KR101581315B1

KR101581315B1 - Physical and chemical waste water treatment apparatus

Info

Publication number: KR101581315B1
Application number: KR1020150082612A
Authority: KR
Inventors: 이경섭
Original assignee: 이경섭
Priority date: 2015-06-11
Filing date: 2015-06-11
Publication date: 2015-12-30

Abstract

The present invention relates to a physico-chemical wastewater treatment apparatus, and more particularly, to a wastewater treatment apparatus capable of precipitating vapors and other foreign matter contained in wastewater originating from an automatic or manual car wash and injecting primary and secondary coagulation chemicals, The present invention relates to a physicochemical wastewater purification treatment capable of further increasing the purification treatment of wastewater originating from an automatic or manual car wash, as well as removing sludge converted to coagulated sludge from waste oil, as well as a sterilization process in final treatment water.
In order to achieve this, the present invention is characterized in that wastewater originating from an automatic or manual car wash is introduced, and a sinkwater tank 210 is installed at one side of the water separation wall 212 and an inflow collector 200 An oil outflow blocking block 211 for blocking the waste oil contained in the wastewater from passing to the next stage; and a water level sensing unit 210 for sensing the amount of wastewater flowing into the water level control tank 220, A waste water pressure feed line 222 provided with a waste water pump P for feeding the wastewater into the second step 221 and the next step of the incoming wastewater; The polymer stored in the chemical chamber 320 is supplied with the medicine from the second pump P2 provided in the second supply line 321 and the flocculant settler 500 for increasing the flocculability of the sludge (500) is provided with a stirring blade 511 and a sludge collecting hop bar 530 provided at the lower part to facilitate collection of sludge. The flocculant 500 is connected to the bag filter 600 in the next stage, (TP) capable of pumping primary treatment water treated in the coagulation sedimentation tank (500) and feeding it to the bag filter (600) is provided in the sludge collecting hopper (530) A sludge line SL having a sludge pump SP capable of transporting the collected sludge to the sludge filter 700 and a sludge line SL having a primary treatment A bag filtering filter 602 for filtering the residual contaminants remaining in the water or a part of the discharged sludge and other foreign matter, and the bag filter 600 remaining in the secondary treatment water flowing in the bag filter filter 600 at the next stage And an ultraviolet sterilizer 811 for sterilizing Escherichia coli and the like A processing tank 800 is divided into an ultraviolet disinfection chamber 810 and a storage tank 820 for storing ultraprocessed water and a sludge filter 700 is provided with a desorption unit In the physicochemical wastewater treatment apparatus 100 including the return line 703,
(PAC) stored in the first coagulation agent chamber 310 of the drug supply unit 300 is supplied to the wastewater by pumping the first pump P1 provided in the first supply line 311, A mixer unit 400 for causing a physical chemical reaction to mix waste oil and inorganic pollutants and waste oil particles with the wastewater and transporting wastewater to the coagulation sedimentator 500, A mixer housing (401) including a vortex induction plate (402) having a conveying screw shape so as to increase the reactivity of the mixer housing (401);
In the vicinity of the stirring vane 511, a sedimentation induction plate 520 having a funnel shape and divided into a plurality of sections is provided in order to guide the vortical circulation to the upper and lower sides when the wastewater is stirred and to increase the flocculation and sedimentation property of the sludge after the completion of the stirring. ;
The coagulation sediment generator 500 is provided with a water level sensing unit 540 having a low level sensing sensor 541 and a high level sensing sensor 542. The low level line TL- The automatic opening and closing valve A is opened by the instruction value inputted by the automatic control unit in accordance with the detection signal of the low water level sensor 541 so that the process water pump TP can control the treatment water by the bag filter 600 The automatic open / close valve B provided in the high-level line TL-H is opened by the input value of the automatic control unit according to the monitoring signal of the high water level sensor 542, Means for pumping treatment water to the bag filter (600);
The bag filter housing 701 provided in the sludge filter 700 includes a bag filter bag 702 for reducing the sludge moisture content.

Description

[0001] The present invention relates to a physical and chemical waste water treatment apparatus,

The present invention relates to a physico-chemical wastewater treatment apparatus, and more particularly, to a wastewater treatment apparatus capable of precipitating vapors and other foreign matter contained in wastewater originating from an automatic or manual car wash and injecting primary and secondary coagulation chemicals, The present invention relates to a physico-chemical wastewater treatment apparatus capable of increasing the purification treatment of wastewater originating from an automatic or manual car wash, as well as removing sludge converted to coagulated sludge from waste oil, as well as a sterilization process in final treated water.

As well known, as the economy grew, the number of mechanized equipment in automobiles and military units increased rapidly, resulting in a number of disadvantages instead of convenience. The representative examples were pollution problems, traffic congestion, traffic injuries, waste oil, waste tires Waste material generation, and wastewater due to car wash.

There have been many developments in the double car wash field. In the past, car wash was carried out by hand. However, recently, automation devices that automatically wash within 5 minutes have been developed with the driver sitting in the driver's seat. However, since the wastewater treatment apparatus has not been developed to meet such a demand, the car wash wastewater has a large amount of synthetic detergent such as oil, a large amount of wastewater, If it is discharged without proper purification due to the inclusion of soil, it will cause serious pollution of the water environment and it will act as a main cause of destroying the ecosystem.

In recent years, as a prior art for purifying such pollutants and improving the quality of discharged water and recycling them, as disclosed in Korean Patent No. 10-1431325, The sludge separated from the sand in the settling tank is transferred through the water pipe to store the oil and the water, the water stored in the water sludge tank is pumped by the pumping action, and at the same time, the primary sludge An inlet chamber having an outlet for transferring to a needle bar as a pre-process, a filtering chamber provided at the upper portion of the inlet chamber for separating the flowing water into filtration agent, a suction pipe for adsorbing oil at one side of the barrier membrane provided above the filtration chamber, A surfactant input chamber for removing floating oil, and a surfactant inlet chamber for discharging the drain water 1, it consists of the drain water and whole fresh water having an outlet for transporting the second outlet and the second primary sludge sediment twos.

However, in the above case, the water separated from the sand and the water in the sedimentation tank is transferred through the water pipe when it is transferred to the water separation tank. Since there is no special device for partially removing the waste oil in the water pipe, The means for separating the sand separated from the waste water and the means for the water separation tank for storing the effluent are not significantly different from each other. Therefore, in addition to the sedimentation tank, a further water separation tank is installed in the purification treatment apparatus, thereby increasing the installation cost of the purification treatment apparatus and securing a large installation space.

In addition, the effluent starts from the settling tank and is fed to the inflow chamber through the water tank, which has the disadvantage of slowing the pumping speed of the effluent.

When the oil stored in the oil bubble digestion tank is pumped to the inflow chamber by the pumping action, the transfer pipe for guiding the oil is directly fed to the inflow chamber without the device for removing the waste oil. And the components of the effluent water sent to the inlet chamber are the same.

Therefore, in addition to this, in addition to the water separation tank, an additional inflow chamber increases the installation cost of the purification treatment apparatus and requires a large installation space.

In addition, the sludge filtered by the filtration chamber provided in the upper portion of the inflow chamber is provided with a discharge port for transporting the sludge to the settling tank in the previous stage, and the sludge conveyed to the inflow chamber entrance is mixed with the sludge to be transported It is a defect. Therefore, if the flowing water from the car wash and the returned sludge and effluent are simultaneously introduced into the settling tank, the function of the settling tank becomes inevitably deteriorated because it is accommodated more than the desalting capacity of the settling tank.

If the treated water is discharged to the first and second discharge ports of the discharge segregation tank, various bacteria remaining in the treated water are not sterilized but are discharged to the outside, thereby polluting the river.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide an automatic sewing machine and a flow rate adjusting tank for dividing an inflow house into which wastewater originated from an automatic or manual car wash, An oil outflow blocking block for blocking the transfer of the waste oil contained in the wastewater to the flow rate adjusting tank and an oil water separating wall are provided so that the sedimentation tank is primarily filtered with the waste oil and the waste oil. .

According to the present invention, when the wastewater is filled in the flow rate adjusting tank, the water level sensing unit is sensed, and in the automatic control unit, the wastewater pump feeds the wastewater to the mixer unit by the wastewater pump provided in the wastewater feed line between the flow rate adjusting tank and the coagulating sedimentation tank, Based aluminum coagulant (PAC) into the waste water to coagulate the particles of the existing or existing machine contaminants or the remaining waste oil.

In addition, in the coagulating precipitator of the present invention, when a polymer agglomerating agent is further added and an agitator for agitating the introduced wastewater is operated, wastewater is circulated by a plurality of precipitation induction plates adjacent to the stirring wing, And the precipitation induction plate is inclined at the precipitation time after the completion of the stirring to increase the sedimentation speed and increase the flocculation and sedimentation property of the sludge.

In the bag filter of the present invention, a bag filter filter cloth is provided to filter out a small amount of residual contaminants remaining in the primary treated water discharged from the coagulation sediment discharge in the previous stage or a part of the discharged sludge and other foreign substances, And the like.

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In addition, an ultraviolet sterilizer or an ozone sterilizer is provided in the treatment collecting modification of the present invention, and the coliform bacteria remaining in the secondary treatment water discharged from the bag filter at the previous stage are sterilized with ultraviolet rays or ozone and stored in a storage tank To reuse or discharge the treated water.

Also, in the sludge filter of the present invention, the sludge collected in the previous step of flocculation sedimentation is separated by the bag filter filter cloth to reduce the sludge water content, System.

In order to achieve the above object, according to the present invention, a wastewater originating from an automatic or manual car wash is introduced, and a wastewater collection tank (220) The oil spill interruption block 211 for blocking the waste oil contained in the wastewater from passing to the next stage is provided in the settling tank 210 and the water level control unit 220 for detecting the inflow amount of wastewater A waste water pressure feeding line 222 provided with a waste water pump P for feeding the sensing unit 221 and the wastewater flowing in the next stage to the next stage of the inflow collector 200, A polymer stored in the coagulation agent chamber 320 is supplied to the second pump P2 provided in the second supply line 321 and the coagulation precipitator 500 for increasing the flocculation property of the sludge The coagulating sedimenter (500) is provided with an agitator The agitator 510 having the half vane 511 and the sludge collecting hop bar 530 provided below the sludge collecting hopper 530 to easily collect the sludge, (TP) capable of pumping primary treatment water treated in the flocculation settler (500) and feeding the treated water to the bag filter (600) while providing a water inlet (TL), and the sludge collecting hopper 530 are provided with a sludge line SL having a sludge pump SP so that the collected sludge can be transported to the sludge filter 700 and the sludge line SL flowing into the bag filter housing 601 provided in the bag filter 600, A bag filter filter 602 for filtering a residual contamination source remaining in the primary treated water or a part of the discharged sludge and other foreign matter; a secondary filter 606 for filtering the secondary treated water introduced from the bag filter filter 600 in a subsequent stage of the bag filter 600; The ultraviolet sterilizer 811 for sterilizing the remaining Escherichia coli The ultraviolet ray disinfection chamber 810 having ultrapure water and ultrapure water and a storage tank 820 for storing ultraprocessed water and a sludge filter 700 for returning the talli water to the settling tank 210 (703), characterized in that the waste water treatment apparatus
(PAC) stored in the first coagulation agent chamber 310 of the drug supply unit 300 is supplied to the wastewater by pumping the first pump P1 provided in the first supply line 311, A mixer unit 400 for causing a physical chemical reaction to mix waste oil and inorganic pollutants and waste oil particles with the wastewater and transporting wastewater to the coagulation sedimentator 500, A mixer housing (401) including a vortex induction plate (402) having a feed screw shape so as to increase the reactivity of the mixer housing (401);
In the vicinity of the stirring vane 511, a sedimentation induction plate 520 having a funnel shape and divided into a plurality of sections is provided in order to guide the vortical circulation to the upper and lower sides when the wastewater is stirred and to increase the flocculation and sedimentation property of the sludge after the completion of the stirring. ;
The coagulation sediment generator 500 is provided with a water level sensing unit 540 having a low level sensing sensor 541 and a high level sensing sensor 542. The low level line TL- The automatic opening and closing valve A is opened by the instruction value inputted by the automatic control unit in accordance with the detection signal of the low water level sensor 541 so that the process water pump TP can control the treatment water by the bag filter 600 Means for pumping,
The automatic open / close valve B provided in the high-level line TL-H is opened by the input value of the automatic control unit according to the monitoring signal of the high water level sensor 542, (600);
The bag filter housing 701 provided in the sludge filter 700 is provided with a bag filter bag 702 for reducing the sludge moisture content.

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As described above, according to the present invention, the wastewater originating from a car wash or the like is prevented from moving the sediment and the waste oil which are settled in the settling tank, and thus, only the sand is precipitated in the wastewater and the waste oil is prevented from being transferred to the next stage have. Further, in the present invention, the coagulating agent is added to the wastewater through one or two stages to coagulate particles of oil, inorganic or waste oil contained in the wastewater to obtain sludge, and the sludge is classified so that the purification of wastewater becomes higher.

1 and 2 are a side view and a plan view of a physico-chemical wastewater treatment apparatus of the present invention. 3 is a block diagram of a physico-chemical wastewater treatment apparatus of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 to 3, the physicochemical wastewater treatment apparatus 100 includes an inflow collector 200 partitioned by a sedimentation tank 210 and a flow control tank 220, a first and a second coagulation agent A mixer unit 400 supplied with the first coagulation agent stored in the first coagulation agent chamber 310, a second coagulation agent chamber 310 connected to the second coagulation agent chamber 310, (500) for receiving the secondary coagulation agent stored in the flocculation reactor (320), a bag filter (600) for receiving the primary treatment water treated in the coagulation precipitator (500), a bag filter And a sludge filter 700 for reducing the water content by introducing the sludge collected in the flocculant sediment collector 500. The sludge filter 700 is a water treatment tank for collecting the final treated water, .

The first and second coagulation agent chambers 310 and 320 are connected to the first and second supply lines 311 and 321 and the first and second supply lines 311 and 321 are connected to the first and second supply lines 311 and 321, 1, and a secondary pump P1 (P2) are provided.

The sedimentation tank 210 is composed of an oil outflow blocking block 211 for preventing the oil from entering the waste oil filling step contained in the wastewater, and an oil water separating wall 212 for partitioning the next step.

The flow rate control tank 220 is provided with a water level sensing unit 221 having a low level sensing sensor 221a for sensing the amount of wastewater flowing in and a high level sensing sensor 221b.

The wastewater pump P is disposed in the mixer unit 400 between the flow rate adjusting tank 220 and the coagulation sedimentator 500 and for feeding the wastewater in the flow rate adjusting tank 220 to the mixer unit 400, And is coupled to the pressure feeding line 222.

Here, the vortex induction plate 402 is accommodated in the mixer unit 400 in the mixer housing 401.

An agitator 510 is disposed at the center of the agitator 500 and a stirring vane 511 driven by the agitator 510 is disposed in the center of the agitator 500, And a bottom surface of the coagulating sedimentator 500 is formed as an inclined surface, and a sludge collecting hopper 530 (hereinafter, referred to as " sludge collecting hopper ") is disposed at the center of the inclined surface to collect the sludge. And a water level sensing unit 540 for sensing the water level of the wastewater flowing into the flocculation sediment 500. The water level sensing unit 540 includes a low water level sensor 541 and a high water level sensor 542, ).

Between the coagulating sedimenter 500 and the bag filter 600, the primary treated water treated in the coagulation sedimentator 500 is pumped to the bag filter 600 by pumping the treatment water pump TP The treatment water line TL is provided with a water treatment line TL so that the water treatment line TL can be transported to the treatment water line TL while the low water level line TL- The automatic opening / closing valve B is provided.

The bag filter 600 is accommodated in the bag filter housing 601 to filter the residual contaminants remaining in the primary treated water or a part of the sludge and other foreign substances flowing out.

The treated water collection unit 800 finalizes the secondary treated water treated in the bag filter unit 600, and one side of the treated water collection unit 800 is provided with sterilized coliform bacteria remaining in the secondary treated water An ultraviolet sterilizing chamber 810 provided with an ultraviolet sterilizer 811 provided for the ultraviolet sterilizer 811 provided to the other side of the ultraviolet sterilizing unit 811 is provided at the other side of the ultraviolet sterilizing unit 800 for discharging purified water, And a pump 822.

The sludge collected in the sludge collecting hop bar 530 is pumped by the sludge pump SP between the sludge collecting hop bar 530 and the sludge filter 700 so that the sludge is pumped by the sludge filter 700, A bag filter bag 702 for reducing the water content of the sludge introduced into the bag filter housing 701 provided in the sludge filter 700 and a bag filter bag 702 for controlling the sludge moisture content by the bag filter bag 702 And a tearing water conveyance line 703 for conveying the tearing water generated when the tearing water is reduced to the settling tank 210 in the previous stage.

As shown in FIG. 1, the wastewater from the car wash is introduced into the needle set 210 of the influent collecting unit 200, The foreign matter is settled on the bottom surface, and the waste oil contained in the waste water is blocked by the oil outflow blocking block 211 and the oil water separating wall 212.

The wastewater which is trapped in the settling tank 210 is filtered by the flow rate adjusting tank 220. When the wastewater transferred from the flow rate adjusting tank 220 is filled with the wastewater, The wastewater pump 221b operates the wastewater pump P in the wastewater discharge line 222 according to the instruction value input from the automatic control unit (not shown), and the wastewater is sent to the mixer unit 400 by pressure. In this process, lightweight soil is deposited on the bottom surface of the flow control tank 220.

When the wastewater is fed to the mixer unit 400, the polymeric aluminum coagulant (PAC) coagulant stored in the first coagulant chamber 310 is supplied to the mixer unit 400 in accordance with an instruction of the automatic controller, Is pumped by pumping of the primary pump P1 in the supply line 311. Therefore, the particles of oil, mineral pollutants or waste oil contained in the wastewater are mixed with the coagulant supplied, and the wastewater and the PAC are mixed by the vortex of the transfer mixer, and then moved forward to the flocculant sedimentation unit 500 .

When the wastewater and the PAC are introduced into the sludge coagulation sedimentator 500, the polymer flocculant stored in the second flocculation agent chamber 320 is discharged from the second supply line The second pump P2 in the second pump 321 is pumped into the coagulating sedimentator 500 and the stirrer 510 is operated to rotate the stirring wing 511. At this time, the operation time of the agitator 510 is operated within a range of 5 to 10 minutes after the pumping is completed, from the start of pumping. Also, the sludge reacted with the wastewater by the funnel-shaped precipitation inducing plate 520 provided at a predetermined distance from the stirring wing 511 is guided to the upper and lower sides while circulating in vortex, so that the coagulation sedimentation property of the sludge is increased.

As described above, the sludge formed by the agitation of the stirring blade 511 and the sludge inducing action of the precipitation inducing plate 520 in the coagulating sedimentator 500 starts to be collected in the sludge collecting hopper bar 530, The accumulation time is 30 to 50 minutes, and sludge collection is finished.

The low water level sensor 541 and the high water level sensor 542 detect the water level according to the level of the primary treated water purified in the coagulation sedimentator 500, The detected signal is sent to the automatic control unit, and the automatic control unit controls the automatic opening / closing valve provided in the high-level line TL-H according to the inputted indication value, (B) is opened, and at the same time, treated water flows into the bag filter (600) by operation of the treatment water pump (TP).

When the process water is sensed at the height of the low water level sensor 541, the sensed signal is sent to the automatic control unit, and the automatic control unit controls the automatic opening / closing valve A provided in the low level line TL- And at the same time, the treatment water is introduced into the bag filter 600 in the direction of the bag filter 600 by the operation of the treatment water pump TP.

Therefore, the automatic opening / closing valve A and the automatic opening / closing valve B are alternated according to the inflow amount and the water level of the wastewater flowing into the coagulating sedimentator 500.

As described above, the primary treated water transferred to the bag filter 600 filters the remaining residual contaminants or some of the outflowed sludge and other contaminants by the bag filter filter cloth 602 in the bag filter housing 601, The difference process number is generated.

The secondary treatment water is discharged from the bag filter 600 and flows into the ultraviolet sterilizing chamber 810 of the treatment collecting crystal 800 to sterilize the remaining coliform bacteria and the like by the ultraviolet sterilizer 811, The treated water is conveyed to the storage tank 820 and agitated by the air agitator 821, and at the same time, discharged to the nature by the discharge pump 822 or used as recycled water.

The sludge discharge of the flocculant sediment is performed by the sludge pump SP provided in the sludge line portion SL by the instruction of the automatic control unit after discharging purified water from the upper portion of the sludge filter 500, The sludge pumped by the sludge filter 700 is reduced in moisture content of the sludge by the bag filter filter cloth 702, and the generated sludge is transferred to the sedimentation tank 210 of the previous stage by the sludge water conveyance line 703, .

The processing time of the physicochemical wastewater treatment apparatus 100 from the inflow collection fixture 200 through which the wastewater flows in to the treated wastewater collection unit 800 which is finally treated is one hour.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

In addition, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims.

Accordingly, all such appropriate modifications and changes, and equivalents thereof, should be regarded as within the scope of the present invention.

100: Physico-chemical wastewater treatment apparatus 200: Inflow house correction
210: Needle 220: Flow control tank
300: medicine supply part 400: mixer part
500: coagulating sedimentation 600: bag filter filter
TL: Process water line 700: Sludge filter
800: Processing collection correction 810: Ultraviolet sterilization chamber
820: Storage tank

Claims

An inflow collector 200 including a flow rate control tank 220 is provided on the other side of the sedimentation tank 210 at one side of the wastewater discharged from the automatic or manual car wash at the boundary of the water separation wall 212, (210) is provided with an oil outflow blocking block (211) for blocking the waste oil contained in the wastewater from passing to the next step, a water level sensing part (221) for sensing the inflow amount of the wastewater into the flow rate adjustment tank (220) A waste water pressure feed line 222 provided with a waste water pump P for feeding the waste water to the next stage and a second coagulation agent chamber 320 of the drug feeder 300 at a subsequent stage of the inflow collector 200 There is provided an agglomerated sediment generator (500) for supplying a drug from a second pump (P2) provided in a second supply line (321) to increase the cohesive sedimentation property of sludge, (500) is provided with an agitator (510) having a stirring blade (511) for stirring wastewater, And a sludge collecting hopper 530 provided below the sludge collecting sediment generator 500 to facilitate the collection of the sludge from the flocculation sediment collector 500. A treatment water trough TL is provided between the flocculator 500 and the next stage filtering filter 600, The sludge collecting hopper 530 is connected to the sludge filter 700 through the sludge collecting hopper 530. The sludge collecting hopper 530 is provided with a treatment water pump TP capable of pumping the primary treatment water treated in the sludge collecting hopper 530, A sludge line SL having a sludge pump SP to be able to pressurize the sludge and a residual contamination source remaining in the primary treated water flowing into the bag filter housing 601 provided in the bag filter 600, Sludge and other foreign matters in the bag filter filter 600. In the next step, the ultraviolet sterilizer 811 for sterilizing Escherichia coli remaining in the secondary treatment water introduced from the bag filter filter 600, ) And an ultraviolet sterilizing chamber (810) And a sludge filter (700) is provided with a treatment water collection line (800) partitioned by a storage tank (820) for storing the water, and a tear water conveyance line (703) In the chemical wastewater treatment apparatus (100)
(PAC) stored in the first coagulation agent chamber 310 of the drug supply unit 300 is supplied to the wastewater by pumping the first pump P1 provided in the first supply line 311, A mixer unit 400 for causing a physical chemical reaction to mix waste oil and inorganic pollutants and waste oil particles with the wastewater and transporting wastewater to the coagulation sedimentator 500, A mixer housing (401) including a vortex induction plate (402) having a feed screw shape so as to increase the reactivity of the mixer housing (401);
In the vicinity of the stirring vane 511, a sedimentation induction plate 520 having a funnel shape and divided into a plurality of sections is provided in order to guide the vortical circulation to the upper and lower sides when the wastewater is stirred and to increase the flocculation and sedimentation property of the sludge after the completion of the stirring. ;
The coagulation sediment generator 500 is provided with a water level sensing unit 540 having a low level sensing sensor 541 and a high level sensing sensor 542. The low level line TL- The automatic opening and closing valve A is opened by the instruction value inputted by the automatic control unit in accordance with the detection signal of the low water level sensor 541 so that the process water pump TP can control the treatment water by the bag filter 600 Means for pumping;
The automatic open / close valve B provided in the high-level line TL-H is opened by the input value of the automatic control unit according to the monitoring signal of the high water level sensor 542, (600);
Wherein the bag filter housing (701) provided in the sludge filter (700) includes a bag filter bag (702) for reducing the sludge moisture content.

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