CN113044941A - Treating agent for recycling tanning comprehensive wastewater and preparation method and treatment method thereof - Google Patents
Treating agent for recycling tanning comprehensive wastewater and preparation method and treatment method thereof Download PDFInfo
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- CN113044941A CN113044941A CN202110260728.8A CN202110260728A CN113044941A CN 113044941 A CN113044941 A CN 113044941A CN 202110260728 A CN202110260728 A CN 202110260728A CN 113044941 A CN113044941 A CN 113044941A
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- 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
- C02F1/5245—Treatment 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
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- 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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- 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
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- 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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/22—Nature of the water, waste water, sewage or sludge to be treated from the processing of animals, e.g. poultry, fish, or parts thereof
- C02F2103/24—Nature of the water, waste water, sewage or sludge to be treated from the processing of animals, e.g. poultry, fish, or parts thereof from tanneries
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
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- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
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Abstract
The invention relates to the technical field of leather-making wastewater recycling, in particular to a treating agent for leather-making comprehensive wastewater recycling and a preparation method and a treatment method thereof. The treating agent for recycling the tanning comprehensive wastewater comprises the following components in parts by weight: 75-85 parts of polyquaternium and 15-25 parts of flocculating agent; the molecular weight of the polyquaternium is 2-40 ten thousand. The treating agent adopts polyquaternium which has strong cationic property and can react with small molecular organic matters (such as dye, surfactant, tanning agent and the like) in the comprehensive wastewater to reduce the hydrophilicity; meanwhile, the flocculating agent acts on the reacted organic matters to enable the organic matters to be aggregated and settled, so that the small molecular organic matters are removed. The treatment method can effectively remove micromolecular organic matters in the tanning comprehensive wastewater, reduce the chromaticity, reach the recycling standard, improve the utilization rate of water resources and reduce the pollution to the environment.
Description
Technical Field
The invention relates to the technical field of leather-making wastewater recycling, in particular to a treating agent for leather-making comprehensive wastewater recycling and a preparation method and a treatment method thereof.
Background
The leather industry is a distinctive and dominant industry in China and occupies an indispensable position in national economy. However, the large amount of wastewater generated in the leather making process poses a serious challenge to the health and continuing development of the leather industry.
The comprehensive wastewater refers to wastewater obtained by treating wastewater in a regulating reservoir at a second stage, and is characterized in that: compared with organic matters in the wastewater of the regulating reservoir, after the comprehensive wastewater is subjected to biochemical treatment, the molecular weight of the organic matters in the wastewater is relatively small, and the molecular weight is basically below 3000. The organic matter exists in a 90% soluble pollutant state and a 10% colloidal state, almost all the organic matter is synthetic organic matter which is difficult to biochemically treat due to the fact that the organic matter is biochemically treated, a small amount of natural organic matter is biochemically degraded into small molecular organic matter, and a small amount of dye exists and still has a certain chromaticity (150-400).
The tanning comprehensive wastewater has large water quantity, relatively low chroma and relatively low organic matter content after biochemical treatment. If the waste water can be treated and recycled, water resources can be effectively saved.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The first purpose of the invention is to provide a treating agent for leather-making comprehensive wastewater reuse.
The second purpose of the invention is to provide a preparation method of the leather-making comprehensive wastewater treatment agent.
The third purpose of the invention is to provide a method for treating the tanning comprehensive wastewater.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
the treating agent for recycling the tanning comprehensive wastewater comprises the following components in parts by weight:
75-85 parts of polyquaternium and 15-25 parts of flocculating agent;
the molecular weight of the polyquaternium is 2-40 ten thousand.
The treating agent adopts polyquaternium, has strong cationic property, can react with small molecular organic matters in the comprehensive wastewater, and reduces the hydrophilicity of the small molecular organic matters; meanwhile, the flocculating agent acts on the reacted organic matters to enable the organic matters to be aggregated and settled, so that the small molecular organic matters are removed.
The polyquaternary ammonium salt refers to a polymer containing quaternary ammonium groups in the structure. In a specific embodiment of the present invention, the polyquaternium comprises any one or more of polyquaternium-6, polyquaternium-7, and polyquaternium-11.
Specifically, the polyquaternium-6, the polyquaternium-7 and the polyquaternium-11 respectively have the following structural general formulas:
in a particular embodiment of the invention, the flocculating agent is selected from inorganic flocculating agents. Further, the inorganic flocculant comprises an inorganic polymeric flocculant.
In a specific embodiment of the present invention, the inorganic polymeric flocculant includes an aluminum salt inorganic polymeric flocculant and an iron salt inorganic polymeric flocculant. Further, the inorganic polymeric flocculant comprises any one or a mixture of more of polyaluminium chloride, polyaluminium sulfate, polyaluminium ferric sulfate and polyferric sulfate.
In a specific embodiment of the invention, the treating agent further comprises 800-1000 parts by weight of water. By adding water, a liquid treatment agent is obtained, and the uniformity and stability of the treatment agent can be ensured.
The invention also provides a preparation method of the treating agent for leather-making comprehensive wastewater reuse, which comprises the following steps:
the components are mixed evenly according to the proportion.
The invention also provides a treatment method of the treatment agent when the treatment agent is used for recycling comprehensive wastewater, which comprises the following steps:
mixing and reacting the tanning comprehensive wastewater with the treating agent for 15-60 min, carrying out solid-liquid separation, and collecting clear liquid; and carrying out adsorption treatment on the clear liquid.
In a specific embodiment of the present invention, the solid-liquid separation is performed using a centrifuge, a plate-and-frame filter press, or a bubbling bed separator.
In a specific embodiment of the present invention, the adsorption treatment is performed using a fixed bed, a fluidized bed, or an adsorption column. Further, the fixed bed, the fluidized bed or the adsorption tower is filled with activated carbon.
In a specific embodiment of the present invention, the particle size of the activated carbon is 20 to 60 mesh. Further, the activated carbon is selected from any one or more of wood chip activated carbon, shell activated carbon, biomass activated carbon and coal activated carbon. The shell-type activated carbon can be coconut shell-type activated carbon.
In a preferred embodiment of the present invention, the treatment agent is added in an amount of 0.2 to 1kg per ton of wastewater.
In a specific embodiment of the invention, the COD concentration in the comprehensive wastewater is not higher than 500 mg/L; the chroma is not higher than 400.
In the comprehensive wastewater, the molecular weight of organic matters is relatively small, and the molecular weight is basically below 5000.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the actual characteristics of the tanning comprehensive wastewater, the component types of pollutants in the tanning comprehensive wastewater are deeply explored, and the obtained treating agent is designed, so that the removal of small-molecular-weight organic matters in the tanning comprehensive wastewater is pertinently improved, and the removal rate of the small-molecular-weight organic matters in the comprehensive wastewater is greatly improved;
(2) the treatment method can effectively remove micromolecular organic matters in the tanning comprehensive wastewater, reduce the chromaticity, reach the recycling standard, improve the utilization rate of water resources and reduce the pollution to the environment.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following detailed description, but those skilled in the art will understand that the following described examples are some, not all, of the examples of the present invention, and are only used for illustrating the present invention, and should not be construed as limiting the scope of the present invention. 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. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The treating agent for recycling the tanning comprehensive wastewater comprises the following components in parts by weight:
75-85 parts of polyquaternium and 15-25 parts of flocculating agent;
the molecular weight of the polyquaternium is 2-40 ten thousand, preferably 2-20 ten thousand.
The treating agent adopts polyquaternium, has strong cationic property, can react with small molecular organic matters in the comprehensive wastewater, and reduces the hydrophilicity of the small molecular organic matters; meanwhile, the flocculating agent acts on the reacted organic matters to enable the organic matters to be aggregated and settled, so that the small molecular organic matters are removed.
As in various embodiments, the polyquaternium may be used in amounts of 75 parts, 76 parts, 77 parts, 78 parts, 79 parts, 80 parts, 81 parts, 82 parts, 83 parts, 84 parts, 85 parts, and the like; the flocculant may be used in an amount of 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, and the like.
In a preferred embodiment of the invention, 75 parts by weight of polyquaternium and 25 parts by weight of flocculant are included.
In a specific embodiment of the present invention, the polyquaternium comprises any one or more of polyquaternium-6, polyquaternium-7, and polyquaternium-11.
In a particular embodiment of the invention, the flocculating agent is selected from inorganic flocculating agents. Further, the inorganic flocculant comprises an inorganic polymeric flocculant.
In a specific embodiment of the present invention, the inorganic polymeric flocculant includes an aluminum salt inorganic polymeric flocculant and an iron salt inorganic polymeric flocculant. Further, the inorganic polymeric flocculant comprises any one or a mixture of more of polyaluminium chloride, polyaluminium sulfate, polyaluminium ferric sulfate and polyferric sulfate.
In a specific embodiment of the invention, the treating agent further comprises 800-1000 parts by weight of water. By adding water, a liquid treatment agent is obtained, and the uniformity and stability of the treatment agent can be ensured.
As in various embodiments, the water may be used in amounts of 800 parts, 850 parts, 900 parts, 950 parts, 1000 parts, and the like.
In the treating agent for recycling the leather-making comprehensive wastewater, the treating agent is obtained by mixing the polyquaternium and the flocculating agent as effective components with water, and the mass fraction of the effective components can be 10 +/-5%.
The invention also provides a preparation method of the treating agent for leather-making comprehensive wastewater reuse, which comprises the following steps:
the components are mixed evenly according to the proportion.
The invention also provides the use of the treating agent in
The treatment method for recycling the comprehensive wastewater comprises the following steps:
mixing and reacting the tanning comprehensive wastewater with the treating agent for 15-60 min, carrying out solid-liquid separation, and collecting clear liquid; and carrying out adsorption treatment on the clear liquid.
The liquid obtained after the treatment meets the recycling standard, is used for recycling, can improve the utilization rate of water resources, and reduces the pollution to the environment.
In a specific embodiment of the present invention, the solid-liquid separation is performed using a centrifuge, a plate-and-frame filter press, or a bubbling bed separator.
When a centrifuge is used for solid-liquid separation, the rotation speed of the centrifuge can be 3000 +/-200 rpm.
In a specific embodiment of the present invention, the adsorption treatment is performed using a fixed bed, a fluidized bed, or an adsorption column. Further, the fixed bed, the fluidized bed or the adsorption tower is filled with activated carbon.
In a specific embodiment of the present invention, the particle size of the activated carbon is 20 to 60 mesh. Further, the activated carbon is selected from any one or more of wood chip activated carbon, shell activated carbon, biomass activated carbon and coal activated carbon. The shell-type activated carbon can be coconut shell-type activated carbon.
After the comprehensive wastewater is treated by adopting the treating agent, the COD value and the chromaticity can be further reduced by matching with the adsorption operation.
In a preferred embodiment of the present invention, the amount of the wastewater treatment agent added is 0.2 to 1kg per ton of wastewater.
In a specific embodiment of the invention, the COD concentration in the comprehensive wastewater is not higher than 500 mg/L; the chroma is not higher than 400.
In the comprehensive wastewater, the pollutant has a larger difference with the pollutant components of the other stages. After the treatment by the treatment method, the removal efficiency of COD is up to more than 65%, and the removal efficiency of chroma is up to more than 75%.
In a specific embodiment of the present invention, the respective reagent species may be, but are not limited to, the following:
polyquaternium-6, molecular weight: 15 ten thousand, manufacturer: shandong Luyue chemical group Co., Ltd;
polyquaternium-7, molecular weight: 2 ten thousand, manufacturer: wenzhou defended good chemical technology ltd;
polyquaternium-11, molecular weight: 20 ten thousand, manufacturer: wuhan Carnous technologies, Inc.;
polyaluminum chloride, manufacturer: hiroshi water purification materials, Inc., of Hiroshi City;
coconut shell activated carbon, manufacturer: consolidates city, continental water purification materials, ltd.
Example 1
The embodiment provides a treating agent for recycling tanning comprehensive wastewater, which comprises the following components in parts by weight:
80 parts of polyquaternium-6, 20 parts of polyaluminium chloride and 900 parts of water.
The preparation method of the treating agent of the embodiment comprises the following steps:
80 parts of polyquaternium-6, 20 parts of polyaluminium chloride and 900 parts of water are weighed according to the proportion and uniformly mixed to obtain the treating agent for recycling the leather-making comprehensive wastewater.
Example 2
The present example refers to the treating agent for leather-making comprehensive wastewater reuse and the preparation method thereof of example 1, and the differences are only that: the polyquaternium-6 is replaced by the polyquaternium-7 with equal mass.
Example 3
The present example refers to the treating agent for leather-making comprehensive wastewater reuse and the preparation method thereof of example 1, and the differences are only that: the polyquaternium-6 is replaced by the polyquaternium-11 with equal mass.
Example 4
The treatment agent for recycling tanning comprehensive wastewater and the preparation method thereof in the embodiment refer to the treatment agent in the embodiment 1, and the difference is only that the dosage of each component is respectively as follows: 75 parts of polyquaternium-6, 25 parts of polyaluminium chloride and 900 parts of water.
Example 5
The treatment agent for recycling tanning comprehensive wastewater and the preparation method thereof in the embodiment refer to the treatment agent in the embodiment 1, and the difference is only that the dosage of each component is respectively as follows: 85 parts of polyquaternium-6, 15 parts of polyaluminium chloride and 900 parts of water.
Example 6
The embodiment provides a treatment method for recycling tanning comprehensive wastewater, which comprises the following steps:
(1) and (2) taking 1000 parts of tanning comprehensive wastewater, adding 0.5 part of the treating agent for recycling the tanning comprehensive wastewater prepared in the example 1, and stirring and reacting for 30min at room temperature to obtain a reacted solution.
(2) Continuously passing the reacted solution obtained in the step (1) through a horizontal centrifuge, centrifuging at the rotating speed of 3000 r/min, performing solid-liquid separation, and collecting supernatant;
(3) and (3) subjecting the supernatant obtained in the step (2) to fixed bed adsorption treatment by using coconut shell activated carbon with the particle size of 20-60 meshes to obtain reuse water.
Example 7
This example refers to the processing method of example 6, with the only difference that: the treating agent for recycling the tanning comprehensive wastewater prepared in the step (1) in the embodiment 1 is replaced by the treating agent for recycling the tanning comprehensive wastewater prepared in the embodiment 2 with equal mass.
Example 8
This example refers to the processing method of example 6, with the only difference that: the treating agent for recycling the tanning comprehensive wastewater prepared in the step (1) in the example 1 is replaced by the treating agent for recycling the tanning comprehensive wastewater prepared in the example 3 with equal quality.
Example 9
This example refers to the processing method of example 6, with the only difference that: the treating agent for recycling the tanning comprehensive wastewater prepared in the step (1) in the example 1 is replaced by the treating agent for recycling the tanning comprehensive wastewater prepared in the example 4 with equal quality.
Example 10
This example refers to the processing method of example 6, with the only difference that: the treating agent for recycling the tanning comprehensive wastewater prepared in the step (1) in the example 1 is replaced by the treating agent for recycling the tanning comprehensive wastewater prepared in the example 5 with equal quality.
Comparative example 1
Comparative example 1 the treating method of example 6 was referred to, except that the treating agent in step (1) was different in kind and used in the same amount.
The treating agent used in comparative example 1 comprises the following components in parts by weight: 80 parts of polyethyleneimine and 20 parts of polyaluminum chloride, and 900 parts of water.
Comparative example 2
Comparative example 2 the treating method of example 6 was referred to, except that the treating agent in the step (1) was different in kind and used in the same amount.
The treating agent adopted in comparative example 2 comprises the following components in parts by weight: 60 parts of polyquaternium-6, 40 parts of polyaluminium chloride and 900 parts of water.
Comparative example 3
Comparative example 3 the treatment process of example 6 is referred to, with the difference that the tannery complex wastewater in step (1) is replaced with wastewater from the tannery dyeing and finishing section.
Examples of the experiments
In order to illustrate the components of the supernatant and the reuse water obtained after the wastewater treatment of the examples and comparative examples of the present invention, the supernatant and the reuse water after the treatment of the examples and comparative examples were examined, and the results of the examination are shown in tables 1 and 2, respectively.
TABLE 1 test results of differently treated supernatants and corresponding wastewaters before treatment
| Numbering | COD(mg/L) | Color intensity |
| Comprehensive waste water before treatment | 280 | 300 |
| Before treatment, leather-making dyeing and finishing section wastewater | 2844 | 1120 |
| Example 6 | 118 | 110 |
| Example 7 | 109 | 85 |
| Example 8 | 107 | 95 |
| Example 9 | 84 | 45 |
| Example 10 | 102 | 70 |
| Comparative example 1 | 205 | 165 |
| Comparative example 2 | 152 | 125 |
| Comparative example 3 | 2362 | 750 |
Table 2 test results of treated reuse water
| Numbering | COD(mg/L) | Color intensity |
| Example 6 | 96 | 70 |
| Example 7 | 75 | 60 |
| Example 8 | 72 | 55 |
| Example 9 | 45 | 20 |
| Example 10 | 53 | 35 |
| Comparative example 1 | 168 | 100 |
| Comparative example 2 | 132 | 90 |
| Comparative example 3 | 1834 | 430 |
Wherein, COD is determined according to the chemical oxygen demand of the national standard GB11914-89, and the chroma is determined according to the platinum-cobalt colorimetric method in the national standard GB 11903-89.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The treating agent for recycling the tanning comprehensive wastewater is characterized by comprising the following components in parts by weight:
75-85 parts of polyquaternium and 15-25 parts of flocculating agent;
the molecular weight of the polyquaternium is 2-40 ten thousand.
2. The treating agent for recycling tanning comprehensive wastewater as claimed in claim 1, wherein the polyquaternium comprises any one or more of polyquaternium-6, polyquaternium-7 and polyquaternium-11.
3. The treating agent for recycling tannery integrated wastewater according to claim 1, wherein the flocculant is selected from inorganic flocculants;
preferably, the inorganic flocculant comprises an inorganic polymeric flocculant.
4. The treating agent for recycling tanning comprehensive wastewater according to claim 3, wherein the inorganic polymeric flocculant comprises an aluminum salt inorganic polymeric flocculant and an iron salt inorganic polymeric flocculant;
preferably, the inorganic polymeric flocculant comprises any one or more of polyaluminium chloride, polyaluminium sulfate, polyaluminium ferric sulfate and polyferric sulfate.
5. The treating agent for recycling tanning comprehensive wastewater as recited in any one of claims 1 to 4, further comprising 800 to 1000 parts by weight of water.
6. The preparation method of the treating agent for recycling tanning wastewater as recited in any one of claims 1 to 5, comprising the steps of:
the components are mixed evenly according to the proportion.
7. The treatment method for recycling the tanning comprehensive wastewater is characterized by comprising the following steps: mixing and reacting the tanning comprehensive wastewater with a treating agent for 15-60 min, carrying out solid-liquid separation, and collecting clear liquid; carrying out adsorption treatment on the clear liquid;
the treating agent is the treating agent for the leather-making comprehensive wastewater reuse according to any one of claims 1 to 5.
8. The method for treating the recycling of the tanning comprehensive wastewater as recited in claim 7, wherein the adsorption treatment is performed by using a fixed bed, a fluidized bed or an adsorption tower;
preferably, the fixed bed, the fluidized bed or the adsorption tower is filled with activated carbon;
preferably, the particle size of the activated carbon is 20-60 meshes.
9. The method for treating the recycling of tanning comprehensive wastewater according to claim 7, wherein in the comprehensive wastewater, the COD concentration is not higher than 500 mg/L; the chroma is not higher than 400.
10. The method for treating the recycling of the tanning comprehensive wastewater according to any one of claims 7 to 9, wherein the addition amount of the treating agent is 0.2 to 1kg per ton of wastewater.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101781034A (en) * | 2009-01-19 | 2010-07-21 | 北京泛博科技有限责任公司 | Water treatment agent and preparation method and application thereof |
| CN111348695A (en) * | 2020-03-16 | 2020-06-30 | 广州亿奇科技股份有限公司 | Sewage treating agent and production process thereof |
| CN111559817A (en) * | 2020-04-07 | 2020-08-21 | 华东理工大学 | Method for reducing chroma and COD of leather tanning dyeing wastewater and application thereof |
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- 2021-03-10 CN CN202110260728.8A patent/CN113044941A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101781034A (en) * | 2009-01-19 | 2010-07-21 | 北京泛博科技有限责任公司 | Water treatment agent and preparation method and application thereof |
| CN111348695A (en) * | 2020-03-16 | 2020-06-30 | 广州亿奇科技股份有限公司 | Sewage treating agent and production process thereof |
| CN111559817A (en) * | 2020-04-07 | 2020-08-21 | 华东理工大学 | Method for reducing chroma and COD of leather tanning dyeing wastewater and application thereof |
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