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

Catalytic ozonation-based pretreatment method for acid wastewater containing water-soluble polymer hard to degrade

A water-soluble polymer, ozonation technology, applied in the fields of oxidized water/sewage treatment, water/sewage treatment, special compound water treatment, etc., can solve the problems of unachieved degradation of pollutants, harsh treatment conditions, and low treatment efficiency. , to achieve the effect of easy operation, good stability and less dosage

Active Publication Date: 2020-11-24
JILIN UNIV
View PDF13 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to relevant literature and engineering examples at home and abroad, the current treatment method for acidic wastewater is the Fenton method, but it often causes secondary pollution due to the generation of iron sludge during the reaction process; the treatment method for water-soluble polymer wastewater has adsorption method, foam separation method, membrane treatment method, coagulation and flocculation and other methods. Although these methods can effectively separate pollutants, they have not achieved the degradation of pollutants. In addition, these methods have relatively strict requirements on treatment conditions. , the cost is relatively high
[0003] As an important branch of the advanced oxidation method, the catalytic ozonation technology has been widely used in recent years due to its advantages of high treatment efficiency and no residue in the reaction. Sewage treatment, however, the low treatment efficiency of this technology in acidic environment is an important factor limiting its application
Hydrogen peroxide is widely used in the field of water treatment as a commonly used oxidizing agent and additive, such as photocatalysis and Fenton systems, but the progress of these reaction systems is often accompanied by a large amount of hydrogen peroxide, resulting in waste of resources

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
  • Catalytic ozonation-based pretreatment method for acid wastewater containing water-soluble polymer hard to degrade
  • Catalytic ozonation-based pretreatment method for acid wastewater containing water-soluble polymer hard to degrade
  • Catalytic ozonation-based pretreatment method for acid wastewater containing water-soluble polymer hard to degrade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Experimental device such as figure 1 As shown, the reaction system consists of an ozone generator 1, a gas inlet device 3 (rubber tube with a valve), an Erlenmeyer flask reactor 4 equipped with waste water to be treated 5, a solid catalyst 6 and a magnetic rotor 12, and a glass aeration head 11. Hydrogen peroxide dripping device 9, sampling device 8, magnetic stirrer 7 and tail gas absorbing device 13 are composed; ozone 2 produced by ozone generator 1 using oxygen as a gas source enters the Erlenmeyer flask reactor through gas inlet device 3 4; the end of the gas inlet device 3 is provided with an aeration device with a glass aeration head 11, and the glass aeration head 11 is immersed in the waste water 5 to be treated; a hydrogen peroxide dripping device is installed on the top of the conical flask reactor 4 9 and sampling device 8; Erlenmeyer flask reactor 4 is seated on the magnetic stirrer 7; after the waste water 5 to be treated in the Erlenmeyer flask reactor 4 ...

Embodiment 2

[0030] The PVC centrifugal mother liquor discharged from the PVC production and polymerization stage in a chlor-alkali factory was used for experiments. The initial PVA concentration of the wastewater was 3mg / L, the COD concentration was 190mg / L, and the initial pH was 5.3. After processing according to the method described in Example 1, the removal rate of PVA in the water sample is close to 100%, and the reaction time is extended to 2h, and the removal rate of COD is about 80%.

Embodiment 3

[0032] PVA particles with a degree of polymerization of 1750±50 were dissolved in distilled water to prepare simulated wastewater, and mixed with the collected PVC centrifuge mother liquor discharged from the PVC production polymerization stage in a chlor-alkali factory for experiments. The initial PVA concentration of the mixed wastewater was 23mg / L, the COD concentration is 250mg / L, and the initial pH is adjusted to 3. After treatment according to the method described in Example 1, the removal rate of PVA in the water sample was close to 100%, and the reaction time was extended to 2 hours, and the removal rate of COD was about 72%.

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
degree of polymerizationaaaaaaaaaa
Login to View More

Abstract

The invention relates to a catalytic ozonation-based pretreatment method for acid wastewater containing water-soluble polymer hard to degrade, and belongs to the technical field of wastewater treatment. According to the method, firstly, an activated aluminum oxide loaded copper manganese oxide catalyst is prepared, wherein the load rate of copper manganese oxide on activated aluminum oxide particle carriers is 3-5wt. %, and the molar ratio of the copper component to the manganese component is 1:(1-3); then the catalyst is added to to-be-treated wastewater with a pH range of 3-5.5, then an additive hydrogen peroxide solution is added into the wastewater, ozone is introduced and aeration is performed under the condition of room temperature, and then magnetic stirring is performed at a rotation speed of 120-200 rpm, thereby realizing catalytic ozonation-based pretreatment of the acid wastewater containing the water-soluble polymer hard to degrade. The pretreatment method is a novel advanced oxidation technology, is easy to operate, and solves the problem that water-soluble polymer pollutants in the wastewater with relatively low pH are not easy to oxidize and degrade (catalytic ozonation method); and long chains of pollutant molecules are broken, thus being conducive to subsequent biological treatment or membrane treatment.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a method for pretreatment of acidic wastewater containing refractory water-soluble polymers based on catalytic ozonation. changes in molecular weight distribution. Background technique [0002] At present, my country is still a country seriously short of water. In view of the current situation of water shortage, sewage purification has become an important countermeasure. With the increasing application of water-soluble polymer compounds in industry, such substances (such as polyvinyl alcohol (PVA), etc.) often exist in many types of industrial wastewater. Moreover, wastewater containing such substances, such as textile printing and dyeing, has an extreme pH (such as strong acidity). In addition, the characteristics of being difficult to be degraded by microorganisms and easily clogging the filter membrane make direct biological treatment or membrane tre...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/78C02F1/72C02F101/30
CPCC02F1/722C02F1/725C02F1/78C02F2101/30C02F2305/023C02F2305/02
Inventor 花修艺闫征楚董德明朱建鑫
Owner JILIN UNIV
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