JP2000157992A - Batch-operated sludge treating device controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a batch-operated controller capable of setting an optimum process for each of sewages different in influent matter composition, capable of being changed even during the operation, and further capable of indicating the elapsed time during operation. SOLUTION: Sewage is supplied to plural batch tanks 12 and 13 mutually differently in time, the sewage is aerated, agitated and settled, the treated water is discharged through a disinfection tank 33, and the settled sludge is stored in a sludge storage tank 27 through a sludge concentration tank 25 in this batch-operated sludge treating device 37. A batch controller 40 is formed by the touch panel 38 provided with a setting means 38a for setting the operation mode, cycle time, etc., and optimally setting or changing the various processes time, etc., for every batch tank of the plural batch tanks 12 and 13 and an indicator means 38b for indicating the process monitor, elapsed time, etc., for each of the tanks 12 and 13 and a control means 39 for receiving the data from the treating device 37 and the set input from the setting means 38a and outputting an automatic control and an indication.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a batch-type sludge treatment control apparatus having a plurality of batch tanks and capable of setting an optimum treatment step and displaying a process monitor. is there.

[0002]

2. Description of the Related Art As a conventional batch-type sludge treatment apparatus, for example, as shown in Japanese Patent Publication No. 4-42078, a batch treatment tank, an aeration stirrer, an oxidation-reduction potential indicating controller, a supernatant water discharger, a sludge extraction pump. In a batch-type sludge treatment apparatus, wherein each step of an intermittent aeration step of performing aeration while continuously inflowing sewage, a settling step and a step of discharging supernatant water is sequentially performed as one cycle in a single treatment tank, The intermittent aeration operation is performed by detecting the oxidation-reduction potential of the wastewater in the intermittent aeration step, supplying the oxygen-containing gas at a preset lower limit, and stopping the supply of the oxygen-containing gas at a preset upper limit. At that time, the set value of the upper or lower limit of the oxidation-reduction potential is set to be high at a low temperature corresponding to the temperature of the sewage and set low at a high temperature corresponding to the temperature of the sewage. BOD in, nitrogen, there are things you as phosphorus in a stable manner can be removed.

As a batch type sludge treatment control device, for example, as shown in Japanese Patent Application Laid-Open No. 7-232190, there is provided a water level meter for setting a predetermined amount of inflow of sewage supplied to a batch tank into a plurality of batch tanks. Sewage is supplied from the inflow pump tank to the multiple batch tanks at different times, and the wastewater is aerated, stirred and settled in the multiple batch tanks, and the treated water treated in the multiple batch tanks is disinfected in common. In a batch-type sludge treatment device that discharges through a tank, a COD measuring device for treated water is provided in a disinfection tank or a discharge channel of treated water, and outputs of each water level meter of a plurality of batching tanks and outputs of the COD measuring device. Is provided, and the COD emission per 24 hours of the treated water discharged through the disinfection tank is calculated by this calculator, and the number of expensive flow rate indicator integrators is reduced, and the COD value is reduced. By air for aeration Etc. to adjust the amount of volume and return sludge, there is that to be able to maintain good operating condition.

[0004]

In the former conventional example, 1
BO in wastewater by measuring oxidation-reduction potential in only two batch tanks
It is intended to stably remove D, nitrogen, and phosphorus. Although some consideration is given to the temperature, it cannot cope with multiple wastewater systems, and there is no means for displaying the treatment status. There is a problem that the situation cannot be determined by the display, and there is no means for inputting the processing condition.

[0005] On the other hand, in the latter conventional example, the amount of air for aeration and the amount of returned sludge can be adjusted by a COD value for a plurality of batch tanks. There is a problem that it is not possible to judge the situation by the display, and there is no means for inputting the processing conditions, and the processing conditions cannot be changed during the operation, so that the change cannot be input.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a method for treating wastewater having different inflowing substance components.
It is a batch controller that can set the optimal processing steps, change the settings during the operation, and display the elapsed time.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention comprises a batch tank, an aeration stirrer, a supernatant water discharger, and a sludge withdrawing pump. In a batch type sludge treatment apparatus in which each step of the supernatant water discharge step is sequentially performed as one cycle in a single treatment tank, selection of the operation method and cycle time of a batch type sludge treatment apparatus having a plurality of batch tanks and multiple batches Touch panel with setting means for arbitrarily setting and changing settings such as various process times for each tank, and display means for providing a color display with good visual confirmation of the process monitor and intermediate elapsed time for each of a plurality of batch tanks And a control means for receiving automatic data output from the batch-type sludge treatment apparatus and setting input from the setting means and outputting automatically to the batch-type sludge treatment apparatus and display output to the display means. It was.

[0008] The batch type sludge treatment control apparatus configured as described above supplies sewage to a plurality of batch tanks at different times, aeration, agitation, and sedimentation of the sewage in the plurality of batch tanks, and a plurality of batch tanks. Treated water treated in the tank is discharged through a disinfection tank, and the sludge settled in multiple batch tanks is stored in a sludge storage tank through a sludge concentration tank. Cycle time selection and multiple batch tanks, respectively, set the optimal process time for the inflow process, aeration process, sedimentation process, and supernatant water discharge process, etc. Can be changed, and a process monitor and a color display with good visual confirmation of the elapsed time, etc. are performed for each of a plurality of batch tanks, so that the progress of the process can be grasped.

Further, a DO meter for detecting the DO value of each of the plurality of batch tanks and inputting the DO value to the control means is provided in a plurality of batch tanks, and a batch tank blower for sending air to each of the plurality of aeration agitators is provided. If the air volume of each batch tank blower is adjusted by PID control so that the DO value set on the touch panel based on the detection value of each DO meter is obtained, the DO value becomes more stable.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will now be described with reference to FIGS.
This will be described with reference to FIGS. FIG. 1 is a system configuration diagram showing a configuration and a flow of a batch type sludge treatment control device according to an embodiment of the present invention, FIG. 2 is a block circuit diagram of the batch type sludge treatment control device, and FIG. FIG. 4 is an example of a process time setting screen on a touch panel of the batch controller, FIG. 5 is an example of a process monitor screen, and FIG. 6 is an example of a process monitor screen. It is an example of a detail screen.

In FIG. 1 and FIG. 2, an inflow pump 2 for pumping raw sewage flowing into an inflow pump tank 1 is provided, and the pumped sewage raw water passes through a screen unit 3 and is further blown by a blower 4 for aeration and sedimentation. It is connected so as to be supplied to and stored in a flow control tank 6 via an aerated sedimentation tank 5 to be evacuated, and an underwater stirring pump 7 for stirring sewage and a flow control pump 8 for pumping up sewage are provided in the flow control tank 6 to measure sewage. The tank 9 is connected via the No. 1 sewage switching valve 10 and the No. 2 sewage switching valve 11 to the No. 1 batch tank 12 and the No. 2 batch tank 13 so as to be supplied with a time delay. No1 batch tank 12,
And the No. 1 aeration stirrer 1 that can simultaneously and individually perform aeration and agitation at the bottom of the No. 2 batch tank 13.
No. 4 and No. 2 aeration stirring device 15 are provided.
1 aeration stirrer 14 and No2 aeration stirrer 15
The No. 1 batch tank air diffuser valve 18 and the No. 2 batch tank air diffuser valve 19 for switching air from the No. 1 batch tank blower 16 and the No. 2 batch tank blower 17 to perform aeration respectively, and further connected to the No. 1 batch tank 12, And No. 1 for detecting the respective DO values (dissolved oxygen concentration) in the tank of the No. 2 batch tank 13
A DO meter 20 and a No2DO meter 21 are provided.

Also, a No. 1 sludge pulling pump 22 and a No. 2 sludge pulling pump 23 are provided at the bottom, respectively. The sludge deposited in the tank 12 and the No. 2 batch tank 13 is pulled out and sent, and the sludge concentrated in the sludge concentration tank 25 is discharged and stored in the sludge storage tank 27 by the sludge supply pump 26, and further the No. 1 batch tank 12 and No2
N detecting the level of sludge in the batch tank 13
An o1 interface meter 28 and a No2 interface meter 29 are provided.

Further, a No. 1 supernatant water discharge device 30 and a No. 2 supernatant water discharge device 31 are provided above the No. 1 batch tank 12 and the No. 2 batch tank 13, respectively. The supernatant water is sent to a disinfection tank 33 via a sprinkling pump tank 32, where it is disinfected and then discharged. In the same manner, No. 1 watering valve 3
4 and a No. 2 watering valve 35 are provided, and the supernatant water sent from the watering pump 36 in the watering pump tank 32 is sprayed to the No. 1 batch tank 12 and the No. 2 batch tank 13, respectively. The batch type sludge treatment device 37 is configured as described above.

On the other hand, the operation method of the batch type sludge treatment device 37 such as automatic or manual operation, the selection of the cycle time of 6 hours or 8 hours, the inflow into the No. 1 batch tank 12 and the No. 2 batch tank 13, aeration stirring, stirring , Set various process times such as sedimentation, discharge, diffuser valves 18, 19, sludge extraction pumps 22, 23,
A setting unit 38a for arbitrarily setting the operation time of various devices such as the watering valves 34 and 35, setting of a DO value, and changing these settings; a setting screen for setting operation by the setting unit 38a; And a touch panel 38 provided with a display means 38b capable of color display of a process monitor screen such as an elapsed time and a device operation time for each of the No. 2 batch tanks 13 with good visual confirmation, and data from a batch type sludge treatment device 37. The batch controller 40 is constituted by a control means 39 which receives a setting input from the setting means 38a and outputs an automatic control to various devices of the batch type sludge treatment apparatus 37 and a display output to the display means 38b.

Flow control pump 8, No. 1 sewage switching valve 1
0, No2 sewage switching valve 11, No1 aeration stirrer 1
4, No. 2 aeration stirrer 15, No. 1 batch tank blower 1
6, No 2 batch tank blower 17, No 1 batch tank air diffuser 1
8, No2 batch tank air diffuser valve 19, No1 DO meter 20, No2 DO meter 21, No1 sludge extraction pump 22, No2
The sludge extraction pump 23, the desorption liquid discharge valve 24, the No. 1 supernatant water discharge device 30, the No. 2 supernatant water discharge device 31, the No. 1 water spray valve, the No. 2 water spray valve 35, and the water spray pump are connected to the batch controller 40 (indicated by *). ), And a time schedule operation is performed as shown in FIG.
Further, the control unit 39 is a setting unit 3 on the touch panel 38.
8a so that the respective DO values are set to the respective DO values.
PID control of the respective batch tank blowers 16 and 17 is performed based on the DO values detected by the totals 20 and 21. The operating time of the inflow pump 2, the aeration sedimentation blower 4, the underwater stirring pump 7, and the sludge supply pump 26 is separately set in an internal timer.

In the time schedule of the batch controller 40 shown in FIG. 3, the cycle time to which is one cycle of the batch tank can be set to 6 hours or 8 hours by the setting means 38a of the touch panel 38.
From 1 to t10, the setting means 38a can arbitrarily set and change the process time for each of the plurality of No. 1 batch tanks 12 and No. 2 batch tanks 13. Fixed times T1 to T3 (for example, T1 = 10 min, T2 =
5min, T3 = 5min,) is set in the internal timer.

FIG. 4 shows a display means 38b of the touch panel 38.
Is a setting screen for the setting means 38a shown in FIG. 1, for example, an example of the No. 1 batch tank process time setting screen is shown below. The inflow process time (1 ≦ t1 ≦ 2Hr) is the No. 1 sewage switching valve 10
Opening time is usually 2 hours. Aeration stirring process time (1 ≦ t2
≦ to / 2Hr) is the operation time of the No. 1 aeration stirrer 14 and is standard for 3 hours regardless of the cycle time. The stirring time (0 ≦ t3 ≦ 1Hr) is the anaerobic stirring time in the aeration stirring process time, and is the closing time of the No. 1 batch tank diffusion valve 18. The aeration agitation time (0.5 ≦ t4 ≦ 1 Hr) is the anaerobic-aerobic aeration time in the aeration agitation step time, and is the opening time of the No. 1 tank aeration valve 18. The precipitation time (1 ≦ t5 ≦ 2Hr)
Usually it cannot be set in the settling time. Watering start time (3 ≦
(t6 ≦ 8 min) is the time from the start of the discharging process to the start of watering. The watering time (0 ≦ t7 ≦ 10 min) is a time set according to the scum generation state in order to remove scum around the supernatant water discharging device.

The sludge removal time (0 ≦ t8 ≦ 5 min)
The time to pull out the sludge from the No. 1 batch tank 12 to the sludge concentration tank 25 is set by the MLSS concentration in the No. 1 batch tank 12. The concentrated sludge withdrawal time (0 ≦ t9 ≦ 120 min) is set by the sludge concentration from the sludge withdrawal time from the sludge concentration tank 25. The opening time of the desorbed liquid discharge valve (0 ≦ t10 ≦ 5 min) is the time for opening and closing the desorbed liquid discharge valve 24 and returning the desorbed liquid from the sludge concentration tank 25 to the flow rate adjusting tank 6 before the operation of the sludge extraction pump. Usually 5 minutes. The DO set value (0.0 to 10 PPM) is the set DO value at the time of aeration and stirring of the No. 1 batch tank 12 and is set to No at the DO value.
The one-time tank blower 16 is subjected to inverter PID control. During the aeration start time (1 to 9 hours), in the step mode, agitation-aeration agitation is performed alternately for 15 minutes × 2 times for a total of 1 hour in order to protect the activated sludge in the batch tank. The same applies to the No. 2 tank process time setting screen.

FIG. 5 shows an example of a process monitor screen similarly displayed on the display means 38b of the touch panel 38. There are also a No. 1 batch tank, a No. 2 batch tank, respective process monitor detail screens, and the like. FIG. 6 shows an example of a process monitor detail screen of the No. 1 batch tank.

The operation of this embodiment having the above configuration will be described below. The batch controller 40 uses the setting means 38a to select an operation method and a cycle time, and to set an optimal process time of an inflow process, an aeration agitation process, a settling process, and a supernatant water discharge process, etc., in accordance with sewage having different inflow substance components by the setting means 38a. Based on the set time schedule, the control means 39 automatically operates the batch-type sludge treatment apparatus 37, and first shifts the time from the inflow pump tank 1 to the No. 1 batch tank 12 to the No. 1 batch tank 12 through the flow rate adjustment tank 6 with the No. 2 batch tank 13. Supply sewage, No1 batch tank 12
On the side, air from the No. 1 batch tank blower 16 is switched by the No. 1 batch tank air diffuser valve 18 and the No. 1 batch tank 12
The aeration of the aeration and agitation process is performed within the tank, and the DO value (dissolved oxygen concentration) detected by the No. 1 DO meter 20 provided in the tank of the No. 1 batch tank 12 is adjusted to each DO value set by the setting means 38a. No. 1 batch tank blower 16
, The wastewater treatment can be performed with a stable DO value.

The sewage is aerated, stirred and settled, and the resulting supernatant water is sent to the water spray pump tank 32 by the No. 1 supernatant water discharger 30 and discharged through the disinfection tank 33. Also,
Sludge settled at the bottom of the No. 1 batch tank 12 is drawn out by a No. 1 sludge pulling pump 22, stored in a sludge storage tank 27 via a sludge concentration tank 25, and carried out when a predetermined amount is accumulated. Also, N
The same processing can be performed in the two-time batch tank 13 with a time lag.

Therefore, according to the sewage having different inflowing material components, the operation method and the cycle time can be selected and the plurality of batch tanks 1 can be selected.
In steps 2 and 13, respectively, set the optimal process time for the inflow step, aeration step, sedimentation step, and supernatant water discharge step, etc., and perform automatic operation. The set values can be changed even during automatic operation.
In addition, the setting means 38a can change the set value even during the automatic operation, and the control means 39 displays the process monitor, the elapsed time, etc. for each of the plurality of batch tanks 12 and 13 in a color display with good visual confirmation, so that You can grasp the progress of the process.

[0023]

According to the present invention, there is provided a batch type sludge treatment apparatus in which each step is sequentially performed as one cycle in a single processing tank. The batch type sludge treatment apparatus includes a plurality of batch tanks, and selects an operation method and cycle time. A setting means for arbitrarily setting and changing various process times and the like for each of a plurality of batch tanks, and a display means for displaying a process monitor and an elapsed time and the like for each of a plurality of batch tanks with good visual confirmation. A batch controller was constituted by a touch panel provided and control means for receiving data from the batch type sludge treatment apparatus and setting input from the setting means, and performing automatic control output to the batch type sludge treatment apparatus and display output to the display means. From the inflow pump tank, sewage is supplied at different times to a plurality of batch tanks, and aeration, agitation, and sedimentation of the sewage are performed in the plurality of batch tanks. The sludge settled in multiple batch tanks can be stored in a sludge storage tank through a sludge concentration tank, and the operation method and cycle time can be selected according to the wastewater with different inflowing substance components. It is possible to set the optimal process time of the inflow process, aeration process, sedimentation process, and supernatant water discharge process in the batch tank, respectively, and perform automatic operation.Also, setting values can be changed even during automatic operation. As a result, the process monitor and the color display with good visual confirmation of the elapsed time and the like during each of a plurality of batch tanks are performed, so that a batch type sludge treatment control device capable of accurately grasping the progress of the process can be provided.

Further, a DO meter for detecting the respective DO values is provided in a plurality of batch tanks, a batch tank blower for sending air to a plurality of aeration agitators is provided, and the control means detects each DO meter. Since the air volume of each batch tank blower was adjusted by PID control so that the DO value set on the touch panel based on the value was obtained, the DO value became more stable.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing a configuration and a flow of a batch type sludge treatment control device according to an embodiment of the present invention.

FIG. 2 is a block circuit diagram of the batch type sludge treatment control device.

FIG. 3 is a time schedule of a batch controller of the batch type sludge treatment control device.

FIG. 4 is an example of a process time setting screen on the touch panel of the apparatus.

FIG. 5 is an example of a process monitor screen.

FIG. 6 is an example of a process monitor detail screen.

[Explanation of symbols]

 12 No. 1 batch tank 13 No. 2 batch tank 14 No. 1 aeration stirrer 15 No. 2 aeration stirrer 16 No. 1 batch tank blower 17 No. 2 batch tank blower 20 No. 1 DO meter 21. No. 2 DO meter 22. No. 1 sludge pulling pump 23. No. 2 sludge pulling pump 25 Sludge 27 Sludge storage tank 37 Batch sludge treatment device 38 Touch panel 38a Setting means 38b Display means 39 Control means 40 Controller for batch

Claims (3)

[Claims] A batch tank, an aeration stirrer, a sludge pulling pump, and a supernatant water discharge device, which are used for aeration agitation, a settling process, and a supernatant water discharge process in which aeration is performed while continuously flowing wastewater. In a batch type sludge treatment apparatus in which each step is sequentially performed as one cycle in a single treatment tank, the batch tank (1
Batch sludge treatment apparatus (3) including a plurality of (2) and (13)
7) The selection of the operation method and the cycle time, the setting of various process times and the like and the setting change for each of the plurality of batch tanks (12) and (13) can be arbitrarily performed.
(2) Touch panel (38) capable of color display with good visual confirmation of process monitor, elapsed time, etc. for each (13)
Control means for receiving data from the batch-type sludge treatment device (37) and setting input from the touch panel (38), and automatically outputting the control to the batch-type sludge treatment device (37) and the display output to the touch panel (38). (39) and the batch controller (40), which supplies sewage to the batch tanks (12) and (13) of the batch type sludge treatment apparatus (37) at different times, and supplies the batch tanks (12). ), Aeration and agitation of sewage in aeration agitation devices (14) and (15) in (13), and a sedimentation treatment, and treated water treated in a plurality of batch tanks (12) and (13) in a disinfection tank ( 33) and discharged into a plurality of batch tanks (1
2) The sludge settled at the bottom of (13) is drawn out by the sludge drawing pumps (22) and (23), stored in the sludge storage tank (27) via the sludge concentration tank (25), and has different inflowing substance components. Depending on the sewage, the selection of the operation method and the cycle time, and the optimal process time of the inflow process, aeration stirring process, sedimentation process and supernatant water discharge process in the multiple batch tanks (12) and (13), respectively. Automatic operation can be set and the set value can be changed even during automatic operation, and a plurality of batch tanks (12), (1)
3) A batch type sludge treatment control device characterized in that a process monitor and a color display with good visual confirmation of the elapsed time and the like during the process are performed so that the progress of the process can be grasped. 2. The touch panel (38) is used to select an operation mode and a cycle time of a batch type sludge treatment apparatus (37), and to set and set various process times for each of a plurality of batch tanks (12) and (13). A setting means (38) which can arbitrarily change and the like
a) and a display means (38b) capable of displaying a process monitor, an elapsed time and the like for each of the plurality of batch tanks (12) and (13) with good visual confirmation. The batch type sludge treatment control device as described in the above. 3. A DO meter (20), (21) for detecting a DO value and inputting it to a control means (39) is provided in each of the plurality of batch tanks (12), (13). Batch aeration blowers (16) and (17) for supplying air to the aeration stirrers (14) and (15), respectively, are provided, and the control means (39) adjusts the detection value of each DO meter (20) and (21). The batch type sludge treatment control device according to claim 1 or 2, wherein the air volume of each batch tank blower (16), (17) is adjusted by PID control so that the DO value set on the touch panel (38) is obtained. .