KR20030075811A - Novel Bio-Media with improved specific surface area, bio-affinity and water-fluidization - Google Patents

Abstract

PURPOSE: Provided is a biofilm media prepared by attaching ceramic powder or ceramic grains to the surface of synthetic fiber having high biocompatibility, overlapping the ceramic attached synthetic fibers, and inserting the overlapped synthetic fibers in a synthetic resin mesh casing. CONSTITUTION: The media(1) comprises synthetic fiber fabric with high biocompatibility, ceramic power or ceramic grain layer attached onto the surface of the synthetic fiber fabric, and a synthetic resin mesh casing(2a,2b) holding the ceramic attached synthetic fiber fabrics therein.

Description

Biofilm carrier with improved specific surface area, bio-affinity and water-fluidization

The present invention relates to a biofilm carrier filled in a microbial culture tank for producing food or pharmaceuticals or treating wastewater, and in particular, installed in a fluidized bed biofilm carrier with improved specific surface area and biocompatibility and fluidity and improved durability and easy installation. The method relates to an improved stationary biofilm carrier.

Materials of various materials are processed into biofilm carriers with a large specific surface area, and among them, synthetic resins are sponge-like microbial carriers made of foamed resins processed to communicate with fibrous and bubbles processed in the form of cilia or scrubbers. It is used a lot.

However, the conventional method of installing the fibrous form is difficult to process, install and expand because the fixed phase is installed in the reaction tank by inserting a round rod into the mounting hole formed by folding and sealing the end of the plate-like fibrous carrier. Inhibit or act as an obstacle to the repair of the internal device, in particular, when the microorganisms adhered to the increased self-weight, the carrier in contact with the round bar is destroyed, there was a serious problem in durability.

Although the sponge-like carrier has its own strength and durability, it is not easily worn because it is cut into a cube of small size and put into the reaction tank, and it is not easily worn as it flows toward the outlet side of the reaction tank according to the flow of the reaction solution. to be. In the reaction tank filled with a sponge carrier, the carrier is forcedly circulated by the air-lift pump so that the carrier is evenly distributed. Therefore, excessive power is required and the wear rate is increased in the mechanical circulation process. Linpor Process is an example.

The fluidized bed biofilm carrier developed and commercialized by the applicant to improve these problems is to construct a biofilm carrier by inserting a fibrous microbial contact material having a large specific surface area and a large porosity into a rigid mesh-like synthetic resin case, and it does not float above the water surface in the reactor. In order to flow smoothly, a ceramic having a large specific gravity was inserted therein so that the weighted average specific gravity of the assembled biofilm carrier was similar to that of the reaction solution.

The fluidized bed biofilm carrier smoothly flows in the reaction tank and has many advantages in the growth of the biofilm. However, in order to control specific gravity, ceramics in the form of agglomerate having a small specific surface area are embedded in the carrier so that the ceramic itself does not contribute much to the provision of effective voids and surface areas where microorganisms can attach and multiply. This resulted in a loss in which the capacity of the reactor corresponding to the amount of ceramic insertion was reduced. As a solution for this, a method of spinning or injecting a synthetic resin mixed with semamic powder may also be considered to allow the semamic powder to be mixed into the fiber or the casing. When the powder is mixed, the shear and tensile strength are weakened, so that it is easily broken, and the case in which the ceramic is mixed collides with another external carrier or the wall of the reaction tank, and thus easily breaks or wears.

Accordingly, the present invention has been made to solve the above-mentioned problems, the object of the present invention is to provide a fixed bed biofilm carrier with improved specific surface area and biocompatibility, improved specific gravity, and improved durability and installation method It is done.

Fluidized biofilm carrier according to the present invention for achieving the above object is a non-toxic and preferably biocompatible, the surface of the synthetic resin fiber yarns coated with semamic powder or granular ceramics, and the surface area and porosity is large It is composed of interwoven fibrous microbial contact materials composed of woven or overlapping materials in a sturdy networked synthetic resin case.

Here, since the ceramic is granular in the form of powder or irregular shape, the specific surface area is very large compared to the lump form, so when the surface is attached to the surface of the synthetic resin, the surface of the synthetic resin is irregularly formed and roughened, so the specific surface area is increased and the ceramic The properties not only improve the biocompatibility of the fibrous microbial contact material but also increase the specific gravity.

The fibrous microbial contact material is a multi-fiber made by twisting a plurality of yarns in a woven fiber form in which a plurality of yarns, woven fabrics, non-woven fabrics, scrubbers and cilia are formed, or a plurality of yarns interwoven with multiple hollow yarns. It can be configured in various ways. In the case where the nonwoven fabric is formed by overlapping a plurality of layers, a gap material such as a straw may be inserted between the nonwoven fabric and the nonwoven fabric so that water flow and bubbles can pass smoothly and the biofilm adheres and grows.

In addition, a method of forming a fibrous microbial contact material first with a synthetic resin and then applying or attaching a ceramic to the surface of the synthetic resin constituting the fibrous microbial contact material is naturally included in the scope of the present invention.

In order to smoothly flow the biofilm carrier after assembly, the specific gravity thereof is preferably similar to the specific gravity of the reaction solution. Therefore, if the specific gravity and the adhesion amount of the ceramic attached to the fibrous microorganism contacting material are adjusted, each material after the assembly is completed By weight and volume of the weighted average wet weight can be controlled similarly to the reaction solution.

The case of the mesh is not limited in the form of a cylinder, a polygon, a cube, etc., but a spherical shape is preferable in terms of fluidity and abrasion resistance due to collision.

In addition, in order to solve the problem of the conventional sponge-like microbial contact material, in the present invention, by mixing the ceramic powder or granular ceramic in a non-toxic and high biocompatibility synthetic foam to foam the pores to communicate with each other, the specific surface area and porosity is large Sponge-shaped microbial contact material with increased specific gravity can be constructed as a biofilm carrier by interpolating into a rigid mesh-like synthetic resin case, and controlling its specific gravity so as to flow smoothly in a reaction tank, by controlling the specific gravity and mixing amount of ceramics. Specific gravity of the carrier after the assembly was adjusted.

The fluidized bed biofilm carrier by the sponge-like microbial contact material according to the present invention is less durable because the sponge-like microbial contact material is protected in a solid case and the number of sponge-like microbial contact material of the small size filled in the case When the microbial contact material is not anaerobic, the microorganism contact material also increases the size and fluidity of the carrier, thereby eliminating the problem of the linpor process that must be forced to circulate internally by an air lift pump. Since the sponge phase is entangled with each other in various directions, unlike the fine fibers, even if the semamic powder is mixed therein, it is not easily broken or broken.

It is also included in the scope of the present invention to adhere ceramic powders or granular ceramics to the surface of the loofah-like biofilm contact material having been foamed.

In addition, the present invention has devised a method for easily adjusting the specific gravity of the biofilm carrier without adding a ceramic. The fibrous microbial contact material composed of non-toxic and biocompatible synthetic fiber yarns is interpolated into a rigid networked synthetic resin case and assembled into a biofilm carrier, wherein the biofilm carrier is smoothly flowed in a reaction tank in the synthetic resin yarn or the synthetic resin case. If one is composed of a material such as polyurethane, PVC, PVDC with a high specific gravity, the other is composed of PE, PP, Nylon, etc. with a small specific gravity, it can flow smoothly in the reactor after the assembly is completed. The weighted average specific gravity of the carrier so assembled can be easily adjusted to a specific gravity similar to the reaction solution.

This method can be naturally applied to sponge-like microbial contact materials. The non-toxic and biocompatible synthetic resin is assembled into a biofilm carrier by inserting a sponge-like microbial contact material into a rigid network-like synthetic resin case in which foams are communicated with each other. However, the biofilm carrier is composed of one of the sponge-like microbial contact material and the synthetic resin case made of a large specific gravity polyurethane, PVC, PVDC and the like, so that the biofilm carrier can flow smoothly in the reaction tank, the other specific gravity When composed of a small PE, PP, Nylon, etc., the weighted average specific gravity of the carrier is assembled can be easily adjusted to flow well in water.

In order to improve the durability of the conventional fixed phase and the cumbersome installation and expansion method, the present invention uses various types of fibrous microbial contact materials composed by weaving or superimposing non-toxic and biocompatible synthetic fiber yarns into a shape having a large surface area and porosity. And housed in a sturdy mesh-like synthetic resin case provided with an assembly means for storing the inside and fixing it so as not to be separated and a stationary carrier having completed assembly to be installed at a predetermined position in the reaction tank, and the microorganism contact material is The carrier unit was fixed by the assembly means so as not to be separated out of the case, and the stationary phase was installed by the fixing means provided in the case to install the carrier unit at a predetermined position inside the reactor.

Specific method for installing the fixed phase biofilm carrier is, by fixing the one or more carrier units to the elongated circular or rectangular structural member using the fixing means provided in the carrier unit, the structural member is provided with a scaffold or suspension Even without pumping the reaction liquid in the reactor, it was allowed to stand at the bottom of the reactor or suspended at the top of the reactor so that it could be installed at a constant position in the reactor.

In addition, in the present invention, the microbial contact material accommodated in the case constituting the fixed-phase biofilm carrier is non-toxic, and a sponge-like microorganism contact having a high biocompatibility so as to foam the pores to communicate with each other to increase specific surface area and porosity. Ash may be applied, and the surface of the microbial contact material may be coated or adhered with ceramic powder to increase specific surface area and improve biocompatibility.

In addition, the specific surface area of the fiber constituting the fibrous microorganism contact material may be increased by forming a thin, narrow and long ribbon-shaped fiber rather than a circular cross section. In particular, when the ribbon-like fibers are twisted in a spiral configuration, the specific surface area can be further increased, and the surface area on which microorganisms can grow can be significantly increased.

1 is a conceptual diagram of a fluidized bed biofilm carrier according to the present invention;

2 is a conceptual diagram of a stationary carrier unit according to the present invention;

3 is a perspective view of a stationary phase carrier unit according to the present invention;

4 is a cross-sectional view of the stationary biofilm carrier according to the present invention.

-Explanation of symbols for the main parts of the drawings-

1: microbial contact material 2, 2a, 2b: case

3a, 3b: assembly means 4: fixing means

5: suspension stand 6: scaffolding

7: round bar 10: stationary phase carrier unit

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

1 is a schematic view of a fluidized bed biofilm carrier according to the present invention, which is a cross-sectional view of a carrier in which a microbial contact material 1 is inserted into the reticulated case 2.

Here, the microbial contact material is a fibrous form in which the semamic powder is applied or granular ceramic is attached to the surface thereof, or the sponge is mixed with the ceramic therein, and the case is solid and has a good flow of water and bubbles inside. It is a mesh-shaped synthetic resin case, and if the shape is a mesh and can be smoothly flow is not limited in its form, but the spherical case is preferable for smooth flow.

The microorganism contact material is made of a material such as polyurethane, PVC, PVDC having a high specific gravity without attaching or mixing ceramics, and the case is composed of PE, PP, Nylon, etc. having a low specific gravity. Similar adjustments are possible. Of course, the specific gravity of the microbial contact material may be reduced and the specific gravity of the case may be made of a large material to adjust the specific gravity.

2 is a cross-sectional view of a fixed-phase biofilm carrier according to the present invention, which includes assembling means (3a, 3b) for fixing a fibrous or sponge-like microbial contact material (1) therein and a fixing means provided in the reaction tank ( 4) is provided in a rigid mesh-like synthetic resin case (2a, 2b) is provided, and the fixed-phase carrier configured by fixing by the assembly means so that the microbial contact material does not escape to the outside of the case. By heat fusion, the assembly means can be fixed or the two cases can be combined, but in the most general method, the process is cumbersome and requires additional cost.

FIG. 2A relates to an embodiment in which the microbial contact material 1 is inserted into a plate-shaped case 2a made of a mesh and fixed by a pin-shaped fastening means 3a. Fig. 2B is a plate-shaped mesh, and the pin-shaped fixing means 3b inserts the microbial contact material 1 into the case 2b in which it protrudes and rotates the case 2b of the same shape by 180 °. The present invention relates to an embodiment in which each other is coupled to and coupled to each other. According to the embodiment of Figure 2B can be accommodated so that the microbial carrier is firmly protected on both sides by the case injected from one mold, easy to assemble, save the mold production cost and does not require any separate parts As it is a case, inventory management becomes easy, too.

The microbial contact material constituting the fixed-phase biofilm carrier may be used without limitation in any material and form as long as it is advantageous for adhesion growth of microorganisms such as a loofah, sponge, or porous ceramic, and the fibrous microbial contact material may be a woven or nonwoven fabric. Also included is a ciliated phase in which synthetic resin fibers protrude on one or both sides to form a ciliated layer.

It is possible to increase the specific surface area and improve biocompatibility by applying ceramic powder on the surface of a scouring pad or sponge phase, and in this case, since it is a fixed phase, the adhesion of ceramic is irrelevant to specific gravity control for flow.

Fig. 3 is a perspective view showing the overall shape of the stationary carrier unit shown in Fig. 2B.

4 is a cross-sectional view showing a method for installing a fixed-phase biofilm carrier according to the present invention, wherein at least one carrier unit 10 is fixed to a structural member such as an elongated round rod 7 using fixing means 4, and the structural member It is shown that the scaffold 6 is provided to be installed on the bottom of the reaction tank without pumping the reaction liquid, and the suspension stand 5 is provided to be suspended from the upper part of the reaction tank and installed at a constant position inside the reaction tank.

In the fixed-phase biofilm carrier according to the present invention described above, the case is not limited to the form as in the above embodiment, and if the flow of the reaction solution and storage of the microbial contact material are easy, the form is not limited. Any structure that can be combined with the structural material can be used without limitation.

The fluidized bed biofilm carrier having a specific surface area and biocompatibility according to the present invention having a large specific gravity and improved fluidity can be easily installed and expanded in a reaction tank and can grow a large amount of microorganisms, resulting in excellent reaction efficiency and durability. The fixed-phase biofilm carrier, which has been increased and is easy to install and assemble, is semi-permanent in life and can be used for biological wastewater treatment as well as various applications as a deodorizing tower, an absorption tower, or a cleaning tower filler to remove harmful gases.

Claims (9)

By applying ceramic powder on the surface or by attaching granular ceramic, the biocompatibility, specific surface area and specific gravity are increased, and the fiber-like microbial contact material composed of various shapes is made by synthetic resins woven or superimposed to have a large surface area and porosity. The biofilm carrier is assembled into a biofilm carrier by interpolating into a synthetic synthetic resin case, and the assembly of the biofilm carrier is controlled by controlling the specific gravity and the amount of ceramic applied or attached to the surface of the fibrous microbial contact material so that the biofilm carrier can be smoothly flowed in the reaction tank. Biofilm carrier, characterized in that the controlled fluidized bed. Weaving or superposing non-toxic synthetic fiber fibers into a shape having a large surface area and porosity to assemble the fibrous microbial contact material having various shapes into a biofilm carrier by inserting them into a rigid network-like synthetic resin case, wherein any one of the synthetic resin yarn or the synthetic resin case One is composed of materials such as polyurethane, PVC, PVDC, which has a high specific gravity, and the other is composed of PE, PP, Nylon, etc., which has a low specific gravity, and the weighted average of the carrier assembled by adjusting the specific gravity and composition ratio of different materials. Biofilm carrier, characterized in that the specific gravity is a fluidized bed controlled to flow smoothly in the reaction tank. Non-toxic synthetic resin with increased specific gravity by mixing ceramic powder or granular ceramic is foamed so that the pores communicate with each other, and the sponge-like microbial contact material with increased specific surface area and porosity is interpolated into a rigid mesh-like synthetic resin case and assembled into a biofilm carrier. However, the assembly of the biofilm carrier is a biofilm carrier, characterized in that the fluidized bed is controlled by adjusting the specific gravity and the amount of the ceramic mixed in the synthetic resin to be smoothly flow in the reaction tank. The non-toxic synthetic resin is foamed so that the pores communicate with each other, and the sponge-shaped microbial contact material, which has increased specific surface area and porosity, is interposed into a rigid mesh-like synthetic resin case, and assembled into a biofilm carrier, wherein the sponge-shaped microbial contact material or the synthetic resin case One of them is composed of materials such as polyurethane, PVC, PVDC, which has a high specific gravity, and the other is composed of PE, PP, Nylon, etc. having a specific gravity, and controls the specific gravity and composition ratio of different materials. Biofilm carrier, characterized in that the weighted average specific gravity is a fluidized bed controlled to flow smoothly in the reactor. A fibrous microbial contact material of various shapes composed by weaving or superposing non-toxic synthetic fiber fibers into a shape having a large surface area and a large porosity is housed inside a rigid networked synthetic resin case equipped with an assembly means and a fixing means, and the microbial contact material is the case A biofilm carrier, characterized in that the carrier unit is fixed to the assembly means so as not to be separated from the outside, and the carrier unit is a fixed phase installed at a predetermined position in the reaction tank by the fixing means provided in the case. 6. The biofilm carrier according to claim 5, wherein a surface of the synthetic resin is coated with semamic powder or adhered to a granular ceramic to increase the specific surface area and biocompatibility. 6. The biofilm carrier according to claim 5, wherein the fibrous microbial contact material is a stationary phase made of a ciliated fibrous microbial contact material formed by protruding a large number of cilia on the surface of a woven or nonwoven fabric. 6. The biofilm carrier according to claim 5, wherein the microbial contact material contained in the case is a sponge-like microbial contact material which foams non-toxic synthetic resin so that the pores communicate with each other, thereby increasing the specific surface area and the porosity. The method of claim 5, wherein at least one carrier unit is fixed to the structural member in the form of a round rod using the fixing means, and the structural member is provided with a scaffold or a suspension stand at the bottom of the reactor or installed by suspending it at the top of the reactor. Biofilm carrier, characterized in that the stationary phase.