JP2002186956A - Wastewater treatment system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wastewater treatment system capable of preventing a condition that an equipment can not be used when a water quality of a treated water from a wastewater treatment equipment temporarily deteriorates. SOLUTION: This system is provided with a wastewater treatment equipment 3 performing the purification treatment of a wastewater, a water quality detection means (an SS concentration detecting equipment 37) detecting the water quality of the treated water treated in the equipment 3, a re-treatment section (a sedimentation and separation equipment 5) re-treating the treated water treated in the equipment 3, a changeover means (a changeover valve 4) changing over the discharge of the treated water from the equipment 3 either to an outlet of a sewerage, or the like, or to the re-treatment section, and a controlling means (a controlling equipment 7) changing a wastewater channel from the equipment 3 from a discharge outlet of the sewerage, or the like, to the re-treatment section by controlling the changeover means when an error of the water quality is detected based on an effective value of the water quality obtained by using the water quality detecting means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wastewater treatment system provided with a wastewater treatment apparatus for purifying wastewater such as garbage and domestic wastewater crushed by a disposer.

[0002]

2. Description of the Related Art An example of this type of wastewater treatment system is disclosed in Japanese Patent Application Laid-Open No. H10-15524 (B09B 3/0
0).

The above-mentioned publication discloses a disposer for pulverizing kitchen garbage (garbage) and a secondary treatment apparatus for processing water to be treated including crushed kitchen garbage crushed by the disposer so as to have a specified water quality. (A wastewater treatment apparatus), a detection means for detecting whether or not the operation of the secondary treatment apparatus is normally executed, and a detection result of the detection means is negative. Executing means for executing predetermined processing on the disposer.

According to the above publication, the detecting means detects whether or not the operation of the secondary processing device is normally performed by detecting the water quality of wastewater from the secondary processing device. It is described what to do.

[0005] The disposer further includes a notifying unit for notifying whether or not a series of operations is normally executed,
It is described that the execution unit notifies the notification unit that a series of operations are not normally executed when the detection result of the detection unit is negative.

[0006]

By the way, when a large amount of domestic wastewater is flushed immediately after pulverizing a large amount of garbage with a disposer, the water quality of the wastewater from a wastewater treatment device for treating the garbage-containing wastewater is reduced. It is conceivable that a situation where the predetermined value is temporarily exceeded may occur.

However, according to the above publication, when the water quality from a wastewater treatment device (secondary treatment device) exceeds a predetermined value, it is determined that the device is not normally executed and used. It may be impossible to do so.

[0008] That is, since domestic wastewater is left to the user, there is a possibility that a large amount of wastewater will flow in temporarily. Judging by water quality,
Anomalous judgment may occur frequently and cause inconvenience to the user. In addition, even if a large amount of wastewater flows in temporarily, in order to prevent the water quality from temporarily deteriorating, the capacity of the wastewater treatment equipment must have a large margin, resulting in excessive performance. I will.

[0009] On the other hand, regarding the notification when an abnormality actually occurs due to a failure of the apparatus, the user does not notice the abnormality of the apparatus unless the user confirms the display of the abnormality on the display unit. May fall into a catastrophic state, resulting in the device being unusable for a long period of time.

Therefore, the present invention has been made to solve such a problem, and it is possible to prevent the apparatus from being unable to be used due to the temporary deterioration of the quality of the treated water from the wastewater treatment apparatus. It is an object of the present invention to provide a wastewater treatment system that can be used.

It is another object of the present invention to provide a wastewater treatment system capable of receiving prompt repairs by a maintenance company even when an abnormality actually occurs due to a device failure or the like.

[0012]

In order to achieve the above object, the present invention provides a wastewater treatment apparatus for purifying wastewater, and a water quality for detecting the quality of treated water treated by the wastewater treatment apparatus. Detecting means, a reprocessing unit for reprocessing the treated water treated by the wastewater treatment device, and whether to discharge the treated water from the wastewater treatment device to a discharge destination such as sewage or to the reprocessing unit. Switching means for switching, and when a water quality abnormality is detected based on the effective value of water quality obtained using the water quality detection means, controls the switching means to change the drainage flow path from the wastewater treatment device to sewage or the like. Control means for switching from the discharge destination to the reprocessing unit.

[0013] Further, a wastewater treatment device for purifying wastewater containing crushed food waste crushed by the crushing means, a water quality detection means for detecting the quality of the treated water treated by the wastewater treatment device, and the crushing means When a water quality abnormality is detected based on the effective value of the water quality obtained by using the switching means for switching whether to discharge the wastewater from the wastewater treatment apparatus to the discharge destination such as sewage or the like, and the water quality detection means. And control means for prohibiting use of the crushing means and / or controlling the switching means to switch a drain passage from the crushing means to a discharge destination of sewage or the like without passing through the wastewater treatment device. It is characterized by the following.

Further, the water quality detecting means includes an SS concentration detecting device for detecting an SS concentration in the treated water from the wastewater treatment device, and the control means includes an SS concentration obtained by using the SS concentration detecting device. When the effective value exceeds the set value, the switching means is controlled to switch the drainage flow path from the wastewater treatment device from the discharge destination of sewage or the like to the reprocessing unit. .

[0015] Further, as the water quality detecting means, there is provided an SS concentration detecting device for detecting an SS concentration in the treated water from the wastewater treatment device, and the control means includes an SS concentration detecting device obtained by using the SS concentration detecting device. If the effective value exceeds the set value, the use of the crushing unit is prohibited and / or the switching unit is controlled to control the drainage flow path from the crushing unit to drain water or the like without passing through the wastewater treatment device. It is characterized by switching to the discharge destination.

[0016] Further, the control means, when the water quality abnormality is detected not based on a temporary value but on a plurality of times with respect to the effective value of the water quality obtained by using the water quality detecting means, the switching means. And switches the drainage flow path from the wastewater treatment device from a destination such as sewage to the reprocessing unit.

[0017] The control means may further comprise, when an abnormal water quality is detected based on a plurality of effective values of the water quality obtained by using the water quality detecting means, instead of the temporary values, the crushing means. And / or controlling the switching means to switch the drainage flow path from the crushing means to a discharge destination of sewage or the like without passing through the wastewater treatment device.

Further, the reprocessing section is provided with solid-liquid separation means for separating a solid component and a liquid component.

The solid-liquid separation means is provided with a precipitation separation device.

[0020] On the other hand, a filter is provided as the solid-liquid separating means.

Further, the control means, when an abnormality in the quality of the treated water treated by the wastewater treatment device is detected,
This is characterized by notifying the user and / or notifying the maintenance company.

[0022]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a system configuration diagram showing the overall configuration of a disposer wastewater treatment system as one embodiment of the present invention.

In this disposer wastewater treatment system, wastewater containing crushed garbage from a disposer 1 provided below a sink of a sink and ordinary domestic wastewater except when the disposer 1 is used are treated through a pipe 2. It is configured to flow into the device 3.

On the side of the wastewater treatment device 3, the wastewater flowing through the pipe 2 is temporarily stored in the flow control tank 31, and the sediment is transferred to the solid-liquid separation device 32 by the air lift pump 311 together with the liquid, and the solid is separated. The separated solid component is put into a composting (composting) device 33 to be composted by an organic matter decomposition treatment by microorganisms.

The separated liquid is put into a treatment tank 34 and an organic component is decomposed by microorganisms by aeration treatment. Then, the treated water treated in the treatment tank 34 is allowed to flow naturally into the sedimentation separation tank 35 whose upper part communicates with the communication pipe 341 to precipitate excess floc sludge, and the supernatant thereof flows through the drain pipe 36 due to overflow. The sludge discharged and settled out of the wastewater treatment device 3 is returned to the first-stage flow control tank 31 by the air lift pump 351.

The air lift pump is a pump that blows air into a pipe inserted into water, lifts and transfers water and solids by the rising force of the air, and includes an air lift pipe and a blower pump. Consisting of
The blower pump can be shared by switching using a multi-way valve or the like.

The processing tank 34 has a diffuser 3 at its bottom.
42, and a blower 343 for supplying air to the air diffuser 342 is provided. Further, a carrier 344 in which aerobic microorganisms that decompose organic substances inhabit is contained in the treatment tank 34. The liquid component charged into the processing tank 34 contains an organic substance, and the aerobic microorganisms inhabiting the carrier 344 are activated by aeration to decompose the organic substance, and the upper part is communicated with the communication pipe 341. In the sedimentation separation tank 35 of the next stage, it is easy to settle as surplus sludge.

The sedimentation separation tank 35 is provided with a coagulant charging device 352 for charging a coagulant for accelerating the settling of sludge. In addition, in the upper part of the sedimentation separation tank 35,
A partition plate 353 is provided to prevent the treated water containing flocs from flowing from the treatment tank 34 when the water is full, from being drained directly from the drain pipe 36.

In this embodiment, a drain pipe 36 from the sedimentation / separation tank 35 is connected to a sedimentation / separation apparatus 5 and a drainage pipe 6 for sewage through a switching valve (three-way valve) 4. Switching between discharging the treated water from the wastewater treatment device 3 to the sewage and discharging to the sedimentation / separation device 5 can be controlled.

In the sedimentation / separation device 5, partition plates 51, 52, 53 for preventing the sediment and the supernatant liquid from being stirred by the inflow water are formed. An air lift pump 54 for returning the liquid to the flow control tank 31 is provided, and the supernatant is discharged to the sewage by overflow.

The drain pipe 3 from the sedimentation separation tank 35
6 is provided with an SS concentration detecting device 37 which comprises a light emitting element 371 and a light receiving element 372 and detects the SS (suspended substance) concentration in the treated water from the wastewater treatment device 3.

The detection output of the SS concentration detector 37 is
The control device 7 controls the switching valve 4 based on the detection output of the SS concentration detecting device 37 in addition to the conventional control. Also, when the water quality is abnormal, the use of the disposer 1 can be prohibited by not accepting the input of the start switch (not shown) of the disposer 1. When the water quality is abnormal, a message to that effect is displayed on the display device 71 provided near the sink, and a signal is sent from the transmitting device 72 to the receiving device 81 on the maintenance company side via a telephone line, so that the maintenance company side receives the signal. The display device 82 is also configured to be able to display.

Now, in the above configuration, the waste water containing the crushed garbage when the disposer is used and the domestic waste water other than when the disposer is used flow into the flow control tank 31 of the waste water treatment device 3 and are subjected to the various treatments described above. Finally, it is treated in the sedimentation separation tank 35 and discharged to the outside of the wastewater treatment device 3.

The drain pipe 36 from which the treated water overflows from the sedimentation separation tank 35 is provided with the SS concentration detecting device 37 for detecting the SS concentration in the treated water as described above. Is larger than the set value, it is considered that the water quality is abnormal, and the drain valve is switched by the switching valve 4. The detection of the SS concentration will be described later.

The treated water from the wastewater treatment device 3 normally flows to the sewage, but if a water quality abnormality occurs, the switching valve 4
And the treated water (supernatant) separated into solid and liquid in the sedimentation / separation device 5 is discharged to the sewage.

The wastewater containing the sediment accumulated in the sedimentation / separation device 5 counts the time flowing to the sedimentation / separation device 5 side by the switching valve 4, and the airlift pump 54 is automatically operated at regular intervals or during maintenance. By returning the wastewater to the flow control tank 31 of the wastewater treatment apparatus 3, the wastewater is drained to sewage after normal processing is performed.

When an abnormality in water quality occurs, the control device 7 simultaneously operates the display device 7 in the user's home.
At 1, the user is notified, and a signal is transmitted from the transmitting device 72 to the receiving device 81 of the maintenance company via the telephone line, and the abnormality is displayed on the display device 82. Therefore, the abnormality of the device at the user's home is immediately notified to the maintenance company.

The detection of the SS concentration is performed as shown in FIG. That is, light projected from the light emitting element 371 constituting the SS concentration detecting device 37 is scattered by the floating substance SS, and the amount of light received by the light receiving element 372 changes. The SS concentration can be detected by detecting the amount of received light.

FIG. 3 shows an example of judging a water quality abnormality from the amount of light received by the light receiving element 372.

In FIG. 3, the amount of received light is measured at intervals of time T. The higher the value of the SS concentration, the lower the water quality and the lower the value of the amount of received light.

At time t1, the received light amount is lower than the set value. However, if it is determined that the water quality is abnormal only once, even if the SS concentration is temporarily high, it is determined that the water quality is abnormal. There is a possibility that an abnormality frequently occurs.

FIG. 3 shows a case where the amount of received light falls below the set value continuously from time t6 to time t9.
The water quality is determined to be abnormal by a plurality of (four) determinations.

The SS concentration detector 37 can be realized with a relatively simple and low-cost configuration using the light emitting element 371 and the light receiving element 372, but may be configured using ultrasonic waves or microwaves.

FIG. 4 is a system configuration diagram showing another embodiment of the present invention, wherein the same reference numerals as those of the above-mentioned embodiment indicate the same or corresponding parts.

In this embodiment, when the quality of the treated water discharged from the wastewater treatment device 3 is abnormal, the drainage flow path is switched to discharge the treated water from the wastewater treatment device 3 to the sewage through the filtration device 9. It is like that.

That is, the treated water from the wastewater treatment device 3 normally flows from the switching valve 4 to the sewage via the drainage pipe 6, but when a water quality abnormality occurs, the switching valve 4 is switched to switch the filtration device 9 over. The treated water separated into solid and liquid in the filtration device 9 is discharged to the sewage. Filtration device 9
Can be realized by, for example, a configuration in which a filter having a passing particle size of several hundred μm to 1 mm is built in.

As described above, according to each of the above embodiments,
It is possible to prevent a problem that the apparatus cannot be used due to temporary contamination of the quality of the treated water discharged from the wastewater treatment apparatus 3.

In addition, even when the quality of the treated water from the wastewater treatment apparatus 3 is continuously dirty,
Since the contaminated treated water can be discharged after solid-liquid separation, the disposer 1 can be used for an emergency.

For example, after notifying the user of the abnormality, the user is allowed to use the device only once or several times, and then does not accept the start switch of the disposer 1 so as not to use the device.

Further, since the wastewater is treated water from the wastewater treatment device 3, it has a low oil content and good sedimentation properties, so that solid-liquid separation by sedimentation and filtration is relatively easy, and adverse effects on sewers and the like can be prevented.

Also, by making it possible to use the garbage once or several times, it is possible to process garbage that has already been put into the disposer 1 or garbage generated before a maintenance company comes to take care of it. Becomes

FIG. 5 is a system configuration diagram showing still another embodiment of the present invention, and the same reference numerals as those of the above-mentioned embodiment indicate the same or corresponding parts.

In this embodiment, when the quality of the treated water discharged from the wastewater treatment device 3 is abnormal, the drainage flow path from the disposer 1 is switched to discharge to the sewage without passing through the wastewater treatment device 3. Things.

Usually, the waste water containing garbage and domestic waste water when the disposer is used flows into the waste water treatment device 3 through the pipe 2 and the switching valve 4a, and is treated there.
It is discharged to sewage through.

On the other hand, the SS of the treated water from the wastewater treatment device 3
If the concentration exceeds the set value, it is considered that the water quality is abnormal, the use of the disposer 1 is prohibited, and the switching valve 4 is used.
By switching a to the drain pipe 6a to the sewage, the domestic waste water is discharged directly to the sewage, so that it is possible to prevent the domestic waste water from flowing into the waste water treatment device 3. As a result, the SS concentration of the treated water from the wastewater treatment device 3 can be reduced, and the device cannot be used for a long time due to temporary contamination of the quality of the treated water discharged from the wastewater treatment device 3. Can be.

FIG. 6 is a flowchart showing a processing procedure for determining a water quality abnormality in each of the above embodiments.

First, in order to measure the timing for detecting the SS concentration, a predetermined time is waited (NO in decision 101).
Loop), the value of the SS concentration is fetched (process 102). The values captured here are the values filtered multiple times,
For example, at time t1 in FIG.
This is a value (effective value) obtained by averaging the remaining three values excluding the maximum value and the minimum value.

Next, it is checked whether or not the value of the SS concentration taken in above is larger than a predetermined set value (for example, 300 mg / l) (judgment 103).
The counter for counting the number of times of detection is counted up (Y in decision 103 → process 104), and if not large, the counter is reset (N in decision 103 →
(Process 105) Return to the first judgment 101.

When the above counter is counted up (step 104), it is checked whether or not it has exceeded a predetermined count value (for example, four times). If not, the flow returns to the first judgment 101. (N in Judgment 106 → Judgment 101).

When the value of the counter becomes equal to or more than the prescribed count value, for example, when the time becomes t6 → t7 → t8 → t9 in FIG. 3, the counter is reset and the above-described processing at the time of detecting the water quality abnormality is executed. (Y in determination 106 → process 107 → process 108). That is, the switching of the drainage flow path from the wastewater treatment apparatus 3 and the use of the disposer 1 are prohibited, and the drainage flow path from the disposer 1 is switched and discharged without passing through the wastewater treatment apparatus 3 or via a telephone line. To notify the maintenance contractor of the abnormality.

[0062]

As described above, according to the present invention, a wastewater treatment device for purifying wastewater, water quality detection means for detecting the quality of treated water treated by the wastewater treatment device, and a wastewater treatment device A reprocessing unit that reprocesses the treated water, a switching unit that switches between discharging the treated water from the wastewater treatment device to a discharge destination such as sewage or the like, and a water quality detection unit. Control means for controlling the switching means to switch the drainage flow path from the wastewater treatment apparatus from the discharge destination of sewage or the like to the reprocessing unit when a water quality abnormality is detected based on the obtained effective value of the water quality. Accordingly, it is possible to prevent the device from being completely unusable due to the temporary deterioration of the quality of the treated water from the wastewater treatment device.

A wastewater treatment device for purifying wastewater containing garbage crushed by the crushing means, a water quality detection means for detecting the quality of the treated water treated by the wastewater treatment device, Switching means for switching between discharging wastewater to a wastewater treatment device and discharging to a discharge destination such as sewage; and crushing means when water quality abnormality is detected based on an effective value of water quality obtained using water quality detection means. Control means for prohibiting the use of wastewater and / or controlling the switching means to switch the drainage flow path from the crushing means to a discharge destination such as sewage without passing through the wastewater treatment apparatus. It can be prevented that the device cannot be used at all for a long period of time due to the temporary deterioration of the water quality.

Further, the water quality detecting means is provided with an SS concentration detecting device for detecting the SS concentration in the treated water from the wastewater treatment device, and the control means is configured to determine whether the SS concentration obtained by using the SS concentration detecting device is effective. If the value exceeds the set value, by controlling the switching means and switching the drainage flow path from the wastewater treatment apparatus from the discharge destination of sewage or the like to the reprocessing unit, the drainage can be drained with a relatively simple configuration. It can be prevented that the apparatus cannot be used at all due to the temporary deterioration of the quality of the treated water from the processing apparatus.

Further, the water quality detecting means is provided with an SS concentration detecting device for detecting the SS concentration in the treated water from the wastewater treatment device, and the control means is configured to determine whether the SS concentration obtained by using the SS concentration detecting device is effective. When the value exceeds the set value, the use of the crushing unit is prohibited and / or the switching unit is controlled to switch the drain passage from the crushing unit to a discharge destination such as sewage without passing through a wastewater treatment device. Thus, with a relatively simple configuration, it is possible to prevent the apparatus from being completely unusable for a long period of time due to the temporary deterioration of the quality of the treated water from the wastewater treatment apparatus.

Further, the control means, when the water quality abnormality is detected based on a plurality of effective values of the water quality obtained using the water quality detection means, not on the basis of the temporary value, on the basis of the switching means. By controlling the drainage flow path from the wastewater treatment device to the reprocessing unit from the discharge destination of sewage or the like, the device becomes unusable due to temporary deterioration of the quality of the treated water from the wastewater treatment device. Can be prevented.

In addition, the control means, when the water quality abnormality is detected not based on a temporary value but on a plurality of times with respect to the effective value of the water quality obtained by using the water quality detection means, the crushing means. And / or controlling the switching means to switch the drainage flow path from the crushing means to a discharge destination of sewage or the like without passing through the wastewater treatment device, thereby treating the treated water from the wastewater treatment device in the same manner as described above. Can be prevented from becoming unusable due to temporary deterioration of water quality.

It is effective that the reprocessing section is provided with a solid-liquid separation means for separating a solid component and a liquid component.
It is preferable to provide a filtration device.

Further, when an abnormality in the quality of the treated water detected by the wastewater treatment apparatus is detected, the control unit informs the user and / or informs the maintenance company of the abnormality, so that the maintenance company can promptly execute the processing. Repair service.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing an overall configuration of a disposer wastewater treatment system as one embodiment of the present invention.

FIG. 2 is a diagram showing an SS concentration detection principle of the SS concentration detection device used in the embodiment.

FIG. 3 is a diagram showing an example in which a water quality abnormality is determined from the amount of light received by a light receiving element in the SS concentration detection device.

FIG. 4 is a system configuration diagram showing another embodiment of the present invention.

FIG. 5 is a system configuration diagram showing still another embodiment of the present invention.

FIG. 6 is a flowchart showing a processing procedure of water quality abnormality determination in each of the embodiments.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disposer 2 Piping 3 Drainage treatment apparatus 31 Flow rate adjustment tank 311 Air lift pump 32 Solid-liquid separation apparatus 33 Composting apparatus 34 Processing tank 341 Communication pipe 342 Diffusion pipe 343 Blower 344 Carrier 35 Precipitation separation tank 351 Air lift pump 352 Coagulant injection apparatus 353 Partition plate 36 Drain pipe 37 SS concentration detection device 371 Light emitting element 372 Light receiving element 4, 4a Switching valve 5 Sedimentation separation device 51 to 53 Partition plate 54 Air lift pump 6, 6a Drain pipe 7 Control device 71 Display device 72 Transmitting device 81 Receiving device 82 Display device 9 Filtration device

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) C02F 11/12 C02F 11/12 Z 4D059 E03C 1/266 Z E03C 1/266 G01N 15/06 E G01N 15/06 21 / 49 Z 21/49 33/18 A 33/18 21/85 Z // G01N 21/85 B09B 3/00 D (72) Inventor Kozo Akamatsu 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo F term (reference) in Denki Co., Ltd. AA06 AA07 BE01 BE31 BE49 CA28 CC01 EA01 EB20

Claims (10)

[Claims] 1. A wastewater treatment device for purifying wastewater, a water quality detection means for detecting the quality of treated water treated by the wastewater treatment device, and a reprocessing device for retreating treated water treated by the wastewater treatment device A processing unit, a switching unit for switching between discharging the treated water from the wastewater treatment device to a discharge destination such as sewage or discharging to the reprocessing unit, and an effective value of water quality obtained using the water quality detection unit. Control means for controlling the switching means to switch a drainage flow path from the wastewater treatment apparatus from a discharge destination of sewage or the like to the reprocessing unit when a water quality abnormality is detected based on Wastewater treatment system. 2. A wastewater treatment device for purifying wastewater containing garbage crushed by the crushing means, a water quality detection means for detecting the quality of treated water treated by the wastewater treatment device, and the crushing means. Switching means for switching whether to discharge the wastewater from the wastewater treatment apparatus to the discharge destination such as sewage, and when a water quality abnormality is detected based on the effective value of the water quality obtained using the water quality detection means. And control means for prohibiting use of the crushing means and / or controlling the switching means to switch a drain passage from the crushing means to a discharge destination of sewage or the like without passing through the wastewater treatment device. A wastewater treatment system characterized by the following. 3. An SS concentration detection device for detecting an SS concentration in treated water from the wastewater treatment device as the water quality detection device, wherein the control device includes an SS concentration detection device using the SS concentration detection device. 2. When the effective value of the wastewater exceeds a set value, the switching unit is controlled to switch a drainage flow path from the wastewater treatment device from a discharge destination of sewage or the like to the reprocessing unit. Wastewater treatment system as described. 4. An SS concentration detecting device for detecting an SS concentration in treated water from the wastewater treatment device as the water quality detecting device, wherein the control device comprises: an SS concentration detecting device that obtains the SS concentration obtained by using the SS concentration detecting device. If the effective value exceeds the set value, the use of the crushing unit is prohibited and / or the switching unit is controlled to control the drainage flow path from the crushing unit to drain water or the like without passing through the wastewater treatment device. The wastewater treatment system according to claim 2, wherein the system is switched to a discharge destination. 5. The switching means when the water quality abnormality is detected not based on a temporary value but on a plurality of times with respect to the effective value of the water quality obtained by using the water quality detecting means. The wastewater treatment system according to claim 1 or 3, wherein the wastewater treatment system is controlled to switch a wastewater flow path from the wastewater treatment device from a discharge destination of sewage or the like to the reprocessing unit. 6. The crushing means when the water quality abnormality is detected not based on a temporary value but on a plurality of times with respect to an effective value of water quality obtained by using the water quality detecting means. 5. The method according to claim 2, wherein the use of wastewater is prohibited and / or the switching means is controlled to switch a drain passage from the crushing means to a discharge destination of sewage or the like without passing through the wastewater treatment device. Wastewater treatment system as described. 7. The wastewater treatment system according to claim 1, further comprising a solid-liquid separation unit configured to separate a solid component and a liquid component as the reprocessing unit. 8. The wastewater treatment system according to claim 7, wherein a sedimentation separation device is provided as said solid-liquid separation means. 9. The wastewater treatment system according to claim 7, wherein a filtration device is provided as said solid-liquid separation means. 10. The control device according to claim 1, wherein, when an abnormality in the quality of the treated water treated by the wastewater treatment device is detected, the control unit informs a user of the abnormality and / or notifies a maintenance company. The wastewater treatment system according to any one of claims 1 to 9.