JP2015020158A - Phosphorus recovery apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a phosphorus recovery apparatus capable of efficiently recovering phosphorus within an effluent even if the facility scale is small.SOLUTION: The provided phosphorus recovery apparatus 1 includes a drum 2, a treatment target water supply passage 3, a recovery agent supply section 4, a collector 5, a treated water recovery passage 6, a supporter 7, and a driver 8. The drum 2 is a cylindrical container 20 into which treatment target water W streams via an inlet 211 on one terminal section 21 along a rotation shaft A positioned along a direction traversing the vertical direction and out of which the treated water is discharged via an outlet 221 on the other terminal section 22 and possesses, on the inner circumferential wall thereof, a spiral partition board 23 whose center coincides with the rotation shaft A. The treatment target water supply passage 3 supplies a phosphorus-containing effluent as the treatment target water W into the drum 2 via the inlet 211. The recovery agent supply section 4 supplies, into the drum 2 via the inlet 211, a recovery agent P for generating a phosphorus-containing recovered matter Q. The collector 5 is positioned on the outlet side of the drum 2 interior so as to retrieve the recovery agent P and recovered matter Q to the outside via the outlet 221. The treated water recovery passage 6 recovers the treated water W discharged from the outlet 221 of the drum 2.

Description

  Embodiments of the present invention relate to a phosphorus recovery apparatus that recovers phosphorus contained in treated water.

  Waste water discharged from the dehydration process and digestion process after anaerobic and aerobic treatment of sewage, human waste, waste water, and the like contains phosphorus and ammonia. As a method for removing phosphorus from the waste water, a MAP (magnesium ammonium phosphate) method is known. The MAP method removes phosphorus by adding magnesium to waste water to adjust the pH to produce MAP.

  In order to carry out the MAP method, there is a dephosphorization apparatus in which waste water is introduced as treated water into a reaction vessel in which magnesium ammonium phosphate (MAP) particles flow, and MAP is further precipitated on the surface of the particles. In this dephosphorization apparatus, aeration is performed in order to diffuse the MAP particles evenly in the treated water. In order to take out the grown MAP particles, aeration of the reaction vessel is temporarily stopped.

Japanese Patent No. 4028189

  By the way, in the MAP method, a certain reaction time is required, and a large reaction tank is required to generate MAP. And while taking out produced | generated MAP, since the process cannot be performed in the reaction tank, in order to process waste_water | drain continuously, several reaction tanks are required. In addition to the reaction tank, an aging tank or a precipitation tank having a size larger than these may be required. As described above, since a large number of tanks are required as a reaction tank, an aging tank, and a precipitation tank, when trying to handle water treatment in a region with a large amount of treated water with the above-described apparatus, the scale of the water treatment apparatus is large. It will grow and will require a vast site to install water treatment facilities.

  In the reaction tank, air is aerated to stir the inside. Therefore, not only a fine product may be generated in the reaction vessel, but also the crystals produced in the reaction vessel may be crushed. If this fine product or crushed crystals flow out of the reaction tank, the crystals may accumulate or grow in piping and processes downstream from the reaction tank. In such a case, the frequency of maintenance of the water treatment facility increases and the operation rate decreases.

  Therefore, the present invention provides a phosphorus recovery apparatus that can efficiently recover phosphorus in treated water even in a small-scale facility.

  The phosphorus collection | recovery apparatus of one Embodiment which concerns on this invention is equipped with a drum, a treated water supply path, a collection | recovery agent supply part, a collection apparatus, a treated water collection path, a support apparatus, and a drive device. The drum is a cylindrical container in which treated water flows from the inlet of one end and is discharged from the outlet of the other end along a rotation axis arranged in a direction crossing the vertical direction, and rotates on its inner peripheral wall. It has a spiral partition plate centering on the axis. The treated water supply channel supplies wastewater containing phosphorus as treated water from the inlet to the drum. The recovery agent supply unit supplies a recovery agent that generates a recovery product containing phosphorus from the inlet to the drum. The collecting device is installed on the outlet side in the drum, and takes out the recovery agent and the recovered material from the outlet to the outside. The treated water collection path collects treated water discharged from the drum outlet. The support device supports the drum so that it can roll about the rotation shaft. The drive device rotates the drum.

The perspective view which shows the phosphorus collection | recovery apparatus of 1st Embodiment. Sectional drawing which follows the rotating shaft of the phosphorus collection | recovery apparatus of FIG. Sectional drawing of the phosphorus collection | recovery apparatus which follows the F3-F3 line | wire in FIG. The perspective view of the exit periphery containing the collection board of FIG. Sectional drawing which follows the rotating shaft of the phosphorus collection | recovery apparatus of 2nd Embodiment. Sectional drawing of the phosphorus collection | recovery apparatus which follows the F6-F6 line | wire in FIG. Sectional drawing of the phosphorus collection | recovery apparatus which the drum rotated a little from the state of FIG. Sectional drawing which follows the rotating shaft of the phosphorus collection | recovery apparatus of 3rd Embodiment. Sectional drawing which follows the rotating shaft of the phosphorus collection | recovery apparatus of 4th Embodiment. The perspective view of the drive device of the phosphorus collection | recovery apparatus of 5th Embodiment.

  The phosphorus collection | recovery apparatus 1 of 1st Embodiment is demonstrated with reference to FIGS. 1-4. The phosphorus collection | recovery apparatus 1 shown in FIG. 1 introduces the waste_water | drain containing the phosphorus after the anaerobic process and the aerobic process were performed as the treated water W, and processes phosphorus which becomes a phosphorus collection | recovery material and an active ingredient React in water W and collect. The recovered phosphorus is used as a fertilizer after sufficiently removing moisture and, in some cases, further dried.

  As shown in FIG. 1, the phosphorus recovery device 1 includes a drum 2, a treated water supply path 3, a recovery agent supply unit 4, a collection device 5, a treated water recovery path 6, a support device 7, and a drive device 8. The drum 2 is a cylindrical container 20 that is arranged in a direction in which the rotation axis A crosses the vertical direction, in the present embodiment, substantially horizontal, and has an inlet 211 at one end 21 in the direction along the rotation axis A. An outlet 221 is provided at the other end 22 on the opposite side. The treated water W flows from the inlet 211 along the rotation axis A of the drum 2 and is discharged from the outlet 221.

  In this embodiment, for convenience of explanation, “upper” and “lower” are defined on the basis of gravity, “upstream” is defined as the side to which the treated water W is supplied, and “downstream” is defined as the side from which the treated water W is discharged. Further, the rotation directions when the drum 2 is viewed from the upstream side to the downstream side are defined as “clockwise (clockwise)” and “counterclockwise (counterclockwise)”, respectively. In the present specification, when the arrangement and direction are described, the defined terms and the like may be used for explanation.

  The drum 2 has a spiral partition plate 23 centering on the rotation axis A on the inner peripheral wall of the cylindrical container 20. The partition plate 23 is spiral in a direction in which the treated water W is pushed away from the inlet 211 side to the outlet 221 side when the drum 2 is rotated. Therefore, when the drum 2 is rotated clockwise, the partition plate 23 is formed in a spiral so as to be a so-called “left-handed screw”, and when the drum 2 is rotated counterclockwise, the partition plate 23 is so-called “ It is formed in a “right-handed” spiral shape. In the present embodiment, the partition plate 23 is formed as a “right-hand thread” as shown in FIG. 1, so that the drum 2 is rotated counterclockwise. The partition plate 23 is formed like a “non-axial screw” in which the central portion of the cylindrical container 20 is opened along the rotation axis A.

  The treated water supply path 3 supplies wastewater containing phosphorus as treated water W from the inlet 211 into the drum 2. The nozzle 31 of the treated water supply path 3 should just be arrange | positioned so that it may not interfere with the partition plate 23 of the rotating drum 2 and others. In this embodiment, as shown in FIGS. 1 and 2, the nozzle 31 is directed downward.

  As shown in FIGS. 1 and 2, the recovery agent supply unit 4 supplies the recovery agent P into the drum 2 from an inlet 211 on the same side as the treated water supply path 3. The recovery agent P is a sandy solid. The supplied recovery agent P is mixed with the treated water W and is conveyed along with the treated water W to the outlet 221 on the downstream side as the drum 2 rotates. When this recovered agent P is introduced into the treated water W, it reacts in contact with the treated water W, and a recovered product Q is generated on the surface of the particles of the recovered agent P. 1 and 2, the nozzle 41 of the recovery agent supply unit 4 supplies the recovery agent P to substantially the same position as the treated water W flowing out from the treated water supply path 3. The nozzle 41 of the recovery agent supply unit 4 supplies the recovery agent P downstream of the end of the partition plate 23 close to the inlet 211 so that the recovery agent P is reliably conveyed downstream by the partition plate 23. May be.

  The collecting device 5 is installed on the outlet 221 side in the drum 2, and is provided to take out the recovery agent P and the recovered material Q formed on the surface thereof from the outlet 221 to the outside of the drum 2. In the case of this embodiment, the collection device 5 includes at least one collection plate 51, a basket 52, and a solid-liquid separator 53 as shown in FIGS. 1 to 4.

  The sampling plate 51 is attached to the inner peripheral wall of the cylindrical container 20 on the outlet side so as to cross the rotational circumferential direction of the drum 2 and extends toward the rotational axis A. In the case of this embodiment, as shown in FIG. 3, the sampling plates 51 are attached at equal pitches in the circumferential direction, and the tip is gently curved in the rotation direction of the drum 2. As shown in FIGS. 3 and 4, when the drum 2 rotates, the collection plate 51 scoops up the collected agent P and the collected material Q collected at the bottom of the drum 2 together with the treated water W.

  As shown in FIG. 3, when the drum 2 rotates and the sampling plate 51 moves above the rotation axis A, the basket 52 has an upstream end 521 disposed below the sampling plate 51. As shown in FIG. 2, the downstream end 522 of the flange 52 extends outward from the outlet 221. In order to improve the fluidity of the recovery agent P and the recovery product Q poured in by the collection plate 51, the downstream end 522 of the tub 52 is lower than the upstream end 521. The jar 52 should just be open | released so that the upstream end 521 can throw in the collection | recovery agent P and the collection | recovery Q. Accordingly, the flange 52 extending outside the outlet 221 of the drum 2 may be a cylinder whose upper surface is covered.

  The solid-liquid separator 53 separates the solid component from the mixed state of the treated water W, the recovery agent P, and the recovery product Q, which are scooped up from the bottom of the drum 2 by the sampling plate 51. The recovery agent P and the recovery agent P in which the recovery product Q is generated on the surface thereof are at least larger than the particle size of the recovery agent P. Therefore, the solid-liquid separator 53 includes a screen that collects the recovery agent P, for example. The solid-liquid separator 53 is not limited to the method using a screen, as long as the recovery agent P and the recovery product Q can be separated from the treated water W. For example, the moisture may be evaporated by heating. Further, the collecting device 5 may suck up the collected agent P and the collected material Q with a hose instead of scooping up with the collection plate 51.

  The treated water collection path 6 collects the treated water W discharged from the outlet 221 of the drum 2. The treated water collection path 6 has a collection chute 61 having a large frontage in order to receive the treated water W discharged by overflowing from the drum outlet 221. The treated water W that has been collected in the treated water collection path 6 is collected together with the treated water W that has been separated by the solid-liquid separator 53.

  The support device 7 is installed under the drum 2 and supports the drum 2 so that it can roll about the rotation axis A. In the case of this embodiment, the support device 7 is a so-called “turning roller” having a roller 71 that is in rolling contact with the outer periphery of the cylindrical container 20, and supports the drum 2 at two locations. When the drum 2 is sufficiently long along the rotation axis A, the support devices 7 may be installed at three or more locations. In order to prevent the drum 2 from continuing to rotate and to move in the direction along the rotation axis A, it is preferable to provide a flow stopper that makes rolling contact with the one end 21 or the other end 22 from the direction along the rotation axis A. . A guide for guiding the roller 71 of the support device 7 may be provided on the outer surface of the drum 2 instead of the flow stopper.

  The drive device 8 rotates the drum 2 placed on the support device 7 at a constant speed. In the case of this embodiment, one of the support devices 7 is a drive roller in which the drive device 8 is incorporated, and the roller 71 is driven by a motor to roll the drum 2. Instead of adopting the support device 7 in which the drive device 8 is incorporated, a belt is put on the outer periphery of the cylindrical container 20 to drive the belt, or a sprocket is provided on one end 21 or the other end 22 to drive with a chain. Or may be driven by providing a gear.

  Further, in this phosphorus recovery apparatus 1, as shown in FIGS. 2 and 3, the inner peripheral edge 212 at the lower end of the inlet 211 of the drum 2 is set to be always higher than the inner peripheral edge 222 at the lower end of the outlet 221. . Further, the inner peripheral edge 232 at the lower end of the partition plate 23 is provided so as to be always higher than the inner peripheral edge 222 at the lower end of the outlet 221. In the present embodiment, the water level L of the treated water W supplied to the drum 2 of the phosphorus recovery apparatus 1 is lower than the inner peripheral edge 212 of the inlet 211 of the drum 2 and the inner peripheral edge 232 of the partition plate 23, and is within the outlet 221. It is higher than the peripheral edge 222.

  According to the phosphorus recovery apparatus 1 of the first embodiment configured as described above, the drum 2 is rolled counterclockwise by the support device 7 and the drive device 8 when viewed from the inlet 211 side of the drum 2. . In this state, as shown in FIG. 2, the treated water W is supplied from the treated water supply path 3, and the recovered agent P is supplied from the recovered agent supply unit 4. Since the spiral partition plate 23 is provided in the drum 2, the treated water W and the recovery agent P supplied to the drum 2 gradually move toward the outlet 221 as the drum 2 rolls. To the downstream side. When the drum 2 rotates once, as shown in FIG. 2, the drum 2 moves to the position of the section adjacent to the section partitioned by the partition plate 23.

  Since the inner peripheral edge 232 at the lower end of the partition plate 23 is higher than the water level L of the treated water W, the treated water W and the recovery agent P supplied to the drum 2 are formed in a spiral shape and are adjacent to each other around the circumference. Is divided into multiple sections. And since the quantity of the treated water W and the collection | recovery agent P which are supplied during one rotation of the drum 2 is constant, the quantity of the treated water W and the collection | recovery agent P of an adjacent division becomes the same quantity. That is, the processing time of adjacent sections has a time difference by one rotation of the drum 2. In other words, the treated water W and the recovery agent P in a plurality of sections are continuously processed with a time difference.

  In the case of the present embodiment, as shown in FIGS. 1 and 2, the partition plates 23 are provided for six pitches, so that the inside of the cylindrical container 20 is partitioned into a maximum of seven sections. The treated water W of one section divided is kept in contact with the recovery agent P in the same section while being transported to the outlet 221. The phosphorus removal reaction proceeds with changes in the pH value and ion concentration of the treated water. In the phosphorus recovery apparatus 1 of the present embodiment, the process proceeds for each section divided by the partition plate 23, so that the phosphorus recovery process is stably performed.

  Further, the treated water W and the recovery agent P are conveyed to the outlet 221 by the partition plate 23 as the drum 2 rotates. By adjusting the rotational speed of the drum 2 and the helical pitch of the partition plate 23 to optimize the treatment time in which the treated water W and the collection agent P are in contact, that is, the reaction time, the phosphorus recovery rate is improved. Can do. Furthermore, the recovery agent P is agitated in the treated water W as the drum 2 rotates. The rotation speed of the drum 2 is sufficiently slow so that the water surface of the treated water W is not disturbed. Therefore, since the recovery agent P does not collide violently, it is possible to prevent the recovered product Q generated on the surface of the recovery agent P from being peeled off or crushed.

  According to this phosphorus collection | recovery apparatus 1, while supplying the treated water W and the collection | recovery agent P from the upstream of the rotating drum 2, the collection | recovery agent P in which the collection | recovery Q was produced | generated from the downstream is collected. Phosphorus can be continuously recovered from W. Since the phosphorus collection | recovery apparatus 1 has the some division divided by the partition plate 23 in the one drum 2, it does not require a some tank for every process of collection | recovery processing. Since the phosphorus collection | recovery apparatus 1 can be made small, this phosphorus collection | recovery apparatus 1 is easy to introduce | transduce also into the small-scale water treatment facility which handles a small amount of waste_water | drain as the treated water W.

  Below, the phosphorus collection | recovery apparatus 1 of 2nd-5th embodiment is each demonstrated using a figure. In each embodiment, matters different from the first embodiment will be described. At this time, in each embodiment, the structure which has the same function as 1st Embodiment attaches | subjects the same code | symbol in a figure, and the detailed description considers the corresponding description of 1st Embodiment. In addition, since matters other than those described in each embodiment are basically the same as those in the first embodiment, those not shown in each embodiment will be described with reference to the drawings of the first embodiment and the description thereof. I will consider it.

  The phosphorus collection | recovery apparatus 1 of 2nd Embodiment is demonstrated with reference to FIGS. As shown in FIGS. 5 and 6, the drum 2 of the phosphorus recovery apparatus 1 includes a lifter 24 between the partition plates 23 adjacent in the direction along the rotation axis A. As shown in FIG. 6, the lifter 24 extends from the inner peripheral wall in a direction opposite to the rotation direction of the cylindrical container 20 and in a direction in which the radius of the cylindrical container 20 decreases. As shown in FIG. 5, the lifter 24 is installed between the spiral partition plates 23 adjacent in the direction along the rotation axis A. Other configurations are the same as those of the phosphorus recovery apparatus 1 of the first embodiment.

  In the phosphorus recovery apparatus 1 configured as described above, when the drum 2 rotates, the lifter 24 scoops up the recovery agent P as shown in FIG. 6, and the cylinder in the treated water W as shown in FIG. Drop into container 20. In the process in which the recovered product Q is generated on the surface of the recovery agent P, it is possible to prevent the recovery agent P from adhering to the surrounding recovery agent P and becoming a lump.

  Accordingly, the lifters 24 may be arranged at positions symmetrical with respect to the rotation axis A as shown in FIG. 6, or a plurality of the lifters 24 may be arranged so that two or more of them are equally spaced. Further, the lifter 24 may be provided only at one place during one rotation of the drum 2. In addition, as shown in FIGS. 5 and 6, the lifters 24 may be arranged side by side at the same phase position in the direction along the rotation axis A, or may be arranged at different phase positions. Further, the lifter 24 may be arranged in a biased position at a position where the recovered material Q is generated in the recovered agent P and the particles of the recovered agent P are likely to be agglomerated.

  Each lifter 24 is connected to the partition plate 23 located on the upstream side between the adjacent partition plates 23, and has a gap with the partition plate 23 located on the downstream side. Since the lifter 24 is connected to the upstream partition plate 23, more of the recovered agent P conveyed downstream by the partition plate 23 is scooped up by the lifter 24. In addition, since the lifter 24 has a gap between the downstream partition plate 23 and the lifter 24 is immersed in the treated water W as the drum 2 rotates, the lifter 24 and the cylindrical container 20 are not separated from each other. The treated water W immediately flows in between, and when the lifter 24 is pulled up from the treated water W, the treated water W between the lifter 24 and the cylindrical container 20 is immediately discharged. That is, when the lifter 24 sinks or is pulled up, the treated water W can be prevented from being stirred more than necessary, and the recovered material Q generated on the surface of the recovery agent P can be prevented from being crushed. .

  The phosphorus collection | recovery apparatus 1 of 3rd Embodiment is demonstrated with reference to FIG. As shown in FIG. 8, the phosphorus recovery apparatus 1 has an inner peripheral edge 232 at the lower end of the partition plate 23 that is lower than an inner peripheral edge 222 at the lower end of the outlet 221. The water level L is higher than the inner peripheral edge 232 of the partition plate 23. That is, the phosphorus recovery apparatus 1 of this embodiment is configured to perform so-called “overflow” in which the treated water W circulates between the sections partitioned by the partition plate 23. The treated water W supplied from the treated water supply passage 3 flows over the spiral partition plate 23, and a part of the treated water W is discharged from the outlet 221 prior to the recovery agent P supplied to the drum 2 at the same time. Is done. By returning the treated water W discharged from the outlet 221 to the inlet 211 again and circulating it, the amount of the recovered material Q that can be recovered with the same amount of the recovery agent P can be increased, that is, the recovery rate can be improved.

  The phosphorus collection | recovery apparatus 1 of 4th Embodiment is demonstrated with reference to FIG. As shown in FIG. 9, in this phosphorus recovery apparatus 1, the drum 2 is installed with the rotation axis A of the cylindrical container 20 inclined. By tilting the rotation axis A, the inner peripheral edge 212 at the lower end of the inlet 211 is made higher than the inner peripheral edge 222 at the lower end of the outlet 221 as in the phosphorus recovery apparatus 1 of the first embodiment. Even if the inner peripheral edge 212 at the lower end of the inlet 211 of the cylindrical container 20 and the inner peripheral edge 222 at the lower end of the outlet 221 are provided at the same radius with respect to the rotation axis A, the inlet 211 side is higher than the outlet 221 side. The treated water W can be discharged from the outlet 221 simply by tilting the rotation axis A. Further, the inner peripheral edge 232 of the partition plate 23 can also have the same dimensions as the inner diameters of the inlet 211 and the outlet 221.

  The phosphorus collection | recovery apparatus 1 of 5th Embodiment is demonstrated with reference to FIG. As shown in FIG. 10, the phosphorus collection device 1 includes a water wheel 81 as the drive device 8. The water turbine 81 has a plurality of blades 82 that are radially installed around the rotation axis A inside the inlet 211 of the drum 2. And as shown in FIG. 10, the nozzle 31 of the treated water supply path 3 is installed at an angle in the horizontal direction from directly below.

  The water turbine 81 generates a desired rotational force by receiving the treated water W (drainage) flowing out from the treated water supply path 3 with the blades 82. Thus, by supplying the power for rolling the drum 2 with the water turbine 81, not only can the operating cost of the phosphorus recovery apparatus 1 be suppressed, but also the structure is simplified. In addition, the structure of the water turbine 81 is not restricted to the thing which has the blade | wing 82 shown in FIG. As long as it is possible to generate a sufficient driving force with the supply amount of the treated water W, power is generated in a Pelton turbine, Francis turbine, crossflow turbine, etc. using the treated water W supplied from the treated water supply path 3. The power may be transmitted directly to the drum 2 or may be transmitted to the drum via a transmission mechanism.

  As mentioned above, the lifter 24 demonstrated in 2nd Embodiment among the structures demonstrated by each embodiment about the phosphorus collection | recovery apparatus 1 is applicable also to the phosphorus collection | recovery apparatus 1 of 3rd and 4th embodiment. Moreover, the water turbine 81 shown as an example of the drive device 8 in 5th Embodiment is applicable also to the phosphorus collection | recovery apparatus 1 of 1st to 4th embodiment. At this time, the water turbine 81 may be used in the first to fifth embodiments together with the driving device 8 incorporated in the support device 7 described in detail in the first embodiment. That is, when a large torque is required to start the rotation of the drum 2, both the water turbine 81 and the drive device 8 are used, and while the rotation speed is stable, the output of the drive device 8 is pressed to save energy consumption. can do.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... Phosphorus collection | recovery apparatus, 2 ... Drum, 20 ... Cylindrical container, 21 ... One end, 211 ... Inlet, 212 ... Inner peripheral edge (at the lower end of an inlet), 22 ... Other end, 221 ... Outlet, 222 ( Inner peripheral edge (at lower end of outlet), 23 ... partition plate, 232 ... Inner peripheral edge (at lower end of partition plate), 24 ... lifter, 3 ... treated water supply path, 31 ... (treated water supply path) nozzle, 4 ... recovery Agent supply unit, 41... (Collected agent supply unit) nozzle, 5. Collecting device, 51... Sampling plate, 52..., 521 .. (upstream) upstream end, 522. Liquid separator, 6 ... treated water recovery path, 7 ... support device, 8 ... drive device, 81 ... water wheel, W ... treated water, L ... water level (treated water in the drum), A ... rotating shaft (of the drum) , P ... recovered agent, Q ... recovered material.

Claims (10)

A spiral centered on the rotation axis on the inner peripheral wall of a cylindrical container from which treated water flows in from the inlet of one end and is discharged from the outlet of the other end along a rotation axis arranged in a direction crossing the vertical direction A drum having a partition plate,
A treated water supply path for supplying wastewater containing phosphorus as the treated water from the inlet to the drum;
A recovery agent supply section for supplying a recovery agent for generating a recovery product containing phosphorus to the drum from the inlet;
A collecting device installed on the outlet side in the drum and taking out the recovery agent and the recovered material from the outlet;
A treated water recovery path for recovering treated water discharged from the outlet of the drum;
A support device for supporting the drum so as to roll about the rotation shaft;
A driving device for rotating the drum;
A phosphorus recovery apparatus comprising:   The drum includes a lifter extending from the inner peripheral wall in a direction opposite to the rotation direction of the cylindrical container and in a direction in which the radius of the cylindrical container becomes smaller between the partition plates adjacent to each other in the direction along the rotation axis. 1. The phosphorus recovery apparatus described in 1.   The phosphorus collection | recovery apparatus described in Claim 1 or Claim 2 arrange | positioned in the position where the inner periphery of the lower end of the said inlet is higher than the inner periphery of the lower end of the said exit.   The phosphorus collection | recovery apparatus described in Claim 3 with which the inner periphery of the lower end of the said partition plate is arrange | positioned in the position higher than the inner periphery of the lower end of the said exit.   The phosphorus collection | recovery apparatus described in Claim 3 with which the inner periphery of the lower end of the said partition plate is arrange | positioned in the position lower than the inner periphery of the lower end of the said exit.   The phosphorus recovery apparatus according to claim 1, wherein the drum is installed with the rotation shaft inclined so that the inlet side is higher than the outlet side.   The phosphorus recovery apparatus according to claim 4 or 6, wherein a level of the treated water in the drum is lower than an inner peripheral edge of a lower end of the partition plate.   The phosphorus recovery apparatus according to any one of claims 4 to 6, wherein a level of the treated water in the drum is higher than an inner peripheral edge of a lower end of the partition plate. The collector is
At least one sampling plate attached to the inner peripheral wall on the outlet side of the drum in a direction transverse to the rotational circumferential direction;
When the drum rotates and the sampling plate moves above the rotation shaft, an upstream end is disposed below the sampling plate and the downstream end extends outward from the outlet;
A solid-liquid separator that is installed at the downstream end of the dredger and separates the collected component collected from the collection plate and the solid component of the collected product from treated water;
The phosphorus collection | recovery apparatus described in any one of Claims 1-8 provided with these.   The said drive device is a water turbine which is provided in the said drum by the side of the said entrance, and receives the treated water which flows out out of the said treated water supply path, and generate | occur | produces a rotational force. The phosphorus recovery apparatus described in the item.

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