KR101515151B1 - Water treatment agent and the method thereof - Google Patents

Abstract

The present invention relates to a water treatment agent and a method for producing the same, the method comprising: preparing a raw material and a solvent; Introducing the raw material into the solvent to extract an effective ingredient contained in the raw material; Hydrolyzing the extracted active ingredient; Reducing the hydrolyzed active ingredient to polymerize the hydrolyzed active ingredient; And a step of stabilizing the polymerized active ingredient, so that various kinds of contaminants present in the waste water can be removed.

Description

The present invention relates to a water treatment agent and a method for producing the same,

The present invention relates to a water treatment agent and a method for producing the same, and more particularly, to a water treatment agent for removing various kinds of contaminants present in wastewater and a method for producing the same.

Currently, the problems caused by pollution of lakes and rivers are becoming a big social issue, and as the progress of industrialization and urbanization progresses, the severity of these problems becomes more serious and various water treatment methods are proposed to solve them.

Among them, water treatment methods using standard activated sludge method, ie, microbiological treatment method, have been studied extensively. However, it has been found that COD (chemical oxygen demand), total nitrogen compound (TN), total phosphorus compound , Chromaticity and so on at the same time, and there is a disadvantage that it is not economical due to an excessive investment in the treatment facility.

Accordingly, a water treatment method for coagulating and precipitating floating colloidal substances and other contaminants contained in wastewater by introducing aluminum sulfate, aluminum chloride, ferric chloride, organic coagulant and auxiliary coagulant into the wastewater is mainly used . Among these flocculants, aluminum flocculants such as aluminum sulfate and polychlorinated aluminum are mainly used for wastewater treatment. However, the aluminum-based coagulant may cause a secondary contamination problem because the soluble aluminum remains in the treated water due to the organic acid produced in the wastewater treatment. In addition, the aluminum flocculant must be used excessively because the flocculation performance is deteriorated at low temperatures, which leads to an increase in the amount of soluble aluminum remaining in the treated water, an increase in the cost of expensive raw materials and manufacturing processes, .

It is also difficult to efficiently remove BOD (Biochemical oxygen demand), COD (chemical oxygen demand), TN, TP, SS (suspended solids), heavy metals, odor, and chromaticity simultaneously in various wastewater treatment systems such as coagulant .

(Patent Document 1) KR 2002-0090157 A1 (Patent Document 1) KR 2002-0090157 A1

The present invention relates to a multifunctional Al-Fe / Mg-Al-based catalyst capable of efficiently removing BOD (Biochemical oxygen demand), COD (Chemical Oxygen Demand), TN, TP, SS (suspended solids), heavy metals, odors, Si-based water treatment agent and a process for producing the same.

The present invention provides a water treatment agent capable of suppressing environmental pollution using environmentally friendly raw materials and a method for producing the same.

The present invention provides a water treatment agent capable of reducing the manufacturing cost and a method for producing the same.

A method of manufacturing a water treatment agent according to an embodiment of the present invention includes the steps of preparing a raw material and a solvent; Introducing the raw material into the solvent to extract an effective ingredient contained in the raw material; Hydrolyzing the extracted active ingredient; Reducing the hydrolyzed active ingredient to polymerize the hydrolyzed active ingredient; And stabilizing the polymerized active ingredient.

The raw material may be a red mud or clay containing at least one of aluminum (Al), iron (Fe), magnesium (Mg), and silica (Si).

The clay may be at least one of borocite, loess, bentonite, kaolin and acid clay.

Extracting the active ingredient from the raw material by adding an acidic solution while stirring the raw material in distilled water; And separating the first filtered water and the residue from the extracted effective component.

Washing the residue with washing water to extract an active ingredient from the residue; Separating the second filtered water from which the effective component is extracted and the residue; And mixing the first filtered water and the second filtered water at least once.

The acid solution may be at least one of sulfuric acid and hydrochloric acid.

The active ingredient may be at least one of aluminum, iron, magnesium, and silica.

(Al ₂ (SO ₄ ) ₃ ), ferrous sulfate (FeSO ₄ ), magnesium sulfate (MgSO ₄ ), aluminum chloride (AlCl ₃ ), ferric chloride (FeCl ₃ ) And magnesium chloride (MgCl ₂ ) can be produced.

The active ingredient additive may be added to the solution obtained by mixing the first filtered water and the second filtered water with the active ingredient extracted in the mixed solution.

The active ingredient additive may contain at least one of aluminum, iron, silicon, and magnesium.

The composition of the final active ingredient contained in the mixed solution is 40 to 80 wt% of aluminum oxide (Al ₂ O ₃ ), 5 to 30 wt% of iron oxide (Fe ₂ O ₃ ), 1 to 5 wt% of silicon dioxide (SiO ₂ ) (MgO) of 5 to 30 wt%.

The hydrolysis may be performed by adding any one of sodium hydroxide (NaOH), sodium carbonate (Na ₂ CO ₃ ), and sodium hydrogen carbonate (NaHCO ₃ ) to the mixed solution.

At least one of sodium hydroxide (NaOH), hydrogen peroxide (H ₂ O ₂ ), sodium carbonate (Na ₂ CO ₃ ) and sodium hydrogencarbonate (NaHCO ₃ ) may be used as a reducing agent in the reduction process.

The aluminum-silicate-based polymer material may be produced during the reduction process.

The polymeric material may have a molecular weight of 100,000 to 500,000.

In the stabilization process, at least one of polyacrylamide, sodium alginate, carboxymethylrulyose (CMC), and polyethylene oxide may be used as a stabilizer.

The concentration of the stabilizer may be 0.05 wt / v% to 0.5 wt / v%.

In the stabilization process, the aluminum-silicate material and the metal hydrate are bonded to each other to produce an Al-Fe / Mg-Si-based water treatment agent.

The water treatment agent produced by the above-described method may have a concentration of the active ingredient in the water treatment agent of 8 wt / v% to 25 wt / v%.

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The water treatment agent and the manufacturing method thereof according to the embodiment of the present invention can produce a water treatment agent using natural raw materials such as clay and red mud. Thus, it is possible to suppress the secondary environmental pollution by the wastewater treatment and to reduce the cost of manufacturing the water treatment agent.

In addition, the water treatment agent prepared according to the embodiment of the present invention has odor and chromaticity as well as organic matters (BOD, COD), total nitrogen (TN), total phosphorus (TP), suspended solids And has multi-functionality that can be efficiently removed. Furthermore, the water treatment agent is not limited to the wastewater treatment but can be used for various purposes such as a heavy metal removing agent, a green tide and a red tide removing agent, a deodorant, a soil improving agent, a paper filling agent and an antibacterial agent.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart showing a process of manufacturing a water treatment agent according to an embodiment of the present invention; FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know. Wherein like reference numerals refer to like elements throughout. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as not to obscure the subject matter of the present invention.

The water treatment agent according to the embodiment of the present invention is an Al-Fe / Mg-Si water treatment agent produced by using natural materials such as clay and red mud. The water treatment agent is an organic substance, total nitrogen compound, total phosphorus compound, heavy metal, odor, Can be removed at the same time.

1 is a flow chart showing a process of manufacturing a water treatment agent according to an embodiment of the present invention.

Referring to FIG. 1, the process of preparing a water treatment agent includes a step S110 of extracting an active ingredient contained in a raw material by putting a largely prepared raw material into a solvent, a step S140 of hydrolyzing the extracted active ingredient, (S150) of reducing and hydrolyzing the hydrolyzed active ingredient and stabilizing the macromolecular active ingredient (S160).

First, a raw material is prepared (S100). Clay or red mud containing a large amount of Al ₂ O ₃ and FeO as main components of the water treatment agent may be used as the raw material. The clay may be bauxite, loess, bentonite, kaolin and acid clay. Red mud may be an undersea deposit composed of hydrous silicate aluminum, quartz, iron oxide, rock crushed particles, foraminifera, or calcined calcareous harmful materials. In the aluminum smelting industry, it may be an insoluble residue after alumina powder is extracted by dissolving bauxite as caustic soda have. These raw materials may be used alone or in combination of two or more.

In general, the chemical composition of the clay is silicon dioxide (SiO ₂ ) 46.01%, aluminum oxide _{(Al 2 O 3) 29.93%} , iron oxide _{(Fe 2 O 3) 1.06%} , titanium dioxide (TiO ₂₎ 2.39%, manganese (MnO) 0.03% oxidation, calcium (CaO) 11.38% oxide, It can be composed of 7.61% of magnesium (MgO), 0.56% of potassium oxide (K ₂ O), 0.60% of sodium oxide (Na ₂ O) and 1.43% of phosphoric pentoxide (P ₂ O ₅ ) Can change. And the chemical composition of the red mud is silicon dioxide (SiO ₂₎ 13.27%, aluminum oxide _{(Al 2 O 3) 16.15%} , iron oxide _{(Fe 2 O 3) 45.48%} , titanium dioxide (TiO ₂₎ 10.46%, manganese (MnO) 0.06% oxidation, calcium (CaO) 7.70% oxide, 0.34% of magnesium (MgO), 0.27% of potassium oxide (K ₂ O), 5.89% of sodium oxide (Na ₂ O), and 0.39% of phosphorus pentoxide (P ₂ O ₅ ). Further, the beam chemical composition of the oak site is silicon dioxide (SiO ₂₎ 8.06%, aluminum oxide _{(Al 2 O 3) 54.53%} , iron oxide _{(Fe 2 O 3) 10.20%} , titanium dioxide (TiO ₂₎ 2.53%, other 24.68 %.

As a result, it can be seen that the clay contains a large amount of silicon dioxide, the red mud contains iron oxide, and the bauxite contains a large amount of aluminum oxide. The raw material used in the embodiment of the present invention has 10 to 50% of an aluminum oxide component, 10 to 30% of an iron oxide component, 5 to 10% of a silicon dioxide component, 1 to 6% of a titanium dioxide component, Clay and red mud containing 10 to 30% manganese component may be used. Such raw materials can be used by drying in a dry oven for a certain period of time.

When the raw material is prepared, the active ingredient contained in the raw material as described above is extracted. Extraction of the active ingredient can be carried out through an acidification reaction.

First, a solvent for extracting the active ingredient is prepared. As the solvent, distilled water and an acidic solution may be used. As the acidic solution, 98 wt% concentrated sulfuric acid (CH ₂ SO ₄ ) and 35 wt% concentrated hydrochloric acid (C-HCl) can be used, or they can be used alone or in combination. In the case of mixing them, a mixed acid of 98 wt% sulfuric acid (H ₂ SO _{4 )} / 35 wt% hydrochloric acid (HCl) = 1 may be used.

When a solvent is prepared, a predetermined amount of distilled water is put into a container, and the raw material is added while stirring. At this time, distilled water may be heated to about 60 to 80 DEG C before the introduction of the raw material to facilitate the extraction of the active ingredient. The raw material is preferably about 10 wt% to 30 wt%, more preferably about 15 wt% to 20 wt% with respect to the weight of the solvent. This is because when the raw material is less than 10 wt%, the concentration of the final active ingredient is low, which is uneconomical. When the amount of the raw material is more than 30 wt%, the viscosity of the raw material is increased to cause stirring problems. When the raw material is charged as described above, the acidic solution is dropped into the separating funnel for 1 to 4 hours and reacted to extract the active ingredient in the raw material (S110). As the reaction progresses, the temperature of the solution rises to about 90 to 120 ° C by the dilution and the reaction heat, and the active ingredient can be extracted smoothly through the dilution and the reaction heat thus generated. The remaining heat after the reaction is recovered and used to preheat the distilled water for extracting the raw material, thereby reducing the energy cost of producing the water treatment agent. At this time, the final temperature of the solution is preferably about 110 to 120 ° C. If the reaction time is less than 1 hour, the reaction is smooth and the reaction product may be present. If the reaction time is more than 4 hours, It is uneconomical.

The following Reaction Schemes 1 to 6 are representative chemical reaction formulas that take place during the extraction of the active ingredient.

[Reaction Scheme 1]

Al ₂ O ₃ + H ₂ SO ₄ → Al ₂ (SO ₄ ) ₃ + 3H ₂ O

[Reaction Scheme 2]

Fe ₂ O ₃ + H ₂ SO ₄ → 2FeSO ₄ + 2H ₂ O + 1/2 O ₂

[Reaction Scheme 3]

MgO + H ₂ SO ₄ → MgSO ₄ + H ₂ O

[Reaction Scheme 4]

Al ₂ O ₃ + 6HCl → 2AlCl ₃ + 3H ₂ O

[Reaction Scheme 5]

Fe ₂ O ₃ + 6HCl → 2FeCl ₃ + 3H ₂ O

[Reaction Scheme 6]

MgO + 2HCl - > MgCl ₂ + 2H ₂ O

An active ingredient such as aluminum oxide (Al ₂ O ₃ ), iron oxide (Fe ₂ O ₃ ), and magnesium oxide (MgO) contained in the raw material in Reaction Schemes 1 to 6 is dissolved in an acidic solution containing at least one acid selected from sulfuric acid and hydrochloric acid (Al ₂ (SO ₄ ) ₃ ), ferrous sulfate (FeSO ₄ ), magnesium sulfate (MgSO ₄ ), aluminum chloride (AlCl ₃ ), ferric chloride (FeCl ₃ ) and magnesium chloride (MgCl ₂₎ is extracted as a monohydrate.

Thereafter, when the reaction between the active ingredient and the acidic solution is completed, the solution is firstly filtered with a filter to separate the primary filtered water and the primary residue (S120).

The separated primary residues are washed with wash water (distilled water), the raw material is added to the washed solution, and the acid solution is dropped and reacted at least once. At this time, the washing water may be preheated to a temperature of about 60 to 80 ° C, and the washing water may be preheated by direct heating or by using a previously recovered reaction heat. And the amount of wash water is 1 to 2 times the amount of the primary residues. In the case where the washing process is further carried out, about 5 to 10 times of the secondary residues generated after the first washing can be used.

Then, when the reaction is completed, the solution is filtered with a filter to separate the secondary filtration water and the secondary residue (S122), and the secondary filtration water is mixed with the primary filtration water. The active ingredient additive is added to the filtered water mixed with the primary and secondary filtered water (S130). The active ingredient additive may be extracted from clay, or may be a commercially available product. Active ingredient additives may include aluminum, iron, silicon, magnesium, and the like. The aluminum component may be extracted from bauxite, kaolin, acid clay and red mud, iron components may be extracted from red mud, bauxite and loess, and the silicon component may be bentonite, kaolin, Clay and the like. In addition, the magnesium component may be extracted from yellow clay and acidic clay, but its extraction effect is low and a separate additive for adding the magnesium component may be used. The water treatment agent according to the embodiment of the present invention can improve the effect of removing malodor due to the magnesium component acting as an active ingredient unlike the conventional water treatment agent. The magnesium ingredient additive is magnesium sulfate (MgSO ₄ ), magnesium chloride (MgCl ₂ ) And magnesium nitride (Mg (NO ₃ ) ₂ ).

In addition, component additives of other active ingredients other than magnesium may be added. Aluminum component additive is aluminum hydroxide (Al (OH) _3), aluminum dross and aluminum metal is at least and one or more may be used, iron additive of ferrous sulfate (FeSO _4), ferric sulfate (Fe ₂ ( SO ₄ ) ₃ , ferrous chloride (FeCl ₂ ) and ferric chloride (FeCl ₃ ), and the silicon component additive may be an aqueous solution of sodium silicate (Na ₂ O.nSiO ₂ ) .

Such a replenishment of the active ingredient in the filtrate aluminum compositions oxidation of the final active ingredient contained in the filtrate (Al ₂ O ₃₎ 40 to 80wt%, iron oxide (Fe ₂ O ₃₎ 5 to 30wt%, silicon dioxide (SiO ₂₎ 1 to 5 wt%, and magnesium oxide (MgO) 5 to 30 wt%.

(Al ₂ (SO ₄ ) ₃ ), ferrous sulfate (FeSO ₄ ), magnesium sulfate (MgSO ₄ ), aluminum chloride (MgSO ₄ ), and the like are added to the filtered water. (AlCl ₃ ), ferric chloride (FeCl ₃ ), and magnesium chloride (MgCl ₂ ) (S140). At this time, at least one of sodium hydroxide (NaOH), sodium carbonate (Na ₂ CO ₃ ) and sodium hydrogencarbonate (NaHCO ₃ ) may be used. The hydrolysis reaction is preferably carried out at a temperature of about 60 to 90 ° C., and the reaction time is preferably about 2 to 6 hours. The active ingredients in the filtered water are hydrolyzed under the reaction shown in the following reaction formulas 7 to 10. The following Reaction Schemes 7 and 8 are representative chemical reaction formulas of aluminum compounds and Reaction Formulas 9 and 10 are representative chemical formulas of iron and magnesium compounds.

[Reaction Scheme 7]

_{Al 2 (SO 4) 3 +} 6NaOH → Al (OH) ₃ + 3Na ₂ SO ₄

[Reaction Scheme 8]

_{2Al (OH) 3 + Al 2} (SO 4) 3 → Al ₄ (OH) ₆ (SO ₄ ) ₃

[Reaction Scheme 9]

Fe ₂ (SO _{4) 3} + 6NaOH → 2Fe (OH) ₃ + 3Na ₂ SO ₄

[Reaction Scheme 10]

MgSO ₄ + 2NaOH → Mg (OH) ₂ + Na ₂ SO ₄

In the above reaction formulas 7 to 10, the monomolecular hydrolysis reaction may proceed according to the number of moles of alkali. In addition, the resulting monomolecular compounds may react with the metal salt to proceed the hydrolysis reaction. Thus, each of the active moieties can proceed from a monomolecular to a multimeric species, resulting in a polymerisation reaction. In the process of polymerizing the active ingredients as described above, sodium silicate (Na ₂ O.nSiO ₂ ) and silicon tetraoxide (Si (OH) ₄ ) can be used as a silicon component providing source. It reacts with the aluminum polymer material and is converted into a polymer material with a more stable structure. The following reaction formula 11 is a chemical reaction formula.

[Reaction Scheme 11]

_{8Al 2 (SO 4) 3 +0.2} (SiO 2 and nNa ₂ O) + 12H ₂ O

_{→ 4Al 4 (OH) 6 (} SO 4) 2.94 (SiO 2 .31) 0.2 + 3.06Na 2 SO 4

In addition, the following structural formula is a structural formula of a component that can be formed by a hydrolysis process and a polymerization process of an extracted active ingredient. The component having such a structure may have the effect of removing sedimentation property and washing property. Particularly, it has excellent effect of removing organic matter and has excellent flocculation performance in low temperature water treatment.

The resulting component may be an aluminum-silicate polymer material as shown in Reaction Scheme 11 and has a structure as shown in the following structural formula.

[constitutional formula]

The aluminum-silicate polymer material may have a molecular weight of about 100,000 to 500,000, and more preferably about 200,000 to 300,000.

Once the hydrolysis and polymerisation process is complete, a reducing agent is added to the filtered water to reduce the hydrolyzed components (S150). At this time, at least one of sodium hydroxide (NaOH), hydrogen peroxide (H ₂ O ₂ ), sodium carbonate (Na ₂ CO ₃ ) and sodium hydrogencarbonate (NaHCO ₃ ) may be used as the reducing agent. The reduction process may be carried out in the range of pH 0.5 to pH 3, more preferably in the range of pH 1 to pH 2. The reaction temperature is preferably about 60 to 90 占 폚, and the reaction time is preferably about 2 to 6 hours.

Thereafter, a dispersant is added to the filtered water, and the resulting polymer is combined with iron and magnesium hydrate, for example, a metal hydrate is coated on the polymer material to obtain a water treatment agent (S160). As the dispersing agent, any one of polyacrylamide, sodium alkoxylate, carboxymethylcellulose (CMC) and polyethylene oxide may be used, and the concentration thereof may be about 0.05 to 0.5 wt / v% or more, 0.02 to 0.03 wt / v% is suitable. In the course of stabilization, ions of at least one of SO ₄ ^{2 -} and Cl ^- as well as iron and magnesium of about 1 to 20 nm are bonded to the polymer material to obtain an Al-Fe / Mg-Si water treatment agent.

The following Reaction Schemes 12 to 14 are representative reaction schemes that occur during the stabilization of the active ingredients.

[Reaction Scheme 12]

Al ₂ (SO ₄ ) ₃ + 6H ₂ O → Al ₄ (OH) ₆ (SO ₄ ) ₃ + 3H ₂ SO ₄

[Reaction Scheme 13]

5FeSO ₄ + 2H ₂ SO ₄ + 5/2 H ₂ O ₂ → Fe ₅ (OH) (SO ₄ ) ₃ 7+ 3 H ₂ O

[Reaction Scheme 14]

5MgSO ₄ + 2H ₂ SO ₄ + 5/2 H ₂ O ₂ → Mg (OH) (SO ₄ ) ₇ + 3 H ₂ O

The water treatment agent produced by such a method may exist in a liquid state or a powder state.

When the water treatment agent is in a liquid state, it may contain an active ingredient having a water treatment function and a dispersion medium. The active ingredient includes aluminum monoxide (Al ₂ O ₃ ), iron oxide (Fe ₂ O ₃ ), silicon dioxide (SiO ₂ ) and magnesium oxide (MgO), and the dispersion medium includes water. The active ingredients have a nanoparticle size (e.g., spherical particles having a diameter of 9 nm), and the effect of the water treatment agent may vary depending on the active ingredient.

On the other hand, in order to obtain a powdered water treatment agent, the liquid water treatment agent may be evaporated in the liquid water treatment agent.

The water treatment agent thus prepared is not limited to water treatment but can be used as a heavy metal removing agent, a green tide and a red tide removing agent, a deodorant, a soil improving agent, a paper filling agent, an antibacterial agent and the like.

Hereinafter, the present invention will be described in more detail with reference to examples. However, these examples are for illustrating the present invention and the scope of the present invention is not limited thereto.

Table 1 below shows the amounts of raw materials and solvents used in Examples 1 to 13 and Comparative Examples 1 and 2. As shown in Table 1, the amounts of the raw materials and the solvents used in the respective Examples are different from each other, but the manufacturing method of the water treatment agent using the same is the same.

Raw material (g) Solvent (g) Example 1 The bauxite (200) 95 wt% sulfuric acid (380) Example 2 Red mats (200) 95 wt% sulfuric acid (348) Example 3 The bauxite (100) / red mite (100) 95 wt% sulfuric acid (380) Example 4 The bauxite (50) / red mud (150) 95 wt% sulfuric acid (380) Example 5 Red mud (150) / bentonite (50) 95 wt% sulfuric acid (348) Example 6 Red mud (150) / Acid clay (50) 95 wt% sulfuric acid (348) Example 7 Red mats (150) / Kaolin (50) 95 wt% sulfuric acid (348) Example 8 Red mud (150) / aluminum dross (50) 95 wt% sulfuric acid (348) Example 9 Red (150) / Al (OH) ₃ (50) 95 wt% sulfuric acid (348) Example 10 The bauxite (200) 35 wt% hydrochloric acid (400) Example 11 The bauxite (100) / red mite (100) 35 wt% hydrochloric acid (400) Example 12 Red mud (150) / aluminum dross (50) 35 wt% hydrochloric acid (400) Example 13 The bauxite (200) 95 wt% sulfuric acid (380) Comparative Example 1 Al (OH) ₃ (167) 95 wt% sulfuric acid (314) Comparative Example 2 Poly aluminum chloride (PAC)

[Example]

In a four-necked round flask, 200 g of the raw material dried in a dry oven at 120 ° C. for 8 hours and 200 ml of distilled water are put together and mixed by stirring. The mixed solution was heated to 60 ° C, and then charged into a 380 g concentrated 95 wt% sulfuric acid solution or 348 g flask over a period of about 1 hour with a separating funnel to react with the mixed solution. At this time, when the temperature of the mixed solution rises to 110 캜 by the reaction heat, the state is maintained for about 4 hours and then cooled to 80 캜. Thereafter, the mixed solution is filtered under reduced pressure to separate the solution and the residue. The resulting residue is washed with distilled water (100 ml) and filtered again under reduced pressure. 474 g of the thus obtained clear reddish brown solution is put into a new four-necked round flask. Then it added additional distilled water 300㎖ the flask and the magnesium component additives of MgSO _{4 ·} 7H ₂ O (Samchun Pure Chemical Co., content of 99% reagent) is added to 102g. Thus, the active ingredient can be extracted from the raw material and the active ingredient additive.

Thereafter, the solution is heated to 80 DEG C, and then the pH is adjusted to 1.0 by adding 20 wt% of sodium hydroxide (NaOH) solution and maintained for 4 hours. Then, 50 g of a 10 wt% sodium oxide (Na ₂ O) solution and a silicon dioxide (SiO ₂ ) solution are dropped and reacted.

Subsequently, 100 ml of a 0.5 wt% polyacrylamide solution was added thereto, and slowly added dropwise until the pH range reached 1.5 by using a 20 wt% sodium hydroxide solution. Then, the mixture was maintained at 80 ° C for 4 hours, Lt; / RTI > and supplemented with distilled water to 1 liter. The physical properties thereof were measured and the results are shown in Table 2.

[Comparative Example 1]

167 g of aluminum hydroxide dried in an oven at 120 deg. C for 8 hours and 200 ml of distilled water are put into a four-necked round flask and stirred. Subsequently, this solution was heated to 60 DEG C, and 314 g of 95 wt% sulfuric acid was added dropwise through the top of the flask to the separating funnel over about 1 hour. At this time, when the inside temperature of the flask is elevated to 110 캜 by the reaction heat, it is maintained at 110 캜 for 4 hours and then cooled to 80 캜. Then, the solution was filtered under reduced pressure, and the remaining residue was washed with 100 ml of distilled water. Then, 474 g of the resulting reddish brown clear solution was added to a four-necked round flask, and 300 ml of distilled water was added thereto. While stirring, FeSO ₄ .7H ₂ O Chemical products, industrial use) and 102.8 g of MgSO ₄揃 7H ₂ O (pure tertiary chemicals, 99.2% special grade reagent). Accordingly, the active ingredient can be extracted from the clay and the active ingredient additive.

Thereafter, the mixture is heated to 80 DEG C and then adjusted to pH 1.0 by adding 20 wt% of sodium hydroxide (NaOH) solution and maintained for 4 hours. Then, 50 g of a 10 wt% sodium oxide (Na ₂ O) solution and a silicon dioxide (SiO ₂ ) solution are dropped and reacted.

Thereafter, 100 ml of a 0.5 wt% polyacrylamide solution was added thereto, and slowly added dropwise until the pH range reached 1.5 by using 20 wt% sodium hydroxide solution. Then, the solution was kept at 80 캜 for 4 hours, And replenished with distilled water to 1 liter. The physical properties thereof were measured and the results are shown in Table 2.

[Comparative Example 2]

PAC (poly aluminum chloride) sold in the market was used, and its major components are shown in Table 2.

Al ₂ O ₃ (wt%) Fe ₂ O ₃ (wt%) MgO (wt%) SiO ₂ (wt%) Total (wt%) importance pH Appearance Example 1 10.91 2.04 1.68 0.82 15.45 1.468 1.12 Transparent reddish brown Example 2 4.83 5.33 1.68 1.74 13.58 1.290 1.09 Transparent reddish brown Example 3 7.87 3.68 1.68 1.27 14.50 1.378 1.15 Transparent reddish brown Example 4 6.35 4.50 1.68 1.51 14.04 1.334 1.10 Transparent reddish brown Example 5 4.52 3.20 1.68 2.23 11.63 1.106 1.23 Transparent reddish brown Example 6 6.45 3.21 1.68 2.45 13.79 1.310 1.07 Transparent reddish brown Example 7 7.67 3.52 1.68 1.37 14.24 1.353 1.13 Transparent reddish brown Example 8 10.53 2.02 1.68 0.75 14.98 1.376 1.15 Transparent reddish brown Example 9 6.89 3.99 1.68 0.62 13.18 1.252 1.16 Transparent reddish brown Example 10 10.91 2.04 1.68 0.82 15.45 1.437 1.73 Yellowish red Example 11 7.87 3.68 1.68 1.27 14.50 1.349 1.89 Yellowish red Example 12 10.53 2.02 1.68 0.75 14.98 1.393 1.85 Yellowish red Example 13 10.91 2.04 1.68 0.82 15.45 1.467 1.85 Yellowish red Comparative Example 1 10.90 2.04 1.68 0.75 15.12 1.436 1.95 Yellowish red Comparative Example 2 11.0 - - - 11.0 - - Light brown

In Table 2, the water treatment agents prepared by the methods of Examples 1 to 9 according to the present invention have different compositions of main components according to the raw materials, It has been found that the embodiments have properties similar to those of commercially available water treatment agents. Therefore, the water treatment agent prepared according to the present invention can be produced by using the by-product and the natural clay without using the expensive raw material, so that the production cost can be drastically reduced.

The water treatment performance was tested using the water treatment agent.

[Experimental Example 1]

In Experimental Example 1, the wastewater treatment performance was tested according to the effective ingredient composition of the water treatment agent.

For this purpose, 1 L of raw water in a sewage treatment plant was taken and put into a container, and 0.3 mL / L of the water treatment agent prepared in the above-mentioned Examples 1 to 9 was added and mixed. The pH of the solution was adjusted to 7 by the addition of calcium hydroxide (Ca (OH) ₂ ) in the vessel, the solution was stirred at a rate of about 300 RPM for the first 5 minutes, then 30 RPM Lt; / RTI >

Stirring was then stopped and the reactants in the solution were precipitated and then collected and analyzed. The analytical method was carried out in accordance with the method specified in the water pollution process test method, and the results are shown in Table 3.

COD T-N T-P SS Odor (intensity) Chromaticity Example 1 15.5. 15.78 0.060 3 2 transparent Example 2 19.83 15.39 0.098 3 One transparent Example 3 17.58 18.53 0.068 3 One transparent Example 4 18.26 14.99 0.072 3 One transparent Example 5 20.08 15.05 0.160 3 One transparent Example 6 18.88 15.49 0.103 3 One transparent Example 7 18.28 16.02 0.092 3 One transparent Example 8 15.27 15.78 0.078 3 2 transparent Example 9 18.98 14.56 0.109 3 One transparent Comparative Example 1 16.75 14.79 0.070 3 2 transparent enemy 46.50 27.38 3.92 125.10 4 Pale yellow

As shown in Table 3, it can be seen that the water treatment agents of Examples 1 to 9 prepared by the water treatment agent preparation method of the present invention have similar water treatment performance to the products used as water treatment agents in the prior art. However, in the case of Examples 1 and 8, the COD removing performance is superior to that of Comparative Example 1, and in the case of Example 9, the nitrogen compound removing performance is superior to that of Comparative Example 1. In particular, in the other Examples except for Examples 1 and 8, the malodor removing performance was superior to that of Comparative Example 1, and it was found that the iron component affected the malodor removal performance. And the float removal performance of the embodiment was found to be almost the same level in both the embodiment and the comparative example.

[Experimental Example 2]

In Experimental Example 2, the performance of wastewater treatment according to the types of anions contained in the water treatment agent was tested. The results are shown in Table 4, except that water treatment agents according to Examples 1, 3, 8, 10, 11 and 13 and Comparative Example 1 were used.

Anion (wt%) Settling speed (minute / 20 cm) COD T-N T-P SS Odor (intensity) Example 1 SO ₄ ^{2 -} (15.45) 30 15.53 15.78 0.060 3 2 Example 3 SO4 < _{2 &} ^{gt; -} (14.40) 30 17.58 18.53 0.068 3 One Example 8 SO ₄ ^{2 -} (14.98) 30 15.27 15.75 0.078 3 2 Example 10 Cl ^- (15.45) 15 15.30 15.64 0.054 2 One Example 11 Cl ^- (14.40) 15 15.78 15.85 0.080 2 One Example 13 SO ₄ ^{2 -} / Cl ^- (15.45) 15 12.23 15.50 0.053 2 One Comparative Example 1 SO ₄ ^{2 -} (11.0) 15 21.88 20.68 0.136 3 3 enemy - - 46.50 27.38 3.92 125.10 4

Table 4 shows water treatment performance depending on the types of anions contained in the solution used in the water treatment agent preparation. Here, it can be seen that the water treatment agents prepared in Examples 1, 3, 8, 10, 11 and 13 have superior water treatment performance as compared with the water treatment agent of Comparative Example 1. In particular, the water-treating agent containing Cl- has a faster sedimentation rate than the water-containing agent containing SO42-. (Kind of anions of Comparative Example 1 and analysis of experimental results)

[Experimental Example 3]

In Experimental Example 3, the wastewater treatment performance according to the amount of water treatment agent was tested.

Herein, the water treatment agent prepared in Example 10 was used, and the same procedure as in Experimental Example 1 was repeated except that 0, 0.025, 0.1, 0.2, 0.3 and 0.5 ml of the water treatment agent were added, respectively Experiments were performed. The results are shown in Table 5.

Input (ml) 0 0.025 0.1 0.2 0.3 0.5 One COD (mg / l) 45.40 33.01 27.75 17.87 16.75 15.53 14.32 T-N (mg / l) 25.10 22.32 18.27 16.50 15.72 12.78 11.50 T-P (mg / l) 2.29 1.32 0.584 0.123 0.051 0 0 SS (mg / l) 120.50 58.20 12.54 5.27 2.89 2.50 2.32 Odor (intensity) 4 4 3 2 One One One

Referring to Table 5, it can be seen that the water treatment performance is improved in proportion to the input amount of the water treatment agent. In particular, the water treatment agent prepared according to Example 10 shows that the phosphorus compound is completely removed when 0.5 ml or more per liter of wastewater is added.

According to the results of the experiment described above, although the water treatment agent prepared according to the embodiment of the present invention has a difference according to the amount of the water treatment agent and the content of the active ingredient, the removal efficiency of various organic substances, color, odor and suspended substances contained in the wastewater .

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. It will be understood that variations and specific embodiments which may occur to those skilled in the art are included within the scope of the present invention.

Claims (20)

Preparing red mud or clay containing at least one of aluminum (Al), iron (Fe), magnesium (Mg) and silica (Si) as raw materials and a solvent;
Introducing the raw material into the solvent to extract at least one of aluminum, iron, magnesium and silica as effective ingredients contained in the raw material;
Hydrolyzing the extracted active ingredient;
Reducing the hydrolyzed active ingredient to polymerize the hydrolyzed active ingredient; And
Stabilizing the polymerized active ingredient;
/ RTI >
The process of extracting the active ingredient may include:
Adding the acidic solution while stirring the raw material into distilled water and extracting the active ingredient from the raw material;
Separating the first filtered water from which the effective component is extracted and the residue;
/ RTI >
Washing the residue with washing water to extract an active ingredient from the residue;
Separating the second filtered water from which the effective component is extracted and the residue; And
And mixing the first filtered water and the second filtered water at least once. delete The method according to claim 1,
Wherein the clay is at least one of borocite, loess, bentonite, kaolin and acidic clay. delete delete The method according to claim 1,
Wherein the acidic solution is at least one of sulfuric acid and hydrochloric acid. delete The method according to claim 1,
(Al ₂ (SO ₄ ) ₃ ), ferrous sulfate (FeSO ₄ ), magnesium sulfate (MgSO ₄ ), aluminum chloride (AlCl ₃ ), ferric chloride (FeCl ₃ ) And magnesium chloride (MgCl ₂ ) are produced. The method according to claim 1,
Wherein the active ingredient additive is added to a solution obtained by mixing the first filtered water and the second filtered water with the effective component extracted in the mixed solution. The method of claim 9,
Wherein the active ingredient additive comprises at least one of aluminum, iron, silicon, and magnesium. The method of claim 9,
The composition of the final active ingredient contained in the mixed solution is 40 to 80 wt% of aluminum oxide (Al ₂ O ₃ ), 5 to 30 wt% of iron oxide (Fe ₂ O ₃ ), 1 to 5 wt% of silicon dioxide (SiO ₂ ) (MgO) in an amount of 5 to 30 wt%. The method of claim 9,
Wherein the hydrolysis is performed by adding any one of sodium hydroxide (NaOH), sodium carbonate (Na ₂ CO ₃ ), and sodium hydrogencarbonate (NaHCO ₃ ) to the mixed solution. The method of claim 12,
Wherein at least one of sodium hydroxide (NaOH), hydrogen peroxide (H ₂ O ₂ ), sodium carbonate (Na ₂ CO ₃ ) and sodium hydrogencarbonate (NaHCO ₃ ) is used as a reducing agent in the reduction process. Claim 13:
Wherein the aluminum-silicate-based polymer material is produced during the reduction process. 15. The method of claim 14,
Wherein the polymer material has a molecular weight of 100,000 to 500,000. 15. The method of claim 14,
Wherein at least one of polyacrylamide, sodium alginate, carboxymethylrulyose (CMC), and polyethylene oxide is used as a stabilizer in the stabilization process. 18. The method of claim 16,
Wherein the concentration of the stabilizer is 0.05 wt / v% to 0.5 wt / v%. 18. The method of claim 16,
Wherein the aluminum-silicate material and the metal hydrate are combined with each other to form an Al-Fe / Mg-Si water treatment agent during the stabilization process. A process for producing a water treatment agent according to any one of claims 1, 3, 6 and 8 to 18, Water treatment agent. The method of claim 19,
Wherein the concentration of the active ingredient in the water treatment agent is 8 wt / v% to 25 wt / v%.

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