JP4117988B2 - Water treatment equipment for waste treatment equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention recovers a reusable substance from washing water generated when removing harmful components contained in exhaust gas or flammable gas generated by, for example, thermal decomposition of waste, and obtains clean washing water The present invention relates to a water treatment apparatus for a waste treatment apparatus.
[0002]
[Prior art]
Today, a large-scale waste treatment apparatus is used to thermally treat waste contaminated with harmful substances. When this waste or the like is treated by incineration or thermal decomposition, a large amount of exhaust gas and combustible gas are generated, and these gases contain harmful components, and a wet gas cleaning device is used to remove this. The cleaning water discharged from the wet gas cleaning device is purified in the water treatment device and collected for reuse or discharged to the environment when not reused. In general, harmful components are dust, metal compounds, total organic carbon components, salts, and the like, which are treated as waste.
[0003]
[Problems to be solved by the invention]
Normally, waste contaminated with these harmful components is put into the waste treatment equipment in a state where various substances are mixed, so if you do not take measures to finely separate each substance, all waste will eventually become hazardous waste. It must be processed as a thing. However, there are many useful substances in the waste, and there is a need to improve the water treatment equipment by reusing these substances.
[0004]
An object of the present invention is to provide a water treatment apparatus for a waste treatment apparatus capable of recovering a reusable substance as safe as possible and keeping the amount of waste to a minimum.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the invention of claim 1 is a storage tank for storing the cleaning water discharged from the wet gas cleaning device and adjusting the pH of the cleaning water to an appropriate range in which metal hydroxide can be obtained. , Receiving and storing wash water from the storage tank, separating the metal hydroxide and all organic carbon components contained in the wash water, and the slurry containing the metal hydroxide discharged from the precipitation tank and the whole In a water treatment apparatus for a waste treatment apparatus, comprising a dewatering device that squeezes a mixture with an organic carbon component to remove moisture and generate a dry solid, wherein the precipitation tank is separated from each other by a partition member A tank and a second settling tank, an inlet valve for supplying cleaning water to the first settling tank and the second settling tank individually, and an outlet valve for discharging treated water from the first settling tank and the second settling tank individually Special features To.
[0006]
In the above aspect, it becomes possible to separate the metal hydroxide, dust, all organic carbon components, and salt contained in the cleaning water discharged from the wet gas cleaning device, and reuse them as industrial raw materials. It can be recovered as a possible substance. In addition, the amount of waste discharged outside the system can be greatly reduced.
[0017]
Moreover, it becomes possible to change the residence time of the wash water in the 1st precipitation tank and the 2nd precipitation tank according to the state of the wash water, and the separation function of the metal hydroxide can be further improved.
[0020]
The invention of claim 2 stores the cleaning water discharged from the wet gas cleaning device, and adjusts the pH of the cleaning water to an appropriate range in which metal hydroxide can be obtained, and the cleaning water from this storage tank. Receive and store water, squeeze a mixture of a precipitate layer that separates the metal hydroxide and all organic carbon components contained in the wash water, and a slurry containing the metal hydroxide discharged from the settling tank and all organic carbon components to remove moisture, the waste treatment apparatus water treatment apparatus comprising a dewatering device for generating a dry solid, a first settling tank and a second settling tank settling tank are separated from each other, the first precipitate Based on the turbidity signal from the turbidity meter, the inlet valve that supplies wash water to the tank and the second settling tank individually, the turbidity meter that detects the turbidity of the treated water flowing through the treated water discharge path of the settling tank The first sedimentation tank inlet valve and the second sedimentation tank Characterized in that it comprises a control device for outputting a command for controlling the opening and closing of the inlet valve of the vessel.
[0021]
In the above aspects, the residence time of the washing water in the settling tank can be changed according to the turbidity of the treated water, and the metal hydroxide separation function can be further improved.
[0026]
The invention of claim 3 stores the cleaning water discharged from the wet gas cleaning device, and adjusts the pH of the cleaning water to an appropriate range in which metal hydroxide can be obtained, and the cleaning water from this storage tank. Receive and store water, squeeze a mixture of a precipitate layer that separates the metal hydroxide and all organic carbon components contained in the wash water, and a slurry containing the metal hydroxide discharged from the settling tank and all organic carbon components In the water treatment device for a waste treatment apparatus comprising a dehydration device that removes moisture and generates dry solids, a treatment water tank that collects the treated water discharged from the dehydration device, and a The 1st filtration apparatus and reverse osmosis membrane which are equipped with the filtration apparatus which filters treated water, and the water purification tank which collect | recovers the clean water discharged | emitted from this filtration apparatus, and a filtration apparatus filters solid content with the filter which consists of hollow fibers B Characterized in that it is constituted by a second filtration device for processing.
[0027]
In the embodiment as described above, the solid content in the treated water is surely filtered with a filter made of hollow fiber, and the dissolved salt contained in the treated water is concentrated with a reverse osmosis membrane to obtain clean water with a low salt concentration. Can do.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
A first embodiment of the present invention will be described with reference to the drawings. In FIG. 1, the water treatment apparatus has a storage tank 1 for receiving and storing wash water. The storage tank 1 includes a stirrer 2 in the tank. Furthermore, an acid solution supply device 3 and an alkaline solution supply device 4 connected to the storage tank 1 are provided. Moreover, it has the washing water pump 5 which transfers washing water.
[0029]
Further, the water treatment apparatus includes a settling tank 6 and an aeration tank 7. The settling tank 6 has a scum pocket 8. The precipitation layer 6 separates the metal hydroxide and the total organic carbon (hereinafter referred to as TOC) component using the specific gravity difference. The aeration tank 7 includes treated bubble generator 9 containing air in the treated water, and dust is attached to the generated bubbles to separate them. Moreover, the settling tank 6 has a slurry transfer pump 10 for transferring the slurry.
[0030]
Furthermore, the water treatment apparatus has a slurry receiving tank 11 for collecting slurry and a dust receiving tank 12 for collecting dust. The slurry receiving tank 11 includes a stirrer 13 in the tank. The dust receiving tank 12 includes a stirrer 14 in the tank. The slurry receiving tank 11 has a slurry supply pump 15 for supplying the slurry.
[0031]
On the other hand, the water treatment apparatus includes a dehydration apparatus 16. The dehydrator 16 filters metal hydroxides, dust, and a mixture of dust and TOC components, and further squeezes them separately to remove moisture and generate dry solids. The dehydrator 16 has a container 17 for collecting each solidified component.
[0032]
Further, a treated water tank 18 is provided on the downstream side of the dehydrator 16 to receive and store treated water. The treated water tank 18 has a treated water pump 19 for transferring treated water. Moreover, the 1st filtration apparatus 20 which has the filter which consists of hollow fibers in the downstream of the treated water pump 19 is provided. The first filtration device 20 has a high-pressure pump 21.
[0033]
Furthermore, the water treatment device includes a second filtration device 22 that filters the treated water using a reverse osmosis membrane. Further, a water purification tank 23 is provided on the downstream side of the second filtration device 22. In the figure, reference numeral 24 denotes a transfer pump for supplying treated water.
[0034]
The present embodiment has the above-described configuration, and the wash water discharged from the wet gas cleaning device is collected in the storage tank 1, and the acid solution supplied from the acid solution supply apparatus 3 according to the pH value by the agitator 2 in the tank, and Stir continuously. Depending on the pH value of the washing water, the alkaline solution supplied from the alkaline solution supply device 4 is continuously stirred. In this step, the pH value is desirably adjusted in the range of 7 to 10. At this time, metal ions in the washing water are precipitated as hydroxides.
[0035]
This washing water is extracted from the storage tank 1 by the washing water pump 5 and sent to the precipitation tank 6, where the TOC component having a small specific gravity floats on the water surface, while the metal hydroxide having a large specific gravity settles at the bottom of the precipitation tank 6. To do. The TOC component rides on the flow of water, collects in the scum pocket 8, and is sent to the dust receiving tank 12. The metal oxide is extracted by the slurry transfer pump 10 and sent to the slurry receiving tank 11. The slurry sent to the slurry receiving tank 11 is stirred by the stirrer 13 in the tank, and the dust sent to the dust receiving tank 12 is stirred by the stirrer 14 so as not to settle to the bottom.
[0036]
On the other hand, dust having a specific gravity substantially equal to that of water is introduced into the aeration tank 7 from the rear part of the settling tank 6 together with the washing water. In order to separate the dust, a part of the treated water in the aeration tank 7 is guided to the foam generator 9 and mixed with air in the treated water, and then supplied to the aeration tank 7. In the aeration tank 7, air bubbles are generated by the supplied air, and rises toward the water surface. At this time, dust floating on the surface of the bubbles adheres, rides on the flow of water in the aeration tank 7, reaches the overflow portion, and is sent to the dust receiving tank 12 from there.
[0037]
Further, the solid content settled on the bottom of the aeration tank 7 is sent to the dust receiving tank 12. The treated water in the aeration tank 7 is extracted by the transfer pump 24 and supplied to the wet gas cleaning device as clean cleaning water.
[0038]
On the other hand, the slurry in the slurry receiving tank 11 is extracted by the slurry supply pump 15 and sent to the dehydrator 16. The dust in the dust receiving tank 12 and the mixture of the dust and the TOC component are extracted by the slurry supply pump 15 and sent to the dehydrator 16. In the dehydrator 16, the slurry containing metal hydroxide is filtered. Also, water containing dust and a mixture of dust and TOC component is filtered.
[0039]
After completing the filtration process, they are squeezed to remove moisture to form a solid. In this step, the pressing pressure is desirably kept in the range of 5 to 15 bar. The obtained metal hydroxide is recovered in the container 17. The solidified dust and the mixture of the dust and the TOC component are collected in the container 17 or sent to an incinerator or a pyrolysis furnace by a conveying device (not shown).
[0040]
Furthermore, a large amount of water is generated in the dehydration process of the dehydrator 16. This water is collected in the treated water tank 18, extracted from the treated water tank 18 by the treated water pump 19 and sent to the first filtration device 20, where solid matter is filtered by a filter made of hollow fibers. The backwash water generated by the filtration process is sent to the inlet of the settling tank 6.
[0041]
Furthermore, the treated water from which the solid content has been removed is extracted by the high-pressure pump 21, introduced into the second filtration device 22, and filtered through the reverse osmosis membrane. In this filtration treatment, the dissolved salt in the treated water is almost completely removed by the reverse osmosis membrane. Thereby, clean water with a low salt concentration can be obtained. The concentrated liquid is made into a waste according to the contents or recovered as an industrial raw material. On the other hand, the treated water is transferred to the septic tank 23 and recovered as quencher cooling water or system water.
[0042]
As described above, in the present embodiment, it becomes possible to separate the metal hydroxide, dust, TOC component, and salt contained in the cleaning water discharged from the wet gas cleaning device, and reuse them as industrial raw materials. It can be recovered as a possible substance. In addition, the amount of waste discharged outside the system can be greatly reduced. Furthermore, it becomes possible to remove impurities in the washing water almost completely, and it is possible to supply clean washing water.
[0043]
(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIG. The water treatment device includes dehydration devices 16a and 16b. The dehydrator 16a filters the metal hydroxide and further squeezes it to remove moisture, thereby obtaining a dry solid. In addition, the dehydrator 16b filters the dust, a mixture of the dust and the TOC component, and further squeezes to remove moisture, thereby generating a dry solid. These dehydrators 16a and 16b have containers 17a and 17b for collecting the solidified components. In the figure, reference numerals 15a and 15b denote slurry supply pumps.
[0044]
This embodiment has the above-described configuration, and can obtain a desirable function similar to that of the first embodiment. In particular, in the present embodiment, filtration and dehydration are performed for each component in each dehydrator 16a, 16b. The slurry containing the metal hydroxide is introduced into the dehydrator 16a where it is filtered. Further, water containing dust and a mixture of the dust and the TOC component is introduced into the dehydrator 16b and filtered there.
[0045]
After completing the filtration step, the slurry is squeezed to remove moisture to form a solid. The obtained metal hydroxide is recovered in the container 17a. The solidified dust and the mixture of the dust and the TOC component are collected in the container 17b or sent to an incinerator or a pyrolysis furnace by a conveying device (not shown).
[0046]
As described above, in the present embodiment, each component can be applied to the dehydrating devices 16a and 16b, and filtration and dehydration can be continuously performed.
[0047]
(Third embodiment)
A third embodiment of the present invention will be described with reference to FIG. The water treatment apparatus has an injection pump 26 in the path of the acid solution supply apparatus 3 and an injection pump 27 in the path of the alkaline solution supply apparatus 4. Further, a pH meter 28 for detecting the pH of the washing water in the storage tank 1 and a control device 29 for controlling the injection amounts of the injection pumps 26 and 27 are provided. Other configurations are the same as those in the first embodiment.
[0048]
This embodiment has the above-described configuration, and can obtain a desirable function similar to that of the first embodiment. In particular, in the present embodiment, the pH of the cleaning water is monitored to efficiently generate metal hydroxide. When cleaning water is introduced into the storage tank 1, the pH of the cleaning water is detected by the pH meter 28, and a pH signal is input to the control device 29.
[0049]
The control device 29 is provided with pH 7 as a specified value, and when the pH signal falls below pH 7, a command to keep the injection amount at the maximum is output to the injection pump 27. At this time, the alkaline solution from the alkaline solution supply device 4 is mixed with the washing water in the storage tank 1. Moreover, pH10 is given to the control apparatus 29 as a regulation value, When the pH signal exceeds pH10, the command which keeps the injection | pouring amount to the maximum with respect to the injection | pouring pump 26 is output. At this time, the acid solution from the acid solution supply device 3 is mixed with the washing water in the storage tank 1. As a result, the pH can be automatically maintained in the range of pH 7 to pH 10, and a heavy metal hydroxide can be efficiently generated.
[0050]
Thus, in the present embodiment, the pH of the cleaning water can be maintained at a desired value, and the metal hydroxide can be efficiently generated.
[0051]
(Fourth embodiment)
A fourth embodiment of the present invention will be described with reference to FIG. The inside of the settling tank 6 is divided into two regions, that is, a first settling tank 31 and a second settling tank 32 by a partition plate 30 arranged along the flow. Each of the first settling tank 31 and the second settling tank 32 includes an inlet valve 33 and an inlet valve 34, and an outlet valve 35 and an outlet valve 36. Other configurations are the same as those in the first embodiment.
[0052]
This embodiment has the above-described configuration, and can obtain a desirable function similar to that of the first embodiment. In particular, in the present embodiment, the residence time of the washing water is made different between the first precipitation tank 31 and the second precipitation tank 32, thereby improving the metal hydroxide separation function. The washing water flows into the first settling tank 31 through the inlet valve 33 and into the second settling tank 32 through the inlet valve 34. In the first settling tank 31 and the second settling tank 32, the TOC component having a small specific gravity floats on the water surface, while the metal hydroxide having a large specific gravity settles at the bottom of the settling tanks 31 and 32, respectively.
[0053]
During this separation, for example, when the washing water is not sufficiently stirred and the metal hydroxide settles unevenly, settling does not proceed. Allow the hydroxide to settle. Thereby, a residence time can be changed according to the state of washing water, and a metal hydroxide can be separated.
[0054]
As described above, in the present embodiment, the retention time of the wash water in the first and second precipitation layers 31 and 32 can be changed according to the state of the wash water to improve the metal hydroxide separation function.
[0055]
(Fifth embodiment)
A fifth embodiment of the present invention will be described with reference to FIG. The settling tank 6 includes a transfer device 37 in the tank. The transfer device 37 includes a belt 38, a chain 39, a sprocket 40, and a motor 41. The belt 38 has a plurality of feed plates 42 arranged at regular intervals. Other configurations are the same as those in the first embodiment.
[0056]
This embodiment has the above-described configuration, and can obtain a desirable function similar to that of the first embodiment. In particular, in this embodiment, when washing water is introduced into the sedimentation tank 6, the motor 41 of the transfer device 37 is started and the belt 38 is rotated. When the belt 38 rotates, the feed plate 42 moves from the right side to the left side in the drawing. The TOC component contained in the washing water floats on the water surface, is collected by the moving feed plate 42, and is continuously carried to the scum pocket 8.
[0057]
On the other hand, the metal hydroxide that has settled down to the bottom of the settling tank 6 is scraped up by the feed plate 42 and carried to the slurry outlet. Thereby, it becomes possible to effectively recover the surfaced TOC component and the deposited metal hydroxide.
[0058]
Thus, in this Embodiment, the TOC component which floated on the water surface and the metal hydroxide deposited on the bottom part can be effectively collect | recovered by moving the feed plate 42 of the transfer apparatus 37 continuously.
[0059]
(Sixth embodiment)
A sixth embodiment of the present invention will be described with reference to FIG. The water treatment apparatus has an inlet valve 43 and an inlet valve 44 in each inlet path of the settling tank 6. Furthermore, a turbidimeter 45 for detecting the turbidity of the treated water and a control device 46 for controlling the opening and closing of the inlet valves 43 and 44 are provided at the outlet path of the settling tank 6. Other configurations are the same as those in the first embodiment.
[0060]
This embodiment has the above-described configuration, and can obtain a desirable function similar to that of the first embodiment. In particular, in the present embodiment, the turbidity of the treated water is monitored in the outlet path of the settling tank 6 and the residence time of the washing water in the settling tank 6 is changed. When treated water flows from the settling tank 6 to the outlet path, a part of the treated water is guided to the turbidimeter 45, and turbidity is detected.
[0061]
The turbidity signal is input to the control device 46, and a command is given to the inlet valves 43 and 44 based on this signal. That is, when the solid content in the treated water is large, the inlet valves 43 and 44 are closed so as to reduce the wash water flowing into the settled monk 6, and when the solid content is small, the wash water flowing into the settled monk 6 is removed. Inlet valves 43 and 44 are opened to increase. Thereby, a residence time can be changed according to the turbidity of treated water, and a TOC component and a metal hydroxide can be separated.
[0062]
Thus, in this Embodiment, the retention time of the washing water in the precipitation layer 6 can be changed according to the turbidity of treated water, and the separation function of a TOC component and a metal hydroxide can be improved.
[0063]
(Seventh embodiment)
A seventh embodiment of the present invention will be described with reference to FIG. The water treatment apparatus includes a turbidimeter 47 in the outlet path of the aeration tank 7. Moreover, it has the control apparatus 48 which adjusts the air quantity supplied from the bubble generator 9. FIG.
[0064]
This embodiment has the above-described configuration, and can obtain a desirable function similar to that of the first embodiment. In particular, in the present embodiment, the turbidity of the treated water is monitored in the outlet path of the aeration tank 7 to change the bubbles in the aeration tank 7. When treated water flows from the aeration tank 7 to the outlet path, a part of the treated water is guided to the turbidimeter 47, and turbidity is detected.
[0065]
The turbidity signal is given to the control device 48, and a command is given to the bubble generator 9 based on this. That is, when the solid content in the treated water is large, the amount of air from the foam generator 9 is increased and supplied, and when the solid content is small, the amount of air from the foam generator 9 is decreased and supplied. Thereby, the bubble in the aeration tank 7 can be changed according to the turbidity of treated water.
[0066]
Thus, in the present embodiment, the bubbles in the aeration tank 7 can be changed according to the turbidity of the treated water, and the dust separation function can be further improved.
[0067]
(Eighth embodiment)
An eighth embodiment of the present invention will be described with reference to FIG. The water treatment apparatus includes a precipitation treatment tank 49. The sedimentation tank 49 is composed of a sedimentation part 50 and a dust treatment part 51. The sedimentation unit 50 receives the wash water from the storage tank 1 and separates the TOC component and the metal hydroxide. The dust processing unit 51 treats dust suspended in water by attaching it to bubbles. The dust processing unit 51 has an aeration nozzle 52 that sends air into the water. The dust processing unit 51 includes a dust discharge pocket 53.
[0068]
This embodiment has the above-described configuration, and can obtain a desirable function similar to that of the first embodiment. The washing water from the storage tank 1 is sent to the sedimentation section 50, and the TOC component having a small specific gravity floats on the water surface, while the metal hydroxide having a large specific gravity settles at the bottom of the sedimentation section 50. The TOC component rides on the flow of water, collects in the scum pocket 8, and is sent to the dust receiving tank 12. Further, the metal hydroxide is sent to the slurry receiving tank 11.
[0069]
On the other hand, bubbles are released from the aeration nozzle 52 at the bottom of the dust processing unit 51 and rise toward the water surface. At this time, dust floating in the water adheres to the surface of the bubble and is carried to the water surface. The dust rides on the flow of water, reaches the dust discharge pocket 53, and is then sent to the dust receiving tank 12.
[0070]
As described above, in the present embodiment, it becomes possible to separate any of the metal hydroxide, the TOC component, and the dust in the precipitation treatment tank 49, as compared with those in which separation of these components is performed by individual devices. The water treatment apparatus can be configured simply.
[0071]
【The invention's effect】
According to the present invention, a metal hydroxide, dust, TOC component, and salt contained in cleaning water discharged from a wet gas cleaning device can be individually separated, and can be reused as industrial raw materials. Can be recovered. In addition, the amount of waste discharged outside the system can be greatly reduced. Furthermore, it becomes possible to remove impurities in the washing water almost completely, and it is possible to supply clean washing water.
[Brief description of the drawings]
FIG. 1 is a system diagram showing a first embodiment of a water treatment apparatus according to the present invention.
FIG. 2 is a system diagram showing a second embodiment of the water treatment apparatus according to the present invention.
FIG. 3 is a system diagram showing a third embodiment of the water treatment apparatus according to the present invention.
FIG. 4 is a configuration diagram showing a fourth embodiment of a water treatment apparatus according to the present invention.
FIG. 5 is a configuration diagram showing a fifth embodiment of a water treatment apparatus according to the present invention.
FIG. 6 is a system diagram showing a sixth embodiment of the water treatment apparatus according to the present invention.
FIG. 7 is a system diagram showing a seventh embodiment of the water treatment apparatus according to the present invention.
FIG. 8 is a system diagram showing an eighth embodiment of a water treatment device according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Storage tank 6 Precipitation tank 7 Aeration tank 11 Slurry receiving tank 12 Dust receiving tank 16, 16a, 16b Dehydration apparatus 20 1st filtration apparatus 22 2nd filtration apparatus 28 pH meter 37 Transfer apparatus 45, 47 Turbidimeter 49 Precipitation processing tank

Claims (3)

The cleaning water discharged from the wet gas cleaning device is stored, the storage tank that adjusts the pH of the cleaning water to an appropriate range in which metal hydroxide can be obtained, and the cleaning water from this storage tank is received and stored, and the cleaning water Squeezing the mixture of the precipitation layer separating the metal hydroxide and the total organic carbon component contained in the slurry, the metal hydroxide discharged from the precipitation tank and the total organic carbon component, to remove moisture, In a water treatment device for a waste treatment device comprising a dehydration device that produces dry solids ,
A first settling tank and a second settling tank, wherein the settling tank is separated from each other by a partition member;
An inlet valve for supplying wash water individually to the first sedimentation tank and the second sedimentation tank;
A water treatment apparatus for a waste treatment apparatus, comprising: an outlet valve for discharging treated water individually from the first sedimentation tank and the second sedimentation tank. The cleaning water discharged from the wet gas cleaning device is stored, the storage tank that adjusts the pH of the cleaning water to an appropriate range in which metal hydroxide can be obtained, and the cleaning water from this storage tank is received and stored, and the cleaning water Squeezing the mixture of the precipitation layer separating the metal hydroxide and the total organic carbon component contained in the slurry, the metal hydroxide discharged from the precipitation tank and the total organic carbon component, to remove moisture, In a water treatment device for a waste treatment device comprising a dehydration device that produces dry solids ,
A first settling tank and a second settling tank in which the settling tanks are separated from each other;
An inlet valve for supplying wash water individually to the first sedimentation tank and the second sedimentation tank;
A turbidimeter for detecting the turbidity of the treated water flowing through the treated water discharge path of the settling tank;
And a controller for outputting a command for controlling opening and closing of the inlet valve of the first sedimentation tank and the inlet valve of the second sedimentation tank based on a turbidity signal from the turbidimeter. Water treatment equipment for treatment equipment. The cleaning water discharged from the wet gas cleaning device is stored, the storage tank that adjusts the pH of the cleaning water to an appropriate range in which metal hydroxide can be obtained, and the cleaning water from this storage tank is received and stored, and the cleaning water Squeezing the mixture of the precipitation layer separating the metal hydroxide and the total organic carbon component contained in the slurry, the metal hydroxide discharged from the precipitation tank and the total organic carbon component, to remove moisture, In a water treatment device for a waste treatment device comprising a dehydration device that produces dry solids ,
A treated water tank for collecting treated water discharged from the dehydrator;
A filtration device for filtering treated water from the treated water tank;
It has a water purification tank that collects clean water discharged from this filtration device,
A water treatment device for a waste treatment device, wherein the filtration device comprises a first filtration device that filters solids with a filter made of a hollow fiber and a second filtration device that performs filtration treatment with a reverse osmosis membrane.

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