KR100390010B1 - Apparatus for the purification of river pollution by tube type media attaching microorganism - Google Patents

Abstract

The present invention is to provide an apparatus for purifying streams using a tube made of hollow fiber or a corresponding material as a medium to which microorganisms can attach in biological treatment of pollutants contained in river water or the like.

The apparatus of the present invention is provided with a means for generating and filtering compressed air, a hollow fiber tube having fluidity and elasticity through which air can pass, and microorganisms attached to an outer surface thereof, and a plurality of such tubes. The dog is characterized by consisting of means for distributing air connected like a net.

Apparatus according to the present invention in purifying the stream by using the media, it is possible to supply air in the hollow tube to facilitate oxygen transfer to the microbial membrane to prevent desorption of microorganisms attached to the outside of the tube. In addition, due to the elasticity and fluidity of the media, there is an effect that can appropriately respond to a fast flow rate during normal rainy times or a slow flow rate.

Description

FIELD OF THE PURIFICATION OF RIVER POLLUTION BY TUBE TYPE MEDIA ATTACHING MICROORGANISM}

The present invention relates to a stream purification apparatus using a tube-type microorganism-mediated medium. More specifically, in the biological treatment of contaminants contained in river water, etc., the media can be attached to the media (carriers) to the apparatus for purifying the stream using a tube made of hollow fiber or a corresponding material. It is about.

Conventionally, when biologically treating contaminants contained in river water or the like, microorganism-mediated media are mainly used materials such as crushed stone, gravel, plastic, waste tires, waste concrete, and the like. Filled, fixed-bed media, which process contaminated water between median media, have become mainstream.

However, in the case of using the fixed-phase media as described above, after a certain period of time, the thickness of the microbial membrane becomes thick and the aerobic condition is formed on the surface of the microbial membrane using oxygen dissolved in water, but oxygen does not penetrate inside the microbial membrane. It becomes anaerobic and detaches the attached microbial membrane. In addition, as the attached microbial membrane becomes thicker, the gaps between medians become narrower, and the voids frequently occur.In the rainy season, the microbial membranes fall off due to an increase in flow rate and must be shut down due to the inflow of earth and sand. There was a problem.

The present invention has been devised to solve various problems such as microbial membrane detachment, clogging of the media, and shutdown during rainy season, which are problems caused by the use of a packed fixed bed media.

In other words, as the thickness of the microbial membrane becomes thicker, an anaerobic condition is formed inside the microbial membrane, and a hollow tube-type media is used as a solution to the problem of desorption of the microbial membrane. By using the inside as a tube through which air can pass, the dissolved oxygen dissolved in the tube is transferred to the inside of the microbial membrane, thereby preventing the clogging of the microbial membrane or the blocking of the media. .

1 is a schematic diagram of a stream purification apparatus using a tube-type microorganism-mediated media according to the present invention.

FIG. 2 is a plan view of the tube-type microorganism-attached media of FIG. 1. FIG.

3 is a schematic perspective view showing a state in which the tube-type microorganism-attached media of FIG. 1 is installed in water.

FIG. 4 is a schematic perspective view illustrating a state in which the tube-type microorganism-attached media of FIG. 3 is disassembled.

1 --- Compressor 2 --- Air Filter

3 --- Air Distribution Plate 4 --- Tube Type Media

5 --- pipe 6 --- hole

7 --- Mountain Stone 8 --- Bubble

9 --- sleep 10 --- microbial membrane

11 --- spring 12 --- bolt

13 --- Head 14 --- Thread

15 --- thread

The stream purification treatment apparatus using the tube-type microorganism-mediated media of the present invention is a device for generating and filtering compressed air, and a portion of the air at a predetermined pressure injected from the air generating means passes through the inside in the form of fine bubbles, Its outer surface has a hollow fiber tube composed of threaded fabrics arranged in a zigzag form in a vertical direction to which microorganisms are attached, and a hole through which the tubes can be installed on the upper surface, and a part of air of a predetermined pressure is changed on the side. It is characterized by consisting of a hollow air distribution means in which a plurality of pipes for delivery to the air distribution means are provided.

According to the present invention, the hollow fiber tube is provided with a spring having elasticity therein to be able to flow in accordance with the flow of water.

In addition, the lower surface of the fiber tube is open, the upper surface is sealed in a round shape, there is a built-in mountain stone to finely bubble the air flowing from the lower surface to rise vertically.

In addition, according to the present invention, a plurality of air distribution means are connected like nets in all directions through pipes through which air is transmitted.

The present invention will be described in more detail with reference to the accompanying drawings as follows.

In the accompanying drawings, Fig. 1 shows an overall schematic diagram of a stream purification treatment apparatus using a tube-type microorganism-mediated medium, in which 1 is a compressor for generating compressed air at a predetermined pressure, and 2 is generated from the compressor 1. It is an air filter which filters the filtered air, The code | symbol 3 is the air distribution board which inflows and distributes the air of the predetermined pressure which came out from the air filter 2. As shown in FIG. And reference numeral 4 is a tube-type microorganism-mediated medium composed of a woven fabric installed on the upper surface of the air distribution plate 3, and reference numeral 5 is a pipe installed on the side of the air distribution plate 3.

That is, according to Figure 1, the stream purification apparatus using the tube-type microorganism with the media according to the present invention is a hollow air distribution plate after the air compressed at a predetermined pressure by the compressor (1) passes through the air filter (2) (3) injected into the inside, part of the air at a predetermined pressure inside the air distribution plate (3) is transferred into the tube-type microorganism attachment medium (4), and the other part through the pipe (5) to another air distribution plate It is configured to be delivered to (3).

FIG. 2 shows a plan view of an air distribution plate 3 in which the tube-type microorganism-mediad media 4 of FIG. 1 can be installed. According to FIG. 2, the tube-type microorganism-mediated media 4 of the present invention is shown in FIG. A plurality of air distribution plates 3 which can be installed are connected to each other like a net in all directions by several pipes 5. The air distribution plate 3 according to the present invention can be molded and made of FRP or PVC material, for example, 1m wide, 1m long, 30cm high, and 3cm thick to facilitate handling in the field, and the air distribution plate 3 The upper surface of the tube-type microorganisms attached to the media (4) is about 300 to 400 holes 6 are formed.

FIG. 3 is a view schematically showing a state in which one tube-type microorganism attached media 4 according to the present invention is installed in the air distribution plate 3 and a state in which they are disposed in contaminated water in a river. When the hollow air distribution plate 3, which is equipped with a tube-type microorganism-mediated media 4 made of fibers composed of a woven fabric according to the present invention, is immersed in water, water is introduced into the media 4 by water pressure. When the air is injected into the air distribution plate 3, the injected air passes through the acidic rocks 7 installed on the lower surface of the media 4, whereby microbubbles 8 are generated to form media ( 4) The concentration of dissolved oxygen is increased in the water, and the undissolved zone gas is discharged through the upper portion of the media (4). As shown in FIG. 3, the upper portion of the media 4 can be made higher than the water surface 9 so that the undissolved zone gas can be smoothly escaped, and even if the upper portion of the media 4 is submerged in water, it is generated by air supply. Bubbles in the water rise only vertically due to the buoyancy of the bubbles will not escape to the side of the media (4) but only to the top.

Oxygen dissolved in the media 4 is transferred to the inside of the microbial membrane 10 attached to the outer surface of the media 4 through the pores between the weft and warp of the fiber by the concentration difference, and thus the microbial membrane ( 10) inside the aerobic conditions are formed to increase the adhesion of microorganisms, thereby preventing the detachment of the microbial membrane.

The hollow tube-type microorganism-mediated medium 4 of the present invention is a fabric woven by crossing weft and warp yarns having a diameter of 20 μm and a diameter of a single strand of about 300 μm. It is clogged as a type, and the lower surface is provided with an acidic stone 7 and is open to allow air to be injected.

FIG. 4 is a view schematically showing a state in which the air distribution plate 3 on which the hollow tube-type microorganism-mediated media 4 according to the present invention is installed is disassembled, and shows a fiber tube-type microorganism-mediated media 4. In the tube, a spring 11 having elasticity is built in the longitudinal direction so as to be able to flow in accordance with the flow of water, and in the lower surface thereof, an acid stool 7 is formed in which the air is bubbled up to rise vertically. Since the spring 11 has elasticity, when the flow velocity of the stream increases during the rainy season, the media 4 falls along the wave, and when the amount of water flows, the spring 11 may restore vertically. The acidic stone 7 serves as a support plate of the spring 11 in addition to a function of fine bubbles of air flowing from the lower surface. If the mountain stone 7 is not installed, it is not preferable because a large bubble is generated and the tube swings.

The media 4 of the fiber tube type are assembled in such a way that they are fitted to the hollow bolt 12 head 13 having an inner diameter of the lower surface thereof, for example, an outer diameter smaller than 5 cm in diameter. The screw portion 14 on the opposite side of the head 13 has a threaded line formed at its outer diameter and is fastened to the hole 6 formed in the air distribution plate 3. The inner diameter of the hole 6 is formed with a thread line 15 to facilitate the fastening with the bolt 12. In FIG. 4, reference numeral 16 denotes a clamp that tightens the air so that air does not leak when the lower surface of the media 4 is assembled to the head 13 of the bolt 12.

Hereinafter, the present invention will be described in more detail with reference to Examples.

Example

In this example, a reactor with a capacity of ³ m ³ (3 m × 1 m × 1 m) having a daily treatment capacity of about 15 m ³ of river water and a nominal residence time of about 2 hours was used. It was operated by placing an air distributor made of a PET material and installed with a hollow fiber tube type microorganism-mediated media of about 800 (diameter 5 cm, length 100 cm).

The operation was conducted for 50 days and the results of the river water treatment experiments were averaged in units of 10 days, and are shown in Table 1 below.

Experiment period 10 days 20 days 30 days 40 days 50 days inflow outflow % Removal inflow outflow % Removal inflow outflow % Removal inflow outflow % Removal inflow outflow % Removal BOD (mg / ℓ) 15 5 67 20 4 80 25 2 92 18 3 83 32 2 94 SS (mg / ℓ) 55 4 93 25 3 88 32 4 88 23 2 91 18 One 94 CODcr (mg / ℓ) 31 8 74 43 8 81 38 6 84 36 8 78 48 3 94 TKN (mg / ℓ) 8 3 63 10 3 70 13 2 85 10 3 70 8 2 75

Comparative example

In this comparative example, a reactor with a capacity of 3 m ³ (3 m × 1 m × 1 m) with a daily treatment capacity of river water of about 15 m ³ and a nominal residence time of about 2 hours was used. The gravel was used as a media and the fixed stationary phase (porosity: 50%) was placed and operated.

The operation was performed for 50 days, and the average result of the river water treatment experiment was shown in Table 2 below.

Experiment period 10 days 20 days 30 days 40 days 50 days inflow outflow % Removal inflow outflow % Removal inflow outflow % Removal inflow outflow % Removal inflow outflow % Removal BOD (mg / ℓ) 15 7 53 20 6 70 25 18 28 18 14 22 32 21 34 SS (mg / ℓ) 55 4 93 25 5 80 32 25 22 23 28 ** 18 35 ** CODcr (mg / ℓ) 31 10 68 43 8 81 38 28 26 36 32 11 48 43 10 TKN (mg / ℓ) 8 4 50 10 4 60 13 32 * 10 26 * 8 25 * * Higher water quality of the effluent than influent because microorganisms are detached or clogged. ** Due to thickening of the microbial membrane and dissolved oxygen not being delivered to the blocked substance, the rotten material is released.

According to Tables 1 and 2, the operating data for up to about 20 days showed no significant difference in treatment efficiency in both the Example and Comparative Example methods, but when the gravel media were used for filling (Comparative Example), the water quality was increased over time. In the case of suspended solids (SS), the concentration of effluent was higher than that of inflow due to the desorption of microorganisms, and as the microbial membrane became thicker, the pores were blocked and the oxygen in the water was not delivered. Because of the anaerobic state of the membrane, the concentration of effluent is higher than that of influent because of the elution of rotten material. On the other hand, in the case of the embodiment it was found that the processing efficiency of each item is higher as time passes.

In the conventional filling gravel media biofilm method, the porosity of the fixed phase media is low, causing microbial growth, which leads to clogging of the pores. In addition, the oxygen flow to the microbial membrane is not smooth, and the rotting material is formed in the anaerobic state. To be discharged.

However, in the tube-type media of the present invention, when the tubes are placed vertically and arranged in a zigzag form at predetermined intervals, clogging due to the microbial membrane does not occur at all because of the separation distance between the tubes. In addition, a hollow fiber type media is used, and oxygen is transferred to the microbial membrane outside the tube when air is supplied to the microorganisms in the hollow tube, thereby preventing desorption of adherent microorganisms, and a flexible spring inside the hollow tube. When the rainy season is laid down by a fast flow rate, but if the flow rate is slowed down by the restoring force, it can be used smoothly regardless of weather conditions without the problem of closing due to inflow of rainy season.

Claims (4)

Means (1, 2) for generating and filtering compressed air; A portion of the air of a predetermined pressure injected from the air generating means 1 passes through the inside in the form of fine bubbles, the upper surface thereof is sealed in a round shape, the lower surface thereof is open, and from the lower surface There is a built-in mountain stone (7) to fine-bubble the incoming air to rise vertically, the outer surface is composed of a fabric woven in a dense zig-zag in the vertical direction to which the microorganism 10 is attached Hollow fiber tube 4; And The hollow tube is provided with holes 6 so that the tubes 4 can be installed on the upper surface, and a plurality of pipes 5 are provided on the side to transfer a part of air of a predetermined pressure to another air distribution means 3. A stream purification apparatus using a tube-type microorganism-mediated media, characterized in that the air distribution means (3). 2. The stream purification process according to claim 1, characterized in that the hollow fiber tube (4) is provided with a spring (11) having elasticity therein so as to be able to flow according to the flow of water. Device. delete delete