KR101016392B1 - Coagulant compositions for water/wastewater treatment by using zirconium compounds and water/wastewater treatment method using the same - Google Patents

Coagulant compositions for water/wastewater treatment by using zirconium compounds and water/wastewater treatment method using the same Download PDF

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KR101016392B1
KR101016392B1 KR1020100086998A KR20100086998A KR101016392B1 KR 101016392 B1 KR101016392 B1 KR 101016392B1 KR 1020100086998 A KR1020100086998 A KR 1020100086998A KR 20100086998 A KR20100086998 A KR 20100086998A KR 101016392 B1 KR101016392 B1 KR 101016392B1
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zirconium
coagulant
water
component
sulfate
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Korean (ko)
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한승우
최영근
최기충
강임석
송광섭
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주식회사 수엔텍
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C02F1/5245Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5209Regulation methods for flocculation or precipitation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/58Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/105Phosphorus compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds

Abstract

PURPOSE: A coagulant composition for the water treatment, and a water treatment method using thereof are provided to improve the coagulating efficiency during a water treatment process by applying the coagulant composition for water purifying and sewage processing processes. CONSTITUTION: A coagulant composition for the water treatment contains the following: an aluminum salt based inorganic coagulant selected from the group consisting of aluminum sulfate, poly aluminum chloride silicate, and poly aluminum silicate sulfate; a ferric salt based inorganic coagulant; and a zirconium compound.

Description

Coagulant compositions for water / wastewater treatment by using zirconium compounds and water / wastewater treatment method using the same}

The present invention relates to a flocculant composition for water treatment and a water treatment method using the same, and more particularly, to a flocculant composition for water treatment containing a zirconium compound in an aluminum salt-based inorganic coagulant or an iron salt-based inorganic coagulant and a water treatment method using the same.

Generally, inorganic salt coagulant or aluminum salt inorganic coagulant, which is inorganic coagulant, is widely used for waste water treatment such as water treatment, sewage treatment and water treatment in paper industry. Increasing the amount of use does not properly remove suspended solids and dissolved organic substances in the flocculation process.In order to solve this problem, it is necessary to increase the load of advanced water purification treatment. In addition, in the summer, when the turbidity of the raw water is temporarily increased due to other causes or when the pH change is severe, the effective aggregation of the inorganic coagulant alone is difficult.

And recently published papers report that high residual aluminum concentration in treated water due to overuse of aluminum-based inorganic coagulant in water treatment is one cause of brain disease such as senile dementia called Alzheimer's disease. As a result, the European Community, which is aware of the hazards of aluminum, recommends a limit of 0.05 mg / l for drinking water, while the World Health Organization (WHO) has below 0.2 mg / l and the United States. Recommend to remain less than 0.1mg / ℓ in the second type of drinking water standards, and in 1996, Korea has been regulated to less than 0.2mg / ℓ.

In the case of the iron salt-based inorganic flocculant, there is a problem in that the treated water is excessively colored and a large amount of sludge is generated.In addition, the iron salt-based inorganic flocculant causes an odor by iron bacteria or forms Fe (OH) ₃. There is a problem of causing scale due to sedimentation and adhesion inside, and the coagulant of iron salt in Korea is mostly produced by using ferrous iron, which is produced as a by-product of steelmaking or steel mills, as a raw material. Therefore, it is not used for water purification but is mainly used for wastewater treatment.

In general, aluminum or iron salt-based inorganic flocculant destabilizes colloidal particles mainly by adsorption and charge neutralization, so the function of trivalent ions is limited.

As a flocculant-related technology that improves these problems, Korean Patent Publication No. 10-0497992 discloses polysilicate aluminum sulfate, and Korean Patent Publication No. 10-0310785 discloses aluminum sulfate, polyaluminum chloride, and poly Disclosed is a water treatment method using a polyamine polymer coagulant, in which a polyamine polymer coagulant is mixed with one inorganic coagulant selected from aluminum chloride silicate, polysulfite silicate, and aluminum (PASS).

The present invention is superior to the existing inorganic coagulant, and more particularly, and a technology for coagulant composition using zirconium compound in combination to remove organic matter, nitrogen and phosphorus at the same time in sewage and wastewater treatment. As a prior art to remove, in Korean Patent Publication No. 10-0342171, calcium-type artificial zeolite soluble aluminum- or iron salt-based compound natural or synthetic polymer coagulant, carbonate granules and alkali compounds of alkali metals, carbonates of alkaline earth metals , A coagulant selected from the group consisting of titanium dioxide and powdered activated carbon is disclosed, but it is a technology combining a plurality of agglomerates such as adsorbents and polymer coagulants, and Journal of Korean Society of Environmental Engineers, Vol. 31, No. 3, p. In 203 ~ 207, a paper about the results of the research using zirconium silicate as coagulant aid is published. However, no mention is made of the ability to remove nitrogen and phosphorus.

An object of the present invention is to provide a flocculant composition for water treatment and a water treatment method using the same to solve the conventional problems and to increase the flocculation efficiency in water and sewage and wastewater treatment. Coagulant composition which can remove water quality and organic matter, nitrogen and phosphorus at the same time by applying coagulant containing zirconium compound to aluminum salt coagulant or iron salt inorganic coagulant in the treatment process. It is an object to provide a method.

In addition, the present invention is to improve the water quality and the volume of sludge generated by the improvement of the flocculation efficiency in the coagulation process during drinking water purification, to prevent the reduction of residual aluminum, coloration, and smooth cohesion ability even in high turbidity It is an object of the present invention to provide a flocculant composition which is effective in removing algae and a water treatment method using the same.

The present invention is selected from the group consisting of aluminum sulfate (Alum), polyaluminum chloride (PAC), polyaluminum silicate chloride (PACS) and polyaluminum silicate silicate (PASS) as a solution for achieving the above object (a) component Ferric chloride (Ferric chloride, FeCl₃), ferrous chloride (FeCl₂), ferric sulfate (Ferric sulfate, Fe₂ (SO₄) ₃), ferrous sulfate , At least one iron salt-based inorganic coagulant selected from the group consisting of Fe (SO) ₄), polyferric chloride (PFC), polyferric sulfate (PFS) and polysilicate iron, c) a zirconium compound as a component.

The zirconium compound as the component (c) is selected from the group consisting of a compound of zirconium hydroxide, zirconium silicate, zirconium oxide and zirconium, and the aluminum-based inorganic coagulant as the component (a), and the iron salt inorganic as the (b) component. The blending amount of the coagulant and the zirconium compound as the component (c) is in the range of 100 mg / L to 5,000 mg / L based on the volume of the component (a) or (b), and when less than 100 mg / L, the coagulation effect is expressed. In case of exceeding 5,000 mg / l, the coagulation effect does not occur proportionally according to the excess amount of the zirconium compound, so it is most preferable in terms of economics and efficiency to mix within the range suggested by the present invention.

For example, in the case of water treatment, in the case of high turbidity of 100 NTU or more of turbidity of raw water, 500 mg / L to 1,000 mg / L of zirconium silicate per liter of inorganic coagulant of (a) component or (b) component It is used in a ratio, and when the pH of raw water is high from 8 to 10, zirconium silicate is used in a ratio of 100 mg / L to 500 mg / L. In the case of sewage and wastewater treatment, zirconium silicate is used at a rate of 1,000 mg / l to 5,000 mg / l when SS of raw water is 3,000 mg / l or more or when nitrogen and phosphorus are contained in a large amount.

In addition, the present invention is a coagulant composition for water treatment combining the (a) component or the component (b) with the component (c) in about 10 to 100mg / l based on the volume of purified water and sewage and wastewater treatment water , 20 ~ 60mg / L is preferably added, the input amount of the present invention is a water treatment method to remove the organic matter and nitrogen and phosphorus at the same time even if the input to the level of about 1/3 to 1/2 of the amount of flocculant used commonly Is done.

In general, most of the suspended solids dispersed in water and wastewater are composed of suspended solids which have a particle size of 0.1 μm to 100 μm and suspended particles having a particle size of 1 μm to 100 μm. It is colloidal fine particles that cannot be precipitated, and the solids in the constant have a particle size that is out of the range of the colloidal particles, but, like colloidal particles, most of them have precipitation characteristics that are negligible.

Representative mechanisms in which colloidal water or wastewater are coagulated by coagulants include (1) double-layer compression, (2) adsorption and chargeneutralization, (3) (4) Adsorption and interparticle bridging. Four types of iron salt or aluminum inorganic coagulants are adsorbed as trivalent ions. There is a limit to the action of destabilizing colloidal particles by adsorption and charge neutralization.

The coagulant composition for water treatment and the water treatment method according to the present invention are mixed with a trivalent zirconium compound to coexist trivalent cations and tetravalent cations, resulting in excellent adsorption and charge neutralization beyond the limits of trivalent. Not only does it show an increased cohesive efficiency, it is also appropriately selected according to the season, such as summer or winter, by the advantage that it can be used at about 1/3 to 1/2 of the amount of inorganic coagulant injected in each water treatment plant. By flocculating these flocs, they play a big role in organic matter removal and water quality improvement.

In addition, the present invention utilizes the property of absorbing nitrogen of zirconium to simultaneously remove nitrogen and phosphorus, which are problematic substances in wastewater, by flocculant mixed with aluminum salt, iron salt-based inorganic flocculant and zirconium compound. As a result, it is possible to further maximize the flocculation capacity of the purified and sewage treatment plants.

The zirconium compound used in the present invention described above is selected from the group consisting of zirconium hydroxide, zirconium silicate and zirconium oxide, preferably zirconium silicate is used. One zirconium compound is dissolved in aqua regia or hydrogen fluoride (HF) and used as an aqueous solution.A specific dissolution method is to slowly add one volume of nitric acid to three volumes of hydrochloric acid under normal temperature in a glass-coated dissolution tank. To prepare a predetermined amount of zirconium silicate into the prepared aqua regia through the inlet of the dissolution tank to dissolve to obtain zirconium silicate in the form of an aqueous solution.

The coagulant composition for water treatment and the water treatment method using the same according to the present invention solve the problem of lowering the coagulation efficiency according to the pH change by using the zirconium compound in a specific ratio, and the coagulation limit of the aluminum-based or iron salt-based coagulant of trivalent ions In addition, it exhibits an increased coagulation effect due to excellent adsorption and charge neutralization, and an excellent coagulation effect even when the amount of inorganic coagulant is used at about 1/3 to 1/2 of that of the conventional coagulant. As a result, the amount of flocculant used can be remarkably reduced, and the effect of solving the problems of chromaticity, odor induction and generation of sludge is large.

In addition, it has the advantage of simultaneously removing nitrogen and phosphorus, which are the causes of eutrophication and eutrophication, in the sewage and wastewater treatment, thereby further maximizing the flocculation capacity in the purified and sewage and wastewater treatment plants.

1 is a graph showing the flocculation efficiency of the flocculant injection amount of [Table 3]
2 is a graph showing the results of the flocculation efficiency of the flocculant injection amount of [Table 6]
Figure 3 is a graph showing the results of the flocculation efficiency of the flocculant injection amount of [Table 7]
Figure 4 is a graph showing the results of the flocculation efficiency of the flocculant injection amount of [Table 8]

Hereinafter, the present invention will be described in more detail with reference to Examples and Experimental Examples. However, the scope of the present invention is not limited by the Examples and Experimental Examples described below.

In the Examples and Experimental Examples according to the present invention, the purified water was rapidly stirred for about 1 minute at a speed of 250 rpm using a Jar-tester, and then slowly stirred for about 30 minutes at about 30 rpm. After standing for a minute, the treated water was collected and the turbidity and total organic matter (TOC) were measured, and the sewage and waste water treatment was performed using a jar tester at 250rpm. Rapid stirring at about 1 minute and slow stirring at about 30 rpm for 30 minutes, and then left to stand for 30 minutes. The treated water was collected and the SS, COD, TN, and TP were measured.

[ Example  One]

A. Zirconium Silicate  pharmacy

At room temperature, 3 volumes of hydrochloric acid and 1 volume of nitric acid were slowly added to the glass-coated reaction tank in order to prepare aqua regia, and zirconium silicate was added to the prepared aqua regia through the inlet of the reactor to obtain zirconium silicate in aqueous solution. Sample 1).

B. Aluminum salt system -Zirconium flocculant

At room temperature, polyaluminum chloride (PAC) was added to the reactor and stirred at 90 to 180 rpm, and 2,000 mg / l of zirconium silicate (sample 1) was added per liter of polyaluminum chloride (PAC) through the inlet of the reactor. Mixing with time to prepare an aluminum salt-zirconium flocculant mixed with a zirconium compound (sample 2).

C. Iron Salt-Zirconium Coagulant Preparation

At room temperature, ferric chloride (FeCl₃) was added to the reactor and stirred at 90 to 180 rpm, and 2,000 mg / ℓ of zirconium silicate (sample 1) was added per liter of ferric chloride (Ferric chloride) through the inlet of the reactor. 2 to 3 hours to prepare an aluminum salt-zirconium flocculant mixed with a zirconium compound (sample 3).

[ Experimental Example  One]

A. Aluminum salt system -Coagulation Characteristics of Water Treatment of Zirconium Mixture (Sample 2)

The coagulant composition (sample 2) mixed with the zirconium compound according to the present invention was applied to the Nakdong river river having the water quality conditions of the following [Table 1] to perform a coagulation experiment by Jar-tester (Phipps & Bird).

Agitation conditions of coagulation were determined through preliminary experiments using the average speed gradient (G) value according to the stirring speed (rpm). Each was 250rpm (G = 550sec -1 at 20 ℃) and 30rpm (G = 22 sec -1 at 20 ℃) in the stirring conditions of the preliminary test results derived optimal value G and the stirring time is rapid and slow stirring time were 1min and 30min appeared, and the coagulation experiment was carried out under the derived stirring conditions and stirring time. At this time, Gt values in rapid mixing and slow mixing were 33,000 and 39,600, respectively, and were within the AWWA (1998) range of rapid mixing (24,000 ~ 84,000). After slow stirring, the settling time was 30 minutes. After settling, the supernatant was collected from 10 cm below the surface of the water and analyzed by water quality (Standard methods (AWWA, 2005)). The instrument is shown in Table 2 below).

Jar-tester (Phipps & Bird Co., Ltd.) used in this experiment was equipped with six stirring devices. The size of the paddle (two-blade) connected to the stirring device was 2.54 W × 7.6 L cm. The device is adjustable. In addition, the jar used for the coagulation experiment used a square of 2 liter capacity. The advantages of using the square jar include ① reduction of vortex by stirring and ② a sampling port fixed at 10cm below the water surface to calculate the floc precipitation rate. Easy, ③ Jar is a thick acrylic material, and the temperature change is small due to low heat transfer.

[Table 3] below is aluminum sulfate-based inorganic coagulant, aluminum sulfate (Alum), polyaluminum chloride (PAC), polyaluminum silicate (PACS), and polysulfate aluminum, which are commonly used in Sample 2 of the present invention and water purification treatment sites. (PASS) shows the coagulation efficiency according to the coagulation characteristics of each, the coagulant composition (Sample 2, aluminum salt-zirconium mixture) mixed with the zirconium compound according to the present invention shows a better cohesive efficiency than other aluminum salt coagulant In particular, it shows an excellent effect on the removal of organic matter in water.

Figure 112010057782745-pat00001

In Table 1, the TOC value is measured to quantify the concentration of organic matter present in water, and UV-254 is widely used to indirectly measure the state of change of organic matter (Ezdwald et al., 1985).

Figure 112010057782745-pat00002

Figure 112010057782745-pat00003

B. Aluminum salt system -Agglomeration Characteristics of Sewage and Wastewater Treatment of Zirconium Mixture (Sample 2)

The wastewater used in the experiment was treated by biological treatment of sewage treatment plant as shown in Table 4 below, and the sedimentation basin effluent was collected before entering the sterilization tank, and a coagulation experiment using Jar-test was performed.

The coagulation test apparatus uses Jar-tester (Phipps & Bird Co., Ltd.) used in the 'coagulation characteristics of water treatment treatment of the coagulant composition (Sample 2, aluminum salt-zirconium mixture) mixed with zirconium compound' and the coagulation test conditions are used in the same way. COD, turbidity, TN and TP were used for the water quality analysis in the flocculation experiment, and the analysis method was performed by the standard methods (AWWA, 2005) and the water pollution process test method (Ministry of Environment). The analytical methods and instruments used for water quality analysis are shown in Table 5 below.

In addition, the coagulant composition mixed with the zirconium compound according to the present invention (Sample 2) and the aluminum salt-based inorganic coagulant, aluminum sulfate (Alum), polyaluminum chloride (PAC), polyaluminum silicate chloride (PACS) And coagulation efficiency according to the coagulation characteristics of the coagulant using polyaluminum silicate (PASS) is shown in [Table 6] below, and the coagulant composition in which the zirconium compound according to the present invention is mixed as shown in [Table 6] ( Sample 2, an aluminum salt-zirconium mixture), exhibited better cohesive efficiency than other aluminum salt-based coagulants, and particularly exhibited excellent effects in removing organic matter and nitrogen in water.

Figure 112010057782745-pat00004

Figure 112010057782745-pat00005

Figure 112010057782745-pat00006

[ Experimental Example  2]

A. Coagulation Characteristics of Water Treatment of Iron Salt-Zirconium Mixture (Sample 3)

The purified water sample (Nakdong River) and the experimental apparatus were carried out under the same conditions as the hydrostatic treatment flocculation characteristics experiment of Sample 2 of [Experimental Example 1].

Coagulant composition mixed with zirconium compound according to the present invention (Sample 3) Ferric chloride, FeCl₃, ferrous chloride (Ferrous chloride, FeCl₂), ferric sulfate (Ferric sulfate) , Fe₂ (SO₄) ₃), Ferrous sulfate (Fe (SO) ₄), polyferric chloride (PFC), polyferric sulfate (PFS), polysilicate iron The coagulation efficiency according to the coagulation properties of each coagulant is shown in [Table 7] below, and as shown in [Table 7], in the case of the coagulant composition (sample 3, iron salt-zirconium mixture) mixed with the zirconium compound according to the present invention. It shows a better flocculation efficiency than other iron salt coagulants, and particularly shows the effect of removing organic matter in water.

Figure 112010057782745-pat00007

B. Coagulation Characteristics of Sewage and Wastewater Treatment of Iron Salt-Zirconium Mixture (Sample 3)

The wastewater sample (the sedimentation basin effluent before being treated by biological treatment of the sewage treatment plant and introduced into the disinfection tank) and the experimental apparatus were carried out under the same conditions as the sewage and wastewater treatment coagulation characteristics test of Sample 2 of [Example 1].

Coagulant composition mixed with the zirconium compound according to the present invention (Sample 3) and ferric chloride, FeCl₃, ferrous chloride, ferrous chloride (Ferrous chloride, FeCl₂), ferric sulfate (Ferric) sulfate, Fe₂ (SO₄) ₃), ferrous sulfate (Fe (SO) ₄), polyferric chloride (PFC), polyferric sulfate (PFS), polysilicate iron Coagulation efficiency according to the coagulation properties of each coagulant is shown in [Table 8] below, and as shown in [Table 8] of the coagulant composition (sample 3, iron salt-zirconium mixture) mixed with the zirconium compound according to the present invention In this case, the coagulation efficiency is better than that of other iron salt coagulants, and in particular, it is excellent in removing organic matter in water.

Figure 112010057782745-pat00008

Claims (8)

  1. delete
  2. (a) At least one aluminum inorganic coagulant selected from the group consisting of aluminum sulfate (Alum), polyaluminum silicate silica (PACS) and aluminum polysilicate silicate (PASS), or (b) an iron salt inorganic coagulant as a component To the zirconium compound as a component (c), zirconium comprising a component (c) in the range of 100mg / l to 5,000mg / l based on the volume of the component (a) or (b) Coagulant composition for purified water or sewage and wastewater treatment.
  3. According to claim 2, wherein the iron salt-based inorganic coagulant (b) component Ferric chloride (FeCl₃), Ferrous chloride (Ferrous chloride, FeCl₂), Ferric sulfate (Fe₂ (SO₄) ₃), Ferrous sulfate ( Zirconium, characterized in that at least one member selected from the group consisting of ferrous sulfate, Fe (SO) ₄), polyferric chloride (PFC), polyferric sulfate (PFS) and polysilicate iron Coagulant composition for purified water or wastewater treatment using.
  4. The coagulant for water purification or wastewater treatment using zirconium according to claim 2 or 3, wherein the zirconium compound as the component (c) is any one selected from the group consisting of zirconium hydroxide, zirconium silicate, and zirconium oxide. Composition.
  5. delete
  6. (a) At least one aluminum inorganic coagulant selected from the group consisting of aluminum sulfate (Alum), polyaluminum silicate silica (PACS) and aluminum polysilicate silicate (PASS), or (b) an iron salt inorganic coagulant as a component To the (c) component, the zirconium compound is combined, but the coagulant composition comprising the component (c) in the range of 100 mg / L to 5,000 mg / L based on the volume of the component (a) or (b) is purified or ㆍ A method for treating purified water or sewage and wastewater, characterized by simultaneously removing organic matter, nitrogen and phosphorus from water by adding water to wastewater or sewage and wastewater in the range of 10 to 100 mg / L based on the volume of wastewater.
  7. According to claim 6, wherein the iron salt-based inorganic coagulant (b) component Ferric chloride (FeCl₃), Ferrous chloride (Ferrous chloride, FeCl₂), Ferric sulfate (Fe₂ (SO₄) ₃), Ferrous sulfate ( Integer, characterized in that at least one selected from the group consisting of ferrous sulfate, Fe (SO) ₄), polyferric chloride (PFC), polyferric sulfate (PFS) and polysilicate iron (polysilicate iron) Or sewage and wastewater treatment method.
  8. The method for treating purified water or sewage or wastewater according to claim 6 or 7, wherein the zirconium compound as the component (c) is any one selected from the group consisting of zirconium hydroxide, zirconium silicate, and zirconium oxide.
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KR101270211B1 (en) 2012-01-10 2013-05-31 주식회사 크린켐 Composition for treatment of wastewater containing fluorine
CN104291419A (en) * 2014-08-25 2015-01-21 河南鼎鑫冶金科技有限公司 Compound polymerization aluminum ferric chloride water treatment agent
CN104445546A (en) * 2014-11-05 2015-03-25 阳原县仁恒精细粘土有限责任公司 Coagulant for processing coating waste water and production process of coagulant
CN104445441A (en) * 2014-11-14 2015-03-25 河南省煤气(集团)有限责任公司 Method for producing polymeric aluminium ferric sulfate solution from industrial waste sulfuric acid generated during purification of acetylene gas and red mud
CN104591364A (en) * 2015-02-15 2015-05-06 陆燕 Composite flocculant and preparation method thereof
CN105712451A (en) * 2014-12-05 2016-06-29 郭杰 Clearing sewage treatment agent and preparation method thereof
CN105967295A (en) * 2016-06-27 2016-09-28 安徽世绿环保科技有限公司 Electroplating wastewater synchronous dephosphorization-defluorination compound flocculant and preparation method thereof
CN106186233A (en) * 2016-08-18 2016-12-07 桂林市春晓环保科技有限公司 A kind of efficiently waste water flocculant and preparation method thereof
WO2019119475A1 (en) * 2017-12-21 2019-06-27 北京工业大学 Method for enhancing coagulation in stages
KR101973986B1 (en) 2018-06-01 2019-08-23 염선화 Method of preparation for coagulant and treating method of water/wastewater using the same

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Cited By (11)

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Publication number Priority date Publication date Assignee Title
KR101270211B1 (en) 2012-01-10 2013-05-31 주식회사 크린켐 Composition for treatment of wastewater containing fluorine
CN104291419A (en) * 2014-08-25 2015-01-21 河南鼎鑫冶金科技有限公司 Compound polymerization aluminum ferric chloride water treatment agent
CN104445546A (en) * 2014-11-05 2015-03-25 阳原县仁恒精细粘土有限责任公司 Coagulant for processing coating waste water and production process of coagulant
CN104445441A (en) * 2014-11-14 2015-03-25 河南省煤气(集团)有限责任公司 Method for producing polymeric aluminium ferric sulfate solution from industrial waste sulfuric acid generated during purification of acetylene gas and red mud
CN105712451A (en) * 2014-12-05 2016-06-29 郭杰 Clearing sewage treatment agent and preparation method thereof
CN104591364A (en) * 2015-02-15 2015-05-06 陆燕 Composite flocculant and preparation method thereof
CN105967295A (en) * 2016-06-27 2016-09-28 安徽世绿环保科技有限公司 Electroplating wastewater synchronous dephosphorization-defluorination compound flocculant and preparation method thereof
CN105967295B (en) * 2016-06-27 2018-12-04 安徽世绿环保科技有限公司 Synchronous dephosphorization fluorine removal built-up flocculant of a kind of electroplating wastewater and preparation method thereof
CN106186233A (en) * 2016-08-18 2016-12-07 桂林市春晓环保科技有限公司 A kind of efficiently waste water flocculant and preparation method thereof
WO2019119475A1 (en) * 2017-12-21 2019-06-27 北京工业大学 Method for enhancing coagulation in stages
KR101973986B1 (en) 2018-06-01 2019-08-23 염선화 Method of preparation for coagulant and treating method of water/wastewater using the same

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