KR100254922B1 - Microbial contact for disposing contaminated waste water and manufacturing method thereof - Google Patents

Abstract

PURPOSE: A microorganism contact media for treating sewage and wastewater is provided, which can treat sewage efficiently by increased microorganism attached to the contact media owing to the enlarged surface area caused by using twisted threads so that the thread is saved. The treatment efficiency is also high owing to little exfoliation of microorganism from the contact media. CONSTITUTION: The contact media comprises the followings: (i) a core part of polypropylene rope thread(1); (ii) multi-filament ring(2) of nylon BCF with 40-120 strands and Y-form sectional area of 300-1500 denier; and (iii) mono-filament ring(3) of nylon of 3-10 twisted threads, the multi-filament and mono-filament being mixed by ratio of 1:7-7:1, the direction of ring is formed at right angle to the direction of contact filter media.

Description

Wastewater Treatment Microbial Contact Materials and Manufacturing Method Thereof

The present invention relates to a microbial contact material for wastewater treatment and a method of manufacturing the same, and more particularly, to a wastewater treatment by a catalytic oxidation method in which a nylon BCF multifilament ring and a nylon monofilament ring are formed around a polypropylene rope yarn. The present invention relates to a microorganism contact material for treating wastewater and a method of manufacturing the same.

Generally, wastewater treatment methods such as domestic water, industrial wastewater, and livestock wastewater can be largely classified into physical treatment, chemical treatment, and biological treatment. The physical treatment method is a method of treatment by a physical action without any chemical reaction, and refers to a method of treatment using a screen bath, a settled paper, and the like. The chemical treatment method is a method mainly using a chemical reaction, and is a treatment method using a neutralization tank, oxidation, reduction reaction tank, flocculation tank, adsorption tower, and the like. The biological treatment method is a method of treating wastewater using microorganisms, and is a method of using a reaction facility such as activated sludge tank or activated sludge tank.

Among them, chemical treatment using chemicals causes another environmental pollution. Recently, biological treatment using microorganisms has been actively studied. The biological treatment method can decompose various organic materials and has an excellent treatment efficiency. Such biological treatment methods include activated sludge process and catalytic oxidation method. Catalytic oxidation method is a method of aeration of microorganisms in which microorganisms can be attached and grown in a microbial culture tank, and it has recently been in the spotlight due to its low sludge generation and simple facilities, and especially for low-cost and high-efficiency catalytic oxidation. Research is being done.

The microbial contact materials used in the catalytic oxidation method are classified into fluidized bed contactors and stationary bed contact materials according to the contact materials. The fluidized bed contact material is a molded article or activated carbon mainly manufactured by injection of plastics, and the manufacturing cost is low, but microbial adhesion is low, and thus wastewater treatment efficiency is extremely poor. The stationary phase contact material is mainly manufactured by processing the fiber filament, and the amount of microorganisms attached is advantageous in terms of processing efficiency, whereas the manufacturing cost is high and the microorganisms are excessively attached, causing the blockage to occur and anaerobic inside. Microorganisms are detached and have a disadvantage of lowering treatment efficiency. The stationary contact material is divided into a plate shape and a rope shape according to its shape.

Korean Patent Publication No. 90-2340 is composed of a plurality of non-combustible connecting yarns arranged in a direction inclined to the peripheral inclined direction of a core wire such as aluminum alloy and polyvinylidene chloride monofilaments of 100 to 200 denier. Disclosed is a contact treatment material for water treatment, which is drawn between the winding portions of a and forms an independent ring in a non-bonded state radially outward of the core wire with each filament.

However, since these contact materials use thick 100 to 200 denier monofilaments as fibers, the surface area is much smaller than that of multi-filament of several deniers, and thus it is difficult to attach a sufficient amount of microorganisms, thereby increasing the amount of wastewater to be purified. There is a problem of using a contact material. In addition, the equipment for manufacturing such a contact material is used by transforming the loom, which uses only 16 ring-forming filaments and 16 ring-fixing filaments to form only 8 ring shapes, so the size of the facility is increased In order to form a ring shape, the chimp pins are moved up and down at regular time intervals, and thus a lot of time is required, resulting in a low productivity per facility, thereby increasing manufacturing costs.

One object of the present invention is to overcome the problems of the prior art as described above, microorganism contact material for wastewater treatment and its manufacturing method that the surface area is wide and the microorganisms are attached to a large amount in a short time, the porosity is large, so that no obstruction occurs To provide.

Another object of the present invention is to provide a microbial contact material for wastewater treatment and a method for producing the same, which show high treatment efficiency because the proliferated microorganisms are not detached.

1 is a longitudinal sectional schematic view of a conventional microbial contact material for wastewater treatment.

2 is a longitudinal sectional schematic view of the microbial contact material for wastewater treatment of the present invention.

Figure 3 is an electron micrograph of the cross section of BCF yarn used in the manufacture of the microbial contact material for wastewater treatment of the present invention.

Figure 4 is an electron micrograph of BCF company used in the manufacture of the microbial contact material for wastewater treatment of the present invention.

5 is a schematic diagram of a microbial contact material for wastewater treatment of the present invention.

* Explanation of symbols for main parts of the drawings

1: polypropylene rope yarn 2: nylon BCF multifilament ring

3: nylon monofilament plywood ring 4: polypropylene multifilament

The above-mentioned object is the microorganism for treating water of the present invention, which is formed by mixing a nylon BCF multifilament ring and a nylon monofilament ring in a ratio of 1: 7 to 7: 1 around a polypropylene rope thread as a core part. Is achieved by the contact material.

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

The shape of the microbial contact material for wastewater treatment of the present invention is the same as the schematic diagram of FIG. That is, in the microbial contact material for wastewater treatment of the present invention, the nylon BCF multifilament 2 and the nylon monofilament braided yarn 3 are twisted in a ring shape around the polypropylene rope yarn 1 wound around the core 5. And a polypropylene multifilament 4 is wound around it to fix it. When the microbial contact agent for wastewater treatment of the present invention is provided in a biological treatment tank with a predetermined length, it is purified by the action of microorganisms that adhere to and grow on this contact material.

In the present invention, in order to produce a rope-type fixed-phase microbial contact material for wastewater treatment while increasing the surface area of the contact material with high porosity, nylon BCF multifilament and nylon monofilament plywood as a ring forming fiber ratio of 7: 1 to 1: 7 It was used by mixing. The reason for using two kinds of filaments as the material of the ring in the present invention is as follows. In order for the microorganism to adhere well to the surface of the microbial contact material for wastewater treatment, firstly, the charge on the surface of the microbial contact material must be a cation, and secondly, the surface must be very bent and rough so that the microorganism can enter between the bends. The most suitable fiber for these conditions is the nylon BCF filament, since the fiber has a cation due to the terminal amine group, which is suitable for microbial attachment. In addition, in the conventional rope-shaped fixed-phase microbial contact material, the fiber of the ring has a circular cross section, which is not suitable for the attachment of microorganisms, whereas the nylon BCF filaments used in the present invention are as shown in FIGS. 3 and 4. Its Y-shaped cross section is bulky and has a lot of curves and has a surface structure suitable for attachment of microorganisms.

The biggest problem that occurs when sewage is treated by using rope-type fixed bed microbial contact material manufactured by circular cross-section fiber is desorption phenomenon of sludge attached to the contact material. Increased demand and suspended solids lead to reduced wastewater purification capacity. This desorption phenomenon is mainly caused by the impact of the flow of sewage and air bubbles, the microorganisms attached to the conventional circular cross-section fibers are directly impacted and the desorption phenomenon is increased, while the Microorganisms attached to the inside of Y-shaped fibers, such as nylon BCF filaments, can be protected from the impact of this flow.

The nylon BCF filament constituting the microbial contact material for treating wastewater of the present invention is a multifilament of 300 to 1,500 denia, and the number of strands thereof is preferably 40 to 120 strands. Nylon BCF filaments are preferably within this range because they maintain the most stable Y-shaped cross section between 300 and 1500 denier. On the other hand, in the case of exceeding 1500 denia, when the microbial contact material is manufactured by BCF company, the volume becomes too large, resulting in blockage and blockage of air inside the contact material due to excessive adhesion of microorganisms. Problems arise that are too thin to be easily rejected.

If the number of strands of the nylon BCF multifilament is less than 40, the number of strands is too small to reduce the amount of microbial adhesion, thereby reducing the wastewater treatment efficiency. On the contrary, when the number of strands of the nylon BCF multifilament exceeds 120, the microorganisms are excessively attached and the flow of the mixed solution And the problem that the oxygen movement may be disturbed.

On the other hand, while nylon BCF multifilament has a wide surface area and the surface structure has the advantage that is suitable for microbial attachment, it is difficult to use alone as a rope-type stationary contact material. In other words, when nylon BCF multifilament is used alone, the thickness of single yarn is thin and there is no strength, so it does not maintain its shape in water and sags downward. As a result, microorganisms are attached, which causes occlusion phenomenon and oxygen transfer inside. Corruption occurs. Moreover, as the date passes, not only the treatment efficiency is lowered, but also the side effect of the microorganisms being detached increases the amount of solids in the treated water. Therefore, in the present invention, a nylon monofilament having a high tensile strength and excellent circular recovery of form is used together with the BCF filament as a method for preventing the blockage phenomenon.

In the present invention, the ratio between the nylon monofilament ring and the nylon BCF multifilament ring is preferably 1: 7 to 7: 1. The nylon monofilament used at this time is suitable for the 100 to 300 denier, it is good to use a 10 ply in three plywood. When using nylon of more than 300 denier monofilament, the surface area is reduced to decrease the microbial adhesion ability, on the contrary, if less than 100 denier, the phenomenon occurs after the microorganisms adhere to sagging phenomenon occurs.

Using monofilament alone without monofilament between three to ten ply yarns is not economical due to the long manufacturing time and is not preferable because of the weak force that prevents the microorganism-attached nylon BCF multifilament from sagging down. . If it is less than 3 plywood, it will not be able to support the BCF firmly. If it is more than 10 plywood, it will be too tightly attached to the BCF, causing problems in porosity.

Nylon monofilament has a higher tensile strength and excellent form retention than polyvinylidene chloride monofilament, which can form a large ring shape compared to polyvinylidene chloride monofilament, which is 100 mm compared to the existing invention having a diameter of 25 to 30 mm. Even if a ring shape is formed in diameter, there is an advantage that clogging does not occur inside.

In the conventional rope-type fixed bed contact material, as shown in FIG. 1, the direction of the ring is in the length direction of the contact material. In this case, the contact material is fixed in the vertical direction of the aeration tank, and the flow of sewage is in the direction of the contact material installation direction. Since it is made in a right direction, the microorganisms attached to the contact material are severely detached due to the impact of the sewage flow. As such, when the microorganisms are detached, a large amount of contact must be used to clean the wastewater, thereby increasing the treatment cost.

As can be seen from FIG. 2, the present invention manufactures the shape of the ring perpendicular to the longitudinal direction of the contact material in order to solve this problem. This prevents the detachment phenomenon because the flow direction of the sewage is horizontal with the ring.

Another aspect of the present invention is to provide a method for producing an economical and productive wastewater treatment microorganism contact material capable of producing high quality wastewater treatment microorganism contact materials. When manufacturing the microbial contact material for wastewater treatment according to the present invention, 8 bobbins wound with nylon BCF multifilament and nylon monofilament and 8 bobbins wound with polypropylene multifilament to be used as a ring fixing chamber are mounted on the bobbin moving guide. Each bobbin moving guide is mounted in 16 cylindrical grooves connected to each other. When the machine is operated, each bobbin crosses each other along the groove of the guide and rotates in the opposite direction. This rotation causes each filament to twist continuously around the polypropylene rope yarn. At this time, in the method of the present invention, the nylon BCF multifilament and the nylon monofilament are formed using a stationary bed needle to form a ring perpendicular to the length direction of the microbial contact material. That is, a fixed-phase needle is installed at the center of eight cylindrical grooves at intervals of two of the sixteen cylindrical grooves, and is positioned at a constant distance in eight directions around the polypropylene rope yarn whose end is wick, and then forms a ring shape among the rotating bobbins. The bobbin rotates to the outside of the needle so that each filament is caught by the needle and moves toward the rope thread. When it reaches a certain length, the bobbin is pulled out of the needle to form a ring shape and the polypropylene multifilament used to fix it is always inside the needle. It rotates to fix the ring shape formed. This method raises only the filament forming a ring shape by raising the needle up at regular time intervals, and then moves downwards after a certain time so that the ring is pulled out, compared to the conventional method of manufacturing microbial contact materials for wastewater treatment. As well as its diameter has the advantage of being adjustable freely. In this way, the polypropylene rope yarn wound with the annular nylon monofilament is discharged to the outside by an automatic discharge device installed above.

As described above, the rope-type fixed-phase contact material manufactured by the present invention has superior microbial adhesion ability than the contact material prepared by the conventional method, and can maintain its initial shape even when the diameter is increased, so that no clogging phenomenon occurs and thus the treatment capacity is not improved. great. This has an economical advantage because less microbial contact materials are consumed for the same volume of wastewater treatment.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the following Examples are only for the purpose of explanation and should not be construed as limiting the protection scope of the present invention.

Example 1

To evaluate the microbial adhesion of the microbial contact material for wastewater treatment according to the material and thickness of the fiber, 120 denier polyvinylidene chloride monofilament, 900 denia 42 filament nylon BCF multifilament, 420 denia 48 filament nylon multifilament, 150 denia Nylon monofilament was tied to the wire at regular intervals and placed in a beaker containing filthy water, followed by aeration to allow microorganisms to adhere to the fiber surface. In this process, wastewater was introduced for three days at regular time intervals to increase the adhesion of microorganisms. The amount of microorganisms attached was measured by dry weight and the results are shown in Table 1 below.

TABLE 1

As confirmed through Table 1, the amount of microorganisms attached to the nylon BCF multifilament was 3.2 times higher than that of the nylon monofilament and 4.4 times higher than that of polyvinylidene chloride.

Example 2

In order to evaluate the attachment state and detachment state of the microorganism according to the formation direction of the ring, the microbial contact material was arranged so that the ring was arranged perpendicular to the longitudinal direction of the microbial contact material according to the present invention using nylon BCF multifilament and nylon monofilament. Prepared and installed in a 20 liter continuous aeration tank to 50% of the total volume and while treating the sewage of the apartment 60 days while observing the treatment efficiency and microbial state, the results are shown in Table 2 below.

Comparative Example 1

Except that the microbial contact material was prepared so that the ring is arranged in the same direction as the longitudinal direction of the microbial contact material according to the prior art, it was carried out in the same manner as in Example 2 and the results are shown together in Table 2 below.

TABLE 2

As can be seen from Table 2, when the ring of the microbial contact material is manufactured in the same direction as the length direction of the contact material, while the desorption phenomenon starts to occur after 35 days after the treatment, the ring as in the present invention In the case where V was prepared in a direction perpendicular to the longitudinal direction of the contact material, no detachment phenomenon occurred for 60 days. Comparing the BOD of the treated water, there was no difference in the initial 30 days, but as the desorption phenomenon started to occur, the BOD increased in the desorbed side.

The microbial contact material for wastewater treatment according to the present invention uses a combination of nylon BCF multifilament and nylon monofilament as a ring material, so that the surface area is enlarged, so that the amount of microorganisms is high and the treatment capacity is excellent, and the amount of yarn used for the microbial contact material is increased. As it can be reduced, it is economical and there is less desorption of microorganisms, which has the advantage of high wastewater treatment efficiency.

The manufacturing method of the microbial contact material for wastewater treatment according to the present invention has an advantage that the manufacturing cost is lower than that of the conventional microbial contact material, and the initial shape can be maintained even if the diameter of the ring is increased, so that no clogging phenomenon occurs.

Claims (3)

Nylon BCF multifilament rings and nylon monofilament rings having a diameter of 300 to 1,500 deniers and 40 to 120 strands are mixed at a ratio of 1: 7 to 7: 1 around the polypropylene rope yarn serving as the core, A microbial contact material for wastewater treatment, characterized in that it is formed perpendicular to the longitudinal direction of the contact material. The microorganism contact material for wastewater treatment according to claim 1, wherein the nylon monofilament is manufactured by 3 to 10 ply yarns as 100 to 300 deniers. The machine is operated by mounting 8 bobbins wound with nylon BCF multifilament and nylon monofilament and 8 bobbins wound with polypropylene multiplyment to be used as ring fixing thread in 16 cylindrical grooves with bobbin moving guides. By intersecting each other along the groove of each other and rotating in the opposite direction, each filament is twisted around the polypropylene rope yarn to manufacture microbial contact material for wastewater treatment, but the middle of eight cylindrical grooves at two intervals of 16 cylindrical grooves After the fixed needle is installed on the end of the polypropylene rope, the end of which is positioned at a constant distance in 8 directions, the bobbin which forms a ring shape among the rotating bobbins rotates to the outside of the needle so that each filament is caught by the needle. Move towards the rope thread and when it reaches a certain length The polypropylene multifilament used to form and fix the ring shape is always rotated to the inside of the needle so as to fix the formed ring shape to form a ring in a direction perpendicular to the longitudinal direction of the contact material. Method for producing microbial contact material for treatment.

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