JP2002224693A - Sludge intensive treatment system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently perform the prevention against the generation of malodor in a sludge receiving side intensive treatment plant and the reduction of phosphorous load in a sewage treatment plant receiving the return water at the time of treating intensively sludge. SOLUTION: The sludge intensive treatment system, in which the sludge discharged from the sewage treatment plants 1A, 1B and 1C is collected to the sludge intensive treatment plant 2 through sludge feed pipes 3A, 3B and 3C to be treated and the produced liquid separated from the sludge is returned to the sewage treatment plant through a water returning pipe 13, is provided with a monitoring means 4A, 4B and 4C for hydrogen sulfide concentration in the sludge in the sludge feed pipes and a hydrogen sulfide reduction directing means 5 for transmitting a direction of the reduction of hydrogen sulfide in the feed sludge to the sewage treatment plant, from which the sludge is fed through the sludge feed pipe, in the case that the hydrogen sulfide concentration monitored by the monitoring means for concentration of hydrogen sulfide exceeds a set value and a hydrogen sulfide concentration control means 8A, 8B and 8C for controlling the hydrogen sulfide concentration in the sewage treatment plant corresponding to the signal from the hydrogen sulfide reduction directing means 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sludge concentration treatment system, and more particularly, to preventing the generation of odor in a sludge receiving concentration treatment plant and a phosphorus load in a sewage treatment plant receiving return water when the sludge is concentrated. The present invention relates to a sludge intensive treatment system capable of efficiently reducing the amount of sludge.

[0002]

2. Description of the Related Art Sludge treatment in an urban area does not have a sludge treatment facility for each individual sewage treatment plant. A batch processing method is adopted.

[0003]

However, the above-mentioned sludge concentration processing has the following problems.

Normally, since each water treatment plant and the sludge concentration treatment plant are separated from each other, the sludge decays during the sludge feeding, and an odor due to hydrogen sulfide is generated at the concentration treatment plant on the mud receiving side.

[0005] The sludge desorbed liquid treated at the intensive treatment plant is returned to the sewage treatment plant closest to the intensive treatment plant as return water and reprocessed. The load is large and the phosphorus load cannot be predicted.

Accordingly, an object of the present invention is to prevent the generation of odor at the intensive treatment plant on the mud receiving side when performing the intensive treatment of sludge.
It is an object of the present invention to provide a sludge intensive treatment system capable of efficiently reducing a phosphorus load in a sewage treatment plant receiving return water.

[0007]

According to the first aspect of the present invention,
After collecting and treating sludge discharged from one or a plurality of sewage treatment plants by a sludge pipe in a sludge concentration treatment plant, sludge concentration in which generated sludge desorbed liquid is returned to the sewage treatment plant by a return pipe In the system, means for monitoring the concentration of hydrogen sulfide in the sludge in the sludge pipe, and when the concentration of hydrogen sulfide monitored by the means for monitoring the concentration of hydrogen sulfide exceeds a set value, the sewage discharging sludge through the sludge pipe. For the treatment plant,
The present invention is characterized in that hydrogen sulfide warning means for warning reduction of hydrogen sulfide in the outflow sludge is provided.

According to a second aspect of the present invention, the sludge discharged from one or a plurality of sewage treatment plants is collected and treated in a sludge concentration treatment plant by a sludge pipe, and the sludge desorbed liquid generated is returned to a return pipe. In the sludge intensive treatment system that returns to the sewage treatment plant, the hydrogen sulfide concentration monitoring means of the sludge in the sludge pipe, and when the hydrogen sulfide concentration monitored by the hydrogen sulfide concentration monitoring means exceeds a set value A hydrogen sulfide reduction instruction means for transmitting a hydrogen sulfide reduction instruction in the transmitted sludge to a sewage treatment plant that is transmitting sludge by the sludge pipe;
A hydrogen sulfide concentration control means for controlling the hydrogen sulfide concentration in the sewage treatment plant in accordance with a signal from the hydrogen sulfide reduction instruction means is provided.

According to a third aspect of the present invention, the sludge discharged from a single or a plurality of sewage treatment plants is collected from a sludge pipe at a sludge concentration treatment plant and treated, and the sludge desorbed liquid produced is returned to a return pipe. In the sludge concentration treatment system for returning to the sewage treatment plant, the sludge phosphorus concentration monitoring means in the return pipe, and when the phosphorus concentration monitored by the phosphorus concentration monitoring means exceeds a set value, the sludge For the central processing plant,
It is characterized in that phosphorus warning means for warning the reduction of phosphorus in the discharged sludge desorbed liquid is provided.

According to a fourth aspect of the present invention, the sludge discharged from one or a plurality of sewage treatment plants is collected and treated by a sludge pipe at a sludge concentration treatment plant, and the sludge desorbed liquid produced is returned to a return pipe. In the sludge concentration treatment system for returning to the sewage treatment plant, the sludge phosphorus concentration monitoring means in the return pipe, and when the phosphorus concentration monitored by the phosphorus concentration monitoring means exceeds a set value, the sludge For the central processing plant,
It is characterized in that phosphorus reduction instruction means for transmitting a phosphorus reduction instruction in the discharged sludge desorbed liquid, and phosphorus concentration control means for controlling the phosphorus concentration in the sludge concentration treatment plant according to a signal from the phosphorus reduction instruction means are provided. It has.

According to a fifth aspect of the present invention, the sludge discharged from one or a plurality of sewage treatment plants is collected and treated in a sludge concentration treatment plant by a sludge pipe, and the sludge desorbed liquid generated is returned to a return pipe. In the sludge aggregation system that returns to the sewage treatment plant, when the hydrogen sulfide concentration monitoring means of the sludge in the mud pipe and the hydrogen sulfide concentration monitored by the hydrogen sulfide concentration monitoring means exceeds a set value, A hydrogen sulfide warning unit for warning a sewage treatment plant that sends out sludge by the sludge pipe, a reduction in hydrogen sulfide in the sent out sludge; a phosphorus concentration monitoring unit for the sludge in the return pipe; When the phosphorus concentration monitored by the means exceeds a set value, the sludge concentration treatment plant is provided with phosphorus warning means for warning the reduction of phosphorus in the discharged sludge desorbed liquid. It is.

According to a sixth aspect of the present invention, the sludge discharged from one or a plurality of sewage treatment plants is collected and treated by a sludge pipe at a sludge concentration treatment plant, and the sludge desorbed liquid generated is returned to a return pipe. In the sludge intensive treatment system returning water to the sewage treatment plant, in the sludge hydrogen sulfide concentration monitoring means of the sludge in the sludge pipe, when the hydrogen sulfide concentration monitored by the hydrogen sulfide concentration monitoring means exceeds a set value A hydrogen sulfide reduction instruction means for transmitting a hydrogen sulfide reduction instruction in the transmitted sludge to a sewage treatment plant that is transmitting sludge by the sludge pipe;
Hydrogen sulfide concentration control means for controlling the concentration of hydrogen sulfide in the sewage treatment plant according to a signal from the hydrogen sulfide reduction instruction means, phosphorus concentration monitoring means for sludge in the return pipe,
When the phosphorus concentration monitored by the phosphorus concentration monitoring means exceeds a set value, a phosphorus reduction instruction means for transmitting a phosphorus reduction instruction in the sludge desorption solution to the sludge concentration treatment plant; It is characterized in that phosphorus concentration control means for controlling the phosphorus concentration in the sludge concentration treatment plant in accordance with a signal from the reduction instruction means is provided.

According to a seventh aspect of the present invention, at least one of the hydrogen sulfide concentration monitoring means, the hydrogen sulfide reduction instruction means and the hydrogen sulfide concentration control means uses an optical fiber laid on the mud pipe. It is characterized in that the communication is performed by performing the communication.

[0014] According to the present invention, at least one of the phosphorus concentration monitoring means, the phosphorus reduction instruction means and the phosphorus concentration control means communicates using an optical fiber laid on the return pipe. It is characterized by what it does.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the sludge concentration processing system of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of the entire system of the present invention, FIG. 2 is a flowchart showing an example of a process flow for suppressing the generation of hydrogen sulfide in an integrated treatment plant, and FIG. 3 is a hydrogen sulfide reduction instruction means and sewage treatment. FIG. 4 is a block diagram showing a configuration of the hydrogen sulfide concentration control means in the plant, FIG. 4 is a flowchart showing an example of a phosphorus load suppression process flow in the centralized treatment plant, and FIG.
FIG. 3 is a block diagram showing a configuration of a phosphorus reduction instruction unit and a phosphorus concentration control unit in an integrated treatment plant.

In FIG. 1, 1A, 1B and 1C are sewage treatment plants. The number of sewage treatment plants is not limited to a plurality as in this example, and may be one. 2 is an integrated sludge treatment plant, 3A, 3B and 3C are sewage treatment plants 1A, 1B and 1C
Pipes for sending sludge from the plant to the sewage treatment plant 2, 4A, 4B, 4
C is a hydrogen sulfide concentration monitoring means for monitoring the hydrogen sulfide concentration of the sludge in the mud pipes 3A, 3B and 3C, and uses, for example, a UV-absorbance type sensor that can be measured online. it can.

Reference numeral 5 denotes hydrogen sulfide reduction instruction means. The hydrogen sulfide reduction instruction means 5 includes an input unit 6 and a calculation unit 7 as shown in FIG. The input unit 6 determines whether or not the hydrogen sulfide concentration in the sludge receiving unit is equal to or less than a set value. If the hydrogen sulfide concentration is not equal to or less than the set value, the hydrogen sulfide concentration monitoring means 4A, 4B,
The sensor information by 4C is input to the calculation unit 7. The calculation unit 7 compares the sensor information, specifies the maximum value of the hydrogen sulfide concentration by each hydrogen sulfide concentration monitoring unit, and
Based on this maximum value and a database of aeration and polyiron addition effective for reducing hydrogen sulfide, the optimum aeration conditions and optimum polyiron addition conditions that can suppress the hydrogen sulfide concentration below the set value are calculated. The optimum aeration condition signal and the optimum polyiron addition condition signal from the calculation unit 7 are transmitted to a specific sewage treatment plant that sends out sludge through a sludge pipe whose hydrogen sulfide concentration level shows the maximum value. The location of the hydrogen sulfide reduction instruction means 5 is not particularly limited.

8A, 8B and 8C are sewage treatment plants 1A and 1C, respectively.
B, 1C are means for controlling the concentration of hydrogen sulfide. As shown in FIG. 3, each hydrogen sulfide concentration control means includes an aeration device control unit 10 for controlling the aeration device 9 in the sewage treatment plant based on the optimum aeration condition signal from the hydrogen sulfide reduction instruction means 5.
And a polyiron addition device control unit 12 that controls the polyiron addition device 11 in the sewage treatment plant based on the optimum polyiron addition condition signal from the hydrogen sulfide reduction instruction means 5. In addition,
Hydrogen sulfide reduction instruction means 5 and hydrogen sulfide concentration control means 8
The installation locations of A, 8B, and 8C are not particularly limited.

Reference numeral 13 denotes a return pipe disposed in a pipe between the sewage treatment plant 2 and a specific sewage treatment plant, for example, a sewage treatment plant 1C closest to the sewage treatment plant 2. The sludge desorbed liquid is returned to the sewage treatment plant 1C for reprocessing.

14A, 14B and 14C are mud pipes 3A,
This is a phosphorus concentration monitoring means for monitoring the phosphorus concentration of the sludge in the sludge pipes provided in 3B and 3C.

Reference numeral 15 denotes a return pipe 1 provided on the return pipe 13.
This is a phosphorus concentration monitoring means for monitoring the phosphorus concentration of the sludge in 3. As the phosphorus concentration monitoring means 14A, 14B, 14C, and 15, for example, ultraviolet absorption type sensors that can be measured online can be used.

Reference numeral 16 denotes phosphorus reduction instruction means. The phosphorus reduction instructing means 16 includes an input unit 17 and a calculation unit 18 as shown in FIG. The input unit 17 is based on the sensor information from the phosphorus concentration monitoring means 15 of the return pipe 13,
It is determined whether the phosphorus load in the sewage treatment plant 1C exceeds a set value, and if it exceeds, the phosphorus concentration monitoring means 14A,
The sensor information from 14B and 14C is input to the operation unit 18. The calculation unit 18 includes the phosphorus concentration monitoring means 14A, 14
B, sensor information from 14C and mud pipes 3A, 3B, 3
The total phosphorus load in the intensive treatment plant 2 is calculated from the amount of sludge from C, and the optimum dephosphorizing agent addition condition in the intensive treatment plant 2 is calculated from the total phosphorus load and the dephosphorizing agent addition database. The optimum dephosphorizing agent addition condition signal from the arithmetic unit 18 is transmitted to the centralized treatment plant 2. As the dephosphorizing agent, an iron-based flocculant can be used. The phosphorus reduction instruction means 16
Is not particularly limited.

Reference numeral 19 denotes a phosphorus concentration control means. The phosphorus concentration control unit 19 controls the dephosphorizing agent adding device 20 of the centralized treatment plant 2 based on the optimal dephosphorizing agent adding condition signal from the phosphorus reducing instruction unit 16.
It has.

The sludge concentration processing method by the sludge concentration processing system of the present invention having the above-described configuration will be described.

First, the case of controlling the concentration of hydrogen sulfide will be described with reference to FIG.

First, the set value of the concentration of hydrogen sulfide at the sludge receiving section in the integrated treatment plant 2 is set. This set value is a concentration at which the smell of hydrogen sulfide is not felt. Next, it is determined whether or not the hydrogen sulfide concentration at the sludge receiving unit measured by the input unit 6 of the hydrogen sulfide reduction instructing unit 5 is equal to or less than a set value. 4B, 4C
Is input to the calculation unit 7 of the hydrogen sulfide reduction instruction means 5. On the other hand, if it is not more than the set value, the hydrogen sulfide concentration is measured again.

The arithmetic unit 7 of the hydrogen sulfide reduction instructing means 5 compares the hydrogen sulfide concentration levels of the respective sensors based on the sensor information from the hydrogen sulfide concentration monitoring means 4A, 4B, 4C and specifies the maximum value. Then, based on a database of aeration and polyiron addition effective for reducing hydrogen sulfide, the optimum aeration condition and the optimum polyiron addition condition are calculated, and the optimum aeration condition signal and the optimum polyiron addition condition signal are converted to hydrogen sulfide concentration. It is transmitted to a specific sewage treatment plant that sends out sludge by a sludge pipe whose level shows the maximum value.

In the sewage treatment plant receiving the optimum aeration condition signal and the optimum polyiron addition condition signal, the hydrogen sulfide concentration control means 8 performs the optimum aeration and polyiron addition. Then, the concentration of hydrogen sulfide in the sludge receiving section of the intensive treatment plant 2 is measured, and it is determined whether or not the concentration is below the set value.
The sensor information from B and 4C is used to indicate hydrogen sulfide reduction.
To enter.

As described above, the concentration of hydrogen sulfide in the sludge sent is reduced to a set value or less.

Next, when controlling the phosphorus concentration,
This will be described with reference to FIG.

The concentration level of the phosphorus concentration monitoring means 15 at which the phosphorus load at the sewage treatment plant 1C for receiving the return water is equal to or less than the set value is set. Next, it is determined whether or not the phosphorus concentration of the sludge in the return pipe 13 measured by the input unit 17 of the phosphorus reduction instruction means 16 is equal to or less than a set value.
The phosphorus concentration of the sludge in the sludge feed pipes 3A, 3B, 3C is measured by the phosphorus concentration monitoring means 14A, 14B, 14C, and the sensor information is input to the arithmetic unit 18 of the phosphorus reduction instruction means 16. On the other hand, if it is not more than the set value, the phosphorus concentration is measured again.

The calculating section 18 of the phosphorus reduction instructing means 16 calculates the phosphorus load in the integrated treatment plant 2 based on the sensor information from the phosphorus concentration monitoring means 14A, 14B, 14C and the amount of sludge from the mud pipes 3A, 3B, 3C. The total amount is calculated, the optimum phosphorus removing agent addition condition in the centralized treatment plant 2 is calculated from the total phosphorus load and the database of the phosphorus-removing agent addition, and the result is transmitted to the centralized treatment plant 2.

In the centralized treatment plant 2 which receives the optimum dephosphorizing agent addition condition signal, the phosphorus concentration controlling means 19 performs optimum dephosphorizing agent addition. Then, the phosphorus concentration of the sludge in the return pipe 13 is measured by the phosphorus concentration monitoring means 15 to determine whether or not the concentration is equal to or less than a set value.
The phosphorus concentration of the sludge in the sludge pipes 3A, 3B and 3C is measured.

As described above, the phosphorus load in the sewage treatment plant 1C is reduced to the set value or less.

According to the present invention, the concentration of hydrogen sulfide in the sludge at the receiving section of the intensive treatment plant can be reduced to a concentration not causing the smell of hydrogen sulfide to be felt, and the phosphorus load in the sewage treatment plant receiving the return water can be reduced. Reduction can be performed efficiently.

The above description is based on the hydrogen sulfide concentration monitoring means 4A,
When the hydrogen sulfide concentration monitored by B and 4C exceeds the set value, the specific sewage treatment plant that sends out sludge by the sludge pipe automatically controls the reduction of hydrogen sulfide in the sent out sludge. The hydrogen sulfide concentration monitoring means 4
When the hydrogen sulfide concentration monitored by A, 4B, and 4C exceeds a set value, a hydrogen sulfide warning the reduction of hydrogen sulfide in the transmitted sludge to a sewage treatment plant that sends out sludge through the sludge pipe. Warning means may be provided to manually operate the above-described aeration and polyiron addition apparatus according to the warning.

When the phosphorus concentration in the return pipe 13 monitored by the phosphorus concentration monitoring means 15 exceeds a set value,
For the sludge concentration treatment plant 2, the phosphorus reduction in the discharged sludge desorbed liquid is automatically controlled. However, the phosphorus concentration in the return pipe 13 monitored by the phosphorus concentration monitoring means 15 exceeds the set value. In such a case, a phosphorus warning means for warning the phosphorus reduction may be provided, and the above-mentioned phosphorus removing agent adding device may be manually operated according to the warning. Note that the hydrogen sulfide warning means and the phosphorus warning means are instruments and the like, and the means are not particularly limited.

The hydrogen sulfide concentration control and the phosphorus concentration control may be performed separately.

The aeration and / or the addition of polyiron for controlling the hydrogen sulfide concentration may be both or one of them.

The hydrogen sulfide concentration monitoring means 4A, 4B, 4C,
Hydrogen sulfide reduction instruction means 5 and hydrogen sulfide concentration control means 8
At least one of A, 8B and 8C is a mud pipe 3A,
Communication may be performed using optical fibers laid on 3B and 3C, whereby the concentration of hydrogen sulfide can be more reliably and quickly controlled.

Further, the phosphorus concentration monitoring means 14A, 14B,
At least one of 14C, 15, the phosphorus reduction instruction means 16 and the phosphorus concentration control means 19 may perform communication using an optical fiber laid in a return pipe, thereby providing a more reliable and more reliable communication. Phosphorus concentration control can be performed quickly.

[0043]

As described above, the present invention has the following useful effects.

In the intensive treatment of sludge, a hydrogen sulfide concentration monitoring means and a phosphorus concentration monitoring means are installed in a sludge pipe, and a warning of hydrogen sulfide and phosphorus reduction is issued based on sensor information from these means. It is possible to efficiently prevent the generation of odor in the intensive treatment plant on the mud receiving side and reduce the phosphorus load in the sewage treatment plant receiving the return water efficiently.

Also, information for automatically operating the hydrogen sulfide concentration control at the muddy sewage treatment plant and the phosphorus concentration control at the mud receiving intensive treatment plant can be given based on the sensor information. Thus, it is possible to more efficiently prevent the generation of odor in the intensive treatment plant on the mud receiving side and reduce the phosphorus load in the sewage treatment plant that receives the return water.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of the entire system of the present invention.

FIG. 2 is a flowchart showing an example of a process flow of suppressing hydrogen sulfide generation in an integrated treatment plant.

FIG. 3 is a block diagram showing a configuration of a hydrogen sulfide reduction instruction unit and a hydrogen sulfide concentration control unit in a sewage treatment plant.

FIG. 4 is a flowchart showing an example of a phosphorus load suppression processing flow in an integrated processing plant.

FIG. 5 is a block diagram showing a configuration of a phosphorus reduction instructing unit and a phosphorus concentration control unit in an integrated treatment plant.

[Explanation of symbols]

 1A, 1B, 1C: Sewage treatment plant 2: Concentration treatment plant 3A, 3B, 3C: Sludge pipe 4A, 4B, 4C: Hydrogen sulfide concentration monitoring means 5: Hydrogen sulfide reduction instruction means 6: Input unit 7: Operation unit 8A , 8B, 8C: hydrogen sulfide concentration control means 9: aeration apparatus 10: aeration apparatus control section 11: polyiron addition apparatus 12: polyiron addition apparatus control section 13: return pipe 14A, 14B, 14C, 15: phosphorus concentration monitoring means 16: Phosphorus reduction instruction means 17: Input unit 18: Operation unit 19: Phosphorus concentration control means 20: Dephosphorizing agent adding device 21: Dephosphorizing agent adding device control unit

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kenichiro Mizuno 1-2-1 Marunouchi, Chiyoda-ku, Tokyo F-term in Nihon Kokan Co., Ltd. 4D059 AA05 BF20 BK16 CB01 DA24 EA20 EB20

Claims (8)

[Claims] After collecting and treating sludge discharged from a single or a plurality of sewage treatment plants by a sludge pipe, the sludge desorbed liquid generated is returned to the sewage treatment plant by a return pipe. In the sludge concentration system for returning water, the hydrogen sulfide concentration monitoring means of the sludge in the sludge pipe, and when the hydrogen sulfide concentration monitored by the hydrogen sulfide concentration monitoring means exceeds a set value, the sludge pipe is used to remove the sludge. A sludge intensive treatment system, comprising: a hydrogen sulfide warning unit for warning a reduction in hydrogen sulfide in the discharged sludge to a sewage treatment plant that is discharging. 2. Sludge discharged from one or a plurality of sewage treatment plants is collected and treated by a sludge pipe in a sludge concentration treatment plant, and sludge desorbed liquid generated is returned to the sewage treatment plant by a return pipe. In the sludge concentration treatment system for returning water, the hydrogen sulfide concentration monitoring means of the sludge in the sludge pipe, and the hydrogen sulfide concentration monitored by the hydrogen sulfide concentration monitoring means, when the hydrogen sulfide concentration exceeds a set value, the sludge pipe by the sludge pipe. To the sewage treatment plant that is sending water, a hydrogen sulfide reduction instruction means for transmitting an instruction to reduce hydrogen sulfide in the sent sludge, and controlling the concentration of hydrogen sulfide in the sewage treatment plant in accordance with a signal from the hydrogen sulfide reduction instruction means And a hydrogen sulfide concentration control means. 3. Sludge discharged from one or a plurality of sewage treatment plants is collected and treated in a sludge concentration treatment plant by a sludge pipe, and the generated sludge desorbed liquid is returned to the sewage treatment plant by a return pipe. In the sludge concentration processing system for returning water, the phosphorus concentration monitoring means of the sludge in the return pipe, and when the phosphorus concentration monitored by the phosphorus concentration monitoring means exceeds a set value, the sludge concentration treatment plant And a phosphorus warning means for warning that phosphorus in the discharged sludge desorbed liquid has been reduced. 4. After collecting and treating sludge discharged from one or a plurality of sewage treatment plants in a sludge concentration treatment plant by a sludge pipe, the sludge desorbed liquid generated is returned to the sewage treatment plant by a return pipe. In the sludge concentration processing system for returning water, the phosphorus concentration monitoring means of the sludge in the return pipe, and when the phosphorus concentration monitored by the phosphorus concentration monitoring means exceeds a set value, the sludge concentration treatment plant And a phosphorus reduction instruction means for transmitting a phosphorus reduction instruction in the discharged sludge desorbed liquid, and a phosphorus concentration control means for controlling the phosphorus concentration in the sludge concentration treatment plant according to a signal from the phosphorus reduction instruction means. Sludge intensive treatment system. 5. Sludge discharged from one or a plurality of sewage treatment plants is collected and treated in a sludge concentration treatment plant by a sludge pipe, and the generated sludge desorbed liquid is returned to the sewage treatment plant by a return pipe. In the sludge collecting system for returning water, the hydrogen sulfide concentration monitoring means of the sludge in the sludge pipe, and when the hydrogen sulfide concentration monitored by the hydrogen sulfide concentration monitoring means exceeds a set value, the sludge pipe removes the sludge. A hydrogen sulfide warning unit that warns the sending sewage treatment plant of a reduction in hydrogen sulfide in the discharged sludge, a phosphorus concentration monitoring unit for the sludge in the return pipe, and a phosphorus concentration monitored by the phosphorus concentration monitoring unit. A sludge concentration treatment system, comprising: a phosphorus warning means for warning the sludge concentration treatment plant of a decrease in phosphorus in the discharged sludge desorbed liquid when the concentration exceeds a set value. 6. Sludge discharged from one or a plurality of sewage treatment plants is collected and treated by a sludge pipe at a sludge concentration treatment plant, and the generated sludge desorbed liquid is returned to the sewage treatment plant by a return pipe. In the sludge concentration treatment system for returning water, the hydrogen sulfide concentration monitoring means of the sludge in the sludge pipe, and the hydrogen sulfide concentration monitored by the hydrogen sulfide concentration monitoring means, when the hydrogen sulfide concentration exceeds a set value, the sludge pipe by the sludge pipe. To the sewage treatment plant that is sending water, a hydrogen sulfide reduction instruction means for transmitting an instruction to reduce hydrogen sulfide in the sent sludge, and controlling the concentration of hydrogen sulfide in the sewage treatment plant in accordance with a signal from the hydrogen sulfide reduction instruction means Means for controlling the concentration of hydrogen sulfide, means for monitoring the phosphorus concentration of sludge in the return pipe, and when the phosphorus concentration monitored by the means for monitoring phosphorus concentration exceeds a set value, the sludge concentration treatment plant On the other hand, there are provided phosphorus reduction instruction means for transmitting a phosphorus reduction instruction in the discharged sludge desorbed liquid, and phosphorus concentration control means for controlling the phosphorus concentration in the sludge concentration treatment plant according to a signal from the phosphorus reduction instruction means. A sludge intensive treatment system characterized by the following. 7. At least one of the hydrogen sulfide concentration monitoring means, the hydrogen sulfide reduction instruction means, and the hydrogen sulfide concentration control means performs communication using an optical fiber laid in the mud pipe. The sludge concentration processing system according to claim 1, 2, 5, or 6, wherein 8. At least one of said phosphorus concentration monitoring means, said phosphorus reduction instruction means and said phosphorus concentration control means.
The third is that communication is performed using an optical fiber laid on the return pipe, wherein:
7. The sludge intensive treatment system according to 4, 5, or 6.