KR101240237B1 - Polluted sewage sample former disposal system and operation method thereof - Google Patents

Abstract

PURPOSE: A waste water sample pretreatment system and an operation method thereof are provided to control time and range for denitrification and to shorten working hours. CONSTITUTION: A method for operating a waste water sample pretreatment system comprises: a step of switching on or off a plurality of valves(31,53,57) together with a pump(11) comprising a sample container unit(60) according to logic; a step of collecting waste water with suspended solid from a waste water purifying tank(200); a step of completely removing the suspended solid and obtaining a filtering sample, and a step of accurately measuring the phosphorus concentration. [Reference numerals] (AA) Washing water

Description

Wastewater sample pretreatment system and operation method {Polluted Sewage Sample Former Disposal System and Operation Method}

The present invention relates to an effluent sample pretreatment, in particular, the phosphorus concentration can be measured completely eliminated by the suspended solids (Suspended Solids) contained in the waste water, and measured almost in real time from the waste water that changes the phosphorus concentration from time to time It is directed to an operated water sample pretreatment system and a method of operating the exact phosphorus concentration that can be provided as data to determine the coagulant dose.

In general, phosphate in wastewater, such as sewage and wastewater, contributes to phytoplankton propagation along with nitrogen, which promotes eutrophication of worsening water quality.

Therefore, in the sewage treatment plant, biological treatment of wastewater and removal of phosphorus prevents eutrophication of deteriorated water quality of rivers or rivers by inflow of purified wastewater.

To this end, the sewage treatment plant detects phosphorus content from waste water and then uses a coagulant to remove phosphorus. Usually, a flocculant can use polyaluminum chloride (PAC).

However, in order for the coagulant to be administered, the concentration of phosphorus contained in the wastewater must first be accurately measured and the correct dose of the coagulant adjusted to the correct phosphorus concentration must be determined.

To this end, a certain amount of sample is extracted from the waste water, the phosphorus concentration detector detects the phosphorus content from the extracted sample, and then a coagulant is administered based on the measured phosphorus concentration. Matching with the phosphorus concentration is performed.

However, in the extraction method and the analysis method using the phosphorus concentration meter, the removal of suspended solids in the extracted sample should be performed first.

This is because the extracted sample may contain suspended solids at concentrations of up to about 5,000 ppm, and in this state, even if the phosphorus concentration is measured from the extracted sample, the exact concentration of the coagulant is calculated by not displaying the actual phosphorus concentration. Because it can not be.

Therefore, in the sampling method and the analysis method using the phosphorus concentration meter, the removal of suspended solids included in the extracted sample must be performed first, so that the one-time phosphorus concentration time is excessively consumed (about 1 hour). There is no choice but to.

Domestic registered patent 10-0869943 (November 17, 2008)

The patent document shows an example of a sewage altitude treatment apparatus that can control the time and range of nitrification denitrification reaction by controlling the relative length of the reaction sheet, and change the flow rate of sampling waste water to reduce the working time as necessary. .

To this end, the patent document is equipped with a reaction vessel having a partition for controlling the flow of the flow rate, the reaction sheet for measuring the concentration of nitrogen and phosphorus in the water passing through the outlet is attached to the cell for nitrification, flow in response to the flow rate change It consists of a three-way valve that changes.

However, in all cases including the patent literature, in order to calculate the flocculant dose, the suspended solids are removed from the sample extracted from the wastewater, but the suspended solids are lowered to about 10 ppm by reducing the suspended solids from the sample. (Suspended Solids) effects can be completely eliminated, from which accurate phosphorus concentrations can be determined.

However, the patent document discloses a reaction tank for sampling wastewater containing a large amount of suspended solids by applying a plurality of devices to relatively adjust the length of the reaction sheet for measuring the concentration of nitrogen and phosphorus and the space divided into a plurality of partition walls. Suspended solids cannot be used to accurately measure phosphorus concentration.

Therefore, in the above patent document, the measurement of the phosphorus concentration is affected by the suspended solids (Suspended Solids), thereby having the same difficulty caused by the suspended solids (Suspended Solids).

Thus, the present invention in view of the above point is to sample the raw material as it is without removing the suspended solids (Suspended Solids) even in the case of high waste water (Suspended Solids) no matter how high, the suspended solids ( By measuring the concentration of phosphorus completely removed from the effect of Suspended Solids, the overdose of flocculant for phosphorus removal is prevented, and in particular, the exact phosphorus concentration can be measured and provided in near real time from wastewater where phosphorus concentration changes from time to time. The objective is to provide a water sample preparation system and its operation.

The wastewater sample pretreatment system of the present invention for achieving the above object is a sample reservoir in which sampling raw water containing suspended solids is collected from wastewater pumped in a wastewater purification tank, and the suspended solids from the sampling raw water. A container comprising a filtration membrane for filtering the suspended solids, and a sample reservoir for collecting the filtered sample sample passing through the filtration membrane;

A plurality of pipes for pumping the sampling raw water into the container, discharging the sampling raw water and the filtered sample sample from the container, and discharging the washing water including the suspended solids removed from the filtration membrane. A piping system provided with at least one electric machine on each of which is controlled on and off;

A phosphate measurement unit for measuring phosphorus concentration from the filtered sample sample;

Pumping the sampling raw water, measuring the phosphorus concentration in the filtered sample sample, and discharging the washing water including the sampling raw water, the filtered sample sample, and the suspended solids in stages. A control unit incorporating sample preparation logic to control the electric machine on and off; It is characterized by the included.

The piping system is connected to the wastewater purification tank and the sample reservoir, and has a sample extraction line installed with a pump that is controlled on and off by the control unit; An overflow line connected to an overflow outlet of the sample reservoir and discharging the excessively introduced sampling raw water; A washing water line connected to the sample reservoir to remove the suspended solids adhered to the filtration membrane, and having a washing water valve on and off controlled by the control unit; A sample sampling line connected to the phosphate measuring unit from the sample reservoir to supply the filtered sample sample to the phosphate measuring unit; A sample drain line connected to the sample reservoir and provided with a sample drain valve on and off controlled by the control unit; And a sample drain line connected to the sample reservoir and provided with a sample drain valve on and off controlled by the control unit.

The sample extraction line is further provided with a return line from the rear end of the pump to the waste water purification tank, and bypasses the front end of the pump with the auxiliary pump that is controlled on and off to the control unit. More lines are installed.

The washing water line is further provided with a washing water nozzle for spraying the washing water toward the filtration membrane.

The sample drain line and the sample drain line are connected to the overflow line.

In addition, the operating method of the wastewater sample pretreatment system of the present invention for achieving the above object includes a measurement start step of recognizing a time point at which the measurement cycle is reached;

A sampling mode step of pumping the waste water together with the suspended solids in the waste water purification tank and collecting the pumped waste water into a sample reservoir containing the suspended solids as a sampling source containing the suspended solids;

A filtration mode step of filtering the sampling raw water through a filtration membrane to remove the suspended solids from the sampling raw water, and collecting the waste water from which the suspended solids are removed to a sample reservoir as a filtered sample sample;

A measurement mode step of measuring phosphorus concentration of the filtered sample sample;

When the phosphorus concentration measurement is completed, the washing mode step of removing the suspended solids (Suspended Solids) adhered to the filtration membrane by introducing the washing water;

A drain mode step of draining the sample reservoir and the sample reservoir when the washing water is completed; Characterized in that performed.

The supply of sampling raw water is carried out for a time T1, the filtered sample sample is collected for a time T2, the phosphorus concentration is measured for a time T3, and the washing water is sprayed for a time T4.

After the filtration mode step is completed, a sampling raw water draining step of discharging all the sampling raw water collected in the sample reservoir is further performed, and the sampling raw water draining step is performed together with the measuring mode step.

After the drain mode step is made, the standby mode step of maintaining the standby state during the operating time in which the flocculant is administered based on the phosphorus concentration in the waste water treatment facility; Is further performed.

In the present invention, even if the wastewater having a high content of suspended solids is sampled without removing the suspended solids in advance, the influence of the suspended solids is completely removed from the sampled wastewater. By measuring the phosphorus concentration, there is an effect that the accurate phosphorus concentration is measured from any wastewater.

In addition, the present invention can accurately calculate the dosage of the flocculant for phosphorus removal by measuring the phosphorus concentration of the wastewater in the state that the suspended solids concentration is removed to about 10 ppm from the sampled wastewater, in particular, the phosphorus concentration With the correct dosage of the coagulant, it is possible to prevent adverse effects due to the overdose of the coagulant and to prevent excessive consumption of the coagulant.

In addition, the present invention has the effect that the accurate phosphorus concentration is measured in real time from any waste water by accurately measuring the phosphorus concentration from the waste water that changes the phosphorus concentration from time to time without the influence of suspended solids (Suspended Solids).

In addition, the present invention is the suspended solids removal device and the phosphor measuring device by measuring the phosphorus concentration by sampling as it is without removing the suspended solids in advance, even if the waste water with a high content of the suspended solids (Suspended Solids) Can be integrated into a single module, and by using a modular device, the wastewater treatment plant can be configured more simply.

1 is a block diagram of a wastewater sample pretreatment system according to the present invention, Figure 2 is a flow chart of the wastewater sample pretreatment system according to the present invention, Figure 3 is a valve operating state of the wastewater sample pretreatment system according to the operating flow of the present invention 4 is an operating state of a sample container unit according to the present invention, and FIG. 5 is a configuration of a wastewater treatment facility to which a wastewater sample pretreatment system according to the present invention is applied.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Since the exemplary embodiments of the present invention may be embodied in various different forms, one of ordinary skill in the art to which the present invention pertains may be described herein. It is not limited to the Example to make.

1 shows a configuration of a wastewater sample preparation system according to the present embodiment.

As shown, the wastewater sample pretreatment system 100 is a filtering sample in which wastewater flows into the sampling raw water along with the suspended solids, and completely removes the suspended solids that affect the phosphorus concentration from the sampling raw water. A sample rack unit 60 in which a sample is made; A phosphate measurement unit 70 for measuring phosphorus concentration from the filtered sample sample; Control unit 80 is provided with a sample preprocessing logic for repeating one cycle (Cycle) in a predetermined period (Period) to measure the phosphorus concentration of the sampling raw water extraction and filtering sample sample and the washing and draining by the washing water step by step; It is composed.

The sample rack unit 60 is a container in which waste water is introduced into the sampling raw water together with the suspended solids, and a filtering sample sample from which the suspended solids affecting the phosphorus concentration is completely removed from the sampling raw water. (1) is included.

To this end, the container 1 is a sample reservoir (3) for collecting the waste water pumped together with the suspended solids (Suspended Solids) from the waste water purification tank 200 as the sampling raw water, and the sample reservoir 3 is formed Filtering membrane (5) to filter the suspended solids contained in the sampling raw water in the state of blocking the space, and collecting raw water from which the suspended solids are removed through the filtering membrane (5) as a filtering sample sample. It consists of the sample reservoir 7.

An overflow outlet is further formed in the sample reservoir 3, and the overflow outlet discharges the sampling raw water that has been introduced in excess of the flow rate required for sampling to the recovery tank 200A. .

Membrane type is applied to the filtration membrane 5, but a woven wire screen type that can filter out all the sizes of suspended solids of wastewater may also be applied.

In particular, the suspended solids of the wastewater are suspended in the filtration membrane 5 so that the concentration of the suspended solids in the filtered sample sample may be lowered to about 10 ppm or less.

The sample reservoir 7 further includes a sample holding stage 9 positioned at a height relatively lower than the height of the sample reservoir 3 with respect to the ground, and a filtering sample sample is placed at the sample holding stage 9. By gathering, the formation time of the sample sample flow rate required for phosphorus concentration measurement can be relatively shortened.

In addition, the sample rack unit 60 pumps the sampling raw water into the container 1, discharges the sampling raw water and the filtered sample sample from the container 1, and removes the suspended solids removed from the filtration membrane 5. A piping system consisting of a plurality of pipes for discharging the washing water containing Suspended Solids) is further provided, and each pipe is provided with an electric machine that is controlled on and off.

In this embodiment, the electric machine includes an electric valve and an electric pump.

The piping system for this purpose is a sample extraction line 10 for pumping wastewater containing suspended solids from the wastewater purification tank 200 and supplying the raw water to the sample reservoir 3 and the sample reservoir 3. Overflow line 20 for discharging excess raw water introduced into the recovery tank 200A, and removing the suspended solids stuck to the filtration membrane 5 after the phosphorus concentration measurement is completed. Washing sample line (30) for washing), a sample sampling line (40) for extracting the filtered sample sample from the sample reservoir (7) in which the filtering sample sample is collected to measure the phosphorus concentration, and one cycle (Cycle) for measuring the phosphorus concentration After the end) is composed of a drain line 50 for discharging all the contents of the container 1 to the recovery tank (200A).

The sample extraction line 10 forms a layout from the wastewater purification tank 200 to the sample reservoir 3, and the pump 11 controlled on and off by the control unit 80 at an arbitrary position. Is installed.

In this embodiment, the sample extraction line 10 is further provided with a return line 13 leading to the waste water purification tank 200 at the rear end of the pump 11, and at the front of the pump 11 together with the auxiliary pump 17. The bypass line 15 which connects the rear end is further installed.

The bypass line 15 may supply the sampling raw water to the sample reservoir 3 through the auxiliary pump 17 driven when the pump 11 fails. Therefore, a fail-safe function may be implemented in the sample extraction line 10.

The overflow line 20 is connected to an overflow outlet of the sample reservoir 3 to form a layout leading to the recovery tank 200A, from which sampling raw water excessively introduced into the sample reservoir 3 flows. By being discharged, an appropriate sampling raw water can always be maintained in the sample reservoir 3.

The wash water line 30 forms a layout connected to the sample reservoir 7, and at an arbitrary position, a wash water valve 31 controlled on and off by the control unit 80 is installed and ends. The site is provided with a washing water nozzle 33 for spraying the washing water.

The washing water nozzle 33 sprays the washing water toward the filtration membrane 5 in the inner space of the sample reservoir 7 so that suspended solids adhered to the filtration membrane 5 can be completely removed.

In the present embodiment, the washing water nozzle 33 may be made of a 360-degree spraying structure so as to evenly spray the washing water into the internal space of the sample reservoir (7), from which the sample reservoir (with the cleaning of the filtration membrane 5) The interior space of 7) can also be cleaned together.

The sample sampling line 40 forms a layout from the sample holding stage 9 of the sample reservoir 7 to the phosphate measuring unit 70, through which the phosphate measuring unit 70 uses the collected filtered sample sample. By measuring the concentration of phosphorus, the concentration of phosphorus completely excluded from the influence of suspended solids can be measured.

The drain line 50 forms a layout including a sample drain line 51 connected to the sample reservoir 3, and a sample drain line 55 connected to the sample top end 9 of the sample reservoir 7. A sample drain valve 53 on and off controlled by the control unit 80 is installed at an arbitrary position of the sample drain line 51, and a control is provided at an arbitrary position of the sample drain line 55. A sample drain valve 57 that is controlled on and off by the unit 80 is provided.

In this embodiment, the sample drain line 51 and the sample drain line 55 are connected to the overflow line 20 leading to the recovery tank 200A, so that the layout of the drain line 50 can be simplified. .

The phosphate measurement unit 70 is implemented to detect the concentration of phosphorus from the filtered sample sample and calculate the concentration value, which is the same as a conventional phosphate measurement. The controller unit 80 may be a programmable logic controller (PLC) or a computer in which the above-described sample preparation logic is embedded.

The wastewater purification tank 200 or the recovery tank 200A is the same as the components of the primary sedimentation basin constituting the wastewater treatment facility.

On the other hand, Figure 2 shows the operation flow of the wastewater sample pretreatment system according to the present embodiment.

S10 is a step in which the sample preparation logic of the wastewater sample preparation system is executed when the measurement cycle is reached.

The sample pretreatment logic executed in S10 consists of ladder logic in which the sampling mode of S20, the filtration mode of S30, the measurement mode of S40, the washing mode of S50, and the drain mode of S60 proceed sequentially.

Therefore, when the sample preparation logic is executed, the pump and the plurality of valves constituting the piping system are turned on or off, and the wastewater together with the suspended solids in the wastewater purification tank according to the procedure of the ladder logic. After the sample source is introduced and the raw water is supplied, and the filtering sample sample is completely filtered out of the suspended solids, the phosphorus concentration is completely removed from the filtered sample sample. After completion of the phosphorus concentration measurement, the drainage process using the washing water is automatically performed, thereby completing one cycle (Cycle), which is repeatedly performed according to a set period (Period).

Hereinafter, the sampling mode of S20, the filtration mode of S30, the measurement mode of S40, the washing mode of S50 and the drain mode of S60 will be described in detail.

When the sampling mode of S20 is executed, wastewater is supplied to the sample reservoir together with suspended solids from the wastewater purification tank, and sampling raw water is collected in the sample reservoir.

In this state, the operation of the electric machine forming the piping system of the wastewater sample preparation system is performed as shown in FIG. 3.

As shown, while the filtration 1 stage is performed in the sampling mode of S20, the pump 11 for sampling is switched on () n, while the washing water valve 31, the sample drain valve 53, and the sample drain valve are All 57 remain in the Off state and remain closed.

In the present embodiment, the sampling mode of S20 is performed for a predetermined time T1, but this may be variably adjusted according to the wastewater state flowing into the wastewater treatment facility. T1 is in seconds.

In this operation, the control unit 80 that recognizes the start time of the measurement cycle of S10 switches the pump 11 from off to on, and the driven pump 11 is a wastewater purification tank 200. It is realized by pumping wastewater with Suspended Solids.

Therefore, the wastewater pumped through the sample extraction line 10 flows into the sample reservoir 3 of the container 1 together with the suspended solids.

As a result of this, as shown in FIG. 4, the sampling mode of S20 is performed, and thus, the wastewater containing suspended solids is introduced into the sample reservoir 3 of the container 1, and the sample reservoir 3 is introduced into the sample reservoir 3. Wastewater containing collected solids is treated as sampling raw water (A).

At this time, the waste water exceeding the capacity of the sample reservoir 3 of the container 1 is discharged to the overflow outlet of the sample reservoir 3, and the waste water discharged to the overflow outlet is the overflow outlet. It is discharged to the recovery tank 200A through the overflow line 20 connected to the overflow outlet.

The recovery tank 200A may be the same as the waste water purification tank 200.

On the other hand, when the filtration mode of S30 is executed, the raw water collected in the sample reservoir is filtered using a filtration membrane to produce a filtered sample sample.

In this state, the operation of the electric machine forming the piping system of the wastewater sample preparation system is performed as shown in FIG. 3.

As shown, the sampling pump 11 is switched off by performing the filtration step 2 in the filtration mode of S30, while the washing water valve 31, the sample drain valve 53 and the sample drain valve 57 All are closed and remain closed.

In this embodiment, the filtration mode of S30 is performed for a predetermined time T2, but this can be variably adjusted according to the performance of the filtration membrane 5 of the container 1. T2 is in minutes (Min).

As a result of this, FIG. 4 shows that as shown in FIG. 4, the supply of sampling raw water A is stopped in the sample reservoir 3, and the sampling raw water A collected in the sample reservoir 3 is collected through the filtration membrane 5. You will exit to 7).

In this process, the suspended solids contained in the sampling raw water A are filtered out of the filtration membrane 5 so that only the waste water without the suspended solids is filled in the sample reservoir 7. Filtering sample sample (a) can be obtained.

In particular, the filtered sample sample (a) is gathered into the sample fixed end (9) of the sample reservoir (7), the sample collection (9) is relatively low relative to the height of the sample reservoir (3) to the ground By being positioned at a height, the time for collecting the filtered sample a can be relatively quick.

On the other hand, when the measurement mode of S40 is executed, the filtered sample is collected by the phosphate measuring unit to measure the phosphorus concentration.

In this state, the operation of the electric machine forming the piping system of the wastewater sample preparation system is performed as shown in FIG. 3.

As shown, in the measurement mode of S40 by performing sampling standby, the sampling pump 11 is kept off, and the sample drain valve 53 is turned on to be switched to the open state. On the other hand, both the washing water valve 31 and the sample drain valve 57 are kept in an off state (Close).

In this embodiment, the measurement mode of S40 is performed for a predetermined time T3, but this can be variably adjusted according to the performance of the phosphate measuring unit 70. T3 is in minutes.

4 is a result of this, as shown, the phosphate measuring unit 70 obtains the filtering sample sample (a) collected from the sample holding line 9 of the sample reservoir 7 from the sample sampling line 40, and obtained The phosphorus concentration is measured in the filtered sample (a).

At this time, the filtered sample (a) is a state in which there is almost no suspended solids (Suspended Solids), even if the suspended solids (Suspended Solids) has been experimentally proved that the suspended solids concentration of less than about 10ppm.

In addition, when the measurement mode of S40 is executed, the sampling raw water A filled in the sample reservoir 3 is collected into the overflow line 20 through the sample drain line 51 and then through the overflow line 20. It is discharged to the recovery tank 200A.

The recovery tank 200A may be the same as the waste water purification tank 200.

On the other hand, when the washing mode of the S50 is executed, the washing water is supplied to the container, and the washing water removes all of the suspended solids stuck to the filtration membrane.

In this state, the operation of the electric machine forming the piping system of the wastewater sample preparation system is performed as shown in FIG. 3.

As shown, the backwash is performed in the washing mode of S50, so that the sampling pump 11 is kept off and the sample drain valve 53 is kept open, while the washing water valve 31 is maintained. And the sample drain valve 57 are also turned on and are switched to the open state.

In this embodiment, the washing mode of S50 is performed for a predetermined time T4, but this may be variably adjusted according to the state of suspended solids stuck to the filtration membrane 5 of the container 1. T4 is in minutes.

4 shows this result, as shown, the control unit 80 supplies the washing water to the sample reservoir 7 through the washing water line 30, and the supplied washing water is filtered through the washing water nozzle 33. Suspended Solids adhering to the filtration membrane 5 is removed by the hydraulic pressure by spraying on.

In this case, the washing water sprayed to the filtration membrane 5 through the washing water nozzle 33 may also wash the internal space of the sample reservoir 7, so that the influence of the sampling waste water extracted at the next sampling cycle may be completely excluded. .

On the other hand, when the drain mode of S60 is executed, the sample reservoir and all contents remaining in the sample reservoir are discharged, thereby emptying the inside of the container and preparing to perform the next cycle.

In this state, the operation of the electric machine forming the piping system of the wastewater sample preparation system is performed as shown in FIG. 3.

As shown, in the drain mode of S60, the drainage is performed to keep the sampling pump 11 off, while the sample drain valve 53 and the sample drain valve 57 remain open. The washing water valve 31 is switched off and is switched to the closed state.

In particular, in the present embodiment, the drain mode of S60 is performed until the start of the next filtration, but the division of the start and the end of the filtration can be variably adjusted according to the set measurement cycle by making the measurement cycle.

As a result of this, Fig. 4 shows that the control unit 80, as shown, is suspended with the new reservoir in the sample reservoir 3 together with the filtered sample a which remains in the sample reservoir 7 of the container 1. It is operated to drain the wash water containing the solids.

That is, the wash water containing the suspended solids collected in the sample reservoir 3 is passed through the sample drain line 51 and at the same time the filter sample (a) remaining in the sample reservoir 7 is the sample drain line ( After exiting through 55, the sample drain line 51 and the sample drain line 55 are collected in an overflow line 20 connected to each other and discharged to the recovery tank 200A.

The recovery tank 200A may be the same as the waste water purification tank 200.

On the other hand, S70 is a standby mode, and this state is maintained until the measuring period of S10 is reached. In general, the standby mode holding time is determined in consideration of the operating time of the wastewater treatment plant to which the flocculant is administered based on the phosphorus concentration.

On the other hand, Figure 5 shows an example of the configuration of the wastewater treatment facility to which the wastewater sample pretreatment system according to the present embodiment is applied.

As shown, the wastewater treatment plant comprises a wastewater sample pretreatment system 100 in which phosphorus concentrations are measured in real time without the removal of suspended solids from the wastewater containing suspended solids, and suspended solids. Wastewater septic tank 200 into which sewage water containing) is introduced and precipitated, MPCS (300, Monitering & Proportional Control System) provided with data detected and measured in wastewater to function as a top-level controller, Based on the measured phosphorus concentration measured in the measuring device 400, the secondary sedimentation basin 500 for repurifying the first purified wastewater through the wastewater purification tank 200, and the wastewater sample pretreatment system 100. A coagulant injector 600 for removing phosphorus by administering a coagulant and a sludge collector 700 for filtering sludge before being discharged from the secondary settler 500 from which phosphorus is removed.

The wastewater sample pretreatment system 100 is located between the sewage storage tank 200 and the secondary sedimentation basin 500, and the phosphorus concentration value measured by the wastewater sample pretreatment system 100 is transmitted to the MPCS 550.

The sewage storage tank 200 is a primary sedimentation basin (200-1) for precipitating and purifying the wastewater introduced with the suspended solids (Suspended Solids), and microorganisms are put into the wastewater purified by the sedimentation action to decompose sewage It consists of a biological reactor (200-2) causing.

The MPCS 550 obtains the coagulant dose rate primarily by using the phosphorus concentration provided from the wastewater sample pretreatment system 100, and further reflects the sewage inflow amount data, the water temperature data, and the PH data to determine the final coagulant dose. Can be.

The measuring device 400 is a flow meter 410 for measuring the flow rate of the waste water introduced with the suspended solids (Suspended Solids), and PH for measuring the pH concentration with the water temperature of the waste water collected in the primary settler (200-1) It consists of a measuring instrument 420.

The data measured by the flow meter 410 and the PH meter 420 is provided to the MPCS 300, which is used as data to accurately calculate the coagulant dose rate with the phosphorus concentration provided in the wastewater sample pretreatment system 100. do.

As described above, in the wastewater sample pretreatment system according to the present embodiment, when the sample pretreatment logic is executed, a plurality of valves 31, 53, 57 are provided together with the pump 11 constituting the piping system of the sample rack unit 60. By being controlled on or off according to the logic, wastewater is collected together with the suspended solids (Suspended Solids) in the wastewater purification tank 200 to the sampling raw water (A), and the suspended solids (Suspended Solids) from the sampling raw water (A). ) Filtered sample (a) is completely removed and the phosphorus concentration is measured, so that even if phosphorus concentration is measured from the wastewater containing suspended solids, the phosphorus of the waste water completely excluded the influence of suspended solids. The concentration can be accurately measured and the flocculant dose calculated using the exact phosphorus concentration so that the wastewater treatment plant can be operated based on the optimized flocculant dose.

1: container 3: sample reservoir
5: filtration membrane 7: sample reservoir
9: sample holding stage
10: sample extraction line 11: pump
13: return line 15: bypass line
17: auxiliary pump
20: overflow line 30: washing water line
31: washing water valve 33: washing water nozzle
40: sample sampling line
50: drain line 51: sample drain line
53: sample drain valve 55: sample drain line
57: Sample Drain Valve 60: Sample Rack Unit
70: phosphate measuring unit 80: control unit
100: wastewater sample preparation system
200: wastewater purification tank 200A: recovery tank
200-1: primary settler 200-2: biological reactor
300: MPCS (Monitering & Proportional Control System)
400: measuring instrument 410: flow meter
420: PH measuring instrument 500: secondary sedimentation basin
600: flocculant injector 700: sludge collector
A: Raw water a: Sample of filtered sample

Claims (17)

A sample reservoir in which sampling raw water containing suspended solids is collected from the waste water pumped in the wastewater purification tank; a filtration membrane filtering the suspended solids from the sampling raw water; A container comprising a sample reservoir in which a sample sample is collected;
A plurality of pipes for pumping the sampling raw water into the container, discharging the sampling raw water and the filtered sample sample from the container, and discharging the washing water including the suspended solids removed from the filtration membrane. A piping system provided with at least one electric machine on each of which is controlled on and off;
A phosphate measurement unit for measuring phosphorus concentration from the filtered sample sample;
Pumping the sampling raw water, measuring the phosphorus concentration in the filtered sample sample, and discharging the washing water including the sampling raw water, the filtered sample sample, and the suspended solids in stages. And a control unit incorporating sample preprocessing logic to control the electric machine on and off.
The piping system is connected to the waste water purification tank and the sample reservoir, the sample extraction line is installed on the control unit (On) Off (Off) is installed;
An overflow line connected to an overflow outlet of the sample reservoir and discharging the excessively introduced sampling raw water;
A washing water line connected to the sample reservoir to remove the suspended solids adhered to the filtration membrane, and having a washing water valve on and off controlled by the control unit;
A sample sampling line connected to the phosphate measuring unit from the sample reservoir to supply the filtered sample sample to the phosphate measuring unit;
A sample drain line connected to the sample reservoir and provided with a sample drain valve on and off controlled by the control unit;
A sample drain line connected to the sample reservoir and provided with a sample drain valve on and off controlled by the control unit;
Wastewater sample preparation system, characterized in that consisting of.
The wastewater sample preparation system of claim 1, wherein an overflow outlet configured to discharge the excess raw water introduced from the sample reservoir is further formed in the sample reservoir.
The wastewater sample preparation system of claim 1, wherein the filtration membrane is a membrane type.
The wastewater sample preparation system of claim 1, wherein a sample holding step is further formed at a position lower than the filtration membrane so that the filtered sample sample passing through the filtration membrane is accumulated.
delete The method of claim 1, wherein the sample extraction line is further provided with a return line from the rear end of the pump to the waste water purification tank, at the front of the pump with an auxiliary pump that is on (Off) controlled to the control unit Wastewater sample preparation system, characterized in that the bypass line is further connected to the rear end.
The system of claim 1, wherein the washing water line further includes a washing water nozzle configured to spray the washing water toward the filtration membrane. The wastewater sample preparation system of claim 7, wherein the wash water nozzle is rotated 360 degrees.
The wastewater sample preparation system of claim 1, wherein the sample drain line and the sample drain line are connected to the overflow line. delete delete delete delete delete delete delete delete

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