JP2005224687A - Method and device for concentrating and separating solid component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device for concentrating and separating solid components by which construction cost and operating cost can be reduced and solid components such as sludge produced in water purification can suitably be concentrated and separated. <P>SOLUTION: Water component in the sludge produced in water purification is sucked via a flat membrane module 3. The sludge is stuck to the outside of the flat membrane module 3 to form a sludge cake layer C. The flat membrane module 3 is pulled up from a sludge treatment tank 2, is exposed to the air, is evacuated from the inside of the flat membrane module 3, and is dewatered. Next, air is blown on the outside of the flat membrane module 3 to peel the sludge cake layer C. The peeled and dropped concentrated sludge is conveyed by a belt conveyer 10, and is heaped in an exhaust tank 11. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method and apparatus for concentrating and separating solid components, and more specifically, a solid that can reduce construction costs and operating costs and can suitably concentrate and separate solid components from water containing solid components (for example, purified water sludge). The present invention relates to a component concentration separation method and apparatus.

The purified water sludge is a solid component in a water purification facility for producing drinking water, which is settled and deposited by adding a flocculant to raw water such as river water and ground water, and a solid component in washing drainage of a filter pond. The concentration of purified water sludge settled and deposited is 0.1 to 2% and contains a large amount of water, so it cannot be disposed of as it is. Therefore, the purified water sludge is led to a facility called thickener, concentrated to 1-8% by gravity, and further concentrated to 40-60% by pressure dehydrator or sun dryer, and then disposed. .
In recent years, instead of the thickener, the pressure dehydrator and the sun dryer, a purified water sludge concentrating / separating apparatus using a membrane module has been proposed (for example, see Patent Documents 1 to 3).

JP 2000-325998 A JP 2001-54800 A JP 2000-15298 A

In the conventional purified water sludge concentration / separation apparatus using thickener or the like, it is possible to concentrate and dehydrate purified water sludge to a high concentration, but there is a problem that the equipment becomes large and construction cost and operation cost are high.
On the contrary, in the conventional purified water sludge concentration / separation apparatus using the membrane module, it is possible to reduce the construction cost and the operation cost, but in order to remove the concentrated sludge adhered to the membrane module and discharge it in water. There is a problem that water is mixed again in the concentrated sludge.
Then, the objective of this invention is providing the solid component concentration separation method and apparatus which can reduce a construction cost and an operating cost, and can concentrate and isolate solid components like purified water sludge suitably.

In a first aspect, the present invention provides an attachment process in which a membrane module is immersed in water containing a solid component, moisture in the water is sucked inside the membrane module, and the solid component is attached to the outside of the membrane module; Dehydration process in which the moisture of the solid component is sucked into the inside of the membrane module and dehydrated while the membrane module to which the component is attached is exposed to the atmosphere, and the solid component attached to the outside of the membrane module in the atmosphere is peeled off The solid component concentration separation method is provided.
In the solid component concentration / separation method according to the first aspect, equipment such as a thickener is not used, so that construction cost and operation cost can be reduced. Moreover, the moisture of the solid component adhering to the membrane module is vacuum-sucked while the membrane module is exposed to the atmosphere, and the concentrated solid component adhering to the membrane module is peeled off from the membrane module while the membrane module is exposed to the atmosphere. Therefore, moisture does not re-mix into the concentrated solid component, and the solid component can be suitably concentrated and separated.

In a second aspect, the present invention provides a solid component concentration / separation method characterized in that, in the solid component concentration / separation method configured as described above, the solid component is purified water sludge, coagulated floc, or a solid component in raw water. .
In the solid component concentration / separation method according to the second aspect, the solid component in the purified water sludge, the aggregated floc and the raw water can be suitably concentrated and separated in the water purification treatment.

In a third aspect, the present invention relates to a membrane module immersed in water containing a solid component, and sucking moisture into the inside of the membrane module immersed in water containing a solid component, and placing the solid component outside the membrane module. Adhering means for adhering, dehydrating means for sucking and dehydrating the moisture of the solid component to the inside of the membrane module in a state where the membrane module to which the solid component is adhered is exposed to the atmosphere, and the membrane module in the atmosphere There is provided a solid component concentrating / separating device characterized by comprising a peeling means for peeling a solid component adhering to the outside.
In the solid component concentration / separation apparatus according to the third aspect, equipment such as a thickener is not used, so that construction cost and operation cost can be reduced. Moreover, the moisture of the solid component adhering to the membrane module is vacuum-sucked while the membrane module is exposed to the atmosphere, and the concentrated solid component adhering to the membrane module is peeled off from the membrane module while the membrane module is exposed to the atmosphere. Therefore, moisture does not re-mix into the concentrated solid component, and the solid component can be suitably concentrated and separated.

In a fourth aspect, the present invention provides a solid component concentration / separation device, wherein the solid component is a purified water sludge, agglomerated flock, or a solid component in raw water in the solid component concentration / separation device having the above-described configuration. .
In the solid component concentration / separation apparatus according to the fourth aspect, the purified water sludge, the aggregated floc, and the solid component in the raw water can be suitably concentrated and separated in the water purification treatment facility.

  According to the solid component concentration / separation method and apparatus of the present invention, it is possible to reduce the construction cost and the operation cost, and it is possible to suitably concentrate and separate the solid component such as purified water sludge.

  Hereinafter, the present invention will be described in more detail with reference to embodiments shown in the drawings. Note that the present invention is not limited thereby.

FIG. 1 is a schematic cross-sectional view illustrating a purified water sludge concentration / separation apparatus 100 according to a first embodiment.
The purified water sludge concentration / separation apparatus 100 includes a purified water sludge water storage tank 1 for storing purified water sludge water in which sedimentary solids are settled and deposited by adding a coagulant to raw water such as river water and groundwater in the sedimentation basin D, and purified water. A purified water sludge treatment tank 2 into which purified water sludge water is introduced from the sludge water storage tank 1 via a purified water sludge water introduction pump 13 and a purified water sludge water introduction valve 12, and a flat membrane module installed inside the purified water sludge treatment tank 2 3, a suction pump 4 for sucking water from the outside to the inside of the flat membrane module 3 through the suction valve 14, a suction tank 5 for storing the sucked water, and the flat membrane module 3 are suspended to move vertically and horizontally The moving crane 6, the vacuum pump 7 that vacuums the inside of the flat membrane module 3 through the vacuum valve 17 and the suction tank 5, and the air inside the flat membrane module 3 through the pressurizing valve 19 A blower 8 for supplying air and ejecting air from the air nozzle 9 through the air diffuser valve 18, a belt conveyor 10 that receives and conveys the concentrated sludge that has been peeled off from the flat membrane module 3 and the concentrated sludge that has been conveyed. The discharge tank 11 to be stored, the purified water sludge water return pump 16 for returning a part of the purified water sludge water in the purified water sludge treatment tank 2 to the purified water sludge water storage tank 1 through the purified water sludge water return valve 15, and the water in the suction tank 5 Is transferred to the outside via the transfer valve 20 and a control device 23 for controlling the overall operation.

  The piping of the flat membrane module 3 and the suction tank 5 and the piping of the flat membrane module 3 and the blower 8 use the flexible hose 22 for the main part, and do not cause any trouble when the flat membrane module 3 is moved vertically and horizontally by the crane 6. It is like that.

FIG. 2 is a sectional view of the flat membrane module 3.
The flat membrane module 3 includes two filtration membranes 31 and a synthetic resin membrane support 32 that supports the filtration membranes 31 from the inside.
When the inside of the flat membrane module 3 is sucked by the suction pump 4, the filtration membrane 31 is deformed so as to be recessed inward because the pressure inside becomes lower than the outside. On the other hand, when air is blown into the inside of the flat membrane module 3 by the blower 8, the pressure on the inner side becomes higher than the outer side, so that it deforms so as to swell outward.

  FIG. 3 shows a purified water sludge water introduction valve 12, a purified water sludge water introduction pump 13, a suction valve 14, a suction pump 4, a purified water sludge water return valve 15, a purified water sludge water return pump 16, a vacuum valve controlled by the control device 23. 17 is a time chart showing operations of the vacuum pump 7, the crane 6, the air diffusion valve 18, the pressurizing valve 19, the blower 8, the transfer valve 20, the transfer pump 21, and the belt conveyor 10.

[initial state]
(1) The purified water sludge treatment tank 2 is empty.
(2) The purified water sludge water introduction valve 12 is closed and the purified water sludge water introduction pump 13 is turned off.
(3) The suction valve 14 is closed and the suction pump 4 is turned off.
(4) The purified water sludge water return valve 15 is closed and the purified water sludge water return pump 16 is turned off.
(5) The vacuum valve 17 is closed and the vacuum pump 7 is turned off.
(6) The crane 6 is turned off in a state where the flat membrane module 3 is suspended and installed inside the purified water sludge treatment tank 2.
(7) The aeration valve 18 is closed, the pressurization valve 19 is closed, and the blower 8 is turned off.
(8) The transfer valve 20 is closed and the transfer pump 21 is turned off.
(9) The belt conveyor 10 is turned off.

[Introduction process T1]
The purified water sludge water introduction valve 12 is fully opened, and the purified water sludge water introduction pump 13 is turned on.
As shown in FIG. 4, purified water sludge water is introduced into the purified water sludge treatment tank 2 from the purified water sludge water storage tank 1 through the purified water sludge water introduction valve 12.
When the purified water sludge water is introduced into the purified water sludge treatment tank 2 to the level where the flat membrane module 3 is immersed as shown in FIG. 5, the control device 23 proceeds to the operation of the adhesion process T2.

[Adhesion process T2]
The purified water sludge water introduction valve 12 is set in a half-open state. Further, the suction valve 14 is opened, and the suction pump 4 is operated in synchronization therewith. Further, the purified water sludge water return valve 15 is set in a half-open state, and the purified water sludge water return pump 16 is operated in synchronization therewith.
As shown in FIG. 5, moisture is sucked from the purified sludge water through the flat membrane module 3 and stored in the suction tank 5. When the water level in the suction tank 5 reaches a certain level, the control device 23 opens the transfer valve 20 and turns on the transfer pump 21 in synchronism with this to store water in a suction water tank (not shown).
As shown in FIG. 6, purified water sludge adheres to the outside of the flat membrane module 3 and a sludge cake layer C is formed.

  If the adhesion process T2 is continued, the thickness of the sludge cake layer C adhered to the outside of the flat membrane module 3 increases as shown in FIG. 7, and the suction pump pressure increases as shown in FIG. When the suction pump pressure reaches a predetermined threshold, the control device 23 turns off the suction pump 4 and closes the suction valve 14. Moreover, the purified water sludge water introduction pump 13 is turned off and the purified water sludge water introduction valve 12 is closed. Further, the transfer valve 20 is closed and the transfer pump 21 is turned off. Further, the purified water sludge water return valve 15 is closed, and the purified water sludge water return pump 16 is turned off. And it progresses to operation | movement of the movement process T3.

In addition, when the elapsed time of the adhesion process T2 reaches a predetermined time, the operation may proceed to the movement process T3.
Further, the thickness or weight of the attached sludge cake layer C is measured (the load applied to the crane 6 is increased), and when the thickness or weight reaches a predetermined upper limit load, the operation proceeds to the movement process T3. Good.

[Movement process T3]
The crane 6 is turned on, and the flat membrane module 3 is pulled up from the purified water sludge treatment tank 2 as shown in FIG. Further, as shown in FIG. 9, the flat membrane module 3 is moved horizontally onto the air nozzle 9. Then, the operation proceeds to the vacuum suction process T4.

[Vacuum suction process T4]
The vacuum valve 17 is opened and the vacuum pump 7 is turned on. As shown in FIG. 9, moisture is vacuum sucked from the sludge cake layer C adhering to the flat membrane module 3 and stored in the suction tank 5, and the concentration of the sludge cake layer C increases. When the water level in the suction tank 5 reaches a certain level, the control device 23 opens the transfer valve 20, turns on the transfer pump 21 in synchronization with it, and stores water in a suction water tank (not shown).
When the elapsed time of the vacuum suction process T4 reaches a predetermined time, the control device 23 closes the vacuum valve 17, turns off the vacuum pump 7, turns off the transfer valve 20, and turns off the transfer pump 21. . And it progresses to operation | movement of peeling process T5.

  Note that the surface state of the sludge cake layer C is visually observed, and when cracks such as cracks are confirmed, the process may proceed to the peeling process T5.

[Peeling process T5]
The air diffuser valve 18 is opened, and the blower 8 is operated with a large air volume in synchronism with it, and air is blown from the air nozzle 9 to the outside of the flat membrane module 3. Further, the pressurizing valve 19 is intermittently opened during the period in which the air diffusion valve 18 is open.
As shown in FIG. 10, the concentrated sludge adhered to the outside of the flat membrane module 3 is peeled off. The peeled concentrated sludge falls on the belt conveyor 10, is transported, and accumulates in the discharge tank 11.

The reason why air is intermittently supplied to the inside of the flat membrane module 3 through the pressurizing valve 19 is that the filtration membrane 31 of the flat membrane module 3 is repeatedly expanded and returned to the outside. This is to make it easier to peel off the attached concentrated sludge.
The flat membrane module 3 may be vibrated by a vibrator (not shown) instead of or in combination with blowing air from the air nozzle 9 to the flat membrane module 3.

  When the elapsed time of the peeling process T5 reaches a predetermined time, the control device 23 turns off the blower 8, closes the air diffuser valve 18 and the pressure valve 19, and turns off the belt conveyor 10. And it progresses to operation | movement of return process T6.

  In addition, the thickness or weight of the adhering sludge cake layer C is measured (the load applied to the crane 6 is reduced), and when the thickness or weight reaches a predetermined lower limit load, the operation returns to the operation T6. You may go on.

[Return process T6]
The crane 6 is turned on, the flat membrane module 3 is moved horizontally and vertically, and suspended in the purified water sludge treatment tank 2 as shown in FIG. As a result, the operation returns to the operation of the adhesion process T2, and the operation after the adhesion process T2 is executed cyclically.

-Experimental results according to Example 1-
In the introduction process T1, purified water sludge water having a concentration of 1% was introduced into the purified water sludge treatment tank 2, and in the adhesion process T2, continuous suction was performed with a suction pump 4 at a membrane filtration flow rate of 1.0 [m / day]. At this time, the turbidity of the membrane treated water stored in the suction tank 5 was 0.1 degrees or less. Suction by the suction pump 4 was stopped when the suction pressure of the suction pump 4 became −0.8 [MPa] 35 hours after the start of suction. Next, in the moving process T3, the flat membrane module 3 was pulled up into the atmosphere by the crane 6 and moved to a predetermined location. The sludge cake layer C adhered to the outer surface of the flat membrane module 3, and the maximum thickness of the sludge cake layer C was about 6 mm. Next, vacuum suction was performed for 30 minutes by the vacuum pump 17 in the vacuum suction process T4. Cracks begin to form in the sludge cake layer C when 3 minutes have elapsed from the start of vacuum suction, and the cracks spread throughout the sludge cake layer C after 10 minutes have passed, and a portion of the sludge cake layer C has peeled off from the flat membrane module 3 Then it was observed that it dropped. Next, an air flow having an air volume of 10 [L / min] per membrane was supplied from the air nozzle 9 to the outer surface of the flat membrane module 3 in the peeling process T5. By this peeling process T5, about 95% of the sludge cake layer C adhered to the flat membrane module 3 could be peeled off. When the peeled concentrated sludge was collected and analyzed, the water content was about 70% and the maximum thickness was 5.5 mm.

FIG. 11 is a schematic cross-sectional view illustrating the coagulation floc concentration separation apparatus 200 according to the second embodiment.
This agglomeration floc concentrating / separating device 200 introduces raw water through a raw water valve 15a, adds a flocculant, and rapidly agitates the agglomerated floc water by agitation to form agglomerated floc water. A slow stirring tank 1b for storing and stirring slowly, an aggregating flock processing tank 2a into which the agglomerated flock water is introduced from the slow stirring tank 1b, a flat membrane module 3 installed inside the aggregating flock processing tank 2a, A suction pump 4 for sucking water from the outside to the inside of the flat membrane module 3 via a suction valve 14, a suction tank 5 for storing the sucked water, and for moving the flat membrane module 3 vertically and horizontally A crane 6, a vacuum pump 7 that vacuums the inside of the flat membrane module 3 through a vacuum valve 17, and an air nozzle 9 through an air diffusion valve 18 to the outside of the flat membrane module 3. A blower 8 for supplying air and supplying air to the inside of the flat membrane module 3 through the pressure valve 19, and a belt for transporting the concentrated and agglomerated floc separated and dropped from the flat membrane module 3 to the discharge tank 11 A conveyor 10 and a discharge tank 11 for storing the condensed and condensed floc that has been transported, a transfer pump 21 for transferring the water of the suction tank 5 to the outside through a transfer valve 20, and a controller 23 for controlling the whole are provided. Yes.
In addition, you may introduce | transduce into the aggregation flock processing tank 2a as it is, without adding a flocculant to raw | natural water. In this case, the rapid stirring tank 1a and the slow stirring tank 1b are unnecessary.

  The piping of the flat membrane module 3 and the suction tank 5 and the piping of the flat membrane module 3 and the blower 8 use the flexible hose 22 for the main part, and do not cause any trouble when the flat membrane module 3 is moved vertically and horizontally by the crane 6. It is like that.

  In addition, you may provide the aggregation floc water return valve and the aggregation floc water return pump for returning a part of the aggregation floc water in the aggregation floc processing tank 2a to the rapid stirring tank 1a.

  FIG. 12 shows the raw water valve 15a, the suction valve 14, the suction pump 4, the vacuum valve 17, the vacuum pump 7, the crane 6, the aeration valve 18, the pressurization valve 19, the blower 8, and the transfer valve controlled by the control device 23. 20 is a time chart showing operations of the transfer pump 21 and the belt conveyor 10.

[initial state]
(1) The rapid stirring tank 1a, the slow stirring tank 1b, and the coagulation flock processing tank 2a are empty.
(2) The raw water valve 15a is closed.
(3) The suction valve 14 is closed and the suction pump 4 is turned off.
(4) The vacuum valve 17 is closed and the vacuum pump 7 is turned off.
(5) The crane 6 is turned off in a state where the flat membrane module 3 is suspended and installed inside the aggregation flock treatment tank 2a.
(6) The aeration valve 18 is closed, the pressurizing valve 19 is closed, the blower 8 is turned off, the transfer valve 20 is closed, the transfer pump 21 is turned off, and the belt conveyor 10 is turned off. Turn off.

[Introduction process T1]
The raw water valve 15a is opened. As shown in FIG. 13, raw water is introduced into the rapid stirring tank 1a through the raw water valve 15a, added with a flocculant, and rapidly stirred to generate agglomerated flock water. The agglomerated floc water flows into the slow stirring tank 1b and is gently stirred. Further, the agglomerated floc water flows from the slow stirring tank 1b into the agglomerated floc treatment tank 2a.
When the aggregated flock water flows into the aggregated flock treatment tank 2a to a level at which the flat membrane module 3 is immersed, the control device 23 opens the raw water valve 15a in a half-open state. And it progresses to operation | movement of the adhesion process T2.

[Adhesion process T2]
The suction valve 14 is opened, and the suction pump 4 is operated in synchronization therewith.
As shown in FIG. 14, the moisture of the aggregated floc water is sucked through the flat membrane module 3 and stored in the suction tank 5. When the water level in the suction tank 5 reaches a certain level, the control device 23 opens the transfer valve 20 and turns on the transfer pump 21 in synchronism with this to store water in a suction water tank (not shown).
As shown in FIG. 15, aggregated flocs adhere to the outside of the flat membrane module 3 to form an aggregated floc cake layer C.

If the adhesion process T2 is continued, the thickness of the agglomerated flock cake layer C adhering to the outside of the flat membrane module 3 increases as shown in FIG. 16, and the suction pump pressure also increases.
When the suction pump pressure reaches a predetermined threshold, the control device 23 closes the suction valve 14, turns off the suction pump 4, closes the transfer valve 20, and turns off the transfer pump 21. And it progresses to operation | movement of the movement process T3.

In addition, when the elapsed time of the adhesion process T2 reaches a predetermined time, the operation may proceed to the movement process T3.
Alternatively, the thickness or weight of the adhered aggregated flock cake layer C may be measured, and when the thickness or weight reaches a predetermined upper limit value, the operation may proceed to the movement process T3.

[Movement process T3]
The crane 6 is turned on and the flat membrane module 3 is pulled up from the aggregation flock processing tank 2a as shown in FIG. Further, the flat membrane module 3 is moved horizontally and moved onto the air nozzle 9. Then, the operation proceeds to the vacuum suction process T4.

[Vacuum suction process T4]
The vacuum pump 7 is turned on and the vacuum valve 17 is opened. Further, the transfer valve 20 is opened, and the transfer pump 21 is turned on in synchronization therewith. Thereby, as shown in FIG. 18, moisture is vacuum-sucked from the aggregated flock cake layer C adhering to the flat membrane module 3 and stored in the suction tank 5, and the concentration of the aggregated flock cake layer C is increased. When the water level in the suction tank 5 reaches a certain level, the control device 23 opens the transfer valve 20, turns on the transfer pump 21 in synchronization with it, and stores water in a suction water tank (not shown).
When the elapsed time of the vacuum suction process T4 reaches a predetermined time, the controller 23 turns off the vacuum pump 7, closes the vacuum valve 17, closes the transfer valve 20, and turns off the transfer pump 21. . And it progresses to operation | movement of peeling process T5.

  Note that the surface state of the agglomerated flock cake layer C may be visually observed, and when a crack such as a crack is confirmed, the operation may proceed to the peeling process T5.

[Peeling process T5]
The air diffuser valve 18 is opened, and the blower 8 is operated with a large air volume in synchronism with it, and air is blown from the air nozzle 9 to the outside of the flat membrane module 3. Further, the pressurizing valve 19 is intermittently opened during the period in which the air diffusion valve 18 is open.
As shown in FIG. 19, the concentrated aggregation floc adhered to the outside of the flat membrane module 3 is peeled off. The peeled concentrated and agglomerated floc falls on the belt conveyor 10, is transported, and accumulates in the discharge tank 11.
The reason why air is intermittently supplied to the inside of the flat membrane module 3 through the pressurizing valve 19 is that the filtration membrane 31 of the flat membrane module 3 is repeatedly expanded and returned to the outside. This is to make it easier to peel off the attached condensed flocs.

The flat membrane module 3 may be vibrated by a vibrator (not shown) instead of or in combination with blowing air from the air nozzle 9 to the flat membrane module 3.
When the elapsed time of the peeling process T5 reaches a predetermined time, the control device 23 closes the air diffuser valve 18 and the pressure valve 19, turns off the blower 8, and turns off the belt conveyor 10. And it progresses to operation | movement of return process T6.

  In addition, the thickness or weight of the adhering aggregated flock cake layer C may be measured, and when the thickness or weight reaches a predetermined lower limit load, the operation may proceed to the return process T6.

[Return process T6]
The crane 6 is turned on, the flat membrane module 3 is moved horizontally / vertically, and suspended in the concentrated flocculation tank 2a as shown in FIG. As a result, the operation returns to the operation of the adhesion process T2, and the operation after the adhesion process T2 is executed cyclically.

-Experimental results according to Example 2-
In the introduction process T1, flocculant (PAC) 10 [mg / L] is added to river water with an average turbidity of 15 degrees, and the agglomerated floc water generated by rapid and slow agitation is introduced into the agglomerated floc treatment tank 2a. In the adhesion process T2, continuous suction was performed by the suction pump 4 at a membrane filtration flow rate of 1.0 [m / day]. At this time, the turbidity of the membrane treated water stored in the suction tank 5 was 0.1 degrees or less. Since the suction pressure of the suction pump 4 became −0.8 [MPa] 192 hours after the suction start (8 days later), the suction was stopped. Next, in the moving process T3, the flat membrane module 3 was pulled up to the atmosphere by the crane 6 and moved to a predetermined place. The concentrated and agglomerated flock cake layer C was adhered to the outer surface of the flat membrane module 3, and the maximum thickness of the concentrated and agglomerated flock cake layer C was about 4 mm. Next, vacuum suction was performed for 30 minutes by the vacuum pump 7 in the vacuum suction process T4. When 3 minutes have elapsed since the start of vacuum suction, cracks began to occur in the concentrated and agglomerated floc cake layer C, and after another 10 minutes, the cracks spread throughout the concentrated and agglomerated floc cake layer C. It was observed that the film peeled off from the flat membrane module 3 and dropped. Thereafter, an air flow having an air volume of 10 [L / min] per membrane was supplied from the air nozzle 9 to the outer surface of the flat membrane module 3 in the peeling process T5. By this peeling process T5, about 95% of the concentrated and agglomerated floc cake layer C attached to the flat membrane module 3 could be peeled off. The peeled and concentrated floc fragments were collected and analyzed. As a result, the water content was about 75%, and the maximum thickness was 3.7 mm.

  The solid component concentration separation method and apparatus of the present invention can be used to concentrate and separate solid components in purified water sludge, coagulated floc and raw water in the field of water treatment.

It is a schematic sectional drawing which shows the structure of the purified water sludge concentration separation apparatus which concerns on Example 1. FIG. It is a schematic sectional drawing of an example of a flat membrane module. It is a time chart which shows operation | movement of the purified water sludge concentration separation apparatus of FIG. It is a schematic sectional drawing which shows the introduction process of the purified water sludge concentration separation apparatus of FIG. It is a schematic sectional drawing which shows the time of the start of the adhesion process of the purified water sludge concentration separation apparatus of FIG. It is a schematic sectional drawing which shows the middle of the adhesion process of the purified water sludge concentration separation apparatus of FIG. It is a schematic sectional drawing which shows the time of completion | finish of the adhesion process of the purified water sludge concentration separation apparatus of FIG. It is a schematic sectional drawing which shows the movement process of the purified water sludge concentration separation apparatus of FIG. It is a schematic sectional drawing which shows the vacuum suction process of the purified water sludge concentration separation apparatus of FIG. It is a schematic sectional drawing which shows the peeling process of the purified water sludge concentration separation apparatus of FIG. FIG. 3 is a schematic cross-sectional view showing a configuration of an agglomerated floc concentration separator according to Example 2. It is a time chart which shows operation | movement of the aggregation floc concentration separation apparatus of FIG. It is a schematic sectional drawing which shows the introduction process of the aggregation floc separation apparatus of FIG. It is a schematic sectional drawing which shows the time of the start of the adhesion process of the aggregation floc concentration separation apparatus of FIG. It is a schematic sectional drawing which shows the middle of the adhesion process of the aggregation floc concentration separation apparatus of FIG. It is a schematic sectional drawing which shows the time of completion | finish of the adhesion process of the aggregation floc concentration separation apparatus of FIG. It is a schematic sectional drawing which shows the movement process of the aggregation floc concentration separation apparatus of FIG. It is a schematic sectional drawing which shows the vacuum suction process of the aggregation floc concentration separation apparatus of FIG. It is a schematic sectional drawing which shows the peeling process of the aggregation floc concentration separation apparatus of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Purified water sludge storage tank 2 Purified water sludge processing tank 3 Flat membrane module 4 Suction pump 7 Vacuum pump 8 Blower 9 Air nozzle 10 Belt conveyor 11 Discharge tank 15 Purified sludge water return pump 19 Pressurizing valve 23 Control device 100 Purified water sludge concentration separation device 200 Coagulation floc concentration separator

Claims (4)

  An attachment process in which a membrane module is immersed in water containing a solid component and moisture in the water is sucked into the membrane module to attach the solid component to the outside of the membrane module, and the membrane module to which the solid component is attached is in the atmosphere A dehydration process in which moisture of the solid component is sucked into the membrane module while being exposed to water and dehydrated, and a peeling process in which the solid component adhering to the outside of the membrane module in the atmosphere is stripped. Solid component concentration and separation method.   The solid component concentration / separation method according to claim 1, wherein the solid component is purified water sludge, aggregated floc, or a solid component in raw water.   A membrane module immersed in water containing a solid component, an attachment means for sucking moisture into the inside of the membrane module immersed in water containing a solid component and attaching the solid component to the outside of the membrane module, and the solid component Dehydration means for sucking and dehydrating the moisture of the solid component to the inside of the membrane module while the attached membrane module is exposed to the atmosphere, and peeling for peeling the solid component attached to the outside of the membrane module in the atmosphere And a solid component concentrating / separating device.   4. The solid component concentration / separation device according to claim 3, wherein the solid component is purified water sludge, coagulated floc, or a solid component in raw water.

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