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Composite coagulant for industrial wastewater treatment and preparation method thereof

A technology for industrial wastewater and coagulant, which is applied in water treatment parameter control, water/sewage treatment, adsorbed water/sewage treatment, etc. It can solve the problems of unsatisfactory decolorization effect, unstable effluent quality, and poor COD reduction ability. Achieve the effect of good solid-liquid separation, good coagulation effect and less sludge.

Pending Publication Date: 2022-03-25
昆山节源环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The key of the coagulation method is the coagulant used. The existing coagulants used for industrial wastewater treatment generally use polyferric sulfate or polyaluminum chloride as the coagulant, which has single performance and narrow application range. Large amount, resulting in too much sludge finally formed, and poor COD reduction ability, unsatisfactory decolorization effect, unstable effluent quality, difficult to meet discharge standards

Method used

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  • Composite coagulant for industrial wastewater treatment and preparation method thereof
  • Composite coagulant for industrial wastewater treatment and preparation method thereof
  • Composite coagulant for industrial wastewater treatment and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] The components of the composite coagulant for industrial wastewater treatment in this embodiment are as follows: 1000 g of modified cationic coagulant, 20 g of strong oxidizing agent (sodium chlorate or potassium permanganate), 60 g of bentonite, 360 g of modified fly ash, With inorganic salt 40g.

[0036] Among them, the compound inorganic salt is CaCl with a mass ratio of 1:3:4 2 , MgCl 2 and FeCl 3 mixture.

[0037] The preparation process of modified cationic coagulant, such as figure 1 Shown:

[0038] (1) aluminum chloride hexahydrate is dissolved in the hydrochloric acid solution of 0.2mol / L, is configured into the aluminum chloride aqueous solution that mass concentration is 58%;

[0039] (2) Add acrylamide and the aluminum chloride aqueous solution obtained in step (1) to the reaction vessel, the addition of acrylamide is 12% of the quality of aluminum chloride hexahydrate, stir and mix, and feed nitrogen to drive oxygen for 10 -20min;

[0040] (3) Add th...

Embodiment 2

[0047] The components of the composite coagulant for industrial wastewater treatment in this embodiment are as follows: 1000g of modified cationic coagulant, 40g of strong oxidizing agent (sodium chlorate or potassium permanganate), 100g of bentonite, 300g of modified fly ash, With inorganic salt 60g.

[0048] Among them, the compound inorganic salt is CaCl with a mass ratio of 1:5:2 2 , MgCl 2 and FeCl 3 mixture.

[0049] The preparation process of modified cationic coagulant is as follows:

[0050] (1) aluminum chloride hexahydrate is dissolved in the hydrochloric acid solution of 0.5mol / L, is configured into the aluminum chloride aqueous solution that mass concentration is 50%;

[0051] (2) Acrylamide and the aluminum chloride aqueous solution obtained in step (1) are added in the reaction vessel, the addition of acrylamide is 15% of the quality of aluminum chloride hexahydrate, stirring and mixing, and feeding nitrogen to drive oxygen for 10 -20min;

[0052] (3) Add ...

Embodiment 3

[0056] The components of the composite coagulant for industrial waste water treatment in this embodiment are as follows: 1000g of modified cationic coagulant, 50g of strong oxidizing agent (sodium chlorate or potassium permanganate), 80g of bentonite, 420g of modified fly ash, With inorganic salt 100g.

[0057] Among them, the compound inorganic salt is CaCl with a mass ratio of 1:6:3 2 , MgCl 2 and FeCl 3 mixture.

[0058] The preparation process of modified cationic coagulant is as follows:

[0059] (1) aluminum chloride hexahydrate is dissolved in the hydrochloric acid solution of 0.5mol / L, is configured into the aluminum chloride aqueous solution that mass concentration is 56%;

[0060] (2) Add acrylamide and the aqueous aluminum chloride solution obtained in step (1) to the reaction vessel, the amount of acrylamide added is 10% of the quality of aluminum chloride hexahydrate, stir and mix, and feed nitrogen to drive oxygen for 10 -20min;

[0061] (3) Add the dissolv...

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Abstract

The invention discloses a composite coagulant for industrial wastewater treatment. The composite coagulant comprises the following components in parts by mass: 100 parts of a modified cationic coagulant, 1-5 parts of a strong oxidant, 5-10 parts of bentonite, 30-50 parts of modified fly ash and 4-10 parts of a compound inorganic salt. The sewage treatment agent has a good coagulation treatment effect on different wastewater qualities, especially has obvious effects on decoloration and COD removal, and is small in dosage, short in operation time, fast in separation and precipitation and small in sludge amount.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a composite coagulant for wastewater treatment and a preparation method thereof. Background technique [0002] With the development of the country's economy, the discharge of industrial wastewater has increased significantly. Industrial wastewater refers to the wastewater and waste liquid generated in the process of industrial production, which contains industrial production materials, intermediate products, by-products and waste generated in the production process that are lost with water. pollutants. The discharge of industrial wastewater is large, with various types of pollutants and complex components. Once these industrial wastewater is discharged into natural water bodies, it will cause serious water pollution, which will eventually cause a series of environmental problems and water shortages. [0003] The treatment of industrial wastewater generally includes biolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/56C02F1/72C02F1/76C02F1/28
CPCC02F1/5245C02F1/56C02F1/72C02F1/76C02F1/281C02F2209/08C02F2303/06
Inventor 曹团结
Owner 昆山节源环保科技有限公司
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