KR100338510B1 - Real-time control technology for wastewater treatment system - Google Patents

Abstract

The present invention relates to a manure and waste water treatment system (hereinafter abbreviated as waste water treatment system) in the environmental field, more specifically Oxidation-Reduction Potential (hereinafter referred to as ORP), pH change alone The present invention relates to real-time control of wastewater treatment systems using or together.

In the present invention, the ORP probe (2) and the pH probe (3) are installed alone or in combination in the wastewater treatment system (1), and the real-time control of the aerobic treatment step and the anaerobic treatment step according to the treatment progress of the treatment object. After the points are sequentially signaled through the probe, the signals are recognized by the recognizable external means 7 to switch the treatment step or discharge the treated water and introduce new wastewater.

According to the present invention, irrespective of wastewater treatment efficiency and wastewater characteristics or system environment changes, the wastewater treatment time and aeration and agitation can be optimized. It has the advantage of optimizing the processing capacity because it automatically recognizes biochemical changes occurring in the processing step and then switches to the next processing step or stops and restarts the processing when it is completely processed.

Description

Real-time control method of wastewater treatment system {Real-time control technology for wastewater treatment system}

The present invention relates to a manure and waste water treatment system (hereinafter abbreviated as waste water treatment system) in the environmental field, more specifically Oxidation-Reduction Potential (hereinafter referred to as ORP), pH change alone The present invention relates to real-time control of wastewater treatment systems using or together.

At present, most domestic and foreign wastewater treatment systems require a first, second or third stage of treatment to remove contaminants such as organic matter, nitrogen and phosphorus in the wastewater. As a result, the system has the following problems.

First, all wastewater treatment facilities are design-based technologies, and the treatment efficiency is very variable according to the characteristics of the wastewater flowing into the system. Especially, the characteristics of high concentration wastewater such as livestock wastewater are very variable. Due to the variability of the livestock wastewater treatment facilities, the facilities are not operating properly.

Second, since the treatment stage and treatment time (HRT) of wastewater treatment facilities are determined and operated by design, when the incoming wastewater concentration is higher than the design concentration, treatment is not performed properly and the pollutants are discharged as it is. This causes serious environmental pollution problems. On the other hand, when the concentration of wastewater entering the system is lower than the design concentration of the wastewater treatment system, the treatment continues for a predetermined treatment time (HRT) even though the treatment is already completed in the system. According to the waste of processing costs,

Third, it is not possible to optimize the treatment capacity, treatment efficiency and treatment cost of the wastewater treatment system because each treatment stage and treatment time cannot be adjusted by responding to changes in the treatment environment and sludge activity of the wastewater treatment system that changes frequently.

Fourth, when the removal of certain or all pollutants in the wastewater is completed, the processing efficiency and treatment water quality are not constant due to the absence of real-time automatic treatment technology that switches to the next treatment stage or discharges the treated water and introduces new wastewater. not.

While it is urgent to develop an alternative environment-friendly system while optimizing the treatment capacity, treatment efficiency and treatment cost of the wastewater treatment system for such problems, the conventional technology does not provide a clear alternative to this. .

The problems of the conventional wastewater treatment technologies as described above can be solved by real-time automatic wastewater treatment technology. Real-time automatic treatment technology is used when the removal of specific pollutants to be removed at each treatment stage of the wastewater treatment system is completed. As a technology that recognizes itself and moves to the next stage, it means an automated treatment technology that discharges treated water and introduces new waste water when the pollutants are finally removed from the wastewater treatment system. Real-time automatic treatment technology is well suited to solve the above problems of conventional treatment techniques because the complete treatment of contaminants is always performed in the system.

The present inventors use ORP probes and pH probes alone or in combination in the wastewater treatment system as a real-time automatic control technology. The present invention was completed by finding out that the wastewater treatment can be automated by sequentially recognizing through the recognition means hereinafter).

Accordingly, an object of the present invention is to automatically adjust the real-time wastewater treatment capacity, treatment efficiency and treatment cost by a method of sequentially monitoring real-time control points according to the progress of wastewater treatment using an ORP probe or a pH probe. It's about providing technology.

1 shows ORP and pH patterns of a wastewater treatment system.

2 shows an example of a device diagram of a real-time automatic control system.

3 is a graph showing the movement range (MRG) / min of the ORP.

Figure 4 shows an example of the real-time automatic treatment of wastewater treatment system using ORP.

5 shows the pattern change of ORP and pH-mV over time.

Figure 6 shows an example of the real-time automatic treatment of the wastewater treatment system using pH-mV.

7 is an example of a continuous batch processing system using a combination of pH-mV and ORP

(a) Pattern change of ORP with time

(b) shows the pattern change of pH-mV over time.

8 shows a flowchart of real-time automatic processing using ORP for SBR.

9 shows a flow chart of real time automatic processing using ORP or pH-mV for aerobic treatment systems.

10 shows a flowchart of real-time automatic processing using ORP for the newly designed TSSBR system.

11 shows a flow chart of real time automatic processing using pH-mV for SBR system.

12 shows a flow chart of real-time automatic processing using pH-mV for the newly designed TSSBR system.

Figure 13 shows a flow chart of real-time automatic processing using a combination of ORP and pH-mV for the SBR system.

The present invention relates to a real-time automatic control technology of the wastewater treatment system, the contents of the ORP change and the pH change alone or in combination with ORP and pH.

In monitoring batch changes in ORP and pH in a batch-operated wastewater treatment system, a number of specific points arise, each associated with a variety of biochemical changes within the system.

Figure 1 shows the change in ORP and pH according to the progress of wastewater treatment, looking at the ORP change curve S point (Starting point) occurs with the start of the aerobic treatment step is ORP in response to the air supply ORP Is very large at this point.

N (Nitrification point) point is the point at which the effect of air supply is reduced and the removal of various pollutants in the wastewater treatment system starts to occur actively. Representative reactions at this point are oxidation, nitrification and removal of phosphorus. . At this point the ORP slowly increases. Nitrogen Break (NB) points indicate that the nitrification process is complete when the ammonia nitrogen in the waste water is completely removed, and the ORP increases abruptly. This point is also a point of increasing dissolved oxygen in the wastewater treatment system. Residual Carbon Manipulation (RCM) points are the point at which ORP changes begin to be constant, and if organic matter and phosphorus remain in the waste water, they are continuously removed. There is no specific ORP change even after continuous aerobic treatment. In certain wastewater treatment systems that do not contain any nitrogen, NB points do not occur and RCM points occur immediately after N points. NBP or RCMP is used as the end of the aerobic treatment step, since after this time the ammonia nitrogen is completely removed and the oxidation of organics and the removal of phosphorus are almost complete. Although small amounts of organics and phosphorus remain intact, subsequent aerobic treatment is unnecessary because the removal of remaining organics and phosphorus continues as denitrification proceeds in the next treatment step, anoxic. . Continued aerobic treatment beyond the RCM point results in the lack of organics to be used for denitrification in the next anaerobic treatment step, as the organics present are either excessively oxidized or completely removed and the microbes consume all of the stored energy sources. Without the supply of carbon sources, denitrification will not occur effectively. The Oxygen Decrease (OD) point (the point where the ORP decreases significantly) that occurs as a result of the transition from the aerobic process step to the anaerobic treatment step is caused by a decrease in the amount of dissolved oxygen due to the stop of the aeration, The point of decreasing width) is the point at which the denitrification process is active and the nitric acid produced during the aerobic treatment is converted to nitrogen gas and removed into the air. NK (Nitrate Knee) point (the point where the ORP suddenly decreases) during the denitrification process means that all nitric acid is completely removed at the end of the denitrification process.

As for the pH change, the S point is the point at which the pH increases due to the start of the aerobic phase and striping of CO ₂ gas, etc., and the N point is the point at which the increased pH decreases. The NB point is the point at which the nitrification process is complete, at which point the pH increases. The RCM point is the same as in ORP at the point where the pH is constant.

Fig. 2 shows the system of the present invention by inserting an ORP 2 or pH probe 3 into the treatment system 1 and monitoring biochemical changes occurring during wastewater treatment at intervals of 1 second to 1 minute. In order to amplify the low level electrical signals generated by the probes, each probe is connected to an amplifier 6 and transmitted to a recognizing means 7 such as a computer through a ribbon. The signal obtained from each probe is converted into a binary code which can be processed by the recognition means 7 by the analog / digital conversion card 8 installed in the recognition means, and the wastewater treatment shown in the chart. Proceed according to the real-time control method of the system. The aeration device, agitator and pump are connected with a relay box 10 which can be adjusted by a switching bit which comes out when the control point finds an adjustment point.

(1) Real-time automatic processing technology using ORP (point recognition and control method)

In order to capture each point occurring during the wastewater treatment, a moving range (MRG) or a gradient change (MdORP) of the obtained ORP value is calculated and used at one minute intervals. As shown in FIG. 3, the tracking of the movement range or the change of the gradient of the ORP value makes it possible to easily capture a desired real-time point.

RCMP called NBP or the remaining carbon control point and NKP, the denitrification completion point, are used as the real time control point. NBP or RCMP are used to control aerobic treatment, and NKP is used to treat anaerobic treatment, ie, denitrification.

Each point is recognized sequentially to capture the desired real-time control points. For example, aerobic processing is stopped when NB points are generated after recognizing S · N points in sequence, and an OD point is generated when NK points are generated after recognizing OD and D points that occur while continuously reading ORP changes that occur. Processing stops.

Hereinafter, the process will be described in detail with reference to the flowchart shown in FIG. 8.

1) The recognizing means automatically monitors each value from 1 second to 1 minute intervals from the ORP probes inserted into the processing system and calculates the average value of the monitored values.

2) Calculate a moving average for filtering mV values obtained from each ORP probe. The r value for moving average calculation can be set according to the stability of the ORP value. The smaller the monitor interval is, the larger value is used.

3) Calculate the moving range (MRG / min) or the moving slope ORP value (MdORP / min) at 1 minute intervals. 5 to 20 is used for the calculation.

4) Recognize S point: the point where MRG or MdORP / min is over 50

5) If the S point is recognized, N points are recognized: the point where the MRG or MdORP / min value is less than or equal to 8

6) If N points are recognized, NBP is recognized: the point where the MRG or MdORP / min value is greater than 15

7) If the NB point is used as a real-time control point, immediately after the NB point is recognized, the recognition means stops the aeration device in operation and starts the agitator in the stopped state.

8) If the RCM point is used as a real-time control point, recognize the RCM point after recognizing the NB point: the point where the MRG or MdORP / min value becomes 5 or less. As soon as the RCM point is recognized, the computer stops running aeration and starts the agitator.

9) Regardless of whether NBP or RCMP is used as the real-time control point, the computer starts looking for the OD point immediately after real-time control point recognition.

10) Recognize the OD point: the point where the MRG / min value goes above 20 or the MdORP / min value goes below -40.

11) Recognize the D point after OD recognition: the point where the MRG / min value is 10 or less, or the MdORP / min value is -5 or more.

12) Recognize the NK point after recognizing the D point: the point where the MRG / min value is 25 or more, or the MdORP / min value is again -40 or less.

13) The stirrer stops immediately upon recognition of the NK point, a real-time control point.

The setting of each value for recognizing each point mentioned above can be used by adjusting a little according to the site conditions such as aeration rate, the type of system, and the wastewater to be treated.

(2) Real-time automatic processing technology using pH (point recognition and control method)

Recognition of real-time control point using pH enables stable real-time control because there is less noise of the value obtained from the probe compared to the method using ORP. In addition, in the real-time treatment using the ORP change pattern, the dissolved oxygen content and aeration rate are greatly influenced, so that the balance between the aeration rate and the oxygen consumption by the microorganisms in the wastewater treatment system is effectively used for the NBP, which is a real-time control point of the aerobic treatment step. In order to be recognized, it is inevitable (NBP, which is a real-time control point, is not efficiently recognized using ORP under conditions where the aeration rate is too high or too low), but oxygen consumption and aeration rate are Since no NBP is required in the ORP pattern, NBP always occurs in the pH-mV change even under conditions where NBP is not recognized, thus enabling stable real-time control. This fact, according to Figure 5 it can be seen that the NBP occurs on the pH-mV even under the condition that NBP does not occur in real time on the ORP change.

In order to recognize each point, the mV value generated from the pH probe is used instead of the unit value of pH, and the real time control point is recognized while calculating the movement dpHmV (MdpHmV / min) of the mV value at 1 minute intervals.

The above process will be described in detail with reference to the flowcharts shown in FIGS. 11 and 12.

1) Monitor the mV value from 1 second to 1 minute intervals from each pH probe installed in the wastewater treatment system.

2) Calculate the average value of the monitored values.

3) Calculate the moving average of pH-mV values obtained at 1 second to 1 minute intervals for filtering the signal. At this time, the smaller value of r is, the larger value is used.

4) S, N, NB, RCM points are recognized sequentially while MdpHmV of moving average is calculated at 1 minute intervals.

5) Recognize S point: MdpHmV / min value <-2

6) Recognize N point: MdpHmV / min value> 0.2

7) Recognize the NB point (real time adjustment point): MdpHmV / min value <-0.2

8) Recognize the RCM point (real time adjustment point): MdpHmV / min value> 0.0

Immediately after the RCM point is recognized, the aerator is stopped and the wastewater is discharged.

(3) complex real-time processing technology using pH and ORP

As described in the real-time treatment technology using pH, the ORP value in wastewater treatment system has a large electric noise caused by various facilities such as pumps. Even when operating with a constant aeration rate due to changes in microbial activity during system operation or changes in active sludge concentration in the system due to sludge disposal and changes in the oxygen demand of the system due to variations in load, the aeration rate is excessively higher than that of the system. In case of unbalanced lower or higher aeration rate and oxygen demand rate of the system, it is desirable to use a combination of pH and ORP because it is difficult to recognize the real-time control point of the aerobic treatment step using ORP.

Experimental results show that NKP, a real-time treatment control point for anoxic treatment, is easily recognized by using ORP even under the condition of noise generation. (Because it is an anoxic stage, there is no effect of balance between aeration rate and oxygen demand rate.) NBP, a real-time control point of miracle processing, is difficult to recognize under conditions of severe noise or an imbalance between the aeration rate and the oxygen demand rate of the system. On the other hand, in the real-time treatment using pH, NBP, which is a control point for aerobic treatment, is generated in a predetermined pattern and thus real-time control is possible even in the above conditions.

Using this fact, the combined control method of the present invention uses ORP as a sensor for recognition of NKP, which is a real-time control point of anoxic processing, and as a sensor for recognition of NKP or RCMP, which is a real-time control point of aerobic processing. pH is used.

Hereinafter, the complex control method will be described in detail with reference to the flowchart shown in FIG. 13.

1) Monitor the mV value from 1 second to 1 minute intervals from each ORP / pH probe installed in the wastewater treatment system.

2) Calculate the average value of the monitored values.

3) Calculate the moving average of ORP and pH-mV values obtained at 1 second to 1 minute intervals for signal filtering. At this time, the smaller value of r is, the larger value is used.

4) Calculate the MdpHmV value of the moving average value of pH-mV at 1 minute intervals.

5) Recognize S point.

6) Recognize N points after S point recognition.

7) After N point recognition, NB point (real time control point of aerobic processing) is recognized.

8) When RCMP is used as a real time control point, RCMP is recognized after NBP recognition.

9) Immediately after the NBP or RCMP real-time control point occurs, the aerator is stopped and the agitator is started.

10) MRG / min or MdORP / min block of the ORP moving average value is immediately started when the NBP or RCMP which is a real time processing point occurs.

11) Recognize D point after ODP recognition.

12) Immediately after the DP recognition, the NK point (real-time control point of anoxic treatment) is stopped and the wastewater is discharged.

Hereinafter, the present invention will be described in detail with reference to a continuous batch processing system (SBR), aerobic processing system, and a two-stage batch processing system, but the scope of the present invention is not limited to these operating examples.

<Example 1> Real-time control method of continuous batch processing system (SBR) using ORP change

As shown in FIG. 8, after the S · N points are sequentially recognized using the real time control point recognition method described above (after the S · N · NB points are sequentially recognized when RCMP is used as the real time control point). As soon as the real-time control point NBP or RCMP occurs, the computer stops the aeration system in operation and starts the stirrer to switch the treatment step from aerobic to anoxic.

Subsequently, the OD and D points are sequentially recognized and finally, the stirrer is stopped as soon as NKP, which is a real-time control point of the anaerobic treatment step, is generated. At this time, sludge settling in the treatment system occurs due to the operation of the agitator.

After sludge settling, the pump for discharge of treated water is started, the stirrer is started again after the discharge of treated water is completed, and the new wastewater is introduced into the system by the operation of the wastewater inflow pump and starts to recognize each point sequentially. S → N → NB → RCM → OD → D → NK).

For wastewater requiring phosphorus removal, the ventilator starts running and the stirrer stops as the computer program resets after anaerobic treatment for two to four hours following the wastewater inflow. On the other hand, if wastewater does not require removal of phosphorus, the aerator starts to run and the agitator stops as the computer program resets immediately after the wastewater enters the system. In this case, the anaerobic state after the wastewater inflow is not necessary.

<Example 2> Real time control method of continuous batch processing system (SBR) using pH change

As shown in FIG. 11, after recognizing the S point, N points are sequentially recognized (when S, N, NB points are sequentially recognized when RCMP is used as a real time control point), and NBP or RCMP, which is a real time control point, is When it finally occurs, the aerator is stopped and the stirrer is started.

After 1 to 5 hours of anaerobic treatment for denitrification, the stirrer is stopped. After sludge settling, the treated water is discharged and fresh wastewater is introduced.

For wastewater where phosphorus removal is not required, the aeration system is activated immediately after the wastewater inflow. If phosphorus removal is required, the agitation system is re-started for 2-4 hours after the wastewater inflow, for anaerobic treatment.

<Example 3> Real-time control method of aerobic treatment system using ORP change

As shown in Fig. 9, as the real-time adjustment point, an O point at which the value of NBP · RCMP or MRG / min or MdORP / min almost reaches zero is used. NKP is not used at this time.

After each point is recognized in turn, when a real-time treatment point occurs, the aeration system stops, sludge is settled, and then the treated water is discharged by operating the treated water discharge pump. After the inflow, the aerator is started again by resetting the computer program. As a result, each point is continuously recognized again.

If phosphorus removal is required, the computer program is reset after running the stirrer for 2 to 4 hours after the inflow of the waste water.

Operation Example 4 Real-time Control Method of Aerobic Treatment System Using pH Change

As shown in FIG. 9, the points are sequentially recognized in the same manner as in the third embodiment, and the operation of the aeration device is stopped immediately after the NBP, RCMP or 0 point, which is a real-time control point, is settled.

After sludge settling, the treated water discharge pump is operated, the new wastewater is introduced by the operation of the wastewater inflow pump, and as the system is reset after the inflow of the wastewater, the aeration device is started and again each point is recognized.

If phosphorus removal is required, the stirrer is turned on after fresh wastewater is introduced and reset after 2 to 4 hours of anaerobic treatment.

<Example 5> Real-time control method of two stage batch processing system using ORP

As shown in Fig. 10, in the two-stage batch processing system, only NBP or RCMP is used as the control point, and NKP is not used.

Recognizing each point sequentially, when the real-time control point NBP or RCMP occurred, the aerator and the stirrer of the second treatment tank were stopped, the sludge settled, the final treatment water was discharged from the second treatment tank, and the intermediate treatment water of the first treatment tank was It is transferred to the second treatment tank. After this, the new wastewater flows back into the first treatment tank and the system is reset.

In the case of wastewater requiring phosphorus removal, the stirrer is operated for 2 to 4 hours after the wastewater inflow and the system is reset to start the aeration system and the recognition of each point is restarted.

Operation Example 6 Real-time Control Method of Two Stage Batch Treatment System Using pH Change

As shown in Fig. 12, each point is sequentially recognized in the same manner as in the fifth embodiment.

As soon as the real-time control point NBP or RCMP occurs, the aerator and stirrer are shut down, and the final treated water is discharged from the second treatment tank and the intermediate treated water is transferred from the first reaction tank to the second treatment tank. After the operation of the wastewater inlet pump, the new wastewater is introduced and the system is reset so that the aerator and stirrer are activated and each point starts to be recognized.

If phosphorus removal is required, the stirrer is turned on after fresh wastewater is introduced and reset after 2 to 4 hours of anaerobic treatment.

<Example 7> Real time control technology of SBR system using ORP and pH

As shown in FIG. 13, after each point is sequentially recognized on the pH-mV pattern, the aeration device is stopped and the agitator is started when NBP or RCMP, which is a real-time control point of the aerobic treatment step, finally occurs.

As the real-time control point is recognized on pH-mV, each point recognition using ORP starts (OD → D → NK).

Finally, as the NK point is detected by the computer, the stirrer is shut down, the sludge is settled, the treated water discharge pump is started to discharge the treated water, and then new waste water is introduced.

If phosphorus removal is required, the stirrer will start up again and remain anaerobic for 2 to 4 hours. After the anaerobic treatment has taken place, as the computer is reset, the aerator starts to run and the agitator stops.

On the other hand, if wastewater does not require removal of phosphorus, the aerator will start and the stirrer will stop as the computer program resets immediately after the wastewater enters the system.

Thereafter, each point recognition using pH is restarted for the new influent wastewater.

Figure 7 shows an example of the real-time automatic processing of a continuous batch processing system using a combination of pH-mV and ORP.

Hereinafter, the contents of the present invention will be described in detail by way of examples, but the scope of the present invention is not limited thereto.

Example 1 Real-time automatic processing using ORP (TSSBR system).

The efficiency of real-time automatic treatment technology for pig manure and sewage and wastewater is shown in Tables 1-5.

<Table 1> Real-time automatic processing result using ORP of the present invention

Operation conditions: real time automatic processing point-RCMP, SRT-10 days, stirrer speed: about 60 rpm, obtained average HRT-4.6 days, temperature: room temperature (18-29 ^° C.).

Parameter (mg / L) inflow Outflow medium Standard Deviation medium Standard Deviation remove(%) COD 8267 2589 246 202.47 97.0 TOC _S 1457 738 84 29.18 94.2 NH ₄ -N 326 116 4.0 5.03 98.8 TKN 975 283 42 28.92 95.7 NO _X -N 3.65 1.92 12 10.19 ---- Ortho-p 470 222 32 22.58 93.2 T-P 760 440 48 29.75 93.7 TS (g / L) 6.1389 3.798 1.4514 0.42 76.4 TVS (g / L) 4.4542 2.906 0.4319 0.15 90.3 SS (g / L) 3.2063 0.966 0.0211 0.01 99.3 VSS (g / L) 2.5938 0.692 0.0167 0.01 99.4

<Table 2> Real-time automatic processing result using ORP of the present invention

Operation conditions: real time automatic processing point-RCMP, SRT-9.25 days, stirrer speed: about 60 rpm, average HRT-4.7 days obtained, temperature: room temperature (18-29 ^° C.).

Parameter (mg / L) inflow Outflow medium Standard Deviation medium Standard Deviation remove(%) COD 5565 1508 144 23.4 97.4 BOD _5S 2396 419 9.3 5.45 99.6 TOC _S 1419 257 62 10.5 95.6 NH ₄ -N 250 45.9 5.4 1.26 97.8 TKN 577 190 19 7.84 96.7 NO _X -N 1.92 0.87 11 8.64 ---- Ortho-p 299 34.5 12 3.94 96.0 T-P 383 86.8 19 4.1 95.0 TS (g / L) 3.6340 1.421 0.8962 0.61 75.3 TVS (g / L) 2.8972 0.906 0.4379 0.39 84.9 SS (g / L) 2.310 1.309 0.1119 0.22 95.2 VSS (g / L) 1.998 1.104 0.0719 0.15 96.4

<Table 3> Real-time automatic processing result using ORP of the present invention

Operation conditions: real time automatic processing point-RCMP, SRT-9.87 days, stirrer speed: about 60 rpm, average HRT-5.8 days obtained, temperature: room temperature (18-29 ° C.).

Parameter (mg / L) inflow Outflow medium Standard Deviation medium Standard Deviation remove(%) TOC _S 2518 870 52 6.57 97.9 NH ₄ -N 206 83 2.9 1.36 98.6 TKN 522 128 9.1 1.90 98.3 NO _X -N 1.77 0.92 2.7 1.62 ---- Ortho-p 122 30.3 6.1 2.89 95.0 T-P 152 39.7 7.4 4.48 95.1 TS (g / L) 5.1167 1.687 0.7839 0.419 84.7 TVS (g / L) 3.8014 1.332 0.2641 0.150 93.1 SS (g / L) 3.3875 1.490 0.0864 0.209 97.4 VSS (g / L) 3.2250 1.319 0.0864 0.209 97.3

<Table 4> Real-time automatic processing result using ORP of the present invention

Operation conditions: real time treatment point-NBP, SRT-10.2 days, stirrer speed: about 60 rpm, obtained average HRT-4.1 days, temperature: room temperature (18-29 ° C).

Parameter (mg / L) inflow outflow medium Standard Deviation medium Standard Deviation %remove TOC _s 2126 803 53 14.37 97.5 NH ₄ -N 163 34.8 0.7 0.52 99.6 TKN 391 102 7.3 1.81 98.1 NOX-N 1.6 0.81 2.7 0.94 --- Ortho-p 98 30.4 2.5 0.55 97.4 T-P 121 32.0 2.6 1.03 97.9 TS (g / L) 4.0121 1.716 0.8924 0.20 77.8 TVS (g / L) 2.8890 1.364 0.2825 0.08 90.2 S S (g / L) 1.4833 0.714 0.0479 0.02 96.8 VSS (g / L) 1.4646 1.693 0.0475 0.02 96.8

<Table 5> Real-time automatic processing result using ORP of the present invention

Operation conditions: real time automatic processing point-NBP, SRT-9.4 days, stirrer speed: about 60 rpm, obtained average HRT-4.06 days, temperature: room temperature (18-29 ° C.).

Parameter (mg / L) inflow Outflow medium Standard Deviation medium Standard Deviation remove(%) TOC _S 1327 421 49 15.27 96.3 NH ₄ -N 123 38.9 0.7 0.37 99.4 TKN 287 79.1 8.2 3.25 97.1 NO _X -N 1.69 1.05 2.1 0.87 ----- Ortho-p 64 19.4 3.1 1.14 95.2 T-P 88 20.7 3.5 1.28 96.0 TS (g / L) 3.2167 1.029 0.7714 0.11 76.0 TVS (g / L) 2.3929 0.916 0.3310 0.16 86.2 SS (g / L) 1.9357 1.196 0.0564 0.01 97.1 VSS (g / L) 1.8000 1.121 0.0478 0.01 97.3

Comparative Example Conventional Processing Technique (TSSBR System).

Pig manure and wastewater were treated using traditional techniques depending on the treatment time and the results are shown in Table 6.

ㆍ operation conditions: SRT-11.4 days, HRT-4.8 days, other operating conditions-same as real-time automatic processing

<Table 6> Processing result by the prior art

Parameter (mg / L) inflow outflow medium Standard Deviation medium Standard Deviation %remove TOC _s 2057 844 205 278 90.3 NH ₄ -N 141 53 36.6 34 74.0 TKN 357 137 44.8 42 87.5 NOX-N 1.78 0.54 2.9 2.73 --- Ortho-p 96 46.6 15.1 7.87 84.3 T-P 118 52.8 20.3 12.36 82.8 TS (g / L) 4.1409 2.009 1.0208 0.319 75.3 TVS (g / L) 2.9383 1.520 0.7758 0.486 73.6 S S (g / L) 1.3663 0.729 0.0929 0.075 93.2 VSS (g / L) 0.9407 0.639 0.0783 0.075 91.7

<Example 2> Pig manure and wastewater treatment experiment of SBR system using ORP / pH composite real-time automatic processing technology.

Pig manure and wastewater were treated under the conditions specified below and the results are shown in Table 7.

ㆍ Operating Condition: HRT-2.3 days obtained, SRT-20.5 days, Stirrer speed-about 60 rpm, real time processing point-NBP and NKP, temperature: 18-30 ° C

<Table 7> pH-ORP complex real-time automatic treatment results of the present invention.

Parameter (mg / L) inflow outflow medium Standard Deviation medium Standard Deviation %remove TOC _s 1746 765 28 13.9 98.4 NH ₄ -N 132 48 0.3 0.49 99.8 TKN 323 119 4.1 1.70 98.7 NOX-N 1.73 0.74 1.5 1.69 --- Ortho-p 82 39.9 1.5 1.9 98.2 T-P 105 43.9 1.6 1.4 98.5 TS (g / L) 3.7171 1.6589 0.7209 0.3068 80.6 TVS (g / L) 2.6889 1.2659 0.2423 0.1237 90.0 S S (g / L) 1.5577 0.9480 0.0802 0.1654 94.9 VSS (g / L) 1.2670 0.9231 0.0535 0.0710 95.8

As a result of operating the treatment system by applying the real-time automatic treatment technique of the present invention, a very high treatment efficiency and a constant treatment water quality were obtained despite the large change in the wastewater characteristics and the concentration of pollutants. On the other hand, unlike the real-time automatic treatment as a result of operating using the conventional method, the treated water quality is affected by the characteristics of the wastewater flowing into the system. It was found to be significantly lower than during treatment. Experimental results show that the real-time automatic treatment technology using ORP and pH can solve the problems of the prior art depending on the hydraulic residence time, and the real-time automatic treatment technology provides the system's wastewater treatment capacity, treatment time, treatment efficiency and treatment cost. It has been found to enable optimization of.

According to the present invention, (1) wastewater treatment efficiency and treated water quality are always kept constant regardless of wastewater characteristics or system environment changes, and (2) wastewater treatment time, aeration and agitation, etc. (3) Automatically recognizes biochemical changes occurring at each treatment stage and switches to the next treatment stage, or stops and restarts treatment when the treatment is completed, thereby optimizing treatment capacity. (4) It is possible to remove high pollutants such as organic matter, nitrogen, phosphorus, etc. to prevent the occurrence of environmental pollution problem by discharge of treated water, and (5) It is also applied to the existing low efficiency wastewater treatment system without the establishment of new system. It has the effect of maximizing processing efficiency and processing capacity.

Claims (11)

Wastewater comprising introducing a wastewater treatment object into the wastewater treatment system, treating the introduced wastewater treatment object under aerobic conditions, and releasing the aerobic wastewater treatment object and introducing a new wastewater treatment object. In the processing method, Each step is sequentially controlled by a computer, the aerobic processing step is controlled by, Calculating a moving range or tilt value from a measured value by an ORP probe or a pH probe at predetermined time periods; Sequentially searching for the S point, N point, NB point or RCM point by tracking the obtained moving range or tilt value in real time; If the NB point or the RCM point is recognized as a real-time control point comprising the step of stopping the operation of the aeration device, characterized in that the real-time automatic control method of the wastewater treatment system. The method of claim 1, wherein the wastewater treatment system includes an aerobic treatment system and a two-stage batch treatment system. delete delete delete The method of claim 1, further comprising the step of maintaining the anaerobic state for 2 to 4 hours after the inflow of waste water in the case of waste water requiring phosphorus removal. Introducing the wastewater treatment object into the wastewater treatment system, treating the introduced wastewater treatment object under aerobic conditions, treating the aerobic wastewater treatment object under anaerobic conditions, and undergoing anaerobic treatment. A wastewater treatment method comprising the step of releasing a wastewater treatment object and introducing a new wastewater treatment object, Each step is sequentially controlled by a computer, the wastewater treatment step is controlled by Calculating a moving range or tilt value from a measured value by an ORP probe or a pH probe at predetermined time periods; Sequentially searching for the S point, N point, NB point or RCM point by tracking the obtained moving range or tilt value in real time; Stopping NB points or RCM points as real-time control points and starting the agitator and starting the stirrer; Detecting OD points, D points, and NK points sequentially immediately after the real-time control point is recognized; Real time automatic control method of the wastewater treatment system comprising the step of stopping the operation of the stirrer when the NK point is recognized. 8. The automatic real-time control of the wastewater treatment system according to claim 7, wherein a pH probe is used for the recognition of the real-time control point of the aerobic treatment step, and an ORP probe is used for the recognition of the real-time control point of the anaerobic treatment step. Way. delete delete delete