption equilibrium concentration. Referring to FIG. 9, the amount of contaminants adsorbed on the adsorption media increases as the adsorption equilibrium concentration increases. In other words, the higher the adsorption equilibrium concentration, the greater the amount of contaminants adsorbed.

However, since the adsorption equilibrium concentration means the concentration of treated water discharged after adsorption, when the adsorption performance is maximum (or higher), it is not possible to secure a low concentration of water quality, and to solve the wastewater treatment of the present invention. A facility is needed.

10 is a view showing the relationship between the adsorption equilibrium concentration and the position (height) of the adsorption medium according to the wastewater treatment facility of the present invention.

Referring to FIG. 10, the adsorption media discharged have high adsorption equilibrium concentrations, that is, maximum adsorption performance because the adsorption media with the highest concentration of contaminants meets the adsorption media just before the exhaustion. It will be discharged in one condition. That is, the first introduced waste water will have the highest contaminants, and the adsorption media located at the bottom of the adsorptive filter paper 610 (0 m in height 10) adsorbs the first introduced waste water and then is discharged.

The contaminants of the influent wastewater move from the lower part of the adsorption filter paper 610 to the upper part to achieve the adsorption equilibrium in each step. The adsorption media 611 of the upper part of the adsorption filter paper performs adsorption at the lowest adsorption equilibrium concentration. Excellent water quality can be secured.

In addition, the adsorption medium 611 is moved to the lower step by step because the contact with the waste water having a high concentration of contaminants is eventually discharged after exhibiting the maximum adsorption performance. Therefore, the wastewater treatment facility of the present invention has the advantage of ensuring the best water quality while maximizing the performance of the adsorption media.

11 is a flowchart illustrating a wastewater treatment method according to an embodiment of the present invention. The wastewater treatment method of FIG. 11 may be performed through the wastewater treatment facility 100 shown in FIG. 1.

Referring to FIG. 11, a primary treatment process is performed on wastewater flowing into a wastewater treatment facility (S100). In this case, the primary treatment process is a headwork (screening), bar rack (bar rack), comminutor (grit removal), sedimentation tank (floating) and float (flotation) It may include a treatment process using at least one, and may correspond to a single process or a form in which a plurality of processes are combined.

Next, a secondary treatment process is performed on the treated water of the primary treatment process (S200). At this time, aerobic or anaerobic suspended-growth deformation, aerobic or anaerobic attached-growth deformation, biological nutrient-removal deformation, lagoon system ), A treatment process using at least one of a septic system, a physical-chemical system, advanced oxidation, membrane filtration, and a membrane bioreactor. can do.

Next, the phosphorus in the treated water of the secondary treatment step is removed using the adsorption filter paper filled with the adsorption media in advance (S300). In this case, the adsorption medium is coated with a metal hydroxide salt on a support (eg, sand), the metal hydroxide salt is prepared in advance and coated on the support. In addition, the metal hydroxide metal salt may include manganese (Mn), aluminum (Al), zinc (Zn), copper (Cu) activated alumina, titanium (Ti) or iron (Fe).

Next, sterilization and sterilization of the filtered outflow water (S400).

Accordingly, a single process structure in which filtration and adsorption are simultaneously performed in the wastewater treatment facility is provided, and excellent water quality can be secured while maximizing the performance of the adsorption media.

As described above, optimal embodiments have been disclosed in the drawings and the specification. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not used to limit the scope of the present invention as defined in the meaning or claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Advanced processing unit 140, adsorption filter paper 610,
Adsorption media 611, adsorption media supply unit 620,
Adsorption Media Recovery Regeneration Unit (630)

Claims (12)

Waste water inlet for introducing waste water;
Adsorptive filter paper for treating the wastewater introduced through the wastewater inlet through adsorption and filtration; And
A wastewater discharge part for discharging the effluent treated by the adsorptive filter paper,
The adsorptive filter paper includes a plurality of supports, and the adsorption mediator which covers the metal hydroxide over the entirety of the plurality of supports is filled before the wastewater inflow, thereby treating the wastewater using the adsorption media. The wastewater treatment plant of claim 1, wherein
And an adsorption filter medium supply unit connected to the adsorption filter paper to supply the adsorption filter medium to the adsorption filter paper. The wastewater treatment facility of claim 2, wherein
And an adsorption media recovery regeneration unit connected to the adsorption filter paper to discharge the adsorption media having the standard adsorption performance from the adsorption filter paper when the adsorption media has the standard adsorption performance, and regenerating the adsorption media having the standard adsorption performance. Wastewater treatment facility. The method of claim 3, wherein the adsorption medium recovery recovery unit
Wastewater treatment facility for returning the regenerated adsorption media to the adsorption media supply unit. The method of claim 4, wherein
The adsorption media supply unit supplies the adsorption media from the upper side of the adsorption filter paper to the lower side, and the adsorption media recovery regeneration unit receives the adsorption media with the standard adsorption performance from the lower part of the adsorption filter paper and is filled with the adsorption filter paper. Wastewater treatment facility for performing the adsorption reaction while sequentially moving from the upper to the lower portion of the adsorption filter paper. The method of claim 1,
The metal of the metal hydroxide salt is a wastewater treatment facility comprising any one of iron, aluminum, activated alumina and titanium. An inflow step of introducing waste water;
A treatment step of treating the introduced waste water through adsorption and filtration; And
A discharge step of discharging the effluent treated in the treatment step,
The treatment step, the wastewater treatment method comprising the step of treating the waste water by using the adsorption filter paper filled with the adsorbent filter medium containing a plurality of supports and the metal hydroxide coated on the whole of the plurality of supports before the waste water inflow. The method of claim 7, wherein the wastewater treatment method
The wastewater treatment method further comprising the step of supplying the adsorption media to the adsorption filter paper. The method of claim 8, wherein the wastewater treatment method
When the adsorption media filled in the adsorption filter paper has the standard adsorption performance, discharging the adsorption media having the standard adsorption performance from the adsorption filter paper; And
The wastewater treatment method further comprising an adsorption media recovery recovery step of regenerating the adsorption media having the standard adsorption performance. The method of claim 9, wherein the adsorption media recovery recovery step
And returning the regenerated adsorption media to the adsorption media supply unit that performs the adsorption media supply step to supply the regenerated adsorption media again in the adsorption media supply step. The method of claim 10,
The adsorption media supply step is to supply the adsorption media from the top of the adsorption filter paper to the bottom, and the adsorption media recovery recovery step is to receive the adsorption media having the standard adsorption performance from the bottom of the adsorption filter paper to the adsorption filter paper. Waste water treatment method for filling the adsorption media to perform the adsorption reaction while sequentially moving from the top to the bottom of the adsorption filter paper. The method of claim 7, wherein
The metal of the metal hydroxide salt is a wastewater treatment method comprising any one of iron, aluminum, activated alumina and titanium.

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