JP2001300253A - Deodorizing material and deodorizing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a deodorizing material which ensures the upgraded performance of a biodeodorizing process and also the shortening of an acclimatizing period under the biodeodorizing process as a filler having a highly deodorizing performance obtained by making effective use of limited natural resources and to provide a deodorizing device using the deodorizing material. SOLUTION: This deodorizing material is made up of a sintered body obtained by sintering an inorganic material and a carbonaceous substance applied to the surface of the former. The carbonaceous substance is preferably carbide or active carbon, and further is preferably the one to which an acid, an alkali or an oxidizer is internally added. In the device for deodorizing a smelly gas, the deodorizing material formed of the sintered body obtained by sintering the inorganic material and the carbonaceous substance applied to the surface of the sintered body is used as a filler, and an odorous component contained in the smelly gas is removed by dringing the smelly gas into contact with the deodorizing material. A biodeodorization is acceptable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to odors generated during the treatment of wastewater such as sewage, human waste or industrial wastewater, and the treatment and disposal of organic waste such as organic sludge and garbage generated during wastewater treatment. The present invention relates to a deodorizing material and a deodorizing device used for deodorizing water.

[0002]

2. Description of the Related Art At the time of wastewater treatment of sewage, human waste or industrial wastewater, or at the time of treatment and disposal of organic waste such as organic sludge and garbage generated by wastewater treatment, odorous gas is generated. Improvement of the working environment, environmental measures for local residents, and measures to prevent corrosion of equipment and equipment are extremely important issues. As a deodorizing method, a chemical cleaning method using an acid or an alkali, an activated carbon adsorption method, a biological deodorizing method, and the like have been put to practical use.

The chemical cleaning method is a treatment method in which a cleaning liquid containing an acid or an alkali is brought into contact with a malodorous gas to be treated so that odor components in the gas are absorbed by the cleaning liquid to deodorize the gas. The activated carbon adsorption method is a treatment method in which an odor component is adsorbed on activated carbon having a large surface area and a large number of pores to deodorize. As the activated carbon, an impregnated activated carbon impregnated with an acid, an alkali, or an oxidizing agent can be widely used.

There are three types of biological deodorization methods: a method of blowing a malodorous gas into an aeration tank, a soil deodorization method in which a filler (soil) to which microorganisms are attached is brought into contact with a malodorous gas, and a packed tower type deodorization method. are categorized. Among them, the soil deodorization method uses soil, generally black soil, in the packed bed. Kuroboku soil has good water retention and can store a large amount of microorganisms in it, so it has high odor removal performance. However, continuous operation of the deodorizing equipment has the disadvantage that the ventilation resistance of the odorous gas increases. In particular, the impact of rainfall is very large. Therefore, in order to perform stable operation, the gas flow velocity of the packed bed is set to 5 m.
It is necessary to set as low as m / sec to 10 mm / sec.

On the other hand, as a filler in the packed tower type deodorizing method, an inorganic material such as granular activated carbon or ceramics or a plastic molded product is used. These packing materials have improved ventilation resistance of the odorous gas as compared with the packing material of the soil deodorization method. Therefore, the gas flow rate of the packed bed in the packed tower deodorization method is 20 to 60 times that of the soil deodorization method. And high. The soil deodorization method using black soil in the packed bed has been put into practical use from an early stage due to its simple equipment structure and easy maintenance, and has been widely used.

The packed tower type deodorization method using a plastic molded article and an inorganic material such as granular activated carbon or ceramics as a filler is because the equipment is compactly arranged.
In recent years, its spread has been remarkable. As described above, various deodorizing methods have been put to practical use or proposed, but the method for efficiently deodorizing low-concentration odors is the only practical deodorizing method using activated carbon adsorption at present.

[0007]

The deodorizing performance of the above-mentioned soil deodorizing method and packed tower type deodorizing method is determined by the performance of the filler used. Therefore, development of a filler having excellent performance at low cost is desired. The filler used in this deodorization method is also a valuable resource, and therefore, it is desirable that the filler be inexpensive and suitable for recycling waste. In the biological deodorization method, activated carbon having pores as a habitat for microorganisms involved in deodorization is an ideal filler. In a biological deodorizing device using activated carbon as a filler, at the beginning of operation, microorganisms easily adhere to the surface of the filled activated carbon. it can.

[0008] However, non-impregnated activated carbon without a drug impregnated therein has many pores inside,
Although the odor component can be adsorbed to the inside of the activated carbon, the diffusion of the odor component to the center of the activated carbon is slow, so that there is a disadvantage that the vicinity of the center of the activated carbon particles is not effectively used. In addition, there is a problem that the contact between the microorganism and the odor necessary for the reaction between the odor component and the microorganism and the supply of oxygen are not performed to the inside of the activated carbon. For this reason, microorganisms cannot live in activated carbon. As described above, the microorganisms live only on the surface of the activated carbon, function to decompose and remove odor components there, and cannot live in the center and near the center of the activated carbon, so that the inside of the activated carbon did not function effectively.

[0009] In the deodorizing method using activated carbon,
There is a method of deodorizing treatment by contacting the odor component with the drug-impregnated activated carbon in which the drug is impregnated on the activated carbon, and effectively removing the basic odor component such as ammonia with the activated carbon. Therefore, an acid is impregnated on activated carbon, or an oxidizing agent is impregnated on non-impregnated activated carbon as described above to remove neutral odor components such as methyl sulfide and methyl disulfide, which have a small adsorption amount. You.
In this way, when the drug is impregnated on the activated carbon, the pores inside the activated carbon are blocked by the drug, so that the drug near the center from the activated carbon surface cannot sufficiently contact the odor component, and There is a problem that the used drug does not function effectively. Such a problem is a waste of expensive activated carbon and chemicals, and wastes valuable resources. In view of such circumstances, an object of the present invention is to effectively utilize limited resources, provide a filler having excellent deodorization performance, improve the performance of the biological deodorization method, and further improve the performance of the biological deodorization method. They try to shorten it.

[0010]

The present invention for solving the above-mentioned problems is constituted by the following items. (1) A deodorizer characterized in that the surface of a sintered body obtained by firing an inorganic material is coated with a carbon material. (2) The deodorizing material according to the above (1), wherein the carbon substance is a carbide or activated carbon. (3) The deodorizing material according to the above (1) or (2), wherein an acid, an alkali or an oxidizing agent is impregnated inside the carbon material. (4) An apparatus for deodorizing a malodorous gas, which has a filling layer filled with a deodorizing material coated with a carbon material on the surface of a sintered body obtained by firing an inorganic material, and has an inlet for a malodorous gas and a processing gas from which an odorous component is removed. A deodorizing device characterized by having a discharge port. (5) An apparatus for deodorizing malodorous gas, which has a filling layer in which a surface of a sintered body obtained by firing an inorganic material is coated with a carbon substance and is filled with a deodorizing material holding microorganisms having a biological deodorizing action. A deodorizing device, wherein a water sprinkler is provided above the packed bed, an introduction port for the malodorous gas is provided below the packed bed, and an outlet for the processing gas is provided above the packed bed.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail, but the present invention is not limited thereto. The raw materials for producing the inorganic sintered body used in the present invention are foundry sand and fine waste castings, silica sand, and clay generated during the regeneration of the foundry sand. In addition, industrial waste containing these can also be used as a raw material. The target odor components of the present invention include ammonia, amines (eg, trimethylamine), aldehydes, volatile fatty acids (such as acetic acid), alcohols (propyl alcohol, butyl alcohol), hydrogen sulfide, methyl mercaptan, methyl sulfide, and methyl disulfide. And so on.

The method for producing the inorganic sintered body serving as the base of the deodorizing material of the present invention is not particularly limited. For example, an inorganic raw material such as waste foundry sand is kneaded by a kneader such as a kneader, and then granulated to a predetermined size by a bread granulator or a fluidized bed granulator. The granulated material thus granulated is preferably naturally dried, or forcibly dried by heat or the like, and then fired at 800 to 1000 ° C. for about 1 hour in a heating furnace such as an electric furnace. An inorganic sintered body is obtained. Incidentally, a commercially available ceramic sintered material can be used as the inorganic sintered body of the present invention. The formed body obtained by coating the surface of the inorganic sintered body produced by the above method or a commercially available sintered inorganic granulated material with a carbon material is the deodorizing material of the present invention.

The method for producing the deodorizing material of the present invention obtained by coating the surface of an inorganic sintered body or a sintered inorganic granulated product with a carbon material is not particularly limited. It is an essential condition of the present invention that the adsorbent is coated with a carbon material. As an example, an inorganic sintered body or a commercially available ceramic sintered body and a carbon material were mixed with tar or pitch as a binder, dried, and then fired in a reducing atmosphere to coat the carbon material. An inorganic sintered body can be manufactured. The shape of the inorganic sintered body coated with the carbon material is preferably spherical or cylindrical. The inorganic sintered body preferably has a particle size of 2 to 20 mm and a uniformity coefficient in the range of 1.1 to 2.

When the particle size is 2 mm or less, the clogging of the packed bed and the ventilation resistance of the odorous gas are increased, and the malodorous gas is caused to flow unevenly, so that the deodorizing performance is reduced. On the other hand, if it exceeds 20 mm, the surface area of the filler decreases, and the chance of contact between the odorous gas and the filler decreases, so that the deodorizing effect decreases. The particle size of the sintered body coated with the carbon material is preferably in the range of 2 to 20 mm, and among the sintered bodies coated with the carbon material having an evenness coefficient of 1.1 to 2,
An adsorbent having a specific particle size or uniformity coefficient may be used alone, or a plurality of adsorbents having different particle sizes may be mixed and used.

In the sintered body coated with the carbon material, the coating amount of the carbon material is in the range of 5 to 50%, preferably 5 to 30% of the weight of the inorganic sintered body. The thickness of the coating of the carbon material is in the range of 1/2 to 1/5 of the particle size of the sintered body. The coating amount is 5% or less, or the coating thickness is 1 /
If it is 5 or less, the amount of adsorbed gas and the amount of chemicals attached are small, and the deodorizing effect cannot be expected. On the other hand, if the coating amount is 50% by weight or the coating thickness exceeds 1/2 of the particle size of the sintered body, an expensive carbon substance cannot be effectively used for adsorption and is wasted.

In the present invention, it is preferable that the carbon substance is a carbide or activated carbon, which has a large number of pores on its surface or in the inside, and which absorbs and removes odor components inside the pores. Can be done.
The carbide of the present invention is produced by shielding an organic substance from oxygen and heating in a reducing atmosphere, and does not include a carbide which is a compound of metal and carbon. Even if the entire adsorbent is activated carbon with high adsorption performance, the diffusion of the odor component into the activated carbon center gradually slows down, so the activated carbon adsorption performance is not broken by the odor component up to the vicinity of the activated carbon center. Also,
In some cases, the regulated value may be exceeded at the outlet of the activated carbon adsorption tower. In this case, the activated carbon must be regenerated even if the entire activated carbon is not sufficiently used. Thus, practically, as the adsorbent, the effective adsorption range is considered to be about several millimeters from the surface of the adsorbent toward the center. Of course, when the ventilation rate of the offensive odor gas is reduced, the inside of the activated carbon is used more effectively, but it becomes necessary to enlarge the activated carbon adsorption tower, which is not practical.

Preferably, the carbide is obtained by heating and distillation of wood, coconut shell, coal and petroleum raw materials at 400 to 600 ° C. The carbon in the present invention is preferably activated carbon. Activated carbon has better initial adsorption and removal of odor than carbides, and it is desirable to use activated carbon with stable quality. Activated carbon is produced by activating the above-mentioned carbide with a chemical or steam. It is possible to use sieved or dust collected during activated carbon production or activated carbon regeneration, which is effective in saving resources and reducing waste. Activated carbon before regeneration may be used.

Further, the present invention uses an impregnated carbon substance to which an acid, an alkali or an oxidizing agent is impregnated inside or on the surface of the carbon substance, and absorbs and decomposes the odor component with the impregnated chemical. it can. Since the adsorption of the odor component by the activated carbon is performed in the vicinity of the surface of the activated carbon, the effective use range of the drug even in the adsorbent to which the drug is attached is considered to be the surface of the adsorbent. To this end, the carbon material of the inorganic sintered body coated with the carbon material of the present invention is further neutralized and absorbed by the adsorbent having an acid, alkali, or oxidizing agent impregnated therein. A method of decomposition and removal can be performed.

The chemicals for impregnating the inorganic sintered body coated with the carbon material are preferably all water-soluble. Examples of the acid include inorganic acids such as phosphoric acid and sulfuric acid, and examples of the alkali include sodium hydroxide and potassium hydroxide. Examples of the halogen gas that is a gaseous oxidizing agent include chlorine, bromine, and iodine. The halogen gas is brought into contact with an inorganic sintered body coated with a carbon material to hold the halogen gas inside the carbon material. It can be. Water-soluble oxidizing agents include iodine, chlorate, bromate, iodate, perchlorate, hypochlorite, chlorite, nitrite, permanganate, ammonium persulfate, and stable Chlorine dioxide, peroxides and the like.

These oxidizing agents are prepared in an aqueous solution having a predetermined concentration, and an inorganic sintered body coated with a dry carbon material is immersed in the aqueous solution, and the inside of the carbon material of the inorganic sintered body coated with the carbon material is immersed. Infiltrate the oxidant. After separating the excess aqueous solution of the oxidizing agent, an adsorbent in which the inorganic sintered body coated with the carbon substance holds the agent is manufactured. Other usable drugs include hydrazine and hydrazine salts. The addition amount of the chemical for impregnating the inorganic sintered body coated with the carbon substance is preferably as high as possible, but the maximum water absorption of the inorganic sintered body coated with the carbon substance is 30%.
The amount of the water-soluble agent, for example, phosphoric acid added is 10% by weight per inorganic sintered body coated with a dry carbon material, and 10% per gaseous bromine per inorganic sintered body coated with a dry carbon material.
% Of sodium iodate, which is relatively insoluble in water, is several weight% per inorganic sintered body coated with a carbon material.

Further, the present invention intends to use the deodorant coated with the carbon substance according to the present invention described above as a filler for a soil deodorizer and a filler for other biological deodorizers in a biological deodorization method. . FIG. 2 is a schematic explanatory view of a biological deodorizing apparatus in a case where water is transiently sprinkled, in which a raw gas (odorous gas) 3 is supplied to a lower portion of a column 1 and a packing for holding a packing material 2 in which microorganisms live is shown. From the top through the layer, it becomes the processing gas 5 and flows out to the atmosphere. Thus, the odor components in the raw gas 3 are decomposed by microorganisms while the raw gas 3 passes through the packed bed holding the filler 2. This filling layer is composed of a filler which is an inorganic sintered body coated with a carbon material. The height of the packed layer is usually 500 mm to 1000
mm. From the upper part of the packed bed, it is possible to temporarily and temporarily use industrial water, so that the filler 2 of the packed bed is not dried.
The biological treatment water or the like is sprinkled from the sprinkling line 6. The liquid that has passed through the packed bed is discharged from the drain 4 at the lower part of the apparatus.

FIG. 3 is a schematic explanatory view of a packed tower type biological deodorizing apparatus. The raw gas (malodorous gas) 3 supplied to the lower part of the column 1 forms a packed bed holding a packing material 2 in which microorganisms live. The gas passes through the top and becomes the processing gas 5 and flows out to the atmosphere.
When passing through the packed bed holding the filler 2, the odor components in the malodorous gas are decomposed by microorganisms living in the packed bed.

This filling layer is constituted by a filling material which is an inorganic sintered body coated with a carbon material. The height of the packed bed is 500 to 1000 mm per tower. From the upper part of the packed bed, the filler passing liquid staying in the lower part of the apparatus may be transferred to the water sprinkling line 6 by the circulating pump 7 and sprinkled on the column 1 so that the packing 2 of the packed bed is not dried. . Further, industrial water, biologically treated water, or the like can be directly sprinkled from the upper portion of the packed bed. Sprinkling may be continuous or intermittent. Watering rate is 1-5 liters / m per unit processing gas volume.
It is in the range of ³ -gas, usually 3 l / m ³ -gas. Reference numeral 8 denotes makeup water, which is supplemented when water supply to the column 1 by the circulation pump 7 is insufficient. 4 drains excess water.

[0024]

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples.

Example 1 FIG. 1 is a drawing for explaining the outline of an activated carbon adsorption apparatus used in Example 1. 150 mm inner diameter and 10 height shown in FIG.
Using three columns of 00 mm polyvinyl chloride columns, each column was filled with the following adsorbent to a height of 500 mm, and the linear velocity (LV) of the cylinder was 0.3 m / sec, and the cylinder velocity (S
V) A continuous test was performed at 2160 [1 / h]. Each cylinder was filled with the following adsorbent to a height of 500 mm. First cylinder: coconut shell activated carbon having a particle size of 2 to 5 mm. Second cylinder: an inorganic sintered body coated with activated carbon having an effective diameter of 3 mm and a uniformity coefficient of 1.2. Third cylinder: an inorganic sintered body coated with carbide having an effective diameter of 3 mm and a uniformity coefficient of 1.2.

The tested inorganic sintered bodies were prepared as follows. Water was added to waste casting sand having a particle size of about 0.075 mm or less, kneaded, granulated into a spherical shape using a granulator, dried, and fired at 800 ° C. for 70 minutes. After cooling, the mixture was classified with a sieve to obtain a desired inorganic sintered body. To 1 part of the inorganic sintered body having an effective diameter of 2.5 mm, 0.2 part of powdered coconut shell activated carbon and 0.1 part of petroleum pitch are added and kneaded, and then granulated by a granulator and then dried. Then, the resultant was fired at 800 ° C. for 70 minutes in a nitrogen stream to produce an inorganic sintered body coated with activated carbon. In addition, an inorganic sintered body coated with activated carbon was produced in the same manner. All were classified and screened so that the effective diameter was 3 mm and the uniformity coefficient was 1.2.

[0027] A commercially available standard gas and air, hydrogen sulfide 2pp
m, a simulation gas prepared to 1 ppm of methyl sulfide and 1 ppm of methyl disulfide was used for the test as a test raw gas. Table 1 shows the concentration of each odor component of the processing gas 30 days after the start of ventilation. The hydrogen sulfide concentration of the inorganic sintered body coated with the activated carbon was similar to that of the coconut shell activated carbon in 30 days of ventilation. An inorganic sintered body coated with carbide using an inexpensive carbon material had insufficient hydrogen sulfide removal properties. In addition, any of the adsorbents had a low effect on removing neutral odor components such as methyl sulfide and methyl disulfide.

[0028]

[Table 1]

Example 2 The following adsorbent was added to the column used in Example 1 for 500 m each.
m, and the simulation gas provided in Example 1 was continuously ventilated under the same conditions. First cylinder: sodium bromate impregnated carbon (coconut shell activated carbon) having a particle size of 2 to 5 mm. The second cylinder: an adsorbent obtained by impregnating sodium bromate into an inorganic sintered body coated with activated carbon having an effective diameter of 3 mm and a uniformity coefficient of 1.2. Third cylinder: an adsorbent obtained by impregnating sodium bromate to an inorganic sintered body coated with a carbide having an effective diameter of 3 mm and a uniformity coefficient of 1.2.

After immersing 10 liters of coconut shell activated carbon in 20 liters of a 5% aqueous sodium bromate solution for about 5 hours,
By air-drying for 3 days, a sodium bromate-impregnated carbon was produced and used. For the inorganic sintered body coated with the activated carbon and the inorganic sintered body coated with the carbide produced in Example 1, an adsorbent was produced by applying a chemical agent in the same manner, and these adsorbents were subjected to a test. . Table 2 starts ventilation 3
The concentration of each odor component of the processing gas after 0 days is shown. As is clear from the results in Table 2, it is clear that the two types of inorganic sintered bodies coated with carbide and the inorganic sintered bodies coated with activated carbon have the same deodorizing effect as activated carbon impregnated with sodium bromate. Became.

[0031]

[Table 2]

Embodiment 3 As shown in FIG. 2, the inner diameter is 150 mm and the height is 1000 mm.
Each of the three test columns made of polyvinyl chloride is filled with black clay, inorganic sintered body, inorganic sintered body coated with carbide, and inorganic sintered body coated with activated carbon to a height of 500 mm. did. The particle size of the filler other than the Andosol was 3 mm and the uniformity coefficient was 1.2. The tested inorganic sintered body was prepared as follows. Water was added to waste casting sand having a particle size of about 0.075 mm or less, kneaded, granulated in a spherical shape with a granulator, dried, and fired at 800 ° C. for 70 minutes. After cooling, the mixture was classified with a sieve to produce an inorganic sintered body having an effective diameter of 2.5 mm.

To 1 part of the above-prepared inorganic sintered body having an effective diameter of 2.5 mm, 0.2 part of powdered coconut shell activated carbon and 0.2 part of petroleum pitch are added and kneaded, and granulated by a granulator. After drying,
It was fired at 800 ° C. for 70 minutes in a nitrogen stream to produce an inorganic sintered body coated with activated carbon. In addition, with respect to the inorganic sintered body coated with carbide, powdered charcoal was added instead of powdered coconut shell activated carbon, and an inorganic sintered body coated with activated carbon was similarly produced. In each case, the samples were classified using a sieve so that the effective diameter was 3 mm and the uniformity coefficient was 1.2. A test gas prepared from commercially available standard gas and air was used as a source gas. The composition of this raw gas is that hydrogen sulfide is 2p
pm, 1 ppm of methyl mercaptan.

The test conditions are as follows. Superficial linear velocity: 10 mm / sec watering amount (watering amount of unit processing gas amount per): 1 l / m ³ sprinkling method: Intermittent water spray, once / day Gas Temperature: 20-25 ° C. packed bed cross-sectional area: 0. 2m ² Packed bed height: 0.5m Filling capacity: 8.8 liter Seed sludge: Excess sludge in the form of sewage treatment Seed sludge addition amount: 500 mg / filling capacity Makeup water: Biologically treated water

After adjusting the amount of seed sludge to be 500 mg / filling capacity, the raw gas was continuously ventilated from the lower part of the packed bed, and biologically treated water was intermittently sprinkled from the upper part of the packed bed. About 1
After a week, the removal rate of hydrogen sulfide became 90%, and the adaptation was completed. Table 3 shows the treated gas (exit gas) one month after the start of the test.
Shows the concentration of the odor component of Table 4 shows changes in the pressure loss of the packed bed. The pressure drop of a column filled with Andosol is
Four weeks after the start of the test, the pressure rose to 1400 Pa, and aeration became impossible in the sixth week.

[0036]

[Table 3]

[0037]

[Table 4]

Embodiment 4 FIG. 3 is a view showing the concept of a biological deodorizing apparatus used in Embodiment 4 of the present invention. An experiment similar to that of Example 3 was performed using the biological deodorizer of FIG. 3 except for the following conditions. Superficial linear velocity: 0.2 m / sec watering amount (unit processing amount of gas per): 2 l / m ³ sprinkling method: Continuous watering Incidentally, the particle diameter of the inorganic sintered body in place of the andosol Example 3 Zeolite with uniformity was used.

After about one week, all of the fillers had a hydrogen sulfide removal rate of 90% or more, but the removal rate of methyl mercaptan was about 30% for zeolite and inorganic sintered body, and was coated with activated carbon and carbide. The content of the inorganic sintered body was 80% or more.
After two months, the removal rate of methyl mercaptan from the zeolite and the inorganic sintered body was as low as 40 to 50%. Table 5 shows the concentration of each odor component of the processing gas (outlet gas) two months after the start of the test.

[0040]

[Table 5]

[0041]

By using an inorganic sintered body coated with the carbon material of the present invention or an adsorbent obtained by impregnating the carbon material with a chemical as a filler and a filler for biological deodorization, It works. (1) Saving expensive resources and energy such as activated carbon,
Contribute to waste reduction. (2) By coating a carbon material with high adsorption performance or a carbon material to which a chemical is impregnated in a range effective for odor removal, the amount of the chemical to be impregnated is reduced, and effective and economical deodorizing treatment is possible. As such, it greatly contributes to this type of processing. (3) The adaptation period can be shortened. (4) Microorganisms easily adhere and have a high deodorizing effect. (5) The airflow resistance of the filling layer is small.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of an activated carbon adsorption device according to the present invention.

FIG. 2 is a schematic explanatory view of a biological deodorizing apparatus according to the present invention.

FIG. 3 is a schematic explanatory view of a biological deodorizing apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Column 2 Filling material 3 Raw gas 4 Drain 5 Processing gas 6 Sprinkling line 7 Circulation pump 8 Make-up water

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) B01D 53/77 B01D 53/34 116C 53/86 ZAB 53/36 ZABH B01J 20/20 F-term (Reference) 4C080 AA05 BB02 CC03 CC04 CC05 CC08 CC09 CC13 CC15 HH05 JJ03 KK08 LL07 LL10 MM05 MM33 NN01 NN04 NN14 4D002 AA03 AA05 AA06 AA13 AA14 AA32 AA40 AB02 AC10 BA02 BA04 BA17 CA07 DA02 DA17 DA41 DA44 DA04 DA66 DA66 DA02 DA17 DA41 DA44 DA02 AA05B AA35B AA42B AA75C BA05 BA09 BA20 CA24 CA25 DA02

Claims (5)

[Claims] 1. A deodorizing material wherein a surface of a sintered body obtained by firing an inorganic material is coated with a carbon substance. 2. The deodorizing material according to claim 1, wherein the carbon material is a carbide or activated carbon. 3. The deodorizing material according to claim 1, wherein an acid, an alkali or an oxidizing agent is impregnated inside the carbon material. 4. An apparatus for deodorizing a malodorous gas, wherein a surface of a sintered body obtained by firing an inorganic material is provided with a filling layer filled with a deodorizing material coated with a carbon material, and an inlet for the malodorous gas and an odor component are removed. A deodorizing device having a processing gas outlet. 5. A device for deodorizing a malodorous gas, wherein a surface of a sintered body obtained by firing an inorganic material is coated with a carbon substance, and the surface of the carbon material is filled with a deodorizing material containing microorganisms having a biological deodorizing action. A deodorizing device, wherein a water spray device is provided above the packed bed, an inlet for malodorous gas is provided below the packed bed, and an outlet for processing gas is provided above the packed bed.