JPH08206638A - Pretreatment of excretion treatment facilities - Google Patents

Abstract

PURPOSE: To dispense with the periodic cleaning work of a receiving tank becoming the most disliked on-the-spot work in an excretion treatment plant and to perfectly automate the washing and removing work of settled sand performed periodically. CONSTITUTION: Excretion is passed through a mechanical separator 4 without being directly introduced into a receiving tank 6 to separate impurities and, thereafter, the separated excretion is sent to the receiving tank 6 while the separated impurities are sent to a drum screen 12 and a screw press 13. In this case, an opening and closing valve 701 is disposed on the line 7 sending the separated excretion to the receiving tank 6 and an opening and closing valve 111 is disposed on the line 11 sending the impurities to the screen 12. The opening and closing valves 701, 111 are reversely operated in synchronous relationship so as to be oppositely opened and closed and the push-out pressure force of a fecal tank lorry 1 is utilized to separate excretion and impurities under pressure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is capable of removing impurities without directly handling human waste when removing various impurities present in human waste, which is the purpose of pretreatment in human waste treatment facilities.
The present invention relates to a pretreatment method for a human waste treatment facility which is excellent in workability and hygiene.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 2, human waste transported by a vacuum vehicle 50 is an underground sand settling tank 51.
The large amount of sand and gravel that have been settled are removed by sedimentation, and human waste containing impurities (sand, paper, rubber, etc.) that do not settle overflows from the sand settling tank 51 and enters the receiving tank 52. The human waste in the receiving tank 52 is crushed by the crushing pump 53 and the drum screen 54.
Then, it is sent to the screw press 55 to remove contaminants, sent to the flow rate adjusting tank 56, sent to a night soil treatment facility (not shown), and subjected to treatment such as biological treatment.

At this time, the sand settling tank 51 requires periodic cleaning of large settling sand and gravel, but since it is an underground type, cleaning is complicated and unhygienic, and it is most disliked as field work.

Further, when the human waste in the receiving tank 52 is sent to the drum screen 54, a special pump called a crushing pump is required, which not only increases the cost but also the crushing pump regularly grinds the rotary blades. There is a problem in that work cost is required because work and replacement work of the rotary blade are required.
Further, in order to prevent the operation from being stopped during the polishing work of the rotary blade and the replacement work of the rotary blade, it is necessary to prepare and place a spare crushing pump, which causes a problem of high cost.

[0005]

Therefore, the present invention eliminates the need for periodic cleaning work of the receiving tank, which is the most disliked work in the night soil treatment plant, and fully automates the periodic cleaning and removing work of sediments. By doing so, there is no need to handle filth, there is no need for a crushing pump, and the work of polishing the rotary blade of the crushing pump and replacing the rotary blade, which was performed as a regular work, is no longer required, and the work is reduced. It is an object of the present invention to provide a pretreatment method for a human waste treatment facility that can reduce the cost.

[0006]

[Means for Solving the Problems] A pretreatment method for a human waste treatment facility that can achieve the above object is to receive and store raw urine from a vacuum truck or human sewage composed of septic tank sludge, and quantitatively transfer the human urine. In a human waste treatment facility for biological treatment by separating the contaminants via a mechanical separation device without directly receiving the human waste into the receiving tank, the separated and sending the urine to the receiving tank and separating the separated contaminants. Characterized by feeding to a drum screen and a screw press.

Further, a pretreatment method for a human waste treatment facility that can achieve the above object is to receive and store raw urine from a vacuum truck or human sewage consisting of septic tank sludge, and to quantitatively feed the human urine for biological treatment. In the processing facility, the above-mentioned human waste is not directly received in the receiving tank, but the impurities are separated via a mechanical separation device, and then the separated urine is sent to the receiving tank and the separated impurities are drum screen and screw press. At the time of sending to the receiving tank, an opening / closing valve A is provided in the line for separating and sending the urine to the receiving tank, and an opening / closing valve B is provided in the line for sending the contaminants to the drum screen, so that the opening / closing valve A and the opening / closing valve B are opened and closed mutually. Are synchronized with each other in the opposite direction and reversely operated, and are separated under pressure using a pushing force of a vacuum vehicle to separate into urine and impurities.

In a preferred embodiment of the present invention, raw urine or septic tank sludge is separately received, passed through a mechanical separating device, and then received in each receiving tank or the same receiving tank.

In another preferred embodiment, a large, hard and heavy foreign matter such as stones, iron scraps, coins, etc. remaining in the main body of the mechanical separation device by the separation operation of the mechanical separation device,
Uncleaning is performed automatically every 1 week to 10 days, and after repeatedly washing until it becomes clean, it is taken out of the system.

In the present invention, the human waste treatment facility may be a facility that receives and treats only raw urine, but may be a facility that receives and treats septic tank sludge in addition to raw urine. The septic tank sludge is sludge in a domestic septic tank or a combined septic tank that is performing biological treatment, and surplus sludge generated in the septic tank is common.

In the present specification, unless the raw urine and the septic tank sludge cannot be understood without distinguishing them, they are referred to as "human waste" without distinguishing them.

A human waste treatment facility is generally provided with a reaction tank for biologically treating urine and a solid-liquid separation means, and recently, a membrane treatment has been adopted as the solid-liquid separation means, but it is not particularly limited. Not done. When treating raw urine and septic tank sludge in a urine treatment facility, a flow rate adjusting tank is provided to supply a fixed amount to the reaction tank.

Therefore, in the present invention, the pretreatment facility is a facility provided in a treatment process prior to the flow rate adjusting tank, and refers to a facility for removing impurities. In the process of supplying urine from the flow rate adjusting tank to the reaction tank, centrifugal separation means for removing fine sand may be added, but this centrifugal separation means is used after the pretreatment method of the present invention. It can also be added to the process.

[0014]

In the present invention, the contaminants are separated from the vacuum car without directly receiving the human waste into the receiving tank through the mechanical separating device, and then the separated urine is sent to the receiving tank and the separated foreign matter is removed. Since it is sent to the drum screen and the screw press, the periodical cleaning work of the receiving tank, which is the most disliked work at the night soil treatment plant, becomes unnecessary. Further, since the above separating device is used, it is possible to completely automate the washing and removing work of the sediment, which is regularly performed, whereby the site for handling the waste is eliminated. Furthermore, the conventional crushing pump is not required, and the grinding work of the crushing rotary blade of the crushing pump and the replacement work of the rotary blade, which were performed as regular work, become unnecessary, and the work can be reduced, and the cost can be reduced. Becomes

Further, after the urine is not directly received in the receiving tank and the impurities are separated through a mechanical separating device, the separated urine is sent to the receiving tank and the separated impurities are transferred to a drum screen and a screw press. At the time of sending, an opening / closing valve A is provided in a line for separating and sending urine to a receiving tank, and an opening / closing valve B is provided in a line for sending contaminants to a drum screen so that the opening / closing valve A and the opening / closing valve B are opened and closed with each other. On the contrary, the urine and the contaminants are synchronized with each other, and the urine and the contaminants are separated under pressure by using the pushing force of the vacuum car to separate the urine and the contaminants. It is effective for realization.

Further, by accepting raw urine or septic tank sludge separately and passing through a mechanical separation device, and then receiving them in each receiving tank or the same receiving tank, even if the number of kinds of urine received increases, the above-mentioned purpose Can be accepted while achieving.

Further, by the separation operation of the mechanical separation device, stones, iron scraps, coins and other large, hard and heavy contaminants remaining in the main body of the device are automatically washed unattended every one week to ten days. However, by repeatedly washing the product until it becomes clean, and taking it out of the system, it is possible to not only achieve the above objectives more effectively, but also it excels in work hygiene, and is suitable for field workers when it is discharged from the system. I don't dislike it.

[0018]

Embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited to the embodiments.

FIG. 1 is a flow chart showing an example of the pretreatment method of the night soil treatment facility of the present invention. In the figure, 1 is a vacuum truck for carrying raw urine and septic tank sludge. Reference numeral 2 is a supply pipe for supplying raw urine to the mechanical separation device 4, and 3 is a supply pipe for supplying septic tank sludge to the separation device 4. In this embodiment, raw urine pipe 2
Although the two lines of the pipe 3 for septic tank sludge and the line 3 are separately provided, it is also possible to provide only one line for common use.

Vacuum pipe junctions 201 and 301 are provided at one ends of the pipes 2 and 3, respectively. The pipe 2 has an on-off valve 202, a sight glass 203, and the pipe 3 has an on-off valve 302 and a site. Each glass 303 is provided. Drain valves 204 and 304 are provided in the pipes 2 and 3, respectively.

The mechanical separation device 4 is a device for receiving raw urine and septic tank sludge and separating impurities under pressure. The separating device 4 is provided with a discharge part 402 on the lower side of the main body 401 of the internal cavity, and a screen 403 is provided at the entrance of the discharge part 402.
A stirring blade 404 is provided in front of. 405 is a sight glass, and 406 is a liquid level gauge. In this embodiment, since the diaphragm type liquid level gauge is used, the main valve 407 for protecting the diaphragm under pressure is provided.

Since the main body 401 is under pressure, it preferably has pressure resistance. It is necessary that the screen 403 has an opening capable of separating impurities, and
It is preferable to have an opening in the range of 2 to 2 mm. In this embodiment, slits in the vertical direction (slit width 0.
Although a screen having a size of 1 mm) is used, the orientation of the slit is not limited, and a punching hole may be used instead of the slit. The stirring blade 404 is for preventing foreign matters from clogging the screen 403, and it is preferable to continuously stir or scrape the surface of the screen 403. The stirring blade may be configured like a blade and moved up and down along the eyes of the screen, or the blade may be rotated on the surface of the screen.
Alternatively, a comb may be inserted in the screen and moved up and down without using the stirring blade.

A discharge pipe 5 for separating raw urine or septic tank sludge is connected to the discharge section 402, and the discharge pipe 5 is a raw urine pipe 7 for separating raw urine and sending it to the urine receiving tank 6.
It is branched to a septic tank sludge pipe 9 for sending the separation septic tank sludge to the septic tank sludge receiving tank 8. The discharge pipe 5 has an on-off valve 5
01, an open / close valve 701 is provided in the raw urine pipe 7, and an open / close valve 901 is provided in the septic tank sludge pipe 9.

Reference numeral 10 is a pipe for supplying washing water to the screen 403 of the separating device 4, and the pipe has an opening / closing valve 1
01 is provided. When this cleaning water is supplied into the main body 401, the separation operation of the separation device 4 causes the main body 401.
Large, hard and heavy contaminants such as stones, iron scraps, and coins remaining inside are cleaned. In this embodiment, 1 week to 10
Automatically cleans every day and repeats until clean. When removing the impurities in the main body 401 after cleaning from the system, it can be automatically carried out and incinerated by an automation device (not shown), but since it is cleaned by cleaning, it can be used by field workers. It can be done manually without being disliked.

In the present embodiment, it is preferable that the cleaning water is supplied from the back side of the screen because it is possible to remove impurities clogging the screen.

Reference numeral 11 is a pipe for transferring the impurities separated by the screen 403 to the drum screen 12, and an on-off valve 111 is provided.

The drum screen 12 has a function of separating foreign matters such as paper, fibers, rubber, etc. The separated foreign matters are sent to the screw press 13 and dehydrated, and sent to an incinerator (not shown) by the conveyor 14. It is incinerated and incinerated.

Reference numeral 121 is a pipe for supplying washing water to the drum screen 12, and an opening / closing valve 122 is provided.
Reference numeral 131 is a pipe for supplying washing water to the screw press 13, and an opening / closing valve 132 is provided. Wastewater and cleaning wastewater separated by the drum screen 12 are sent to the urine receiving tank 6 through the pipes 123 and 124, and the filtrate and cleaning wastewater similarly dehydrated by the screw press 13 are also passed through the pipes 133 and 124. And sent to fresh urine receiving tank 6. Reference numeral 125 is an on-off valve.

When the septic tank sludge is received, it is a pipe for sending the waste water separated by the drum screen 12, the cleaning waste water, or the filtrate and the cleaning waste water dehydrated by the screw press 13 to the septic tank sludge receiving tank 8. 1
An on-off valve 35 is provided in the pipe 134.

Reference numeral 15 is a live urine delivery pump for supplying live urine in the live urine receiving tank 6 to a raw urine processing facility, and 16
Is a septic tank sludge feed pump for supplying the septic tank sludge in the septic tank sludge receiving tank 8 to the urine treatment facility.

The septic tank sludge feed pump 16 is provided in the main body 401 when the raw urine of the vacuum car 1 or the septic tank sludge is completely supplied.
In order to prevent the inside of the container from being concentrated by the residue, it can be used as a pump for supplying the liquid in the septic tank sludge receiving tank 8 to the main body 401, but a separate supply pump may be provided.

Reference numeral 161 is a pipe for supplying the liquid in the septic tank sludge receiving tank 8 to the main body 401, and an opening / closing valve 162 is provided.

Next, the pretreatment method of the present invention will be described in detail. In this embodiment, all the on-off valves are configured to be automatically opened / closed by a timer or other signals, and all devices are configured to be able to be driven and stopped automatically or manually in a control room (not shown). ing. The control room is equipped with a urine selection button that allows the selection of raw urine and septic tank sludge to be selected.

Acceptance of live urine will be described as a typical example. First, the drum screen 12, the screw press 13, and the conveyor 14 are driven. On-off valve 11
1. The open / close valve 501 is fully opened at the start. Further, the open / close valve 901 is closed.

The vacuum truck 1 which has completed the weighing on the truck scale enters a receiving chamber (not shown) and stops at a predetermined position. Then, the discharge hose of the vacuum vehicle 1 is connected to the junction 201. After driving the vacuum pump of the vacuum car 1, press the "live urine" selection button. As a result, the on-off valve 202 and the on-off valve 701 are opened, the supply of raw urine is started, and the stirring blade 404 of the separation device 4 is started. At this time, the open / close valve 111 is closed.

In this embodiment, when the fresh urine is put into the separating device 4, the pushing pressure force by the pump pressure of the vacuum car 1 is used. The separation device 4 is filled with fresh urine and is in a pressurized state. By applying such a pressurized state, the separation of contaminants becomes easy and automation becomes possible. A suction pump can be separately provided to create the pressurized state, instead of the discharge pump of the vacuum vehicle 1. This is especially effective when the discharge pressure of the discharge pump of the vacuum vehicle 1 is insufficient.

The inside of the main body 401 of the separating apparatus 4 is in a pressurized state, and after a lapse of a predetermined time from the start of charging, preferably 2 minutes later
The on-off valve 701 is closed and the on-off valve 111 is opened. This state is maintained for a predetermined time, preferably 1 minute, and the on-off valve 7 is turned on again.
01 is opened and the on-off valve 111 is closed. Next, this operation is repeated in a time cycle of 2 minutes-1 minute-2 minutes-1 minute ... In this way, by opening and closing the on-off valve 701 and the on-off valve 111 in reverse, the separation can be automated.

In the present invention, the reverse operation control of the on-off valve according to such a time cycle is expressed as "synchronization".

In the above embodiment, the on-off valve 701 and the on-off valve 11
Although the opening / closing control of No. 1 is performed by the reverse operation of full opening and full closing, the following method is also preferable. That is, the inside of the main body 401 of the separation device 4 is in a pressurized state, and after a lapse of a predetermined time, preferably 2 minutes after the start of charging, the opening / closing valve 701 is changed from 100% opening to 20% opening and the opening / closing valve 111 is opened. To do. This state is maintained for a predetermined time, preferably 1 minute, and the on-off valve 701 is again opened.
Is changed from 20% to 100% and the on-off valve 111 is closed. Next, perform this operation for 2 minutes-1 minute-2 minutes-1 minute ...
・ Repeat in the time cycle.

The reason why the opening degree of the on-off valve 701 is kept at 20% even in the closed state is as follows. That is, since the operation of the separation device is performed under pressure, when the on-off valve 111 that opens and closes in synchronization with the on-off valve 701 does not open due to a sequence failure or the like,
It cannot be said that a completely closed system is formed, and there is no risk that a weak portion of the charging line will rupture or the hose will come off. To prevent these,
It is preferable to provide a relief of about 20% as described above.

Sight glass 20 provided in the charging pipe 2
3, the open / close valve 202 is closed by a button operation when the flow of live urine disappears, and after a predetermined time, preferably 1 minute,
The on-off valve 701 is closed. At this time, it is preferable to reversely operate the discharge pump of the vacuum vehicle 1 to suck the residual raw urine at the hose joint. Next, the discharge hose of the vacuum vehicle 1 is removed from the junction 201 and the room is exited.

At the completion of loading the vacuum vehicle 1, the main body 40
In order to prevent the inside of No. 1 from condensing with residue, the on-off valve 162 is opened regularly (usually every evening in the evening), and
To supply the liquid in the septic tank sludge receiving tank to the main body 401. About 5 minutes is preferable for this work.

After or at the same time as this work, the on-off valve 122 and the on-off valve 132 are opened, and preferably the drum screen 12 and the screw press 13 are washed for 2 minutes.

Raw urine can be received as described above, but septic tank sludge can also be received in the same manner. However, it is natural to use the open / close valve for receiving septic tank sludge.

Next, the cleaning and taking-out work of the internal stagnant material in the separator will be described. Due to the separating operation of the mechanical separating device 4, large hard and heavy impurities such as stones, iron scraps and coins remain in the main body 401 of the device 4. The residue is automatically washed every week to 10 days unattended and repeatedly washed until it becomes clean.

First, the main valve 4 of the liquid level gauge 406 of the separation device 4
Open 07. Next, the on-off valves 501 and 701 are opened and drained out. Next, when the liquid level gauge 406 reaches a predetermined lower limit, the on-off valves 501 and 701 are closed. Next, the on-off valve 10
1 is fully opened, and washing water is filled up to a predetermined upper limit in the main body 401. Next, the stirring blade 404 is driven for 5 minutes. afterwards,
The on-off valves 501 and 701 are opened and drained out.

The above operation is repeated at least twice to wash the retentate. Next, a hand hole (not shown) provided in the main body 401 is opened to discharge the internal retention material. When the drainage is completed, close the handhole and store the wash water to fill it.

When the internal retentate is taken out of the system,
It can be automatically carried out by an automated device (not shown) and incinerated, but since it has been cleaned by the above cleaning,
It can be done manually without being disliked by field workers.

As the washing water in the above embodiments, tap water, human waste treated water (which may be secondary treated or tertiary treated), industrial water, etc. may be used.

[0050]

EFFECTS OF THE INVENTION According to the present invention, the regular cleaning work of the receiving tank which is the most disliked work in the night soil treatment plant becomes unnecessary, and the crushing pump is not required. Since the work of polishing the rotary blade and the work of replacing the rotary blade are not required, the work can be reduced and the cost can be reduced.

Further, it becomes possible to completely automate the washing and removing work of the sediment, which is carried out regularly, so that there is no site for handling the waste, and the workability and hygiene are further improved.

[Brief description of drawings]

FIG. 1 is a flow chart showing an embodiment of the present invention.

FIG. 2 is a flowchart showing a conventional example.

[Explanation of symbols]

 1: Vacuum car 2: Injection pipe 201: Vacuum car junction 202: Open / close valve 203: Sight glass 204: Drain valve 3: Injection pipe 301: Vacuum car junction 302: Open / close valve 303: Sight glass 304: Drain valve 4: Mechanical separation device 401: Main body 402: Discharge unit 403: Screen 404: Stirring blade 405: Sight glass 406: Liquid level gauge 407: Main valve 5: Discharge pipe 501: Open / close valve 6: Live urine receiving tank 7: Live urine pipe 701: Open / close valve 8: Septic tank sludge receiving tank 9: Septic tank sludge piping 901: Open / close valve 10: Piping 101: Open / close valve 11: Piping 111: Open / close valve 12: Drum screen 121: Piping 122: Open / close valve 123: Piping 124: Piping 125: on-off valve 13: screw press 131: piping 132: on-off valve 1 33: Piping 134: Piping 135: Open / close valve 14: Conveyor 15: Live urine liquid feed pump 16: Septic tank sludge liquid feed pump 161: Pipe 162: Open / close valve

Claims (4)

[Claims] 1. A human waste treatment facility for receiving and storing fresh urine from a vacuum truck or human sewage consisting of septic tank sludge, and quantitatively sending the human urine for biological treatment without directly receiving the human urine into the receiving tank. A method for pretreatment of a waste urine treatment facility, which comprises separating contaminants via a mechanical separator, feeding the separated urine to a receiving tank, and feeding the separated contaminants to a drum screen and a screw press. . 2. In a human waste treatment facility for receiving and storing fresh urine from a vacuum truck or human waste composed of septic tank sludge, and quantitatively sending the human urine to perform biological treatment, the human urine is not directly received in the receiving tank. After separating the contaminants via a mechanical separation device, separate and send the urine to the receiving tank, and also separate the urine to the receiving tank when sending the separated contaminants to the drum screen and screw press. An on-off valve A is provided on the line, and an on-off valve B is provided on the line for feeding contaminants to the drum screen, so that the on-off valve A and the on-off valve B are opened and closed in the opposite direction and the reverse operation is performed, and the vacuum vehicle is pushed out. A pretreatment method for a human waste treatment facility, characterized in that it is separated under pressure using a pressurizing force to separate into urine and impurities. 3. The human waste treatment facility according to claim 1 or 2, wherein the raw sewage or the septic tank sludge is separately received and passed through a mechanical separation device before being received in each receiving tank or the same receiving tank. Pretreatment method. 4. A hard and heavy foreign substance such as stones, iron scraps, coins, etc. remaining in the main body of the mechanical separating device is automatically and automatically left unattended every one week to ten days. The pretreatment method for a urine treatment facility according to claim 1, 2 or 3, wherein the pretreatment method is performed after washing and repeatedly washing until it becomes clean.