JP6684976B1 - Contaminant image analysis system used for pretreatment facility of organic waste treatment and operation system of pretreatment facility using contaminant image analysis system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To analyze an internal condition of a foreign matter removing device which constitutes a pretreatment facility to detect a sign of clogging at an early stage and to smoothly operate the pretreatment facility. To provide a contaminant image analysis system for use in pretreatment equipment. SOLUTION: A contaminant removing device 3 for removing contaminants in the organic wastewater containing contaminants, which constitutes a pretreatment facility for treating organic wastes, and an organic wastewater containing contaminants in the contaminant removing device 3 An imaging unit 7 that captures a digital image by capturing a predetermined position where impurities are present and a detection unit 6 that receives the digital image captured by the imaging unit 7 are provided, and the detection unit 6 is stored in advance. The pixel including the designated color data is set in advance by analyzing each pixel of the digital image based on the designated color data that identifies the contaminant contained in the organic wastewater that is thrown into the contaminant removal device 3. If the number of pixels including the designated color data is the set number or more, a detection signal is generated. [Selection diagram] Figure 2

Description

  The present invention relates to a contaminant image analysis system used in a pretreatment facility for organic waste treatment and an operation system of the pretreatment facility using the contaminant image analysis system, and more specifically, in a pretreatment facility having a biological treatment in a subsequent stage. , By using the contaminant image analysis system and contaminant image analysis system used in the biological treatment pretreatment equipment that can smoothly operate the biological treatment by removing the substances that interfere with the biological treatment in the subsequent stage The present invention relates to an operating system of processing equipment.

  Regarding organic wastewater treatment in human waste treatment equipment, which is one of the biological treatments, there is a guideline for the structure of human waste treatment equipment by the Ministry of the Environment. As equipment based on the guideline, firstly, equipment relating to biological treatment for decomposing organic matter in human waste by microorganisms, and second, guideline is also shown regarding pretreatment equipment for the biological treatment.

The pretreatment facility, as described in Patent Document 1, receives a waste human urine that is carried in and removes solid matters such as sand, and fibers such as paper and cloth in the raw urine separated in the sand basin. It is equipped with a crushing device for crushing plastics and a contaminant removing device for separating the contaminants from the finely crushed human waste containing the contaminants.
Contaminants are removed and the separated human waste is sent to a biological treatment tank and subjected to biological treatment such as nitrification and denitrification.

JP 2007-734A JP, 2014-115157, A

  However, there is a case where the normal hexane extract substance content is extremely high and urine is brought into the contaminant removing device. In that case, there is a problem that an oil film is formed on the screen of the contaminant removing device, or that the screen is clogged with a residue.

  When clogging such as oil film formation occurs, a situation in which the operation of the contaminant removing device cannot be continued occurs, and as a result, the treatment liquid of the contaminant removing device cannot be sent to the subsequent treatment process. This resulted in the operation of the entire organic waste treatment facility being affected. Therefore, it may be necessary to manually adjust the input amount of the undiluted solution containing the solid matter or to perform the cleaning of the clogging, and it is necessary to always arrange the personnel. There is.

  In addition, if the contaminant removal device cannot separate contaminants, it will cause a great deal of damage to the organic waste treatment facility if it affects the operation of the entire organic waste treatment facility. is there.

In Patent Document 2, the oil film is detected based on the reflectance of the irradiation light, the ultraviolet light, and the non-irradiation reflectance.
However, with the technology that utilizes the difference in reflectance between light irradiation and non-irradiation, there is a possibility that the oil film on the screen of the contaminant removal device cannot be detected. As a result, the impact on the operation of the entire organic waste treatment facility cannot be avoided.

  Therefore, the problem of the present invention is to analyze the situation in the foreign matter removing device that constitutes the pretreatment facility, to detect the sign of clogging at an early stage, and to operate the pretreatment facility smoothly. An object of the present invention is to provide a contaminant image analysis system used in a pretreatment facility for the treatment of organic waste.

Further, another object of the present invention is to continue the operation of the foreign matter removing device by utilizing the analysis result of the image analysis device, detecting the sign of the clogging at an early stage, and taking the preventive measures for the clogging. It is possible to provide the operation system of the pretreatment facility using the contaminant image analysis system, which can perform the operation of the entire pretreatment facility smoothly.
Furthermore, other problems of the present invention will be clarified by the following description.

    The above problems are solved by the following inventions.

1. A contaminant removal device that constitutes a pretreatment facility for treating organic waste and removes contaminants from the organic wastewater containing contaminants,
An image capturing unit that captures a digital image by capturing a predetermined position where the contaminants in the contaminant-containing organic wastewater in the contaminant removing device are present,
A detection unit that receives the digital image acquired by the imaging unit,
The detection unit is configured to analyze each pixel of the digital image based on pre-stored designated color data that identifies a contaminant contained in the organic wastewater to be introduced into the contaminant removal device, thereby performing the designation. An organic characteristic characterized by detecting whether or not there are a preset number of pixels including color data and generating a detection signal when the number of pixels including the designated color data is equal to or greater than the preset number. A foreign matter image analysis system used in the pretreatment facility for waste treatment.
2. The contaminant image analysis system for use in the pretreatment facility for treating organic waste according to the item 1, wherein the contaminant removing device is a rotary drum screen.
3. It is an operation system of a pretreatment facility using a contaminant image analysis system used in the pretreatment facility of the organic waste treatment according to 1 or 2 above,
The pretreatment facility includes a control unit connected to the detection unit,
When the control unit receives the detection signal from the detection unit, it uses a contaminant image analysis system characterized by reducing the input amount of the contaminant-containing organic wastewater that is input into the contaminant removal device. Operating system for pretreatment equipment.
4. When the control unit receives the detection signal a plurality of times, the control unit reduces the input amount of the contaminant-containing organic wastewater that is input to the contaminant removal device. The operating system of the pretreatment equipment that was used.
5. The control unit stops the input of the organic wastewater when the detection signal is received once or a plurality of times in a state in which the input amount of the organic wastewater containing the contaminants that is input to the foreign matter removal device is reduced. The cleaning system is executed, and the operation system of the pretreatment facility using the contaminant image analysis system according to 3 or 4 above.
6. 6. The operation system of a pretreatment facility using the contaminant image analysis system according to 3, 4, or 5, wherein the contaminant removing device is a rotary drum screen.

  According to the present invention, utilizing the analysis result by the image analysis device, to detect the sign of clogging at an early stage, by taking preventive measures for clogging, it is possible to continue the operation of the contaminant removal device, It is possible to provide an operation system of a pretreatment facility using a contaminant image analysis system that can smoothly operate the entire treatment facility.

  Further, according to the present invention, by utilizing the analysis result by the image analysis device, the sign of clogging is detected at an early stage, and by taking preventive measures against clogging, it is possible to continue the operation of the contaminant removing device. It is possible to provide an operation system of a pretreatment facility using a foreign matter image analysis system capable of smoothly operating the entire pretreatment facility.

  Furthermore, according to the present invention, overflow can be prevented, and the sign of clogging can be detected only by detecting the color in the digital image. Therefore, it is possible to continue the operation with simple control, and It is possible to provide a contaminant image analysis system used for a pretreatment facility for organic waste treatment that can take preventive measures against clogging without intervention, and an operation system for a pretreatment facility using the contaminant image analysis system.

The figure which shows the flow of operation of the pretreatment equipment in the human waste treatment The figure which shows an example of a structure of the driving system concerning this embodiment. Front view of foreign matter removal device Side cross-sectional view of foreign matter removing device The figure which shows an example of the flow of operation of the driving system concerning this embodiment. The figure which shows an example of the flow of the overflow prevention control processing. Diagram showing an example of the flow of overflow sign detection processing The figure which shows an example of the flow of a cleaning process. The figure which shows the modification of the flow of overflow prevention control processing.

  Hereinafter, modes for carrying out the present invention will be described.

  The present invention relates to an organic wastewater treatment system in an organic waste treatment facility. In an organic waste treatment facility, in organic waste treatment, first, organic wastewater that is a stock solution is subjected to solid-liquid separation in a pretreatment facility. The pretreatment for storing the treatment liquid in the storage tank is performed, and the treatment liquid stored in the storage tank is diluted with water to the biological treatment method of biological treatment in the biological treatment equipment and the sewage discharge standard. The sewage discharge method of discharging into sewage is mentioned.

  Examples of biological treatment methods include human waste treatment, sludge regeneration treatment, methane fermentation treatment, and sewage treatment.

  Examples of organic wastewater include human waste and sludge. In the present embodiment described below, unless otherwise specified, human waste may be raw urine alone, septic tank sludge, or a mixture of raw urine and septic tank sludge.

Here, the septic tank sludge includes sludge collected from the combined treatment septic tank, community plant, agricultural settlement drainage equipment, fishery settlement drainage equipment, single treatment septic tank and the like.
Hereinafter, the human waste treatment in the biological treatment will be described as an example.

  The organic wastewater treatment system in the human waste treatment facility includes a human waste pretreatment facility, a septic tank sludge pretreatment facility, and a biological treatment facility that performs a treatment including biological treatment on the treated liquid that has undergone these pretreatments. .

Next, pretreatment equipment for human waste treatment will be described with reference to FIG.
FIG. 1 is a diagram showing an operation flow of a pretreatment facility in human waste treatment.

  In FIG. 1, the pretreatment facility includes a receiving tank 1, a crushing device 2, a contaminant removing device 3, a dehydrating device 4, and a cleaning device 5.

  The receiving tank 1 receives the transported urine and removes solid matter such as sand by gravity precipitation. In order to facilitate gravity settling and to easily store the sediment, the receiving tank 1 is preferably provided with a sand sloping tank having an inclined structure, and a human urine storage tank for storing human waste containing solids that does not sink in the sand sunk tank. It is preferable that the solid matter such as sand settled at the bottom of the sand settling tank is periodically extracted by a sampling pump, washed with water, and then incinerated or landfilled. The extraction pump is not particularly limited, but it is preferable to use a vacuum pump in order to prevent the diffusion of odors.

  The human waste containing solid matter stored in the human waste storage tank of the receiving tank 1 is sent to the crushing device 2. Examples of solid materials include fibers such as paper and cloth, and plastics. The crushing device 2 crushes mixed fibers such as paper and cloth, and plastics. The crushing device 2 is not particularly limited, but a crushing pump equipped with a crushing impeller can be used. It is also possible to use a mechanism in which the crushing impellers are provided in three stages and can be crushed into smaller sized pieces such as primary crushing, secondary crushing and tertiary crushing.

  By the crushing pump of the crushing device 2, solid matters such as fibers and plastics such as paper and cloth mixed in human waste are finely crushed to become foreign matters, and human waste containing the foreign matters is removed from the foreign matter removing apparatus 3 Sent to.

  In the contaminant removing device 3, contaminants (residues) are removed from the sent human waste containing contaminants. Details of the contaminant removing device 3 will be described later.

  The human waste from which the impurities have been removed is temporarily stored in a human waste storage tank (not shown), sent to a biological treatment facility (not shown) in the subsequent stage, and biologically treated.

  The contaminants removed by the contaminant removing device 3 are sent to the dehydrating device 4 and dehydrated. A centrifuge, a belt press, a screw press, or the like can be appropriately used as the dehydrator. Dehydration can also be performed separately in the primary and secondary. In that case, for example, a centrifugal separator or a belt press can be used as the primary dehydration, and a compression system device such as a screw press can be used as the secondary dehydration. The dehydrated residue is either incinerated or landfilled. The separated water from the dehydrator 4 is returned to the receiving tank 1.

The cleaning device 5 is configured to clean the screen 32a (see FIG. 4) of the rotary drum 32 of the contaminant removing device 3. A casing 31 is provided on the outer periphery of the rotary drum 32 of the foreign matter removing device 3, and hot water washing water is supplied from the washing device 5 toward the screen 32a. A cleaning nozzle (not shown) for supplying the cleaning water is arranged between the casing 31 of the contaminant removing device 3 and the rotary drum 32, and pressure water is directed from the cleaning nozzle toward the rotary drum 32. The cleaning water is supplied.
When the cleaning device 5 performs the cleaning process, the warm water cleaning water described above may be either normal pressure hot water or high pressure hot water. It is also possible to wash with a chemical such as an alkali.

  As a result, when the screen 32a of the rotary drum 32 of the contaminant removal device 3 is clogged with residue or an oil film is formed, cleaning water is supplied from the housing 31 side toward the screen 32a of the rotary drum 32. Then, cleaning can be performed to eliminate the clogging. Normally, washing is performed once a day.

  Hereinafter, the control unit and the foreign matter image analysis system provided in the pretreatment facility according to the present embodiment will be described with reference to FIGS. 2, 3, and 4.

  FIG. 2 is a diagram showing an example of the configuration of the operation system according to the present embodiment, FIG. 3 is a front view of the contaminant removing device 3, and FIG. 4 is a side view of the contaminant removing device 3. It is a figure which shows sectional drawing. 3 and 4 show an example of the positional relationship between the contaminant removing device 3 and the image capturing unit (camera) 7.

As shown in FIG. 2, the control unit 100 is connected to the crushing device 2, the contaminant removing device 3, the cleaning device 5, and the detection unit 6, and the detection unit 6 is connected to the imaging unit 7.
Here, although not shown, the contaminant image analysis system according to the present invention includes an image capturing unit 7 that captures at least a contaminant removing device 3 and a predetermined position inside the contaminant removing device 3 to obtain a digital image. , And a digital image acquired from the image pickup unit 7 detects a sign of clogging from the condition inside the contaminant removing device 3, and when a sign of clogging is detected, generates an overflow detection signal. It is composed of a part 6.

  The contaminant removing device 3 includes a housing 31 that houses a cylindrical drum, and a rotary drum screen 32 (hereinafter, also simply referred to as a rotary drum) having a plurality of screens 32a formed in the housing 31. It is provided.

  The rotary drum screen 32 is not particularly limited in the form of the screen as long as the screen 32a formed on the rotary drum body is formed, and may be a slit type or a round hole type. Hereinafter, an example in which the screen uses a slit type will be described.

  Numeral 33 is an input part for inputting the urine containing the contaminants sent from the crushing device 2, and the input part 33 is provided inside the rotary drum screen 32 with an input port 330 for inputting the human waste.

  In the contaminant removing device 3, the rotary drum screen 32 is formed so as to separate and remove contaminants from the contaminant-containing urine fed from the crushing device 2 in the rotary drum screen 32 by axial rotation. ing.

  As described above, in this embodiment, the rotary drum screen 32 having the screen 32a is used. The screen 32a provided on the rotary drum 32 may have coarse eyes or fine eyes. For example, when the screen 32a is coarse, it is formed to have a width of 4 mm, and when it is fine, it is formed to have a width of 1 mm. In the following description, an example using the rotary drum screen 32 in which the fine screen 1 having a width of 1 mm is formed will be described.

  As shown in FIGS. 3 and 4, the foreign matter removing device 3 has a window portion 34 formed on the lower front side for confirming the internal condition, and the image pickup unit (camera) 7 is provided with a drum from the window portion 34. It is arranged so that the position A near the center of the inside of the screen 32 can be monitored.

  In the following description, the image capturing unit (camera) 7 will be described as the camera 7 except when the image capturing unit and the camera need to be described separately.

  By capturing the position A inside the screen 32 of the contaminant removing device 3 with the camera 7, it is possible to monitor the clogging of the screen 32a of the rotary drum screen 32.

  In the present embodiment, since the camera 7 is provided outside the contaminant removing device 3, there is a case where there is a light source such as a lighting fixture in the building or sunlight entering the building (hereinafter, simply referred to as a light source). When the light from the light source strikes the window 34 of the contaminant removing device 3, the reflected light from the window 34 may affect the digital image captured by the camera 7. In this case, it is preferable to provide a light shielding plate or a cloth-like sheet having a light shielding function between the camera 7 and the window 34 and the light source so that there is no influence of the reflected light from the window 34. Further, the light shield plate may be configured to be attached outside the contaminant removal device 3 so that the window 34 is not irradiated with light. As a result, it is possible to prevent the captured digital image from being affected by light.

  The detection unit 6 includes an image acquisition unit 60, a storage unit 61, and an image analysis unit 62.

  The image acquisition unit 60 can acquire a digital image captured by the camera 7.

  The storage unit 61 stores designated color data for comparison detection with the color data included in each pixel of the digital image.

  The designated color data is data of a designated color that identifies impurities including the normal hexane extract substance that causes overflow due to clogging of the screen 32a in the rotary drum screen 32.

Examples of the designated color data include RGB data.
RGB data is color data defined by 3 bytes of data (red data: 8 bits, green data: 8 bits, blue data: 8 bits, total 24 bits).
The red data can be expressed in 8 bits, that is, 0 to 255 (decimal notation) up to a total of 256 levels. The same applies to green and blue.

As an example of this embodiment, brown data (# 734e30) can be exemplified as the designated color. Here, each value of the brown data (# 734e30) is displayed in hexadecimal notation, and the decimal notation is shown in parentheses (). 73 (116 ₁₀ ) is red data, 4e (78 ₁₀ ) is green data, and 30 (48 ₁₀ ) is blue data.

  The designated color data, for example, causes an overflow in the test stage in advance, images the overflow state, extracts the color of the screen portion that causes the clogging based on the captured digital image data, and extracts it. The selected color can be stored in the storage unit 61 as the designated color. For example, in the present embodiment, the illustrated brown color can be extracted as the designated color and the brown data can be stored in the storage unit 61. In the present embodiment, when capturing the overflow condition, it may be possible to capture the impurities causing the clogging, or the camera may capture the overflow condition caused by the clogging. May be.

  The image analysis unit 62 can compare the color data included in each pixel of the acquired digital image with the designated color data stored in advance in the test stage in the overflow prevention control process described later.

  The camera 7 monitors the position A inside the foreign matter removing apparatus 3 and captures a digital image to be acquired by the image acquisition unit 60. As the camera 7, a network camera or a WEB camera can be used.

  The network camera is an integrated camera and computer, and the camera itself has an IP address. The network camera is directly connected to the network, has a built-in Web server, FTP server, FTP client, and email client, for example, and can be equipped with an alarm management function, a programmable function, and many other functions.

  The WEB camera is used by being connected to a PC via an interface such as USB or IEEE1394 port.

  Here, the rotary drum screen 32 of the contaminant removing device 3 is rotating, the rotation speed is about 5 to 30 rpm, and when the rotary drum screen 32 is rotating at 30 rpm, the position A is It takes 2 seconds for the rotary drum screen 32 to rotate once.

  Then, assuming that the inner circumference of the rotary drum screen 32 is about 280 cm and the imaging width in the circumferential direction of the position A of the imaging part of the camera is 80 cm, by imaging at the position A four times in at least 2 seconds, It is possible to image the situation over the entire inner circumference. Therefore, in this case, the image capturing speed when capturing with the above-described camera 7 is preferably about 2 fps to 10 fps because it is sufficient that the image capturing can be performed 4 times in 2 seconds.

  Furthermore, from the viewpoint of being able to reliably monitor the inside of the screen of the entire circumference by capturing the images of the entire circumference in a frame image in an overlapping manner, it is more preferable that the imaging speed be about 3 fps or more. .

  For example, in the state where the rotary drum screen 32 is rotating at 30 rpm, when capturing the entire circumference at position A, if the image capturing speed of the camera 7 is 3 fps, it is possible to capture images of 3 frames per second. An image of 6 frames is captured in 2 seconds. In this case, the situation inside the screen can be reliably captured over the entire circumference. Then, the image acquisition unit 60 can capture an image and acquire the acquired 6-frame digital image.

  The number of pixels of the image per frame acquired by the camera 7 is preferably 200,000 to 3 million pixel size. The number of pixels of the moving image and digital image captured by the camera is determined according to the resolution and image size of the captured digital image, and the resolution and image size of the captured digital image are necessary for monitoring the driving situation. It can be appropriately changed according to factors such as the required accuracy, the operation processing speed, and the like, and the storage capacity in the system and the like.

  The operation flow of the operation system of this embodiment will be described based on FIGS. 5 to 8.

  FIG. 5 is a diagram showing an example of an operation flow of the operation system according to the present embodiment. The operation flow of the operation system according to the present embodiment will be described based on FIG.

  First, in the pretreatment facility, the contaminant removing device 3 and the camera 7 are activated (S1). As a result, the foreign matter removing device 3 rotates about its axis, and the camera 7 can capture an image of the predetermined position A.

  Next, in the pretreatment facility, the crushing device 2 is activated (S2). As a result, the urine containing the crushed contaminants is sent to the contaminant removing device 3.

  Next, a digital image is acquired from the camera 7 every predetermined time (S3). For example, as described above, the camera 7 captures an image of the position A (see FIG. 4) of the rotary drum screen 32 of the contaminant removal device 3 at the image capturing speed of 3 fps, and the rotary drum screen 32 rotates once in two seconds. When set to (30 rpm), a digital image of 6 frames can be acquired in 2 seconds.

  By imaging this at predetermined time intervals (imaging interval), the situation inside the rotary drum screen 32 can be monitored. If the imaging interval is set to, for example, 5 minutes, a digital image of 6 frames will be taken once every 5 minutes, so this is taken every 5 minutes during the operation time. As a result, the situation at the position A in the rotary drum screen 32 can be grasped, and as a result, as will be described later, it is possible to detect the sign of overflow by transmitting a digital image to the detection unit 6. it can.

Next, the overflow prevention control process is executed based on the acquired digital image (S4).
Overflow prevention control processing will be described based on FIGS. 6 and 7.

FIG. 6 shows a flow chart of the overflow control processing.
In FIG. 6, first, an overflow sign detection process is executed (S41).
FIG. 7 shows an example of the processing flow of the overflow sign detection processing.

In FIG. 7, first, it is determined whether or not there is a reduced driving signal (S411).
That is, it is determined whether the reduction operation is in progress (S411), if the reduction operation is in progress (YES in S411), it is determined whether the monitoring time has elapsed (S412), and if the monitoring time has elapsed, Then, the operation of the crushing device 2 is returned to the normal operation (S413), and the process of detecting the sign of overflow is ended.

  The determination of whether or not the reduced operation is being performed in S411 can be determined based on whether or not the reduced operation signal is detected.

  Here, the reduced operation signal is a signal of an index for determining whether the operation of the crushing device 2 is switched, and is a signal generated when the operation is switched. With this signal, it is possible to change the processing content for the foreign matter removing device 3 of the equipment by the determination in S43 described later.

The monitoring time is the time to monitor whether or not a sign of overflow is detected on the rotary drum during operation in a state where the amount of urine that contains contaminants is reduced, and this monitoring time is exceeded. When a flow sign is detected, the input of organic wastewater to the rotary drum is stopped and the rotary drum is washed, and the operation is performed during the monitoring period, that is, in the state where the amount of urine input is reduced due to foreign substances. If no sign of overflow is detected in the rotating drum, it will return to normal operation.
That is, by setting the monitoring time, it is possible to accurately grasp the sign of the overflow and prevent the overflow. As a result, it is possible to prevent the overflow that may have a great influence on the subsequent processing process in the equipment, and to operate the equipment smoothly.

  On the other hand, when the reduction operation is not in progress (NO in S411) and during the reduction operation monitoring time (NO in S412), the detection unit 6 causes the image analysis unit 62 to specify the designated color data stored in advance in the storage unit 61. (For example, brown) and a digital image are acquired, and it is compared whether or not each pixel of the acquired digital image includes brown data (# 734e30) that is designated color data (S414). With this, it is possible to analyze whether or not the pixel including the designated color data is present in the digital image, and by analyzing this with respect to all the pixels, the number of pixels including the designated color can be detected. .

  Here, it is also possible to search with color data within a predetermined range from the designated color. For example, since the designated color is a combination of RGB color data, each color can have a range. That is, when the predetermined range is ± 3 from the specified color, 70 to 76 if R is 73, 4b to 51 if G is 4e, 2d to 33 if B is 30, and color data of the predetermined range Can also be detected.

  Further, it is possible to change the width of the predetermined range for each color, for example, R is ± 5, G is ± 1, and B is ± 3. Further, the width of the predetermined range is not limited to the value of the designated color data, and a width based on the ratio from the designated color may be provided. Thus, by providing the width, it can be considered in more detail as a substance that interferes with the subsequent processing.

  Next, it is determined whether or not the number of detected pixels is less than a preset number (S415). The set number of set pixels depends on the number of pixels of the digital image to be acquired. For example, in the case of a digital image of 300,000 pixels, the set number of predetermined pixels is set to 20000 pixels. Can be set. The set number of pixels can be appropriately changed according to the number of pixels of the acquired digital image.

  When the number of pixels of the designated color data is less than the set number (NO in S415), it is determined that there is no sign of overflow, the overflow sign detection process is terminated, and overflow prevention control is performed. Return to processing (FIG. 6).

On the other hand, when the number of pixels is equal to or larger than the set number (YES in S415), an overflow detection signal is generated (S416). Here, when it is determined that the number of pixels is equal to or larger than the set number, if there are a plurality of digital images received from the above-described camera 7, at least one digital image is designated color data. When the number of pixels is equal to or more than the set number, an overflow detection signal may be generated. For example, in two or more than half of received digital images, the designated color data is used. When a certain number of pixels is equal to or larger than the set number, the overflow detection signal may be generated. As a result, the operation control can be performed in stages.
The overflow sign detection signal generated by the detection unit 6 is transmitted to the control unit 100, the overflow sign detection process ends, and the process returns to the overflow prevention control process (FIG. 6).

  In this embodiment, the digital image and the designated color may be transmitted together with the sign detection signal. By transmitting the digital image and the designated color, the driver at a remote place can visually confirm the facility if the facility is to be remotely monitored.

  Next, it is determined whether or not there is a sign detection signal (S42), and when the sign detection signal is not transmitted (NO in S42), the overflow prevention control process is repeatedly executed until the operation time described later ends. To do.

  On the other hand, when the symptom detection signal is transmitted (YES in S42), it is determined whether or not there is a reduced driving signal (S43), and when there is no reduced driving signal (NO in S43), the crushing device 2 The input amount of urine containing foreign matter from is reduced (input reduction operation) (S44), a reduction operation signal is generated, and the monitoring time is set (S45).

  Therefore, in the determination of S43, if there is a reduced operation signal (YES in S43), the operation of the crushing device 2 is stopped (S46), and the entry of urine containing foreign matter into the foreign matter removing device 3 is stopped. After that, the cleaning process of the contaminant removing device 3 is executed (S47).

  The cleaning process will be described with reference to FIG. FIG. 8 shows an example of the cleaning process.

  First, in the cleaning process, the hot water cleaning pump provided in the cleaning device 5 is started (S471). The pump is started, and the screen 32a provided on the rotary drum screen 32 of the contaminant removing device is sprayed with hot water washing water from a nozzle hole (not shown) toward the rotary drum 32 from the housing 31 side for a predetermined time. Wash until elapsed. The cleaning method is not particularly limited.

  Next, it is determined whether or not the cleaning time has passed a predetermined time (S472), and the cleaning is continued until the predetermined time has passed (NO in S472).

  Next, when a predetermined time has passed (YES in S472), the hot water washing pump is stopped (S473).

  Here, it is determined whether or not the cleaning is to be performed after the operating time of the pretreatment equipment is finished (S474), and if the operating time is after (YES in S474), the cleaning process is terminated, while before the operating time is terminated. If there is (NO in S474), the stopped state of the crushing device 2 is released, the operation is returned to normal operation (S475), and the cleaning process ends.

  When the process for generating the reduced operation signal in S45 and the process for setting the monitoring time or the cleaning process in S47 ends, the overflow prevention control process ends, and the operation flow returns to FIG.

  Next, in the operation flow of FIG. 5, steps S3 and S4 are repeated until the operation end time of the pretreatment facility is reached (NO in S5 and S5), and when the end time is reached (YES in S5), the crushing device 2 is set. Stop (S6).

  Next, a cleaning process is executed (S7). Regarding the cleaning process, the description of FIG. 8 described above is cited and omitted.

  Then, the contaminant removing device is stopped (S8), and the operation is terminated.

  In the present embodiment, when the end time comes, the control unit of the organic wastewater treatment system in the organic waste treatment prompts the driver to stop the crushing device and the contaminant removing device with a display unit (not shown) or the like. An instruction may be displayed, and the driver may stop the crushing device and the foreign matter removing device according to the displayed instruction.

  Furthermore, the control unit may prompt the start / end timing of the cleaning process by the cleaning device, and the driver may operate / stop the cleaning device according to the instruction.

FIG. 9 is a diagram showing a modified example of the processing flow of the overflow prevention control processing.
In FIG. 9, steps that are the same as those in FIG. 6 are similar steps, so the description of FIG. 6 is cited and omitted.

  If there is a detection signal in S42 (YES in S42), it is further determined whether or not the detection signal has been detected a predetermined number of times in succession (S91). The detection signal is generated at the timing when the digital image is acquired, and whether or not there is a sign of overflow. That is, when the predetermined time for digital image acquisition is 5 minutes and the number of consecutive detections is 3 times, it is detected 5 minutes after at least the first detection, and 3 times for the first time after 5 minutes. Therefore, it is determined that the overflow sign is detected for the first time by detecting at least 5 minutes after the first detection, and further after 10 minutes, and at the shortest 10 minutes after the first detection. Will be done. By including the step (S91) of continuous detection in the process, erroneous detection and the like can be prevented, and the operation of the pretreatment equipment can be continued and the subsequent treatment can be prevented.

  Therefore, in the above case, when the symptom detection signal is generated, it is preferable to provide a counter (not shown) in the control unit 100 and determine whether or not the counter has been detected a predetermined number of times continuously.

  Further, in this case, it is preferable to provide different counters depending on whether the crushing device 2 is in the normal operation or the input amount reducing operation.

  For example, the counter during normal operation is m, the counter during reduced input operation is n, and when the overflow sign signal is detected during reduced input operation, the counter n is added. Let go

  In addition, it is preferable that after the cleaning process, the counters m and n are reset so that the operation of the pretreatment facility is not affected.

  Specifically, in the present embodiment, when determining whether or not continuous detection is performed, it is preferable to provide a counter (not shown) in the control unit 100 when YES in S42. When this counter reaches the set number of times, it can be determined that continuous detection has been performed. The number of times to be set can be appropriately set depending on the scale of the pretreatment facility, the treatment amount, and the like.

  In this embodiment, the overflow prevention control process can be performed in real time. In this case, the situation inside the rotary drum screen can be grasped in real time by capturing continuous images at a predetermined frame rate, for example, 3 to 10 fps, instead of acquiring a digital image every predetermined time in S3. it can. Then, the image acquisition unit 60 can perform the overflow prevention control process based on the acquired digital image by acquiring the time to acquire the digital image at each set predetermined time.

  By performing in real time, it is possible to understand the relationship between the input stock solution and the sign of overflow, and by executing the overflow prevention control processing at every predetermined time, the effect of processing due to overflow can be obviated. Can be prevented.

  In the above description of the present embodiment, the control unit 100 and the detection unit 6 are described as separate members, but the present invention is not limited to this, and the control unit 100 incorporates the function of the detection unit 6. May be. That is, the detection unit 6 and the image pickup unit 7 can be added to the existing facility. In the case of a new facility, the detection unit 6 and the image pickup unit 7 can be added to the operation control unit provided in the new facility. The function of may be incorporated.

1: Receiving tank 2: Crushing device 3: Contaminant removing device 31: Enclosure 32: Rotary drum screen 32a: Screen 33: Input part 330: Input port 34: Window part 4: Dehydrating device 5: Washing device 6: Detection Part 60: Image acquisition part 61: Storage part 62: Image analysis part 7: Imaging part (camera)
100: control unit

Claims (6)

A contaminant removal device that constitutes a pretreatment facility for treating organic waste and removes contaminants from the organic wastewater containing contaminants,
An image capturing unit that captures a digital image by capturing a predetermined position where the contaminants in the contaminant-containing organic wastewater in the contaminant removing device are present,
A detection unit that receives the digital image acquired by the imaging unit,
The detection unit is configured to analyze each pixel of the digital image based on pre-stored designated color data that identifies a contaminant contained in the organic wastewater to be introduced into the contaminant removal device, thereby performing the designation. An organic characteristic characterized by detecting whether or not there are a preset number of pixels including color data and generating a detection signal when the number of pixels including the designated color data is equal to or greater than the preset number. A foreign matter image analysis system used as a pretreatment facility for waste treatment.   The contaminant image analysis system used in the pretreatment facility for treating organic waste according to claim 1, wherein the contaminant removing device is a rotary drum screen. An operating system of a pretreatment facility using a contaminant image analysis system used in the pretreatment facility of the organic waste treatment according to claim 1 or 2.
The pretreatment facility includes a control unit connected to the detection unit,
When the control unit receives the detection signal from the detection unit, it uses a contaminant image analysis system characterized by reducing the input amount of the contaminant-containing organic wastewater that is input into the contaminant removal device. Operating system for pretreatment equipment.   4. The contaminant image analysis system according to claim 3, wherein the control unit reduces the amount of the contaminant-containing organic wastewater input to the contaminant removal device when the detection signal is received a plurality of times. Operating system of the pretreatment equipment used.   The control unit stops the input of the organic wastewater when the detection signal is received once or a plurality of times in a state where the input amount of the organic wastewater containing the contaminants that is input to the foreign matter removal device is reduced. The cleaning system is executed, and the operation system of the pretreatment facility using the contaminant image analysis system according to claim 3 or 4.   The operation system of a pretreatment facility using a contaminant image analysis system according to claim 3, 4 or 5, wherein the contaminant removal device is a rotary drum screen.

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