JP2007237939A - Wastewater treatment vessel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wastewater treatment vessel capable of carrying out efficient wastewater treatment by reducing cost and time required for wastewater treatment work by collecting, purifying and treating wastewater produced by using a hydroblast machine and oil contaminated wastewater discharged from a marine vessel. <P>SOLUTION: A wastewater purifying means is furnished with a wastewater collecting means 21 to collect the wastewater produced by using a grinding and sweeping means 20, a collection tank 11 to store the wastewater collected by the wastewater collecting means 21, a separation treatment tank 12 having separating solidifying means 25, 26 to store the wastewater of an upper layer part naturally separated and floated, to separate pollutant matters from water out of the wastewater stored in the collection tank 11, filtering means 31, 34, 37 to refine the purified wastewater by reducing the turbidity of the wastewater separated from the pollutant matters in the separation treatment tank 12 through a filter and purified wastewater storage tanks 16, 17 to store the purified wastewater filtered by the filtering means. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wastewater treatment ship that collects and purifies polluted wastewater generated by using a hydroblasting machine and oil-containing wastewater discharged from a ship.

Various types of wastewater are generated from marine vessels. For this reason, it is necessary to perform treatment suitable for the kind of those wastewaters.
For example, when cleaning the hull, a hydroblast machine (see Patent Document 1) that sprays high-pressure water on the hull surface and removes unnecessary paint and dirt is used. Since the waste water generated by using this hydroblasting machine contains exfoliation and dirt from the hull surface as contaminants, it is necessary to perform a purification process to reduce the contaminants.

In addition, in a ship, bilge water, water ballast, tank ship purified water, and the like that collect on the bottom of the ship are discharged, and these contain oil. That is, the oil-containing wastewater discharged from the ship needs to be purified so as to reduce the oil content.
Conventionally, these wastewaters are collected from the ship by a wastewater recovery ship and / or a wastewater recovery vehicle and transported to an appropriate purification treatment facility.
JP 2002-143611 A

However, when wastewater is transported to a purification treatment facility by a wastewater collection ship and / or a wastewater collection vehicle as in the prior art and the purification treatment is performed there, there is a problem that a lot of cost and time are required for the work process.
In particular, when different types of wastewater are treated as described above, a wastewater recovery ship and / or a wastewater recovery vehicle corresponding to each type and a purification facility are required, and a large amount of cost is required for each type of wastewater. Was.
That is, in the present situation, it cannot be said that an efficient wastewater treatment environment for wastewater generated in a ship is provided.

  The present invention has been made under the circumstances as described above, and recovers and purifies waste water generated by using a hydroblasting machine or oil-containing waste water discharged from a ship, and thereby costs for waste water treatment work. The purpose is to provide a wastewater treatment ship capable of reducing waste time and performing efficient wastewater treatment.

  In order to solve the above-mentioned problems, a wastewater treatment ship according to the present invention includes a hull that can be navigated by towing or self-propelled, and a researcher that injects high-pressure water onto an object to be cleaned that is mounted on the hull or prepared separately. A wastewater treatment ship provided with a sweeping means and a wastewater purification means that is provided in the hull and collects and purifies wastewater generated by use of the scouring means, wherein the wastewater purification means includes the scouring means Waste water recovery means for recovering waste water generated by the use of the waste water, a recovery tank for storing the waste water recovered by the waste water recovery means, and the waste water of the upper layer that naturally separated and floated out of the waste water stored in the recovery tank. A separation processing tank having separation and coagulation means for separating and coagulating the contaminants from moisture and containing the wastewater separated from the contaminants in the separation processing tank through a filter to reduce turbidity and purified wastewater A filtering means for purifying, to be provided with a purifying pre wastewater storage tank for accommodating the cleaning already wastewater has been filtered by the filtering means has a characteristic.

With such a configuration, waste water generated by using the scouring means can be immediately purified by the waste water purification means.
Therefore, the work process using the waste water recovery ship and / or the waste water recovery vehicle and the waste water treatment facility as in the past becomes unnecessary, and the cost and time for waste water treatment can be reduced as compared with the conventional case.

The separation and solidification means includes a flocculant that separates and solidifies the contaminants from water, a drug inlet for injecting the flocculant into the wastewater, and a stirrer for stirring the flocculant in the wastewater. It is preferable.
In this way, by using the flocculant to separate and solidify the contaminants from the water, the purification treatment can be performed effectively.

In addition, turbidity inspection means for measuring the turbidity of the purified wastewater stored in the purified wastewater storage tank, the purified wastewater having a turbidity measured by the turbidity inspection means within a predetermined value, It is desirable to be reused by scouring means.
The purified wastewater whose turbidity measured by the turbidity inspection means is higher than a predetermined value is further reduced by the filtration means and stored in the purified wastewater storage tank, and is regenerated by the turbidity inspection means. If the measured turbidity is within a predetermined value, it is preferably reused by the scouring means.
Thus, since the purified waste water can be reused in the scouring means if it meets a predetermined water quality level after a predetermined water quality test, the cost for the scouring work water can be reduced.

  The waste water purification means includes an oil-containing waste water collecting means for collecting oil-containing waste water generated in another ship or oil-containing waste water that has flowed out to the sea, and an oil-containing waste water stored in the recovery tank. Contains oil collecting means for collecting the oil content, oil-water separating means for separating oil-containing wastewater collected by the oil-collecting means into oil and oil-containing water, and oil separated by the oil-water separating means The oil-containing moisture separated by the oil / water separation means is reduced to the oil remaining by the filtering means to be purified wastewater, and is stored in the purified wastewater storage tank. desirable.

In this way, the waste water purification means includes means for purifying the oil-containing waste water in addition to the means for treating the waste water generated by the use of the scouring means. In contrast, it can be immediately recovered and purified by wastewater purification means.
Therefore, the work process using the oil-containing wastewater recovery ship and / or the oil-containing wastewater recovery vehicle and the oil-containing wastewater treatment facility as in the past becomes unnecessary, and the cost and time required for the oil-containing wastewater treatment can be reduced as compared with the prior art.
In addition, since equipment such as a recovery tank and a filtering means can be used for the treatment of waste water generated by the use of the scouring means, the cost on the equipment can be reduced.

In addition, it comprises an oil content inspection means for measuring the oil content rate of the purified waste water stored in the purified waste water storage tank, and the purified waste water whose oil content rate measured by the oil content inspection means is within a predetermined value is discharged to the sea. It is desirable that
If comprised in this way, it can be discriminate | determined on the spot whether the purified waste water can be returned to the sea.

Purified wastewater whose oil content measured by the oil content inspection means is higher than a predetermined value is further reduced in oil content by the filtering means and stored in the purified wastewater storage tank, and remeasured by the oil content inspection means. If the oil content is within a predetermined value, it is desirable to be discharged to the sea.
If comprised in this way, it can purify | clean-up until it becomes a state which can reduce wastewater to the sea.

  According to the present invention, wastewater generated by using a hydroblasting machine and oil-containing wastewater discharged from a ship are recovered and purified, thereby reducing the cost and time required for wastewater treatment work and performing efficient wastewater treatment. A wastewater treatment ship that can be used can be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, as a first embodiment of a wastewater treatment ship according to the present invention, a form of a wastewater treatment ship that collects and purifies sludge wastewater generated by using a hydroblast machine will be described. FIG. 1 is a cross-sectional view of a wastewater treatment ship according to the first embodiment of the present invention, and FIG. 2 is a plan view of the wastewater treatment ship of FIG.

  A wastewater treatment ship 100 shown in FIG. 1 includes a flat bottom hull 1 that can be navigated by towing by another self-propelled ship or by self-propelled, and the hull 1 serves as a command room. A cabin 2 is provided. In the present embodiment, the wastewater treatment ship 100 is equipped with a hydroblast machine 20 as a scouring means, so that, for example, the hull of another ship can be scoured by high-pressure water jet using the hydroblast machine 20. Has been made. The hydroblast machine 20 is not limited to the one provided in the hull 1 but may be a separately prepared one. Further, the hydroblast machine 20 may be one machine or a plurality of machines, but in the case of a plurality of machines, they may be provided on the hull 1 or prepared separately, or they may be used in combination.

The wastewater treatment ship 100 also has wastewater purification means for collecting and purifying wastewater generated by using the hydroblast machine 20.
The waste water purification means includes a plurality of treatment tanks as shown in FIG. First, a recovery tank 11 for storing waste water generated by using the hydroblast machine 20 is provided at a substantially central position of the hull 1. On the stern side of the recovery tank 11, a separation processing tank 12, a post-filtration storage tank 13, and a post-filtration storage tank 14 for performing purification processing on the recovered wastewater in stages are provided in order. Further, a reserve tank 15 in which fresh water is stored is provided on the stern side of the post-filtration storage tank 14. The fresh water in the reserve tank 15 can be used for various uses.
Purified waste water storage tanks 16 and 17 for storing purified waste water are provided adjacent to the bow side of the recovery tank 11 in order.

The waste water purification means is a pipe that forms a recovery flow path by sucking the discharged waste water as a waste water recovery means for recovering the waste water discharged from the hydroblast machine 20 above the recovery tank 11. 21 and a metal mesh filter 22 for filtering waste water sent from the pipe 21.
That is, waste water generated by using the hydroblast machine 20 passes through the pipe 21 and is then filtered by the metal mesh filter 22 to remove relatively large release paint, dust, and the like in the waste water. The waste water is accommodated in the recovery tank 11 below after being filtered by the metal mesh filter 22.

  The waste water purification means includes a pump 23 and a pipe 24 for transferring waste water from the recovery tank 11 to the separation treatment tank 12, and a filter 60 for removing relatively large particulate contaminants in the waste water. The waste water collected in the collection tank 11 is pumped through the pipe 24 by the pump 23, filtered by the filter 60, and then stored in the separation processing tank 12.

The separation tank 12 includes separation and solidification means for separating and solidifying the exfoliated material (exfoliation paint and dirt) in the wastewater generated by the hydroblasting machine 20 from the water, and this separation and solidification means includes the exfoliated material. A coagulant that coagulates, a chemical injection port 25 for injecting the coagulant, and a stirrer 26 that stirs the waste water to promote the coagulation reaction.
The sludge deposit that solidifies and settles in the separation tank 12 and the sludge deposit that naturally settles in the recovery tank 11 are collected by the recovery vehicle 28 via the discharge line 27. ing.

  The waste water purification means includes a pump 29 and a pipe 30 for transferring the waste water of the separation treatment tank 12 to the storage tank 13 after filtration, and a sand filter 31 for filtering sludge particles as the filtration means, The waste water pumped up by the pump 29 in the pipe 30 passes through the sand filter 31 and is then sent to the storage tank 13 after filtration.

  Furthermore, a pump 32 and a pipe 33 for transferring waste water from the post-filtration storage tank 13 to the post-filtration storage tank 14 and a first precision cartridge filter 34 that can be easily replaced as filtration means are provided. The waste water pumped up by the pump 32 passes through the first precision cartridge filter 34 and is then sent to the storage tank 14 after filtration.

  In addition, the waste water purification means includes a pump 35 and a pipe 36 for transferring the waste water of the post-filtration storage tank 14 to the purified waste water storage tanks 16 and 17, and the quality of the purified waste water storage tanks 16 and 17 as filtration means. Accordingly, a second precision cartridge filter 37 that can be easily replaced is provided. That is, the waste water pumped up by the pump 35 through the pipe 39 passes through the second precision cartridge filter 37 as needed, and is sent to the purified waste water storage tanks 16 and 17.

  In addition, as shown in FIG. 2, the filtration means that is subjected to the filtration process in multiple stages by the sand filter 31, the first precision cartridge filter 34, the second cartridge filter 37, etc. is provided in two systems along the hull, Work efficiency is improved. In addition, with this configuration, even if a failure occurs in one system, the processing can be continued in the other system.

  In addition, since the purified waste water stored in the purified waste water storage tanks 16 and 17 is reused in the hydroblast machine 20, a strict purification process is required to avoid adverse effects on the equipment. For this reason, the purified wastewater storage tanks 16 and 17 are provided with a turbidity detector 38 (turbidity inspection means) for measuring the turbidity of the purified wastewater.

  Further, the purified waste water storage tanks 16 and 17 are provided with a pump 39 and pipes 40 and 41 for transferring the stored purified waste water to the hydroblast machine 20 or discharging it to the sea or the like. In other words, the purified waste water is pumped through the pipe 40 by the pump 39 and can be reused in the hydroblast machine 20. In addition, the purified waste water in the purified waste water storage tanks 16 and 17 remaining after use in the hydroblast machine 20 is discharged to the sea etc. through the pipe 41 if there is no problem after a predetermined water quality test. Has been made.

  Next, a wastewater treatment process performed by the wastewater purification means when the wastewater treatment ship 100 configured in this way, for example, cleans the hull of another ship with the hydroblast machine 20 will be described based on the flow of FIG. 3. To do.

First, the wastewater treatment ship 100 collects used wastewater from the hydroblasting machine 20 that uses the purified wastewater in the purified wastewater storage tanks 16 and 17 as washing water, and supplies it to the recovery tank 11 via the metal filter 22. Accommodates (step S1 in FIG. 3).
Here, among the wastewater stored in the recovery tank 11, exfoliated material having a high specific gravity settles to the lower layer, so that the wastewater in the upper layer passes through the pipe 24 and is sent to the separation processing tank 12 through the filter 60 ( Step S2 in FIG.

In the separation processing tank 12, a flocculant is injected from the chemical injection port 25, and contaminants (peeled matter, dirt, etc.) in the wastewater are separated from water and solidified (step S3 in FIG. 3). The solidified contaminants settle to become sludge deposits and are later recovered by the recovery vehicle 28. Further, in the tank 12, the processing liquid is stirred by the stirrer 26, and the coagulation reaction is promoted.
Since the wastewater separated from the pollutants in the separation treatment tank 12 is mixed with a considerable number of sludge particles, these are removed through the sand filter 31 and then sent to the storage tank 13 after filtration (FIG. 3 step S4).

Next, the waste water in the storage tank 13 after filtration is purified by the first precision cartridge filter 34 so as to further reduce turbidity, and is sent to the storage tank 14 after filtration (step S5 in FIG. 3).
Waste water in the storage tank 14 after filtration is sent to the purified waste water storage tanks 16 and 17 through the pipe 36 (step S6 in FIG. 3), where the turbidity detector 38 measures the turbidity, A water quality level inspection is performed (step S7 in FIG. 3).

  In the water level inspection by the turbidity detector 38, when the measured turbidity is lower than a predetermined value and reaches a predetermined water quality level, the purified wastewater in the purified wastewater storage tanks 16 and 17 is The purified waste water that is reused by the hydroblast machine 20 (step S8 in FIG. 3) and remains in the tank after its use is discharged to the sea or the like after a predetermined inspection if there is no problem (step S9 in FIG. 3). ).

On the other hand, when the measured turbidity is higher than a predetermined value and does not satisfy a predetermined water quality level, purification is performed until the predetermined water quality level is satisfied by performing a filtration process using a precision cartridge filter (not shown) as a filtering means. This is done (step S10 in FIG. 3).
Further, when the first precision cartridge filter 34 alone does not purify the water level to a predetermined level, the second precision cartridge is used when transferring waste water from the post-filtration storage tank 14 to the purified waste water storage tanks 16 and 17. It is preferable that the filter 37 is further filtered.

As described above, according to the first embodiment of the present invention, the waste water treatment ship 100 is provided with the waste water purification means for treating the waste water in the hull 1, so that the hydroblasting machine that is the scouring means The waste water generated by using 20 can be immediately purified by the waste water purification means.
Therefore, the work process using the waste water recovery ship and / or the waste water recovery vehicle and the waste water treatment facility as in the past becomes unnecessary, and the cost and time for waste water treatment can be reduced as compared with the conventional case.
Moreover, since the purified wastewater can be reused in the hydroblast machine 20 after a predetermined water quality test on the spot and satisfying a predetermined water quality level, the cost for the scouring work water can be reduced.

  Next, as a second embodiment of the wastewater treatment ship according to the present invention, a wastewater treatment ship capable of purifying oil-containing wastewater discharged from a ship in addition to the function in the first embodiment. A form is demonstrated. FIG. 4 is a sectional view of a wastewater treatment ship according to the second embodiment of the present invention. In FIG. 4 and the following description, the same components as those described in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

The waste water treatment ship 101 shown in FIG. 4 further includes the following means in addition to the structure shown in FIG. 1 as waste water purification means in order to treat oil-containing waste water.
First, a recovery line 44 for recovering oil-containing wastewater such as bilge water, water ballast, and tank wash water discharged from other ships to the recovery tank 11 is provided as oil-containing wastewater recovery means. The recovery line 44 includes a flash point tester 45 for measuring the flash point of the oil-containing wastewater to be recovered, a flow meter 46 for measuring the recovery amount, and a filter 47 for collecting relatively large dust and the like. Is provided.

  In addition, the pump 61 and the pipe 49 for sucking up the lower oil-containing wastewater in the recovery tank 11 as the oil collecting means, the skimmer 48 and the pipe 51 for sucking up the waste oil naturally separated and floated in the upper layer, and the pipe 49 are sucked up. And an oil-water separator 50 as oil-water separation means for separating the oil-containing waste water into waste oil and waste water. A pipe 51 is connected to the oil / water separator 50 in order to discharge the separated waste oil, and the waste oil discharged to the pipe 51 is stored in a waste oil storage tank 42 provided on the stern side. A pipe 56 for discharging the separated waste water is connected to the oil / water separator 50, and a filter 55 is provided on the pipe 56. The waste water filtered by the filter 55 is further filtered by the sand filter 31 and stored in the storage tank 13 after filtration.

Further, a skimmer 57 and a pipe 58 are provided for sucking up the oil floating on the surface of the waste water stored in the storage tank 13 after filtration, and the sucked waste oil is stored in the waste oil storage tank 42 through the pipe 58. Has been made.
The waste oil stored in the waste oil storage tank 42 is recovered by a waste oil recovery vehicle 54 by a pump 52 and a discharge line 53.

The waste water stored in the post-filtration storage tank 13 is stored in the post-filtration storage tank 14 via the first precision cartridge filter 34 and further stored in the purified waste water storage tank 17 via the second precision cartridge filter 37. It is made to be done.
The purified wastewater storage tank 17 is provided with an oil content detector 59 as oil content inspection means. The oil content detector 59 measures the values of oil content, COD and pH, and the oil content within a predetermined range, COD. And the pH is checked.
As shown in the figure, in the hull 1, a spare tank 43 in which fresh water is stored is provided on the bow side of the recovery tank 11. The fresh water in the reserve tank 43 can be used for various uses.

Next, a wastewater treatment process in the case where the wastewater treatment ship 101 configured as described above purifies oil-containing wastewater collected from other ships, for example, will be described based on the flow of FIG.
First, oil-containing wastewater such as bilge water, water ballast, and tank washing water discharged from another ship is collected in the collection tank 11 by the collection line 44 (step S11 in FIG. 5).
At the time of recovery, the flash point of the oil-containing wastewater to be recovered is measured for safety by the flash point tester 45, and the recovery amount is measured by the flow meter 46. When safety is confirmed, relatively large dust is collected by the filter 47 and the oil-containing wastewater is recovered in the recovery tank 11.

In the recovery tank 11, sludge, dust, etc. having a large specific gravity are precipitated, and the oil component naturally floats in the upper layer portion. Therefore, waste oil near the surface is sucked up by the skimmer 48 and sent to the waste oil storage tank 42. On the other hand, the oil-containing wastewater in the lower layer portion of the recovery tank 11 is pumped by the pump 61 and sent to the oil separator 50 (step S12 in FIG. 5).
The oil / water separator 50 separates the oil-containing waste water into oil (waste oil) and moisture (waste water), sends the waste oil to the waste oil storage tank 42, and sends the waste water to the storage tank 13 after filtration (step S13 in FIG. 5). . Here, since the waste water separated by the oil / water separator 50 still contains a lot of oil, the oil is further removed by the filter 55 and the sand filter 31 and then stored in the storage tank 13 after filtration.

  Since the wastewater stored in the storage tank 13 after filtration has not been completely removed, the oil floating near the surface of the wastewater in the tank is sucked up by the skimmer 57 and sent to the waste oil storage tank 42 (step of FIG. 5). S14). The waste oil stored in the waste oil storage tank 42 is recovered by the waste oil recovery vehicle 54 via the discharge line 53.

Next, the waste water stored in the post-filtration storage tank 13 is stored in the post-filtration storage tank 14 via the first precision cartridge filter 34 and further purified via the second precision cartridge filter 37 in order to further exclude oil. It is stored in the spent wastewater storage tank 17 (step S15 in FIG. 5).
In the purified wastewater storage tank 17, the oil content detector 59 measures the oil content, COD, and pH, and checks whether the oil content is within a predetermined range (step S16 in FIG. 5). If it is within, it is discharged to the sea (step S18 in FIG. 5).

  On the other hand, if the oil content detector 59 contains more than a predetermined amount of oil, the oil content is filtered by a precision cartridge filter (not shown) as a filtering means until the oil content falls within the predetermined amount. It is reduced (step S17 in FIG. 5).

As described above, according to the second embodiment of the present invention, the wastewater purification means included in the wastewater treatment ship 101 is for purifying oil-containing wastewater in addition to the configuration shown in the first embodiment. The means is provided. That is, it is possible to handle different types of wastewater with one ship.
Therefore, according to the wastewater treatment ship 101, for example, oil-containing wastewater discharged from other ships or the like can be immediately recovered and purified by the wastewater purification means. Thereby, the work process using an oil-containing wastewater collection ship and / or an oil-containing wastewater collection vehicle and an oil-containing wastewater treatment facility as in the past becomes unnecessary, and the cost and time required for oil-containing wastewater treatment can be reduced as compared with the conventional case.
Moreover, since facilities, such as the collection tank 11 and a filtration means, can be combined with the process of the wastewater produced by use of the hydroblast machine 20, the cost on an installation can be reduced.

  The present invention relates to a wastewater treatment ship that collects and purifies polluted wastewater generated by use of a hydroblasting machine, oil-containing wastewater generated by other ships, and the like, and can be suitably used in the industrial waste treatment industry.

FIG. 1 is a sectional view of a wastewater treatment ship according to the first embodiment of the present invention. FIG. 2 is a plan view of the wastewater treatment ship of FIG. FIG. 3 is a flowchart showing the flow of the treatment process by the waste water purification means provided in the waste water treatment ship of FIG. FIG. 4 is a sectional view of a wastewater treatment ship according to the second embodiment of the present invention. FIG. 5 is a flowchart showing the flow of the treatment process by the waste water purification means provided in the waste water treatment ship of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hull 2 Cabin 11 Recovery tank 12 Separation processing tank 13, 14 Storage tank after filtration 15 Spare tank 16, 17 Purified waste water storage tank 20 Hydroblast machine (scouring means)
21 Pipe (waste water recovery means)
22 Metal mesh filter (waste water recovery means)
25 Drug injection (separation coagulation means)
26 Stirrer (separation and solidification means)
31 Sand filter (filtering means)
34 First precision cartridge filter (filtering means)
37 Second precision cartridge filter (filtering means)
38 Turbidity detector (turbidity inspection means)
42 Waste oil storage tank 44 Recovery line (oil-containing wastewater recovery means)
48 Skimmer (Oil collecting means)
49 Pipe (oil collecting means)
50 Oil-water separator (oil-water separator)
59 Oil detector (oil inspection means)
100, 101 Wastewater treatment ship

Claims (7)

A hull capable of navigating by towing or self-propelled, a scouring means for injecting high-pressure water onto a scouring object, which is mounted on the hull or separately, and provided by the hull, and is generated by the use of the scouring means. A wastewater treatment ship comprising wastewater purification means for collecting and purifying the wastewater,
The waste water purification means includes
Waste water recovery means for recovering waste water generated by use of the scouring means, a recovery tank for storing waste water recovered by the waste water recovery means, and an upper layer that naturally separated and floated out of the waste water stored in the recovery tank The waste water separated from the pollutant in the separation treatment tank is passed through a filter to reduce turbidity and purified. A wastewater treatment ship comprising a filtering means for purifying wastewater and a purified wastewater storage tank for storing purified wastewater filtered by the filtering means.   The separation and solidification means includes a flocculant that separates and solidifies the contaminants from water, a drug inlet for injecting the flocculant into waste water, and a stirrer for stirring the flocculant in waste water. The wastewater treatment ship according to claim 1, wherein the ship is a wastewater treatment ship. Comprising turbidity inspection means for measuring the turbidity of purified wastewater stored in the purified wastewater storage tank;
The wastewater treatment ship according to claim 1 or 2, wherein the purified wastewater whose turbidity measured by the turbidity inspection means is within a predetermined value is reused by the blasting means.   Purified wastewater whose turbidity measured by the turbidity inspection means is higher than a predetermined value is further reduced by the filtration means and stored in the purified wastewater storage tank, and is remeasured by the turbidity inspection means. 4. The wastewater treatment ship according to claim 3, wherein if the turbidity is within a predetermined value, it is reused by the scouring means. The waste water purification means includes
Oil-containing wastewater recovery means for recovering oil-containing wastewater generated in other ships or oil-containing wastewater that has flowed out to sea A collecting means, an oil / water separation means for separating the oil-containing wastewater collected by the oil-part collection means into oil and oil-containing water, and a waste oil storage tank for containing the oil separated by the oil-water separation means. ,
The oil-containing moisture separated by the oil / water separation means is reduced to oil remaining by the filtration means to be purified wastewater, and is stored in the purified wastewater storage tank. The wastewater treatment ship described in any one of 4 above. Oil content inspection means for measuring the oil content of the purified wastewater stored in the purified wastewater storage tank,
6. The wastewater treatment ship according to claim 5, wherein the purified wastewater whose oil content measured by the oil content inspection means is within a predetermined value is discharged to the sea.   The purified wastewater whose oil content measured by the oil content inspection means is higher than a predetermined value is further reduced by the filtration means and stored in the purified wastewater storage tank, and the oil content remeasured by the oil content inspection means. The wastewater treatment ship according to claim 6, wherein the wastewater treatment ship is discharged to the sea if the content rate is within a predetermined value.

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