KR20030031730A - Apparatus for biological treating waste water using carriers of waste tires - Google Patents

Abstract

PURPOSE: A biological sewage and wastewater treatment apparatus using waste tire as microorganism media is provided, which can fluidize microorganism media filled in reaction tank(10) by using agitator or aeration device thus facilitating upward and downward circulation of air and wastewater and controlling flow rate of fluid in the reaction tank(10) without installing any additional fluidizing plate. CONSTITUTION: The apparatus comprises a rectangular vertical reaction tank(10) having a bottom opened inner cylinder(50) and raw water induction pipe(20) vertically set and branched to a raw water influent pipe(30), in the space between the inner cylinder and tank wall waste tire being stacked; a raw water induction pipe(20) set at the center to the depth to keep a distance from the basement; an inner cylinder(50) hung at the center for circulating water from opened bottom to upward to overflow through upper space (S3); a raw water influent pipe(30) for supplying raw water to the raw water induction pipe(20); an air supply device(61) for supplying air to the air distribution pipe(63).

Description

Apparatus for biological treating waste water using carriers of waste tires}

The present invention relates to a biological sewage and wastewater treatment apparatus using a waste tire carrier for attaching microorganisms.

Since the Industrial Revolution, the amount of sewage and wastewater has been increasing day by day due to the increase of population and the increase of industrial production due to the development of science and technology. Therefore, environmental regulations are gradually being tightened to meet the demand for strict water quality standards and to meet the demand for a pleasant environment.

In particular, in Korea, since January 1, 1996, the wastewater discharge allowance standards for discharged water discharged from wastewater treatment facilities and treated water discharged from industrial facilities have been enforced up to 40% or more, but as the industry develops rapidly, The expansion of existing plants is inevitable, and as a result, the amount of industrial wastewater discharged is also increasing.

However, the currently used sewage and wastewater treatment facilities cannot afford to increase the amount of waste and sewage, and a large amount of installation space and costs are required to expand the sewage and wastewater treatment facilities.

In order to solve this problem, a fluidized bed sewage and wastewater treatment method using an efficient carrier having a faster treatment speed than an activated sludge method has been recently developed. However, the conventional fluidized bed sewage and wastewater treatment methods not only use an aeration device when the carrier flows, but also use an aeration device and an underwater carrier transfer device, as well as to prevent the carrier from flowing out of the reaction tank. In most cases, you will need to install a separate screen.

As a result, when only the aeration device is used, a much larger amount of air must be aerated than the aeration amount required for biological treatment of sewage and wastewater in order to flow the carrier. When the aeration device and the underwater carrier transport device are used together, the underwater carrier transport device is used. Since a separate power is required according to the installation of both the former and the latter, not only a lot of energy is required, but also the efficiency of the underwater carrier transfer device is low, causing the carrier in the reaction vessel to not circulate smoothly, causing a decrease in treatment efficiency.

In addition, in existing installations, it is inevitable to install a separate induction plate for constant circulation of the carrier, which requires a lot of installation cost and has a disadvantage in that installation work is difficult.

An object of the present invention is to solve the conventional problems as described above, dead zone in the reaction tank to facilitate smooth up and down circulation of the carrier, air, and waste water in the reaction vessel with less power It is to provide a biological sewage and wastewater treatment apparatus using waste tire carriers that can minimize) and increase oxygen utilization.

Another object of the present invention is to control the fluid flow and flow rate in the reaction tank without installing a separate induction plate biological waste sewage and wastewater using a waste tire carrier that allows only the treated water to flow out of the reaction vessel without flowing out of the reaction vessel It is to provide a processing device.

In order to achieve the above object, the sewage and wastewater treatment apparatus according to the present invention includes a reaction tank forming a closed space in which a waste tire carrier for attaching microorganisms is filled; It is installed in the reaction vessel, the lower end of the raw water induction pipe to maintain a predetermined interval with the reactor bottom member; It is fixed to the outside of the raw water induction pipe to separate the inner space of the reaction tank into the inner space and the outer space, the top and bottom are maintained at a predetermined interval with the reaction vessel upper member and the bottom member, the treated water introduced into the inner space after the treatment An inner cylinder to which a pipe for discharging to the outside of the reactor is connected; Raw water inlet pipe for supplying external sewage and waste water to the raw water induction pipe; Air supply means installed in the reactor to supply external air into the reactor; And a mixer installed directly below the raw water induction pipe and forcibly circulating the wastewater and the carrier supplied through the raw water induction pipe to the outer space and the inner space. After contact with the microorganisms and mixed liquid microorganisms (MLSS microorganisms) attached to, and contacted with the air (oxygen) supplied through the air supply means is discharged to the outside of the reactor after the microbial contamination treatment proceeds.

The inner cylinder used in the present invention forms a bent portion that is bent inward at a predetermined position of the lower end thereof so that a predetermined length is directed toward the raw water induction pipe, so that the carrier flowing into the inner space of the inner cylinder with the treated water flows into the inner space of the inner cylinder. It will prevent the inflow.

In addition, the air supply means (aeration device) of the present invention includes a vertical exhaust pipe located inside each wall of the reaction tank; Horizontal air pipes connected to the bottom of each vertical air pipe while crossing the reactor; And a plurality of acid pipes connected to each horizontal exhaust pipe for injecting air into the reaction tank to supply air to the wastewater, which is circulated and flows in the outer space together with the carrier.

A horizontal member is fixed to the upper outer surface of the inner cylinder over the entire circumference, and one end of the vertical member corresponding to the bottom face of the upper member of the reactor is fixed to the horizontal member tip. The space formed by the horizontal and vertical members is connected to the inner space formed inside the inner cylinder, and the treated water introduced into the space is discharged to the outside through a pipe connected to the vertical member.

On the other hand, in the present invention, when the air supply means is not installed or the air supply means is not operated in the treatment process, it can act as an anoxic tank necessary for denitrification during the advanced treatment of nitrogen and phosphorus (nitrogen / phosphorus treatment) process. Of course, the operation efficiency of the equipment is increased. At this time, since the carrier is filled in the reaction tank, the microorganisms (MLSS microorganisms) in the mixed solution and the microorganisms attached to the carrier work at the same time, so that a large amount of microorganisms can be used to effectively treat a large amount of nitrogen in a short time. .

1 is a longitudinal cross-sectional view of a sewage and wastewater treatment apparatus according to the present invention.

2 is a plan view of the wastewater and wastewater treatment apparatus according to the present invention, showing a state in which the upper member of the reactor is removed.

Figure 3 is a longitudinal sectional view of the wastewater and wastewater treatment apparatus according to the present invention showing the flow of the carrier, air and wastewater and wastewater when operating the carrier and the wastewater.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a longitudinal sectional view of the wastewater and wastewater treatment apparatus according to the present invention, FIG. 2 is a plan view, and FIG. 2 is a view showing a state in which the upper member of the reactor is removed. The sewage and wastewater treatment apparatus according to the present invention includes a raw water inlet pipe connected to a reaction tank 10, a raw water (ie, sewage and wastewater) induction pipe 20 installed vertically at a center of the reaction tank 10, and a raw water induction pipe 20. 30 and the treated water discharge pipe 40, the inner cylinder 50 provided outside the raw water induction pipe 20, the vertical and horizontal exhaust pipe as an air supply means (aeration device) for injecting and supplying air into the reaction tank 10 And a diffuser 63 connected to the horizontal exhaust pipe 62 and a mixer 70 installed at the bottom of the reactor 10. The configuration and the mutual relationship of each member are as follows.

Reactor and Raw Water Induction Tubes (10 and 20)

Reactor 10 forms a closed space therein, the raw water induction pipe 20 is installed in the center of the reaction tank 10 in the height direction. The upper end of the raw water induction 20 tube corresponds to the central portion of the upper member 11 of the reaction vessel 10, and the lower end corresponds to the central portion of the bottom member 12 of the reaction vessel 10. At this time, the lower end of the raw water induction pipe 20 maintains a predetermined interval with the bottom member 12 of the reaction vessel (10).

Inner Tube (50)

A hollow cylindrical inner cylinder 50 having a predetermined height is installed around the raw water induction pipe 20, so that the inner space of the reaction tank 10 is based on the inner cylinder 50 and the reaction tank 10. ) Into an outer space S1 between the walls and an inner space S2 between the inner cylinder 50 and the raw water induction pipe 20. The upper end of the inner cylinder 50 maintains a predetermined interval with the upper member 11 of the reaction vessel 10, the lower end also maintains a predetermined interval with the lower member 12 of the reaction vessel 10. As shown in Figure 1, by forming a bent portion 51 bent inward at a predetermined position of the lower end of the inner cylinder 50, the predetermined length of the lower end of the inner cylinder 50 is configured to face the raw water induction pipe 20.

On the other hand, as shown in Figure 1, a separate space is formed on the upper outer side of the inner cylinder (50). That is, a horizontal member H is fixed to the upper portion of the outer side of the inner cylinder 50 over the entire circumference, and one end of the horizontal member H is vertically corresponding to the bottom surface of the upper member 11 of the reactor 10. Another end of the member V is fixed. Therefore, the space S3 (hereinafter referred to as "upper space") formed by the horizontal and vertical members H and V is connected to the inner space S2 of the inner cylinder 50.

Raw Water Inlet Pipe (30)

The raw water inlet pipe 30 connected to an external raw water supply means (not shown) is connected to the raw water induction pipe 20 through the reaction tank 10 and the inner cylinder 50. Therefore, raw water (waste water) is supplied to the raw water induction pipe 20 through the raw water inflow pipe 30.

Treated water discharge pipe (40)

The treated water discharge pipe 40 is connected to the vertical member V forming the upper space S3 described above on the inner cylinder 50, and the treated water discharge pipe 40 penetrates the wall of the reactor 10. To correspond with the outside.

Air line (61, 62) and diffuser (63)

An air supply means is located inside the reactor 10 as an aeration device for injecting and supplying outside air into the reactor 10. As shown in FIGS. 1 and 2, each of the four inner walls of the reactor 10 has vertical exhaust pipes 61, and horizontally across the reactor 10 at the bottom of each vertical exhaust pipe 61. The air supply pipe 62 is connected. In addition, a plurality of diffusers 63 for injecting air into the reaction tank 10 are connected to each horizontal exhaust pipe 62.

Mixer (70)

As shown in FIG. 1, a mixer 70 is installed at the center of the bottom member 12 of the reactor 10, that is, directly under the raw water induction pipe 20. The mixer 70 is equipped with an impeller to suck the raw water supplied through the raw water induction pipe 20, and then performs a function of discharging in all directions through the lower end. Since the configuration of the mixer 70 is a general one, detailed description thereof will be omitted.

On the other hand, the waste tire carrier used in the present invention is known to be capable of high-speed treatment of waste water by fixing mechanically many microorganisms on the surface because of its high mechanical wear resistance and chemical resistance, excellent strength and adhesion strength of inorganic powder.

Such a waste tire carrier is described in detail in the Republic of Korea Patent No. 188878, patented in the name of the applicant and its function, and therefore, the description thereof will be omitted.

The operation of the present invention configured as described above will be described in detail with reference to the drawings.

Figure 3 is a longitudinal cross-sectional view of the wastewater and wastewater treatment apparatus according to the present invention showing the flow of the carrier, air and wastewater when the carrier and the wastewater in the reaction vessel is filled, the black circle in Figure 3 White circles, respectively, show bubbles.

Sewage and wastewater introduced through the raw water inlet pipe 30 flows downward along the raw water induction pipe 20 installed in the center of the inner cylinder 50 in the reaction tank 10 and installed in the bottom member 12 of the reaction tank 10 ( 70). The sewage and wastewater moved to the mixer 70 are uniformly circulated with the carrier and the air in the reaction tank 10 by the mixer 70.

That is, the sewage / waste water sucked into the mixer 70 from the raw water induction pipe 20 by the suction force of the mixer 70 is mixed with the carrier and the mixed liquid contained in the reaction tank 10 according to the operation of the mixer 70. 70) is discharged to the bottom, and then flows upwards (i.e., the outer space) in the direction shown in FIG. 2 by the rotational force of the mixer 70, i.e., the bottom member 12 and the side wall at the lower center of the reactor 10. (In S1). In this flow process, the sewage and wastewater come into contact with the microorganisms attached to the carrier and the mixed solution microorganisms (MLSS microorganisms).

At the same time, the sewage and wastewater also come into contact with the particulate air bubbles sprayed from the diffuser 63 installed adjacent to each wall of the reaction tank 10 to receive oxygen necessary for microorganisms to treat contaminants. The carrier and the mixed liquid that flowed in a large flow to the outer space S1 of the reaction tank 10 by the mixer 70 receive the lifting force of the air injected from the diffuser 63, and thus, the wall of the reaction tank 10 at a higher speed. Will rise along. At this time, due to the rapid rise of the carrier and the mixed solution, the pressure at the bent portion 51 formed at the lower portion of the inner cylinder 50 is lowered, and as a result, the upper portion of the outer space S1 of the reaction vessel 10, that is, near the water surface is reached. One carrier, the mixed liquid, and the air are circulated downward along the outer wall of the inner cylinder 50 to the lower portion of the outer space S1 of the reaction tank 10.

When the carrier and the mixed liquid reach the bent part 51 of the lower portion of the inner cylinder 50 in the outer space S1, the carrier having a higher specific gravity (specific gravity of the carrier: 1.06 to 1.09) is continuously lowered to the lower portion of the reaction tank 10 and the mixer ( 70 is recycled in the outer space S1 of the reaction tank 10, and only the sewage / wastewater (contaminated with a mixed solution, hereinafter referred to as “treated water”) from which contaminants have been removed by microorganisms is provided in the inner cylinder 50. And flows into the inner space S2 formed between the raw water flow pipe 20 and then rises. Elevated treated water is introduced into the upper space (S3) formed on the upper outside of the inner cylinder 50, the upper end of the inner cylinder 50, the treated water introduced into the upper space (S3) through the treated water discharge pipe 40 through the reaction tank ( 10) spill out.

This series of circulating actions is effected by the operation of the mixer 70, which uses relatively little power, and in particular, through the diffuser 63, only oxygen is supplied in an amount necessary to decompose contaminants. At this time, the depth of the diffuser 63 is installed at a position that is 1: 1 to 3: 1 from the top according to the depth of the reaction tank 10 on the basis of a constant height, that is, the effective depth of the reaction tank 10 at the bottom of the reaction tank 10. In the reaction tank of about 6m to 15m, it is possible to supply oxygen smoothly as a blower for general water treatment.

The specification of the inner cylinder 50 installed at the center of the reactor 10 plays an important role in preventing the carrier from circulating smoothly in the reactor 10 and not flowing out of the reactor 10. The diameter of the inner cylinder 50 is determined according to the inflow flow rate and the size of the reaction tank 10 within the range of 1/2 to 1/4 of the width of the reaction vessel, and the height is 1/2 to 2/3 of the effective depth of the reaction vessel. 50) The rising flow rate in the interior (that is, the inner space S2) is set to 0.5 to 1.5 m / min.

Among the carriers and the mixed liquid lowered to the lower part of the outer space S1 in the mixed liquid circulation process in the reaction tank 10, the carrier flows with the treated water to the lower part of the outer space S1 and then the inner space S2 inside the inner cylinder 50. In order to prevent the inflow into the inner portion of the inner cylinder 50, the lower portion 52 of the inner cylinder 50 at an inclination angle of 30 ° to 60 ° within the range of 1/10 to 1/20 of the inner cylinder 50, that is, induction of raw water Bending toward the tube 20, the length and inclination angle of the bent portion 52 are also determined according to the inflow flow rate and the size of the reactor.

Table 1 below compares the power consumption of the present invention using a mixer and an acid pipe and a conventional fluidized bed bioreactor using only a blower in a reactor with a sewage throughput of 100,000 m ³ / day.

Mixer power requirements Blower Power Requirements Total power requirement The present invention 30 kW 540kW 570 kW Conventional reactor - 1,010kW 1,010kW

Among the functions of the reaction tank, when the carrier, the wastewater and the mixed liquid are mixed using only the mixer 70 without installing the aeration devices (the air pipes 61 and 62 and the acid pipe 63), the inside of the reaction tank is air. May become an anaerobic or anoxic state that is not supplied, and may act as an anaerobic tank necessary for denitrification during advanced treatment of wastewater and wastewater (nitrogen and phosphorus treatment).

At this time, in the reaction tank 10, the carrier and the mixed liquid are circulated only by the stirring action of the mixer 70, so that the carrier is not discharged to the outside of the reaction tank, and only the treated water is discharged. Because the microorganisms work together, a large amount of microorganisms can be used to remove nitrogen in a shorter time than a typical anoxic tank in which only mixed liquid microorganisms (MLSS microorganisms) act.

As described above, in the biological sewage and wastewater treatment apparatus using the waste tire carrier according to the present invention, the waste tire carrier for attaching microorganisms is filled in a reaction tank, and then the carrier is flowed using a mixer and aeration device to efficiently and efficiently use less power. It is possible to smooth the up and down circulation of carrier, air and waste water in the reactor, and to control the flow and flow rate of the fluid in the reactor by using the inner tube and mixer without installing a separate guide plate. There is an effect made easily.

In addition, when the aeration device (transmission pipe and diffuser) is not installed or not operated, a high efficiency anoxic tank that can be applied to the advanced treatment of sewage and wastewater can be obtained, thereby maximizing the use efficiency of the equipment. .

Claims (4)

In the biological sewage and wastewater treatment apparatus using waste tire carrier, A reaction tank for forming a sealed space in which a waste tire carrier for attaching microorganisms is filled; A raw water induction pipe fixed in the reactor and having a lower end and a predetermined distance from the reactor bottom member; It is fixed to the outside of the raw water induction pipe to separate the inner space of the reaction tank into the inner space and the outer space, the top and bottom are maintained at a predetermined interval with the reactor upper member and the bottom member, the treated water introduced into the inner space after the treatment Inner cylinder is connected to the discharge pipe to the outside of the reactor; Raw water inlet pipe for supplying external sewage and waste water to the raw water induction pipe; Air supply means installed in the reactor to supply external air into the reactor; And Sewage / wastewater is installed under the raw water induction pipe and includes a mixer for forcibly circulating the wastewater and carrier supplied through the raw water induction pipe to the inner space through the external space. A sewage and wastewater treatment device which comes into contact with a mixed solution microorganism (MLSS microorganism) and is discharged to the outside of the reactor after the microbial contamination treatment is performed by contacting the air (oxygen) supplied through the air supply means. According to claim 1, wherein the inner cylinder is formed at the lower end of the bent portion inwardly bent to configure a predetermined length toward the raw water induction pipe, so that the carrier flows to the lower portion of the outer space with the treated water through the lower end of the inner cylinder Sewage / wastewater treatment apparatus which prevents the inflow into the inner space inside an inner cylinder. In the biological sewage and wastewater treatment apparatus using waste tire carrier, A reaction tank for forming a sealed space in which a waste tire carrier for attaching microorganisms is filled; A raw water induction pipe fixed in the reactor and having a lower end and a predetermined distance from the reactor bottom member; It is fixed to the outside of the raw water induction pipe to separate the inner space of the reaction tank into the inner space and the outer space, the top and bottom are maintained at a predetermined interval with the reactor upper member and the bottom member, the treated water introduced into the inner space after the treatment Inner cylinder is connected to the discharge pipe to the outside of the reactor; Raw water inlet pipe for supplying external sewage and waste water to the raw water induction pipe; Under the raw water induction pipe, a wastewater and wastewater, which are installed under the raw water induction pipe and forcedly circulated to the external space and the internal space, are mixed with the microorganisms and the mixed liquid attached to the carrier. Waste tires characterized in that they can act as an anoxic tank required for denitrification during advanced processing of wastewater and wastewater (simultaneous treatment of nitrogen and phosphorus) after being discharged to the outside of the reactor after the microbial contamination treatment proceeds in contact with the microorganism (MLSS microorganism). Biological sewage and wastewater treatment apparatus using a carrier. 4. The inner cylinder of claim 3, wherein the inner cylinder includes a bent portion that is bent inwardly at a predetermined position of the lower end thereof so that a predetermined length of the inner cylinder is directed toward the raw water induction pipe so that the carrier flowing into the lower portion of the inner cylinder with the treated water flows into the inner space of the inner cylinder. Sewage and wastewater treatment device to prevent the inflow into the water.