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

Method for treating degradation-resistant organic wastewater by using Fenton oxidation intensified supercritical water oxidation method

A technology of organic wastewater and Fenton oxidation, applied in the direction of oxidized water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as unreachable effects, reduce reaction conditions, and improve degradation effects Effect

Inactive Publication Date: 2019-06-21
ZHEJIANG UNIV OF TECH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical applications, using a certain processing technology alone cannot achieve very satisfactory results.

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
  • Method for treating degradation-resistant organic wastewater by using Fenton oxidation intensified supercritical water oxidation method
  • Method for treating degradation-resistant organic wastewater by using Fenton oxidation intensified supercritical water oxidation method
  • Method for treating degradation-resistant organic wastewater by using Fenton oxidation intensified supercritical water oxidation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The initial TOC concentration of the used phenol waste water of the present invention and p-nitrophenol waste water is 1000mg / L; FeSO 4 ·7H 2 O(AR,≥98%) formulated as Fe 2+ The aqueous solution with a concentration of 1.5mg / L is used as a catalyst; 30wt% hydrogen peroxide is used as an oxidant; the pressure is set to 23MPa, and 98% concentrated sulfuric acid solution is prepared into a 0.01mol / L solution to adjust the pH, and the pH is adjusted to 3.0; the temperature is set separately 380°C, 400°C, 420°C, 440°C, 460°C, 480°C; the injection flow rate is 2mL / min, and the corresponding residence time is 217.3s.

[0028] Phenol wastewater, p-nitrophenol wastewater, oxidant, and ferrous ion solution were respectively passed through a low-pressure gradient mixer in a volume ratio of 9:5:10, and then mixed by a high-pressure constant-flow pump into a stainless steel pipe (outer diameter 1 / 8 ", with an inner diameter of 1.5mm), the tubular reactor is placed in a box-type res...

Embodiment 2

[0034] The initial TOC concentration of 2-naphthol wastewater and p-aminonaphthalenesulfonic acid wastewater is 1000mg / L; FeSO 4 ·7H 2 O(AR,≥98%) formulated as Fe 2+ A solution with a concentration of 1.5mg / L is used as a catalyst; 30wt% hydrogen peroxide is used as an oxidant; the pressure is set to 23MPa, and 98% concentrated sulfuric acid solution is prepared into a 0.01mol / L solution to adjust the pH, and the pH is adjusted to 3.0; the temperature is set separately 380°C, 400°C, 420°C, 440°C, 460°C, 480°C; the injection flow rate is 2mL / min, and the corresponding residence time is 217.3s.

[0035] Naphthol wastewater, p-aminonaphthalenesulfonic acid wastewater, oxidant, and ferrous ion solution were respectively passed through a low-pressure gradient mixer at a volume ratio of 9:5:10, and then mixed by a high-pressure constant-flow pump into a stainless steel pipe (outer diameter 1 / 8", inner diameter 1.5mm), the tubular reactor is placed in a box-type resistance furnace...

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

No PUM Login to View More

Abstract

The invention discloses a method for treating degradation-resistant organic wastewater by using a Fenton oxidation intensified supercritical water oxidation method. According to the method, Fe<2+> isintroduced into supercritical water oxidation to form a Fenton reagent with an oxidant H2O2 in the system, a completely new environment is formed under coaction of the Fe<2+> and the oxidant H2O2, that is, a supercritical Fenton oxidation environment, oxidation degradation is implemented for 100-370 seconds, the pH value of the reaction system is controlled to 2-6, and the degradation process is completed after complete degradation. By adopting the method disclosed by the invention, an expected temperature is remarkably reduced, the use rate of the oxidant can be increased, the time for reactions can be shortened, a good removal effect can be achieved under a gentle condition, synergetic effects of SCWO (Super Critic Wet Air Oxidation) and Fenton oxidation are achieved indeed, and a novelidea is provided for industrial application of SCWO.

Description

[0001] (1) Technical field [0002] The invention relates to an advanced oxidation method for treating refractory organic waste water. [0003] (2) Background technology [0004] High-concentration, refractory organic wastewater from pharmaceutical and chemical industries has high toxicity and complex components. Direct biological treatment technology has little effect on its degradation. Advanced oxidation technology is usually used to pretreat this type of wastewater. [0005] Supercritical water oxidation technology uses water as the medium to react free radicals under supercritical conditions (temperature>374°C, P>22.1MPa). As an efficient and environment-friendly technology, because of its absence of mass transfer resistance, the oxidation reaction has a high oxidation rate and destruction rate, can completely destroy the structure of organic matter, and has the characteristics of small secondary pollution, so it is widely used in the field of wastewater treatment. ...

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): C02F1/72C02F101/38
Inventor 刘欢林春绵王军良周新凯
Owner ZHEJIANG UNIV OF TECH
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