JP2002136977A - Sewage treatment apparatus of waste household electric appliance recycling treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact and inexpensive sewage treatment apparatus reduced in generation quantity of waste and low in running cost, adapted to a recycling treatment apparatus for sorting plastics or the like by material from crushed matter of waste household electric appliances becoming waste by specific gravity sorting using water and enabling a closed system wherein pollutants of sorting water are separated during the operation of a specific gravity sorter when a large quantity of crushed matter of waste household electric appliances is sorted on the basis of specific gravity at least after iron is recovered and treated sorting water is returned to the specific gravity sorter. SOLUTION: Sewage contributing to the specific gravity sorting action using water of the crushed matter of waste household electric appliances is put in a flocculant reaction tank 50 having a stirrer 48 and floc (flocculated matter) is grown in a floc ageing tank 51 and a floc separation tank is connected to the floc ageing tank 51 to separate floc and treated water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage treatment apparatus of a recycling apparatus for separating plastics and the like from materials obtained by crushing waste home electric appliances as waste by specific gravity of water.

[0002]

2. Description of the Related Art FIG. 15 shows a plastic sorting apparatus and a sewage treatment apparatus conventionally used by a recycling company. Hereinafter, the configuration and operation of this device will be described.

As shown in FIG. 15, a plastic separation tank is divided into a first tank 1 and a second tank 2 which are divided into two blocks.
The third tank having the first tank 1, the second tank 2, and the water intake 3
A water specific gravity sorting tank 5 with the tank 4, a circulation path composed of an intake port 3, a circulation pump 6 and a discharge port 7, and a transport system composed of a raw material supply conveyor 8 and a recovery conveyor 9. A sewage treatment path composed of a sand filter 11 and an ion exchange tower 12 is provided through a drain valve 10 provided at the bottom of the specific gravity separation tank 5 to constitute a floating / sedimentation type water specific gravity separation device.

[0004] Next, the operation of the above configuration will be described. First, a metal lump such as a motor and a compressor is taken out from a waste home appliance in advance, then the waste home appliance body is crushed, iron is collected by a magnetic separator, and an aluminum lump is removed. A non-ferrous material such as a copper lump is collected by a non-ferrous separator, and the remaining crushed material mainly composed of plastic is supplied to a water specific gravity sorting tank 5 through a raw material supply conveyor 8.

At this time, the sorted water in the water specific gravity sorting tank 5 is circulated through the circulation pump 6 so that the sorted water in the water specific gravity sorting tank 5 is returned from the water inlet 3 to the discharge port 7 and circulated. Sorting water in the sorting tank 5 flows from the discharge port 7 side to the intake port 3 side.

Accordingly, the crushed material containing plastic as a main component supplied to the water specific gravity separation tank 5 has a specific gravity of about 1.4, and a vinyl chloride resin or the like having a large specific gravity sinks quickly. The styrene resin which settles down and has a specific gravity of about 1.05, which is relatively close to the specific gravity of water, gradually sinks, settles at the bottom of the second tank 2, and has a specific gravity of about 0.91 which is smaller than the specific gravity of water. Recovery conveyor 9 with resin floating
And is collected.

[0007] In this plastic sorting operation, the sorting water contains metal powder containing heavy metals that could not be separated before the raw material was supplied to the water-specific gravity sorting tank 5, metal powder containing heavy metals attached to the plastic surface, and dust and mold. Dirt is brought in, and the sorted water is contaminated with heavy metals, metals such as iron, non-ferrous metals, mud, mold and the like. Separated water that has become sewage in the water specific gravity separation tank 5 is filtered through a drain valve 10 for undissolved contaminants in a sand filter 11, and then in an ion exchange tower 12 for ionized heavy metals or the like. The treated water after capturing the metal ions is drained, and the water is replaced in the water specific gravity separation tank 5.

[0008]

When a large amount of crushed waste home appliances are sorted in a water specific gravity separation tank, the sifted water is immediately contaminated with metal powder adhering to the crushed material and dirt. At this time,
If the plastic is re-contaminated with this dirty sorting water, when the sorted plastic (PP resin) is processed into pellets, the catalytic action of the metal may cause thermal degradation of the plastic or clog the screen of the extruder. This causes a problem in mass productivity.

However, the compact sewage treatment apparatus shown in FIG. 15 has a problem that the sewage treatment capacity is low in the filtration step and the ion exchange step, and cannot be applied to a closed system in which sewage and treated water are circulated to a water specific gravity separation tank. . In other words, a closed system requires a large installation space and a large-sized device, which increases the cost of recycling and is not practical.

[0010] Further, it is necessary to periodically replace the sand of the filter medium, and there is a problem that, despite recycling, it is necessary to treat the waste including sand after stabilizing the heavy metal. . Further, there is a problem in that the ion exchange resin in the ion exchange tower 12 must be periodically regenerated, which leads to complications and regeneration costs.

[0011] The present invention solves the above-mentioned problems, and in the case where a large amount of crushed waste home appliances after iron recovery is to be sorted by specific gravity, contamination of sorted water (metal, non-ferrous) during operation of the specific gravity separator. A closed system that separates the separated water that has been treated into a specific gravity sorter by separating metal, mud, mold, dust, etc.) is possible, and it is a compact and inexpensive device that also has a small amount of waste and a low running cost. It is intended to provide.

[0012]

According to the present invention, in order to achieve the above object, sewage which has contributed to the action of water gravitational sorting of crushed waste home appliances into a flocculant reaction tank having a stirrer is provided.
The floc (aggregate) generated in the flocculant reaction tank is grown in a floc ripening tank, and a floc separation tank is connected to the floc ripening tank so that the floc and treated water are separated.

[0013] Thus, when a large amount of crushed waste home appliances after iron recovery is to be sorted in a large specific gravity, contamination of the sorted water (metal, non-ferrous metal, mud, mold, dust, etc.) during operation of the specific gravity separator is performed. ), And a closed system capable of returning the treated sorted water to the specific gravity sorter can be provided, and a compact and inexpensive apparatus, and a wastewater treatment apparatus with less waste and low running cost can be provided.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An invention according to claim 1 of the present invention is directed to a coagulant reaction tank having a stirrer into which sewage that has contributed to the operation of separating crushed waste home appliances into water with specific gravity is provided. It is equipped with a floc ripening tank for growing flocs (agglomerates) generated in the reaction tank, and a floc separation tank that communicates with the floc ripening tank and separates the flocs and treated water. Heavy metal powder, metal powder, non-ferrous powder, mud, mold, and dust contained therein can be removed while suspended (undissolved substance) in water used for water specific gravity selection. As a result, it is possible to prevent re-contamination of the plastic to be sorted out, and in particular, it is possible to prevent thermal degradation due to the catalytic action of metal at the time of pellet processing at the time of material recycling of the olefin resin (PP resin). In addition, when the plastic is processed into pellets with the dirt component, the foreign matter removing screen of the extruder can be prevented from being immediately clogged.
In addition, by circulating the sewage-treated sorted water to the water-specific-gravity sorting device, water resources can be effectively used. Furthermore, when the salt concentration of the sorting water increases and the specific gravity of the sorting water becomes high and cannot be used, the wastewater can be drained to the sewerage system without entrusting the treatment of expensive wastewater.

According to a second aspect of the present invention, in the first aspect, the treated water overflows from the flocculation reaction tank to the floc ripening tank, and further flows from the floc ripening tank to the floc separating tank. Since the sewage treatment from coagulation to separation is performed without applying mechanical force such as a pump, it is possible to prevent the formed flocs (agglomerates) from being destroyed. And good treated water can be obtained. Further, since there is no mechanical drive part, a failure hardly occurs, and the equipment cost can be reduced.

According to a third aspect of the present invention, in the first or second aspect of the present invention, there is provided means for overflowing sewage substantially at the bottom of the flock maturation tank. Largely grown matter (settled floc) is selectively overflowed to the floc separation tank, so that the precision of floc separation can be improved and good treated water can be obtained.

The invention described in claim 4 is the above-mentioned claim 1-
In the invention described in Item 3, the flock separation tank is configured to separate the flock downward and take out the treated water from above. The principle of separating the floc by its own weight and separating it from the treated water has a simple structure. It can be realized with a floc separation tank, and there are few failures and the equipment cost can be reduced.

The invention described in claim 5 is the above-mentioned claim 1
In the invention described in 3, the pressurized water supply means for supplying pressurized water from the bottom of the flock separation tank is disposed, and the flock separation tank separates the aggregates above the first tank and separates the treated water from the first tank. It is configured to be taken out from the communicating second tank, and fine bubbles are generated from the bottom of the first tank of the floc separation tank by the pressurized water supply means, and the flocs larger than the specific gravity of water are lifted upward by the buoyancy of the bubbles. To separate. As a result, the drawback of the invention described in claim 4 is solved, and the floc composition (when an oily substance is contained) or water having a specific gravity smaller than the specific gravity of water that could not be separated due to the adhesion of air bubbles can be used. Can be completely separated in the upward direction together with the large flocs, so that there is no need to provide a step such as filtering the treated water in order to remove the flocs that could not be separated.

The invention described in claim 6 is the above-mentioned claim 1-
In the invention described in 5, the floc ripening tank is provided with stirring means, and the coagulant and the dirt component that have entered the floc ripening tank without reacting or not fully reacting in the flocculant reaction tank can be reacted. Good wastewater treatment is possible. In addition, since the flocks whose weight is heavy and settled at the bottom of the floc ripening tank can be fluidized, the flocks with their own weight can also be put into the floc separating tank, and sedimentation in the floc ripening tank can be prevented.

[0020] The invention described in claim 7 is the above-mentioned claim 1-
In the invention described in 6, the stirrer of the agglutination reaction tank has a plurality of stirring blades above and below, the stirring blades having a large bottom portion, and strongly stirring at the bottom portion, and weakly stirring at the top direction. Therefore, the sewage in the coagulant reaction tank can be sufficiently agitated without generating a vortex of stirring that causes air bubbles to adhere to the coagulation reaction tank, and without destroying the generated flocs. As a result, the reaction efficiency between the flocculant and the sewage component in the flocculation reaction tank can be improved, so that better treated water can be provided.

[0021] The invention described in claim 8 is the above-mentioned claim 1-
In the invention described in 7, the inorganic coagulation reaction tank has an inorganic substance supply means, and the inorganic substance is supplied to the sewage even in a situation where the sewage dirt component is small. And a good floc separation state can be achieved. In addition, since it is possible to prevent the coagulant from being in an excessive state, when the treated water is circulated to the water specific gravity separation device, unreacted coagulant flows into the separation water and forms flocs in the water specific gravity separation device. , Equipment and plastic can be prevented from re-contaminating. Further, since the inorganic substance and the coagulant are simultaneously supplied to the coagulant reaction tank, the space of the sewage treatment apparatus can be saved.

According to the ninth aspect of the present invention, there is provided the method as set forth in the first aspect.
In the inventions described in 4, 6 to 8, the flock collecting means communicating with the bottom of the flock separation tank is arranged,
Sludge (separated floc) can be continuously or intermittently extracted and recovered from the bottom of the floc separation tank, so that sewage treatment can be performed with the water-specific-gravity sorting device always running. In addition, since sludge and treated water can be continuously drained from the bottom of the flock separation tank and sludge can be collected, the ascending flow velocity of the flock separation tank is reduced, the accuracy of floc separation is improved, and more excellent treated water is provided. it can.
The amount of circulating water can also be balanced by returning the treated water after sludge recovery to the circulation path.

[0023] The invention according to claim 10 is the invention according to claim 9.
In the invention described in the above, the water separated by the floc collecting means is configured to return to the flocculation reaction tank, the flocs that could not be recovered are returned to the flocculation reaction tank again to react with the flocculant, Inexpensive and simple collecting means can be provided.

The eleventh aspect of the present invention is directed to the first aspect.
In the invention as set forth in any one of the first to tenth aspects, the pH of the sewage that has contributed to the action of selecting the crushed waste electrical home appliances by water specific gravity is adjusted to PH 8.5 to pH 8.5.
The treatment is performed by controlling the pH to 10 and the solubility of heavy metals such as lead (solder: lead-tin alloy) contained in the crushed waste home appliances can be extremely reduced. As a result, heavy metals in sewage are present as almost undissolved suspended substances, so they can be separated and recovered as sludge with a flocculant, and the treated water can provide a sewage treatment device that meets the wastewater treatment standards for rivers and sewers. it can.

The twelfth aspect of the present invention is the first aspect of the present invention.
In the invention described in the items 10 to 10, a heavy metal reaction tank is provided before the flocculation reaction tank, and a chelating agent for the heavy metal is supplied to the wastewater in advance, and the heavy metal dissolved in the wastewater is insolubilized and separated and recovered by the flocculant. Therefore, a sewage treatment apparatus having a higher level than that of the invention described in claim 10 can be provided.

The invention according to claim 13 is the first invention.
The invention according to any one of the first to twelfth aspects, further comprising a turbidity detecting device for detecting turbidity of sewage water that has contributed to an operation of sorting crushed waste electrical appliances with water, and quantifying the degree of contamination of the sorted water in real time. The wastewater treatment apparatus can be stopped when there is little contamination of the sorted water and can be operated when there is much contamination, so that the wastewater treatment apparatus can be operated economically. Further, when the dirt of the sorting water is severe, the processing capacity of the sewage treatment apparatus can be increased to prevent re-contamination of the plastic, and a predetermined quality can be ensured.

[0027] The invention described in claim 14 is the first invention.
In the invention described in Item 3, at least the means for supplying an inorganic substance or the means for supplying a flocculant is controlled in conjunction with a turbidity detecting device, and the degree of contamination of the sorted water is automatically detected in real time, and a drug (a mineral or a flocculant) is supplied. Control the amount,
When the amount of dirt is large, it is possible to prevent an unnecessary inorganic substance from being charged or to consume an aggregating agent due to excessive inorganic substance. Also, increase the amount of inorganic substance that becomes the nucleus for coagulating the dirt components when the amount of dirt decreases, and further reduce the amount of the coagulant for a while when the sorting water becomes clean, and eventually add the coagulant. It can be stopped and then the introduction of the inorganic substance can be stopped, so that the unnecessary introduction of the medicine can be prevented. Furthermore, since an excessive amount of coagulant is not added to the amount of dirt, the coagulant is brought into the water-specific-gravity sorter, and floc is formed with the dirt component in the device, thereby preventing contamination of plastic and the device. As a result, the medicine can be made to act effectively on dirt, and waste of running costs can be prevented. Further, since the plastic is not re-contaminated, the physical properties required for material recycling can be maintained.

[0028]

[Examples] In the following, with respect to the examples of the present invention, after completely crushing the used home electric appliances, the iron is recovered by a magnetic separator, and then the plastic group (residue) containing non-ferrous metals is crushed secondarily.
Water-specific gravity sorting equipment that separates ultra-light materials (styrene foam, film-like crushed materials, etc.) that float on the water and become foreign matter of PP resin (specific gravity 0.91) by wind power sorting An example of a sewage treatment apparatus for treating sorted water that has contributed to wastewater will be described with reference to the drawings.

(Embodiment 1) As shown in FIG. 1, a water specific gravity separator comprises a floating / sinking water specific gravity separator 13 and an underwater crusher 14.
And a centrifugal water specific gravity separator 15, and the floating / sedimentation water specific gravity separator 13 includes a first tank 18 provided with a screw conveyor 16 and a first drain port 17 from the upstream side, and a second drainage unit. It comprises a second tank 20 provided with a port 19 and a recess 23 provided with a screw-type pusher 21 and a third discharge port 22. The underwater crusher 14 includes an inlet 24 and a motor 25.
And a crushing unit 26 for crushing via a crusher, and a discharge port 27.

As shown in FIG. 2, the centrifugal water-specific-gravity separator 15 includes a raw material supply pipe 28, a cylindrical body 30 rotated by a first motor 29, and a take-out screw 32 rotated by a second motor 31. , A dehydrator 33 fixed to the cylindrical body 30 and a blower 3 for air-conveying the selected polypropylene resin.
4, a first discharge pipe 35 and a second discharge pipe 36, and the second discharge pipe 36 is connected to a solid-liquid separation device 37.

As shown in FIG. 3, the solid-liquid separation device 37
A raw material supply pipe 38 for supplying the sorted styrene resin and the sorted water, a drainer turntable 40 having a mesh bottom rotating via a motor 39, and a blower 42 for air-transporting the styrene resin through a duct 41; Water receiving tank 4
3 and a discharge pipe 44.

On the other hand, the sewage treatment apparatus is provided with a stirrer 48 and a coagulant charging device 49 which communicate with the sewage storage tank 45 via a first pump 46 and a water supply pipe 47, and the treated water overflows into a floc aging tank 51. Coagulant reaction tank 50 to flow, floc ripening tank 51 for growing flocs (aggregates) generated in coagulant reaction tank 50, introduction path 52, inclined plate 53, and water inlet 5
A floc separation tank 56, which is provided with a floc ripening tank 51 provided with a tub 4 and a pipe 55, and separates floc containing treated water overflowed from the floc ripening tank 51 through the overflow port 58 into flocs and treated water; Pump 57. Here, the flock separation tank 56 is configured to separate the flock downward and take out the treated water from above.

The operation of the above configuration will be described. First, the flow of water will be described. Sorted water of the floating / sedimentation type water specific gravity sorter 13 is partially discharged from a first discharge port 1 provided at the bottom of the first tank 18.
7 to the sewage storage tank 45, and a part of the sorted water flows from the second drain port 19 provided at the bottom of the second tank 20 to the sewage storage tank 45 via the solid-liquid separator 37, and the remaining The sorted water is supplied from the third outlet 22 to the submerged crusher 14, the second discharge pipe 36 of the centrifugal water-specific gravity separator 15, and the solid-liquid separator 37.
To the wastewater storage tank 45 via

The flocculant reaction tank 50 and the floc ripening tank 5 from the sewage storage tank 45 via the first pump 46 and the water supply pipe 47.
It is returned to the raw material supply section arrow a of the floating / sedimentation type water specific gravity separator 13 via the first, flock separation tank 56 and the second pump 57.

On the other hand, when the raw material (a group of plastics containing non-ferrous metals after ultra-lightweight removal by wind separation) is supplied to the floating / sedimentation type water specific gravity separator 13 at the raw material supply portion arrow a, a copper wire having a large specific gravity is supplied. Non-ferrous b1 such as aluminum or aluminum pieces sinks immediately at the bottom of the first tank 18 against the flow of the sorting water, and is recovered by the screw conveyor 16. The styrene-based resin b2 having a specific gravity of about 1.05, which is relatively close to the specific gravity of water, gradually sinks to the bottom of the second tank 20 while flowing in the flow of the sorting water, and solid-liquid flows through the second drain port 19. Separated by the separation device 37 and collected.

On the other hand, since the polypropylene resin b3 having a specific gravity of less than 1.0 floats on water, the polypropylene resin b3 is supplied to the centrifugal water-specific-gravity separator 15 via the screw-type pusher 21 and the underwater crusher 14 via the raw material supply pipe 28. Supplied. At this time,
The cylinder 30 is rotating at 2000 r / min.
A separated aqueous phase having a substantially cylindrical shape is formed inside the crushed material, and a centrifugal force of 800 G acts on the supplied crushed material, whereby the crushed material is accurately separated into a substance floating in water and a substance sinking in water.

The polypropylene resin b 3 floating on the water surface on the side of the rotation center shaft is taken out by a blower 34 via a take-out screw 32 and a dehydrator 33 and is conveyed by air through a discharge pipe 35 to be collected. Also, pre-process (floating-water type gravity separator)
The styrene-based resin b2 that sinks in the water that cannot be separated by the above is brought to the inner wall of the cylindrical body 30 by centrifugal force, and is supplied to the solid-liquid separator 37 via the second discharge pipe 36 together with the sorted water, and is separated and collected.

Next, the sewage treatment will be described. Heavy metals (lead) brought together with plastics containing non-ferrous metals,
Metal powder (iron powder), non-ferrous powder (copper, aluminum, zinc, etc.), mud,
The insoluble suspended substances such as mold and dust enter the coagulant reaction tank 50 together with the sorting water, and react with the coagulant supplied to the coagulant reaction tank 50 from the coagulant charging device 49 while being stirred by the stirrer 48. To form flocs (aggregates).

Next, the floc formed, the unreacted flocculant and the unreacted insoluble suspended substance are transferred to the floc ripening tank 51.
The floc reacts with the unreacted flocculant and insoluble suspended solid, and the floc grows larger. The grown floc and the sorting water are introduced into the floc separation tank 56 by the introduction path 5.
The floc supplied through the second plate 2 and separated by the inclined plate 53 accumulates as sludge at the bottom of the floc separation tank 56.

On the other hand, only the clean sorted water from which the flocs have been separated and settled by the inclined plate 53 is returned to the raw material supply unit arrow a via the water sampling port 54, the pipe 55, and the second pump 57.

As described above, the sewage of the water specific gravity separator 13 is put into the coagulant reaction tank 50 equipped with the stirrer 48, and floc (aggregate) of the dirt component is formed by the coagulant. The agent is allowed to act sufficiently on the soil component to grow floc. Next, by separating the floc and the treated water grown in the floc maturation tank 51 in the floc separation tank 56, there is no equipment that has a resistance to the water treatment capacity unlike the conventional sand filtration or ion exchange tower of the sewage treatment apparatus. While operating the floating / sedimentation type water-specific gravity separator 13 in order to carry out large-scale water-specific separation of crushed waste home appliances at least after iron recovery, sending dirty water from the water-specific gravity separator into the coagulant reaction tank 50. The fouling separation tank 56
, The treated water (clean sorting water) can be returned to the water-specific-gravity sorting apparatus, so that the generation of dirt and the water treatment can proceed simultaneously.

As a result, the sorted water cleaned by the sewage treatment apparatus is returned to the top of the floating / sedimentation type water specific gravity sorter 13, so that the sorted water which is contaminated by the raw material supply is purified, and the sorted resin is recontaminated with the sewage. Therefore, when the recycled polypropylene resin b3 is recycled as a material, heat deterioration may occur during pellet processing, or the foreign matter removing screen of the extruder during pellet processing may be immediately clogged, causing a problem in mass productivity. Can be prevented.

Also, since only the dirt component is separated and recovered, the amount of waste can be greatly reduced even when disposed of. However, since the dirt component of waste home appliances has a large amount of iron powder, sludge (separated dirt) is recycled at an ironworks. (Zero landfill). Further, since there is no need to use sand that needs to be replaced or expensive ion-exchange resin that needs to be regenerated, a coagulant can be used, but the running cost is low, the apparatus is simple, and an inexpensive sewage treatment apparatus can be provided. .

It is needless to say that a considerable effect can also be obtained by providing a bypass in parallel with the circulation path of the sorted water and disposing a sewage treatment apparatus partially as a sewage treatment path. In addition, intermittent sewage treatment of the water specific gravity separation device,
It goes without saying that sewage treatment can be performed when discharging wastewater to sewage and the like.

(Embodiment 2) As shown in FIG. 4, a guide plate 59 is provided at the overflow port 58 of the floc ripening tank 51, and the floc (sewage) almost at the bottom of the floc ripening tank 51 overflows with the guide plate 59. It is configured to overflow through the mouth 58. The other configuration and the front and rear systems are the same as those in the first embodiment, and the front and rear systems are omitted.

The operation of the above configuration will be described. Sorted water contaminated with an insoluble suspended substance enters a coagulant reaction tank 50 through a water supply pipe 47, and is stirred by a stirrer 48 while the suspended substance is removed by a coagulant input device 49. Reacts with the flocculant supplied from the above to form flocs, and overflows into the flocs aging tank 51. In the flock aging tank 51, the flock matures and grows,
A large floc has a large mass, so the floc aging tank 51
Settles to the bottom of the.

The sedimented bottom flock is supplied to the flock separation tank 56 from the overflow port 58 via the guide plate 59 via the introduction path 52, and the clean sorted water separated from the flock by the inclined plate 53 is supplied to the sampling port 54. And a pipe 55 and a second pump 57 to return to a raw material supply unit (not shown).

On the other hand, the flocs separated by the inclined plate 53 accumulate as sludge at the bottom 60 of the floc separating tank 56. Further, the flocs floating in a part of the water due to the composition of the insoluble suspended substance (for example, an oily substance) and the adhesion of air bubbles accumulate on the water surface of the floc ripening tank 51, and thus do not overflow into the floc separation tank 56. Other operations are the same as those in the first embodiment.

As a result, the floc that has grown greatly in the floc ripening tank 51 (settled floc) selectively overflows to the floc separation tank 56, so that the floc separation accuracy can be improved, and the floc separation tank can be improved. At 56, good treated water is obtained and can be returned to the floating / sedimentation type water specific gravity separator 13 as clean sorted water.

(Embodiment 3) As shown in FIG. 5, a flock flotation tank (flock separation tank) 62 communicates with a flock maturation tank 51 through a communication pipe 61.
1 is provided with a first wall 63, a second wall 64, a discharge port 65, a supply port 66, and a floc collecting machine 67. Supply port 66
Is connected to a pressurized water supply device 70 (pressurized water supply means) composed of the main components of a pressurizing pump 68 and a pressurizing tank 69, so that pressurized water is supplied to the communication pipe 61. , A first tank 62a and a second tank 62b whose upper parts are separated by a second wall 64, the flocs are separated above the first tank 62a, and the treated water is separated from the first tank 62.
It is configured to be taken out from the second tank 62b communicating with 2a. The system configuration before and after is the same as that of the first embodiment, and the system before and after is omitted.

The operation of the above configuration will be described. Sorted water contaminated with the insoluble suspended substance enters the coagulant reaction tank 50 through the water supply pipe 47, and is stirred by the stirrer 48 while the insoluble suspended substance is removed by the coagulant charging device. It reacts with the flocculant supplied from 49 to form flocs and overflows into the floc ripening tank 51.
In the floc aging tank 51, the floc ages and grows larger, and the mixed solution of the floc and the sorting water enters the communication pipe 61. Clear sorting water supplied from a water supply port 66 of a flock flotation / separation tank 62 is supplied to the communication pipe 61 via a pressurized water supply device 70.

As a result, the dissolved air in the pressurized water becomes fine bubbles in the communication pipe 61 at the normal pressure, and the bubbles, the flocs and the sorting water enter along the first wall 63 of the floc flotation / separation tank 62, The floc is separated by the buoyancy of the bubbles on the surface of the floc flotation / separation tank 62 up to the wall 64, and only clean sorted water dives under the second wall 64 and is supplied from the discharge port 65 through the second pump 57 through the second pump 57. (Not shown).

On the other hand, the flocs floating on the water surface of the floc floating separation tank 62 are collected by a floc collecting machine 67 which is driven to rotate by a motor (not shown). Other operations are the same as those in the first embodiment.

As a result, since the flocs are floated and separated by the buoyancy of fine bubbles, there is no problem even if a component having a composition and easily floated on water, such as an oily substance, is contained in the insoluble suspended substance. That is, the sewage treatment performance is hardly affected by the components of the insoluble suspended substances.

Embodiment 4 As shown in FIG. 6, a small-sized low-speed stirrer (stirring means) 71 is provided in a floc ripening tank 51. Note that the other configuration and the system configuration before and after are the same as those in the first and second embodiments, and the system before and after is omitted.

The operation of the above configuration will be described. The floc, the unreacted insoluble suspended substance, and the unreacted flocculant that have entered the floc ripening tank 51 are gently stirred by a small low-speed stirrer 71 to form floc. And aging is promoted. Further, even if a floc having a large mass is formed, the floc is agitated gently by the small-sized low-speed stirrer 71 so as not to be deposited on the bottom of the floc ripening tank 51. And overflows into the flock separation tank 56. The other basic operations before and after are the same as those in the first and second embodiments, and description thereof will be omitted.

As a result, the formation and aging of flocs are promoted, so that clean sorted water can be returned to the floating / sedimentation type water specific gravity sorting apparatus. In addition, since the floc does not accumulate at the bottom of the floc aging tank 51, the floc can be efficiently collected as sludge in the floc separation tank 56. It goes without saying that a similar effect can be obtained with the configuration of the third embodiment.

(Embodiment 5) As shown in the plan view of FIG.
A plurality of plate members 72 are arranged at predetermined intervals in the floc aging tank 51, and are arranged in a plurality of rows so that the predetermined intervals are alternately arranged, thereby constituting a stirring means. Note that the other configuration and the system configuration before and after are the same as those of the first, second, or third embodiment, and the details are omitted.

The operation of the above configuration will be described. The flocculant is formed by the insoluble suspended substance and the flocculant by the agitator (not shown) in the flocculant reaction tank 50 by the stirring action in the rotating direction. The mixed water of the insoluble suspended substance unreacted with the floc and the sorting water overflows.

The overflowing mixed water increases in flow velocity when passing through the gap between the plate members 72, and the mixing action that bypasses the gap while repeating the relaxation of the flow velocity between the front and rear plate members 72 in the traveling direction causes unreacted material. Reacts to mature the floc, and the matured floc overflows into the floc separation tank 56 through the guide plate 59 and an overflow port (not shown). Other basic operations before and after are the same as those in the first, second, or third embodiment, and a description thereof will be omitted. Needless to say, the same effect can be obtained even if the plate member 72 has a different shape.

As a result, when the floc, the unreacted insoluble suspended solid and the unreacted coagulant flow in the floc ripening tank 51, a change in the flow rate and a change in the flowing direction are added. And a floc having a large mass can be prevented from accumulating.

Embodiment 6 As shown in FIG. 8, a stirrer 48 arranged in a coagulant reaction tank 50 has a plurality of stirring blades 48a and 48b at the top and bottom, and a large stirring blade 48a at the bottom. A small stirring blade 48b is provided on the upper part. The other configuration and the front and rear systems are the same as those of the first to fifth embodiments, and the front and rear system configurations are omitted.

The operation of the above configuration will be described. The wastewater in the coagulant reaction tank 50 is removed by the large stirring blade 48a of the stirrer 48.
In addition, a stirring action is applied to the whole so as not to generate a strong vortex that entrains air in the water, and a vortex that entrains air in the water near the surface of the water by the upper small agitating blade 48b in the same manner as the large agitating blade 48a. A stirring action is applied to such an extent that it does not occur, and the insoluble suspended substance reacts with the flocculant to form flocs. The other basic operations before and after are the same as those in the first to fifth embodiments, and the description is omitted.

As a result, the agitation action is applied to the entire sewage without causing a vortex that entrains air into the water in the coagulant reaction tank 50, and bubbles are not attached to the formed flocs. Flock can be prevented from accumulating on the water surface of the flock aging tank 51. In addition, stirrer 4
Since the rotation of 8 can be slowed, breakage of the formed flocks can be prevented.

Embodiment 7 As shown in FIG. 9, a bentonite supply device 73 (inorganic substance supply means) for supplying bentonite powder as a clay mineral is provided in the coagulant reaction tank 50. The other configuration and the system configuration before and after are the same as those in the first to sixth embodiments.

The operation of the above configuration will be described. When the sorted water contaminated with the insoluble suspended substance enters the coagulant reaction tank 50 via the water supply pipe 47, the agitator 48 is set in the coagulant reaction tank 50.
The clay mineral bentonite powder is supplied from the bentonite supply device 73 to the place where the agitation is performed, and the coagulant is supplied from the coagulant supply device 49 at the same time. The supplied bentonite powder becomes a nucleus of floc formation, and the flocculant and the insoluble suspended substance react to form a good floc, and overflow into the floc ripening tank 51. In addition, when the insoluble suspended solids in the sorted water are reduced, bentonite flocs are formed.

As a result, a good large floc is formed, so that a good separation between the floc and clean sorting water can be obtained. In addition, when the insoluble suspended substance in the separation water becomes low, the flocculant becomes in an excess state, and the insoluble suspended substance in the water specific gravity separator (not shown) and the excess coagulant brought in by the water specific gravity separator are used. A floc is formed inside (not shown) to prevent re-contamination of the sorted plastic and the water specific gravity sorting device (not shown). Other basic operations are the same as those in the first to sixth embodiments, and a description thereof will be omitted. In addition,
It goes without saying that the same effect can be obtained even if the bentonite solution in which the bentonite powder is dissolved in advance is supplied to the flocculant reaction tank 50.

Eighth Embodiment As shown in FIG. 10, a filter press (flock collecting means) 75 is disposed via a valve 74 provided at the bottom of a flock separation tank 56, and a storage tank 76 is provided in the filter press 75. And the pump 77 are connected. Other configurations are the same as those of the first and second embodiments and the fourth to seventh embodiments.

The operation of the above configuration will be described. The sludge (flock deposits) deposited on the bottom 60 of the floc separating tank 56 flows into the filter press 75 via a valve 74 provided on the bottom 60 of the floc separating tank 56, and is squeezed. The sludge is discharged from the arrow c, and the clean sorted water from which the sludge has been filtered is supplied to a raw material supply unit (not shown) of a floating / sedimentation type water specific gravity sorter (not shown) by a pump 77 through a storage tank 76.
Is returned to. The other basic operations and the operations before and after are the same as those in the first and second embodiments and the fourth to seventh embodiments, and the description thereof is omitted.

As a result, the sludge can be automatically collected from the floc separation tank 56 while operating the wastewater treatment.

(Embodiment 9) As shown in FIG. 11, a first filtration device (flock recovery means) 78 and a second filtration device (flock recovery means) 79 are provided at the bottom of a floc separation tank 56. The first filtration device 78, the second filtration device 79, and the pump 80 are communicated with the flocculant reaction tank 50 through the first filtration device 78, the first filtration device 78, The water separated by the second filtering device 79 is returned to the flocculant reaction tank 50. The other configuration and the system configuration before and after are the same as those in the first and second embodiments and the fourth to seventh embodiments.

The operation of the above configuration will be described. Sludge is supplied from the bottom of the floc separation tank 56 to the first filtration device 78 via the valve 74, and the roughly filtered sludge liquid is supplied to the second filtration device 79. The filtrate supplied from the second filtration device 79 is supplied through the pump 80 to the coagulant reaction tank 50.
The sludge which cannot be filtered is again reacted with the flocculant in the flocculant reaction tank 50 to form a floc.

As a result, sludge can be collected by a simple filtration device. Further, the sludge that has not been completely filtered is returned to the coagulant reaction tank 50 again and reacts with the coagulant again, so that the sorted water cleaned by the sewage treatment apparatus is not polluted.

(Embodiment 10) As shown in FIG. 12, a caustic soda charging device 81 is provided in the floating / sedimentation type water specific gravity separator 13, a PH meter 82 is provided in the floc aging tank 51, and the caustic soda charging device 81 is turned on and off. The caustic soda charging device 81 is turned on and off within the range of the upper limit value and the lower limit value set in the PH meter 82 by a control device (not shown) for controlling.
It is configured so that the pH of sewage which has been turned off and which has contributed to the operation of sorting crushed waste electric home appliances by water specific gravity is controlled to PH 8.5 to PH 10 in advance and treated. Other configurations are the same as those of the first and second embodiments and the fourth to eighth embodiments.

The operation of the above configuration will be described. When the indicated value of the PH meter 82 provided in the floc
When the value reaches 8.5, the caustic soda liquid is introduced into the separation liquid from the caustic soda introduction device 81 provided in the floating / sedimentation type water specific gravity separator 13, and when the indicated value of the PH meter 82 becomes PH 9.5, the caustic soda introduction device 81 is stopped. Then, the introduction of the caustic soda is stopped, and the pH of the sorted water is controlled to be always between PH 8.5 and PH 10.

As a result, since the amount of heavy metals dissolved in the sorting water is extremely low between PH 8.5 and PH 10, the heavy metals contained in the crushed waste household appliances are mostly in the sorted water as particulate insoluble suspension materials. Present and can be separated and recovered with a flocculant. Further, since the plastic is sorted and collected while collecting the heavy metals in the sorted water, the contamination of the plastic by the heavy metals can be prevented. It is needless to say that the same effects can be obtained with the configurations of the present embodiment and the third embodiment.

(Embodiment 11) As shown in FIG. 13, a heavy metal reaction tank 85 is provided with a stirrer 83 and a chelating agent charging device 84.
The heavy metal reaction tank 85 is provided in a process preceding the flocculant reaction tank 50. Other configurations are the same as those of the first and second embodiments.
And the same as Examples 4 to 8.

The operation of the above configuration will be described. The sewage of the floating / sedimentation type water specific gravity separator 13 and the centrifugal type water specific gravity separator 15 is supplied to the heavy metal reaction tank 85 via the sewage storage tank 45 and the first pump 46. The heavy metal dissolved by the stirring action of the stirrer 83 is supplied from the chelating agent feeding device 84 to the heavy metal reaction tank 8.
5 reacts with the chelating agent supplied to 5 to become an insoluble substance, and together with other insoluble suspended substances, the coagulant reaction tank 50
Spill over. Insoluble substances (reactants of heavy metals and chelating agents) and other insoluble suspended substances react with the flocculant to form flocs. The other basic operations are the same as those in the first and second embodiments and the fourth to eighth embodiments, and a description thereof will be omitted.

As a result, since the heavy metal dissolved in the sorting water is used as the insoluble substance, the heavy metal can be separated from the sorting water by the coagulant, so that clean sorting water containing almost no heavy metal can be obtained. It is needless to say that the same effects can be obtained with the configurations of the present embodiment and the third embodiment.

(Embodiment 12) As shown in FIG. 14, a turbidity detecting device 86 is provided in a sewage storage tank 45 and detects turbidity of sewage which has contributed to an operation of sorting crushed household electrical appliances by water density. It is configured as follows. Other configurations are the same as those in the eleventh embodiment.

The operation of the above configuration will be described. The sewage of the floating / sedimentation type water gravity separator 13 and the centrifugal water gravity separator 15 flows into the wastewater storage tank 45, and the turbidity detector 86 detects the turbidity of the flowed wastewater. And display. At this time, when the turbidity is low (the amount of insoluble suspension is small),
When the chelating agent feeding device 84, the flocculant feeding device 49, the bentonite feeding device 73, the stirrer 48 and the stirrer 71 are stopped, and the turbidity becomes high (there are many insoluble suspended substances), the chelating agent feeding device 84 The coagulant charging device 49, the bentonite supply device 73, the stirrer 48, and the stirrer 71 are started. The other basic operations are the same as those in the first and second embodiments, the fourth to eighth embodiments, and the eleventh embodiment, and a description thereof will be omitted.

As a result, the chemicals (chelating agent, bentonite, flocculant) are charged while operating the stirrer only when the sorting water is dirty, so that it is possible to run economically. It is needless to say that the same effects can be obtained with the configuration of the present embodiment and the configuration of the third or tenth embodiment.

(Embodiment 13) In response to a signal from a turbidity detecting device 86 shown in FIG. 14, a control device (not shown) controls a chelating agent feeding device 84, a flocculant feeding device 49, a bentonite feeding device 73, and a stirrer 48. It is configured to control the stirrer 71. Other configurations are the same as those of the twelfth embodiment.

The operation of the above configuration will be described. The turbidity of the turbidity detecting device 86 is low (the amount of insoluble suspended substances is small).
At the time of a signal, the chelating agent feeding device 84, the flocculant feeding device 49, the bentonite feeding device 73, the stirrer 48, and the stirrer 71 are stopped, and when the signal has a high turbidity (a lot of insoluble suspended substances), the chelating agent is turned on. The charging device 84, the flocculant charging device 49, the bentonite supply device 73, the stirrer 48, and the stirrer 71 are started. Other basic operations are the same as those of the first and second embodiments, the fourth to eighth embodiments, and the eleventh embodiment.
Description is omitted.

As a result, the sewage treatment apparatus can be automatically operated according to the degree of contamination of the sorted water, and the system can be operated economically. It is needless to say that the same effects can be obtained with the configuration of the present invention and the above-described third or tenth embodiment.

[0086]

As described above, according to the first aspect of the present invention, there is provided a flocculant reaction tank having a stirrer into which sewage which has contributed to the operation of sorting crushed waste home appliances by water specific gravity is introduced. Since a floc ripening tank for growing flocs (aggregates) generated in the flocculant reaction tank and a floc separation tank communicating with the floc ripening tank and separating the flocs from the treated water are provided, they are used for water density separation. Insoluble dirt present as a suspended substance in the sorting water is formed into flocs (aggregates) with a flocculant, grown further in a floc aging tank, and separated into flocs and treated water (clean sorting water) in a floc separation tank. As a result, the PP resin selected for material recycling is not contaminated with metal powder, non-ferrous, mud, mold, etc. contained in the crushed waste home appliances. When processed into let, or thermal degradation of a metal powder, the clogging immediately screen with foreign matter extruder can be prevented. Further, it is possible to provide an inexpensive and compact sewage treatment apparatus that can be used as a water specific gravity sorting apparatus and a closed system. Furthermore, only the sludge (flock sediment) needs to be disposed of, so that the amount of waste can be reduced, and the sludge of waste home appliances containing much iron can be recovered in a blast furnace.

According to the second aspect of the present invention, the treatment water is caused to overflow from the flocculation reaction tank to the floc ripening tank, and is further allowed to overflow from the floc ripening tank to the floc separation tank. Since the sewage treatment from coagulation to separation is performed without applying the mechanical force of the above, it is possible to prevent the formed flocs (agglomerates) from being destroyed. Obtainable. Further, since there is no mechanical drive part, a failure hardly occurs, and the equipment cost can be reduced.

According to the third aspect of the present invention, since the means for overflowing the sewage substantially at the bottom of the floc ripening tank is provided, the insoluble suspended substance and the coagulant react sufficiently to increase the mass. The flocs can be caused to overflow into the floc separating tank, so that the flocs floating in the water containing the air bubbles or the flocs or oily substances can be prevented from overflowing into the floc separating tank. As a result, the separation of the floc and the sorted water in the floc separation tank becomes good, and clean treated water can be obtained.

According to the fourth aspect of the present invention, since the floc separating tank is configured to separate the flocs downward and take out the treated water from above, the flocs are settled by their own weight to separate them from the treated water. Therefore, it can be realized with a flock separation tank having a simple structure, and there are few failures and the equipment cost can be reduced.

According to the fifth aspect of the present invention, the pressurized water supply means for supplying pressurized water from the bottom of the flock separation tank is disposed, and the flock separation tank separates the aggregates above the first tank. Since the treated water is taken out from the second tank communicating with the first tank, the floc is separated from the sorting water by the buoyancy of fine bubbles because of the buoyancy of fine bubbles. Nothing. As a result, it is possible to obtain treated water in which floc is hardly mixed even without a filter material such as a filter.

According to the sixth aspect of the present invention, since the stirring means is provided in the floc ripening tank, the unreacted flocculant which has not been completely reacted in the flocculant reaction tank reacts with the insoluble suspended substance. Grows. Further, in the overflow flow, flocs having a mass large enough to accumulate at the bottom of the floc aging tank can overflow into the floc separation tank. As a result, it is possible to further excellently separate the dirt in the sorted water and deposit the floc only on the bottom of the floc separation tank.

According to the seventh aspect of the present invention, the agitator of the agglutination reaction tank has a plurality of agitating blades on the upper and lower sides, and the agitating blades are enlarged on the bottom side. Even with a low-speed stirring stirrer, the inside of the flocculant reaction tank can be sufficiently stirred. As a result, since no air bubbles are attached to the flocs, good flocs can be separated.

According to the invention of claim 8, since the coagulation reaction tank has an inorganic substance supply means, even when the amount of insoluble suspended solids in the sewage is small, the inorganic substances can be used as nuclei to form large flocs. Yes, and excess flocculant forms inorganic flocs. As a result, good sewage treatment can be performed even with less sewage. Further, it is possible to prevent the flocculant from being brought into the treated water and reacting with the dirt in the water specific gravity separator to contaminate the separation resin and the water specific gravity separator.

According to the ninth aspect of the present invention, since the floc collecting means communicating with the bottom of the floc separating tank is arranged, sludge (flock deposits) deposited on the bottom of the floc separating tank can be collected. If a water specific gravity separator and a closed system (circulation) are used, sludge can be collected while the entire system is operating.

According to the tenth aspect of the present invention,
Since the water separated by the floc collecting means is returned to the flocculation reaction tank, even if the floc could not be completely recovered by the simple floc collecting means, the flocs that could not be recovered and the broken flocs were destroyed. It is returned to the flocculant reaction tank and forms flocs again with other insoluble suspended substances to be processed. As a result, flocs can be collected and good treated water can be obtained even with inexpensive flocks collecting means.

According to the eleventh aspect of the present invention,
Since the pH of the sewage that has contributed to the operation of sorting the crushed waste home appliances to water specific gravity is controlled to PH 8.5 to PH 10 and treated, lead (solder: lead-tin alloy) contained in the crushed waste home appliances And the solubility of heavy metals such as. As a result, heavy metals in sewage are present as almost undissolved suspended substances, so they can be separated and recovered as sludge with a flocculant,
The treated water can provide a sewage treatment apparatus that satisfies river and sewerage wastewater treatment standards.

According to the twelfth aspect of the present invention,
Since the heavy metal reaction tank is provided before the agglutination reaction tank, heavy metals dissolved in the wastewater can be converted into water-insoluble compounds with a chelating agent. As a result, heavy metals once dissolved in water can be separated and recovered by forming flocs similarly to suspended substances insoluble in other water. Needless to say, the sewage and river drainage standards can be sufficiently cleared.

According to the thirteenth aspect of the present invention,
Since a turbidity detector that detects the turbidity of sewage that has contributed to the separation of crushed waste home appliances by water density has been installed, the degree of contamination of the sorted water can be quantitatively detected in real time.
It is possible to effectively operate the sewage treatment apparatus or adjust the amount of chemicals (chelating agent, flocculant, bentonite, etc.) to reduce the loss or adjust the finishing level of the treated water.

According to the fourteenth aspect of the present invention,
Since at least the means for supplying the inorganic substance or the means for feeding the coagulant is controlled in conjunction with the turbidity detecting device, the wastewater treatment device can be operated effectively and unattended.

[Brief description of the drawings]

FIG. 1 is a partially cutaway system configuration diagram of a waste home appliance recycling processing apparatus provided with a sewage treatment apparatus according to a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a centrifugal specific gravity sorting device of the waste home appliance recycling processing device.

FIG. 3 is a cross-sectional view of a main part of a solid-liquid separation device of the waste home appliance recycling apparatus.

FIG. 4 is a longitudinal sectional view of a sewage treatment apparatus of a waste home appliance recycling treatment apparatus according to a second embodiment of the present invention.

FIG. 5 is a partially cutaway system configuration diagram of a wastewater treatment device of a waste home appliance recycling treatment device according to a third embodiment of the present invention.

FIG. 6 is a longitudinal sectional view of a sewage treatment device of a waste home appliance recycling treatment device according to a fourth embodiment of the present invention.

FIG. 7 is a plan view of a main part of a sewage treatment apparatus of a waste home appliance recycling apparatus according to a fifth embodiment of the present invention.

FIG. 8 is a longitudinal sectional view of a wastewater treatment device of a waste home appliance recycling treatment device according to a sixth embodiment of the present invention.

FIG. 9 is a longitudinal sectional view of a sewage treatment device of a waste home appliance recycling treatment device according to a seventh embodiment of the present invention.

FIG. 10 is a partially cutaway system configuration diagram of a wastewater treatment device of a waste home appliance recycling treatment device according to an eighth embodiment of the present invention.

FIG. 11 is a partially cutaway system configuration diagram of a wastewater treatment device of a waste home appliance recycling treatment device according to a ninth embodiment of the present invention.

FIG. 12 is a partially cutaway system configuration diagram of a waste home appliance recycling processing apparatus provided with a sewage treatment apparatus according to a tenth embodiment of the present invention.

FIG. 13 is a partially cutaway system configuration diagram of a waste home appliance recycling processing apparatus provided with a sewage treatment apparatus according to an eleventh embodiment of the present invention.

FIG. 14 is a partially cutaway system configuration diagram of a waste home appliance recycling processing apparatus provided with a sewage treatment apparatus according to a twelfth embodiment of the present invention.

FIG. 15 is a system configuration diagram of a conventional water specific gravity separator and a sewage treatment apparatus.

[Explanation of symbols]

 48 Stirrer 50 Flocculant reaction tank 51 Flock aging tank 56 Flock separation tank

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) B03B 7/00 B03B 7/00 9/06 9/06 C02F 1/58 C02F 1/58 F term (reference) 4D015 BA19 BA24 BB06 CA20 DA32.

Claims (14)

[Claims] 1. A flocculant reaction tank having a stirrer into which sewage that has contributed to the operation of separating crushed waste home appliances into water with specific gravity, and a floc for growing flocs generated in the flocculant reaction tank A sewage treatment apparatus for a waste home appliance recycling treatment apparatus, comprising: an aging tank; and a flock separation tank that communicates with the flock aging tank and separates the flock and treated water. 2. The wastewater treatment of a waste home appliance recycling apparatus according to claim 1, wherein the treated water overflows from the flocculation reaction tank to the floc maturation tank, and further flows from the floc maturation tank to the floc separation tank. apparatus. 3. The sewage treatment apparatus for a waste home appliance recycling treatment apparatus according to claim 1, further comprising means for overflowing sewage substantially at the bottom of the floc ripening tank. 4. The floc separation tank according to claim 1, wherein the floc is separated downward and treated water is taken out from above.
The sewage treatment apparatus for a waste home appliance recycling treatment apparatus according to any one of the items 3 to 7. 5. A pressurized water supply means for supplying pressurized water from the bottom of the floc separation tank, wherein the floc separation tank separates aggregates above the first tank and communicates treated water with the first tank. 4. The method according to claim 1, wherein the first tank is taken out of the second tank.
The wastewater treatment device for a waste home appliance recycling treatment device according to any one of the above. 6. The sewage treatment apparatus for a waste home appliance recycling apparatus according to claim 1, wherein a stirring means is provided in the floc aging tank. 7. The agitation device for an agglutination reaction tank has a plurality of upper and lower stirring blades, and the stirring blades are enlarged on the bottom side.
A sewage treatment device for a waste home appliance recycling treatment device according to any one of claims 6 to 10. 8. The sewage treatment apparatus for a waste home appliance recycling apparatus according to claim 1, further comprising an inorganic substance supply means in the coagulation reaction tank. 9. The sewage treatment apparatus for a waste home appliance recycling apparatus according to any one of claims 1 to 4, wherein a floc collection means communicating with the bottom of the floc separation tank is arranged. 10. The sewage treatment apparatus of a waste home appliance recycling treatment apparatus according to claim 9, wherein the water separated by the floc collection means is returned to the flocculation reaction tank. 11. The waste home appliance according to any one of claims 1 to 10, wherein the pH of the sewage that has contributed to the operation of sorting crushed waste home appliance water by specific gravity is controlled to PH 8.5 to PH 10, and treated. Wastewater treatment equipment for recycling equipment. 12. The sewage treatment apparatus for a waste home appliance recycling treatment apparatus according to claim 1, wherein a heavy metal reaction tank is provided before the flocculation reaction tank. 13. The waste home appliance according to any one of claims 1 to 12, further comprising a turbidity detecting device for detecting turbidity of sewage which has contributed to an operation of sorting crushed waste home appliances by water specific gravity. Wastewater treatment equipment for resource recycling equipment. 14. The sewage treatment apparatus for a waste home appliance recycling treatment apparatus according to claim 13, wherein at least an inorganic substance supply means or a coagulant charging means is controlled in conjunction with the turbidity detection apparatus.