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

Semi-coke waste water pretreatment method based on Electro-Fenton oxidization technology

A semi-carbon wastewater and pretreatment technology, applied in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as high treatment cost, secondary pollution, and application limitations of Fenton's method , to achieve the effect of improving the degradation efficiency

Inactive Publication Date: 2012-08-15
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
View PDF2 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional Fenton reagent method is to add two chemical raw materials, ferrous sulfate and hydrogen peroxide, to the water to work together to degrade organic pollutants, and the treatment cost is relatively high.
Hydrogen peroxide is dangerous during storage and transportation. A large amount of sulfate radicals are brought into the water, and the system produces a large amount of iron sludge, which will cause secondary pollution. Therefore, the application of the traditional Fenton method is limited.

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
  • Semi-coke waste water pretreatment method based on Electro-Fenton oxidization technology
  • Semi-coke waste water pretreatment method based on Electro-Fenton oxidization technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The working cathode used in this implementation example is a gas diffusion electrode with a stainless steel mesh as a conductive and supporting framework, and a mixture of graphite, polytetrafluoroethylene, pore-forming agent and catalyst as a catalytic coating; the anode is an ordinary stainless steel plate electrolytically treated blue carbon waste water. In order to increase the processing capacity of the device, the gas diffusion electrode and the stainless steel anode are connected in parallel by multiple sets of electrodes. Keep the air flow in the wastewater at 2.5L / min and the current density at 5.2mA / cm 2 , the distance between the plates is 2cm, and the pH value of the wastewater is adjusted to 3 for electrolysis. After treatment, the COD removal rate of wastewater can reach 78.62%.

Embodiment 2

[0020] The working negative electrode that this implementation example adopts is the gas diffusion electrode that is the gas diffusion electrode of catalytic coating with the mixture of graphite, polytetrafluoroethylene, pore forming agent and catalyzer, and the length, width, The heights are 6cm, 4cm, and 0.2cm respectively; the anode is an ordinary stainless steel plate for electrolytic treatment of blue carbon wastewater. In order to increase the processing capacity of the device, the gas diffusion electrodes and stainless steel anodes are connected in series by multiple sets of electrodes. As shown in the figure, the current density is controlled by a DC power supply to 8.0mA / cm 2 , keep the distance between the plates at 1.5cm, adjust the pH value of the wastewater to 4, and the ventilation rate of the wastewater to 2.5L / min for electrolysis. After treatment, the ammonia nitrogen removal rate of the wastewater can reach 68.50%.

Embodiment 3

[0022] The working cathode used in this implementation example is a gas diffusion electrode with a stainless steel mesh as a conductive and supporting framework, a mixture of graphite, polytetrafluoroethylene, a pore-forming agent and a catalyst as a catalytic coating, and graphite, polytetrafluoroethylene to form a diffusion catalytic layer The mass ratio of vinyl fluoride, pore-forming agent and catalyst is 8:2:1:0.01; the anode is an ordinary stainless steel plate to electrolytically treat semi-coke wastewater. In order to increase the processing capacity of the device, the gas diffusion electrodes and stainless steel anodes are connected in series by multiple sets of electrodes. As shown in the figure, the current density is controlled by a DC power supply to 6.0mA / cm 2 , keep the distance between the plates at 1.5cm, adjust the pH value of the wastewater to 3, and the ventilation rate of the wastewater to 2.5L / min for electrolysis. After treatment, the COD removal rate o...

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 provides a semi-coke waste water pretreatment method based on a Electro-Fenton oxidization technology, which comprises the steps of: using an efficient graphite gas diffusion electrode as a cathode, and using a stainless steel plate as an anode to form an electrochemical oxidization system, controlling such conditions as current density, pole plate distance, waste water pH value andventilatory capacity, to enable the filled air to generate hydrogen peroxide in the cathode region, and forming a Fenton reagent through the Fe<2+> generated by anode electrolysis so as to generate ahydroxyl radical with strong oxidability to oxidize and degrade the organic pollutants, greatly reduce the waste water COD (chemical oxygen demand), improve the biodegradability of the waste water inthe successive processing process, fully remove the pollutants and improve the removal rate; and the pretreatment method provided by the invention is also suitable for the electrolytic treatment process of non-biodegradable organic waste water of spinning, dyeing and the like.

Description

technical field [0001] The invention relates to the field of industrial wastewater treatment, in particular to a semi-coke wastewater pretreatment method based on electric Fenton oxidation technology. Background technique [0002] Semi-coke wastewater has complex components, mainly containing naphthalene, anthracene, quinone and phenolic substances, and also contains a large amount of ring-chain organic compounds, cyanide and ammonia nitrogen. Semi-coke is a semi-coke product, which is produced by low-temperature dry distillation at a temperature of about 650°C, resulting in a large amount of pollutants that have not been oxidized by high temperature in the semi-coke wastewater, and its concentration is about 10 times higher than that of coking wastewater, which is a typical biological Refractory organic wastewater, traditional biochemical methods cannot degrade semi-carbon wastewater. [0003] In recent years, a variety of advanced oxidation technologies (AOPs) have been d...

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): C02F1/461
Inventor 毕强薛娟琴郭莹娟李国平唐长斌张玉洁
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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