KR101534830B1 - Method for manufacturing acid or alkali and neuter adsorbents using aluminum by-product, and acid or alkali and neuter adsorbents - Google Patents

Abstract

The present invention relates to a manufacturing method of an absorbent for removing acid or alkaline and neutral sources of offensive odor using an aluminum-based byproduct and an absorbent manufactured by the method. An absorbent for removing offensive odor with an aluminum-based byproduct as an initial material using sludge in water purification and waste sludge, thereby preventing secondary pollution caused by waste treatment of sludge and reducing costs. According to the present invention, a manufacturing method of an absorbent for removing alkaline and neutral sources of offensive odor using aluminum-based byproduct comprises: a first step for manufacturing a granular absorbent comprising a pellet and a sphere with an aluminum-based byproduct as an initial material; a second step for carbonizing as maintaining the absorbent at the temperature in the range of 450-550°C for 15-30 minutes in a vacuum state so as to broaden the specific surface area of the absorbent; and a third step for impregnating at least one from transition metals comprising manganese with the carbonized absorbent.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a method for producing an adsorbent for removing an acidic or alkaline and neutral odor source using an aluminum-based byproduct, and an adsorbent prepared by the method,

The present invention relates to an adsorbent for adsorbing and removing various odor sources. More particularly, the present invention relates to an adsorbent for removing odors by using an aluminum-based by-product using purified water sludge and total phosphorus sludge as a starting material, It is possible to prevent pollution and reduce costs, to prevent the generation of odor and fungi during the production and storage of the adsorbent, and to produce an adsorbent suited to acidic or alkaline and neutral odor sources by using acidic or alkaline And a method for producing an adsorbent for removing a neutral odor source, and an adsorbent produced by the method.

In recent years, research on the recycling of sewage sludge has been actively carried out, and a lot of commercialized technologies have been developed. Such sludge recycling methods include carbonization, composting, and solidification methods. Considering the fact that it is one of the useful treatment methods that can be utilized and it is difficult to secure the land for land acquisition and the stable land acquisition for the small land, the development and practical use of substitute landfill to replace the soil is expected to extend the life of existing landfill and environment It is very important in terms of pollution prevention and economics. In addition, if the precondition for recycling ideal sludge that does not affect the human body and the environment is satisfied, recycling of the sludge in terms of economy and environment is a very important task.

In recent years, various technologies have been proposed for recycling sewage sludge solidified materials as a cover material by adding various solidifying agents to the sewage sludge to solidify them, and Korean Patent Publication No. 2000-25028 Discloses a technique of mixing sewage sludge with gypsum, quicklime, cement, etc. as a special solidifying agent, heating the slurry to 500 ° C or lower and cooling it in the atmosphere as a landfill. However, in the conventional method using cement and quicklime as the solidifying agent as described above, an exothermic reaction occurs in the process of mixing, curing and drying the sewage sludge and additives. Since ammonium ions are converted into ammonia gas due to the increase in pH compared to other methods, And the like.

On the other hand, odor sources originating from inside the house can be caused by the excretion of feed and livestock excreta, and the quality of the feed used for livestock farming by the livestock farmers, the mixing habits of the livestock and mixed manure collection, The odor component can vary depending on the type of the animal, but its main source is corruption of livestock manure. Odor generation is influenced by temperature, humidity, wind, etc. Especially, at low pressure, the air spreads low on the ground, causing a lot of complaints due to the spread of odor in the vicinity, and in winter, It is known that the concentrations of odor-causing substances, especially ammonia, in the housing are considerably high. The occurrence of odor in such an agricultural farm is a major cause of ammonia gas resulting from the decay of simple livestock manure. Since this ammonia gas acts not only on the generation of odor but also on body tissues, particularly mucosal tissues, Not only has a negative effect on the health of the caterers and farmers working at the farm, but also is very bad for the pigs' health in the animals being raised, especially pig farms. In pigs, especially sensitive and fragile young pigs, individuals with bronchial and pulmonary tissues that are weakened as they act directly on the lung tissue and have a detrimental effect on the tracheal epithelium and lung tissues, may be affected by other bacteria, viruses, molds And as a result, there is a problem that economic damage of the farm household due to irritating ammonia is increased.

In addition, there is a problem that the indirect economic loss is increased due to the occurrence of complaints in the surrounding area due to the odor in the industrial complex. Although efforts have been made to reduce atmospheric odors by various methods such as activated carbon, washing, and biofilters, economic burdens and technical difficulties have led to many problems in operating and operating such facilities.

In addition, the Ministry of Environment is currently refining methane gas through anaerobic digestion for the prohibition of marine dumping and direct landfilling such as livestock manure, high concentration organic wastes, and food, and it will be used as an energy substitute. However, at this time, the maximum amount of hydrogen sulfide and ammonia gas is 3000ppm and 2000ppm, respectively, so as to corrode the generator and various pipes and valves to shorten the lifespan. Therefore, the Ministry of Environment has recommended the concentration of hydrogen sulfide in the gas entering the generator to be less than 50ppm. Despite efforts to reduce hydrogen sulphide by using chemical liquid washing method and dry desulfurization tower, economic burden and technical difficulty have caused many problems in operation and operation at the source site.

Recently, the Ministry of Environment recommends lowering the phosphorus concentration of effluent discharged from the wastewater treatment facilities of the four major rivers to 0.5 mg / ℓ or less, and gradually applying them to all underground and wastewater treatment plants in the whole country It is planned. Phosphorus is a very important means of protecting rivers by removing phosphorus as a eutrophication material which is tens of times higher than nitrogen. Conventional microbial removal of phosphorus is difficult to remove to less than 0.5 mg / ℓ. Therefore, a treatment method to solve this problem has been suggested. Among them, the chemical treatment method using the organic aluminum flocculant is a top priority.

Therefore, technologies for purifying the total pollutants that pollute the four major rivers and recycling the sludge generated at the treatment facility after purification to prevent secondary pollution due to sludge treatment and to create economic benefits by utilizing the waste have been proposed For example, Patent Document 1 (Patent No. 1317574) licensed by the present applicant.

Patent Document 1 discloses a process for producing an adsorbent by hydrothermal reaction using an organic substance contained in a total phosphorus sludge and at least one of phosphoric acid and sulfuric acid to produce an adsorbent by using a total phosphorus sludge as a starting material, The organic matter of the sludge reacts with the acid to generate an odor in the adsorbent, and organic matter reacts with moisture when stored for a long period of time to generate fungi and the like, thereby deteriorating the function of the adsorbent, and is manufactured to meet the characteristics of acidic or alkaline and neutral odor source It is possible to remove only some odor sources and not remove the other odor sources.

Patent No. 10-1317574

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made to solve the above problems, and it is an object of the present invention to provide an adsorbent for removing odors by using aluminum-based byproducts using purified water sludge and total phosphorus sludge as starting materials, Adsorbent for removing acidic or alkaline and neutral odor source by using an aluminum based byproduct which can prevent the generation of odor and fungi during the production and storage of the adsorbent and can produce an adsorbent suitable for acidic or alkaline and neutral odor source And to provide an adsorbent produced by the method.

A method for producing an adsorbent for removing an acidic or alkaline and neutral odor source using an aluminum-based by-product according to the present invention comprises the steps of: preparing a granular adsorbent comprising pellets and a spherical body with an aluminum-based by-product as a starting material; The granular adsorbent produced through the first step is maintained in a vacuum state at a temperature of 450 to 550 ° C. for 15 to 30 minutes to carbonize the adsorbent so as to enlarge the specific surface area of the adsorbent to produce an adsorbent for removing alkaline and neutral odor sources A second step; And a third step of introducing at least one transition metal including manganese into the carbonized adsorbent through the second step, thereby producing an adsorbent for removal of an acidic odor source.

According to the method for producing an adsorbent for removing an acidic or alkaline and neutral odor source by using the aluminum-based byproduct according to the present invention and the adsorbent produced by the method, the odor is removed by using an aluminum-based by- product using purified water sludge and total phosphorus sludge It is possible to prevent the secondary contamination due to the disposal treatment of sludge and to reduce the cost. In particular, it prevents the generation of odor and fungi during the production and storage of the adsorbent, thereby preventing the environmental pollution caused by the adsorbent and maintaining the adsorbability And it is possible to remove all odor sources by preparing an adsorbent suitable for an acidic or alkaline and neutral odor source, so that the reliability as an adsorbent for odor removal is improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process diagram of a method for producing an adsorbent for removing an alkaline and neutral odor source using an aluminum-based by-product according to Example 1 of the present invention;
2 is a graph showing adsorption capability of ammonia and trimethylamine gas according to Example 1 of the present invention.
3 to 6 are experimental data showing removal ratios of ammonia, trimethylamine, formaldehyde and toluene according to Example 1 of the present invention, respectively.
7 is a process diagram of a method for producing an adsorbent for removing an acidic odor source using an aluminum-based byproduct according to Embodiment 2 of the present invention.
FIG. 8 is a graph showing an adsorbent for removing an acidic odor source using aluminum-based byproducts according to Example 2 of the present invention and a breakthrough time
9 and 10 are experimental data showing removal rates of hydrogen sulfide and methyl mercaptan using an adsorbent for removing an acidic odor source using an aluminum-based byproduct according to Example 2 of the present invention.

≪ Example 1 >

As shown in FIG. 1, the method for producing an adsorbent for removing alkaline and neutral odor source using the aluminum-based byproduct according to the present embodiment is to produce an adsorbent for removing alkaline and neutral odor sources, For example. The adsorbent is prepared by a hydrothermal reaction-storage and aging-dehydration-drying-crush-molding process.

(S10) hydrothermal reaction.

The starting materials for the preparation of the granular adsorbent are aluminum-based by-products.

The aluminum-based byproducts include sludge generated in a total facility and purified water sludge (constant sludge) generated in the process of drinking water. These sludges include aluminum (Al) and silica (Si) improving the function of the adsorbent have.

Aluminum-based by-products are used to remove phosphorus from the sewage treatment plant, and to coagulate with an aluminum flocculant (PAC, aluminum sulfate) to remove solids after the treatment in the water treatment process (the amount of flocculant to be mixed varies depending on water quality, etc., It is not limited to numerical values).

As the material for eluting aluminum and silica sand from the aluminum-based byproduct, an acidic chemical (pH regulator, sulfuric acid, regenerated sulfuric acid or industrial sulfuric acid, phosphoric acid (H2SO4, KH2PO4, K3PO4, K2HPO4 etc.), hydrochloric acid, nitric acid, ] And process numbers are used. In this embodiment, phosphoric acid and sulfuric acid are exemplified, and only phosphoric acid is used, and phosphoric acid and sulfuric acid are used. In the latter case, the amount of aluminum and silica can be increased by first treating with sulfuric acid, then treating with phosphoric acid, and then eluting the aluminum and silica with sulfuric acid and then treating with phosphoric acid.

The acid product is used in an amount of 2 to 8 parts by weight based on 100 parts by weight of the aluminum-based byproducts, which is an optimum mixing ratio for elution of aluminum and the like. When the sulfuric acid is less than 2%, the elution amount is small. A hydrothermal reactor, a stirrer, and the like can be accompanied by corrosion of the mechanical parts, and the dewatering efficiency in the dewatering process may be lowered and corrosion of the dehydrator may be caused.

2 to 4 parts by weight, preferably 3 parts by weight, of phosphoric acid alone is mixed. When phosphoric acid and sulfuric acid are used together, 2 to 4 parts by weight of sulfuric acid and 2 to 4 parts by weight of phosphoric acid are mixed successively.

The process water is used in an amount of 50 to 200 parts by weight, preferably 100 parts by weight, based on 100 parts by weight of the aluminum-based byproduct, and the mixing ratio relates to the concentration of the acid product, i.e., the pH of the mixture.

100 parts by weight of aluminum-based byproducts, 3 parts by weight of sulfuric acid, and 100 parts by weight of process water were placed in a hydrothermal reactor and the inside of the hydrothermal reactor was maintained at 80 to 110 ° C., preferably 90 ° C. The materials are mixed for 20 to 40 minutes, preferably 30 minutes, while rotating the stirrer at 90 to 110 rpm, preferably 100 rpm. The mixed mixture has optimum conditions to elute the aluminum component while maintaining the pH at about 3-4, and to optimize the reaction with phosphoric acid.

Subsequently, phosphoric acid is added to the hydrothermal reactor (3 parts by weight of phosphoric acid per 100 parts by weight of aluminum by-product) for the production of the adsorbent.

The hydrothermal reactor is subjected to the hydrothermal reaction in the same manner as in the sulfuric acid treatment and the above-mentioned temperature condition and stirring conditions for 1 hour and 30 minutes to 2 hours and 30 minutes. If the temperature condition is maintained below 80 ℃, the reaction time will take more than 5 hours to over-design the electric consumption and the vessel. If the temperature is kept above 110 ℃, the continuous supply of the process water is required. It is necessary to improve processes such as waste. This hydrothermal reaction leads to the formation of porous alumina and sapphire, that is, vesite zeolite, by reacting with the eluted aluminum component and PO ₄ ^- of phosphoric acid.

A hydrothermal reaction product of a honeycomb type is produced by such a by-product and a hydrothermal synthesis reaction of phosphoric acid.

(S20) Storage and aging

The aging condition of the hydrothermal reaction product is aged for about 2 days while maintaining the temperature at 40-50 ° C, and the reaction time of the unreacted product is further maintained to induce the reaction and maintain the temperature, thereby increasing the dehydration efficiency.

(S30) dehydration.

The hydrothermal reactant has a water content of 85 to 90% by weight, and water lowers the deodorizing effect of the offensive odor, so that water is dehydrated through a dehydrator to control the water content of the hydrothermal reaction to 70% by weight or less. The dehydrator can use various products such as a filter press.

(S40).

After the dewatering process, the dehydrated water having the first controlled moisture content is dried to obtain a dried product having a moisture content of 20 to 40% by weight. The drying conditions are both natural drying and mechanical forced drying (110-130 ° C). Since this process is based on the water content of the adsorbent, there is no reason to limit the drying conditions to numerical values, Only.

The water content can be less than 20% by weight, but when the pellet type adsorbent is produced at less than 20% by weight, the shape is broken, and mechanical shaping is difficult. If it is more than 40% by weight, it may be difficult to form the shape with a high water content. The above-mentioned water content is a numerical value for producing a granular adsorbent, and the final produced adsorbent has a water content of less than 10% by weight.

The dewatering and drying by the physical method are advantageous in that the cost for heating is shortened and the time for adjusting the water content is shortened.

(S50).

The dried product after the drying process may be irregular in particle size and may be in the form of a lump, and is subjected to a pulverizing process to produce a powdery adsorbent having a uniform particle size.

The pulverization particle size is 70 to 110 mesh, preferably 100 mesh or less.

(S60).

The preparation of the powdery adsorbent is completed through the entire process and can be stored before the molding process. That is, since powdered adsorbent can be formed after pulverization, the storage process is applied as needed.

(S70) molding.

The granular adsorbent is processed in the form of pellets (∮ 5~7 mm, length 5~10 mm) and bead (∮ 10~15 mm) by using a known pelletizer or the like to prepare a granular adsorbent.

The production of the particulate adsorbent is completed through the above process.

(S80) Carbonization.

The hydrothermal reaction of organic substances, phosphoric acid and sulfuric acid contained in aluminum-based by-products causes odor (odor) due to the acid reaction of the organic material. In the long-term storage, the adsorbent functions poorly due to acidic reaction of water and organic materials.

In the process of manufacturing the granular adsorbent, a carbonization process is performed in order to reduce the odor generated without external factors and increase the adsorption capacity.

The carbonization condition of the particulate adsorbent is a vacuum state (450 to 550 ° C. and 15 to 30 minutes, preferably 500 ° C., 20 minutes in a closed and nitrogen atmosphere).

to be. That is, since the carbonization temperature is a vacuum state, the temperature will change if it is not in a vacuum state.

In vacuum conditions, there is an advantage that the carbonization temperature can be adjusted to a low energy.

The carbonization temperature and time are closely related to each other, and the temperature and time are ranges for increasing the specific surface area without damaging the granular adsorbent by preventing the generation of odor and deterioration due to fungi and the like.

Hereinafter, specific experimental examples and data according to the present invention will be described.

[Experimental Example 1]

30 g of 3% by weight of sulfuric acid (concentration 50%) and 1 kg of 100 weight ratio of process water were added to 1 kg of aluminum-based byproducts disinfected in the water treatment plant at the water treatment plant, And subjected to a pretreatment reaction at 100 rpm for 30 minutes.

30 g of phosphoric acid (H2SO4, KH2PO4, K3PO4, K2HPO4, etc.) in an amount of 3 parts by weight based on 100 parts by weight of the aluminum-based byproduct was added, and the mixture was hydrothermally reacted for 2 hours with stirring to form porous particles.

The porous particles were dewatered to a degree of 55% by weight or less by a dehydrator, dried to a moisture content of about 40% by weight through a drier (heater), ground by a ball mill and then pelletized in the form of pellets 5 to 7 mm in length and 5 to 10 mm To prepare a granular adsorbent (a bead type adsorbent was also prepared by the same method).

The particulate adsorbent was retained at 500 ° C in anoxic condition for 20 minutes to activate residual organic matter through carbonization and enlarge the specific surface area. The final produced adsorbent has a water content of less than 10% by weight.

The adsorbent (DEN-1000) produced by this embodiment removes ammonia, trimethylamine, formaldehyde, and toluene, which are neutral and alkaline odor-inducing substances.

Ammonia and trimethylamine removal efficiencies of the adsorbent of the present embodiment and activated carbon (a commercial product sold as a comparative example) were tested. The results are as follows.

The adsorbent used was a pellet type with a diameter of 5 mm and a length of 5 to 7 mm and two types of beads, and 200 g of each of the adsorbents of the present invention was used by being drawn into an acrylic material column having a diameter of ∮50 mm and a depth of 30 mm. At this time, about 50 ppm of ammonia gas and 50 ppm of trimethylamine gas were passed through the adsorbate at a rate of 2 L / min. The gas concentration of the air passing through the adsorbent was then measured through a gas detector.

As shown in FIG. 2, the breaking point of the activated carbon (A / C) of the comparative example was 320 min, while the breakage point of the bead type adsorbent and the pellet type adsorbent of the present example was 1,140 min , And 820 min, respectively, indicating that the adsorption capacity of the activated carbon (A / C) is increased by about 3 to 4 times. The adsorption capacity of the bead-type adsorbent is higher than that of the pellet-type adsorbent because the adsorption capacity of the bead-type adsorbent is higher than that of the adsorbent of the pellet type. As shown in FIG. 2, it was confirmed that the trimethylamine adsorption capacity of the present example is superior to that of the activated carbon of the comparative example.

In the case of activated carbon (A / C), the alkaline odor such as ammonia or trimethylamine is polarized by the surface physical adsorption to the ammonium salt or the amine salt and the phosphoric acid impregnation by the Vander Waals Force, -33 ° C) or trimethylamine (3 ° C). In the case of the bead type adsorbent and the pellet type adsorbent of the present embodiment, aluminum elution by surface adsorption and phosphoric acid addition and phosphoric acid ion (PO ₄ ^3- ) It was concluded that the physico - chemical adsorption of pores (micropores) occurred simultaneously with the formation of Hexagon - type AlPO ₄ adsorbents formed by irreversible reaction with.

[Experimental Example 2]

Ammonia, trimethylamine, formaldehyde, toluene and the like were tested with the adsorbent prepared by the above-mentioned method to the Korea Research Institute of Chemical Technology (KFTC), and it was found that the removal efficiency was 99% or more within 30 minutes 6).

≪ Example 2 >

As shown in FIG. 7, the method for producing an adsorbent for removing an acidic odor source using the aluminum-based byproduct according to the present embodiment is to produce an adsorbent for removing an acidic odor source, And a step of attaching a transition metal containing manganese. The step of attaching the transition metal adsorbs and removes acidic odor sources (sulfur compounds, hydrogen sulfide, methyl mercaptan, etc.).

In this embodiment, the granular adsorbent production steps (S10 to S70) and the carbonization step (S80) are the same as those of the first embodiment, and thus a detailed description thereof will be omitted.

The transition metal includes manganese, copper, lead and the like, preferably KMnO ₄ , MnCl ₂ .

The transition metal is used in a mixture of 3 to 7 parts by weight of the carbonized adsorbent and 10 to 20 parts by weight of water, preferably 5 parts by weight of the transition metal and 15 parts by weight of water.

And the adsorbent is immersed in the solution (mixed liquid of transition metal and water) so that the transition metal is adhered to the adsorbent.

The immersing conditions of the adsorbent may be a method of immersing at 8 to 12 atm for 20 to 40 minutes, a method of immersing at 10 to 12 hours at atmospheric pressure, or the like.

[Experimental Example 1]

30 g of 3% by weight of sulfuric acid (concentration 50%) and 1 kg of 100 w / w of process water were added to 1 kg of aluminum-based byproducts (agglomerated with aluminum flocculant) disposed of at the water treatment plant and the mixture was stirred using a stirrer And subjected to pretreatment reaction at 100 rpm for 30 minutes.

30 g of phosphoric acid (H2SO4, KH2PO4, K3PO4, K2HPO4, etc.) was added in an amount of 3 parts by weight based on 100 parts by weight of the aluminum-based byproduct, and the mixture was hydrothermally reacted for 2 hours with stirring to form porous particles.

The porous particles were dewatered to a degree of 55% by weight or less by a dehydrator, dried to a moisture content of about 40% by weight through a drier (heater), ground by a ball mill and then pelletized in the form of pellets 5 to 7 mm in length and 5 to 10 mm To prepare a granular adsorbent (a bead type adsorbent was also prepared by the same method).

The particulate adsorbent was retained at 500 ° C in anoxic condition for 20 minutes to activate residual organic matter through carbonization and enlarge the specific surface area.

Prepare the solution by dissolving KMnO ₄ , MnCl ₂ (5% by weight of the adsorbent) in water (15% by weight of the adsorbent), and add the adsorbent prepared in the previous step to the solution so that the manganese ions are adsorbed for 10-12 hours Lt; / RTI > In another method, 5 parts by weight of KMnO ₄ and 15 parts by weight of water are mixed in 100 parts by weight of a carbonized adsorbent in a pressure vessel for maintaining a pressure of 10 atm and reacted for about 30 minutes to adhere manganese ions to the carbonized adsorbent.

The desiccant (DES-100), which is the final product thus dried, becomes an adsorbent capable of removing sulfur compounds and the like, which are acidic odor-inducing substances.

[Experimental Example 1]

The hydrogen sulfide removal efficiency of the adsorbent of the present embodiment was compared with that of activated carbon and iron oxide, and the results are shown in the following figure.

The adsorbent of this example was a pellet type adsorbent having a diameter of 5 mm and a length of 5 to 7 mm as a powdery adsorbent sample.

A column equipped with a stainless steel net having a diameter of ∮50 mm and a depth of 30 mm and having a stainless steel net on each of upper and lower portions was prepared and 200 g of the pellet type adsorbent was introduced into the column. At this time, about 1,000 ppm of hydrogen sulfide standard gas was passed at a rate of 0.5 L / min. Then, the air passed through the filter was measured for gas concentration using a gas detection tube. For comparison of this experimental example, existing activated carbon and iron oxide were placed in an acrylic column under the same conditions.

Approximately 1,000 ppm hydrogen sulfide standard gas (N ₂ balance) was passed through the adsorbent at 0.5 L / min. As a result of this experiment, when the breakthrough time of hydrogen sulfide was detected to be about 5% based on the initial concentration, when the iron oxide and activated carbon and the pellet type adsorbent (DES-1000) of this example were compared by the same method, (See FIG. 8). As a result, it is believed that the present invention has potential to replace activated carbon and iron oxide depending on imports (see FIG. 8).

[Experimental Example 2]

The adsorbent of this example was subjected to a test of hydrogen sulfide, methyl mercaptan, and the like by the Korea Institute of Mining and Materials (MOCIE), which is a public agency, and showed a removal efficiency of 99% or more within 30 minutes (see FIGS. 9 and 10).

Claims (8)

A first step of preparing a granular adsorbent having any one of pellet and spherical shapes using an aluminum-based by-product as a starting material;
A second step of carbonizing the particulate adsorbent produced through the first step so as to expand the specific surface area of the adsorbent by maintaining the temperature at 450 to 550 ° C. for 15 to 30 minutes in a vacuum state;
And a third step of introducing at least one selected transition metal among the transition metals into the carbonated adsorbent through the second step. [3] The method of claim 1, wherein the third step comprises: immersing the carbonized adsorbent in a solution obtained by mixing 3 to 7 parts by weight of transition metal and 10 to 20 parts by weight of water with respect to 100 parts by weight of the adsorbent carbonized through the second step, Wherein the transition metal is impregnated with an aluminum-based by-product. [Claim 3] The method of claim 2, wherein the carbonized adsorbent is reacted at 8 to 12 atm for 20 to 40 minutes. [3] The method of claim 2, wherein the carbonized adsorbent is reacted at atmospheric pressure for 10 to 12 hours in the third step. A first step of preparing a granular adsorbent, which is selected from the group consisting of pellets and spheres, as an aluminum-based by-product starting material;
And a second step of carbonizing the particulate adsorbent produced through the first step in a vacuum state at 450 to 550 ° C. for 15 to 30 minutes to prevent the generation of odor and expand the specific surface area of the adsorbent,
In the first step, 2 to 8 parts by weight of at least one of phosphoric acid and sulfuric acid and 50 to 200 parts by weight of process water are mixed with 100 parts by weight of the aluminum-based byproduct aggregated with the flocculant solution sludge or the total sludge, For 30 minutes to 2 hours and 30 minutes, a step 1-1 of dehydrating the hydrothermal reaction product produced in the step 1-1 and drying the resultant to adjust the water content to 20 to 40% by weight , A step 1-3 of grinding the dry matter whose moisture content is controlled through the step 1-2, the step of grinding the pulverized material through the step 1-3, the granular material being in the form of pellets or spheres, The method comprising the step of: (1) preparing an adsorbent for removing an alkaline and neutral odor source using an aluminum-based by-product. [2] The method of claim 1, wherein the first step comprises mixing 2-8 parts by weight of at least one of phosphoric acid and sulfuric acid and 50-200 parts by weight of process water with respect to 100 parts by weight of aluminum-based byproducts aggregated with an alcohol- And a hydrothermal reaction at 80 to 110 ° C for 30 minutes to 2 hours and 30 minutes. The hydrothermal reaction product produced in the step 1-1 is dehydrated and dried to adjust the water content to 20 to 40% by weight Step 1 - Step 1 - Step 1-3 of pulverizing the dry matter whose moisture content is controlled through Step 1 - 2, Step 1 - 3 of grinding the pulverized material through any one of pellet and sphere Wherein the adsorbent is selected from the group consisting of alumina, zeolite, zeolite, zeolite, zeolite, zeolite, and zeolite. An adsorbent for removing an acidic odor source using an aluminum-based by-product, which is produced according to claim 1. An adsorbent for removing an alkaline and neutral odor source using an aluminum-based by-product, which is produced according to claim 5.

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