CN112209480A - Composite decolorizing flocculant for water treatment and preparation method thereof - Google Patents
Composite decolorizing flocculant for water treatment and preparation method thereof Download PDFInfo
- Publication number
- CN112209480A CN112209480A CN202010832552.4A CN202010832552A CN112209480A CN 112209480 A CN112209480 A CN 112209480A CN 202010832552 A CN202010832552 A CN 202010832552A CN 112209480 A CN112209480 A CN 112209480A
- Authority
- CN
- China
- Prior art keywords
- flocculant
- water treatment
- composite
- decolorizing flocculant
- composite decolorizing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a composite decolorizing flocculant for water treatment, which comprises the following components in percentage by weight: 20-30% of a flocculating agent, 20-30% of an adsorbent, 5-10% of a coagulant aid, 5-10% of hydroxyethyl diamine, 1-5% of alkyl alcohol amine, 5-10% of formaldehyde and 1-5% of urea. The composite decolorizing flocculant has good stability and is suitable for treating various industrial waste water such as printing and dyeing waste water, electroplating waste water and the like. The composite decolorizing flocculant has good treatment effect on wastewater, can generate larger floccules in the flocculation process, and has the decolorizing rate of over 96 percent and the COD removal rate of over 85 percent.
Description
Technical Field
The invention belongs to the field of sewage treatment, and particularly relates to a composite decolorizing flocculant for water treatment and a preparation method thereof.
Background
The wastewater discharged by the industries of printing and dyeing, spinning, dyeing, papermaking and the like has the characteristics of large water quantity, complex components, high pollutant concentration, deep chromaticity and the like, has certain oxidation resistance and biodegradability, and becomes an important pollution source of each large water area in China. The decolorization treatment of the high-concentration high-chroma wastewater is one of the difficult problems of all discharge enterprises, and the decolorization treatment needs to be effectively treated to reduce the pollution and harm to the environment.
For example, chinese patent application No. CN200810249653.8 discloses a method for preparing a composite decolorizing flocculant for high-concentration high-chroma wastewater, which comprises the synthesis of polyaluminum silicate chloride, the synthesis of polyamine epichlorohydrin resin, the synthesis of synergistic stabilizer and final synthesis.
For another example, chinese patent application No. CN201911203337.1 discloses a decolorizing flocculant for textile printing and dyeing wastewater and a preparation method thereof, which comprises sequentially adding multiple inorganic components into deionized water, stirring to form a uniform solution, adjusting the pH of the system with citric acid, adding the organic components, the graft modified chitosan, the modified zeolite powder, and polyacrylamide, stirring for a period of time, adding hydrogen peroxide dropwise, sealing, standing, and aging.
Based on the prior art, the inventor develops a composite decolorizing flocculant for water treatment and a preparation method thereof by actively researching and creating based on years of abundant practical experience and professional knowledge of the product and the application of theories, and the composite decolorizing flocculant has the advantage of high decolorizing rate.
Disclosure of Invention
The invention mainly aims to overcome the defects in the prior art and provide a composite decolorizing flocculant for water treatment and a preparation method thereof.
The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme.
The invention provides a composite decolorizing flocculant for water treatment, which comprises the following components in percentage by weight: 20-30% of a flocculating agent, 20-30% of an adsorbent, 5-10% of a coagulant aid, 5-10% of hydroxyethyl diamine, 1-5% of alkyl alcohol amine, 5-10% of formaldehyde and 1-5% of urea.
The composite decolorizing flocculant used in water treatment comprises the following components in percentage by weight: 25% of flocculant, 25% of adsorbent, 10% of coagulant aid, 8% of hydroxyethyl diamine, 2% of alkyl alcohol amine, 10% of formaldehyde and 3% of urea.
The composite decolorizing flocculant used in water treatment is selected from any one of polymeric ferric aluminum sulfate chloride, polymeric ferric sulfate, polyacrylamide and polymeric aluminum chloride.
The composite decolorizing flocculant for water treatment is prepared from any one of activated carbon, diatomite, alumina and silica gel.
The composite decolorizing flocculant for use in water treatment described above, wherein the coagulant aid is selected from one or more of nitrates, sulfates or hydrochlorides of lanthanum, terbium, dysprosium, holmium, cerium, praseodymium, neodymium, promethium, ytterbium, lutetium, scandium, samarium, europium, gadolinium, erbium, thulium, yttrium.
The composite decolorizing flocculant for water treatment is prepared from one or more of N-hydroxyethyl piperazine, N-hydroxyethyl imidazole, N-hydroxyethyl ethylenediamine, N-hydroxyethyl propylenediamine and N-hydroxyethyl hexylenediamine.
The composite decolorizing flocculant for water treatment is characterized in that the alkyl alcohol amine is selected from any one of diethanolamine, tert-butylamine ethanol and 2-amino-2-methyl-1-propanol.
The composite decolorizing flocculant used in water treatment also comprises water.
The invention also provides a method for preparing the composite decolorizing flocculant for water treatment, which comprises the following steps:
(1) dissolving a flocculating agent in water, adding a formaldehyde water solution under the stirring condition, reacting for 1.5-2 h at the temperature of 20-40 ℃, adding alkyl alcohol amine, and continuously reacting for 1-1.5 h at the temperature of 60-70 ℃ to obtain a mixed solution;
(2) and adding the adsorbent, the coagulant aid, the hydroxyethyl diamine and the urea into the mixed solution in sequence, and uniformly stirring at normal temperature to obtain the composite decolorizing flocculant.
By the technical scheme, the invention at least has the following advantages: the composite decolorizing flocculant has good stability and is suitable for treating various industrial waste water such as printing and dyeing waste water, electroplating waste water and the like. The composite decolorizing flocculant has good treatment effect on wastewater, can generate larger floccules in the flocculation process, and has the decolorizing rate of over 96 percent and the COD removal rate of over 85 percent.
In conclusion, the special composite decolorizing flocculant for water treatment has the advantage of good decolorizing effect. The method has the advantages and practical value, does not have similar design publication or use in the similar products and methods, is innovative, has great improvement on the method or the function, has great technical progress, produces good and practical effects, has multiple enhanced efficacies compared with the prior products, is more suitable for practical use, has industrial wide utilization value, and is a novel, improved and practical new design.
The foregoing is a summary of the present invention, and in order to provide a clear understanding of the technical means of the present invention and to be implemented in accordance with the present specification, the following is a detailed description of the preferred embodiments of the present invention.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to the composite decolorizing flocculant for water treatment, the composite decolorizing flocculant comprises the following components in percentage by weight: 20-30% of a flocculating agent, 20-30% of an adsorbent, 5-10% of a coagulant aid, 5-10% of hydroxyethyl diamine, 1-5% of alkyl alcohol amine, 5-10% of formaldehyde and 1-5% of urea.
The composite decolorizing flocculant for water treatment according to the present invention preferably comprises the following components by weight: 25% of flocculant, 25% of adsorbent, 10% of coagulant aid, 8% of hydroxyethyl diamine, 2% of alkyl alcohol amine, 10% of formaldehyde and 3% of urea.
The composite decolorizing flocculant for water treatment according to the present invention is preferably selected from any one of polyaluminum ferric sulfate chloride, polyferric sulfate, polyacrylamide and polyaluminum aluminum chloride.
According to the composite decolorizing flocculant for water treatment, the adsorbent is preferably selected from any one of activated carbon, diatomite, alumina and silica gel.
The composite decolorizing flocculant for water treatment according to the present invention, preferably, the coagulant aid is selected from one or more of nitrate, sulfate or hydrochloride of lanthanum, terbium, dysprosium, holmium, cerium, praseodymium, neodymium, promethium, ytterbium, lutetium, scandium, samarium, europium, gadolinium, erbium, thulium and yttrium.
According to the composite decolorizing flocculant for water treatment, preferably, the hydroxyethyldiamine is selected from one or more of N-hydroxyethylpiperazine, N-hydroxyethylimidazole, N-hydroxyethylethylenediamine, N-hydroxyethylpropylenediamine and N-hydroxyethylhexamethylenediamine.
According to the composite decolorizing flocculant for water treatment of the present invention, preferably, the alkyl alcohol amine is selected from any one of diethanolamine, tert-butylamine ethanol, and 2-amino-2-methyl-1-propanol.
The composite decolorizing flocculant for water treatment according to the present invention preferably further comprises water.
The method for preparing the composite decolorizing flocculant for water treatment comprises the following steps:
(1) dissolving a flocculating agent in water, adding a formaldehyde water solution under the stirring condition, reacting for 1.5-2 h at the temperature of 20-40 ℃, adding alkyl alcohol amine, and continuously reacting for 1-1.5 h at the temperature of 60-70 ℃ to obtain a mixed solution;
(2) and adding the adsorbent, the coagulant aid, the hydroxyethyl diamine and the urea into the mixed solution in sequence, and uniformly stirring at normal temperature to obtain the composite decolorizing flocculant.
The following will explain in detail by specific examples, wherein the raw materials are in parts by weight.
Example 1
Dissolving 25 parts of poly ferric aluminum sulfate chloride in water, adding 10 parts of formaldehyde aqueous solution under the stirring condition, reacting for 2 hours at the temperature of 30 ℃, adding 2 parts of 2-amino-2-methyl-1-propanol, and continuously reacting for 1 hour at the temperature of 70 ℃ to obtain a mixed solution. And adding 25 parts of activated carbon, 10 parts of lanthanum nitrate, 8 parts of N-hydroxyethyl imidazole and 3 parts of urea into the mixed solution in sequence, and uniformly stirring at normal temperature to obtain the composite decolorizing flocculant.
Example 2
Dissolving 20 parts of poly ferric aluminum sulfate chloride in water, adding 8 parts of formaldehyde aqueous solution under the stirring condition, reacting for 2 hours at the temperature of 30 ℃, adding 5 parts of 2-amino-2-methyl-1-propanol, and continuously reacting for 1 hour at the temperature of 70 ℃ to obtain a mixed solution. And adding 30 parts of activated carbon, 8 parts of lanthanum nitrate, 10 parts of N-hydroxyethyl imidazole and 1 part of urea in sequence into the mixed solution, and uniformly stirring at normal temperature to obtain the composite decolorizing flocculant.
Example 3
Dissolving 30 parts of polymeric ferric aluminum sulfate chloride in water, adding 5 parts of formaldehyde aqueous solution under the stirring condition, reacting for 2 hours at the temperature of 30 ℃, adding 1 part of tert-butylamine ethanol, and continuously reacting for 1 hour at the temperature of 70 ℃ to obtain a mixed solution. And adding 20 parts of diatomite, 5 parts of lanthanum nitrate, 5 parts of N-hydroxyethyl imidazole and 1 part of urea into the mixed solution in sequence, and uniformly stirring at normal temperature to obtain the composite decolorizing flocculant.
Example 4
Dissolving 25 parts of poly ferric aluminum ferric chloride sulfate in water, adding 5 parts of formaldehyde aqueous solution under the stirring condition, reacting for 2 hours at the temperature of 30 ℃, adding 3 parts of tert-butylamine ethanol, and continuously reacting for 1 hour at the temperature of 70 ℃ to obtain a mixed solution. And adding 20 parts of diatomite, 5 parts of lanthanum nitrate, 8 parts of N-hydroxyethyl piperazine and 3 parts of urea into the mixed solution in sequence, and uniformly stirring at normal temperature to obtain the composite decolorizing flocculant.
Example 5
Dissolving 25 parts of polyacrylamide in water, adding 8 parts of formaldehyde aqueous solution under the stirring condition, reacting for 2 hours at the temperature of 30 ℃, adding 5 parts of 2-amino-2-methyl-1-propanol, and continuously reacting for 1 hour at the temperature of 70 ℃ to obtain a mixed solution. And adding 20 parts of diatomite, 5 parts of lanthanum nitrate, 5 parts of N-hydroxyethyl piperazine and 1 part of urea into the mixed solution in sequence, and uniformly stirring at normal temperature to obtain the composite decolorizing flocculant.
Example 6
Dissolving 30 parts of polyacrylamide in water, adding 8 parts of formaldehyde aqueous solution under the stirring condition, reacting for 1.5 h at the temperature of 20 ℃, adding 5 parts of 2-amino-2-methyl-1-propanol, and continuously reacting for 1 h at the temperature of 60 ℃ to obtain a mixed solution. And adding 25 parts of diatomite, 5 parts of lanthanum nitrate, 10 parts of N-hydroxyethyl piperazine and 3 parts of urea into the mixed solution in sequence, and uniformly stirring at normal temperature to obtain the composite decolorizing flocculant.
Example 7
Dissolving 25 parts of polyacrylamide in water, adding 5 parts of formaldehyde aqueous solution under the stirring condition, reacting for 1.5 h at the temperature of 20 ℃, adding 5 parts of tert-butylamine ethyl alcohol, and continuing to react for 1 h at the temperature of 60 ℃ to obtain a mixed solution. And adding 20 parts of activated carbon, 5 parts of lanthanum nitrate, 5 parts of N-hydroxyethyl piperazine and 1 part of urea into the mixed solution in sequence, and uniformly stirring at normal temperature to obtain the composite decolorizing flocculant.
Example 8
Dissolving 20 parts of polyacrylamide in water, adding 5 parts of formaldehyde aqueous solution under the stirring condition, reacting for 1.5 h at 40 ℃, adding 5 parts of tert-butylamine ethyl alcohol, and continuing to react for 1.5 h at 65 ℃ to obtain a mixed solution. And adding 20 parts of activated carbon, 8 parts of lanthanum nitrate, 5 parts of N-hydroxyethyl piperazine and 2 parts of urea into the mixed solution in sequence, and uniformly stirring at normal temperature to obtain the composite decolorizing flocculant.
Test example 1 evaluation of wastewater treatment Effect of composite decolorizing flocculant
The test method comprises the following steps: the composite decolorizing flocculant prepared in examples 1-8 was used in a wastewater treatment test of printing and dyeing wastewater, and the main water quality indexes of the original printing and dyeing wastewater are shown in Table 1. The specific method comprises the following steps: in the step of flocculation and decoloration, the composite decoloration flocculant is directly added into the wastewater according to the feeding proportion of 30 mL per liter of water, the mixture is stirred for 5 min at the speed of 300 r/min and then for 5 min at the speed of 40 r/min, after standing and precipitating for 45 min, various indexes are measured, and the results are shown in Table 2.
TABLE 1 Water quality index of printing and dyeing wastewater
| Index (I) | COD，mg/L | Color intensity | Colour(s) | Turbidity of water |
| Printing and dyeing wastewater | 2521.6 | 520 | Deep yellow | 130 |
TABLE 2 determination of indexes after treatment with composite decolorizing flocculant
| Numbering | COD，mg/L | Color intensity | Colour(s) | Turbidity of water |
| Example 1 | 210.4 | 14 | Colorless and colorless | 9 |
| Example 2 | 301.5 | 19 | Colorless and colorless | 13 |
| Example 3 | 294.1 | 16 | Colorless and colorless | 11 |
| Example 4 | 263.6 | 15 | Colorless and colorless | 11 |
| Example 5 | 289.9 | 16 | Colorless and colorless | 12 |
| Example 6 | 272.7 | 15 | Colorless and colorless | 12 |
| Example 7 | 310.4 | 19 | Colorless and colorless | 15 |
| Example 8 | 304.2 | 18 | Colorless and colorless | 13 |
As can be seen from the results of the above tables 1 and 2, the composite decolorizing flocculant of the invention has the advantages of strong adsorption capacity and good decolorizing effect, has good treatment effect on printing and dyeing wastewater, can generate larger floccules in the flocculation process, and has the decolorizing rate of more than 96 percent and the COD removal rate of more than 85 percent.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A composite decolorizing flocculant used in water treatment comprises the following components in percentage by weight: 20-30% of a flocculating agent, 20-30% of an adsorbent, 5-10% of a coagulant aid, 5-10% of hydroxyethyl diamine, 1-5% of alkyl alcohol amine, 5-10% of formaldehyde and 1-5% of urea.
2. The composite decolorizing flocculant for use in water treatment according to claim 1, wherein the composite decolorizing flocculant comprises the following components in percentage by weight: 25% of flocculant, 25% of adsorbent, 10% of coagulant aid, 8% of hydroxyethyl diamine, 2% of alkyl alcohol amine, 10% of formaldehyde and 3% of urea.
3. The composite decolorizing flocculant for use in water treatment according to claim 1, wherein the flocculant is selected from any one of polyaluminum ferric sulfate chloride, polyferric sulfate, polyacrylamide and polyaluminum chloride.
4. The composite decolorizing flocculant for use in water treatment according to claim 1, wherein the adsorbent is selected from any one of activated carbon, diatomaceous earth, alumina, silica gel.
5. The composite decolorizing flocculant for use in water treatment according to claim 1, wherein the coagulant aid is selected from one or more of nitrates, sulfates or hydrochlorides of lanthanum, terbium, dysprosium, holmium, cerium, praseodymium, neodymium, promethium, ytterbium, lutetium, scandium, samarium, europium, gadolinium, erbium, thulium, yttrium.
6. The composite decolorizing flocculant for use in water treatment according to claim 1, wherein the hydroxyethyldiamine is selected from one or more of N-hydroxyethylpiperazine, N-hydroxyethylimidazole, N-hydroxyethylethylenediamine, N-hydroxyethylpropylenediamine, N-hydroxyethylhexamethylenediamine.
7. The composite decolorizing flocculant for use in water treatment according to claim 1, wherein the alkyl alcohol amine is selected from any one of diethanolamine, tert-butylamine-based ethanol, 2-amino-2-methyl-1-propanol.
8. The composite decolorizing flocculant for use in water treatment according to claim 1, further comprising water.
9. A method for preparing the composite decolorizing flocculant for water treatment according to any of claims 1 to 8, comprising the steps of:
(1) dissolving a flocculating agent in water, adding a formaldehyde water solution under the stirring condition, reacting for 1.5-2 h at the temperature of 20-40 ℃, adding alkyl alcohol amine, and continuously reacting for 1-1.5 h at the temperature of 60-70 ℃ to obtain a mixed solution;
(2) and adding the adsorbent, the coagulant aid, the hydroxyethyl diamine and the urea into the mixed solution in sequence, and uniformly stirring at normal temperature to obtain the composite decolorizing flocculant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010832552.4A CN112209480A (en) | 2020-08-18 | 2020-08-18 | Composite decolorizing flocculant for water treatment and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010832552.4A CN112209480A (en) | 2020-08-18 | 2020-08-18 | Composite decolorizing flocculant for water treatment and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112209480A true CN112209480A (en) | 2021-01-12 |
Family
ID=74058853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010832552.4A Pending CN112209480A (en) | 2020-08-18 | 2020-08-18 | Composite decolorizing flocculant for water treatment and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112209480A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557215A (en) * | 2010-12-23 | 2012-07-11 | 陕西蓝清环境科技有限公司 | Compound organic water purifying agent and preparation method thereof |
| CN103265100A (en) * | 2013-05-08 | 2013-08-28 | 上海纳米技术及应用国家工程研究中心有限公司 | Iron-aluminum composite high-performance absorption flocculant, preparation method and applications thereof |
| CN103570110A (en) * | 2012-07-24 | 2014-02-12 | 上海纳米技术及应用国家工程研究中心有限公司 | Efficient composite absorbing and flocculating agent used for printing and dyeing waste water treatment, preparation method thereof and applications thereof |
| CN103663637A (en) * | 2013-11-27 | 2014-03-26 | 上海纳米技术及应用国家工程研究中心有限公司 | Complex bleaching flocculating agent used for metal plating wastewater and use method of complex bleaching flocculating agent |
| CN104229957A (en) * | 2013-06-24 | 2014-12-24 | 张家领 | Compound flocculant taking natural minerals as main components |
| CN106430495A (en) * | 2016-12-08 | 2017-02-22 | 上海立昌环境工程股份有限公司 | Preparation method of composite decolorizing flocculating agent for wastewater treatment |
-
2020
- 2020-08-18 CN CN202010832552.4A patent/CN112209480A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557215A (en) * | 2010-12-23 | 2012-07-11 | 陕西蓝清环境科技有限公司 | Compound organic water purifying agent and preparation method thereof |
| CN103570110A (en) * | 2012-07-24 | 2014-02-12 | 上海纳米技术及应用国家工程研究中心有限公司 | Efficient composite absorbing and flocculating agent used for printing and dyeing waste water treatment, preparation method thereof and applications thereof |
| CN103265100A (en) * | 2013-05-08 | 2013-08-28 | 上海纳米技术及应用国家工程研究中心有限公司 | Iron-aluminum composite high-performance absorption flocculant, preparation method and applications thereof |
| CN104229957A (en) * | 2013-06-24 | 2014-12-24 | 张家领 | Compound flocculant taking natural minerals as main components |
| CN103663637A (en) * | 2013-11-27 | 2014-03-26 | 上海纳米技术及应用国家工程研究中心有限公司 | Complex bleaching flocculating agent used for metal plating wastewater and use method of complex bleaching flocculating agent |
| CN106430495A (en) * | 2016-12-08 | 2017-02-22 | 上海立昌环境工程股份有限公司 | Preparation method of composite decolorizing flocculating agent for wastewater treatment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0341357B1 (en) | Flocculation of suspended solids from aqueous solutions | |
| WO2022110089A1 (en) | Waste water treatment composition for printing and dyeing wastewater, and preparation method therefor | |
| CN111470753B (en) | Sludge treatment agent for improving sludge dehydration rate and preparation method thereof | |
| CN111807490A (en) | Combined medicament for removing COD (chemical oxygen demand) and decoloring coking wastewater advanced treatment and application | |
| CN108502943A (en) | A kind of printing and dying industry wastewater flocculating agent and preparation method thereof | |
| CN109336238A (en) | A kind of flocculant and its application for treatment of dyeing wastewater | |
| CN109879386B (en) | Food industry wastewater treatment process | |
| CN111039466A (en) | High-efficiency industrial wastewater treatment method | |
| CN107381869B (en) | Method for treating methylene blue wastewater | |
| CN112209480A (en) | Composite decolorizing flocculant for water treatment and preparation method thereof | |
| CN104475036A (en) | Preparation method of industrial sewage/wastewater decolorant | |
| CN112028258A (en) | Water purifying agent for rapid treatment of industrial wastewater and preparation method thereof | |
| US5035808A (en) | Flocculation of suspended solids from aqueous solutions | |
| CN110550713A (en) | Composite efficient COD (chemical oxygen demand) remover | |
| CN115650448A (en) | Composite flocculant based on modified diatomite and application thereof | |
| CN109019811B (en) | Organic iron-based flocculating agent for treating papermaking wastewater and preparation method thereof | |
| CN114917878A (en) | Method for treating chromium-containing industrial wastewater by using modified algae adsorbent | |
| CN107381925B (en) | Method for treating methylene blue wastewater | |
| CN113429080A (en) | Process for treating wastewater generated in sulfamonomethoxine production | |
| CN112429794A (en) | Printing and dyeing wastewater treatment agent and preparation method thereof | |
| CN111925060A (en) | Sewage treatment agent and preparation method and application thereof | |
| CN107311385B (en) | Method for treating methylene blue wastewater | |
| CN107651715A (en) | A kind of textile waste inorganic agent | |
| CN110436597B (en) | Preparation method of low-viscosity, instant and efficient flocculation decolorizing agent | |
| CN115367853B (en) | Environment-friendly medicament for sewage treatment and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210112 |