KR100918407B1 - Advenced tretment system using Biofilm mass control and Automatic Process control system - Google Patents

Abstract

The present invention secures the amount of microorganisms attached to Bacillus by constantly adjusting the amount of microorganisms attached to the mesh-type microbial contact rotating body by automatic control, and automatically removes organic substances and suspended solids by controlling MLSS and surplus sludge in the reaction tank, as well as phosphorus. The present invention relates to an advanced sewage treatment apparatus using microbial adhesion amount control and automatic process control that can be efficiently and efficiently removed.

The present invention is installed in a storage tank for storing the raw water flowing from the outside, the sludge measuring means for measuring the sludge component contained in the raw water in the storage tank; Rotating disc with a plurality of reticulated microbial contact rotors at predetermined intervals to rotate by externally provided power and to reduce the concentration of organic matter and nutrient salts contained in the inflow water by passing the inflow water from the reservoir. article; An excess sludge preventing means for preventing excessive attachment of Bacillus sludge to the rotating bodies by being installed between the reticular microbial contact rotating bodies of the rotating disk; A bioreactor for removing residual organic matter and nutrients by biological reaction of raw water passing through the reticular disk; A sedimentation tank for storing the treated water flowing out of the bioreactor and discharging the supernatant; A sludge conveying pump installed in each of the settling tank and the bioreactor for conveying the settling sludge to the rotary disk tank; A control unit for calculating dissolved oxygen (DO) concentration / blowing amount, MLSS concentration, sludge conveyance flow rate and surplus amount by calculating the measured value measured from the sludge measuring instrument; And a control device for controlling the operation of various general apparatuses used in the processing operation of the rotating disk tank and the bioreactor by receiving a control signal from the control unit, and provides an apparatus and method for treating sewage altitude using an automatic microorganism attachment amount control and process automatic control device. do.

Bacillus, Rotating Disk, Reticulated Microbial Contact Rotator, Microorganism Attachment Control, Sewage Treatment

Description

Advanced sewage treatment system and method using microbial adhesion control and process automatic control system {Advenced tretment system using Biofilm mass control and Automatic Process control system}

The present invention relates to an advanced sewage treatment apparatus that can induce the removal of organic matter, nitrogen and phosphorus contained in sewage and wastewater by improving the reticular rotating disk applied to the existing SEIL-BC method and introducing an automatic control system. Specifically, by controlling the amount of microorganisms attached to the reticulated microorganisms of the reticulated microorganisms to prevent the elution of phosphorus due to the stabilization of treated water quality and the anaerobic treatment of highly adherent sludge, the automatic control is realized, compared to manual maintenance by manpower The present invention relates to an advanced sewage treatment apparatus and method using a microorganism attachment control and a process automatic control apparatus that can enhance the performance of a sewage treatment facility by enhancing a management function.

Most of the development of advanced sewage and wastewater treatment processes in Korea has remained at the level of changing some of the BNR processes such as A ₂ O method, which is a foreign existing technology, and it is difficult to see them with the unique technology of Korea. Has hardly attempted to win overseas sewage and wastewater treatment projects. Existing BNR process has been developed around the world in the form of activated sludge base, floating or attached or mixed process technology. Among them, the special microorganism dominant sewage advanced treatment technology developed in Japan's manure treatment technology and developed in Korea as a technology of practical use still remains at the technology level in the domestic application stage. As the dominant technology of special microbial mixed bacteria, which is one of the special microbial methods, the B ₃ method and the HBR method of the floating organism type and the SEIL-BC method of the attached organism type have been proposed. Although manure treatment technology using floating special microorganism was developed in Japan, SEIL-BC method, which is a high-density attached special microorganism dominant technology, is an original technology developed in Korea. Although the SEIL-BC method is a small-capacity facility, it is already applied to a number of high concentration organic wastewater treatment facilities in Korea and Japan, and it is a technology showing excellent operation performance.

As shown in FIG. 1, the SEIL-BC method is composed of an adhesion growth SEIL-BC (RBC) at the front end and a floating growth reactor at the rear end, and the concentration of organic matter and nutrients is greater than about 50% while passing through the front end. It is removed, and advanced sewage and wastewater treatment method is to remove residual organic matter and nutrients from the floating growth reactor at the next stage. The above method removes the initial concentration of organic matter and nutrients from about 50% to 80% by attaching Bacillus sp. Mixed bacteria to a rotating microbial contact device using special fibers, thereby providing a site area for the installation of the reactor in the rear stage. By reducing the volume of the reactor, maintenance costs such as required site reduction and power costs can be greatly reduced compared to the current high-treatment methods.

The SEIL-BC method is operated by varying the operation conditions of the reactor after calculating the air flow rate, conveying amount, MLSS, excess sludge by artificial methods and experiments.

However, in the SEIL-BC method, organic matters and suspended solids can be significantly removed, but nitrogen and phosphorus removal techniques are insufficient, and facility costs and facility maintenance costs are too high compared to treatment efficiency.

In particular, the revolving disk reactor structure of the SEIL-BC method has no device for adjusting the adhesion amount of the Bacillus sludge. Therefore, the voids of the reticular rotating discs are prevented due to over-establishment of the Bacillus-attached microorganisms, and as a result, the inside of the reticular rotating discs is anaerobic or decayed, thereby deteriorating the state of the Bacillus sludge and failing to secure a stable water quality. It also acts as a source of pollution, and phosphorus has another problem of deteriorating water quality by being re-dissolved.

Figure 5a shows a state in which the pores are blocked after 7-10 days after the sludge is attached to the reticulated microorganism rotating body.

In addition, the SEIL-BC method has another problem that it is difficult to cope with the sudden occurrence of abnormality when the rapid flow rate change and the condition of the reactor deteriorated.

Therefore, the present invention has been proposed to solve the above problems, by constantly adjusting the amount of adherent microorganisms of the reticulated microbial contact rotor by automatic control to secure the amount of microorganisms attached to the Bacillus, MLSS and excess sludge in the reaction tank The purpose of the present invention is to provide an advanced sewage treatment apparatus using microorganism adhesion amount control and process automatic control apparatus which can remove organic substances and suspended solids and remove phosphorus economically and efficiently by automatic control.

In order to achieve the above object, the present invention is installed in a storage tank for storing the raw water flowing from the outside, the sludge measuring means for measuring the sludge component contained in the raw water in the storage tank; Rotating disc with a plurality of reticulated microbial contact rotors at predetermined intervals to rotate by externally provided power and to reduce the concentration of organic matter and nutrient salts contained in the inflow water by passing the inflow water from the reservoir. article; An excess sludge preventing means for preventing excessive attachment of Bacillus sludge to the rotating bodies by being installed between the reticular microbial contact rotating bodies of the rotating disk; A bioreactor for removing residual organic matter and nutrients by biological reaction of raw water passing through the reticular disk; A sedimentation tank for storing the treated water flowing out of the bioreactor and discharging the supernatant; A sludge conveying pump installed in each of the settling tank and the bioreactor for conveying the settling sludge to the rotary disk tank; A control unit for calculating dissolved oxygen (DO) concentration / blowing amount, MLSS concentration, sludge conveyance flow rate and surplus amount by calculating the measured value measured from the sludge measuring instrument; And it provides a sewage altitude treatment apparatus using a microorganism adhesion amount control and process automatic control device including a control operation for receiving the control signal from the control unit to control the operation of the various various equipment used in the processing operation of the rotating disk tank and the biological reaction tank.

In addition, the present invention comprises a first step of measuring the organic matter and nutrients contained in the raw water of the storage tank by using an automatic meter, and operating the pump pump to introduce the raw water into the rotating disk tank; A second step of determining dissolved oxygen (DO) concentration / blowing amount, MLSS concentration, conveying flow rate and surplus by receiving the measured value measured by the automatic meter and the flow rate measured value measured by the flow meter installed in the storage tank; Transmitting a command value calculated from the controller to a controller operation to control the flow rate flowing into the rotating disk tank and the return flow rate from the bioreactor to constantly adjust the amount of microorganisms attached to the rotating disk tank; A fourth step of adding the Bacillus microorganism and the Bacillus activator to the rotating disk tank to operate the reticulated microbial contact rotating body installed in the rotating disk tank so that the Bacillus sludge is attached; Process of passing through the rotating disk tank while maintaining the optimum dissolved oxygen (DO) and MLSS by adjusting the conveying sludge and the blowing amount to be injected into the bioreactor by the control command of the controller operation executed by the control signal of the controller. A sixth step of removing residual organic matter and nutrients contained in the water; And a seventh step of storing the treated water passing through the bioreactor in the settling tank and releasing the supernatant, wherein a part of the settling sludge is returned to the rotating disc tank and the bioreactor and the excess sludge is discharged to the outside. And it provides an advanced sewage treatment method using a process automatic control device.

According to the characteristics of the present invention as described above, even in the removal of BOD, COD, SS and nitrogen, especially phosphorus, a high treatment efficiency can be obtained (BOD, SS 5 ~ 10 mg / L, TN 10 ~ 15) mg / L, TP 0.3 ~ 0.8mg / L), and other conventional methods consisted of four stages using a reticulated microbial rotator and a bioreactor, but in the present invention the three stages equal to or greater than the conventional treatment efficiency. By obtaining the processing efficiency, there is an effect that the processing time can be shortened sufficiently.

In addition, the present invention enables a compact facility, the amount of adhesion to the adherent microorganisms can be constantly adjusted by the Bacillus sludge excess adhesion prevention brush, can be operated under optimal conditions by automatic control, and can reduce the cost That has a different effect.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The sewage altitude treatment apparatus using microorganism adhesion amount control and process automatic control apparatus according to the present invention improves the reticular rotating disk tank and automatically controls DO, MLSS and surplus sludge in the reaction tank to secure an optimal amount of microorganisms attached to Bacillus, It is implemented to improve the efficiency of removing organic matter and nutrients under the operating conditions.

Figure 2 is a schematic diagram showing the configuration of an embodiment of the sewage treatment apparatus according to the present invention, Figure 3 is a schematic diagram showing the configuration of an automatic control system for sewage treatment process according to the present invention, Figure 4 is a main part of the present invention It is a schematic diagram which shows the structure of the network type microbial contact rotor.

The present invention, as shown in the drawings, the storage tank (2) for storing the inflow source water including the waste water; An automatic measuring device (4) for measuring sludge components contained in the raw water of the storage tank, for example, NH4, NO3, PO4, COD, PH and the like; A pumping pump (6) installed in the storage tank (2) for supplying raw water to a rotating disk tank to be described later; A flow meter (8) for measuring the raw water discharge flow rate pumped by the pump pump (6); An automatic control valve 10 which is automatically opened and closed by an external control signal to automatically control the raw water flow rate; Rotating disk tank is provided with a plurality of reticular microbial contact rotating body 11 in order to store the raw water flowing through the pump pump 6 and to primarily reduce the concentration of organic matter and nutrients contained in the raw water ( 12); A floating-growth bioreactor 14 for removing residual organic matter and nutrients contained in the raw water passing through the rotary disc 12 by a biological reaction; A blower 16 for supplying blown air to the bioreactor 14 to make aerobic conditions; An internal circulation pump 18 for returning the sludge deposited in the bioreactor 14 to the rotary disk 12; A settling tank 20 for storing the treated water overflowed from the bioreactor 4 and draining the supernatant water; A sludge conveying pump 22 for conveying the settling sludge settled in the lower portion of the settling tank 20 to the rotary disk 12; A surplus pump 24 connected to the settling tank 20 for carrying out the remaining excess sludge conveyed through the sludge conveying pump 22 to the outside; Control unit for determining dissolved oxygen (DO) concentration / blowing amount, MLSS concentration, sludge conveyance flow rate and excess amount by calculating the measured value measured from the automatic measuring device (4) in order to treat the sewage and waste water in the optimum operating conditions ( 26); Receiving a control signal from the control unit 26, various kinds of equipment used in the processing operation of the rotary disk 12 and the bioreactor 14, for example, the automatic control valve 10, the blower 16, the internal circulation pump (18), a controller operation 28 for controlling the operation of the sludge conveying pump 22, the surplus pump 24, and the like.

Here, as shown in Figure 4, the reticulated microbial contact rotating body 11 of the rotary disk 12 is installed at a predetermined interval on the rotation drive shaft 12a, the reticulated microbial contact rotating bodies 11 Between the) is provided a brush 15 to prevent the Bacillus sludge is excessively attached to it. Accordingly, as shown in FIG. 5B, the Bacillus sludge corresponding to the excess amount attached to the reticulated microbial contact rotating body 11 is removed from the brush 15 so that the amount of microorganism can be constantly adjusted.

Reference numeral 13 denotes a drive motor for rotating the reticulated microbial contact rotor 11.

In the embodiment of the present invention, the bioreactor 14 has a three-stage structure, and the bioreactor 14 includes an oxidation reduction potential (ORP) sensor, a dissolved oxygen (DO) concentration sensor, and MLSS (Mixed). Liquor Suspended Solid) Each concentration sensor is installed. Therefore, by appropriately adjusting DO and ORP of the bioreactor according to the fluctuation of inflow water by the automatic control of the control unit 26, it is possible to predominantly mix the Bacillus species mixed bacteria introduced into the rotating disc tank 12, and also in the reaction tank. MLSS and surplus sludge are automatically controlled to maintain the best operating conditions.

Next, the microorganism adhesion amount control and process automatic control method of the sewage treatment apparatus according to the present invention configured as described above will be described.

First, the organic matter and nutrient salts contained in the raw water of the storage tank 2 are measured by using the automatic measuring device 4, and the pump pump 6 is operated to introduce the raw water into the reticulated rotary disk 12.

When the measured value measured by the automatic measuring device 4 and the flow rate value measured by the flow meter 8 are input to the control unit 26, the control unit 26 controls dissolved oxygen (DO) concentration / blowing amount, MLSS concentration, and sludge. Determine the return flow rate and surplus amount.

Here, the determination by the control unit 26 is programmed based on the results of the prediction and verification through the operation and modeling of MLSS and surplus sludge in the bioreactor, conveying sludge, flow meter, automatic control valve, automatic measuring instrument, etc. It is calculated and determined by the automatic control program.

That is, the measurement data measured by pH, DO, ORP, MLSS, NO ₃ , NH ₄ , COD, PO4-P and the like through the automatic measuring device 4 and the flow measurement value measured by the flow meter 8 are controlled by the control unit ( 26, and when the DO concentration, ORP, and MLSS concentration detected in the bioreactor are transmitted to the control unit 26, the control unit 26 models the water quality of the effluent and the state of the bioreactor 14 by modeling. It calculates the appropriate DO concentration, MLSS, conveying flow rate, surplus flow rate, and blowing amount by calculating the set value, and transmits the command value to the controller operation 28. The control unit 28 transmits the command value received to the automatic control valve 10, the blower 16, the internal circulation pump 18, the sludge conveying pump 22, the surplus pump 24 to the optimum conditions Will drive.

By controlling the operation of the control unit 26 and the control unit 28 as described above, the flow rate flowing from the storage tank 2 into the rotary disk tank 12 and the conveying flow rate from the bioreactor 14 are controlled to rotate the rotary disk tank. The amount of adherent microorganism in (12) is to be constantly controlled.

Next, a Bacillus microorganism and a Bacillus activator are added to the rotating disk 12, and the microbial contact rotating body 11 installed in the rotating disk 12 is partially deposited in raw water and then rotated to resemble a Bacillus sludge. It is attached to the microbial contact rotating body (11). At this time, if the amount of microorganism adhered to the rotating disk tank 12 is excessively grown, it is kept constant by the brush 15 installed between the reticulated microbial contact rotating body 11.

By controlling the DO and ORP of the bioreactor according to the fluctuation of the inflow source by the control of the control unit 26, the concentration can be properly adjusted to predominantly mix the Bacillus species, and the MLSS and surplus in the bioreactor 14 can be controlled. The sludge will be controlled automatically.

By the control command of the control operation 28, the conveying sludge and the blowing amount to be injected into the bioreactor 14 is adjusted, and passes through the rotational power plate 12 while maintaining the optimum dissolved oxygen (DO) and MLSS. Residual organics and nutrients contained in a treated water will be removed.

The control unit 26 maintains dissolved oxygen (DO) in the first stage of the bioreactor 14 at 1 to 2 mg / L, and maintains the dissolved oxygen in two stages of 1 mg / L or less and three stages of dissolved oxygen (DO). ) To be kept constant at 0.3 mg / L or less.

The treated water passing through the bioreactor 14 is stored in the settling tank 20, the supernatant is discharged, a part of the settling sludge is returned to the rotary disk 12 and the bioreactor 14 and the excess sludge to the outside It is taken out.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be apparent to those who have knowledge.

1 is a schematic diagram showing the configuration of a sewage treatment apparatus according to the prior art.

Figure 2 is a schematic diagram showing an embodiment configuration of an advanced sewage treatment apparatus using a microorganism adhesion amount control and process automatic control apparatus according to the present invention.

Figure 3 is a schematic diagram showing the configuration of an automatic sewage treatment process automatic control system according to the present invention.

Figure 4 is a schematic diagram showing the configuration of the reticular microbial contact rotating body which is the main part of the present invention.

Figures 5a and 5b is a photograph showing the state of the reticulated rotating disk (RABC) Bacillus sludge before and after planting.

* Explanation of symbols for main parts of the drawings

2: storage tank 4: automatic measuring instrument

6: pumping pump 8: flow meter

10: automatic control valve 11: reticulated microbial contact rotor

12: rotating disk tank 14: bioreactor

16: Blower 18: Internal Circulation Pump

20: sedimentation tank 22: sludge return pump

24: surplus pump 26: control unit

28: control operation

Claims (7)

Sludge measuring means is installed in the storage tank for storing the raw water flowing from the outside, measuring the sludge component contained in the raw water in the storage tank; Rotating disc with a plurality of reticulated microbial contact rotors at predetermined intervals to rotate by externally provided power and to reduce the concentration of organic matter and nutrient salts contained in the inflow water by passing the inflow water from the reservoir. article; An excess sludge preventing means for preventing excessive attachment of Bacillus sludge to the rotating bodies by being installed between the reticular microbial contact rotating bodies of the rotating disk; A bioreactor for removing residual organic matter and nutrients by biological reaction of raw water passing through the reticular disk; A sedimentation tank for storing the treated water flowing out of the bioreactor and discharging the supernatant; A sludge conveying pump installed in each of the settling tank and the bioreactor for conveying the settling sludge to the rotary disk tank; A control unit for calculating dissolved oxygen (DO) concentration / blowing amount, MLSS concentration, sludge conveyance flow rate and surplus amount by calculating the measured value measured from the sludge measuring instrument; And Controller operation for controlling the operation of the various general devices used in the processing operation of the rotary disk tank and the biological reaction tank by receiving a control signal from the controller Sewage treatment apparatus using microbial adhesion amount control and process automatic control device comprising a. The method of claim 1, Sewage treatment apparatus using the microorganism adhesion amount control and automatic process control, characterized in that the sludge excess adhesion preventing means made of a brush. The method according to claim 1 or 2. A flow meter for measuring the flow rate of the raw water flowing into the rotary disk tank from the storage tank; An automatic control valve for controlling the flow rate supply according to the value measured by the flow meter; A dissolved oxygen concentration sensor for measuring the dissolved oxygen concentration of the raw water in the bioreactor; MLSS concentration sensor for measuring the MLSS concentration of the raw water in the bioreactor; A redox potential sensor for measuring a redox potential with respect to raw water in said bioreactor; A blower providing blow air to the bioreactor to make aerobic conditions More, The control device controls the operation of the automatic control valve, the dissolved oxygen concentration sensor, the MLSS concentration sensor, the redox potential sensor, and the blower according to the control signal of the control unit. Processing unit. A first step of measuring organic matter and nutrients contained in the raw water of the storage tank by using an automatic measuring device, and operating a pump pump to introduce the raw water into the rotating disk tank; A second step of determining dissolved oxygen (DO) concentration / blowing amount, MLSS concentration, conveying flow rate and surplus by receiving the measured value measured by the automatic meter and the flow rate measured value measured by the flow meter installed in the storage tank; Transmitting a command value calculated from the controller to a controller operation to control the flow rate flowing into the rotating disk tank and the return flow rate from the bioreactor to constantly adjust the amount of microorganisms attached to the rotating disk tank; A fourth step of adding the Bacillus microorganism and the Bacillus activator to the rotating disk tank to operate the reticulated microbial contact rotating body installed in the rotating disk tank so that the Bacillus sludge is attached; Process of passing through the rotating disk tank while maintaining the optimum dissolved oxygen (DO) and MLSS by adjusting the conveying sludge and the blowing amount to be injected into the bioreactor by the control command of the controller operation executed by the control signal of the controller. A sixth step of removing residual organic matter and nutrients contained in the water; And The seventh step of storing the treated water passing through the bioreactor in the sedimentation tank to discharge the supernatant, part of the sedimentation sludge is returned to the rotary disk and the bioreactor and the excess sludge is taken out to the outside Sewage treatment method using the microbial adhesion amount control and automatic process control device comprising a. The method of claim 4, wherein The second step is Measurement data measuring pH, DO, ORP, MLSS, NO ₃ , NH ₄ , COD, PO4-P through the automatic measuring device, flow measurement value measured by the flow meter, DO concentration detected in the bioreactor, ORP, The control unit receives the MLSS concentration value, and calculates the water quality concentration of the effluent and the state of the bioreactor according to the values set by the modeling to determine the appropriate DO concentration, MLSS, return flow rate, surplus flow rate, and air flow rate control. And advanced sewage treatment method using automatic process control device. The method of claim 4, wherein The fourth step is Sewage height treatment method using a microorganism adhesion amount control and process automatic control device to prevent the excessive growth of microorganisms attached to the reticulated microbial contact rotating body by installing a brush between the reticulated microbial contact rotating body. The method of claim 4, wherein The sixth step The control unit maintains the dissolved oxygen (DO) in the first stage of the bioreactor 14 at 1 to 2 mg / L, the dissolved oxygen (DO) in the second stage is 1 mg / L or less, and the dissolved oxygen (DO) in the third stage is 0.3. Sewage altitude treatment method using a microorganism adhesion amount control and process automatic control device characterized in that the control to maintain a constant below mg / L.

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