KR101199583B1 - Equipment for treating waste water using integrated membrane-clarification system - Google Patents

Abstract

The present invention relates to a chemical wastewater treatment apparatus using a membrane settling tank. Such a chemical wastewater treatment apparatus, a chemical wastewater tank for aeration of the collected chemical wastewater; A reaction tank connected to the chemical waste water tank and controlling a pH by injecting a base or an acid into the chemical waste water transferred by a waste water transfer pump; An agglomeration tank connected to the reaction tank and into which a flocculant is injected to form a floc; A separation membrane settling tank in which the chemical waste water transferred from the agglomeration tank is accommodated, and a separation membrane module having a plurality of immersion type separation membranes is spaced apart from a bottom surface thereof; A filtration separation water pump for sucking chemical wastewater in the membrane settling tank through the membrane module; Sedimentation sludge pump for discharging the sludge precipitated in the membrane settling tank; A dehydrator for dewatering the sludge transferred to the settling sludge pump; And an activated carbon filter for adsorbing and removing organic substances in the filtrate filtered through the membrane module.

Description

Equipment for treating waste water using integrated membrane-clarification system

The present invention relates to a chemical wastewater treatment device that simplifies the physicochemical wastewater treatment process of power plants and industrial companies and actively copes with environmental regulations.

Wastewater treatment facilities for the physical and chemical wastewater treatment process of conventional power plants and industrial companies, as shown in Figure 1, through the flocculation, sedimentation, filtration, adsorption, and pH adjustment, the wastewater "water and water ecosystem conservation law" Discharge after treatment in accordance with related laws, etc., or recycle to industrial water after reprocessing in recycling facilities.

1 shows a treatment system diagram of a conventional chemical wastewater treatment apparatus.

Referring to FIG. 1, wastewater generated in a power plant and a general industrial company is stored in the chemical wastewater tank 10 and aerated, and then passes through the first and second reaction tanks 20 and 30, and the coagulation aid 40 through the coagulation tank 40. (Polymer) is injected. The floc formed while passing through the first and second reaction tanks 20 and 30 and the coagulation tank 40 is precipitated in the coagulation sedimentation tank 50, and the precipitated sludge is concentrated in the concentration tank 60, the concentrated sludge storage tank 90, and the dehydrator ( Through 100), it is consigned to the final cake state with a water content of 80% or less. The supernatant of the coagulation sedimentation tank 50 is passed through the pressure filter 70 and the activated carbon filter 120 to remove the residue and organic matter. The treated water is reprocessed in a discharge or reuse facility and reused as industrial water.

Specifically, the main functions for each unit process of the conventional chemical wastewater treatment apparatus are as follows.

The chemical wastewater tank 10 stores, aerators, mixes and stabilizes chemical wastewater. The first reaction tank 20 adjusts the pH to meet the optimal flocculation conditions of the flocculant (PAC or Alum).

In the second reaction tank 30, a flocculant is injected in order to generate flocs, which are colloidal suspended solids. The coagulation tank 40 injects a polymer to enlarge the size of the flocs.

Subsequently, in the flocculation settling tank 50, floc is precipitated, and the settling sludge is sent to the concentration tank 60, and the supernatant is stored in the supernatant tank 70 and then transferred to the pressure filter 80. The settling sludge passed through the thickening tank 60 is concentrated in the thickening sludge storage tank 90, and the concentrated settling sludge is transferred to the dehydrator 100.

The pressure filter 80 filters and removes the unprecipitated suspended solids from the coagulation sedimentation tank 50, and the filtered water passed through the pressure filter 80 is stored in the filtrate water tank 110 and then used in the activated carbon filter 120 for adsorption. Organic matter is removed. After passing through the activated carbon filter 120, the pH adjustment tank 130 is discharged or moved to the reuse tank 140 after adjusting the pH of the final discharge water if necessary.

In order to reuse as industrial water, the filtered water stored in the reuse tank 140 is passed through the pretreatment facility 150, the pretreatment tank 160, the electrodialysis equipment 170, and concentrated after passing through the electrodialysis equipment 170 The water is discharged and the treated water is stored in the heavy water bath 180 to be reused for industrial water.

Meanwhile, the dehydrator 100 dehydrates the sludge to reduce the water content of the sludge, and the dehydrated sludge is consigned in the form of a cake.

However, the conventional chemical wastewater treatment apparatus that undergoes such a process is difficult to actively cope with the discharged water quality standards of the "Act on Water Quality and Water Ecosystem Conservation" in Table 1 below, each process step is complicated, and the equipment for each process is It is difficult to secure the site and has the disadvantage of increasing the construction cost and extending the construction period.

division Application Period and Water Quality Standards 2008.1.1 to 2010.12.31 2011.1.1 to December 31, 2012 Since 2013.1.1 Bio Oxygen Demand (BOD) (mg / L) 20 or less 20 or less below 10 Chemical Oxygen Demand (COD) (mg / L) 40 or less 40 or less 40 or less Suspended Solids (SS) (mg / L) 20 or less 20 or less below 10 Total Nitrogen (T-N) (mg / L) 40 or less 40 or less 20 or less Total phosphorus (T-P) (mg / L) 4 or less 4 or less 2 or less Total Coliform (Total Coliform / mL) 3,000 or less 3,000 or less 3,000 or less Ecotoxicity (TU) - - 1 or less

The present invention has been made to solve the problems described above, in particular, by using a membrane sedimentation tank to simplify the chemical wastewater treatment plant, while obtaining a stable good water quality, and also to reduce the required area for installation Its purpose is to provide a chemical wastewater treatment system to shorten the construction period and reduce the construction cost when installing.

Chemical wastewater treatment apparatus using a membrane settling tank according to the present invention for achieving the above object, a chemical wastewater tank for aeration of the collected chemical wastewater; A reaction tank connected to the chemical waste water tank and controlling a pH by injecting a base or an acid into the chemical waste water transferred by a waste water transfer pump; An agglomeration tank connected to the reaction tank and into which a flocculant is injected to form a floc; A separation membrane settling tank in which the chemical waste water transferred from the agglomeration tank is accommodated, and a separation membrane module having a plurality of immersion type separation membranes is spaced apart from a bottom surface thereof; A filtration separation water pump for sucking chemical wastewater in the membrane settling tank through the membrane module; Sedimentation sludge pump for discharging the sludge precipitated in the membrane settling tank; A dehydrator for dewatering the sludge transferred to the settling sludge pump; And an activated carbon filter for adsorbing and removing organic substances in the filtrate filtered through the membrane module.

In addition, it is preferable that a first compressed air nozzle for injecting air from the outside of the separator module to the separator module so as to separate the contaminants attached to the separator module.

In addition, the bottom surface of the membrane settling tank is preferably provided with an inclined surface so that the precipitated sludge is collected.

In addition, it is preferable that the second compressed air nozzle and the water supply nozzle for injecting air and water along the inclined surface to move the sludge deposited on the bottom surface along the inclined surface.

In addition, the membrane settling tank is provided with a cleaning tank for accommodating and cleaning the membrane module, the cleaning tank is preferably provided with a third compressed air nozzle for injecting air to the membrane module.

In addition, the sludge precipitated in the membrane settling tank is transferred to the dehydrator through the sludge conveying pipe, the washing water line for supplying water to the inside of the sludge conveying pipe to prevent the sludge deposition in the sludge conveying pipe is combined. desirable.

In addition, the settling sludge pump, the flow rate flowing into the reaction tank is integrated to set the flow rate when the cumulative flow rate reaches a certain standard, set to run every predetermined time when the set time has arrived, or settling in the membrane settling tank It is preferable to operate by any one of the methods when the thickness of the sludge has reached a certain level.

In addition, the inside of the reaction tank is divided into first and second zones by a first partition wall, the chemical wastewater transported by the wastewater transfer pump is a base or acid is added when passing through the first zone, When passing through the two zones is stirred by the first stirrer, the interior of the coagulation tank is divided into third and fourth zones by the second partition wall, the chemical wastewater flowing from the second zone is the third zone Preferably, the flocculant is added and passed by the second stirrer as it passes through the fourth region.

In addition, the bottom surface of the reaction tank and the coagulation tank is preferably formed of a cone type (Cone type).

In addition, the recycling tank for storing the filtered water passed through the activated carbon filter; A membrane treatment facility for reprocessing the filtered water stored in the reuse water tank; It is preferable to further include a heavy water tank for storing the filtered water treated in the membrane treatment facility.

In addition, it is preferable that the cover is coupled to the upper portion of the membrane settling tank or the reuse tank.

Chemical wastewater treatment apparatus using the membrane settling tank according to the present invention, the conventional complex and multi-stage chemical wastewater treatment process is simplified and actively cope with the environmental regulations, and the effect of improving the water quality of the chemical wastewater treatment to provide.

In addition, it reduces the site required for the installation of chemical wastewater treatment facilities, shortens the construction period required for installation, and provides an effect of reducing construction costs.

1 is a processing system diagram of a conventional chemical wastewater treatment apparatus,
2 is a treatment system diagram of a chemical wastewater treatment apparatus using a membrane settling tank according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating an essential part of FIG. 2.

The present invention relates to a chemical wastewater treatment apparatus for treating chemical wastewater, and more particularly, to a chemical wastewater treatment apparatus for simplifying a treatment process and improving treatment water quality using a membrane settling tank.

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

First, referring to FIG. 2, the chemical wastewater treatment apparatus using the membrane settling tank according to the present invention includes a chemical wastewater tank 210, a reaction tank 220, an agglomeration tank 230, a membrane settling tank 240, and a dehydrator 250. ), Activated charcoal filter 260, waste water transfer pump 310, filtration separation water pump 320, sedimentation sludge pump 330.

The chemical waste water tank 210 is a storage tank in which chemical waste water is collected and collected. The chemical waste water tank 210 equalizes chemical waste water quality and oxidizes COD (Chemical Oxygen Demand) materials. In order to aeration of the chemical waste water using the aeration machine 211.

At this time, a base ( Cautic ) or acid ( Acid ) is injected into the chemical waste water tank 210 for pH control. The aerated chemical wastewater is transferred to the reaction tank 220 by the wastewater transfer pump 310.

The reaction tank 220 is connected to the chemical waste water tank 210, the chemical waste water transported by the waste water transfer pump 310 is stored. The reaction tank 220 controls the pH of the chemical wastewater to an optimal pH for aggregation in order to induce the aggregation of the chemical wastewater.

The base / acid injection pump (not shown) operates according to the pH measured by the pH meter (not shown). The base / acid injection pump is PID (Proportional, Integrated, Differential) controlled in conjunction with the pH meter to prevent over-injection of chemicals and to ensure stable operation.

The reaction tank 220 is provided with a first partition wall 221. The interior of the reaction tank 220 is divided into first and second regions by the first partition wall 221. The base or acid is added when the chemical wastewater transferred by the wastewater transfer pump 310 passes the first region R1, and then stirred by the first stirrer 222 when passing through the second region R2.

Therefore, the short-circuit phenomenon in which the base or acid-injected drug does not react with the chemical wastewater and flows out as it is is prevented. In the present embodiment, the bottom surface of the reaction tank 220 is formed of a cone type (Cone type) to facilitate the collection of sludge.

In the coagulation tank 230, a coagulant (PAC (Poly Aluminum Chloride) or Alum (sulfur sulfate, alum)) is injected by a coagulant injection pump (not shown) to form flocs in the chemical wastewater.

Similar to the reaction tank 220, the coagulation tank 230 is provided with a second partition wall 231. The interior of the coagulation tank 230 is divided into third and fourth areas by the second partition wall 231. In the chemical wastewater flowing from the second region R2 of the reaction tank 220, the flocculant is added when passing through the third region R3, and then the second stirrer is passed when passing through the fourth region R4. 232).

Therefore, the flocculant and the chemical waste water are prevented from flowing out without reacting. In this embodiment, the coagulation tank 230 is formed in a cone type to facilitate the collection of sludge like the reaction tank 220.

The inclination angle of the reaction tank 220 and the coagulation tank 230 formed in a cone type is preferably 30 degrees or more to facilitate the collection of sludge, and the stirring speed of the first and second agitators 222 and 232 is It may be determined in consideration of the shape and power requirements of the impeller, or may be determined through the Computational Fluid Dynamics (CFD) method.

The membrane settling tank 240 is provided to receive the chemical wastewater transferred from the coagulation tank 230 to separate the solid and liquid. The membrane settling tank 240 is spaced apart from the bottom to the membrane module 242 is installed.

As shown in FIG. 3, the separation membrane module 242 is provided with several layers of the immersion type separation membrane 241. Since the separator module 242 is spaced apart from the bottom surface, the sedimentation sludge that sinks to the bottom surface and the membrane module 242 are not disturbed.

In the present embodiment, the immersion type separation membrane 241 may be made of polyvinyl denfluoride (PVDF) or polytetrafluoroethylene (PTFE). Of course, the material of the separator is not limited to the above. The pore size of the immersed separation membrane 241 is appropriately 0.1 ~ 0.4 ㎛. Of course, it is also possible to apply an ultrafiltration (UF) film having a thickness of 0.005 mu m, depending on the type of reuse facility described later.

2 and 3, the chemical wastewater contained in the membrane settling tank 240 is sucked by the filtration water pump 320 and passed through the membrane module 242 to separate the solid and the liquid in the chemical wastewater from each other. .

The outer side of the membrane module 242 is provided with a first compressed air nozzle 243 to separate the contaminants attached to the membrane module 242. The first compressed air nozzle 243 removes contaminants attached to the separation membrane module 242 by injecting air from the outside of the separation membrane module 242 toward the separation membrane module 242.

Then, the cover 240a is coupled to the upper part of the membrane settling tank 240. The cover 240a prevents the chemical waste water from freezing in accordance with the winter temperature decrease, and prevents foreign matters from entering and damaging the membrane module 242.

The filtered water sucked by the filtration water pump 320 and passed through the membrane module 242 is subjected to an activated carbon filter (260). In the activated carbon filter 260, the organic matter remaining in the filtrate is adsorbed and removed.

Of course, the filtered water sucked by the filtered water pump 320 may be temporarily stored in the filtered water tank (not shown). When a filtered water tank is installed, sodium hypochlorite may be injected into the filtered water tank so that green algae are not produced. The sodium hypochlorite is stored in the sodium hypochlorite injection tank and provided to the filtered water tank through a sodium hypochlorite pump.

The filtered water passed through the activated carbon filter 260 is discharged by being discharged to the discharge tank, or is transferred to the reuse tank (270) and passed through a reprocessing facility and reused as industrial water. Hereinafter, the reprocessing facility will be described.

The chemical wastewater treatment apparatus using the membrane settling tank according to the present invention further includes a reuse water tank (270), a membrane treatment facility (280), and a reclaimed water pond (290).

The reuse water tank 270 is a storage tank for storing the filtered water passing through the activated carbon filter 260, and the membrane treatment facility 280 supplies the filtered water stored in the reuse water tank 270 through the reuse water pump 340. It is a facility to receive and reprocess. The membrane treatment facility 280 may use an electrodialysis reversal (EDR) or reverse osmosis (Reverse Osmosis) device.

The cover 270a is coupled to the upper portion of the reuse tank 270. The cover 270a prevents the filtered water from freezing as the temperature decreases in winter, and prevents foreign substances from entering.

After passing through the membrane treatment facility 280, the concentrated water is reprocessed or discharged, the treated water is discharged or stored in the heavy water tank 290, and then supplied to industrial water by the heavy water transfer pump 350.

On the other hand, the sludge precipitated in the membrane settling tank 240 is discharged by the precipitation sludge pump 330 periodically. The settling sludge pump 330 transfers the settling sludge to the dehydrator 250, and the sludge transferred to the dehydrator 250 is dewatered.

The bottom surface of the membrane settling tank 240 is provided with an inclined surface 244 to facilitate the collection of sludge and to facilitate the discharge of sludge by the sedimentation sludge pump 330. The inclination angle of the inclined surface 244 is preferably 30 degrees or more so that the sludge is easily collected.

The second compressed air nozzle 246 and the water supply nozzle for injecting air and water along the inclined surface 244 to move the sludge deposited on the bottom surface of the membrane settling tank 240 along the inclined surface 244 245 is provided.

In addition, the sludge precipitated in the membrane settling tank 240 by the sedimentation sludge pump 330 is transferred to the dehydrator 250 through the sludge transport pipe, wherein the sludge transport pipe to prevent the sludge is deposited A washing water line 249 for supplying water into the sludge conveying pipe is coupled.

The water supplied through the washing water line 249 may use water supplied or discharged from the in-house water system. It is preferable to use the water discharged in order to raise the reuse rate of water.

The sedimentation sludge pump 330 is periodically operated, 1) to accumulate the flow rate flowing into the reaction tank 220, when the accumulated flow rate reaches a predetermined standard, 2) set to operate every predetermined time to set the When the time has arrived, or 3) when the thickness of the sludge precipitated in the membrane settling tank 240 reaches a predetermined level, it is configured to be operated by any one method.

In order to operate the precipitation sludge pump 330 by the method of 1), 2), or 3), an integrated flow meter, a timer, or a sludge sludge thickness detector is used.

Of course, the sedimentation sludge pump 330 may be configured to be operated by merging two or more of the methods of 1), 2) and 3) or merging all of them. For example, the sedimentation sludge pump 330 may be operated by receiving a signal that comes first of the signal of the accumulated flow rate and the set time signal.

The settling sludge transferred by the settling sludge pump 330 is dewatered in the dehydrator 250. The dehydrator 250 dewaters the sediment sludge having a high water content by a screw press or a filter press method capable of directly dehydrating the sewage sludge.

The water content of the dehydrated cake is treated to 78% or less. Dehydrated cakes are stored in containers and then taken out and processed. In addition, the dehydration liquid drained from the dehydrator 250 is transferred to the chemical waste water tank 210.

On the other hand, the membrane settling tank 240 employed in the present invention further includes a cleaning tank 248.

The cleaning tank 248 is provided in the separation membrane settling tank 240, and accommodates and cleans the separation membrane module 242. The cleaning tank 248 is provided with a third compressed air nozzle 247 for spraying air on the membrane module 242 to remove contaminants.

Operation of the separation membrane module 242 operates the operation, stop, backwash, stop in a single cycle, backwash is performed differently depending on the type and degree of membrane fouling (Membrane Fouling). When the separation membrane module 242 needs cleaning, the immersion type separation membrane 241 is moved to the cleaning tank 248 by one frame for cleaning.

As shown in FIG. 3, the cleaning tank 248 is connected with a third compressed air nozzle 247, an acid supply line, a base supply line, and a NaOCl supply line, and supply amount of compressed air, acid supply amount, and base The supply amount, or NaOCl supply amount, is applied differently depending on the type or extent of membrane contamination.

As such, the chemical wastewater treatment apparatus using the membrane settling tank according to the present embodiment simplifies the process for physicochemical treatment of the chemical wastewater, thereby reducing the installation cost and improving the water quality of the treated water. In order to treat the conventional chemical wastewater, the process is simplified and a stable process water is secured by replacing these functions with a membrane settling tank 240 without separately installing a flocculation settling tank, a supernatant tank, a pressure filter, a concentration tank, and a concentrated sludge storage tank. .

Therefore, it is possible to actively replace the strengthened environmental legislation, and to reduce the construction site by reducing the construction site, and to reduce the construction cost, it is possible to economically treat and reuse the chemical wastewater.

In addition, the first and second partition walls 221 and 231 and the first and second stirrers 222 and 232 are installed in the reaction tank 220 and the agglomeration tank 230 to induce the injected chemicals and the chemical waste water to sufficiently react with each other.

In addition, the bottom surface of the membrane settling tank 240 is provided with an inclined surface 244 to facilitate the collection and discharge of the precipitated sludge, and further, the second compressed air nozzle 246 and the water supply nozzle 245 discharge the sludge. To facilitate.

Then, when the sludge precipitated in the membrane settling tank 240 is transferred to the dehydrator 250 through the sludge transfer pipe, the water supplied through the washing water line 249 prevents the sludge deposited on the sludge transfer pipe to prevent sludge It facilitates the management of the conveying pipe and enables efficient sludge treatment.

In addition, the chemical wastewater treatment apparatus using the membrane settling tank according to the present invention excludes the use of a coagulation aid such as a polymer (Polymer) to facilitate the application of the membrane during the flocculation settling process, the membrane settling tank 240 after the coagulation tank 230 ) To reduce the chemical requirements and enable eco-friendly treatment.

In addition, the present invention can directly reuse the treated water or reused as industrial water through a reuse facility, thereby increasing the water reuse rate and providing an effect of actively coping with water shortages in the future.

In the above, the present invention has been described in detail with reference to preferred embodiments, but the present invention is not limited to the above embodiments, and various modifications may be provided without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

210. Chemical waste water tank 211 ... Aeration
220 ... reaction tank 221 ... first partition wall
222 ... First stirrer 230 ... Coagulation tank
231 ... Second partition wall 232 ... Second stirrer
R1 ... first area R2 ... second area
R3 ... third area R4 ... fourth area
240 ... Membrane Precipitator 241 ... Immersion Type Membrane
242 ... membrane module 243 ... first compressed air nozzle
244 ... slope 245 ... water supply nozzle
246 ... 2nd compressed air nozzle 247 ... 3rd compressed air nozzle
248 washing tank 249 washing water line
240a, 270a ... Cover 250 ... Dehydrator
260 ... activated carbon filter 270 ... recycling tank
280 Membrane Treatment System
310 ... Waste water transfer pump 320 ... Filtration water pump
330 ... settling sludge pump 340 ... reused water pump
350 ... heavy water feed pump

Claims (11)

A chemical waste water tank 210 for aeration of the collected chemical waste water;
A reaction tank 220 connected to the chemical waste water tank 210 to control a pH by injecting a base or an acid into the chemical waste water transferred by the waste water transfer pump 310;
An agglomeration tank 230 connected to the reaction tank 220 and into which a flocculant is injected to form a floc;
A separation membrane settling tank 240 in which the chemical wastewater transferred from the agglomeration tank 230 is accommodated, and a separation membrane module 242 having a plurality of immersion type separation membranes 241 is spaced apart from a bottom surface thereof;
A filtration separation water pump 320 for sucking the chemical wastewater in the membrane settling tank 240 to pass through the membrane module 242;
Precipitating sludge pump 330 for discharging the sludge precipitated in the membrane settling tank 240;
Dehydrator 250 for dewatering the sludge transferred to the sedimentation sludge pump 330; And
Includes; activated carbon filter 260 for adsorbing and removing organic matter in the filtered water filtered through the membrane module 242,
The separation membrane settling tank 240 is provided with a cleaning tank 248 for receiving and cleaning the separation membrane module 242, and the cleaning tank 248 is a third compressed air nozzle for injecting air to the separation membrane module 242 247 is provided,
The inside of the reaction tank 220 is divided into first and second regions by the first partition wall 221, and the chemical wastewater transferred by the wastewater transfer pump 310 is connected to the first region R1. Base or acid is added when passing, and stirred by the first stirrer 222 when passing through the second region R2,
The interior of the coagulation tank 230 is divided into third and fourth regions by the second partition wall 231, and the chemical wastewater flowing from the second region R2 passes through the third region R3. When the flocculant is added and is passed by the second stirrer (232) when passing through the fourth region (R4) chemical wastewater treatment apparatus using a membrane settling tank. The method of claim 1,
In order to separate the contaminants attached to the membrane module 242, the first compressed air nozzle (243) for injecting air from the outside of the membrane module 242 toward the membrane module 242 is characterized in that it is provided Chemical wastewater treatment device using membrane settling tank. The method of claim 1,
The bottom surface of the membrane settling tank 240 is a chemical wastewater treatment apparatus using a membrane settling tank, characterized in that it comprises an inclined surface 244 so that the precipitated sludge is collected. The method of claim 3,
A second compressed air nozzle 246 and a water supply nozzle 245 are provided to inject air and water along the inclined surface 244 to move the sludge deposited on the bottom surface along the inclined surface 244. Chemical wastewater treatment apparatus using a membrane settling tank characterized in that. delete The method of claim 1,
The sludge precipitated in the membrane settling tank 240 is transferred to the dehydrator 250 through the sludge conveying pipe, the washing water line for supplying water to the sludge conveying pipe to prevent the sludge deposited in the sludge conveying pipe. Chemical wastewater treatment apparatus using a membrane settling tank, characterized in that (249) is combined. The method of claim 1,
The sedimentation sludge pump 330,
1) When the flow rate flowing into the reaction tank 220 is accumulated and the accumulated flow rate reaches a predetermined standard,
2) It is set to run every fixed time and the setting time arrives, or
3) When the thickness of the sludge precipitated in the membrane settling tank 240 reaches a predetermined level,
Chemical wastewater treatment apparatus using a membrane immersion tank, characterized in that the operation by any one of the methods. delete The method of claim 1,
The reaction tank 220 and the bottom surface of the coagulation tank 230 is a chemical waste water treatment apparatus using a membrane sedimentation tank, characterized in that formed in a cone type (Cone type). The method of claim 1,
A recycling water tank 270 for storing the filtered water passing through the activated carbon filter 260;
A membrane treatment facility 280 for reprocessing the filtered water stored in the reuse water tank 270;
Chemical wastewater treatment apparatus using a membrane settling tank further comprises a heavy water bath (290) for storing the filtered water treated in the membrane treatment facility (280). The method of claim 10,
Chemical wastewater treatment apparatus using a membrane settling tank, characterized in that the cover is coupled to the upper portion of the membrane settling tank 240 or the reuse tank 270.

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