KR101552201B1 - Apparatus for Measuring High-Speed Sedimentation of Wastewater Sludge - Google Patents

Abstract

The present invention relates to an apparatus for measuring high-speed sedimentation of wastewater sludge, and a method therefor. The present invention may include: a measurement cylinder which has a piston inside, in which microorganisms or sludge delivered from the outside are stored through the upper part by vacuum pressure occurred by the piston moving from the top end part to the bottom end part; a pressure supplying means which provides the piston with pressure in order to move the piston within the measurement cylinder; multiple light sources which are installed separately at the same intervals on the outer wall of the measurement cylinder in order to radiate the light to the measurement cylinder; multiple light collecting units which are installed, facing the multiple light sources, individually, on the outer wall of the measurement cylinder in order to collect the light radiated from the multiple light sources; and sludge sedimentation detecting means which detects the sedimentation state of the sludge stored in the measurement cylinder at real time by using the intensity of the light collected by the multiple light collecting units.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus for measuring high-speed sedimentation of wastewater,

The present invention relates to a wastewater sludge fast sedimentation measuring apparatus, and more particularly, to a wastewater sludge fast sedimentation measuring apparatus for indirectly measuring the state of a flocculating sludge or a microorganism in aeration tank by predicting a solid-liquid separation process used for wastewater treatment.

With the development of the industry, the water quality of rivers is getting polluted every day. In particular, water pollution is more serious because of the sewage generated by human activities, which are rich in organic substances, suspended matter, nitrogen and phosphorus. It is becoming.

On the other hand, as the development of industrial technology and the improvement of living standards have increased the interest in environmental pollution, regulations on emission of various pollutants are becoming more strict. As a result, many efforts have been made to improve the quality of the polluted water, and the water quality of the river has been gradually improved due to the intensive investment during that time. Prior to this, it is necessary to positively prevent the contamination of river water, which is a drinking water source and a living water source, for efficient management of water resources. For this purpose, the treatment efficiency of sewage or wastewater treatment plant is very important, and the treatment process in the wastewater treatment plant is as follows.

The treated water flowing into the sewage or wastewater treatment plant is discharged after sequentially passing through the gypsum, the initial settling tank, the aeration tank, the final settling tank, and the disinfection facility.

In the tidal flat, materials with a relatively large specific gravity such as soil and sand introduced along with the water to be treated are settled, and materials such as plastics and bottles are filtered by the screen. In the first settling tank, Precipitation solids precipitate as they stay.

Also, in the aeration tank, aerobic microorganisms are cultured and coagulated with nutrients of organic substances in the treated water by sufficient air supplied from a blower or the like to form flocs, which is also called a bioreactor. In the final settling tank, Time. In this process, the activated sludge, which is liable to precipitate, is settled and a part is returned to the aeration tank, the excess sludge is sent to the concentration tank, and the clean supersonic water is discharged.

The most important step in the treatment of the water to be treated through the series of processes as described above is to set at least one to at most about 3 to 8 in accordance with the amount of the water to be treated so that floc by aerobic microorganism culture floc) is formed. (MLDO), Mixed Liquor Suspended Solid (MLSS), pH, SV30 (Sludge Volume), and Sludge Volume (MLDO) of the treated water in the aeration tank were continuously examined to see if the biological reaction was properly performed in each aeration tank. Water temperature, Sludge Volume Index (SVI), etc. should be periodically analyzed, recorded and managed.

Here, MLDO is the amount of oxygen dissolved in the treated water in the aeration tank, MLSS is the amount of suspended matters contained in the treated water in the aeration tank, and SV30 is the amount of activated sludge contained in the treated water when 1 liter of treated water in the aeration tank is left for 30 minutes. The volume percentage of sedimented activated sludge, SVI, is the volume index of sludge (SVI = SV30 / MLSS × 1000) that is occupied by 1 g of precipitated solids.

On the other hand, in order to analyze the treated water in the aeration tank, it is necessary to measure various measured values as described above. In the case of SV30, since the driver directly measures with the naked eye, not only the accuracy is low, but also manpower and time There is a lot of trouble. In addition, when the wastewater treatment facility has a large amount of inflow, or when the inflow amount of wastewater is excess (for example, summer), as well as the inflow amount decreases during the winter or drought, when the inflow is excessively large There was a problem that it was difficult to measure in real time.

In order to solve such a problem, a sedimentation rate analyzing apparatus such as Korean Patent No. 10-1131500 has been developed, however, it takes several minutes to several tens of minutes to analyze the sedimentation rate, a separate scrubbing apparatus is required, There is a problem that it is difficult to perform monitoring in real time because many parts are required in production because of complicated addition.

Korean Patent No. 10-1131500

Accordingly, it is an object of the present invention to provide a wastewater sludge fast sedimentation measuring apparatus capable of real-time monitoring of sedimentation of activated sludge in a wastewater treatment plant and reducing measurement error.

In order to achieve the above object, the apparatus for measuring high-speed sedimentation of wastewater sludge according to the present invention is characterized in that a piston is provided therein, and microorganisms or sludge transferred from the outside by the vacuum pressure generated when the piston is moved from the upper end portion to the lower end portion, A measuring cylinder which is internally stored; Pressure supply means for providing pressure to the piston such that the piston moves inside the measuring cylinder; A plurality of light sources spaced apart from each other at an outer wall of the measuring cylinder to irradiate the measuring cylinder with light; A plurality of light receiving portions provided on the outer wall of the measuring cylinder so as to face the plurality of light sources to collect light emitted from the plurality of light sources; And sludge sedimentation detecting means for detecting, in real time, the state in which the sludge stored in the measuring cylinder is settled using the intensity of the light received by the plurality of light receiving portions.

The present invention is characterized in that a rubber packing is provided on the outer wall of the piston so that the inside of the measuring cylinder is evacuated when the piston descends from the upper end to the lower end of the measuring cylinder.

In the present invention, the sludge stored in the measuring cylinder is discharged to the outside when the piston ascends from the lower end to the upper end of the measuring cylinder, and the inner wall of the measuring cylinder is cleaned by the rubber packing when the piston is always moved .

In the present invention, the pressure supply means may provide the piston with one of a hydraulic pressure and an air pressure.

In the present invention, the pressure supply means may include: an air cylinder provided at a lower portion of the measurement cylinder; An air piston installed inside the air cylinder and connected to a piston provided in the measuring cylinder, and having a rubber packing on its outer wall; And a compressor for providing air pressure to the air piston.

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According to the present invention, since the inner wall of the measuring cylinder is cleaned by providing the rubber packing on the outer wall of the piston provided inside the measuring cylinder, and the inside of the measuring cylinder is evacuated, the sludge from the sludge tank can be easily And detects the settling state of the sludge in the measuring cylinder by using the light received by the light receiving unit through the sludge stored in the measuring cylinder so that the settling property of the activated sludge can be monitored in real time as well as the settling property of the activated sludge Measurement error can be reduced.

FIG. 1 is a view showing an apparatus for measuring a rapid settlement of wastewater sludge according to an embodiment of the present invention.
Figure 2 is a partial enlarged view of the piston and measuring cylinder shown in Figure 1;
3 is a view showing an example in which a light source and a light receiving unit are installed on outer walls on both sides of the measuring cylinder shown in FIG.
FIG. 4 is a view showing an experimental example of the apparatus for measuring a rapid settlement of wastewater sludge shown in FIG. 1. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the detailed description of known functions and configurations incorporated herein will be omitted when it may unnecessarily obscure the subject matter of the present invention.

The same reference numerals are used for portions having similar functions and functions throughout the drawings.

In addition, when a part is referred to as being "connected" with another part throughout the specification, it includes not only a direct connection but also indirectly connecting the other parts with each other in between. Also, to "include" an element does not exclude other elements unless specifically stated otherwise, but may also include other elements.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown.

FIG. 1 is a view showing an apparatus for measuring a wastewater sludge fast settling apparatus according to an embodiment of the present invention, and FIG. 2 is a partial enlarged view of the piston and the measuring cylinder shown in FIG.

1 and 2, the apparatus for measuring high-speed sedimentation of wastewater sludge according to an embodiment of the present invention includes a piston 12 disposed therein, and a sludge (or a microorganism) or a bioreactor A pressure supply means for supplying pressure to the piston 12 so that the piston 12 moves inside the measuring cylinder 10; a pressure supply means for supplying pressure to the piston 12; A light source 30 installed at a predetermined distance from the outer wall of the measuring cylinder 10 for irradiating light to the measuring cylinder 10 and a light source 30 installed at an outer wall of the measuring cylinder 10 so as to face the light source 30, A light receiving section 40 for collecting the light irradiated from the light source 30 and a sludge sedimentation detecting means for detecting the settling state of the sludge stored in the measuring cylinder 10 by using the light received by the light receiving section 40 Including It is sex.

The measuring cylinder 10 is a place where microorganisms or sludge supplied from a sludge tank 18 (that is, sludge stored in a sludge or a bioreactor (or an aeration tank) before being introduced into a sedimentation tank) is stored, And the vacuum state is maintained by the piston 12 provided inside.

When the piston 12 provided inside the measuring cylinder 10 is reciprocated to the upper end of the measuring cylinder 10 in which the sludge is introduced and discharged (or discharged) from the bottom portion of the measuring cylinder 10, The inner wall is cleaned by the rubber packing 14 provided on the outer wall of the housing 12.

When the piston 12 is moved from the upper end of the measuring cylinder 10 to the lower end (i.e., the bottom portion) of the measuring cylinder 10, the rubber packing 14 blocks the contact with the outside air The inside of the measuring cylinder 10 is placed in a vacuum state.

When the inside of the measuring cylinder 10 is thus put in a vacuum state, the sludge stored in the sludge tank 18 (that is, the sludge stored in the sludge before being introduced into the sedimentation tank or the bioreactor) flows into the measuring cylinder 10 .

After the sedimentation speed of the sludge is measured, the sludge stored in the measuring cylinder 10 is discharged to the outside of the measuring cylinder 10 by the piston 12, and the sludge is discharged (or discharged) from the measuring cylinder 10, The inner wall of the measuring cylinder 10 is cleaned by the rubber packing 14.

The pressure supply means provides pressure to the piston 12 so that the piston 12 can be lifted from the lower end of the measuring cylinder 10 to the upper end of the measuring cylinder 10. The pressure supply means includes an air cylinder 22 provided at a lower portion of the measurement cylinder 10 as shown in Fig. 1 to provide air pressure to the piston 12, An air piston 24 provided to be connected to the piston 12 provided in the cylinder 10 and a compressor 26 for providing air pressure to the air piston 24. At this time, it is preferable that a rubber packing is installed on the outer wall of the air piston 24 so as to maintain a sealed state between the piston 12 and the air piston 24.

Accordingly, when the air pressure is supplied from the compressor 26 to the lower portion of the air piston 24, the piston 12 and the air piston 24 are pushed by the air pressure supplied from the compressor 26, 10 and the upper end of the air cylinder 22. At this time, the measurement cylinder 10 and the air cylinder 22 are maintained in a vacuum state by the rubber packing 14 provided on the outer surface of the piston 12 and the air piston 24, respectively.

On the other hand, the pressure supply means may provide the water pressure to the piston 12. [ At this time, the water pressure may be supplied from the sludge tank 18, or may be supplied from the sedimentation tank or the bioreactor. When the water pressure is supplied to the piston 12, the sludge tank 18, Sludge is supplied in the bioreactor.

The light source 30 is installed on the outer wall of the measuring cylinder 10 to irradiate light to the measuring cylinder 10. A plurality of the light sources 30 are installed on the outer wall of the measuring cylinder 10 at a predetermined interval and are driven by a power source supplied from the outside to irradiate the measurement cylinder 10 with light.

The light receiving unit 40 is installed on the outer wall of the measuring cylinder 10 so as to face the light source 30 and collects the light emitted from the light source 30. In other words, the light receiving unit 40 has the same number as the light source 30 on the outer wall of the measuring cylinder 10 in the direction opposite to the light source 30, and is irradiated from the light source 30, (10) and receives the transmitted light.

The sludge sedimentation detecting means detects the settling state of the sludge stored in the measuring cylinder 10 by using the light received by the light receiving portion 40.

Example

In the apparatus for measuring high-speed sedimentation of wastewater sludge according to the present invention, a white LED lamp having an output voltage of 2.5 V is used as a light source, and the light source 30 and the light receiving unit 40 are measured And 70 mm from the lower end of the cylinder 10 to the upper end thereof. Further, the measuring cylinder 10 was made of glass having a capacity of 1L.

In order to confirm the degree of irradiation and measurement of the light, a wastewater sludge fast precipitation measuring apparatus was installed as shown in FIG. 4, and then the measurement was carried out by the following six methods.

1. Direct reaction

0.3 V (DC) was measured in the light receiving portion 40 when light was irradiated from the white LED in the state where nothing was present between the light source 30 and the light receiving portion 40. When the light was not irradiated from the white LED, DC) was measured.

2. Air

A white LED and a light receiving unit 40 as a light source 30 at the height of 35 mm-5, 105 mm-4, 175 mm-3, 245 mm-2 and 315 mm- Table 1 shows the measured values according to the presence / absence of light irradiation and the height of the white LED.

Measuring height Measured value (V (DC)) Remarks blank 0.23 Value without illuminating the light ① 0.30 Light irradiation length: 70㎜ ② 0.31 Light irradiation length: 70㎜ ③ 0.30 Light irradiation length: 70㎜ ④ 0.30 Light irradiation length: 70㎜ ⑤ 0.30 Light irradiation length: 70㎜

As can be seen from the above Table 1, the value received by the light receiving portion 40 was not significantly related to the refractive index of glass, and was measured to be about 0.3 V (DC) similar to that of the direct irradiation, Which is not significantly correlated.

3. Water

A white LED and a light receiving unit 40 as a light source 30 at the height of 35 mm-5, 105 mm-4, 175 mm-3, 245 mm-2 and 315 mm- Table 2 shows the measured values of the white LEDs with and without light irradiation.

Measuring height Measured value (V (DC)) Remarks blank 0.25 Value without illuminating the light ① 0.31 Light irradiation length: 70㎜ ② 0.32 Light irradiation length: 70㎜ ③ 0.32 Light irradiation length: 70㎜ ④ 0.31 Light irradiation length: 70㎜ ⑤ 0.32 Light irradiation length: 70㎜

As can be seen from the above-mentioned Table 2, when there is water in the measuring cylinder 10, the measurement cylinder 10 has a tendency similar to the case where only air is present inside the measuring cylinder 10, but a value as high as about 0.01 V (DC) . ≪ / RTI > The reason why the light received by the light receiving unit 40 is higher when the water is in the measuring cylinder 10 is because the light irradiated from the LED lamp is refracted by the water inside the measuring cylinder 10 And is transmitted to the adjacent light receiving unit 40.

4. Sludge

A white LED and a light receiving unit 40 as a light source 30 at the height of 35 mm-5, 105 mm-4, 175 mm-3, 245 mm-2 and 315 mm- Table 3 shows the measured values according to the presence / absence of light irradiation and the height of the white LED.

Measuring height Measured value (V (DC)) Remarks blank 0.19 Value without illuminating the light ① 0.30 Light irradiation length: 70㎜ ② 0.30 Light irradiation length: 70㎜
After 5 minutes ③ 0.30 Light irradiation length: 70㎜ ④ -0.11 Light irradiation length: 70㎜ ⑤ -0.13 Light irradiation length: 70㎜

In the SV30 measurement of sludge, more than 230 mL did not sink in about 20 minutes and caused the color of the supernatant after sedimentation of sludge, but it did not affect the measurement of light irradiation. If the interface is not accurate, the measured value of the supernatant is low but within a certain range. The reason why the negative value of the consolidated sludge layer after the completion of the SV30 measurement is the mV value range It is preferable to measure the measured value as 0 V (DC).

5. Measurement of intensity of light source

When the light source voltage of the white LED is raised from 2.5V to 3V, it is measured by direct reaction, 0.4V (DC) in air and water, but not more than 0.3V (DC) in the sludge filtrate. Accordingly, it can be seen that the value measured by the light receiving section 40 does not change even if the light intensity is increased in the presence of the disturbance light.

As described above, the apparatus for measuring high-speed sedimentation of wastewater sludge according to the present invention is characterized in that the inner wall of the measuring cylinder 10 is cleaned by providing a rubber packing 14 on the outer wall of the piston 12 provided inside the measuring cylinder 10 In addition, since the inside of the measuring cylinder 10 is evacuated, the sludge from the sludge tank 18 is easily supplied to the inside of the measuring cylinder 10 without a separate pump and stored in the measuring cylinder 10 Since the sedimentation state of the sludge in the measuring cylinder 10 is detected by using the light received by the light receiving unit 40 through the sludge, not only the sedimentation property of the activated sludge can be monitored in real time, .

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit of the invention.

Accordingly, the scope of the present invention is not limited to the above-described embodiments, but may be implemented in various forms of embodiments within the scope of the appended claims. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

10: Measuring cylinder 12: Piston
14: Rubber packing 18: Sludge tank
22: air cylinder 24: air piston
26: compressor 30: light source
40:

Claims (7)

A measuring cylinder in which a piston is installed and in which microorganisms or sludge transferred from the outside are stored in the upper part through a vacuum by a vacuum pressure generated when the piston is moved from an upper end to a lower end;
Pressure supply means for providing pressure to the piston such that the piston moves inside the measuring cylinder;
A plurality of light sources spaced apart from each other at an outer wall of the measuring cylinder to irradiate the measuring cylinder with light;
A plurality of light receiving portions provided on the outer wall of the measuring cylinder so as to face the plurality of light sources to collect light emitted from the plurality of light sources; And
And sludge sedimentation detecting means for detecting in real time a state in which the sludge stored in the measuring cylinder is settled using the intensity of light received by the plurality of light receiving portions. The method according to claim 1,
Wherein a rubber packing is provided on an outer wall of the piston so that the inside of the measuring cylinder is evacuated when the piston descends from an upper end to a lower end of the measuring cylinder. The method of claim 2,
Wherein the sludge stored in the measuring cylinder is discharged to the outside when the piston ascends from the lower end to the upper end of the measuring cylinder and the inner wall of the measuring cylinder is cleaned by the rubber packing when the piston is always moving. Deposition measuring device. The method according to claim 1,
Wherein the pressure supply means supplies pressure to the piston, one of water pressure and air pressure. The method according to claim 1,
Wherein the pressure supply means includes:
An air cylinder provided at a lower portion of the measuring cylinder;
An air piston installed inside the air cylinder and connected to a piston provided in the measuring cylinder, and having a rubber packing on its outer wall; And
And a compressor for providing air pressure to the air piston. delete delete

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