Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Treatment method of printing and dyeing wastewater by combined adsorption, flocculation and membrane separation

A technology for printing and dyeing wastewater and a treatment method, which is applied in the field of printing and dyeing wastewater treatment, can solve the problems of easy cracking of ceramic filter membranes, complicated preparation procedures, poor resistance to mechanical damage, etc., and achieves good removal effect, good binding, and good mechanical properties. Effect

Active Publication Date: 2019-10-08
浙江海印数码科技有限公司
View PDF11 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of this method is more complicated, the cycle is long, and the prepared ceramic filter membrane is easier to crack and has poor resistance to mechanical damage.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Treatment method of printing and dyeing wastewater by combined adsorption, flocculation and membrane separation
  • Treatment method of printing and dyeing wastewater by combined adsorption, flocculation and membrane separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for treating printing and dyeing wastewater combined with adsorption-flocculation-membrane separation, comprising the following steps:

[0031] (1) Add 10g of 3-chloro-2-hydroxypropyltrimethylammonium chloride to deionized water to prepare a modified solution, mix 0.008g of chitosan and deionized water and stir at 50°C until the solid dissolves , prepare the chitosan aqueous solution, and mix it with the modified solution evenly, then add ammonia water to adjust the pH of the solution to 10-12, reflux at 100°C for 3 hours, cool to room temperature after the reaction, filter, and dry the solid , making quaternized chitosan;

[0032] (2) Sodium alginate and deionized water are mixed and stirred at 40° C. until the solid dissolves to obtain a sodium alginate solution with a mass concentration of 3%, which is added to a calcium chloride solution with a mass concentration of 5%. The mass ratio of sodium alginate to calcium chloride is 2:0.3, keep stirring and react...

Embodiment 2

[0038] A method for treating printing and dyeing wastewater combined with adsorption-flocculation-membrane separation, comprising the following steps:

[0039] (1) Add 10g of 3-chloro-2-hydroxypropyltrimethylammonium chloride to deionized water to prepare a modified solution, mix 0.015g of chitosan and deionized water and stir at 50°C until the solid dissolves , prepare the chitosan aqueous solution, and mix it with the modified solution evenly, add ammonia water to adjust the pH of the solution to 10-12, reflux at 150°C for 3 hours, cool to room temperature after the reaction, filter, and dry the solid , making quaternized chitosan;

[0040] (2) Sodium alginate and deionized water are mixed and stirred at 40° C. until the solid dissolves to obtain a sodium alginate solution with a mass concentration of 3%, which is added to a calcium chloride solution with a mass concentration of 5%. The mass ratio of sodium alginate to calcium chloride is 2:0.6, keep stirring and reacting a...

Embodiment 3

[0046] A method for treating printing and dyeing wastewater combined with adsorption-flocculation-membrane separation, comprising the following steps:

[0047] (1) Add 10g of 3-chloro-2-hydroxypropyltrimethylammonium chloride to deionized water to prepare a modified solution, mix 0.01g of chitosan and deionized water and stir at 50°C until the solid dissolves , prepare the chitosan aqueous solution, and mix it with the modified solution evenly, then add ammonia water to adjust the pH of the solution to 10-12, reflux at 110°C for 3 hours, cool to room temperature after the reaction, filter, and dry the solid , making quaternized chitosan;

[0048] (2) Sodium alginate and deionized water are mixed and stirred at 40° C. until the solid dissolves to obtain a sodium alginate solution with a mass concentration of 3%, which is added to a calcium chloride solution with a mass concentration of 5%. The mass ratio of sodium alginate to calcium chloride is 2:0.4, keep stirring and reacti...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Apertureaaaaaaaaaa
Login to View More

Abstract

The invention provides a treatment method of printing and dyeing wastewater by combined adsorption, flocculation and membrane separation. The method comprises the following steps: firstly, separatelypreparing quaternized chitosan and sodium alginate microspheres, adding the quaternized chitosan and the sodium alginate microspheres into deionized water, and then dropwise adding a glutaraldehyde solution to carry out a cross-linking reaction to prepare a composite flocculant; preparing a zirconium oxide filter membrane by adopting a sol-gel method, then carrying out silanization treatment on the zirconium oxide filter membrane, and preparing a layer of yttrium-doped titanium oxide on the surface of the zirconium oxide filter membrane to form a composite nanofiltration membrane; and firstlycarrying out adsorption treatment on printing and dyeing wastewater by activated carbon, then adding the prepared composite flocculant into the treated wastewater for precipitation treatment, and finally carrying out nanofiltration treatment on the supernate subjected to flocculation treatment by the nanofiltration membrane, wherein the treated wastewater meets emission requirements. According tothe method, the method of combined adsorption, flocculation and membrane separation is adopted to treat the printing and dyeing wastewater, so that the removal rate of pollutants is high, pollution ofthe membrane in the treatment process is small, and the prepared nanofiltration membrane is excellent in mechanical property.

Description

Technical field: [0001] The invention relates to the field of printing and dyeing wastewater treatment, in particular to a treatment method for printing and dyeing wastewater combining adsorption-flocculation-membrane separation. Background technique: [0002] Due to the increase of population and the rapid development of economy, the water consumption continues to increase, resulting in a serious shortage of water resources. The contradiction between supply and demand of water resources is becoming more and more prominent. The shortage of water resources has become one of the most prominent social problems in all countries in the world. my country's water environment pollution is also becoming more and more serious, and the shortage of water quality-based water resources caused by water pollution is gradually becoming normal. In the field of sewage, industrial wastewater accounts for more than half. Among various industrial industries, the total discharge of printing wastew...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C02F9/04C02F103/30
CPCC02F1/283C02F1/442C02F1/5263C02F9/00C02F2103/30
Inventor 宋水友宋丽娜
Owner 浙江海印数码科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com