KR100336820B1 - A method for manufacturing fixed tubular type biocarrier and a fixed biocarrier for biological wastewater treatment and offensive odor gas removal manufactured using the method - Google Patents

Abstract

The present invention relates to a method for preparing a fixed-phase microbial carrier for tubular wastewater treatment and odor removal and a microbial carrier prepared therefrom.

(1) coating the active inorganic material on the tubular support using an adhesive; And

(2) firing the adhesive to cure; there is provided a method for producing a fixed-bed microorganism carrier for tubular wastewater treatment and odor gas removal consisting of.

According to the present invention, by using a tubular support having a wide outer surface area, the microbial habitat space can be increased on the inner and outer surfaces of the coating layer to increase the removal efficiency of the contaminant. Therefore, high activity is also achieved in the wastewater treatment and odor removal biofilters. Can be represented.

Description

TECHNICAL FIELD OF THE INVENTION A method for producing a fixed-phase microbial carrier for tubular wastewater treatment and odor gas removal and a microbial carrier prepared therefrom

The present invention relates to a method for producing a fixed-phase microbial carrier for tubular wastewater / wastewater treatment and odor gas removal, and a fixed-phase microbial carrier prepared therefrom. More specifically, the use of a tubular support increases the outer surface area of the support for wastewater / odor and odors. The present invention relates to a method for producing a tubular microbial carrier for attaching a biofilm, and to a fixed-phase microbial carrier prepared therefrom.

In general, biologically treated wastewater / wastewater can be largely divided into activated sludge method and biofilm method. Recently, most researches have been conducted on biofilm method capable of high efficiency / high performance operation.

The biofilm method has a high concentration of microorganisms attached to the carrier to remove contaminants and can preserve low growth rate microorganisms in the carrier. In addition, it has a stable distribution of ecosystems and micro-animals, prevents sludge swelling, and shows stable removal efficiency even at high / low concentration loads. And the sludge generation amount is small and the reactor can be miniaturized.

When the fixed-phase microbial carrier used in such a biofilm method is divided according to the material, it is roughly classified into a polymer-based, ceramic-based or activated carbon-based carrier. The polymer carrier is inexpensive and convenient to be manufactured in a desired shape, but in itself, the specific surface area is small and physical / chemically unstable, and the detachment of immobilized microorganisms frequently occurs, as well as a large amount of sludge generation.

On the other hand, activated carbon or ceramic-based inorganic material carriers have advantages of large specific surface area, physical / chemical stability, thin microbial film formation, and small sludge generation amount, whereas the carriers are difficult to be molded into a desired shape and manufactured by high temperature firing. There is a disadvantage that the unit price is high. In addition, there is a problem that loses the adsorptive properties of the surface of the carrier due to high temperature firing during manufacturing.

Accordingly, Korean Patent Publication No. 97-54729 discloses a fixed-phase microbial carrier made of polyethylene in a brush shape, and Korean Patent Publication No. 95-1251 discloses a fixed-phase microbial carrier made of polyethylene in a network structure. Silver has a problem that the efficiency of the desorption of the microorganism is severe and the sludge generation amount is reduced.

In addition, in Korean Patent Laid-Open Publication Nos. 98-64937 and 98-64939, when using microbial contact materials such as nonwoven fabrics or sponges, a pyramidal or diamond-shaped superimposed skeleton structure is removed to reduce the microorganisms from being released. Although the microorganisms were reattached to the outer skeleton, they were not able to escape the limitations of the polymer carrier.

In addition, Korean Patent Publication No. 94-6932 introduces microbial contact media made by mixing / crushing / firing subsidiary materials such as stone powder, activated carbon, and filtered sand into extruded and cooled extruders equipped with a C-type die. However, the content of waste vinyl is 50% or more, the polymer properties are strong, and the specific surface area per unit volume has a disadvantage of poor performance.

In addition, the ceramic carriers disclosed in Korean Patent Publication Nos. 95-17825, 96-28966, and 97-6249 have a low firing temperature and are economically inferior, and are difficult to manufacture in a desired shape and size. The method of deodorizing organisms in an anaerobic tank using a carrier such as polyurethane foam, porous ceramics, etc. disclosed in 98-9145 is limited to a form in which a carrier is floated on top of an anaerobic tank of a sewage treatment apparatus.

Accordingly, the present inventors have prepared a low-temperature calcined clay-based fixed-phase microorganism carrier for treating wastewater / wastewater having a higher activity than conventional plastic-based or ceramic-based carriers by using two-component inorganic materials and low temperature firing. The immobilized carrier has been previously filed as Korean Patent Application No. 99-18219. However, the method has a problem that the manufacturing cost is much higher than conventional plastics because the adhesive used is expensive. In addition, the efficiency of removing high concentration or hardly degradable wastewater or odor gas is inferior.

Accordingly, an object of the present invention is to provide a method for economically preparing a highly active stationary phase microbial carrier.

Another object of the present invention is to provide a carrier having high efficiency of removing contaminants in a high concentration or hardly degradable wastewater.

It is another object of the present invention to provide a carrier usable as a biofilter for removing odor gas.

1 is a cross-sectional view showing various structures of a tube shape used as a support in the present invention, such as round / polygonal, open type, internal cross or straight.

According to one aspect of the invention,

(1) coating the active inorganic material on the tubular support using an adhesive; And

(2) firing the adhesive to cure; there is provided a method for producing a fixed-bed microorganism carrier for tubular wastewater treatment and odor gas removal consisting of.

According to the second aspect of the present invention,

There is provided a stationary microorganism carrier prepared by the method of the first aspect.

Hereinafter, the present invention will be described in detail.

In the present invention, a highly active microbial carrier can be produced by preparing a microbial carrier using a tubular support having a wide outer surface area.

The support used in the present invention uses a cylindrical tube, a polygonal tube, an open type tube, or a divided tube made of plastic, fiber, and metal. The most practical and efficient support is the cylindrical shape shown in Fig. 1 (a).

The diameter (D) of the cylindrical tube of such a simple form is suitably 5 to 20 mm, and more preferably, the surface area is reduced. Also in the case of other polygonal tubular supports, the size is preferably 5 to 20 mm. At 20mm or more, if it is manufactured in combination with a mesh-type and ring-shaped support as well as a tube shape, and well dispersed at intervals between the structures inside the support, the outer surface area is high and there is no sludge clogging phenomenon.

For example, in the cylindrical tube, the length L should be larger than the radius R = 1 / 2D (L> 1 / 2D). For example, the outer surface area of the granular carrier and the tubular carrier having a diameter of 7 mm and a length of 8 mm can be compared.

to be.

As can be seen from the calculation result, it can be seen that the surface area of the cylindrical tube carrier is about 40% wider than that of the granule carrier. It can be seen that even when the tube shape is rectangular, the surface area is increased by about 40%, and the triangle is increased by about 30%.

In another example, when the length and diameter are the same (L = D), the outer surface area is increased by 30% or more. The increase in the external surface area improves the removal efficiency of the contaminants, and the inner surface of the tubular carrier is a good habitat for low-adhesion microorganisms or higher microorganisms because the shear force of the fluid is weak.

At this time, the inner surface of the tubular partition is much larger than the cylindrical or polygonal shape. However, if the size is small, the coating on the inner surface is not good, so when using the divided form, it is better to use the diameter of 20mm or more. Tubular supports of this type can be manufactured in large quantities using polymer extruders.

In addition, the use of ring, mesh, fence, or comb, which has a large surface area and microbial retention capacity, as a support, improves the removal efficiency of contaminants. In addition, complex polymer resins used in conventional packing towers, for example, Pall rings and saddles are also available.

The active inorganic material powder is coated on the support as above through an adhesive.

The active inorganic material may be two or more inorganic materials selected from the group consisting of powdery clay, steel slag, powdered coke, activated carbon, volcanic ash, and combustion materials, wherein the clays include zeolite, vermiculite, limestone, diatomaceous earth, Kaolin, Onggi, Feldspar, Charged Earth and Talc. At this time, it is preferable to use the materials of 100mesh or more to prepare by the method of the present invention.

Among them, at least one of coke and activated carbon is added to the main active materials of zeolite and steel slag, and optionally, other activities such as volcanic ash, incineration ash, vermiculite, limestone, diatomaceous earth, kaolin, ong soil, feldspar, charge clay, talc, etc. Carriers prepared by the addition of materials have excellent performance.

Among them, zeolite is preferably a material having excellent ion exchange ability against ammonia, 20 to 80% by weight, more preferably 30 to 70%. At this time, the buffering capacity against instantaneous ammonia shock load drops below 20%, and the ability to remove organic matters falls below 80%, resulting in a decrease in carrier performance.

Since the steelmaking slag has an iron content of about 25%, iron plays a role of enhancing the activity of aerobic microorganisms by promoting the respiratory action of microorganisms, and may increase the strength of the carrier when preparing a microbial carrier. Steelmaking slag has the ability to adsorb heavy metals such as Pb, Cr, etc., it is possible to remove phosphorus by partial elution of CaO, and microbial activity can be expected by the elution of Mg ion.

The steelmaking slag is preferably used in an amount of 10 to 60% by weight, more preferably 15 to 40%. At this time, the addition amount is less than 10% can not adequately obtain the effects as described above, and at 60% or more can not be expected to improve the carrier performance due to the excessive use.

In addition, coke has a small specific surface area compared to activated carbon, but has sufficient capacity to adsorb contaminants, and can also serve as a carbon source in the absence of influent water. On the other hand, activated carbon has advantages of large specific surface area, physical / chemical stability, thin microbial film formation and small sludge generation amount.

In the method of the present invention, one or more kinds of coke and activated carbon may be added, and the amount of use thereof is preferably 5 to 50% or less, and more preferably 5 to 30% by weight. At this time, the addition amount is too small at 5% or less, and as a result, the carrier does not show the improved performance, and at 50% or more, it is difficult to expect the carrier performance improvement by the excessive addition.

Among other active substances, volcanic ash or incineration ash is a carbon source, which microorganisms break down these carbons to multiply the microorganisms and remove them in the form of carbon dioxide. In addition, diatomaceous earth is a mineral formed by the deposition of diatoms, which is light, friendly to oxygen and microorganisms, and has a large pore size at a relatively large specific surface area, which is advantageous for adsorption / growth of microorganisms. The remaining materials are used as sources to supply microorganisms with inorganic nutrients such as Mg, Si and Fe.

When these other active substances are added, it is preferable to add 30% or less, more preferably 5 to 15% based on the total weight of the active inorganic material. At this time, more than 30% does not improve the performance as a microbial carrier.

According to the above, the active inorganic material is

(a) 20 to 80% of zeolite, (b) 10 to 60% of steelmaking slag, and (c) at least one of 5 to 50% selected from the group consisting of coke and activated carbon, and (d) volcanic ash, incineration ash, vermiculite as its balance. It is preferable to add at least 30% or less selected from limestone, diatomaceous earth, kaolin, onggi earth, feldspar, charge earth, talc and the like.

More preferably, the active inorganic material comprises at least one selected from the group consisting of (a) 30 to 70% zeolite, (b) steel slag 15 to 40% and (c) coke and activated carbon in weight%, (d) The remainder is added by adding at least 5 to 15% of at least one selected from volcanic ash, incineration ash, vermiculite, limestone, diatomaceous earth, kaolin, onggi soil, feldspar, charge clay and talc.

In addition, the adhesive may be used in the form of a slurry alone or mixed with inorganic adhesives such as polymer organic adhesives such as polyurethane resins, epoxy resins, phenol resins and acrylic resins, silica sol, water glass and ceramic adhesives.

In this case, the application order of the adhesive and the active inorganic material powder to the support may be coated after the coating of the adhesive and the inorganic material powder on the support in sequence, or may be coated on the support in a slurry state after mixing the adhesive and the inorganic material powder. have. The firing frequency may be fired two or more times to increase the bonding force between the support and the adhesive as well as the firing once. In this case, the coating thickness is 5 mm or less, respectively, is advantageous in terms of performance and economics.

In addition, when coating the slurry by mixing the active inorganic material and the adhesive, it is preferable to use the active inorganic material to the adhesive in a weight ratio of 60 to 95:40 to 5. At this time, if the amount of the adhesive is less than 5%, a part of the inorganic material is released in water, and if the amount exceeds 40%, the carrier material cost is increased due to the excessive use of the adhesive as well as adversely affecting the adsorption capacity of the carrier or the ability to adhere to microorganisms. There is an expensive problem.

At this time, the firing conditions are preferably baked for 10 minutes to 10 hours at 400 ℃ or less, in which case the organic and inorganic adhesive may be mixed and then fired. In the case of the inorganic adhesive, even if it is calcined at a high temperature of 10 minutes or more at 1200 ° C, preferable results can be obtained. The temperature and time ranges are those necessary to cure the adhesive and to volatilize the solvent.

In addition, even when the active inorganic material is fired as it is, microorganisms can be maintained at a high concentration with sufficient specific surface area due to the micropores of the active material, but the microorganism carrier performance due to the generation of pore regulators and pores in the active inorganic material can be further improved.

The pore regulator may include inorganic salts such as ammonium carbonate, ammonium nitrate, organic polymer such as ethylene glycol, cellulose, starch, or powdered sawdust. In addition, the amount is preferably 30% or less based on the total weight of the active inorganic material and the adhesive mixture. If it exceeds 30%, not only the strength is poor, but also economically inadequate.

The microbial carrier thus prepared has much more specific surface area and microbial retention capacity than the conventional spherical or granular carrier.

In addition, due to the low influence of fluid flow on the inner surface of the tubular carrier, microorganisms and microorganisms having relatively low adhesion ability can be inhabited, and the outer surface area is reduced by using a smaller amount of active inorganic materials and adhesives than conventional molded carriers. There is a big advantage.

The carrier may be filled in a bed type filled as it is, or put in a cage such as a cage at less than 100% by volume, and may be added to a septic tank or wastewater treatment plant. Furthermore, it is effective for treating high concentration organic wastewater or hardly degradable wastewater, and is applicable to volatile organic compounds (VOC) or biofilters that remove odorous gases such as hydrogen sulfide and ammonia.

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

Example 1 Synthetic Wastewater Treatment

Inventive Example 1

A tubular plastic straw with a diameter of 7 mm and a length of 8 mm was first coated with a polyurethane resin, followed by 60% by weight of zeolite, 20% by weight of steel slag, 10% by weight of activated carbon, and 10% by weight of diatomaceous earth (powder form of 100mesh or more). Sprayed and coated to a thickness of about 1mm. Then cured for 20 minutes at 80 ℃.

The carrier was charged with 30% by volume in a 1900 cm ³ aeration tank reactor (upflow fixed bed reactor [filled bed type]), and then the synthetic wastewater (COD 250 ppm, NH ₄ ⁺ -N 25 ppm) was held for 5 hours. The COD removal rate was 96% and the nitrification rate was 84%.

Inventive Example 2

A carrier was prepared in the same manner as in Example 1 except that the secondary firing was performed at 120 ° C. for 20 minutes. The COD removal rate and nitrification rate were measured and found to be 97% and 85%, respectively.

Inventive Example 3

The same method as in Inventive Example 1 was conducted except that the mixture was kept in synthetic wastewater for 4 hours. After 4 hours, the COD removal rate was 94% and the nitrification rate was 81%.

Inventive Example 4

The same method as in Inventive Example 3 was conducted except that the mixture was kept in synthetic wastewater for 3 hours. After 3 hours, the COD removal rate was 87% and nitrification rate was 72%.

Inventive Example 5

Silica sol was used as the adhesive, and the same method as inventive example 1 was performed except that the sol was calcined at 120 ° C. for 30 minutes, and the COD removal rate and nitrification rate were 95% and 87%, respectively.

Inventive Example 6

The same method as in Inventive Example 1 was carried out except that the mixture was kept in synthetic wastewater (COD 300ppm, NH ₄ ⁺ -N 30ppm) for 6 hours. After 6 hours, the COD removal rate was 93% and the nitrification rate was 79%.

Inventive Example 7

Except for using 50% zeolite, 30% steelmaking slag, 10% by weight of diatomaceous earth and 10% by weight of activated carbon, the same method as inventive example 1 was carried out, and then the COD removal rate and nitrification rate were measured. Was%.

Inventive Example 8

The same procedure as in Inventive Example 1 was carried out except that 50 wt% zeolite, 25 wt% steelmaking slag, 15 wt% coke, 5 wt% activated carbon, and 5 wt% diatomaceous earth were baked at 120 ° C. for 20 minutes. The removal rate and nitrification rate were measured to be 97% and 86%, respectively.

Comparative Example 1

In the aeration tank described in Inventive Example 1 using a polyurethane porous sponge carrier, the COD removal rate and nitrification rate were 89% and 75%, respectively.

Comparative Example 2

Using the active support material composition used in Example 1 to prepare a granule-type carrier having a diameter of 7 mm and a length of 8 mm, the same experiment as in Example 1 was repeated. The COD removal rate was 92% and the nitrification rate was 80%.

Comparative Example 3

A spherical carrier having a diameter of 8 to 9 mm was prepared using the active inorganic material used in Example 1, and the same experiment as in Example 1 was repeated. The COD removal rate was 93% and the nitrification rate was 81%.

<Comparative Example 4>

The same experiment as inventive example 1 was repeated except that 10 wt% zeolite and 90 wt% activated carbon were used as the active inorganic material. As a result, the COD removal rate was 93% and the nitrification rate was 80%.

Comparative Example 5

The same experiment as in Example 1 was repeated except that 100 wt% of zeolite was used as the active inorganic material. The COD removal rate was 91% and the nitrification rate was 85%.

These are summarized in Table 1 below in order to prepare the composition, filling rate, carrier form and treatment efficiency.

Inventive Example 1 Inventive Example 2 Inventive Example 3 Inventive Example 4 Inventive Example 5 Inventive Example 6 Inventive Example 7 Inventive Example 8 Active inorganic materials Zeolite, steel slag, activated carbon, diatomaceous earth " " " " " " Zeolite, steel slag, coke, activated carbon, diatomaceous earth Usage (% by weight) 60: 20: 10: 10 " " " " " 50: 30: 10: 10 50: 25: 15: 5: 5 glue Polyurethane resin " " " Silica sol Polyurethane resin " " Pore regulator - - - - - - - - Support Tubular Plastic Straws (7mm × 8mm) " " " " " " " Firing conditions 80 ℃, 20 minutes " " " 120 ℃, 30 minutes 80 ℃, 20 minutes " 120 ℃, 20 minutes Reactor Aeration tank (30%) " " " " " " " Treated Wastewater 250 ppm COD, NH ₄ ⁺ -N 25 ppm (5 hours) " "(4 hours) "(3 hours) "(5 hours) 300 ppm COD, NH ₄ ⁺ -N 30 ppm (6 hours) 250 ppm COD, NH ₄ ⁺ -N 25 ppm (5 hours) " COD removal rate 96% 97% 94% 87% 95% 93% 95% 97% Nitrification rate 84% 85% 81% 72% 87% 79% 85% 86% Remarks - Secondary firing (120 ℃, 20 minutes) - - - - - -

Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Active inorganic materials Polyurethane Porous Sponge Carrier Zeolite, Steelmaking Slag, Activated Carbon, Diatomite " Zeolite, activated carbon Zeolite Usage (% by weight) 60: 20: 10: 10 " 10:90 100 glue Polyurethane resin " " Pore regulator - - - Support (carrier) Granule type (7mm × 8mm) carrier made of the active support material Spherical type (diameter 8-9mm) carrier made of the active support material Tubular Plastic Straws (7mm × 8mm) " Firing conditions 80 ℃, 20 minutes " " " " Reactor Aeration tank (30%) " " " " Treated Wastewater 250 ppm COD, NH ₄ ⁺ -N 25 ppm (5 hours) " " " " COD removal rate 89% 92% 93% 93% 91% Nitrification rate 75% 80% 81% 80% 85%

As shown in Tables 1a and 1b, the same active inorganic material composition as in the present invention was used when the synthetic wastewater was treated for 4 hours by using the tubular carrier as a support by the method of the present invention (Invention Example 3), but the support, In particular, since the treatment efficiency is similar when the synthetic wastewater is treated for 5 hours without using the tubular support separately (Comparative Examples 2 and 3), it can be confirmed that the carrier prepared by the present invention is more active.

In addition, COD 250ppm, NH ₄ ⁺ -N 25ppm synthetic wastewater treated with synthetic wastewater for 5 hours, Comparative Examples 2 and 3 are active inorganic materials COD 300ppm, NH ₄ ⁺ -N 30ppm more difficult to decompose synthetic wastewater 6 It is also supported by the fact that the time processing (Invention Example 6) and the processing result are similar.

Further, when the active inorganic material is outside the composition range of the present invention (Comparative Examples 4 and 5), it was confirmed that both the COD removal rate and the nitrification rate were poor.

Example 2-Highly Concentrated Hardly Degradable Wastewater Treatment

Inventive Example 9

The same method as inventive example 1, except that the carrier was filled with 60% by volume and kept in high concentration hardly degradable wastewater (COD 1200ppm [hardly decomposable COD = 350ppm], NH ₄ ⁺ -N 150ppm, CN ^- 5ppm) for 10 hours. Was repeated. After 10 hours, the COD removal rate was 84% and the nitrification rate was 67%.

Inventive Example 10

As a result of the same experiment as that of Example 9 using the carrier prepared in Example 8, the measured COD removal rate was 86%, and the nitrification rate was 67%.

Comparative Example 6

Using the granule-type carrier prepared in Comparative Example 2, the same experiment as in Example 9 showed that the COD removal rate was 75% and the nitrification rate was 53%.

These are summarized in Table 2 in order to prepare the composition, filling rate, carrier form and treatment efficiency.

Inventive Example 9 Comparative Example 6 Inventive Example 10 Active inorganic materials Zeolite, steel slag, activated carbon, diatomaceous earth " Zeolite, steel slag, coke, activated carbon, diatomaceous earth Usage (% by weight) 60: 20: 10: 10 " 50: 25: 15: 5: 5 glue Polyurethane resin " " Pore regulator - - - Support (carrier) Tubular plastic straws (Granule type carrier made of the active inorganic material) Firing conditions 80 ℃, 20 minutes " 120 ℃, 20 minutes Reactor Aeration tank (60% filling) " " Treated Wastewater 1200 ppm COD, NH ₄ ⁺ -N 350 ppm, CN ^- 5 ppm (10 hours) " " COD removal rate 84% 75% 86% Nitrification rate 67% 53% 67%

As shown in Table 2, it was confirmed that the carrier prepared by the method of the present invention is much better treatment efficiency for high activity hardly degradable wastewater.

Example 3 Odor Gas Treatment

Inventive Example 11

50 vol.% Of a 120 mm × 1000 mm columnar reactor was charged using the carrier prepared in Inventive Example 2, 20 ppm of hydrogen sulfide gas was flowed at 5 L / min, and the removal rate thereof was 99%.

Inventive Example 12

The same experiment as in Example 8 was repeated except that 70% of the support prepared in Inventive Example 5 was charged and 20 ppm of ammonia gas was flowed at 10 L / min. The removal rate was 99%.

Comparative Example 7

After coating a water-soluble epoxy resin on a foamed plastic (styrofoam) having a diameter of 4 to 6mm, the active material having the same component ratio as in Inventive Example 1 was coated using a ball coater.

Then, the resultant was cured by firing at 110 ° C. for 20 minutes to prepare a microbial carrier having a hollow ball shape in which the foamed plastic was crushed to about 3/4. The specific gravity of the prepared carrier was 0.6 to 0.8 g / cm ³ .

The carrier thus prepared was tested under the same conditions as those of Inventive Example 11 and Inventive Example 12, and the removal rates were 97 to 99% for hydrogen sulfide and 98 to 99% for ammonia.

These are summarized in Table 3 in order to prepare the composition, filling rate, carrier form and treatment efficiency.

Inventive Example 11 Comparative Example 7a Inventive Example 12 Comparative Example 7b Active inorganic materials Zeolite, steel slag, activated carbon, diatomaceous earth " " " Usage (% by weight) 60: 20: 10: 10 " " " glue Polyurethane resin Water soluble epoxy resin Silica sol Water soluble epoxy resin Pore regulator - - - - Support Tubular Plastic Straws (7mm × 8mm) Foamed plastic (4-6 mm in diameter) " Foamed plastic (4-6 mm in diameter) Firing conditions 80 ℃, 20 minutes 110 ℃, 20 minutes " 110 ℃, 20 minutes Reactor Aeration tank (50% filling) " "(70% filling) " Treatment gas Hydrogen Sulfide (5ℓ / min) 20ppm " 20 ppm of ammonia (5ℓ / min) " Removal rate 99% 97-99% 99% 98-99% Remarks Secondary firing (120 ℃, 2 minutes) - - -

As shown in Table 3, when the foamed plastic having a smaller outer surface area was used as the support, it was confirmed that the odor gas removal rate was slightly decreased. In addition, as a result of the experiment when the flow rate of the malodorous gas to be removed is 5ℓ / min, it can be expected that the difference in the odor gas removal rate will be remarkable in the more extreme state.

Example 4-Using Support with Improved External Surface Area

Inventive Example 13

The same method as inventive example 1 was carried out except that the coating was coated on a cross-shaped tube (20 mm × 25 mm) using a water-soluble epoxy resin and then cured at 100 ° C. for 15 minutes, and the carrier filling rate was increased to 50%. Next, as a result of measuring the COD removal rate and nitrification rate, it was 96% and 83%, respectively.

Inventive Example 14

Except that 20% by weight of ammonium carbonate was mixed with the active inorganic material, the same method as in Example 13 was carried out, and the measured COD removal rate and nitrification rate were 96% and 85%, respectively.

Inventive Example 15

After filling the carrier prepared in Example 13 with a column-type aeration tank (100mm × 600mm) and then staying for 3 hours, the same method as inventive example 1 was performed, and the measured COD removal rate and nitrification rate were 97% and 85%, respectively.

To summarize these in order to prepare the composition, filling rate, carrier form and treatment efficiency, it is shown in Table 4.

Inventive Example 13 Inventive Example 14 Inventive Example 15 Active inorganic materials Zeolite, steel slag, activated carbon, diatomaceous earth " " Usage (% by weight) 60: 20: 10: 10 " " glue Water soluble epoxy resin " " Pore regulator - Ammonium carbonate - Support Cross tube (20mm × 25mm) inside " " Firing conditions 100 ° C., 15 minutes " " Reactor Aeration tank (50%) "(50%) Column type aeration tank (100% filling) (3 hours) Treated Wastewater COD 250ppm, NH ₄ ⁺ -N 25ppm " " COD removal rate 96% 96% 97% Nitrification rate 83% 85% 85%

As shown in Table 4, as a result of the production of the fixed bed carrier by the method of the present invention, the wastewater treatment efficiency is more improved, and even when a larger size aeration tank is used (invention example 15), better efficiency can be obtained in a short time. Since it is confirmed that the use of the tube-shaped support divided inside, it can be seen that due to the improvement of the outer surface area, more significant treatment efficiency can be obtained.

Advantages of the inorganic material-coated microbial carriers produced by the production method of the present invention are as follows.

(1) Because the outer surface area is wider than the existing carriers, the microorganisms grow at a high concentration, so the control of pollutants is excellent, and thus it is applicable to the treatment of high concentration organic wastewater or hardly degradable wastewater.

(2) The material is microorganism friendly, and the binding force between microorganisms and clay inorganic materials is improved, so it is stable to flow / concentration load fluctuations.

(3) Conventional polymer carriers have a large amount of sludge due to a large number of microorganisms, but the adhesion strength is weak, so that it is easy to detach when the concentration and flow rate are changed. However, the carrier prepared by the method of the present invention has improved adhesion strength as the microorganisms are thinly attached. It is excellent in activity.

(4) The sludge clogging phenomenon which is a problem of the fixed carrier can be minimized.

(5) It can be installed as a biofilter for odor removal in wastewater treatment, sludge treatment, or chemical plant where odor is generated.

According to the above, by using a tubular support having a large outer surface area, the microbial habitat space is increased on the inner and outer surfaces of the coating layer, so that it is also applicable to hardly decomposable or high concentration wastewater when treating sewage / wastewater, VOC (volatile organic compound) or hydrogen sulfide It is also applicable to microbial carriers for biofilters that remove odorous gases such as ammonia.

Claims (9)

(1) coating the active inorganic material on the tubular support using an adhesive; And (2) firing the adhesive so as to cure; tubular wastewater treatment and odor gas removal fixed phase microbial carrier manufacturing method consisting of According to claim 1, wherein the tubular support is made of plastic, fibers, wood and metal, cylindrical, polygonal or open type of tubular shape having a diameter of 5mm or more and a length greater than the radius, or a tubular shape of 20mm or more and divided inside How to characterize The method of claim 2, wherein when the tubular support is cylindrical or polygonal, its diameter is 20 mm or more, and the combination is used in combination with a mesh or a ring. The method of claim 1, wherein the active inorganic material is in weight percent (a) 20 to 80% zeolite, (b) 10 to 60% steelmaking slag and (c) to 5 to 50% of one or more selected from the group consisting of coke and activated carbon, (d) the remainder comprising 30% or less of one or more additives selected from volcanic ash, incineration ash, vermiculite, limestone, diatomaceous earth, kaolin, ongyo earth, feldspar, charge earth, talc, etc. The method of claim 4, wherein the active inorganic material is in weight percent (a) 30 to 70% zeolite, (b) 15 to 40% steelmaking slag and (c) to 5 to 30% of one or more selected from the group consisting of coke and activated carbon, (d) a balance comprising 5-15% of one or more additives selected from volcanic ash, incineration ash, vermiculite, limestone, diatomaceous earth, kaolin, ongyo earth, feldspar, charge earth, talc, etc. The method of claim 1, wherein the adhesive is used as a slurry in which polyurethane resin, epoxy resin, phenol resin, acrylic resin, silica sol, water glass, or ceramic adhesive is used alone or mixed. The method of claim 1, wherein the active inorganic material is a pore regulator selected from inorganic salts such as sawdust, ammonium carbonate and ammonium nitrate, organic polymer materials such as ethylene glycol, cellulose and starch, based on the total weight of the adhesive and the active inorganic material. Mixing up to 30% by weight or less and baking after coating to form pores in the coating layer The method of claim 1, wherein the coating is performed by applying an adhesive and an inorganic material powder sequentially on a support or by using a slurry mixed with an adhesive and an inorganic material powder to a thickness of 5 mm or less. Fixed-phase microbial carrier prepared by the method of claim 1