KR102081530B1 - Total phosphorus processing system for wastewater treatment facility - Google Patents

Abstract

The present invention relates to a system for treating total phosphorus in sewage. More specifically, provided is a system for treating total phosphorus in sewage, which improves the stability of water quality management and increases the economic efficiency by enabling the optimal adaptation in response to a situation when a coagulant is injected into an aeration tank. To this end, the content and quantity of phosphorus in the sewage and treated water flowing into and out of a reactor are monitored and the coagulant is controlled for optimal injection through a dualized injection unit, thereby enabling efficient water quality management.

Description

Total sewage treatment system of sewage {TOTAL PHOSPHORUS PROCESSING SYSTEM FOR WASTEWATER TREATMENT FACILITY}

The present invention relates to the water quality management of sewage, and more specifically, it is possible to optimally adapt according to the situation when coagulant is injected into the aerobic tank, thereby improving the stability of water quality management and improving the economic efficiency of sewage. It is about.

Effluents discharged to rivers, lakes, or seas contain large amounts of nutrients such as nitrogen and phosphorus, in addition to organic matter, which cause algae in the water.

Representative nutrients that cause eutrophication include phosphorus, nitrogen, and carbon. The rate at which these components cause green algae bloom red tide P: N: C = 1: 7: 40 shows the highest sensitivity of the phosphorus content, and a trace amount of phosphorus at a concentration of 0.1 mg / L is known to be a sufficient concentration to cause green algae. As mentioned above, "T-P" acts as a major cause of algae growth, and organic water pollution due to algae is estimated to account for 25 to 30% of the total organic load. Therefore, in the case of urban sewage treatment plants, the effluent water quality standard for total phosphorus is 8 → 2 → 0.5 → 0.3 → 0.2 mg / L, which is strictly reinforced at home and abroad.

Phosphorus component of water pollutant is 90% or more of water pollutant, and in order to remove phosphorus component effectively due to sludge extraction, soluble phosphorus component in water is absorbed (intake, uptake) by microorganisms by microorganism mechanism. Along with the sludge, it is condensed into flocs with a specific gravity greater than water and settles well in the settling basin to be removed. However, flocs formed with a specific gravity lower than water are difficult to expect gravity sedimentation, sensitivity to water temperature changes, etc. Due to various external factors, the total treatment efficiency is 52.5 for large sewage treatment plants using only biological treatment and gravity sedimentation. It is only 8-8% (average 70%, discharge water quality 0.46-1.417 mg / L). However, if the chemical coagulation treatment process is additionally performed, the total treatment efficiency is improved to 92.1 to 96.5% (average 94%, discharged water quality 0.122 to 0.236 mg / L), and if it is added to the filtration facility, the total treatment efficiency is up to 99%. Are reported by domestic and foreign environmental organizations

In general, the removal of total phosphorus in sewage water generally uses an flocculation flotation device for reacting coagulant and phosphorus. The device has advantages such as simple structure, ease of operation and stability of separation performance.

Korean Patent Publication No. 10-1084394 discloses such a total control system, and FIG. 1 is a block diagram thereof.

Specifically, in the sewage treatment system including the primary settling battery 100, the aeration tank 110 to make a biological reaction, and the secondary settling battery 120, the aeration tank 110 and the secondary settlement battery ( A plurality of effluent passages 210 are installed between 120, and a flocculant treatment means 200 is formed so that a coagulant is injected from the upper portion of the treated water flowing through the effluent passage 210 and mixed with the treated water so that a phosphorus removal chemical reaction is performed. ).

The flocculant treatment means 200 is a flocculant injection device 230 is installed on the ditch wall 220 is installed in the outflow passage 210 located at the rear end of the aeration tank 110 and the outflow passage 210 through which the treated water flows. It is made, and installed in the front of the secondary sedimentation battery 120 has been proposed a method of removing the phosphorus is not removed from the biological treatment. Agglomerated sludge can be removed by additional precipitation and the like.

However, in the case of the prior art there is an uneconomical problem because the excessive input of flocculant to comply with the water quality standards. Specifically, in consideration of load fluctuations such as flow rate and amount of pollutant, the amount of coagulant is added more than an appropriate amount to satisfy the water quality standards all the time, thereby increasing the cost of chemicals and the cost of sludge treatment. In some cases, operational problems such as the filter paper being blocked due to the failure to meet the filtration rate.

In addition, it does not adequately cope with changes in flow rate and water quality, so that the homogeneity of the treated water quality cannot be secured, and the plan cannot be accurately established and satisfied in the total phosphorus treatment. If necessary, additional flow adjustment tanks may be added or total phosphorus treatment equipment may need to be added.

 The present invention has been made to overcome the above problems of the prior art, and it is an object of the present invention to provide a stable total quality of sewage treatment system while ensuring stable water quality while optimizing flocculant injection according to load conditions.

The present invention for solving the above problems, is installed in the reaction tank 2000, phosphorus measuring unit 1010 for measuring the aerobic tank phosphorus concentration (P _O ); A primary injection unit 1001 for injecting a flocculant into the inflow water side of the reaction tank; A secondary injection unit 1002 for injecting a flocculant into the reaction tank or the treated water of the reaction tank; Monitoring unit 1020 for measuring the treated water phosphorus concentration (P _tms ); And a collection unit 1100 for collecting measurement signals from the phosphorus measurement unit and the monitoring unit, a determination unit 1200 for performing determination of water quality and flocculant injection based on the measurement signal, and based on the determination of the determination unit. And a total phosphorus control unit 1000 including a management and control unit 1300 for controlling the primary injection unit and the secondary injection unit.

Preferably, the injection determination unit reduces the injection amount of the primary injection portion when the treated water phosphorus concentration (P _tms ) is less than the target phosphorus concentration (P _f ) and the aerobic basal phosphorus concentration (P _O ) is less than the reference phosphorus concentration (P _st ) When the treated water phosphorus concentration (P _tms ) is less than the target phosphorus concentration (P _f ) and the aerobic basin phosphorus concentration (P _O ) is above the reference phosphorus concentration (P _st ) and below the critical phosphorus concentration (P _c ) If the treated water phosphorus concentration (P _tms ) is less than the target phosphorus concentration (P _f ) and the aerobic basal phosphorus concentration (P _O ) is above the critical phosphorus concentration (P _c ), the injection volume of the primary and secondary injection portions is increased. If the treated water phosphorus concentration (P _tms ) is higher than the target phosphorus concentration (P _f ), the injection amounts of the primary injection portion and the secondary injection portion are increased.

In addition, the total phosphorus control unit, when the determination unit transmits and updates the measurement signal or response signal for each ID of the phosphor measuring unit or monitoring unit, the measured phosphorus concentration is higher than the previously measured phosphorus concentration or the phosphorus concentration measurement value And an abnormality determination unit 1240 for judging a case where a deficiency of the measurement occurs as an abnormality of the measurement value. It is preferable to have a defect processing unit 1340 to allow the primary injection portion and the secondary injection portion to operate normally until the inspection is performed by performing the injection determination.

The defect processing unit 1340 may determine the average of the measured phosphorus concentrations in the set time interval as the virtual phosphorus concentration value.

Flow rate measuring unit 1030 for measuring the flow rate of the influent or treated water; further comprising, the phosphorus measuring unit and the monitoring unit, may increase the reporting frequency when the flow rate measured in the flow rate measuring unit is more than the set flow rate.

On the other hand, the total phosphorus control unit, the management and control unit has an alarm unit 1330 to alert when the treated water phosphorus concentration (P _tms ) is more than the target phosphorus concentration (P _f ), and transmits the amount of use of the alarm and flocculant to the user terminal The communication unit 1400 may be further included.

The determination unit may include an inflow load determination unit 1210 that determines whether or not the degree of pre-aggregation according to the phosphorus concentration measured by the phosphorus measuring unit and the inflow flow rate of the influent water measured by the flow measuring unit.

In addition, the management and control unit provides the user terminal as a table or graph by comparing the monthly usage of the coagulant, the year-on-year usage, the cumulative usage statistics of the year and the aerobic concentration pattern based on the coagulant injection amount and operating time of the injection unit And, it can be provided with a history management unit 1350 to perform notification when the consumables replacement time and the flocculant replenishment cycle is reached.

According to the present invention, since it is possible to install only by adding or changing the phosphorus measuring unit and the injecting unit of the flocculant without changing the existing sewage treatment system, the burden on the facility is small, and the state of the treated water as well as the state of the aerobic tank Accordingly, the control of the injection of the coagulant of the primary injection portion and the secondary injection portion separately under various conditions has an effect that can dramatically improve the economic efficiency.

In particular, problems such as excessive processing and blockage of the conventional flocs can be easily solved only by the control of logic, and it is possible to immediately respond to the flow rate or contamination level, so that the water quality can be stably maintained and the plan of the facility It is advantageous in operation.

In addition, since the quality and condition of sewage treatment can be monitored remotely through a wireless communication network, there is an advantage that the integrated control of each point can be efficiently performed, and the economics and reliability of the facility and maintenance are improved. It works.

1 is a block diagram of a conventional control system.
2 is a block diagram of a total sewage treatment system for sewage according to the concept of the present invention.
3 is a block diagram for explaining the system of the sewage total phosphorus treatment system of the present invention.
Figure 4 is a block diagram showing an embodiment of the determination unit in the total sewage treatment system of sewage of the present invention.
Figure 5 is a block diagram showing an embodiment of the management and control unit in the sewage total phosphorus treatment system of the present invention.
6 is a flow chart illustrating a total phosphorus treatment method for sewage according to the concept of the present invention.
7 is a view showing an application example of the total sewage treatment system of sewage of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the total sewage treatment system of sewage of the preferred embodiment according to the present invention.

However, the embodiments described below are merely to describe in detail enough to be able to easily carry out the invention by those skilled in the art to which the present invention pertains, and thus the protection scope of the present invention is limited. It does not mean.

In the following description, when a part is 'connected' to another part, this includes not only a case where the part is directly connected, but also a case where another element or device is connected between them. In addition, when a part is said to "include" a certain component, this means that it may further include other components rather than exclude other components unless specifically stated otherwise.

The present invention basically monitors the phosphorus content and quantity of the sewage and treated water flowing into and out of the reactor and controls the optimal infusion of flocculant through the dualized inlet to enable efficient water quality management. To provide.

The present invention is based on the application of flocculant to the sewage treatment plant, but the sewage includes a water-containing water discharged from various environments and is not particularly limited to the embodiments of the present invention.

2 is a block diagram of a total sewage treatment system for sewage according to the concept of the present invention.

As a basic application, the present invention provides a primary injection unit 1001 for injecting a flocculant into the inflow water α side of the reaction tank 2000 and a secondary injection for injecting a flocculant into the reaction tank 2000 or the treated water β side. Part 1002, the phosphor measuring unit 1010 for detecting the phosphorus content of the reaction tank 2000, the monitoring unit 1020 for measuring the water quality including the phosphorus content of the treated water (β), and the phosphorus measuring unit And a total phosphorus control unit 1000 that optimally controls the injection amount of the primary injection unit 1001 and the secondary injection unit 1002 based on the measured values of the 1010 and the monitoring unit 1020.

The reaction tank 2000 may include, for example, a mixture of any one or more of an alternating reaction tank, an aerobic tank, an anoxic tank, and a separation tank, and may include various well-known water treatment apparatuses for performing a predetermined treatment on sewage. The front and rear ends of the reaction tank 2000 may include a flow adjusting tank, a precipitation tank or a post-treatment facility, and a detailed description thereof will be omitted.

The primary injection unit 1001 and the secondary injection unit 1002 are means for injecting a coagulant, and may include a predetermined coagulant tank, a coagulant pump, a nozzle, a pipe and / or a valve, and the like. The primary injection unit 1001 and the secondary injection unit 1002 may be applied to various known techniques that can accurately control the amount of the coagulant injected in accordance with the control command of the total phosphorus control unit 1000.

Examples of the flocculant include aluminum sulfate, ferrous sulfate, ferric sulfate, ferric chloride, potassium alum, PAC (polyaluminum chloride), sodium aluminate, ammonium alum, copper chloride, ferroc, clay, calcium hydroxide, and oxidation. Iron salts, such as calcium, active silicic acid, a polymeric flocculant, or an aluminum type flocculant, etc. can be used variously, It is not limited to the said example.

Phosphor measurement unit 1010 is provided on the reaction tank 2000 side for controlling the injection amount of the primary injection unit 1001 and the secondary injection unit 1002, and phosphorus (P) included in the inflow of sewage or pretreatment water. The concentration of is measured. In the prior art, since the coagulant is injected only depending on the phosphorus concentration of the effluent, there is an uneconomical problem because it is excessively injected. In the present invention, since the measurement is performed at the reaction tank 2000 and the treated water β, Injecting less coagulant than before has the advantage of being able to manage the planned water quality.

The monitoring unit 1020 performs a function of measuring the water quality of the treated water β in this way and basically generates a detection signal measuring the phosphorus concentration of the treated water β treated in the reaction tank 2000 such as an aerobic tank. The total phosphorus control unit 1000 is collected together with the value of the phosphorus measuring unit 1010. However, the monitoring unit 1020 may be configured as a tele-monitoring system (TMS) to monitor the overall state of the treated water (β). In the case of the monitoring unit 1020, biochemical oxygen demand (BOD), chemical oxygen demand (COD), suspended matter (SS), total nitrogen (TN), and total phosphorus, which are water quality criteria items of the treated water β It can be used to automatically detect the concentration of (TP), etc., and it can be used in the form of dissolved ionic substances such as ammonia nitrogen (NH ₄ -N), nitrogen nitrate (NO ₃ -N), phosphorus phosphate (PO ₄ -P). ) Can also be detected automatically.

A total phosphorus control unit 1000 is connected to the primary injection unit 1001 and the secondary injection unit 1002 by a control line to individually control whether or not a predetermined coagulant injection and the injection amount, and the phosphorus measurement unit 1010 and The measured value from the monitoring unit 1020 is used as the determining factor of the control. In this regard, a detailed description will be made later.

3 is a block diagram for explaining the system of the sewage total phosphorus treatment system of the present invention.

The total phosphorus control unit 1000 includes a collection unit 1100 that receives measurement information from the phosphorus measurement unit 1010 and the monitoring unit 1020, and determines the water quality from the collected measurement information, and determines whether the coagulant is injected and the injection amount. The control unit 1200, the primary injection unit 1001 and the secondary injection unit 1002 may be configured to include a management and control unit 1300 connected to the control line to perform individual flocculant injection control.

The collection unit 1100 is connected to the phosphor measuring unit 1010 and the monitoring unit 1020 to collect the measurement information, in addition, the flow measurement unit 1030 is provided for the measurement of the flow rate so that the flow information is It is preferred to be collected. The flow rate information performs flow measurement of any one or more of inflow water α and return, discharge or treated water β, and calculates load for sewage treatment together with phosphorus concentration information.

In this case, it is preferable that a filtering unit (not shown) is further provided to filter noise from the measurement signals transmitted from the phosphor measuring unit 1010, the monitoring unit 1020, and / or the flow rate measuring unit 1030.

The determination unit 1200 determines whether or not injection from the primary injection unit 1001 and the secondary injection unit 1002 is performed by using the information based on the measurement signal as a factor, and performs judgment on water quality and measurement abnormality. And specific embodiments related to this will be described later.

The management and control unit 1300 mainly performs a function of generating and transmitting injection control signals from the primary injection unit 1001 and the secondary injection unit 1002, and will be described in detail for specific operations.

The collection unit 1100 and the phosphorus measuring unit 1010, the monitoring unit 1020 and the flow measurement unit 1030, the management and control unit 1300 and the primary injection unit 1001 and secondary injection unit ( The connection of 1002 may be made through a wired connection, preferably RS485 communication, in consideration of the stability of measurement and control through a predetermined input or output terminal provided in the total control unit 1000. However, the connection of the monitoring and control system includes various connection methods and does not exclude wireless connection methods such as Wifi, infrared communication, Bluetooth, and LoRa communication.

The collection unit 1100 may input and output a control command or verification signal by assigning a predetermined ID to each of the measuring means and the injection unit.

In the concept of the present invention, the total phosphorus control unit 1000 may be provided separately or independently for each load device, but may also be considered in the case where the integrated monitoring and control is performed in the central control unit (not shown). It is preferable to further include a communication unit 1400 for such remote communication, and may be considered to be connected to a central control unit or a management server (not shown) through a predetermined gateway (not shown).

The communication unit 1400 may be made using a wired or wireless Internet protocol, and various known connection methods may be applied.

Wireless communication applied to the wireless network described in the present invention is a communication scheme provided by a mobile communication network including CDMA, WCDMA, HSDPA, GSM, Wibro, 3G, 4G, LTE, LTE CatM1, and Wi-Fi (Wireless). Fidelity, Bluetooth, Infrared Data Association (IrDA), Wireless LANN (IEEE 802.11), Shared Wireless Access Protocol (SWAP), Wireless Personal Area Network (WPAN), Zigbee, LoRa (Long Range) Various methods such as a network may be applied.

The total control unit 1000 may remotely transmit water quality measurement information and management information through the communication unit 1400, and a function of simply monitoring a predetermined application in a user terminal such as a smartphone may be added.

Figure 4 is a block diagram for explaining an embodiment of the determination unit in the sewage total phosphorus treatment system of the present invention.

The determination unit 1200 mainly performs the function of judging the water quality based on the measurement information collected from each measuring unit to the collecting unit 1100 and determining the operating conditions of the injecting unit. Water judging unit 1230 for determining the water quality and flow rate of the treated water (β), and injection for judging the necessity of pre-aggregation of the inflow water (α) and the need for coprecipitation removal to further remove phosphorus at the reactor 2000 or the rear end of the reactor. The determination unit 1220 and the coagulant calculation unit 1220 for calculating the injection amount of the primary injection unit 100 and the secondary injection unit 1002 may be included.

The water quality determination unit 1230 basically determines the operating conditions of the primary injection unit 1001, and thus provides a condition capable of responding in real time to the load fluctuations flowing into the reaction tank 2000. Phosphor measurement unit 1010 is provided in the reaction tank 2000 to measure the phosphorus concentration, the reaction tank 2000 may induce a phosphorus release reaction as a bioreactor in one embodiment. The primary injection unit 1001 functions to reduce the phosphorus load of the reaction tank 2000 by preaggregation, and the inflow load determination unit 1210 is the phosphorus concentration measured by the phosphorus measurement unit 1010 and / or By determining the load according to the inflow flow rate of the inflow water (α) measured by the flow rate measuring unit 1030 to determine whether or not the total condensation.

In addition, the water quality determination unit 1230 performs a function of comparing the water quality from the measurement information on the water quality including the phosphorus concentration of the treated water β collected from the monitoring unit 1020, and discharged (or treated) The operating conditions of the flocculant are determined by comparing the water quality with the guaranteed water quality.

The injection determination unit 1210 needs to perform the preaggregation treatment and the removal of additional phosphorus from the treated water β by the operation of the primary injection unit 1001 and the secondary injection unit 1002 according to the conditions described above. The function of judging is performed. When the reaction tank 2000 is configured as a bioreactor, it may be the most economical treatment method, but since it is difficult to immediately treat in improving the water quality of the treated water β, immediately according to the function of the injection determination unit 1210, if necessary. This will improve the quality of the effluent, so it will be more efficient in real time response.

In addition, a coagulant calculation unit 1220 is provided to calculate the injection amount according to the determination condition, and specific embodiments related to the management of the water quality, the injection condition, and the injection amount will be described later.

On the other hand, the determination unit 1200 may further include an abnormality determination unit 1240, which may determine and alert when an abnormality of the measured value, and call or calculate data in the defect processing unit 1340 to be described later As a result, a function that can cope with an abnormality in real time is performed. For example, if the measured values of phosphorus concentrations over a predetermined time interval are too different from each other under the condition that the fluctuation range of the inflow load is within the set value, it may be judged as abnormal and an alarm such as a check notification for the measuring means may be performed. have.

The abnormal determination unit 1240 may transmit and update a measurement signal or a response signal for each ID of the terminal equipment connected to each terminal, and may periodically record success and failure and determine an abnormal state. Here, when the flow rate measured by the flow rate measuring unit 1030 is more than the set flow rate it may increase the reporting frequency of the phosphor measuring unit 1010 and / or the monitoring unit 1020.

However, in spite of such anomaly determination, it is preferable that the operation of the reaction tank 2000 and the sewage treatment facility is not stopped. Therefore, virtualization of predetermined measurement values can be performed to compensate for errors or deficiencies of data. Will be described later.

Figure 5 is a block diagram for explaining an embodiment of the management and control unit in the total sewage treatment system of sewage of the present invention.

The operating conditions of the primary injection unit 1001 and the secondary injection unit 1002 are determined according to the determination result of the determination unit 1200, the coagulant control unit 1320 according to the calculation result of the coagulant calculation unit 1220. Transmits a control signal to each injection unit. This may be set variously according to the conditions of the pre-aggregation process and co-precipitation process, a specific embodiment thereof will be described later.

The management and control unit 1300 may further include an alarm unit 1330, and performs a function of notifying the user when determining that the measurement value is abnormal or missing. At this time, the communication unit 1400 is a user terminal or a central control server, etc., the measuring unit 1010, the monitoring unit 1020, the flow measuring unit 1030, the primary injection unit 1001, the secondary injection unit 1002 It may be able to inform the operation abnormal state, and may additionally perform a function of determining and alarming the abnormal state of the sewage treatment system, such as the reaction tank (2000) in the monitoring of the water quality.

In addition to providing such an alarm, when an abnormality or a loss of a measured value occurs due to a failure of the phosphorus measuring unit 1010 or the like, it is necessary to replenish the missing value for the continuous operation of the sewage treatment system. If any one or more of the configuration problem occurs by supplementing the measurement information to ensure that the normal operation until the check is made. As an example, when the previous phosphorus measurement value and the current measurement value are too large, it is determined that an abnormality has occurred, and the injection control of the coagulant is continuously performed through the average value of N measured values of the immediately set time interval or the user input value. Can be lost. Accordingly, the defect processing unit 1340 generates a virtual measured value when an abnormality or a defect of the measured value of the phosphorus measuring unit 1010 or the monitoring unit 1020 occurs.

In addition, the history management unit 1350 may be further included. The history management unit 1350 may include data such as past measurement information, water quality, and operation of the injection unit in a database provided in the total control unit 1000 or the central control server. Can be stored and managed time series.

The history management unit 1350 may provide statistics such as monthly usage of the coagulant, usage compared to the same month of the previous year, cumulative usage of the year, and the like based on the amount of the coagulant injection and the operating time of the injector, The aerobic concentration pattern may be compared and displayed as a table or graph on the display of the user terminal or the central control server.

The history management unit 1350 may store information on the use period of the equipment such as the phosphorus measuring unit 1010, replacement time of consumables, replenishment of flocculant, and the like, and generate information to perform notification when the cycle is reached. .

6 is a flow chart illustrating a total phosphorus treatment method for sewage according to the concept of the present invention.

Phosphorus (PO ₄ ^3- ) dissolved in sewage can be converted to insoluble phosphorus (AlPO ₄ ) through a reaction as shown below. In this case, however, an aluminum-based flocculant is used and the concept related to the use of various flocculants for converting the dissolved phosphorus into insoluble phosphorus is also included in the present invention.

Basically, the phosphorus measurement unit 1010 and the monitoring unit 1020 start the measurement of the phosphorus concentration for the inflow water α (to the reaction tank) and the treated water β (to the discharge water). The treated water phosphorus concentration (P _TMS ) and the aerobic tank phosphorus concentration (P _O ) are collected. (S1010)

Phosphorus concentration and injection amount or target value may be set as an initial value before the collecting step S1010 and the variation may be made according to measurement information collected in real time, which will be described in detail below.

As a second step, it is determined whether or not the treated water phosphorus concentration (P _TMS ) is abnormal (S1110), in which case the target phosphorus concentration (P _f ) is prepared. If the treated water phosphorus concentration P _TMS is equal to or greater than the target phosphorus concentration P _f , an alarm is generated through the alarm unit 1330 (S1140) and an alarm signal is transmitted to a user terminal or a central control server. Along with such an alarm signal generation, the process proceeds to the alarm processing (S2140) step.

The target phosphorus concentration P _f may be variously set depending on the setting, but may be preferably set to 0.2 ppm.

In the second step, when the treated water phosphorus concentration P _TMS is less than the target phosphorus concentration P _f , the condition in the aerobic tank (or influent) is determined.

As a third step, it is determined whether the aerobic basal phosphorus concentration (P _O ) is less than the reference phosphorus concentration (P _st ) (S1120), and if both conditions are satisfied, the total coagulation by the primary injection unit 1001 is reduced. (S2110). In this case, it is possible to reduce the amount of flocculant and to shorten the operating time of the injection part, thereby improving economic efficiency.

When the aerobic basin concentration (P _O ) is greater than the reference phosphorus concentration (P _st ) in the third step to further determine whether the aerobic basin concentration (P _O ) is less than the critical phosphorus concentration (P _c ) as a fourth step (S1130) It is preferable. If the condition is satisfied, the primary injection unit 1001 may be controlled to increase pre-aggregation (S2120).

If it is determined in step 4 that the aerobic tank phosphorus concentration (P _O ) is greater than or equal to the critical phosphorus concentration (P _c ) to enter the attention processing step (S2130). In this case, an alarm may be performed through the alarm unit 1330. The careful treatment step may be performed together with pre-aggregation and co-precipitation.

In the above process, the injection amount of the primary injection unit 1001 for preaggregation and the injection amount of the secondary injection unit 1002 for co-precipitation may be determined by the following equation.

Pre-agglomerate injection rate: inflow flow rate (Q) x pre-aggregation target (△ P ₁ ) x pre-aggregation molar ratio (R ₁ )

Coprecipitation injection volume: Inflow rate (Q) x Coprecipitation target (△ P ₂ ) x Coprecipitation molar ratio (R ₂ )

In the pre-agglomeration reduction (S2110) step, the treated water phosphorus concentration (P _tms ) and the aerobic tank phosphorus concentration (P _O ) are the lowest stages that satisfy a predetermined condition, so that co-precipitation may be maintained and operate to reduce pre-agglomeration.

Preaggregation target (△ P ₁ ) = preaggregation target (△ P ₁ ) -preaggregation increase and decrease (γ)

Acupuncture Target (△ P ₂ ) = 0

It can be determined as follows. At this time, the left side is the value updated in the coagulant calculation unit 1220, it can be understood that the right side is the previous value.

In the pre-aggregation increase step (S2120), the treated water phosphorus concentration (P _tms ) may be satisfied, but the aerobic basin phosphorus concentration (P _O ) may be considered to be somewhat high, in which case only pre-aggregation may be increased. At this time, the aerobic basin phosphorus concentration (P _O ) is a case where the standard phosphorus concentration (P _st ) or more and less than the critical phosphorus concentration (P _c ).

Preaggregation target (△ P ₁ ) = preaggregation target (△ P ₁ ) + preaggregation increase and decrease (γ)

Acupuncture Target (△ P ₂ ) = 0

In the caution treatment (S2130), the treated water phosphorus concentration (P _tms ) may be satisfied, but the aerobic tank phosphorus concentration (P _O ) may be considered to be greater than or equal to a threshold value. All of the secondary injection unit 1002 can be controlled fluctuation.

Preaggregation target (△ P ₁ ) = preaggregation target (△ P ₁ ) + preaggregation increase and decrease (γ)

Co-precipitation target (△ P ₂ ) = aerobic basal phosphorus concentration (P _O ) -critical phosphorus concentration (P _c )

In the alarm processing step (S2140), since the treated water phosphorus concentration (P _tms ) is high, it is necessary to adjust the overall discharge water quality, and may be adjusted as follows.

Preaggregation target (△ P ₁ ) = preaggregation target (△ P ₁ ) + preaggregation increase and decrease (γ)

Co-precipitation target (△ P ₂ ) = aerobic basal phosphorus concentration (P _O )-emergency phosphorus concentration (P _e )

7 is a view showing an application example of the total sewage treatment system of sewage of the present invention.

The sewage total phosphorus treatment system of the present invention may be applied to various sewage treatment systems, regardless of combination conditions such as complex or variable precipitation, anoxic, aerobic, stirred, chemical treatment, and the like.

In FIG. 7A, the biological reaction tank 2010 is configured as a single reaction tank, and the primary injection part 1001 for pre-aggregation control is formed on the influent (α) side and treated water (β) becomes effluent. The secondary injection part 1002 for co-precipitation is comprised by the side. The bioreactor is composed of an anoxic tank and an aerobic tank and has a rectangular or rectangular structure, and at the bottom, it may be composed of an air diffuser and a blower for supplying air of activated sludge. When aerated sewage containing activated sludge and organic matter (BOD, COD) and nutrients (TN, TP) such as total phosphorus is aerated for a certain period of time while agitated while supplying oxygen, aerobic bacteria and protozoa oxidize / decompose organic matter biochemically. It will remove organics and nutrients from the sewage. The phosphorus measuring unit 1010 may be configured in the bioreactor 2010, and the monitoring unit 1020 may be configured on the discharge line of the treated water β.

In FIG. 7B, the primary precipitation tank 2021 is configured at the front end of the reactor 2000, and the secondary precipitation tank 2022 is configured at the rear end of the reactor 2000. Inflow (α) refers to a water body in which the primary precipitation is completed from the primary precipitation tank 2021, and the primary injection unit 1001 performs preaggregation with this. For example, the primary sedimentation tank 2021 has a rectangular shape and is formed by mixing and coagulating the solid water particles in the influent sewage, the companion water of the dehydration facility, and the digestive water generated in the activated sludge digester and the iron polysulfate (PCSFe). The sludge to be precipitated by sedimenting the solid particles generated is removed using a sludge collector to prevent decay, and a scum removal device that can remove scum due to the flotation and the poor sedimentation of the precipitated sludge can be attached to the top. have. In addition, the treated water β is introduced into the secondary settling tank 2022 to perform secondary precipitation, and the formation of flocs by the secondary injection unit 1002 during the secondary precipitation will be increased. Secondary sedimentation tank 2022 is a sludge generated by biological treatment in the bioreactor to produce a clear and clean treated water. Generally, it is a circular radial type sedimentation type, and a sludge collector is installed at the lower part to draw out the sludge to supply activated sludge to the bioreactor, and some surplus sludge can be sent to the concentrating tank for dewatering to be processed. Through this, clean treated water can be produced and transferred to the post-stage process. In addition, a digester, a dehydration facility, a coagulation stirring tank, etc. may be applied, and various known configurations for this may be applied.

In the present invention, since the installation can be performed only by adding or changing the phosphorus measuring unit 1010 and the injecting unit of the flocculant without changing the existing sewage treatment system, the burden of the facility is reduced.

In addition, since the injection of the coagulant injection unit of the primary injection unit and the secondary injection unit under various conditions according to the state of the treated water as well as the reaction tank of the aerobic tank can be improved dramatically.

In particular, problems such as excessive processing and blockage of the conventional flocs can be easily solved only by the control of logic, and it is possible to immediately respond to the flow rate or contamination level, so that the water quality can be stably maintained and the plan of the facility It is advantageous in operation.

In addition, since the quality and condition of sewage treatment can be monitored remotely through a wireless communication network, there is an advantage that the integrated control of each point can be efficiently carried out, and the economics and reliability in facilities and maintenance are improved. .

In the above, the present invention has been described in detail based on the embodiments and the accompanying drawings. However, the scope of the present invention is not limited by the above embodiments and drawings, and the scope of the present invention will be limited only by the contents described in the claims below.

1000 ... Total phosphorus processing part 1001 ... Primary injection part
1002 ... Secondary injection unit 1010 ... Person measurement unit
1020 monitoring unit 1030 flow measurement unit
1100 ... Collection 1200 ... Decision
1210 ... Injection judgment 1220 ... Coagulant calculation
1230 Water quality judgment 1240
1300 ... Management and control unit 1320 ... Agglomeration control unit
1330 Alarm unit 1340 Deficiency unit
1350 ... History 1400 ... Communication
2000 Reactors 2010 Bioreactors
2021 ... First Precipitator 2022 ... First Precipitator

Claims (6)

A phosphorus measuring unit 1010 installed inside the reactor 2000 to measure an aerobic phosphorus concentration (P _O );
A primary injection unit 1001 for injecting a flocculant into the inflow water side of the reaction tank;
A secondary injection unit 1002 for injecting a flocculant into the reaction tank or the treated water of the reaction tank;
Monitoring unit 1020 for measuring the treated water phosphorus concentration (P _tms ); And
Collecting unit 1100 for collecting the measurement signal from the phosphorus measuring unit and the monitoring unit, water determination unit 1230 for determining the water quality based on the phosphorus concentration measurement value and injection determination for performing the operation condition of the coagulant injection A total control unit 1000 including a determination unit 1200 having a unit 1210 and a management and control unit 1300 for controlling the primary injection unit and the secondary injection unit based on the determination of the determination unit. ,
The injection determination portion,
If the treated water phosphorus concentration (P _tms ) is less than the target phosphorus concentration (P _f ) and the aerobic basal phosphorus concentration (P _O ) is less than the reference phosphorus concentration (P _st ), the injection volume of the primary injection portion is decreased, and the treated water phosphorus concentration (P _tms ) is increased below the target phosphorus concentration (P _f ) and the aerobic basal phosphorus concentration (P _O ) is above the reference phosphorus concentration (P _st ) and below the critical phosphorus concentration (P _c ), increasing the injection volume of the primary injection portion and If the concentration (P _tms ) is less than the target phosphorus concentration (P _f ) and the aerobic basal phosphorus concentration (P _O ) is more than the critical phosphorus concentration (P _c ), the injection volume of the primary injection portion and the secondary injection portion is increased, and the treated water phosphorus concentration is increased. When (P _tms ) is equal to or higher than the target phosphorus concentration (P _f ), the injection amount of the primary injection portion and the secondary injection portion is increased.
The total phosphorus control unit,
The determination unit transmits and updates a measurement signal or a response signal for each ID of the phosphor measurement unit or the monitoring unit, and measures when the measured phosphorus concentration is higher than the previously measured phosphorus concentration or when there is a loss of the phosphorus concentration measurement value. An abnormal determination unit 1240 is determined to determine that the value is abnormal, and the management and control unit performs an injection determination by generating a virtual phosphorus concentration value for the phosphorus concentration measurement value determined as abnormal in the abnormal determination unit. Total sewage treatment system of sewage having a defect processing unit (1340) to ensure that the primary injection portion and the secondary injection portion to operate normally until this is done.
The method of claim 1,
The defect processing unit 1340,
Total sewage treatment system for sewage, which determines the average of the measured phosphorus concentrations at a set time interval as a hypothetical phosphorus concentration.
The method of claim 1,
Further comprising; flow rate measuring unit 1030 for measuring the flow rate of the inflow or treated water,
The phosphorus measuring unit and the monitoring unit, the total phosphorus treatment system of sewage to increase the frequency of reporting when the flow rate measured in the flow rate measuring unit is more than the set flow rate.
The method of claim 1,
The total phosphorus control unit,
The management and control unit has an alarm unit 1330 for alarming when the treated water phosphorus concentration (P _tms ) is more than the target phosphorus concentration (P _f ),
The sewage total phosphorus treatment system further comprising; a communication unit (1400) for transmitting the usage amount of the alarm and flocculant to the user terminal.
The method of claim 3,
The determination unit,
Total sewage treatment system of the sewage having an inflow load determination unit 1210 to determine the pre-aggregation and the degree according to the phosphorus concentration measured by the phosphorus measuring unit and the flow rate of the influent water measured by the flow rate measuring unit.
The method of claim 1,
The management and control unit,
Based on the amount of coagulant injected and the operating time of the injector, the monthly usage of coagulant, the year-on-year usage, the cumulative usage statistics of the year and the aerobic concentration pattern are compared and provided to the user terminal as a table or graph. Total sewage treatment system of sewage having a history management unit (1350) to perform a notification upon the arrival of the flocculant replenishment cycle.

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