A kind of composite flocculant for printing and dyeing wastewater treatment

A composite flocculant, printing and dyeing wastewater technology, applied in textile industry wastewater treatment, water/sewage treatment, adsorption water/sewage treatment, etc. Operating and post-treatment costs, flocculation excitation effect and effect of good gel nucleation and high crosslink density

Active Publication Date: 2022-06-21
XINXIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the problem that the existing printing and dyeing wastewater treatment adsorption or flocculation materials have single function and poor removal efficiency, the present invention provides a composite flocculant for printing and dyeing wastewater treatment that can simultaneously realize flocculation and decolorization, high removal efficiency, and no secondary pollution

Method used

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  • A kind of composite flocculant for printing and dyeing wastewater treatment
  • A kind of composite flocculant for printing and dyeing wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A composite flocculant for printing and dyeing wastewater treatment, prepared from the following raw materials in parts by weight: 15 parts of activated carbon fiber, 4 parts of acrylamide, 0.003 parts of initiator, 2 parts of sodium carboxymethyl cellulose, and 5 parts of polyvinyl alcohol , 3 parts of crosslinking agent, 3 parts of polyethyleneimine-cellulose composite material, 10 parts of starch xanthate, 25 parts of modified bentonite.

[0035] Further, the activated carbon fiber is obtained from biomass material through hydrothermal carbonization and sulfuric acid activation; its preparation method is as follows:

[0036] (1) removing impurities, washing and drying the biomass material for subsequent use;

[0037](2) Put the dried biomass material into the hydrothermal reaction kettle, add deionized water, immerse the biomass material, program the temperature to 220 ° C, react for 24 hours, and then cool to room temperature;

[0038] (3) The reacted substance is ...

Embodiment 2

[0051] A composite flocculant for printing and dyeing wastewater treatment, prepared from the following raw materials in parts by weight: 17 parts of activated carbon fiber, 6 parts of acrylamide, 0.004 part of initiator, 5 parts of sodium carboxymethyl cellulose, and 9 parts of polyvinyl alcohol , 4 parts of crosslinking agent, 4 parts of polyethyleneimine-cellulose composite material, 12 parts of starch xanthate, and 30 parts of modified bentonite.

[0052] Further, the activated carbon fiber is obtained from biomass material through hydrothermal carbonization and sulfuric acid activation; its preparation method is as follows:

[0053] (1) removing impurities, washing and drying the biomass material for subsequent use;

[0054] (2) Put the dried biomass material into the hydrothermal reaction kettle, add deionized water, immerse the biomass material, program the temperature to 220 ° C, react for 24 hours, and then cool to room temperature;

[0055] (3) The reacted substance...

Embodiment 3

[0068] A composite flocculant for printing and dyeing wastewater treatment, prepared from the following raw materials in parts by weight: 23 parts of activated carbon fiber, 9 parts of acrylamide, 0.005 part of initiator, 7 parts of sodium carboxymethylcellulose, and 13 parts of polyvinyl alcohol , 5 parts of crosslinking agent, 4.5 parts of polyethyleneimine-cellulose composite material, 14 parts of starch xanthate, and 32 parts of modified bentonite.

[0069] Further, the activated carbon fiber is obtained from biomass material through hydrothermal carbonization and sulfuric acid activation; its preparation method is as follows:

[0070] (1) removing impurities, washing and drying the biomass material for subsequent use;

[0071] (2) Put the dried biomass material into the hydrothermal reaction kettle, add deionized water, immerse the biomass material, program the temperature to 220 ° C, react for 24 hours, and then cool to room temperature;

[0072] (3) The reacted substan...

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Abstract

The invention discloses a composite flocculant for printing and dyeing wastewater treatment, which is prepared from the following raw materials in parts by weight: 15-25 parts of activated carbon fiber, 4-11 parts of acrylamide, 2-9 parts of sodium carboxymethyl cellulose, 5~17 parts of polyvinyl alcohol, 3~6 parts of crosslinking agent, 0.003~0.006 parts of initiator, 3~5 parts of polyethyleneimine-cellulose composite material, 10~15 parts of starch xanthate, modified bentonite 25~36 servings. The composite flocculant provided by the invention does not contain complex components, radiation, and components that are likely to cause secondary pollution. The raw materials used are natural and environmentally friendly, cheap and easy to obtain, the preparation method is simple, and the dosage is small. Multiple functions such as deodorization, fast sedimentation rate, high removal rate of organic matter, dye molecules and heavy metals, stable structure and properties, and wide application range.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a composite flocculant for printing and dyeing wastewater treatment. Background technique [0002] Printing and dyeing wastewater is wastewater discharged from printing and dyeing factories that mainly process cotton, hemp, chemical fibers and their blended products. Printing and dyeing wastewater has a large amount of water, 100-200 tons of water is consumed per ton of textile printing and dyeing, and 80-90% of it becomes wastewater. Textile printing and dyeing wastewater has the characteristics of large water volume, high content of organic pollutants, high alkalinity, and large changes in water quality. It is one of the most difficult industrial wastewater to treat. Impurities, sand substances, inorganic salts, etc. [0003] At present, the common flocculants on the market, including polyferric sulfate, polyaluminum sulfate, etc., need a certain coagulant aid wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/00C02F1/28C02F1/52C02F1/56C02F101/20C02F101/30C02F103/30
Inventor 王晓钰王凯凯曾艳谢艳新陈改荣朱宝库
Owner XINXIANG UNIV
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