KR0182656B1 - Method of manufacturing micro-organism contact filtration agent - Google Patents

Abstract

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for producing a microorganism contact filter which can grow without anaerobic and aerobic microorganisms sticking to both sides including the inside of a member by forming many voids with a fibrous material whose surface and inner surface are frozen. It is.

Another object of the present invention is to provide a method for producing a microbial contact filter which is simple in manufacture and has a long strength and thus has a long lifetime since it is composed of a single material.

Method for producing a filter medium of the present invention for achieving the above object is a step of melting polypropylene (PP) waste, such as grain sacks at 180 ℃ to 300 ℃ to form a lump to cool; Crushing the molten waste polypropylene mass to a diameter of 2 to 15 mm; Inserting the shredder into a screw extruder, applying heat to a heating device, and extruding the outlet temperature at 45 ° C. to 55 ° C. while heating and pushing out the initial temperature to 200 ° C. to 300 ° C .; Molding the extrudate under the exit temperature condition to have a desired cross-sectional shape by passing a molding die; A withdrawal process of forming a porous fibrous structure by pulling the molded product passing through the molding die in a conveying direction; And a cutting step of cutting the continuously drawn molding to a predetermined length.

Description

Manufacturing method of microorganism contact filter for sewage treatment

1 is a view showing a microbial contact filter for wastewater purification treatment according to the present invention.

2 is a view showing a molding process in a screw extruder.

3 is a view showing a molding die.

4 is a view showing a take-out roller of the molding.

* Explanation of symbols for main parts of the drawings

1: filter medium 2: fibrous structure

3: space part 4: crushed material

5: extruder 6: hopper

7 screw 8 heating device

9: cooling device 10: molding mold

11,11 ': Drawer roller

[Industrial use]

The present invention relates to a method for producing a microbial contact filter for waste water purification treatment.

[Private Technology]

As a microbial contact filter for providing a living space of aerobic and anaerobic microorganisms and decomposing and purifying various organic matters, there is an invention disclosed in Korean Patent Publication No. 95-2547.

According to the patent publication, waste synthetic resins such as waste vinyl (PE) are used as the main material, mixed with the raw materials such as stone powder, activated carbon, and filtered sand at a predetermined ratio, and then melted at a high temperature to carbonize impurities and immediately after C is carbonized. The present invention is directed to forming a microbial contact filter by extrusion cooling to have a mold cross section.

According to the above invention, as the subsidiary material swells during extrusion molding, the surface of the filter medium is unevenly formed, so that the surface area is increased and surface cracks are formed to facilitate the adsorption and growth of microorganisms.

However, the filter agent according to the above invention has improved surface morphology of the filter medium for microbial growth conditions as compared to yogurt bottles, plastic bottles, and various filter agents used in the related art.

First, since the main material is waste vinyl (PE) and melted at high temperature (200 ℃ ~ 250 ℃) and then extruded immediately, PE application forms agglomerates, and no pores are formed in the tissue during final extrusion. However, because PE melts and spreads, microorganisms easily stick to each other, forming too smoothly to form a layer, so there is a problem that there is insufficient space for anaerobic microorganisms to grow, and the microbial layer is easily detached. When the mixture is melted and extruded, it helps to crack the surface of the filter, but on the contrary, it is brittle and has a problem of being easily broken due to its brittleness. In addition, it has to be manufactured by using various members. It is too late to significantly reduce the productivity of the filter This is being pointed out.

Problems to be Solved by the Invention

Accordingly, the present invention has been proposed in view of the above problems, and its purpose is to form a large number of pores of the fibrous material of the surface and the inner surface, so that the anaerobic and aerobic microorganisms are well attached to both sides including the inside of the member. To provide a method for producing a microbial contact filter that can be grown without.

Another object of the present invention is to provide a method for producing a microbial contact filter which is simple in manufacture and has a long strength and thus has a long lifetime since it is composed of a single material.

[Means for solving the problem]

Method for producing a microbial contact filter of the present invention for achieving the above object comprises the steps of melting polypropylene (PP) waste such as grain sacks at 180 ℃ to 300 ℃ to form agglomeration and cooling; Crushing the molten waste polypropylene mass to a diameter of 2 to 15 mm; Inserting the crushed material into a screw extruder and extruding the outlet temperature at 45 ° C. to 55 ° C. while heating and pushing out the initial temperature at 200 ° C. to 300 ° C .; Molding the extrudate under the exit temperature condition to have a desired cross-sectional shape by passing a molding die; A withdrawal step of forming a porous fibrous structure by pulling out the molded product passing through the molding die in a conveying direction; And a cutting process of cutting the continuously drawn molding to a predetermined length.

EXAMPLE

Hereinafter, examples of the manufacturing method according to the present invention will be described.

1 is a view showing a microbial contact filter prepared by the manufacturing method according to the present invention (photo), the cross-sectional shape of the filter (1) is a shape having internal and external spaces that microorganisms such as V, U, C type can contact The back face is short and the fibrous tissue 2 stretches along the length direction, and many voids 3 are formed between the tissues.

A feature of the present invention is that the polypropylene has been used for the purchase, distribution and storage of grains in farms other than the conventional PE material, which is a material capable of satisfying such a coarse and highly porous filter material. PP) material is used for the waste grain sack.

PP for waste grains is made of thin material, so it is difficult to break, so it melts at 180 ℃ ~ 300 ℃ to form agglomerates and then naturally cools for 2-3 days. When the mass is completely cooled, it is put into a crusher and pulverized to a size of 2 mm to 15 mm in diameter.

The crushed material 4 is introduced into the hopper 6 of the screw extruder 5 as shown in FIG. 2 to rotate and extrude the screw 7 to be forwarded.

At this time, in the initial stage to be extruded, the extrusion is gradually progressed while heating to 200 to 300 ° C. through the heating device 8, and the temperature of the molded product is maintained at 45 to 55 ° C. at the extrusion exit step.

As mentioned above, the temperature condition of the molded product at the extrusion exit is a key matter for the formation of the fibrous structure having porosity with the PP material. When the temperature is 55 ° C or higher, the flexibility of the molded product becomes too large so that the porosity inside the tissue is significantly reduced. On the contrary, below 45 ℃, the moldability deteriorates sharply, and the desired shape is not obtained and the surface treatment is not performed.

Accordingly, the cooling device 9, for example, a forced cooling device by water cooling or air cooling, is installed in order to maintain the exit temperature in the entry / exit stage at the above temperature condition, preferably about 50 ° C.

The molded article under the temperature condition is immediately passed through the mold 10 to be drawn out in the longitudinal direction to have a desired cross-sectional shape (V, U, C shape).

At this time, the tissue is loosely stretched into a fibrous material by pinching and pulling out the molded product by the extrusion force by the extruder 5, instead of pushing out the molded product and pulling it out with the withdrawal rollers 11 and 11 'installed at the front of the molding mold 10. To lose.

When the molded product having passed through the take-out rollers 11 and 11 'is cut to a predetermined length by the cutter 12, the manufacturing process of the contact filter 1 is completed.

Accordingly, the tissue shape of the filter medium of the present invention, which has completed the above-described manufacturing process, has a form axially stretched freely, such as a loose thread, when the sticky finger is attached and detached.

[Effects of the Invention]

According to the present invention as described above, the use of PP material for the waste grain sack is used to help solve environmental problems, and because the inside of the tissue is frozen and porosity is high, extremely anaerobic microbial membrane is stably settled across the inside of the tissue and both surfaces and detached As it is possible to grow without sludge, the sludge removal ability to decompose and oxidize organic matter in waste water is excellent. In addition, since it is formed of a single PP material, it is easy to manufacture and has high strength, and has an effect of long life.

Claims (2)

Melting polypropylene (PP) wastes such as grain sacks at 180 ° C. to 300 ° C. to form agglomerates and cooling the waste; and crushing the melted waste polypropylene agglomerates with a diameter of 2 to 15 mm; Inserting the shredder into a screw extruder, applying heat with a heating device, and extruding the outlet temperature at 45 ° C. to 55 ° C. while heating and pushing out the initial temperature to 200 ° C. to 300 ° C .; Molding the extrudate under the exit temperature condition to have a desired cross-sectional shape by passing a molding die; A withdrawal process of forming a porous fibrous structure by pulling the molded product passing through the molding die in a conveying direction; And a conventional cutting process of cutting the continuously drawn molding product to a predetermined length. The method of manufacturing a microorganism contact filter for wastewater purification, characterized in that it is produced. The method of claim 1, wherein a cooling device is provided to maintain the outlet temperature of the screw extruder.