KR20050097190A - Plant for efficiency effluent of dissolved matter from the wastewater separated into solids and dissolved matter - Google Patents

Abstract

Disclosed is a supernatant separator for wastewater. The supernatant separation device of such waste water is installed in the sedimentation tank in which the waste water is stored, and floated inside the sedimentation tank, and when the internal air is discharged, the waste water of the sedimentation tank is introduced into the water to form a water surface and the water surface. A reaction tank for discharging the supernatant water separated from the waste water by the surface tension generated in the liver to the outside of the sedimentation tank, and when the air is introduced therein, filling the air to pressurize the water to prevent the outflow of the supernatant, and the sedimentation tank. It floats on the surface of the connection to the reactor comprises a float that allows the reactor to maintain a certain position.

Description

Plant for efficiency effluent of dissolved matter from the wastewater separated into solids and dissolved matter}

The present invention relates to an apparatus for separating wastewater from supernatant, and more particularly, in the case of sedimentation of wastewater, the surface in contact with air in a material containing sediment uses a phenomenon in which material separation occurs easily due to instantaneous surface tension. The present invention relates to a supernatant separation device for wastewater that can selectively separate a liquid portion that is momentarily separated from the surface of the water.

In general, the water treatment process is a process of changing the contaminated material in the water to a material stabilized by microorganisms or chemical oxidation and reduction.

Therefore, the water treatment technology is a technique for stabilizing the characteristics of the wastewater, organic matter and nutrients in various ways, and at present, the water treatment technology is mostly biological treatment method, and relatively low treatment cost.

However, it is difficult to separate the supernatant and sediment at the beginning or after treatment of the water treatment process, resulting in a complicated treatment process or a deterioration of treated water quality.

Therefore, the core of the wastewater treatment is how to effectively separate the separated solids and the supernatant from the wastewater by gravity or mechanical precipitation.

So far, various methods have been disclosed to solve this problem. That is, a method of forcibly transferring the supernatant water by a pump, a method of separating the supernatant water by a floating mechanism, and a forced discharge method based on the cyphon principle have been disclosed. Recently, a method of mechanically moving up and down by hydraulic pressure has been developed.

However, in the case of forcibly transferring the supernatant by means of a pump, the precipitated sludge is simultaneously transferred or the scum of the water is simultaneously discharged to increase the concentration of the discharged water.

In addition, in the case of the method of separating the supernatant by the flotation mechanism, since the sludge injected in the aeration process is discharged simultaneously in the discharge pipe, a large amount of sludge is included in the initial discharge water.

In addition, in the case of the forced discharge method based on the cyphon principle, since it is discharged at a fixed point, it should be operated in various ways according to the inflow amount or the state of microorganisms, and it is difficult to control the discharge amount in response thereto.

In the case of mechanically moving up and down by hydraulic system, the processing efficiency is high, but expensive manufacturing cost and excessive power cost during operation are problematic and it is operated by various automatic mechanisms, so it is difficult to repair itself in case of malfunction. Therefore, it is impossible to install in a small waste water treatment plant.

Therefore, as mentioned above, the conventional technique is very low or expensive and must be composed of a device of a large structure to induce a proper effect, so that it is difficult to apply it to a general purpose or a small wastewater treatment plant. have.

Accordingly, it is an object of the present invention to provide a supernatant separation device that can effectively and stably separate dissolved substances and solids from waste water by using surface tension of water in contact with air.

In order to achieve the above object, the present invention and the sedimentation tank in which waste water is stored; The supernatant water separated from the waste water by the surface tension generated between the air and the water by the surface water generated between the air and the surface of the sedimentation tank is installed so as to be floated, and the internal air is discharged, the waste water of the sedimentation tank is introduced into the water surface. A reaction tank which discharges to the outside of the settling tank and prevents the outflow of the supernatant water by pressurizing the surface of the air when the air is introduced therein; And it floats on the surface of the settling tank provides a supernatant water separation apparatus of waste water comprising a buoy to be connected to the reaction tank to maintain a constant position.

Hereinafter, with reference to the accompanying drawings will be described in detail the wastewater treatment apparatus according to the present invention.

1 is a side sectional view showing a wastewater treatment apparatus in a preferred embodiment of the present invention. As shown, the wastewater supernatant discharge device is an inlet, aeration, agitation, sedimentation, discharge is made in a single reactor, is a device for effectively discharging the supernatant after precipitation.

The wastewater supernatant discharge device is a sedimentation tank (1) in which wastewater is stored, and can be floated inside the sedimentation tank (1), and the wastewater by surface tension generated between the air and the water by lifting and lowering by injecting / exhaust air. Separation of the supernatant water from the reaction tank (3) for discharging to the outside of the settling tank (1), floating on the water surface and connected to the reaction tank (3) to the mouth (22) to maintain the constant position of the reaction tank (3) Is done.

As shown in FIGS. 2 to 4, the reaction vessel 3 is attached to the case 5 in which the inside thereof is divided into upper and lower spaces by the plate 7 and downward from the plate 7. A plurality of water moving pipes 13 into which the supernatant separated by surface tension is introduced, an air inlet pipe 15 attached to a lower side of the plate 7 of the case 5, and into which external air is injected, and the case Attached to the upper surface of the (5) and the air discharge pipe 21 for discharging the air inside the case (5), and the effluent pipe for communicating with the upper space of the case (5) to discharge the water of the uppermost water to the outside of the settling tank (19) )

Therefore, when the air in the reaction tank (3) is discharged through the air discharge pipe 21, the air in the air holding space (9) inside the reaction tank 3 is discharged, the lower line 12 of the reaction tank (3); The water surface formed in FIG. 1 gradually rises to form the water surface at the bottom line 25 of the water pipe 13 (FIG. 5), wherein the waste water rising to the area of the water pipe 13 among the raised waste water is the water pipe 13. It is moved to the upper space 11 through the storage.

And, because the surface tension is generated in the water surface except the area occupied by the water pipe 13 of the water surface formed on the bottom line 25 (Fig. 5), only the supernatant is introduced into the water pipe 13, the water pipe 13 Moving upward through the discharge water is discharged to the outside through the pipe (19).

On the contrary, when external air is supplied to the inside of the reaction tank 3 through the air inlet pipe 15, the introduced air occupies the top of the inside of the reaction tank 3 and pushes the water inside to the bottom to discharge the continuous water. To block.

The reaction vessel 3 will be described in more detail. The case 5 has an empty hexahedron shape, and is partitioned by a plate 7 to form an upper space 11 where upper water is collected, and a lower portion thereof. By opening, the air holding space 9 is formed.

Then, the lower part of the case 5 is opened as described above, so that the waste water stored in the sedimentation tank 1 is introduced into the case 5, and the supernatant of the introduced waste water is separated by surface tension, thereby allowing a plurality of water moving tubes. It may flow into the upper space 11 through the (13).

In addition, the air inlet pipe 15 is connected to one side of the reaction tank 3, preferably between the lower line of the plate 7 and the lower line 25 of the water pipe (13).

The air inlet pipe 15 is connected to an external blower (not shown), and an air control valve (not shown) is mounted at one side.

By opening and closing the air control valve (not shown), air is injected into the air holding space 9 of the reactor 3 through the air inlet pipe 15.

Therefore, when external air flows into the air holding space 9 through the air inlet pipe 15, the pressure inside the reaction tank 3 increases above atmospheric pressure, so that the air is the wastewater inside the reaction tank 3. Will be pushed downward. As a result, the wastewater pushed downward moves to the settling tank 1.

Of course, when the outside air is excessively injected into the reaction tank (3), the air flows out into the waste water through the lower portion of the open shape of the case. At this time, the control valve 23 of the air discharge pipe 21 is in a closed state.

As a result, by opening the air inlet pipe 15 and closing the air discharge pipe 21, waste water can be introduced into or discharged into the air holding space 9 of the reactor 3.

On the other hand, the outflow water pipe 19 discharges the supernatant water stored in the upper space 11 of the reaction tank 3 to the outside of the settling tank (1).

That is, one side of the effluent pipe 19 is in communication with the tubular body 17 protruding round the upper surface of the reaction tank 3, the other side penetrates through the settling tank 1 and protrudes to the outside.

Therefore, only the supernatant water is stored in the upper space 11 of the reaction tank 3 by the surface tension and discharged to the outside of the settling tank 1 through the effluent pipe 19 to be purified.

At this time, the effluent pipe 19 is preferably formed of a flexible material. That is, according to the external water level difference, the reaction tank 3 is floated or settled in a natural flow type, so that the material of the pipe is preferably formed of a flexible material in order to respond appropriately.

Again, referring to FIG. 1, the float 22 includes a material having a predetermined buoyancy force, preferably an air tube, to efficiently float on the surface of the waste water. Moron, styrofoam and the like may also be used.

In addition, two of the sub-balls 22 constitute a pair, and the two sub-balls 22 are integrally connected to the case 5 by a wire or the like.

Therefore, the reaction tank 3 can maintain a predetermined height without falling by the pair of floats 22 in the waste water.

Hereinafter, with reference to the accompanying drawings will be described in more detail the operation of the supernatant discharge device according to a preferred embodiment of the present invention.

1 to 5, first, wastewater is stored in the sedimentation tank 1, and the wastewater is separated into layers by inflow, aeration, agitation, and sedimentation, so as to dissolve dissolved substances (supernatant), sludge, scum, and the like. It will separate into solid form. Then, the dissolved substance except for the solid substance is discharged to the outside.

At this time, the supernatant may be separated by surface tension during the wastewater treatment process and discharged through the effluent pipe 19.

In more detail, initially, the internal air is discharged through the air discharge port 21, and the reaction tank 3 is settled to the settling tank 1 to a predetermined depth in a state in which it is connected to the float 22. At this time, the waste water inside the settling tank 1 is introduced through the lower portion of the reaction tank 3, the water surface is formed on the bottom line 25 (Fig. 5) of the water pipe (13). That is, the inside of the upper space of the lower line 25 (FIG. 5) formed by the plurality of water pipes 13 is filled with air.

Therefore, surface tension is generated in the water surface forming the bottom line 25 (FIG. 5), and only the upper water located at the top of the water surface 25 (FIG. 5) is selected to form an upper space through the water pipe (13). 11, and finally discharged to the outside of the settling tank 1 through the effluent pipe 19.

In addition, in the case of stopping the discharge process, the air is injected into the air holding space 9 by injecting external air through the air inlet pipe 15.

When the air injection process is continued and the internal pressure of the reactor 3 increases above atmospheric pressure, the air pushes the waste water inside the reactor 3 downward.

Therefore, the pushed waste water forms a water surface on the bottom line 12 (Fig. 1) of the reaction tank 3. As a result, discharge of the supernatant water may be stopped by filling the air holding space 9 with air. Of course, when the outside air is excessively injected into the reactor 3, the air flows out into the waste water through the lower portion of the open shape of the case (5).

As described above, the process of discharging the supernatant is performed by repeatedly performing the above two processes.

As described above, the apparatus for discharging supernatant of wastewater according to the present invention has the following advantages.

First, in the wastewater containing sediment, the water contacting the air is easily generated material separation by the instantaneous surface tension, there is an advantage that can be separated from the liquid phase instantaneously by using this phenomenon.

Secondly, when not effluent is discharged, the sludge discharge can be excluded from the initial effluent by raising the outlet to the waste water surface.

Third, since it is composed of a simple structure, the production is simple and the cost is very low, so it can be easily applied to a small treatment plant.

The present invention can be variously changed by those skilled in the art without departing from the gist of the present invention claimed in the claims, and is not limited to the specific preferred embodiments described above. .

1 is a side cross-sectional view showing an apparatus for separating supernatant of wastewater according to a preferred embodiment of the present invention.

FIG. 2 is a perspective view showing a supernatant separation device for wastewater shown in FIG. 1; FIG.

3 is a bottom perspective view of the supernatant water separating apparatus of wastewater shown in FIG. 2;

4 is a plan view of the supernatant separation device of wastewater shown in FIG.

5 is an operating state diagram showing a state in which the supernatant water is discharged in the supernatant water separating apparatus of wastewater shown in FIG.

Claims (5)

A sedimentation tank for storing waste water; The supernatant water separated from the waste water by the surface tension generated between the air and the surface of the sedimentation tank is installed so as to be floated, and when the internal air is discharged, the waste water of the sedimentation tank is introduced into the water to form the water surface. A reaction tank which discharges to the outside of the settling tank and prevents the outflow of the supernatant water by pressurizing the surface of the air when the air is introduced therein; And The supernatant water separation device of the waste water comprising a float to rise on the water surface of the sedimentation tank to be connected to the reaction tank to maintain the constant position. According to claim 1, The reaction tank is divided into the upper and lower spaces by the inside of the case and the waste water of the sedimentation tank flows into the lower portion, and protrudes downward from the plate, the water surface is formed on the bottom line The upper part of the wastewater is separated into the wastewater by the surface tension and is introduced into the inside. The space formed at the upper part of the water is attached to a plurality of air moving tubes filled with air and the lower part where the plate on the side of the case is located to inject external air. The upper water of the waste water including an air inlet pipe which is attached to the upper surface of the case, the air discharge pipe for discharging the air inside the case, and the effluent pipe connected to the upper space of the case to discharge the water of the uppermost surface to the outside of the settling tank Separator. According to claim 2, wherein the case has a hexahedral shape, the inner space is partitioned up and down by the plate is formed in the upper space of the upper water is stored in the upper portion, the upper portion of the waste water of the waste water is formed in the air holding space . The waste water pipe of claim 2 or 3, wherein one side of the effluent pipe communicates with an upper space of the case, and the other side protrudes out of the settling tank so that the uppermost water of the uppermost surface can be separated and discharged to the outside of the settling tank. Super water separator. According to claim 2, When the outside air is supplied to the inside of the reaction tank through the air inlet pipe is taken in from the upper end of the inside of the reaction tank to push the water inside to the lower end to block the continuous discharge of water, In the case of discharging the internal air through the air discharge pipe, the water is introduced into the portion occupied by the air instead, and the water surface is formed on the bottom line of the water pipe, so that the supernatant water is separated by the surface tension, and the supernatant water of the waste water is continuously discharged. Device.