KR20160109584A - Apparatus for disposing hyperbric waste water - Google Patents

Abstract

The present invention relates to an apparatus for disposing high concentration wastewater and, more specifically, to an apparatus for disposing high concentration wastewater which can effectively dispose the introduction of high concentration wastewater by increasing the discharge amount of phosphorus from an anaerobic tank and maximizing the removal rate of phosphorus in a dissolved air flotation tank.

Description

[0001] Apparatus for disposing hyperbric waste water [0002]

The present invention relates to a high-concentration wastewater treatment apparatus, and more particularly, to a high-concentration wastewater treatment apparatus capable of effectively increasing the phosphorus discharge amount in an anaerobic tank and maximizing the phosphorus removal rate in a pressurized flotation tank, .

Recently, as the industrial development and living standard have improved, the water quality of the discharged water has been improved by improving the water quality pollution of discharged water, improving citizens' awareness of environmental pollution, And the necessity of recycling of treated water due to lack of water resources is emerging, and the necessity of advanced treatment is increasing day by day.

Currently, the wastewater treatment process is a biological process using activated sludge, and a method of reducing the concentration of organic substances in the wastewater is adopted by allowing aerobic microorganisms to oxidize and acquire organic matter under exhalation conditions.

Conventional biological processes treat organic matter and nutrients of wastewater flowing into the microbial state through anaerobic, anoxic, and aerobic processes. Phosphorus is released in the anaerobic state, and released phosphorus is lifted up as the microorganism proliferates under aerobic conditions, and is removed due to the surplus sludge being carried out in the process. In the exhalation state, as described above, microorganisms proliferate and phosphorus is over-consumed, organic matter is oxidized, and at the same time, the nitrogen component in the form of ammonia is converted into nitric nitrogen (NO 3 -Nitrate) through the form of nitrite nitrogen . The converted nitrogen component flows into the anoxic tank through internal transport and is reduced to nitrogen gas (N2) in the anoxic state and then extinguished into the atmosphere.

Most biological nitrogen and phosphorus removal processes are based on the A2O process. However, even in the case of the A2O process, since the sedimentation tank is the last stage for producing the final treated water, the problem of deterioration of the treated water due to sedimentation of the activated sludge is inherent as in the standard activated sludge process.

In order to prevent deterioration of treated water due to sedimentation of activated sludge, a membrane filtration process for separating microorganisms and treated water has been introduced since the 1980s, and related technology is disclosed in Korean Patent No. 0401720 ("Anaerobic / And an anaerobic / aerobic tank and a membrane separation process ").

The separator can completely eliminate the passage of the particulate material having a pore size larger than the pore size. Because of this characteristic, when the membrane filtration process is introduced into the sewage and wastewater treatment process, the particulate matter can be completely removed regardless of the sedimentation of the activated sludge, thereby ensuring stable treatment water at all times. Also, since the outflow of activated sludge from the microbial reaction tank can be completely eliminated and the concentration of the activated sludge can be easily controlled, it is possible to maintain a high microbial concentration in the reaction tank. Maintaining a high microbial concentration in the biological treatment process means maintaining a large number of active microbial concentrations per unit volume, which enables the treatment of larger amounts of sewage and wastewater through smaller sites. It also enables stable treatment for high organic load. This is commonly referred to as a Membrane Bio-Reactor (MBR) process.

However, in spite of the progress of such advanced treatment technology, when the wastewater of high concentration is introduced, the treatment efficiency is decreased, and the phosphorous component contained in the high concentration wastewater is not effectively removed. That is, there is a need for a technique that can effectively treat high-concentration wastewater even when it is introduced.

Domestic patent No. 0401720 ("Wastewater treatment process using anaerobic / anoxic and anoxic / aerobic tank and membrane separation")

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-mentioned problems, and an object of the present invention is to provide a method and apparatus for increasing the amount of phosphorus contained in a high concentration wastewater in an anaerobic tank, The present invention provides a high-concentration wastewater treatment apparatus capable of effectively performing treatment even at a high concentration.

The wastewater treatment apparatus according to an embodiment of the present invention includes an anaerobic tank for storing waste water flowing from the outside and discharging microorganisms by phosphorus discharge, partitioned by partition walls, and transferring some of the supernatant to the pressurized floating tank; An anoxic tank for removing nitrogen in the treated water flowing from the anaerobic tank; An aerobic tank in which organic matter oxidation and nitrification are performed in the treated water flowing from the anoxic tank and the phosphorus removal microorganisms absorb excess phosphorus; An anoxic tank, and an oxic tank through which the treated water subjected to the biodegradation treatment flows in order and the treated water from which the solid matter has been removed through the separation membrane provided therein is transferred to the effluent tank; A sedimentation accelerator for causing the conveying sludge to flow in from the membrane separation tank, causing the conveying sludge to be deaerated and sedimented and separated, and the sedimentation sludge being conveyed to the anaerobic tank; And a flocculating tank into which the main flocculant and the auxiliary coagulant are introduced to generate flocculated flocculated water in the supernatant, wherein flocculant containing phosphorus is floated to remove And a pressurized floating tank for holding the pressurized fluid.

At this time, the anaerobic tank is provided with a stirrer, a first space part where the wastewater is mixed by the stirrer to induce the release of the wastewater, and a sedimentation of the microorganisms contained in the treated water flowing in from the first space part, The precipitated microorganism is transferred to the anoxic tank and the supernatant is transferred to the pressurized floating tank by the negative type pumping device.

In addition, the sub-type pumping device may include an air cylinder to float on top of the second in-process water by buoyancy, a tank provided on the upper side of the air cylinder and having an open upper end, and a pump installed in the tank And the supernatant flowing into the tank and flowing into the tank can be transferred to the pressurized floating tank using the pump.

At this time, the suspended substances contained in the supernatant transferred from the anaerobic tank to the pressurized floating tank may act as agglomeration nuclei for increasing the agglutination rate in the agglomeration tank.

In addition, the aerobic tank and the membrane separation tank can be formed into a single treatment tank.

In the wastewater treatment apparatus according to an embodiment of the present invention, the anaerobic tank is divided into a first space portion and a second space portion by a partition wall, the first space portion performs stirring to maximize phosphorus emission, and the second space portion performs stirring In the process of inducing sedimentation and transferring the supernatant to a pressurized floating tank using a sub-type pumping device, the suspended solids in the supernatant increase cohesion efficiency and maximize phosphorus removal.

That is, as the amount of phosphorus is increased through the anaerobic tank of the new structure and the phosphorus removal amount is increased in the pressurized flotation tank, the treatment efficiency is maximized even when a high concentration of wastewater is introduced.

1 is a configuration diagram of a wastewater treatment apparatus according to an embodiment of the present invention;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

1 is a block diagram of a wastewater treatment apparatus according to an embodiment of the present invention.

1, the high concentration wastewater treatment apparatus according to an embodiment of the present invention includes an anaerobic tank 100, an anoxic tank 200, an aerobic tank 300, a membrane separation tank 400, a sedimentation tank 500, And a pressurized floating tank (700).

The anaerobic tank 100 is a treatment tank in which the effluent from the outside is stored and the microbes (MLSS: Mixed Liquor Suspended Solid) is discharged. The inside of the anaerobic tank 100 is partitioned by partition walls. .

Specifically, the anaerobic tank 100 is divided into a first space part 110 and a second space part 120 by partition walls, and wastewater flows into the first space part 110. At this time, since the anaerobic state of the first space part 110 is maintained and uniform mixing is performed by the stirrer 111 installed in the lower part of the first space part 110, the organic matter contained in the wastewater is used as a carbon source, A large amount of phosphorus is released into the water.

The treated water sufficiently mixed in the first space part 110 flows into the second space part 120 and stored in the second space part 120 for a predetermined time without stirring the treated water. Induced microbial precipitation. After a certain period of time, the precipitated microorganisms are transferred to the anoxic tank 200, and the supernatant is transferred to the pressurized floating tank 700 by the negative pumping device 121.

More specifically, the sub-type pumping device 121 provided in the second space portion 120 includes a single or a plurality of air chambers 121a, which are floated on top of the second in-process water by buoyancy, And a pump 121c installed in the tank 121b so that the supernatant flowing into the tank 121b and flowing into the tank 121b can be circulated by using the pump 121c To the pressurized floating tank (700).

On the other hand, the anoxic tank 200 is a treatment tank for removing nitrogen in the treatment water containing a large amount of microorganisms flowing from the anaerobic tank 100. An agitator 201 is also installed in the lower part of the anoxic tank 200 to cause denitrification in an anoxic state.

In the oxic tank 300, the treated water treated in the anoxic tank 200 is introduced, and organic matter oxidation and nitrification are performed in the treated water while air is supplied to maintain the exhalation state, and the phosphorus removal microorganisms absorb excess phosphorus.

As described above, the treated water that has passed through the anaerobic tank 100, the anoxic tank 200, and the aerobic tank 300 in order, and subjected to biological decomposition treatment, flows into the membrane separation tank 400.

Membrane Bio Reactor (MBR) process is performed to remove solid matter through a separation membrane 410 provided in the membrane separation tank 400. After the process is completed, the treated water is discharged into a discharge tank (not shown) And is discharged to the outside.

At this time, as shown in the figure, the aerobic tank 300 and the membrane separation tank 400 may be divided into respective treatment tanks, but they may be formed by one treatment tank.

On the other hand, the conveying sludge flows into the sedimentation 500 from the membrane separation tank 400, the dissolved oxygen in the conveying sludge is deaerated by the stagnation time in the sedimentation 500, the solid matter in the conveying sludge is sedimented, do. The settling sludge in the settling tank is transported to the first space 110 of the anaerobic tank 100 through internal transportation.

Further, as shown, the supernatant in the sedimentation relief 500 may be transferred to a pressurized floating tank 700, which will be described later, but may not be, and is selectively applicable according to needs of those skilled in the art.

Lastly, the pressurized floating tank 700 receives the supernatant of the second space 120 of the above-mentioned anaerobic tank 100, removes the phosphorus contained in the supernatant in a scum form, 200).

More specifically, the pressurized floating tank 700 includes a flocculation tank 600 at the front end thereof. The supernatant flows into the flocculation tank 600 and the main flocculant and the auxiliary coagulant are injected into the flocculation tank 600, In the course of the reaction, coagulated water is produced in the supernatant. At this time, the supernatant transferred from the anaerobic tank 100 to the flocculation tank 600 of the pressurized floating tank 700 contains suspended solids (SS) of about 100 to 200 mg / L, The agglomeration efficiency of the main flocculant and the auxiliary flocculant is enhanced and the flocculant efficiency of the flocculant is increased to maximize the phosphorus removal rate in the pressurized floating tank 700. [

For reference, the primary coagulant is polyaluminum chloride (PAC) and the secondary coagulant may be a polymer, but is not limited thereto.

The pressurized floating tank 700 floats the scum contained in the flocculated water generated in the flocculation tank 600. At this time, although not shown in the drawing, the pressurized floating tank 700 is provided with a pressurizing tank (not shown) It is preferable to be connected. The pressurized tank circulates the flocculated water in the pressurized floating tank 700 and pressurizes the flocculated water to generate bubbles.

Therefore, the scum is lifted by the bubbles generated from the pressurizing tank in the pressurized floating tank 700, and the floated scum is separately transported and stored in the scum storage tank (not shown). At this time, the scum is about 2 ~ 5% of solid matter.

The sedimentation sludge in the sedimentation accelerator 500 may be internally transported into the anaerobic tank 100 as described above, but in some cases, some sedimentation sludge may be transported to the pressurized floating sludge tank 700. The sludge can be reduced in volume by removing the sludge in the pressurized floating tank 700.

In this case, the treated water from which the scum is removed from the pressurized floating tank 700 is transferred to the anoxic tank 200 and then processed. At this time, the polymer material (SMP, EPS, etc.) The separation membrane flow is improved from 0.3 m / d to 0.4 m / d since the separation membrane is removed from the floating tank 700, and the membrane cleaning cycle of the membrane separation (MBR) process is extended, There is an effect that can be made.

In particular, the wastewater treatment apparatus according to an embodiment of the present invention divides the anaerobic tank 100 into a first space 110 and a second space 120 by partition walls, 110 are stirred to maximize the release of phosphorus and the second space 120 induces precipitation without stirring and transfers the supernatant to the pressurized floating tank 700 using the negative pumping device 121 In the process, suspended solids in the supernatant increase coagulation efficiency and maximize phosphorus removal.

That is, as the phosphorus removal amount is increased through the anaerobic tank 100 having a new structure and the phosphorus removal amount is increased in the pressurized floating tank 700, the treatment efficiency is maximized even when the high concentration wastewater flows.

It will be understood by those skilled 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 by the appended claims.

100: Anaerobic tank
110: first space part 120: second space part
200: Anoxic
300:
400: membrane separation tank
500: Highlighting
600: coagulation tank
700: Pressurized floating tank

Claims (5)

An anaerobic tank 100 for storing waste water flowing from the outside to discharge phosphorus of microorganisms, partitioned by partition walls, and transferring some of the supernatant to the pressurized floating tank 700;
An anoxic tank 200 for removing nitrogen in treated water flowing from the anaerobic tank 100;
An aerobic tank 300 in which organic matter oxidation and nitrification are performed in the treated water flowing from the anoxic tank 200 and phosphorous removal microorganisms absorb excess phosphorus;
The treated water which has passed through the anaerobic tank 100, the anoxic tank 200 and the aerobic tank 300 in turn passes through the biodegradation treated water and flows through the separation membrane 410 provided therein to remove the solid matter from the treated water, A membrane separation tank 400 for transferring the water;
A sedimentation accelerator (500) for introducing the conveying sludge from the membrane separation tank (400), performing degassing and sedimentation separation of the conveying sludge, and returning the sedimentation sludge to the anaerobic tank (100); And
And a flocculation tank (600) into which the supernatant in the anaerobic tank (100) flows and in which the main coagulant and the auxiliary coagulant are injected to generate coagulated flocculated water in the supernatant, A pressurized floating tank 700 for floating and removing the scum;
And a controller for controlling the wastewater treatment device.
The method according to claim 1, wherein the anaerobic tank (100)
A first space part 110 in which the agitator 111 is installed and the waste water is mixed by the agitator 111 to induce the release of the waste water,
The precipitated microorganisms are transferred to the anoxic tank 200 and the supernatant is introduced into the pressurized floating tank (not shown) by the sub-type pumping device 121, 700, a second space 120,
And a controller for controlling the wastewater treatment device.
3. The apparatus of claim 2, wherein the sub-type pumping device (121)
An air tank 121a which floats on top of the second in-process water by buoyancy, a tank 121b provided on the upper side of the air tank and opened at the upper end, and a pump 121c installed in the tank Lt; / RTI >
And transfers the supernatant flowing into the tank through the pump to the pressurized floating tank (700) using the pump.
The method according to claim 1,
Wherein suspended substances contained in the supernatant transferred from the anaerobic tank (100) to the pressurized floating tank (700) act as agglomeration nuclei for increasing the cohesion rate in the coagulation tank (600).
The method according to claim 1,
Wherein the aerobic tank (300) and the membrane separation tank (400) are formed into a single treatment tank.

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