KR20180008074A - waste water continual system and method using integrity purification chemical - Google Patents

Abstract

The present invention relates to a wastewater treatment system using an IPC method, which comprises a solid-liquid separator having: a first rapid precipitator installed to make solid-liquid separation when wastewater is introduced, discharge first sludge separated, and supply first treated water to a first concentration dehydrator; a first concentration dehydrator installed to make solid-liquid separation of the first treated water introduced from the first rapid precipitator, supply the second sludge separated to a first compression dehydrator, and separately collect the second treated water into a treated water storage tank; a first compression dehydrator installed to make solid-liquid separation of the second sludge introduced from the first concentration dehydrator, supply third sludge separated to a first press filter dehydrator, and separately collect third treated water into the treated water storage tank; and a first press filter dehydrator installed to make solid-liquid separation of the third sludge introduced from the first concentration dehydrator, discharge separated sludge cake, and separately collect fourth treated water into the treated water storage tank. The present invention is able to remarkably enhance efficiency of water treatment.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste water treatment system using IPC,

The present invention relates to a wastewater treatment system, and more particularly, to a wastewater treatment system using an IPC method in which a sludge having a water content greatly reduced by repeatedly treating sludge and treated water produced by rapidly precipitating wastewater and separating a high- ≪ / RTI >

Today, industrial wastewater is generated in industrial sites with the development of industries. Such industrial wastewater, together with household wastewater generated in the home, is a major cause of polluting the water quality. Water pollution caused by such wastewater is an important factor that pollutes the environment together with air pollution and soil pollution.

Therefore, the wastewater treatment system is strictly regulated to purify wastewater and discharge it. The wastewater flowing from the wastewater treatment system is separated into suspended solids and treated water in the initial settling basin, and these solids and treated water are passed through the additional treatment apparatus one or more times, the solid matter is made into a sludge cake, Water is discharged through water purification facilities.

However, the sludge obtained by dewatering wastewater by a conventional wastewater treatment system has a water content similar to the following [Table 1].

Kinds anaerobe
Digested sludge Expiration
Digested sludge Inorganic sludge Organic sludge Livestock manure Waste water Moisture content (%) 82 ~ 85 85 ~ 87 69 ~ 75 85 ~ 87 83 ~ 85

This water content is the most difficult factor to recycle the sludge and it is very costly to recycle the sludge.

Particularly, there is a problem that not only the amount of sludge cake with such a high moisture content is large but also a large cost is required for disposal due to a general method (ocean dumping and composting).

Korean Patent Publication No. 10-1999-004620 (published May 5, 1999) Korean Patent Publication No. 10-2001-0079118 (published on Aug. 22, 2001) Korean Utility Model Registration No. 20-0272604 (Announcement of Apr. 18, 2002) Korean Registered Patent No. 10-1081302 (issued on November 11, 2011)

An object of the present invention, which is devised to overcome the above-mentioned problems, is to provide a wastewater treatment system using an IPC method, which discharges sludge having a low water content from an incoming wastewater and further discharges sludge by reprocessing the treated wastewater And a method.

In order to achieve the above-mentioned object, the wastewater treatment system using the IPC method according to the present invention is configured to perform solid-liquid separation when waste water flows in, discharge the separated primary sludge, and supply the primary treatment water to the first concentration- First rapid settling; A first concentrating and dehydrator for separating the primary treated water introduced from the first rapid sedimentation tank into solid-liquid separation, supplying the separated secondary sludge to the first squeeze-dehydrator, and separately collecting the secondary treated water into the treated water storage tank; A first squeeze dehydrator installed to separate solid-liquid separation of the secondary sludge introduced from the first condenser-dehydrator, supply the separated tertiary sludge to the first press-filter dehydrator, and separately collect the tertiary- And a first press filter dehydrator for separating the third sludge introduced from the first condenser-dehydrator into solid-liquid, discharging the separated sludge cake, and separately collecting the fourth-order treated water into the treated water storage tank .

A first pressurized float tank installed to supply the separated fifth treated water to the bioreactor and to supply the DAF scum to the second concentrator and dehydrator; A bioreactor installed to separate the solidified liquid of the fifth treated water flowing in the first pressurized floatation tank, to supply the separated concentrated sludge to the second pressurized floating tank, and to supply the sixth treated water to the second rapid precipitator; A second rapid sedimentation tank installed to discharge the sixth treated water introduced from the bioreactor into solid-liquid separation, supply the separated concentrated sludge to the second pressurized floating tank, and discharge the seventh treated water; A second concentrating and dehydrator for separating the DAF scum introduced from the first pressurized float tank by solid-liquid separation, supplying the separated sludge to the second squeeze-dehydrator, and discharging the treated water; A second squeeze-dewatering device for solid-liquid separation of the sludge introduced from the second condenser-dehydrator, for discharging the separated sludge, and for discharging the treated water; And a second press filter dehydrator (200) provided in the second squeezing and dehydrator for solid-liquid separation of the sludge introduced thereinto, discharging the separated sludge, and discharging the treated water, 2 pressure floatation tank is installed to bioreactor and the concentrated sludge introduced from the second rapid sedimentation into solid-liquid separation and re-input to the bioreactor.

Meanwhile, a method of treating wastewater with a wastewater treatment system using an IPC method includes a tenth step (S10) of solid-liquid separation of wastewater into a first rapid precipitator; An eleventh step (S11) of discharging the primary sludge introduced in the first rapid sedimentation; A twelfth step (S12) of solid-liquid separation of the primary treated water flowing in the first rapid precipitation with the first concentrating dehydrator; A thirteenth step (S13) of solid-liquid separation of the secondary sludge introduced from the first rapid sedimentation tank into the first squeezing dehydrator; (S14) of solid-liquid separation of the tertiary sludge introduced from the first squeeze-dewatering device into a first press filter dehydrator; and a step (S14) of discharging the sludge cake introduced from the first press filter dehydrator through an eleventh step Step 15 (S15).

In addition, the secondary treatment water, the tertiary treatment water and the fourth treatment water discharged in the twelfth step (S12), the thirteenth step (S13) and the fourth step (S14) are collected and subjected to solid-liquid separation with the first pressurized floating tank Step 15 (S15); Step 16 (S16) of solid-liquid separation of the fifth-order treated water introduced from the first pressurized float tank into the bioreactor; A seventeenth step (S17) of solid-liquid separation of the sixth-order treated water introduced from the bioreactor into the second rapid precipitator; An eighteenth step (S18) of discharging the seventh-order treated water discharged in the sixteenth step (S16) and the seventeenth step (S17); Step S19 of solid-liquid separation of the concentrated sludge introduced in the sixteenth step S16 and seventeenth step S17 into the second pressurized floatation tank; 20) S20 (S20) of solid-liquid separation of the DAF scum flowing in step S15 into the second condenser-dehydrator; A twenty-first step (S21) of solid-liquid separation of the sludge introduced from the second condenser-dehydrator with a second squeeze-dehydrator; (S22) of separating the sludge introduced from the second squeeze-dewatering device into a second liquid by a second press-filter dehydrator (S22); discharging the sludge discharged from the second pressurized floatation tank of the second press- Step 23 (S23).

As described above, according to the present invention, the wastewater is rapidly precipitated in a rapid precipitator to perform solid-liquid separation, and the separated treated water is continuously reprocessed by the concentrator dehydrator, the compression dehydrator and the first press filter dehydrator, And it is possible to achieve a removal efficiency of the suspended solids of 90% or more.

In addition, it is possible to remarkably improve the water treatment efficiency by continuously water-treating the treated water treated in the primary treatment water again continuously using a pressurized floating tank, a bioreactor, a rapid sedimentation tank, a condensation dehydrator and a crimping dehydrator, It is effective.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to further the understanding of the technical idea of the invention, Should not be interpreted.
1 and 2 are block diagrams schematically illustrating a wastewater treatment system using an IPC method according to a preferred embodiment of the present invention.
3 is a perspective view schematically illustrating the rapid precipitator shown in Fig.
FIG. 4 is a view showing the operation state of the rapid precipitator of FIG. 2. FIG.
5 and 6 are photographs showing the state of solid-liquid separation of lake water and coal wastewater by the rapid precipitator of FIG.
Figs. 7 and 8 are views schematically showing the first condensing dehydrator and the compression dehydrator shown in Fig. 1. Fig.
Figs. 9 and 10 are flowcharts showing a method of treating wastewater using the system of Figs. 1 and 2. Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the detailed description of known functions and configurations incorporated herein will be omitted when it may unnecessarily obscure the subject matter of the present invention.

<Configuration>

1 and 2, the wastewater treatment system using the IPC method according to the present invention comprises a solid-liquid separator 100 for separating wastewater into sludge and primary treated water, And a treatment water treatment apparatus 200 for purifying the sludge by separating the sludge from the separated primary treatment water.

The solid-liquid separator 100 includes a first rapid precipitator 110, a first concentrator 120, a first squeeze dewater 130, and a first press filter dehydrator 140.

The first rapid precipitator 110 is made to accelerate the solid-liquid separation by rapidly separating and precipitating the mixed particles in the wastewater by increasing the fluid velocity and using the particle acceleration and the gravity. The first rapid precipitator 110 has a sedimentation speed of about 40 to 50 times faster than conventional sedimentation, and has a mounting area of only about 2.5% as compared with conventional sedimentation. The first rapid precipitator 110 includes a main body 111, an ejector 112, a venturi tube 113, a filter 114, and a discharge tube 115 as shown in FIG.

First, the main body 111 is composed of a wide upper portion and an inclined lower portion that gradually becomes narrower. A venturi tube 113 installed to guide the wastewater supplied from the ejector 112 to an approximately intermediate portion of the main body 111, And a discharge pipe 115 for discharging the primary treatment water that has passed through the filter 114 is installed. When the primary sludge accumulates at a certain height and reaches a predetermined downward pressure after the solid sludge separated from the wastewater discharged from the venturi pipe 113 is deposited, the outlet is opened and discharged to the outside.

The ejector 112 is a device for supplying waste water stored outside to the inside of the main body 111 at a high speed. The ejector 112 is installed to supply the wastewater to the main body 111 at a higher speed and supply the wastewater to the venturi pipe 113.

The venturi pipe 113 is installed such that the wastewater supplied from the ejector 112 is lowered down to a height at which the sludge S is accumulated at the bottom of the main body 111 as much as possible. The venturi pipe 113 may be installed to discharge the wastewater discharged from the ejector 112 to the inner space of the main body 111. Therefore, the wastewater that has passed through the venturi pipe 113 may be equal to or higher than the velocity of the wastewater that has passed through the ejector 112.

The filter 114 separates the sludge S from the bottom of the main body 111 and is installed to filter the primary treated water located in the upper layer than the sludge S. 3 and 4, the filter 114 is disposed at the edge of the upper end side of the main body 111, and the primary treatment water having passed through the filter 114 is discharged to the discharge pipe 115 Can be installed. In other words, the filter 114 is installed so that the primary treatment water must pass through the filter 114 and be discharged to the discharge pipe 115. At this time, the suspended matter contained in the primary treatment water is filtered by the filter 114.

Further, the discharge pipe (115) is provided on the side of the upper end side portion of the main body. The discharge pipe 115 is arranged such that the primary treatment water having passed through the filter 114 flows into the first concentrator 120.

If the velocity of the wastewater flowing into the venturi pipe 113 from the ejector 112 is 10 mm / s, the first rapid precipitator 110 passes through the venturi pipe 113, ) May be at least 10 mm / s. At this time, the sludge S contained in the wastewater also precipitates and accumulates at 10 m / s or more, and the rate at which the primary treated water other than the settled sludge S flows inside the main body 111 may be about 1 mm / s have. When the primary treatment water reaches a predetermined height or more, the water passes through the filter 114 and flows to the discharge pipe 115. When passing through the filter 114, the suspended substances contained in the primary treatment water are filtered. In the case of the coal wastewater, as shown in FIG. 6, the wastewater to the left of the coal wastewater can be treated as the treated water, There is more water treatment function than expected to confirm that it is treated as sludge on the right side. The first rapid precipitator 110 configured as described above can be applied to wastewater containing 0.01 to 0.5% suspended solids to separate liquid and solid components and then concentrate to about 2 to 5%. In addition, the first rapid precipitator 110 of the present invention can accelerate and precipitate at a very high speed (5 mm / sec) compared to the sedimentation rate (0.28 mm / sec) of existing gravity settlers, It is possible to accelerate at a speed of ~ 15 mm / sec, so that very rapid particle separation can be possible.

The first rapid precipitator 110 is composed of a movable device, which is very simple to install. The installation area is only 2.5% of the existing settling basin, and the necessary process is installed without removing the existing facility to dramatically improve the water treatment efficiency . In addition, the installation cost is very low, which can drastically reduce the operating cost of sedimentation basin, can be continuously operated with continuous treatment, is simple in structure, It is possible to achieve more than 90% of the removal efficiency of suspended substances, thus dramatically improving the subsequent water treatment efficiency, and the excellent separation of inorganic wastewater (muddy water) generated at construction sites (tunnel construction, civil engineering and construction) The wastewater that has passed through the first rapid sedimentation unit 110 is 99% suspended solids (SS), 75-90% BOD / COD, , TN (total nitrogen): 40 to 60%, TP (total phosphorus): 90% or more can be removed.

Meanwhile, the first concentrator 120 is a device for re-separating the sludge contained in the primary treatment water discharged from the first rapid precipitator 110. The first concentrator 120 may be a conventional derating machine (Dewatering M / C) as shown in FIG. This diverting machine typically flows along the bottom inflow pipe and flows into the slot screen while being primarily agglomerated, and is separated into the secondary sludge and the secondary treatment water in the lower agglomeration and concentration section, And is dewatered through the rotating slot screen while rising to the concentrated dewatering section of the upper part by the pressure. In this case, the number of revolutions of the motor for rotating the slot screen so that the primary treatment water stagnates for about 5 to 10 seconds in the coagulation concentration section can be adjusted. Here, the slot screen can be made of a mesh of about 0.3 to 0.5 mm. On the inside of the slot screen, a transfer screw with a brush may be installed to prevent clogging of the slot screen. In addition, the slot screen may be fabricated in the form of an edge-bar for rapid discharge of the secondary treatment water, and a cleaning shower may be installed. The first concentrator 120 may be installed to supply the coagulated sludge to the first squeeze-dewater 130 and to transfer the secondary process water to the treated water storage tank 210 of the treatment water treatment apparatus 200 have.

The first squeeze-dewater 130 is a device for reprocessing the secondary sludge discharged from the first concentrator 120. The first squeezer 130 may be a conventional pneumatic press, as shown in FIG. This pneumatic press consists of a driving part, a vertical screw, a slot screen and a pneumatic unit. This pneumatic press applies pressure while discharging the secondary sludge discharged from the first thickener 120 through the bridge screen to the vertical screw, and the tertiary treatment water separated from the secondary sludge by the pressure pushes the slot screen And is dehydrated. At this time, the pneumatic press may be configured to supply the tertiary treatment water to the treatment water storage tank 210 of the treatment water treatment apparatus 200. In addition, a pressure plate is installed in the lower part so that the sludge is opened when the pressure of the sludge is higher than a predetermined pressure. At this time, a slotted screen may be provided with a transfer screw with a brush attached thereon to prevent clogging of the slot screen, and the slot screen may be formed in the form of an edge-bar for rapid discharge of the third- And a cleaning shower may be installed. Here, the transfer screw can smoothly discharge the secondary sludge while dispersing the pressure so that the aggregation of the secondary sludge is not broken.

As shown in FIG. 9, the first press filter dehydrator 140 is a conventional device for reprocessing the secondary sludge discharged from the first squeeze-dewatering machine 130. The first press filter dehydrator 140 is configured to dehydrate the fourth-order treated water from the secondary sludge, transfer it to the treated water storage tank 210 of the treated water treatment apparatus 200, and discharge the dehydrated tertiary sludge. At this time, the sludge cake as the third sludge can obtain a high solid content having a water content of about 68 ~ 75%.

For example, the water content (%) of the sludge produced by the conventional dewatering equipment is shown in Table 2 below.

Kinds anaerobe
Digested sludge Expiration
Digested sludge Inorganic sludge Organic sludge Livestock manure Waste water Moisture content (%) 82 ~ 85 85 ~ 87 69 ~ 75 85 ~ 87 83 ~ 85

This water content is the most difficult element to recycle the sludge, which adds a great deal of extra cost to the recycling of the sludge, and is also very costly to process in a general manner such as marine dumping and composting.

On the other hand, according to the present invention, the water content (%) of the sludge cake dehydrated using the three-stage dewatering device of the first condenser-dehydrator 120, the first squeezing-dewatering device 130 and the first press- Table 3 shows the results.

Item Analysis Item Analysis Item Analysis Sewage sludge # 1
(Aerobic activated sludge) 76.2 Livestock manure # 1 77.1 Waste water # 1 75.5 Sewage sludge # 2
(Aerobic activated sludge) 75.3 Livestock manure # 2 75.3 Waste water # 2 74.5 Sewage sludge # 3
(Aerobic activated sludge) 77.3 Livestock manure # 3 74.1 Waste water # 3 76.2 Average 76.3 Average 75.5 Average 75.4

In another experiment, the three-stage dewatering system showed a water content of 74% in the case of citrus sludge, a water content of 75% in the case of livestock manure, and 98% in the case of sewage sludge (aerobic activity) The water content was reduced to 76%.

This three-stage dewatering device can utilize a conventional device, and is small, has a narrow installation area, is easy to install, has a very low power consumption, can achieve a water content of 75% or less by continuous concentration dewatering, There are advantages.

2, the treatment water reprocessing apparatus 200 includes a treatment water storage tank 210, a first pressurized floatation tank 220, a bioreactor 230, a second rapid precipitation column 240, A second pressurized dehydrator 250, a second pressurized dehydrator 260, a second pressurized filter dehydrator 280 and a second pressurized floatation vessel 280, DAF.

The treated water storage tank 210 is connected to the second treatment water discharged from the first concentrator 120, the first squeezing dewatering device 130 and the first press filter dehydrator 140 of the solid-liquid separator 100, And is installed to collect the fourth-order treated water. The treatment water storage tank 210 may be provided to supply the treated water to the first pressurized floating tank 220.

The first pressurized floatation tank 220 is installed to solid-liquid-separate the treated water introduced from the treated water storage tank 210. The first pressurized floating vat 220 may be a pressurized floating vat (DAF) manufactured using a conventional floating luminous method. This pressurized floating tank is floated on an ADT (Air Dissolving Tube) for 10 to 20 seconds while raising the inflowed treatment water to a high pressure of about 4.5 to 6.5 kg / cm ² by a pressure pump to make a supersaturated state, And bubbles having an average particle size of 40 to 70 mu m are generated by supplying water to the bioreactor 230 so that the bubbles float in the floating tank or float in combination with the colloidal particles, . For example, the processing efficiency of the pressurized floating tank is about 60% or more, the BOD / COD (chemical oxygen demand) is about 30 to 40%, the TN (total nitrogen) is about 30 To 40%, and NH ₄ -N (ammonia nitrogen-based) to about 30 to 40%. The fifth pressurized floating water generated in the first pressurized floatation tank 220 may be supplied to the bioreactor 230 and the DAF scum may be supplied to the first pressurized dehydrator 130.

The bioreactor 230 is installed to solid-liquid separate the fifth-order treated water introduced from the first pressurized floating tank 220. The bioreactor 230 may be a conventional bioreactor. The bioreactor 230 may be filled with a ball type filling material so that the microorganisms can reproduce well, and the fifth-order treated water can be continuously supplied from the top to the bottom. At this time, the bioreactor 230 can maximize air permeability by allowing air to pass from the lower part to the upper part, and the filling material can be made of a material having a light weight and a large surface area. In addition, the bioreactor 230 can be manufactured in such a structure that the biofilm can be formed in a short period of time and the wafers are prevented from tangling with each other to facilitate the flow of treatment water, and the air can pass through in a short time. The bioreactor 230 is substantially the utilization efficiency of the air inlet is high, the air contact with the inside surface area often from about 1,000 to about 1,500 times that article existing activated sludge, BOD removal amount is from 4 to about decontamination be 12kg / m ² The efficiency is very high. In addition, the bioreactor 230 is easy to install, has a low maintenance cost, can be designed and manufactured according to the contamination concentration of the incoming treated water, has a narrow installation area, has a very low maintenance cost, And it is easy to control the odor because it can be installed indoors. For example, the treatment efficiency of such a bioreactor 230 can be calculated as follows: SS (suspended matter mass) is 58% of the influent SS, BOD (biochemical oxygen demand) is 98% of the incoming BOD, COD (chemical oxygen demand) About 89%, TN (total nitrogen), about 78% of the incoming COD, about 91% of the incoming COD and about 27% of the incoming COD of NH ₄ -N (ammonia nitrogen system) can do. The bioreactor 230 may be installed to supply the sixth treated water generated by the water treatment to the first rapid sediment generator 110 and to supply the concentrated sludge to the second pressurized floating tank 280 via the transfer tank.

The second rapid precipitator 240 is installed to separate the solid-liquid separated from the sixth-order treated water introduced from the bioreactor 230. The second rapid precipitator 240 may have the same configuration as the first rapid precipitator 110 described above. The treatment efficiency of the second rapid precipitator 240 is about 40% or more for SS (suspended solids), 20% or more for BOD / COD (Biochemical Oxygen Demand / Chemical Oxygen Demand), TN 5% or more, NH ₄ -N (ammonia nitrogen-based) is about 5% or more, and TP (total phosphorus) is about 5% or more. The second rapid precipitator 240 may be installed to discharge the generated seventh-order treated water and supply the concentrated sludge to the second pressurized floating tank 280 via the transfer tank.

The second pressurized floatation tank 280 is installed to separate the solidified sludge introduced from the bioreactor 230 and the second rapid sediment generator 240 by solid-liquid separation. The second pressurized floating vat 280 may have the same configuration as the first pressurized floating vat 220 described above. The second pressurized floating tank 280 may be installed to discharge the sludge cake separated from the concentrated sludge and re-supply the treated water to the bioreactor 230.

The second condenser-dehydrator 250 is installed to separate the DAF scum introduced from the first pressurized floatation tank 220 into solid-liquid. The second condenser-dehydrator 250 may have the same configuration as the first condenser 120 described above. The second concentration and dewatering unit 250 may be installed to supply the sludge to the second squeezer 260 after treating the inflow DAF scum, and to discharge the treated water.

The second squeeze-and-dehydrator 260 is installed to separate the sludge introduced from the second condenser-dehydrator 250 into solid-liquid. The second squeeze-dewatering device 260 may have the same configuration as the first squeeze-dewatering device 130 described above. This second squeeze-dewatering device 260 can be installed to supply the concentrated sludge, which is solid-liquid separated from the sludge, to the second press-filter dehydrator 280 and discharge the treated water.

The second press filter dehydrator 280 is installed to separate solid-liquid separated sludge from the second squeeze-dewatering device 260. The second press filter dehydrator 270 may have the same configuration as the first press filter dehydrator 140 described above. This second press filter dehydrator 270 can be installed to discharge the concentrated sludge, which is solid-liquid separated from the sludge, and discharge the treated water.

The second thickener-dehydrator 250 and the second squeezer 260 can rapidly separate the concentrated sludge having a water content of 98% into the concentrated sludge and the treated water quickly at a liquid content of up to 78% within about 5 minutes. The second condensing dewatering unit 250 and the second squeezing unit 260 may be variously configured according to the desired water content of the various types of concentrated sludge.

The first pressurized dehydrator 140, the first pressurized floatation tank 220, the second pressurized floatation tank 120, the first pressurized dehydrator 130, The coagulant may be added to at least one of the first reactor 280, the bioreactor 230, the second rapid precipitator 240, the second concentrator 250 and the second crimp dewaterer 260, In the first pressurized floating tank 220, a flocculant is added to flocculate the particles, thereby increasing the removal efficiency of the sludge.

<Wastewater Treatment Method>

A method of treating wastewater using a wastewater treatment system according to the present invention will be described with reference to Fig.

First, the wastewater is subjected to solid-liquid separation with the first rapid precipitator 110 (S10). Pure wastewater is subjected to solid-liquid separation by the first rapid precipitator (110), and the generated primary treated water can be supplied to the first concentrator (120).

Next, the primary sludge separated from the first rapid precipitator 110 is discharged (S11). The discharged primary sludge can be discarded or recycled.

Next, the first treated water is subjected to solid-liquid separation by the first concentrator 120 (S12). The primary treated water discharged from the first rapid precipitator 110 is subjected to solid-liquid separation by the first concentrator 120, the generated secondary sludge is supplied to the first squeeze-dewater 130, and the secondary treated water is treated Can be separately collected in the storage tank of the water treatment apparatus 200.

Next, the secondary sludge is separated into solid and liquid by the first squeeze-dewatering machine (130) (S13). The secondary sludge discharged from the first concentrator 120 is subjected to solid-liquid separation, the generated tertiary sludge is supplied to the first press filter dehydrator 140, the tertiary treated water is supplied to the storage tank of the treatment water treatment apparatus 200 Can be collected separately.

Next, the tertiary sludge is subjected to solid-liquid separation by the first press-filter-dryer 140 (S14). The third sludge discharged from the first squeeze-dewatering unit 130 is subjected to solid-liquid separation, and the sludge cake, which is the fourth sludge generated at this time, is discharged through the step S11, and the fourth- It can be collected separately in the storage tank.

The solid-liquid separation apparatus 100 can process the process steps S10 to S14, and the following steps S15 to S21 can be processed in the process water reprocessing apparatus 200. [

Next, the secondary, tertiary, and fourth-order treated water are collected and solid-liquid separated into the first pressurized floating tank 220 (S15). Second, third, and fourth treated water collected in the storage tank is supplied to the first pressurized floating tank 220 to perform solid-liquid separation. The fifth treated water generated at this time is supplied to the bioreactor 230, 2 concentrator &lt; / RTI &gt;

Next, the fifth-order treated water is subjected to solid-liquid separation with the bioreactor 230 (S16). The fifth-order treated water discharged from the first pressurized floating tank is subjected to solid-liquid separation with the bioreactor 230. The sixth treated water generated at this time is supplied to the second rapid precipitator 240, and the concentrated sludge is supplied to the second pressurized floating tank (Not shown).

Next, the sixth process water is subjected to solid-liquid separation with the second rapid precipitator 240 (S17). The sixth treated water discharged from the bioreactor 230 is subjected to solid-liquid separation by the second rapid sedimentation equipment 240, and the generated concentrated sludge may be supplied to the second pressurized floating sludge tank 280.

Next, the seventh-order treated water discharged from the second rapid sediment generator 240 is discharged to the discharge or purification facility (S18).

Next, the concentrated sludge introduced in steps S16 and S17 is subjected to solid-liquid separation with the second pressurized floating tank 280 (S19). The sludge cake separated from the second pressurized floating tank 280 can be discharged to the outside, and the treated water can be supplied to the step S16.

Next, the DAF scum discharged in the step S15 is subjected to solid-liquid separation by the second condenser-dehydrator 250 (S20). The treated water generated at this time may be discharged through step S18 and the sludge may be supplied to the second squeeze-dehydrator 260. [

Next, the sludge discharged from the second condenser-dehydrator 250 is subjected to solid-liquid separation by the second squeezer-dehydrator 260 (S21). The treated water generated at this time may be discharged through step S18 and the sludge may be supplied to the second press filter dehydrator 270. [

Next, the sludge introduced from the second squeeze-dewatering machine 260 is separated into solid-liquid by the second press-filter-squeezer 270 (S22). The process number generated at this time can be discharged through step S18.

Finally, the sludge discharged from the second press filter dehydrator 270 is finally discharged to the outside (S23). The final discharged sludge can be discarded or recycled.

As described above, it is to be understood that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the appended claims, rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and equivalents of the claims are to be construed as being included within the scope of the present invention do.

100: Solid-liquid separator
110: 1st fast settling electricity
111: Body
112: Ejector
113: Venturi tube
114: filter
115: discharge pipe
120: 1st condensation dehydrator
130: First crimping dehydrator
140: First press filter dehydrator
200: Reprocessing device
210: treated water storage tank
220: first pressurized floating tank
230: Bioreactor
240: Second quick settler
250: Second concentrating dehydrator
260: Second crimping dehydrator
270: Second press filter dehydrator
280: second pressurized floating tank.

Claims (4)

In a wastewater treatment system,
A first rapid settler 110 installed to supply solid waste to the first concentrator 120 when the wastewater flows therein, to discharge the separated primary sludge, and to supply the first treated water to the first concentrator 120;
The primary treated water flowing in from the first rapid precipitator 110 is subjected to solid-liquid separation, the separated secondary sludge is supplied to the first squeeze-dewatering machine 130, the secondary treated water is supplied to the treated water storage tank 210 A first concentrator 120 installed to collect separately;
The secondary sludge introduced from the first concentrator 120 is subjected to solid-liquid separation, the separated tertiary sludge is supplied to the first press filter dehydrator 140, and the tertiary treated water is separately collected in the treated water storage tank 210 A first squeeze-dewatering device (130)
A first press filter dehydrator 140 installed to separate the tertiary sludge introduced from the first concentrator 120 into solid-liquid separation, discharge the separated sludge cake, and separately collect the fourth-order treated water into the treated water storage tank 210, And a solid-liquid separator (100) having an inlet and an outlet.
The method of claim 1,
The first pressurized water is supplied to the bioreactor 230 to supply the separated fifth-order treated water to the second concentrator-dehydrator 250, A floating tank 220;
The fifth concentrated water introduced from the first pressurized floatation tank 220 is subjected to solid-liquid separation, the separated concentrated sludge is supplied to the second pressurized floatation tank 280, the sixth treated water is supplied to the second rapid sedimentation column 240 A bioreactor 230 installed to supply the bioreactor 230;
The second concentrated sedimentation sludge is supplied to the second pressurized floatation tank 280 and the second rapid sedimentation column 240 installed to discharge the seventh treated water );
A second thickener / dehydrator 250 for solid-liquid separation of the DAF scum introduced from the first pressurized floatation tank 220, supplying the separated sludge to the second squeeze-dewatering device 260, and discharging the treated water;
A second squeeze dehydrator 260 for solid-liquid separation of the sludge introduced from the second concentrating dehydrator 250, discharging the separated sludge to the second press filter dehydrator 270, and discharging the treated water;
And a second press-filter-water discharger (270) installed to discharge solid-liquid separated sludge from the second squeeze-dewatering device (260), discharge the separated sludge, and discharge the treated water. Further comprising:
The second pressurized floatation tank 280 is installed so that the concentrated sludge introduced from the bioreactor 230 and the second rapid precipitator 240 is solid-liquid separated and re-supplied to the bioreactor 230. [ Used wastewater treatment system.
The wastewater treatment method using the wastewater treatment system of claim 2,
A tenth step (S10) of solid-liquid separation of the wastewater into the first rapid precipitator (110);
An eleventh step (S11) of discharging the primary sludge introduced from the first rapid precipitator (110);
A twelfth step (S12) of solid-liquid separation of the primary treated water flowing in the first rapid precipitator (110) into the first thickener (120);
A thirteenth step (S13) of solid-liquid separation of the secondary sludge introduced from the first rapid precipitator (110) into the first squeezer (130);
(S14) of solid-liquid separation of the third sludge introduced from the first squeeze-dewatering machine (130) into a first press filter dehydrator (140)
And a fifteenth step (S15) of discharging the sludge cake flowing in the first press-filter-drainer (140) through an eleventh step (S11). The wastewater treatment method of the wastewater treatment system using the IPC method .
4. The method of claim 3,
The secondary treatment water, the tertiary treatment water and the fourth treatment water discharged in the twelfth step (S12), the thirteenth step (S13) and the fourth step (S14) are collected and transferred to the first pressurized floating tank A fifteenth step (S15) of solid-liquid separation;
(S16) the solid-liquid separation of the fifth-order treated water flowing in the first pressurized floating tank (220) into the bioreactor (230);
A seventeenth step (S17) of solid-liquid separation of the sixth-order treated water introduced from the bioreactor (230) into the second rapid precipitator (240);
An eighteenth step (S18) of discharging the seventh-order treated water discharged in the sixteenth step (S16) and the seventeenth step (S17);
Step 19 (S19) of solid-liquid separation of the concentrated sludge introduced in the sixteenth step S16 and seventeenth step S17 into the second pressurized floating tank 280;
20th step S20 of solid-liquid separation of the DAF scum flowing in the step S15 into the second condenser-dehydrator 250;
A twenty-first step (S21) of solid-liquid separation of the sludge introduced from the second condenser-dehydrator (250) into a second squeeze-dehydrator (260);
A second step (S22) of solid-liquid separation of the sludge introduced from the second squeeze-dewatering device (260) into a second press-filter dehydrator (270)
(S23) of discharging the sludge discharged from the second pressurized filter dehydrator (270) and the second pressurized floating tank (280) of the step (S19). A method for treating wastewater in a treatment system.

Images