KR101443835B1 - Sewage advanced treatment apparatus using automatic controll ozone nano-micro bubble generator and batch type floating reactor - Google Patents

Abstract

An advanced sewage treatment apparatus using an ozone micro nanobubble generator and a batch-type floating reactor according to the present invention performs water treatment in such a manner that ozone nanobubbles are generated in an ozone micro nanobubble generator; the generated ozone micro bubbles are jetted into the water so that contaminants contained in treated water are oxidized, floated, and sterilized; and decomposed substances and remaining suspended solids are floated. According to the apparatus and method for advanced sewage treatment using the ozone micro nanobubble generator and the batch type floating reactor of the present invention, a batch-type floatation reaction tank using ozone micro nanobubbles is installed downstream of a batch-type advanced activated sludge treatment system, and then a first treated water (BOD, SS of 5-10 ppm or less) is introduced, and a second treatment by oxidation, floatation, and sterilization mechanism in the batch-type floating reaction tank is performed, so that water can be treated to a reusable level.

Description

TECHNICAL FIELD [0001] The present invention relates to an ozone nano-micro bubble generator and an o-sewage advanced treatment apparatus using a batch type flotation tank,

The present invention relates to an o-sewage advanced treatment apparatus and method, and more particularly, to a new o-sewage elevation method of a batch activated sludge process using a batch type flotation tank to which an automatic control mechanism of ozone nano-micro bubble is applied Processing apparatus and method, and a technology in which some techniques can be utilized in the field of water reuse.

Currently, the batch activated sludge elevation treatment method and other advanced treatment methods used for o-wastewater treatment are maintained at an average of about 5 to 10 PPM for biochemical oxygen demand (BOD) and suspended solid (SS). However, the eutrophication of rivers is still serious and the Ministry of Environment is changing its policy to increase the treatment efficiency and reuse water in preparation for the water shortage. However, the conventional floatation method does not have the short residence time which can not maximize the oxidative power generated from the microbubbles, and the treatment efficiency due to the oxidizing power is not high because of the stability of the fluid in contact with the microbubbles.

In order to meet the newly required water treatment standards, water treatment companies are trying to develop methods to apply membrane separation, chemicals, filtration, and adsorption technology. However, these methods are costly to maintain in the long term, and after about 5 years, some equipment is replaced, resulting in an economic burden. In particular, the flooding method of administering existing drugs has high treatment efficiency, but there is a cost to install a dehydration facility due to excessive input of sludge from artificial sludge due to the input of drugs and chemicals.

On the other hand, membrane and filtration filters are mainly applied to increase the treatment efficiency of sewage and sewage. However, this method also requires washing and backing, and after about 5 years, the efficiency is rapidly reduced and the membrane and filter are replaced, which is expensive maintenance cost.

An object of the present invention is to provide an o-wastewater treatment apparatus capable of further improving o-wastewater treatment efficiency of the batch activated sludge process using ozone nano-micro bubbles. Particularly, the treated water subjected to the primary treatment by the batch activated sludge advanced treatment method is subjected to the secondary treatment by the oxidation, sterilization and floating mechanism again using the ozone nano-micro bubble to satisfy the discharged water quality standard which is further strengthened, And an o-sewage advanced treatment device capable of treating o-sewage to a level that can be reused.

According to an aspect of the present invention, there is provided an o-sewage advanced treatment apparatus using ozone nano-micro bubbles. The ozone nano-micro bubble generating apparatus using the ozone nano-micro bubble according to one aspect of the present invention includes: an ozone nano-micro bubble generator generating ozone nano bubbles and micro bubbles; And a water-repellent process in which the ozone nano-bubbles generated in the ozone nano-micro bubble generator is sprayed in water to oxidize and sterilize pollutants in the treated water and spray microbubbles in water to float the decomposed matter and residual suspended matter, ≪ / RTI >

In one embodiment, the present invention includes a batch-type reaction tank for primary treatment of o-wastewater by a batch activated sludge elevation treatment method, wherein the batch-type floatation treatment is a secondary treatment using ozone nano-micro bubbles .

In one embodiment of the present invention, there is provided a process tank for temporarily storing treated water primarily treated in the batch type reaction tank installed between the batch type reaction tank and the batch type floating tank, .

In one embodiment, the ozone nano-micro bubble generator comprises a nano-micro bubble generator generating nano or micro bubbles; A pressurizing pump for pressurizing the treatment water sucked through the suction nozzle and supplying the pressurized water to the nano-micro bubble generator; An air compressor for supplying compressed air to the nano-micro bubble generator; And an ozone generator for supplying ozone to the nano-micro bubble generator, wherein the nano-micro bubble generator selectively generates ozone nano bubbles or micro bubbles by an automatic control unit and is supplied to the inside of the batch floating tank Spray in water.

Another aspect of the present invention relates to a method for treating ozone water using ozone nano-microbubbles. According to another aspect of the present invention, there is provided a method for treating ozone water using an ozone nano-micro bubble, comprising the steps of: introducing treated water into a batch flotation tank; Spraying ozone nano bubbles into the batch flotation tank to oxidize and sterilize contaminants contained in the treated water; Spraying a micro bubble in the water in the batch flotation tank to flocculate the decomposed pollutant after the pollutant in the treated water is oxidized and sterilized; Removing the sludge floating on the surface of the batch flotage tank by a scraper; And discharging the treated water after the flotation sludge is removed from the batch flotation tank.

In one embodiment, the method includes first treating the o-wastewater with an activated sludge elevation treatment method in a batch reactor, wherein the batch floatation treatment secondarily treats the first treated o-wastewater.

In one embodiment, the treated water treated first in the batch reactor tank is temporarily stored in a treatment tank and then supplied to the batch floating tank.

According to the ozone nano-microbubble advanced apparatus and method for treating ozone nano-microbubbles according to the present invention, an automatic controlled batch flotation tank using ozone nano-microbubbles is installed downstream of the batch activated sludge advanced treatment method, , SS 5 ~ 10PPM or less) can be introduced and treated in a batch flotation tank by oxidation, float, and sterilization mechanism to a level that can reuse water.

1 is a block diagram showing an overall configuration of an o-wastewater advanced treatment apparatus using ozone nano-micro bubbles according to a preferred embodiment of the present invention.
Fig. 2 is a view showing a connection structure of the treating water tank of Fig. 1, the batch flotation tank, and the ozone nano-micro bubble device.
3 is a block diagram showing the internal structure of the ozone nano-micro bubble device of FIG.
4 is a flow chart showing the sewage elevation process using ozone nano-micro bubbles.
5 is a view for explaining a mechanism of oxidizing and sterilizing contaminants contained in sewage water by the ozone nano bubble.
6 is a view for explaining a mechanism in which contaminants decomposed by microbubbles float.

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that the same components are denoted by the same reference numerals in the drawings. Detailed descriptions of well-known functions and constructions which may be unnecessarily obscured by the gist of the present invention are omitted.

The new ozone nano-microbubble advanced apparatus and method for treating ozone nano-microbubbles according to the present invention are characterized in that o-wastewater is subjected to first water treatment on the basis of a batch activated sludge advanced treatment method and a batch type flotation tank Is a new o-sewage water treatment method that meets water quality standards for effluent water that is re-treated by secondary treatment of primary treatment water and allows water to be reused.

1 is a block diagram showing an overall configuration of an o-wastewater advanced treatment apparatus using ozone nano-micro bubbles according to a preferred embodiment of the present invention.

1, an o-wastewater advanced treatment apparatus according to a preferred embodiment of the present invention is provided with a settling tank 10, a screen tank 12, and a flow rate adjusting tank 20 through which o-sewage is introduced and stored. The incoming o-wastewater is stored in the flow rate regulator 20 via the settling tank 10 and the screen tank 12. The batch type reaction tank 30, the process tank 40, and the batch floating tank 50 are provided at the downstream of the flow rate adjusting tank 20. Batch reactor 30 first processes o-wastewater by batch activated sludge elevation treatment (SBR). The treated water subjected to the primary treatment is temporarily stored in the treatment water tank 40, and a certain amount is discharged to the batch floating tank 50 in the secondary treatment step using the ozone nano-microbubble. The sludge generated in the batch type reaction tank 30 and the batch floating tank 50 is discharged to the sludge concentration tank 70, concentrated and stored in the sludge storage tank 80 and then carried out. The control panel 90 performs overall control of the advanced processing apparatus according to the respective steps in the primary processing step and the secondary processing step. The ozone nano-micro bubble generator 60 is controlled by the control panel 90 so that ozone nano bubbles and micro bubbles are selectively generated in the secondary processing stage and supplied to the batch floating tank 50.

Fig. 2 is a view showing a connection structure of the treating water tank of Fig. 1, the batch flotation tank, and the ozone nano-micro bubble device.

2, the treatment water tank 40 includes a first water level meter 41 for sensing the water level therein and a treatment water pump 42 for moving the treated water to the batch floating tank 50 do. The batch float tank 50 has a second water level meter 52 for sensing the water level therein and a decanter pump 52 for discharging the treated water subjected to the second treatment. Inside the batch flotation tank 50, a suction nozzle 61 for sucking treated water and a spray nozzle 62 for bubble jetting are provided. The suction nozzle 61 and the spray nozzle 62 are connected to the ozone nano-micro bubble generator 60. A scraper (53) is provided inside the batch floating tank (50) for removing floating sludge.

The treated water subjected to the primary treatment in the batch type reaction tank 30 flows into the batch floating type tank 50 via the treatment water tank 40. The inflow height of the treated water in each tank is measured by the first water level meter 41 provided in the treatment water tank 40 and the second water level meter 51 of the batch floating tank 50, The treatment water pump 42 is operated to allow the treated water to flow into the batch floating tank 50 to a predetermined water level.

3 is a block diagram showing the internal structure of the ozone nano-micro bubble device of FIG.

3, the ozone nano-micro bubble generator 60 comprises a pressurizing pump 63, a nano-micro bubble generator 64, an air compressor 65, and an ozone generator 66. The pressurizing pump 63 is connected to the suction nozzle 61 to suck the treated water in the batch floating tank 50 and supply it to the nano-micro bubble generator 64. The air compressor 65 and the ozone generator 66 generate compressed air and ozone, respectively, and provide them to the nano-micro bubble generator 64.

For example, when ozone nano bubbles are generated, the ozone generator 66 is operated to feed ozone into the nano-micro bubble generator 64 when the process water sucked through the pressurizing pump 63 is supplied. The nano-micro bubble generator 64 generates the nano-sized bubbles of the treated water into which the ozone has been injected by the automatic control unit and injects the water into the batch floating tank 50 through the injection nozzle 62. The size of the nano bubbles generated at this time is in the range of approximately 0.1 mu m to 1 mu m.

When micro bubbles are generated, air is introduced into the process water through the air compressor 65 in the process of supplying the process water sucked through the pressurizing pump 63 to the nano-micro bubble generator 64. The nano-micro bubble generator 64 generates micro-sized bubbles of the treated water into which the air has been injected, and injects the micro-sized bubbles into the batch floating tank 50 through the injection nozzle 62. The size of microbubbles generated at this time is in the range of approximately 10 mu m to 50 mu m.

4 is a flow chart showing the sewage elevation process using ozone nano-micro bubbles. FIG. 5 is a view for explaining a mechanism of oxidizing and sterilizing contaminants contained in ozone water by ozone nano bubbles, and FIG. 6 is a diagram for explaining a mechanism of floating contaminants decomposed by microbubbles.

4 to 6, the treated water subjected to the first treatment in the batch type reaction tank 30 is temporarily stored in the treatment water tank 40 and then moved to the batch flotation tank 50 again to remove the ozone nano- And then processed. The overall control for the secondary processing is performed step by step by the control panel 90 as follows.

First, in step S10, when the treated water primarily treated in the batch type reaction tank 30 flows into the treated water tank 40, when the water level is detected by the first water level meter 42 of the treated water tank 40, (42) operates to discharge the treated water into the batch floating tank (50). The water level of the process water introduced by the second water level meter 51 of the batch floater tank 50 is sensed and the operation of the process water pump 42 is stopped when the process water flows into the predetermined water level.

The ozone nano-micro bubble generator 60 is operated to generate the ozone nano bubble 67 and is continuously sprayed from the lower part of the batch flotation tank 50 through the spray nozzle 62 for a predetermined period of time Oxidation and sterilization of pollutants are achieved.

More specifically, as shown in FIG. 5, when the ozone nano bubble 67 is sprayed (S22), the air bubbles become small as it floats above the water surface (S24) and disappears later. At this time, the strong oxidizing force The pollutant and E. coli are decomposed (S26). Thus, when the primary treatment water subjected to the process of the batch activated sludge advanced treatment method flows into the batch flotation tank 50 and reaches the appropriate water level, the ozone nano-micro bubble generator 60 generates ozone nano bubbles, Lt; / RTI > At this time, the ozone nano bubble 67 has a high oxidizing power and a sterilizing action, and the BOD, SS, T-N and T-P of the first treated water are reprocessed and sterilized.

Particularly, when the ozone nano bubble 67 is injected into the water, the air bubbles become smaller as the air bubbles rise. Since the pressure in the air bubbles increases in inverse proportion to the air bubble, the air bubbles decrease in pressure. The temperature in the bubble suddenly increases due to the action. As a result, at the extinction of bubbles, regions of high temperature and atmospheric pressure are formed. Free radicals are generated because the extreme reaction field is strong enough to forcefully decompose the gas molecules inside the compact. Free radicals generated at this time generate high oxidizing power in the course of changing to original stable because of high energy of generation, and break down surrounding pollutants and destroy microorganisms such as E. coli and viruses.

After the contact reaction of the ozone nano bubble is completed for a predetermined time, the ozone nano-micro bubble generator 60 stops generating ozone nano bubbles and proceeds to step S30 to generate micro bubbles. Microbubbles can float most efficiently the degraded contaminants and residual suspended solids.

6, the micro bubbles 69 generated in the ozone nano-micro bubble generator 60 are uniformly injected (S32) from the lower part of the batch type flotation tank 50 through the injection nozzles 62. More specifically, )do. At this time, the sprayed micro bubble 69 adheres to the fine decomposition material and residual suspended material 52 and floats above the surface of the batch floating bed 50.

When the micro bubble 69 is sprayed sufficiently continuously for a predetermined period of time, the pollutant dissolved in the water and the residual suspended solids 52 float up on the surface of the water. Then, in step S40, the floating sludge floated on the water surface by the scraper 53 is collected and removed, and the removed floating sludge is concentrated in the sludge concentration tank 70, transferred to the sludge storage tank 80, .

When the floatation is completed and all the floatation sludge is removed, the second water level meter 51 and the decanter pump 52 are moved in step S50 to discharge the treated water after completion of the secondary treatment. At this time, the lowered water level of the batch floating tank (50) is continuously detected by the second water level meter (51). So that a small amount of floating sludge is discharged automatically by the decanter pump 52 so as not to be discharged.

The water treatment process using the ozone nano-microbubbles as described above can be carried out up to four times a day with a cycle of operation up to a maximum of 6 hours once. For example, a total of 360 minutes was allowed to flow into the batch flotation tank (50) for 45 minutes, ozone nano bubble contact for 150 minutes, microbubble contact for 90 minutes, flotation sludge removal for 30 minutes, It is possible to design such that one cycle is performed. However, the present invention is not limited to this, but the operation time of each process is variable and is programmed to operate the appropriate time for each process in consideration of the characteristics of the incoming primary process water. The primary treated water may contain a low specific gravity fine material with poor sedimentation ability and the dissolved gaseous contaminant mainly occupies most of it. Therefore, it is subjected to secondary treatment by the floatation and oxidation mechanism, .

The ozone nano-microbubble advanced treatment apparatus and method for treating ozone water using the ozone nano-micro bubbles according to the present invention are characterized in that an automatic control type batch type flotation tank using ozone nano-micro bubbles is installed at the downstream of the batch activated sludge advanced treatment method, Water (BOD, SS 5-10PPM or less) can be introduced and treated in a batch flotation tank by secondary treatment by an oxidation, float, and sterilization mechanism so that water can be reused. Therefore, it is a construction method which is able to reuse the o-sewage in addition to satisfying the discharged water quality standard to be strengthened by sterilizing E. coli by the additional treatment such as BOD, SS, T-N, T-P and high sterilization mechanism.

Therefore, it is possible to easily construct SBR-related construction method and system which are widely applied in the present sewerage system. In addition, it can be connected with other advanced processing methods by installing a device that can control the flow rate. The treatment efficiency of the ozone nano-microbubbles according to the present invention satisfies the discharged water quality standard to be enhanced, and turbidity, color and odor are also removed, and excellent reusing water can be supplied. In the water treatment method of the present invention, the fluid in the batch flotation tank is contacted for a long time in a very stable state (stop state), thereby maximizing the oxidizing power of the ozone nano-micro bubble and greatly improving the treatment efficiency.

The batch flotation tank of the water treatment method of the present invention can be applied to the substructure of the treatment facility and can be applied regardless of the scale since the flotation tank of the present invention requires only one cycle of the pretreatment process. Therefore, the construction cost can be reduced and the construction period can be shortened. In the water treatment method of the present invention, flammable sludge is less generated because the flammable mechanism and the mechanism of decomposing the pollutants by the oxidative force are performed at the same time. Due to the high sterilization effect of ozone nano-microbubbles, Escherichia coli is removed from the flotation flotation tank, eliminating the need to install disinfection facilities at the rear end, thus reducing construction cost. In addition, since there is no need for a replacement cost, ozone is injected into the nano bubble and sprayed into the bubbles. Therefore, the solubility in water is increased and the treatment efficiency is increased, thereby reducing the amount of ozone injected and reducing operating costs. And it is a system that can operate unmanned automatic operation by the control panel and maintenance is very easy.

The embodiments of the apparatus and method for advanced treatment using the ozone nano-microbubbles of the present invention described above are merely illustrative and those skilled in the art will appreciate that various modifications and equivalent It will be appreciated that other embodiments are possible. Accordingly, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

10: Needle setting 11: Screen setting
20: Flow regulator 30: Batch reactor
40: Treatment tank 41: First gauge
42: Treatment tank pump 50: Batch floating tank
51: second gauge 52: decanter pump
53: Scraper 60: Ozone nano-micro bubble generator
61: suction nozzle 62: injection nozzle
63: pressure pump 64: nano-micro bubble generator
65: air compressor 66: ozone generator
70: Sludge concentration tank 80: Sludge storage tank

Claims (7)

An ozone nano-micro bubble generator for selectively generating ozone nano bubbles and micro bubbles by an automatic control unit, and a batch type flotation tank for performing water treatment by inputting selectively generated ozone nano bubbles and micro bubbles,
The ozone nano-micro bubble generator generates ozone nano bubbles under the control of the automatic control unit and injects water into the batch flotation tank to oxidize and sterilize contaminants in the treated water,
Wherein the ozone nano-micro bubble generator generates micro bubbles by spraying water into the batch flotation tank under the control of the automatic control unit to float the decomposed matter and residual flotage in the treated water, Micro - bubble generator and o - sewage advanced treatment system using batch flotation tank. The method according to claim 1,
And a batch type reaction tank for primary treatment of o-wastewater by a batch activated sludge process,
Characterized in that the batch flotation treatment is a secondary treatment of the treated water subjected to the primary treatment using an ozone nano-micro bubble, and an o-sewage advanced treatment apparatus using the batch controlled flotation tank. delete The method according to claim 1,
The ozone nano-micro bubble generator
A nano-micro bubble generator for generating nano or micro bubbles by the automatic adjustment unit;
A pressurizing pump for pressurizing the treated water sucked through the suction nozzle and supplying the pressurized water to the nano-micro bubble generator;
An air compressor for supplying compressed air to the nano-micro bubble generator; And
And an ozone generator for supplying ozone to the nano-micro bubble generator,
Wherein the nano-micro bubble generator selectively generates ozone nano bubbles or micro bubbles and injects the ozone into the water in the batch flotation tank through an injection nozzle. O-sewage advanced treatment device. delete delete delete

Images