KR20090090188A - Bio-reactor auto-sensing system - Google Patents

Abstract

An auto-measuring system of water quality in a bio-reactor is provided to transfer data by on-line and monitor the status of the bio-reactor at the same time. An auto-measuring system of water quality in a bio-reactor comprises: a water quality analyzing part (10) which is installed near the bio-reactor (T); a SV analyzing part (20) which is installed near a water quality measuring bath (11); a sampling part (30) which collects sample of the bio-reactor and provides to water quality analyzing part and SV analyzing part; a washing part (40) for discharging discharged water to the bio-reactor; and a computation control part (50) which controls washing and discharging.

Description

Bio-reactor auto-sensing system

The present invention relates to a device for automatically measuring the water quality in order to check the operating state of the bioreactor in the sewage treatment process, and more particularly, to stably sample the sample of the bioreactor containing a large amount of solids to improve the water quality of the bioreactor. The present invention relates to a biological reactor automatic water quality measurement equipment that can be continuously and efficiently monitored.

As the interest in environmental pollution increases with the development of industrial technology and the improvement of living standards, the regulations on the emission of various pollutants are getting stricter. Especially, Korea is classified as a water-deficient country in the future. Sufficient care and management are very important.

In the case of water, the pollution can be classified into two aspects: one is wastewater and sewage generated at each industrial site, and the other is living sewage discharged from home, etc. Wastewater and sewage are purified and discharged at each factory, and domestic and local sewage treatment facilities are installed and managed by national or local governments.

As mentioned above, Korea, which is a water-deficient country in the future, must actively prevent pollution of river water, which is a source of drinking water and living water, for the efficient management of water resources. Therefore, the treatment efficiency of sewage and wastewater treatment plants is very important. The treatment process in sewage, sewage and wastewater treatment plants is as follows.

Prior to the description, for the sake of convenience, the sewage or wastewater flowing into the treatment plant is referred to as "treatment water", and the sewage or wastewater in the treatment process after entering the treatment plant is referred to as "treatment water". .

The treated water flowing into the sewage or sewage treatment plant is discharged after passing through the sedimentation site → initial sedimentation site → aeration tank → final sedimentation site → sterilization equipment. Materials with a relatively high specific gravity, such as soil and sand, are precipitated, and materials such as plastic and bottles are filtered out by the screen. In the first sedimentation basin, sedimentary solids are precipitated as the treated water flows from the sedimentation basin for several hours. .

In the aeration tank, aerobic microorganisms are cultured and aggregated using organic substances in the treated water as nutrients with sufficient air supplied from a blower or the like to form flocs, also referred to as bioreactors (hereinafter referred to as "bioreactors").

In the final sedimentation basin, the treated water transferred from the bioreactor stays for several hours. In this process, the activated sludge which is susceptible to sedimentation is precipitated and part is returned to the bioreactor, and the surplus sludge is sent to the concentration tank, The supernatant is discharged.

The most important step in the treatment of the water to be treated through the continuous series as described above, according to the amount of the water to be treated is at least 1 to most cases 3 to 8 trillion installed floc by aerobic microbial culture In this process, the sewage treatment using the bioreactor is called activated sludge process, and when the sewage is treated by the activated sludge process, in order to obtain the best purification efficiency in the bioreactor, The amount should be adjusted properly.

However, the rate of purification by activated sludge is not always constant, but BOD (Biochemical Oxygen Demand), MLDO (Mixed Liquor Dissolved Oxygen, dissolved oxygen concentration in mixed solution), MLSS (Mixed Liquor Suspended Solid) , pH (commercial logarithm of the reciprocal of hydrogen ion concentration), SV30 (sludge volume 30, the ratio of settling sludge to sample volume when the sample is left in a 1 liter measuring cylinder for 30 minutes), and water temperature In order to continue to check whether the treatment of treatment water by biological reaction is properly performed in each bioreactor, the above factors for the treatment water being treated in the bioreactor are periodically analyzed, recorded and It must be managed.

Therefore, in order to efficiently manage the factors affecting the purification rate of activated sludge, most domestic sewage treatment plants have installed water quality measurement system in the bioreactor to check the water quality change.

However, in the case of the above-mentioned method, since the raw water quality change does not occur due to the transfer of the sample, the data closest to the actual value can be obtained, but each sensor must be installed in the field. Not only does it cost a lot of initial investment, but it also has a drawback that it is impossible to obtain accurate data due to sensor contamination by solid materials and contaminants.

In addition, it takes a lot of manpower and time to clean and calibrate the sensor in order to obtain accurate data, so the site is left with expensive equipment installed.

For this reason, there are many cases where objective and continuous plant operating condition data cannot be secured because some companies do not trust the measured values of the instrument and the manager analyzes the water quality manually and uses it as the plant operation data as needed.

In order to solve the problem of installing the measuring instrument directly in the field as described above, a system has been attempted to transfer and analyze the sample intermittently through the installation of the sampling pipe in the bioreactor, but the characteristics of the sample change due to the long transfer distance. In addition, there is a problem such as blockage of the inlet pipe, freezing of winter, etc., so that there is a lot of difficulties in the continuous water quality analysis is not a sure alternative.

In addition, the water quality measurement system installed in most sewage treatment plants in Korea is difficult to continuously measure due to the solid matter contained in the sewage, and requires much cost and manpower for maintenance.

The present invention was devised to solve all the problems of the conventional method for monitoring a bioreactor in a sewage treatment plant, and utilizes the advantages of a method of directly installing various measuring instruments in the field and the advantages of a sampling method to provide stable and continuous water quality analysis. It is an object of the present invention to provide such a bioreactor automatic water quality measurement equipment.

In addition, by installing the instrument close to the site and avoiding the denaturation of the sample through continuous sampling, it is possible to manage the technology and process factors in advance to improve the reliability of the measurement value caused by the contamination of the sensor. It is another object of the present invention to provide a more active automatic water quality measurement equipment that can be discharged in advance to prevent the optimal discharge water.

The above object of the present invention, the proximity automatic sampling and the periodic automatic cleaning for the sensor and the like that can solve the problem of contamination of the sensor and the problem of the change in the properties of the sample caused by the distance of the transport of the sample, which hinders the reliability of the sensor Is achieved.

The bioreactor automatic water quality measurement device of the present invention can measure MLSS, MLDO, SV30, pH, water temperature, etc. at once, and automatically calculate the values of SVI, etc. Because data is transmitted online while analyzing and storing, it has the advantage of being able to be monitored simultaneously in the laboratory, monitoring station, and other remote locations.

In addition, since the automatic cleaning is possible, the maintenance time is minimized, the maintenance is convenient, the equipment installation space is small, and the measurement conditions can be kept constant through the use of the instrument, thereby ensuring the objectivity of data.

1 is an installation diagram of an embodiment of the present invention equipment.

Figure 2 is a block diagram of an embodiment of the present invention equipment.

Figure 3 shows an embodiment of the present invention constituting the sample collection tube and the contaminants intake prevention net and brush,

  (A) is the degree of binding at the time of sampling the treated water,

  (B) is the degree of coupling when cleaning the infiltration net.

                  ((Explanation of symbols for main part of drawing))

      10. Water Quality Analysis Unit 11. Water Quality Measuring Tank 12. Water Quality Sensor

      20. SV analyzer 21. SV measuring tank 22. Light source

      23. Photometric sensor 30. Sampling unit 31. Sample collection tube

      32. Treated water pump 33. Anti-fog inhalation net 34. Brush

      40. Washing section 41. Washing water pump 42 Exhaust pipe

      50. Operation control part S. Stirrer N. Washing water nozzle

      H. Sampler T. Bioreactor

The present invention relates to a device for automatically measuring the water quality of a bioreactor in order to continuously check whether the biological reaction in the bioreactor is properly performed.

The equipment of the present invention is installed adjacent to the bioreactor to measure the water quality while minimizing the change in the properties caused by the movement of the treated water collected in the bioreactor, and to transmit it online, while simultaneously collecting the treated water. There is a technical feature in the structure to automatically clean the sampling device and the various water quality measuring devices for measuring the water quality.

Biological reactor automatic water quality measurement equipment of the present invention, the sampling unit for collecting the treated water sample of the bioreactor with a lot of solid matter; A water quality analysis unit and an SV analysis unit for measuring a water quality state from the collected sample; A washing unit for periodically and automatically cleaning the water quality analyzing unit, the SV analyzing unit, and the sampling unit; An operation control unit for recording, storing, and transmitting the measured value of the analysis unit to the outside, and controlling the operation of the sampling unit, the analysis unit, and the cleaning unit; It consists of, etc. Looking at each as follows.

The sampling unit serves to collect a sample from the treated water being processed in the bioreactor, and the sample collection pipe is immersed in the bioreactor; Anti-fogging inhalation network surrounding the sampling tube; The treatment water in the bioreactor is sucked through the sampling hole in the state in which unnecessary contaminants are filtered through the inhalation trap network and then supplied to the water quality analysis unit and the SV analysis unit which will be described below.

The water quality analysis unit, which measures water quality factors that can be immediately measured from the sample of treated water collected by the sampling unit, that is, MLDO, MLSS, pH, water temperature, etc., includes: a water quality measurement tank; Many kinds of water quality measurement sensors such as MLDO, MLSS, pH and water temperature sensors; Consists of, the water quality measuring tank is provided with a washing water spraying means for spraying the washing water to each measuring sensor.

SV analysis unit for measuring the SV30 that should be measured after a certain amount of time to the collected sample, the SV measuring tank that serves as a measuring cylinder; A linear light source installed at one side of the SV measuring tank along a height direction of the SV measuring tank; A photometric sensor installed at the other outside of the SV measuring tank and capable of reciprocating along the height direction of the SV measuring tank, the light measuring sensor sensing the light intensity of the light source passing through the SV measuring tank; And the like.

That is, the treated water sample collected from the sampling unit is supplied to the water quality measuring tank and the SV measuring tank, and MLDO, MLSS, pH, water temperature, etc. are measured from the sample supplied to the water measuring tank, and from the sample supplied to the SV measuring tank, After 30 minutes the SV30 is measured.

At this time, when the SV30 is measured, the sludge sinks 30 minutes after the sample is supplied. The light from the light source installed on one side of the outside of the SV measuring tank may pass through the upper part of the SV measuring tank where the sludge has subsided. When the sludge sinks and accumulates, the lower part of the SV measuring tank cannot pass or only a small amount can pass.The photometric sensor installed on the other side of the SV measuring tank passes through the SV measuring tank. After moving downward while sensing, the luminosity stops at a sharply decreasing part, and the SV30 is calculated by calculating the moving distance of the photometric sensor.

The washing unit is for cleaning the sampling tube, the sampling inlet of the contaminant, the various sensors, the SV measuring tank, and the sample supply pipe. It receives the measured value, stores, records and transmits it, and controls the sampling unit, the cleaning unit and the analysis unit.

In the equipment of the present invention configured as described above, the sampling unit, water quality analysis unit, SV analysis unit, washing unit and operation control unit are connected to each other by a pipe or a wire, the motor which can be automatically controlled to automate each operation , Pumps, valves, etc. are provided in the pipe, which is a basic element that must be provided in the automation equipment as a description thereof has been omitted.

Details of the effects and the resulting effects, including the object and technical configuration of the present invention will be clearly understood by the following description with reference to the drawings showing a preferred embodiment of the present invention.

1 is a diagram illustrating the installation of the present invention equipment, and FIG. 2 is a block diagram of the present invention equipment.

As shown in the biological reactor automatic water quality measurement equipment of the present invention,

A plurality of water quality measurement sensors 12 provided in the water quality measurement tank 11 so as to be immersed in the water quality measurement tank 11 installed in the biological reaction tank (T) adjacent place and the treated water sample filled in the water quality measurement tank 11. Water quality analysis section 10 consisting of;

SV measuring tank 21 provided adjacent to the water quality measuring tank 11, linear light source 22 provided in the height direction of the SV measuring tank 21 on one side of the SV measuring tank 21, and SV measurement An SV analyzer 20 formed of a photometric sensor 23 installed on the other outer side of the tank 21 so as to reciprocate along the height direction of the SV measuring tank 21;

A sample of the treated water is collected through the sample collection tube 31 and the sample collection tube 31 which is immersed in the treated water of the bioreactor T and supplied to the water quality measuring tank 11 and the SV measuring tank 21. A sampling unit 30 comprising a treated water pump 32 and a contaminant suction prevention network 33 surrounding the sample collection pipe 31;

Washing water pump 41 for supplying and spraying the washing water to the water quality measuring tank 11 and the SV measuring tank 21, the treated water sample and the washing water discharged from the water quality measuring tank 11 and the SV measuring tank 21 A washing unit 40 including a discharge pipe 42 connected to the bioreactor T from the water quality measurement tank 11 and the SV measurement tank 21 to discharge all the discharged water to the bioreactor T;

It is electrically connected to the water quality analysis unit 10, the SV analysis unit 20, the sampling unit 30 and the washing unit 40 receives various measured values analyzed from the treated water sample, and stores, records and sends them to the outside. A transmission control unit 50 which transmits and controls the collection and washing and discharge of the treated water; And the like.

At this time, the plurality of water quality measurement sensors 12, MLDO measurement sensor, MLSS measurement sensor, pH measurement sensor and water temperature sensor, etc., the number of the water quality measurement sensor 12 according to the water quality items to be measured can be added or subtracted.

In the case of the SV30 measurement, the moving distance of the photometric sensor 23 is input to the calculation controller 50, and the calculation controller 50 calculates the SV30 based on this.

It is also preferable to combine the water quality analysis unit 10, the SV analysis unit 20, and the operation control unit 50 inside the housing (or case) 100 on the housing, and then install the housing 100 near the bioreactor T. Do.

In this case, the sampling unit 30 installed in the bioreactor T is piped to the housing 100, and the washing unit 40 connected to the external washing water supply source is the housing 100 and the bioreactor T. Is connected to the pipe.

In addition, the treatment water pump 32 and the washing water pump 41 may be built in the housing 100 or may be installed outside the housing 100.

In the biological water reactor automatic water quality measurement apparatus of the present invention configured as described above, the treated water sample of the bioreactor T continuously or periodically by the command of the operation control unit 50, the water quality analyzer 10 and the SV analyzer. After supplying to (20) to measure the various water quality values, the treated water sample is discharged to the bioreactor (T).

Therefore, in order to accurately measure the condition of the treated water every time, the treated water sample supply pipe, the water quality measuring tank 11, the water quality measuring sensor 12, and the SV measuring tank 21 should be periodically cleaned. As can be carried out by the method, the washing water may be injected into the sample supply pipe for washing or backwashing.

In particular, the water quality measurement sensor 12 installed in the water quality measurement tank 11 should be washed cleanly. The water quality measurement tank 11 includes a washing water nozzle N capable of directly spraying the washing water onto the water quality measurement sensor 12. It is preferable to provide the inside, and in order to wash the inside of the water quality measuring tank 11, you may install the stirrer S by which the operation control part 50 is controlled by the operation control part 50 inside the water quality measuring tank 11.

That is, when the water quality analysis is completed, the treated water sample is discharged, and then the stirrer (S) is operated in the state of filling the wash water in the water quality measurement tank 11 so that the residual treated water and solids are mixed with the wash water and discharged. By spraying the washing water to the water quality measuring sensor 12 using (N), the water quality measuring tank 11 and the water quality measuring sensor 12 can be washed, and the SV measuring tank 21 is the SV measuring tank 21. It can be cleaned inside by spraying the washing water strongly from the top to the bottom.

The pipe connected to the discharge pipe 42 from the upper portion of the SV measuring tank 21 is an overflow pipe.

At this time, the piping for supplying the treated water sample and the piping for supplying the washing water may be separately configured, but the treatment water pump 32 and the washing water pump 41 are installed adjacent to each other, and near the connection end of the pipe connected to each pump. It is also desirable to combine the two pipes from the pump to each pump so that the supply of wash water and sample consists of a single pipe from the vicinity of the pump.

In addition, the automatic valve (V) is coupled to the pipes connected to the discharge pipes 42 at the lower portions of the water quality measuring tank 11 and the SV measuring tank 21, respectively, and controls the opening and closing operation of the automatic valve V. By controlling in step 50), the treated water sample and the wash water, that is, the discharged water can be automatically discharged into the bioreactor T. Of course, the treatment water pump 32 and the washing water pump 41 are also controlled by the control operation unit 50.

In the case of the sampling tube 31 constituting the sampling unit 30, the sampling hole H of appropriate size may be provided to prevent various contaminants contained in the treated water from flowing into the sampling tube 31. , The sampling hole (H) of the sampling tube (31) may be easily blocked, so that the sample collection tube (31) is enclosed with a contaminant inhalation prevention network (32) having a larger content than the sampling tube (31). desirable.

And it can wash the sample collection pipe 31 and the contaminant inhalation prevention net 32 by the method of backwashing to the sample collection pipe 31 as the washing water dope 41, and the various kinds attached to the outer surface of the contaminant intake prevention network (32) In order to remove the contaminants more effectively, as shown in FIG. 3, the cylindrical brush 34 is fixedly provided, and the sampling tube 31 and the contaminant inhalation prevention net 33 are reciprocated together at the inner diameter of the brush 34. It can also be moved to remove solids such as impurities.

Claims (5)

A water quality analysis unit 10 including a water quality measurement tank 11 disposed adjacent to the biological reaction tank T, and a water quality measurement sensor 12 coupled to be immersed in a sample filled in the water quality measurement tank 11; SV reciprocating tank 21 installed adjacent to the water quality measuring tank 11, a light source 22 provided on one side of the outside of the SV measuring tank 21, and installed on the other outside of the SV measuring tank 21, vertical reciprocating movement SV analysis unit 20 made of a photometric sensor 23 possible; Treatment water for supplying the sample collection pipe 31 immersed in the treated water of the biological reaction tank (T) and the treated water sample sucked into the sample collection pipe 31 to the water quality measurement tank 11 and the SV measurement tank 21 A sampling unit 30 composed of a pump 32; Discharging the water discharged from the wash water pump 41 and the water quality measurement tank 11 and the SV measurement tank 21 to supply the wash water to the water quality measurement tank 11 and the SV measurement tank 21 to the biological reaction tank (T). Washing unit 40 consisting of a discharge pipe 42 for; It is electrically connected to the analysis unit 10, 20, the sampling unit 30 and the washing unit 40 receives the measured values and signals obtained from the sample, and calculates, stores, records and transmits them to the outside. Operation control unit 50 for controlling the washing and discharge; Bioreactor automatic water quality measurement equipment, characterized in that configured to include. According to claim 1, wherein the water quality analysis unit 10, SV analysis unit 20 and operation control unit 50 is a biological reactor automatic water quality measurement equipment, characterized in that coupled to the interior of the housing 100. The biological water tank automatic water quality measurement equipment according to claim 1, wherein an agitator (S) controlled by the operational control unit (50) is additionally installed in the water quality measurement tank (11). The biological water tank automatic water quality measurement equipment according to claim 1, characterized in that the water quality measuring tank (11) has a washing water nozzle (N) for spraying the washing water to the water quality measuring sensor (12). According to claim 1, wherein the sample collection pipe (31), biological reaction tank automatic water quality measurement equipment, characterized in that wrapped in the trap of the inhalation trap (32).